JP6910715B2 - Double container, container with dispenser and preform - Google Patents

Description

The present invention is a synthetic resin double container used by attaching a dispenser to the mouth, a container with a dispenser using the double container, and a synthetic test tube having the mouth and used for blow molding. Regarding resin preforms.

Conventionally, a double container made of synthetic resin has been known as a container for storing cosmetics such as lotion, toiletries such as shampoo, conditioner, and liquid soap, or food seasonings such as soy sauce and beverages as the content liquid. There is. For example, Patent Document 1 includes an outer container body forming the outer shell of the container and a volume-reducing and deformable inner container body arranged inside the outer container body, and the outer container body is provided at the mouth of the outer container body. A double container having a structure in which an outside air introduction hole for introducing outside air is provided between the container and the inner container is described.

Such a double container has a pump head having a pump that operates by pushing down, for example, a head having a nozzle at its mouth, and a pouring cap having a check valve at the spout. It is generally used as a container with a pouring tool by attaching a pouring tool such as. According to the double container equipped with the dispenser, when the content liquid is poured from the dispenser, between the outer container body and the inner container body through the outside air introduction hole provided at the mouth of the outer container body. Since it is possible to reduce the volume and deform only the inner container body by introducing the outside air into the container, it is possible to suppress the introduction of the outside air into the inner container body after pouring out the content liquid, and the container body is accommodated in the container. It is possible to suppress deterioration and deterioration of the content liquid.

Japanese Unexamined Patent Publication No. 2015-145249

However, in the conventional double container, an outside air introduction hole for introducing outside air between the outer container body and the inner container body is provided only in the outer container body portion of the mouth portion by, for example, drilling. Therefore, there is a problem that the processing is difficult, and in some cases, the outside air introduction hole may have a poor opening and the function as a double container may be impaired.

An object of the present invention is to solve such a problem, and an object of the present invention is a double container capable of surely introducing outside air between an outer container body and an inner container body. It is an object of the present invention to provide a container with a tool and a preform for blow molding the double container.

The double container of the present invention is a synthetic resin double container used by attaching a pouring tool to the mouth portion, and has a tubular outer mouth portion forming the outer shell of the mouth portion and the outer mouth portion. An outer container body having an outer container main body connected to the lower end of the mouth portion and a locking protrusion provided on the outer peripheral surface of the outer mouth portion for locking the mounting cap of the dispenser, and the outer container body. A tubular inner mouth portion arranged inside the mouth portion, a flange portion extending radially outward from the inner mouth portion and contacting the upper end of the outer mouth portion, and a lower end portion of the inner mouth portion. An inner container body provided inside the outer container main body and having a volume-reducing and deformable inner container body independently of the outer container main body, an inner peripheral surface of the outer mouth portion, and the inner mouth. part outer peripheral surface of the provided projecting toward the other one in at least one of a plurality of projections for retaining the external air introduction gap between the outer mouth and the inner mouth, the An outer groove portion provided on the outer peripheral surface of the outer opening portion and extending from the upper end of the outer opening portion to a lower side than the locking projection, and an outer groove portion provided on the upper end of the outer opening portion to provide the outside air introduction gap on the outer side. It is characterized by having an upper groove portion connected to the groove portion.

In the above configuration, in the double container of the present invention, it is preferable that the outer peripheral surface of the inner opening portion is provided with the three protrusions at equal intervals in the circumferential direction.

In the double container of the present invention, it is preferable that the heights of protrusions from the outer peripheral surfaces of the inner mouths of each of the three protrusions are all the same in the above configuration.

The container with a dispenser of the present invention is characterized by having the double container and the dispenser attached to the mouth portion.

In the above-described configuration, the container with the dispenser of the present invention operates by pushing down the head portion and the inner container in which the dispenser is provided with a nozzle and is held in the mounting cap so as to be vertically movable. It is preferable to provide a pump for pouring out the content liquid contained in the main body from the nozzle.

In the above-described configuration, the container with a pouring tool of the present invention has a pouring port in which the pouring tool is provided in the mounting cap and ejects the content liquid contained inside the inner container main body to the outside, and the pouring port. The outside air that opens and closes the gap between the check valve for the content liquid that opens and closes the communication between the inner container and the main body of the inner container and the outer peripheral surface of the outer mouth portion below the lower end of the mounting cap and the lower end of the outer groove portion. It is preferable to provide a check valve for the introduction path.

The preform of the present invention is a synthetic resin preform formed in a test tubular shape having a mouth portion and used for blow molding, and has a tubular outer mouth portion forming the outer shell of the mouth portion and a tubular outer mouth portion. An outer preform body having an outer preform main body connected to the lower end of the outer mouth portion and a locking protrusion provided on the outer peripheral surface of the outer mouth portion for locking the mounting cap of the dispenser. , A tubular inner mouth portion arranged inside the outer mouth portion, a flange portion extending radially outward from the inner mouth portion and abutting on the upper end of the outer mouth portion, and the inner mouth portion. An inner preform body including an inner preform main body connected to the lower end and arranged inside the outer preform main body, and at least one of an inner peripheral surface of the outer mouth portion and an outer peripheral surface of the inner mouth portion. A plurality of protrusions provided on one side so as to project toward the other, for holding a gap for introducing outside air between the outer mouth portion and the inner mouth portion, and an outer peripheral surface of the outer mouth portion. An outer groove portion that is provided and extends from the upper end of the outer mouth portion to a lower side than the locking projection, and an upper groove portion that is provided at the upper end of the outer mouth portion and connects the outside air introduction gap to the outer groove portion. It is characterized by having.

In the preform of the present invention, in the above configuration, it is preferable that the outer peripheral surface of the inner opening portion is provided with the three protrusions at equal intervals in the circumferential direction.

In the preform of the present invention, in the above configuration, it is preferable that all three protrusions have the same protrusion height from the outer peripheral surface of the inner mouth portion.

According to the present invention, there are provided a double container capable of reliably introducing outside air between the outer container body and the inner container body, a container with a dispenser, and a preform for blow molding the double container. be able to.

It is a half cross-sectional view of the container with a dispenser which is one Embodiment of this invention. It is an enlarged cross-sectional view which shows the main part of the container with a dispenser shown in FIG. 1 in an enlarged manner. It is explanatory drawing which shows the detail of the outer groove part and the upper groove part provided in the outer mouth part. It is a half cross-sectional view of the preform which is one Embodiment of this invention. It is a partial cut-out cross-sectional view of the outer preform body shown in FIG. It is a half cross-sectional view of the inner preform body shown in FIG. It is sectional drawing which shows the modification of the container with a pouring tool shown in FIG.

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

In the present specification, claims, and abstract, "upward" means upward in the posture shown in FIG. 1, and "downward" means the opposite direction.

The container 1 with a dispenser, which is an embodiment of the present invention shown in FIGS. It can be used for storing such as as a content liquid, and has a double container 2 made of synthetic resin and a pouring tool 3.

The double container 2 according to the embodiment of the present invention has a double structure including an outer container body 11 and an inner container body 12 arranged inside the outer container body 11, and the outer shape thereof is as follows. It has a bottle shape having a mouth portion 13 and a body portion 14 connected below the mouth portion 13. The dispensing tool 3 is a pump type (pump head), and the double container 2 is used by attaching the dispensing tool 3 to its mouth portion 13.

The outer container body 11 is a portion forming the outer shell of the double container 2, and is connected to the cylindrical outer mouth portion 11a forming the outer shell of the mouth portion 13 and the lower end of the outer mouth portion 11a and is connected to the body portion 14. It has a bottomed cylindrical outer container main body 11b that forms the outer shell of the above.

The outer mouth portion 11a is not limited to a cylindrical shape, but may be an elliptical shape or a square tubular shape as long as it is tubular. Further, the shape of the body portion 14 can be variously changed as long as it can accommodate the content liquid.

In the present embodiment, the outer container body 11 is formed of a synthetic resin material mainly composed of polyethylene terephthalate (PET), the outer port portion 11a is rigidly configured, and the outer container main body portion 11b is a content liquid. Is configured to have rigidity that does not easily deform even if it is poured out.

On the outer peripheral surface of the outer opening portion 11a, a locking projection 11c for locking the mounting cap 3a of the dispenser 3 is provided integrally with the outer opening portion 11a. In the present embodiment, the locking protrusion 11c is configured as a male screw, and the dispenser 3 screw-couples the mounting cap 3a to the male screw (locking protrusion 11c) at the female screw 3b provided on the inner peripheral surface thereof. By making it, it is attached to the mouth portion 13.

The locking projection 11c is formed in a rib shape extending along the circumferential direction of the outer opening portion 11a, and the locked projection provided on the inner peripheral surface of the mounting cap 3a is undercut into the locking projection 11c by tapping. By engaging the mounting cap 3a, the mounting cap 3a can be mounted on the mouth portion 13.

The inner container body 12 has a cylindrical inner mouth portion 12a arranged inside the outer mouth portion 11a. The inner opening portion 12a is configured to be rigid like the outer opening portion 11a. The outer diameter dimension of the inner opening portion 12a is smaller than the inner diameter dimension of the outer opening portion 11a, whereby the opening portion is provided between the outer peripheral surface of the inner opening portion 12a and the inner peripheral surface of the outer opening portion 11a. A gap 15 for introducing outside air is provided, which reaches from the upper end to the lower end of 13 and becomes a substantially cylindrical space. The gap 15 for introducing outside air does not have to reach the lower end of the mouth portion 13 as long as it extends from the upper end to the lower end of the mouth portion 13.

The inner opening portion 12a is not limited to the cylindrical shape, and when the outer opening portion 11a is formed into an elliptical shape or a square tubular shape, the inner opening portion 12a can be formed into an elliptical shape or a square tubular shape correspondingly. Further, for example, the outer opening portion 11a may be cylindrical and the inner opening portion 12a may be polygonal tubular, and the corner portion of the polygonal tubular inner opening portion 12a may be a protrusion 12d described later, or the outer opening portion. 11a may be a polygonal cylinder, the inner mouth portion 12a may be cylindrical, and each side portion of the polygonal tubular outer mouth portion 11a that abuts on the outer peripheral surface of the inner mouth portion 12a may be a protrusion portion 12d described later.

The inner container body 12 has an annular flange portion 12b that is integrally connected to the upper end of the inner opening portion 12a and extends radially outward from the upper end portion. The flange portion 12b is in contact with the upper end of the outer opening portion 11a on the lower surface thereof, and the inner opening portion 12a is positioned in the axial direction with respect to the outer opening portion 11a. The flange portion 12b is not limited to an annular shape extending over the entire circumference in the circumferential direction, and may be formed intermittently in the circumferential direction.

An inner container main body 12c is integrally connected to the lower end of the inner opening 12a. The inner container main body 12c is a portion for accommodating the content liquid filled from the inner mouth 12a, is formed in a bag shape thinner than the inner mouth 12a, and is arranged inside the outer container main body 11b to be arranged inside the outer container. The volume can be reduced and deformed inside the main body 11b. In the present embodiment, the inner container main body 12c is laminated independently of the outer container main body 11b so that the volume can be reduced and deformed. The inner container main body 12c and the outer container main body 11b may be laminated in a non-adhesive state, or may be laminated in a peelable pseudo-adhesive state. If the inner container body 12c can be configured to be deformable in a volume-reducing manner independently of the outer container body 11b, even if the outer container 11 and the inner container 12 are made of the same material, they are made of different materials. It may be composed of.

On the outer peripheral surface of the inner opening portion 12a, three protrusions 12d are provided side by side at equal intervals in the circumferential direction. Each of these protrusions 12d is formed in a rib shape having a predetermined length in the circumferential direction, and protrudes radially outward toward the inner peripheral surface of the outer opening portion 11a, and is outer at the radial outer end thereof. It is in contact with the inner peripheral surface of the mouth portion 11a. Further, the heights of protrusions of the respective protrusions 12d from the outer peripheral surface of the inner mouth portion 12a are all equal. The protrusion 12d is not limited to a rib shape having a predetermined length, and the shape thereof, such as a hemispherical shape, can be changed in various ways. Further, the three protrusions 12d may be provided so that their heights in the axial direction are different from each other.

By having the three protruding portions 12d having such a configuration, the inner opening portion 12a is reliably positioned inside the outer opening portion 11a so as to be coaxial with the outer opening portion 11a, and the outer opening portion 11a and the inner opening portion 11a and the inner opening portion 11a are reliably positioned. The outside air introduction gap 15 can be held (generated) between the mouth portion 12a and the mouth portion 12a. Further, since the outer opening portion 11a and the inner opening portion 12a can be positioned coaxially, the outside air introduction gap 15 can be configured as a cylindrical space whose radial width is uniform in the circumferential direction. .. Further, the inner opening portion 12a can be securely fixed to the inside of the outer opening portion 11a to prevent the inner opening portion 12a from rattling.

In the present embodiment, the protrusion 12d is provided on the outer peripheral surface of the inner opening 12a, but the present invention is not limited to this, and the protrusion may be provided on the inner peripheral surface of the outer opening 11a. Well, or the protrusions may be provided on both the outer peripheral surface of the inner opening portion 12a and the inner peripheral surface of the outer opening portion 11a.

Further, in the present embodiment, three rib-shaped protrusions 12d extending in the circumferential direction are provided on the outer peripheral surface of the inner opening portion 12a at equal intervals in the circumferential direction, but the present invention is limited to this. Instead, the outside air introduction gap 15 is held between the inner peripheral surface of the outer mouth portion 11a and the outer peripheral surface of the inner mouth portion 12a without dividing the outside air introduction gap 15 between the upper end and the lower end of the mouth portion 13. The number or shape of the protrusions 12d can be variously changed as long as they can be used. In this case, the plurality of protrusions 12d may be provided so that all the heights thereof are different from each other or some heights are different from each other.

In the present embodiment, the inner container body 12 is made of a synthetic resin material mainly made of polypropylene (PP).

On the outer peripheral surface of the outer opening portion 11a, an outer groove portion 16 extending from the upper end of the outer opening portion 11a to the lower side of the locking projection 11c is provided. In the present embodiment, the outer peripheral surface of the outer opening portion 11a is integrally provided with an annular convex rib 11d below the locking projection 11c, and the outer groove portion 16 extends downward from the convex rib 11d. ing. In the portion where the outer groove portion 16 is provided, the locking projection 11c and the convex rib 11d formed on the male screw are divided in the circumferential direction to form an intermittent shape. In the present embodiment, the outer groove portion 16 is formed in a groove shape having a rectangular cross section, extends straight in parallel with the axial direction of the mouth portion 13, and the groove width and groove depth are between the upper end and the lower end. Is constant. As described above, when the convex rib 11d is divided in the circumferential direction by the outer groove portion 16, the convex rib 11d is brought into contact with the inner surface of the mounting cap 3a, and the mounting cap 3a is stabilized by the convex rib 11d. May be supported.

The outer groove portion 16 may have a groove width and a groove depth that gradually change between the upper end and the lower end, and the groove width and the groove depth partially change. There may be.

An upper groove portion 17 is provided at the upper end of the outer opening portion 11a. The upper groove portion 17 is formed in a groove shape having a rectangular cross section and extends straight along the radial direction of the mouth portion 13, and the groove width and groove depth thereof are the same as the groove width and groove depth of the outer groove portion 16. It is the same. Further, the upper groove portion 17 is connected to the outer groove portion 16 at its radial outer end and is connected to the outside air introduction gap 15 at the radial inner end, so that the outside air introduction gap 15 is connected to the outer groove portion 16.

The groove width and groove depth of the upper groove portion 17 may be different from the groove width and groove depth of the outer groove portion 16. Further, the upper groove portion 17 may have a groove width and a groove depth that gradually change between the radial outer end and the radial inner end, and the groove width and the groove may be partially changed. The depth may change.

As described above, the outer port portion 11a is provided with the outer groove portion 16 and the upper groove portion 17 from a portion lower than the locking projection 11c on the outer peripheral surface of the outer port portion 11a through the upper end of the outer port portion 11a. A flow path for introducing outside air is formed so as to reach the gap 15 for introducing outside air inside the portion 11a.

The dispensing tool 3 has a head portion 3c that is vertically movablely held by a mounting cap 3a formed in a humpback tubular shape. The head portion 3c includes a nozzle 3d that serves as a discharge port for the content liquid. Further, the pump 3e is held by the mounting cap 3a. The pump 3e has a piston 3f and a cylinder 3g, and is operated by pushing down the head portion 3c to transfer the content liquid contained inside the inner container main body portion 12c to the nozzle 3d through the suction pipe 3h. It can be pumped and discharged to the outside from the nozzle 3d. When the pressing operation of the head portion 3c is released, the head portion 3c is pushed upward by the elastic force of the spring member 3i and automatically returns to the original position.

Reference numeral 18 is a blocking member that is detachably mounted between the head portion 3c and the mounting cap 3a to prevent the head portion 3c from being pushed down when not in use. The blocking member 18 is removed during use.

The dispensing tool 3 having such a configuration is attached to the mouth portion 13 by screw-connecting the mounting cap 3a to the outer mouth portion 11a. When the dispenser 3 is attached to the mouth portion 13, the opening of the mouth portion 13 is closed by the attachment cap 3a, and the outer peripheral surface of the mouth portion 13 is covered by the attachment cap 3a. At this time, the outer groove portion 16 provided in the outer opening portion 11a of the double container 2 divides the locking projection 11c and the convex rib 11d formed as male threads in the circumferential direction from the upper end to the lower end of the mouth portion 13. Since it is extended toward the end, a flow path for introducing outside air from the root portion to the upper end of the mouth portion 13 is formed by the outer groove portion 16 between the mounting cap 3a and the outer peripheral surface of the outer mouth portion 11a. Has been done. The lower end of the outer groove portion 16 communicates with the outside of the mounting cap 3a.

The configuration of the above-mentioned dispenser 3 with a pump can be changed in various ways as long as the pump 3e can be operated by pushing down the head portion 3c to dispense the content liquid from the nozzle 3d. be.

In the container 1 with a dispenser having the above configuration, after removing the blocking member 18, the head portion 3c is pushed down in the standing posture, so that the container 1 is housed in the inner container main body 12c of the inner container 12. A predetermined amount of the content liquid can be poured out from the nozzle 3d.

When the content liquid contained in the inner container main body 12c is poured out, the outer groove 16 formed on the outer peripheral surface of the outer port 11a and opened to the outside of the container 1 with the dispenser, and the outer port Since the outside air is introduced into the outside air introduction gap 15 provided between the outer opening portion 11a and the inner opening portion 12a via the upper groove portion 17 formed at the upper end of the portion 11a, the outer container main body portion By allowing outside air to be introduced between the 11b and the inner container main body 12c, the inner volume of the inner container main body 12c is reduced by the amount of the reduced content while keeping the shape of the outer container main body 11b. It can be easily reduced in volume and deformed.

As described above, in the container 1 to the double container 2 with the dispenser of the present embodiment, the outside air introduction gap 15 is provided between the outer port portion 11a and the inner port portion 12a, and the outer peripheral surface of the outer port portion 11a is provided. By providing the outer groove portion 16 and providing the upper groove portion 17 connecting the outside air introduction gap 15 and the outer groove portion 16 at the upper end of the outer mouth portion 11a, the outer side is provided with the mounting cap 3a attached to the mouth portion 13. Since the outside air is introduced between the outer container main body 11b and the inner container main body 12c through the groove 16, the upper groove 17 and the outside air introduction gap 15, the outer container body 11 and the inner container body 12 are introduced. It is not necessary to provide an outside air introduction hole in the mouth portion 13 by drilling a hole or the like to introduce the outside air between the two. Therefore, it is possible to accurately form a flow path for introducing outside air between the outer container main body 11b and the inner container main body 12c. It is possible to configure the structure so that the outside air can be reliably introduced between the outer container main body 11b and the inner container main body 12c at the time of delivery.

FIG. 4 is a half cross-sectional view of a preform according to an embodiment of the present invention. Further, FIG. 5 is a half-cross-sectional view of the outer preform body shown in FIG. 4, and FIG. 6 is a half-cross-sectional view of the inner preform body shown in FIG.

The double container 2 used for the container 1 with a dispenser can be formed by blow molding a synthetic resin preform 20 according to an embodiment of the present invention having the configuration shown in FIG. ..

The preform 20 is formed in a test tubular shape having a mouth portion 13 and is formed into a double container 2 by blow molding. Since the mouth portion 13 of the preform 20 is a portion that is not deformed by blow molding, it has the same shape as the mouth portion 13 of the double container 2. That is, the preform 20 has a portion constituting the mouth portion 13, that is, an outer mouth portion 11a, a locking protrusion 11c, a convex rib 11d, an inner mouth portion 12a, a flange portion 12b, and a protrusion 12d of the double container 2. It has the structure of the outside air introduction gap 15, the outer groove portion 16, and the upper groove portion 17 as they are. In FIGS. 4 to 6, the members corresponding to the members of the double container 2 are designated by the same reference numerals.

The preform 20 has a double structure including an outer preform body 21 and an inner preform body 22.

The outer preform body 21 has a cylindrical outer mouth portion 11a forming the outer shell of the mouth portion 13 and a bottomed cylindrical outer preform main body portion 21b connected to the lower end of the outer mouth portion 11a. .. Further, a locking projection 11c is provided integrally with the outer opening portion 11a on the outer peripheral surface of the outer opening portion 11a.

In the present embodiment, the outer preform body 21 is made of a synthetic resin material containing polyethylene terephthalate (PET) as a main material.

The inner preform body 22 has a cylindrical inner opening portion 12a arranged inside the outer opening portion 11a, and between the outer peripheral surface of the inner opening portion 12a and the inner peripheral surface of the outer opening portion 11a, the inner preform body 22 has a cylindrical inner opening portion 12a. An outside air introduction gap 15 is provided, which reaches from the upper end to the lower end of the mouth portion 13 and becomes a substantially cylindrical space.

An annular flange portion 12b extending radially outward is integrally connected to the upper end of the inner opening portion 12a. The flange portion 12b is in contact with the upper end of the outer opening portion 11a on the lower surface thereof, and the inner opening portion 12a is positioned in the axial direction with respect to the outer opening portion 11a. The flange portion 12b is not limited to an annular shape extending over the entire circumference in the circumferential direction, and may be formed intermittently in the circumferential direction.

An inner preform main body portion 22c is integrally provided at the lower end of the inner opening portion 12a. The inner preform main body 22c is formed in a bottomed tubular shape having substantially the same outer diameter as the inner opening 12a, and is arranged inside the outer preform main body 21b.

A gap similar to the outside air introduction gap 15 is provided between the inner peripheral surface of the side surface portion of the outer preform main body 21b and the outer peripheral surface of the side surface portion of the inner preform main body 22c. Further, a gap wider than the outside air introduction gap 15 is provided between the inner peripheral surface at the bottom portion of the outer preform main body 21b and the outer peripheral surface at the bottom portion of the inner preform main body 22c. By providing these gaps, the assembling property of the inner preform body 22 with respect to the outer preform body 21 can be improved. It should be noted that between the inner peripheral surface of the side surface portion of the outer preform main body 21b and the outer peripheral surface of the side surface portion of the inner preform main body 22c, and the inner peripheral surface and inner surface of the bottom portion of the outer preform main body 21b. It is also possible to provide a configuration in which no gap is provided between the bottom portion of the reform main body portion 22c and the outer peripheral surface.

On the outer peripheral surface of the inner opening portion 12a, three protrusions 12d are provided side by side at equal intervals in the circumferential direction. Each of these protrusions 12d is formed in a rib shape having a predetermined length in the circumferential direction and protrudes toward the inner peripheral surface of the outer mouth portion 11a, and at the radial outer end thereof, the outer mouth portion 11a It is in contact with the inner peripheral surface. Here, the protrusion heights of the inner mouth portions 12a of the respective protrusions 12d from the outer peripheral surface are all equal. As a result, the inner preform body 22 is held so as to be coaxial with the outer preform body 21, and a gap having a uniform spacing in the circumferential direction is provided between the inner preform body 22 and the outer preform body 21. Has been done.

In the present embodiment, the inner preform body 22 is made of a synthetic resin material mainly made of polypropylene (PP).

On the outer peripheral surface of the outer opening portion 11a, an outer groove portion 16 extending from the upper end of the outer opening portion 11a to the lower side of the locking projection 11c is provided. In the present embodiment, the outer peripheral surface of the outer opening portion 11a is integrally provided with an annular convex rib 11d below the locking projection 11c, and the outer groove portion 16 extends downward from the convex rib 11d. There is.

Further, an upper groove portion 17 is provided at the upper end of the outer opening portion 11a. The upper groove portion 17 is connected to the outer groove portion 16 at its radial outer end, is connected to the outside air introduction gap 15 at the radial inner end, and is connected to the outer groove portion 16.

As described above, also in the preform 20, the outer opening portion 11a has the outer opening portion 11a from the portion lower than the locking projection 11c on the outer peripheral surface of the outer opening portion 11a by the outer groove portion 16 and the upper groove portion 17. A flow path for introducing outside air is formed, which reaches the gap 15 for introducing outside air inside the outer port portion 11a through the upper end of the above.

In the preform 20 having the above configuration, generally, the outer preform main body 21b and the inner preform main body 22c that have been preheated to a stretchable temperature are arranged in a mold, and the inner preform body is formed from the mouth portion 13 thereof. Since the inside of 22 is filled with a pressurized medium (pressurized air or pressurized liquid) and blow-molded, the shape of the mouth portion 13 does not change (without being stretched), and the outer preform main body portion 21b And only the inner preform main body 22c is blow-molded by being stretched into a shape along the blow-molding die by the pressure of the pressure medium. At this time, the outer preform main body 21b and the inner preform main body 22c are stretched at a predetermined stretching ratio, so that the outer preform main body 21b is formed in the outer container main body 11b, and the inner preform main body 22c is formed. Is formed in a bag shape that can be reduced in volume and deformable, and is composed of an inner container main body 12c that is arranged on the inner surface of the outer container main body 11b.

In this way, the outer container main body 11b and the inner container main body are simply blow-molded by the preform 20 formed by combining the individually formed outer preform body 21 and the inner preform body 22. A double container 2 having a flow path through which outside air can be introduced can be formed between the 12c and the 12c.

It goes without saying that the present invention is not limited to the above-described embodiment and can be variously modified without departing from the gist thereof.

For example, in the above-described embodiment, the outer container body 11 to the outer preform body 21 are made of polyethylene terephthalate, and the inner container body 12 to the inner preform body 22 are made of polypropylene. If the portion 12c can be configured so as to be flexible in volume reduction and deformation inside the outer container main body portion 11b, the types of synthetic resin materials constituting these can be variously changed.

Further, in the above-described embodiment, the pump type is used as the dispenser 3, but the outer container main body 11b of the outer container 11 can be squeezed (pressed) and restored by releasing the squeeze. It can also be configured to have sex. In this case, for example, as a pouring tool 3, as shown as a modified example in FIG. 7, a pouring outlet (which is provided on the mounting cap 3a and contains the content liquid contained inside the inner container main body 12c is poured out to the outside). (Not shown), a check valve for content liquid (not shown) provided at the spout, and a check valve (not shown) attached to the inner peripheral edge of the lower end of the mounting cap 3a, below the lower end of the mounting cap 3a and the lower end of the outer groove portion 16. It is also possible to use one configured as an injection cap provided with a check valve 30 for an outside air introduction path that opens and closes a gap between the outer port portion 11a and the outer peripheral surface on the side. In this case, when the outer container main body 11b is squeezed and the content liquid is poured out from the spout, the check valve 30 for the outside air introduction path is used to lower the lower end of the mounting cap 3a and the lower end of the outer groove 16. The gap between the outer port 11a and the outer peripheral surface is closed to prevent the air between the outer container main body 11b and the inner container main body 12c from being discharged to the outside, and the content liquid can be easily poured by the squeeze. You can get it out. On the other hand, when the squeeze is released and the outer container main body 11b is restored to its original shape, the check valve 30 for the outside air introduction path is opened and the outer port is located below the lower end of the mounting cap 3a and the lower end of the outer groove 16. Since outside air can be introduced between the outer container main body 11b and the inner container main body 12c through the gap between the outer peripheral surface of the portion 11a, the outer groove 16, the upper groove 17, and the outside air introduction gap 15, the inner container can be introduced. The volume of the main body 12c can be reliably reduced and deformed to suppress the deformation of the outer container main body 11b or the introduction of outside air into the inner container main body 12c.

1 Container with dispenser 2 Double container 3 Noter 3a Mounting cap 3b Female screw 3c Head 3d Nozzle 3e Pump 3f Piston 3g Cylinder 3h Suction pipe 3i Spring member 11 Outer container 11a Outer port 11b Outer container body 11c Locking Protrusion 11d Convex rib 12 Inner container body 12a Inner mouth 12b Flange 12c Inner container body 12d Protrusion 13 Mouth 14 Body 15 Outside air introduction gap 16 Outer groove 17 Upper groove 18 Blocking member 20 Preform 21 Outer pump Reform body 21b Outer preform body 22 Inner preform body 22c Inner preform body 30 Check valve for outside air introduction path

Claims (9)

A double container made of synthetic resin that is used with a dispenser attached to the mouth.
The outer peripheral surface of the outer mouth portion for locking the tubular outer mouth portion forming the outer shell of the mouth portion, the outer container main body portion connected to the lower end of the outer mouth portion, and the mounting cap of the dispenser. An outer container body provided with a locking protrusion provided on the
A tubular inner opening portion arranged inside the outer opening portion, a flange portion extending radially outward from the inner opening portion and abutting on the upper end of the outer opening portion, and a lower end portion of the inner opening portion. An inner container body provided with an inner container body portion which is arranged inside the outer container main body portion and is capable of reducing the volume and deforming independently of the outer container main body portion.
A gap for introducing outside air is provided on at least one of the inner peripheral surface of the outer mouth portion and the outer peripheral surface of the inner mouth portion so as to project toward the other. With multiple protrusions to hold
An outer groove portion provided on the outer peripheral surface of the outer opening portion and extending from the upper end of the outer opening portion to a lower side than the locking projection.
A double container provided at the upper end of the outer mouth portion and having an upper groove portion that connects the outside air introduction gap to the outer groove portion. The double container according to claim 1, wherein three protrusions are provided on the outer peripheral surface of the inner mouth portion at equal intervals in the circumferential direction. The double container according to claim 2, wherein the heights of protrusions from the outer peripheral surfaces of the inner mouths of the three protrusions are all equal. The double container according to any one of claims 1 to 3 and the double container.
A container with a dispenser, which comprises the dispenser attached to the mouth portion. The dispenser has a head portion provided with a nozzle and is held in the mounting cap so as to be vertically movable, and the nozzle portion operates by pushing down the head portion to contain the content liquid contained inside the inner container main body portion. The container with a pouring tool according to claim 4, further comprising a pump for pouring from. The contents of the pouring tool, which is provided on the mounting cap and opens and closes the communication between the pouring port for pouring out the content liquid contained inside the inner container main body and the pouring port and the inner container main body. 4. A check valve for an outside air introduction path, which comprises a check valve for liquid and a check valve for an outside air introduction path that opens and closes a gap between the lower end of the mounting cap and the outer peripheral surface of the outer mouth portion below the lower end of the outer groove portion. Container with dispenser described in. A preform made of synthetic resin that is formed into a test tube with a mouth and is used for blow molding.
The outer peripheral surface of the outer mouth portion for locking the tubular outer mouth portion forming the outer shell of the mouth portion, the outer preform main body portion connected to the lower end of the outer mouth portion, and the mounting cap of the dispenser. An outer preform body with a locking projection provided on the
A tubular inner opening portion arranged inside the outer opening portion, a flange portion extending radially outward from the inner opening portion and abutting on the upper end of the outer opening portion, and a lower end portion of the inner opening portion. An inner preform body provided with an inner preform main body arranged inside the outer preform main body, and an inner preform body provided with
A gap for introducing outside air is provided on at least one of the inner peripheral surface of the outer mouth portion and the outer peripheral surface of the inner mouth portion so as to project toward the other. With multiple protrusions to hold
An outer groove portion provided on the outer peripheral surface of the outer opening portion and extending from the upper end of the outer opening portion to a lower side than the locking projection.
A preform provided at the upper end of the outer mouth portion and having an upper groove portion that connects the outside air introduction gap to the outer groove portion. The preform according to claim 7, wherein three protrusions are provided on the outer peripheral surface of the inner opening at equal intervals in the circumferential direction. The preform according to claim 8, wherein the heights of protrusions from the outer peripheral surfaces of the inner openings of the three protrusions are all equal.

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