JP4149819B2 - Liquid composite container - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a liquid composite container excellent in aesthetics suitable as a liquid cosmetic container and a container with an airless pump.
[0002]
[Prior art]
Conventionally, as a composite container for liquid, for example, as disclosed in Japanese Utility Model Publication No. 6-80668, a composite container in which a thin plastic bottle is inserted into an outer box is often used in order to achieve weight reduction and aesthetics. Are known.
[0003]
This type of liquid composite container reduces the amount of plastic material used by forming a thin plastic bottle as the inner container. However, thin plastic bottles lack rigidity and are not self-supporting, and can be further decorated. Because of its poor properties, it is a self-supporting composite container for storing liquid by assembling an outer package made of paper or synthetic resin to a thin-walled bottle.
[0004]
[Problems to be solved by the invention]
Although the conventional composite container for liquids using an exterior body can be decorated such as printing on the exterior body and is self-supporting, it has a sense of unity between the exterior body and the neck of the bottle inserted into the exterior body. In addition to being lacking, the texture is low, and the design of the exterior body is limited to a box shape, making it difficult to adopt as a beautiful liquid cosmetic container.
[0005]
In addition, the above-mentioned composite container for liquid does not have a technical idea of assembling an airless pump and contracting and reducing the volume of the inner container according to the discharge amount of the content liquid, so it can be suitably used as a container with an airless pump. I could not.
[0006]
The present invention has been made in view of the above problems, and it is an object of the present invention to provide a lightweight and beautiful composite container suitable for storing liquid cosmetics and a container with an airless pump.
[0007]
[Means for Solving the Problems]
The present invention vertically hangs the outer body portion of the lower end open from the outer peripheral edge of the shoulder portion erected neck, and suspends a guide wall along the upper inner peripheral surface of the outer body portion on the lower surface of the shoulder portion, An exterior body formed by engraving an annular recess on the lower surface of the shoulder between the outer body and the guide wall, and a dish-shaped bottom member on the inner peripheral surface of the lower end of the inner body made of a tubular film And an inner container formed by integrally coupling an upper end outer peripheral surface of the inner body portion with a mouth member projecting an annular convex portion that fits into the annular recess. The inner container was fitted and the annular recess and the annular projection were welded.
[0008]
By adopting the above configuration, it is possible to obtain a light-weight composite bottle for storing liquids with a high texture, and to form an inner container into a flexible container that easily contracts by negative pressure, and an airless pump is attached to form an airless It can be used as a container with a pump.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the composite container for liquid according to the present invention will be described in detail with reference to the drawings.
[0010]
1 to 3 show an embodiment of the present invention, a bottomless bottle-shaped exterior body 1 and a bottomed cylinder that is inserted into the exterior body 1 and integrated with the exterior body 1. It is comprised from the inner container 10 of a shape.
[0011]
As shown in FIG. 2A, the exterior body 1 includes a neck portion 2 in which a male screw 3 is screwed on an outer peripheral surface, a shoulder portion 4 in which the neck portion 2 is erected, and an outer peripheral edge of the shoulder portion 4. The outer trunk portion 5 is provided with an open lower end and a guide wall 6 that is suspended from the lower surface of the shoulder portion 4 along the upper inner peripheral surface of the outer trunk portion 5. Note that the fitting means with the lid or pump attached to the neck 2 is not limited to screw fitting, but may be fitting means such as undercut.
[0012]
Further, an annular recess 7 is formed on the lower surface of the shoulder 4 located between the outer body 5 and the guide wall 6, and the annular recess 7 is shown in FIG. 2 (b). In addition, ultrasonic ribs 8 are projected.
[0013]
The exterior body 1 is molded by an injection molding method using a rigid thermoplastic resin such as SAN, PET, PS, PMMA, ABS, PP, PE or the like. Accordingly, a self-supporting exterior body 1 having a uniform thickness can be obtained. In addition, the outer peripheral surface of the exterior body 1 is decorated with characters and patterns using a decoration technique such as hot stamping, printing, and transfer.
[0014]
As shown in FIG. 3, the inner container 10 is provided with an inner body portion 11 made of a tubular film, and a lower peripheral wall 14 that is integrally coupled to the inner periphery of the lower end of the inner body portion 11 and is formed on the outer periphery of the bottom plate 13. The dish-shaped bottom member 12 and a ring-shaped mouth member 15 that is integrally coupled to the outer periphery of the upper end of the inner body portion 11 and has an annular convex portion 17 projecting from the upper surface of the flange portion 16 are configured. Yes.
[0015]
The inner body portion 11 is a cylindrical body made of a film obtained by rounding a laminated film cut into a rectangular shape and joining the end portions thereof. A synthetic resin film having a high barrier property is selected as an intermediate layer of the laminated film. For the outer layer, a synthetic resin film having good weldability to the bottom member 12 and the mouth member 15 is selected. The film material constituting the laminate film is preferably a polyethylene film, a polyester film, or a polypropylene film, and a film subjected to metal vapor deposition or silica vapor deposition may be used for the intermediate layer to increase the barrier property. Laminate films are obtained by laminating these films.
[0016]
Moreover, when using a composite container as a container which attaches the airless pump 21 as shown in FIG. 4, it is preferable to select a highly flexible film material for the inner trunk portion 11. In addition, when used as a normal liquid storage bottle with a screw cap 21 screwed onto the male screw 3 of the exterior body 1 shown in FIG. preferable.
[0017]
In addition, the outer surface of the inner body portion 11 is decorated with characters, patterns, and colors by printing or transferring, and the exterior body 1 is molded using a transparent synthetic resin, and the transparent exterior body 1 is seen through. By looking at the inner container 10, it is possible to enhance the beauty and texture.
[0018]
The integral connection of the mouth member 15 and the bottom member 12 to the inner body 11 is preferably performed by a heat welding method or an insert molding method. That is, in the heat welding method, the mouth member 15 and the bottom member 12 are individually formed, the bottom member 12 is welded to the inner peripheral surface of the lower end portion of the inner body portion 11, and the mouth member 15 is attached to the outer periphery of the upper end portion of the inner body portion 11. Bonded together by welding. Further, in the insert molding method, the inner body portion 11 is inserted into a mold for molding the mouth member 15 and the bottom member 12, and the mouth member 15 and the bottom member 12 are molded by the injection molding method and simultaneously coupled.
[0019]
To assemble the outer body 1 and the inner container 10 together, the inner container 10 is inserted from the lower end opening 5a of the outer body 1, and an ultrasonic jig is inserted into the gap 23 between the outer body part 5 and the inner body part 11, The annular convex portion 17 of the mouth member 15 of the inner container 10 is fitted into the annular concave portion 7 of the outer package 1, and the tip of the ultrasonic jig is brought into contact with the flange portion 16 of the mouth member 15 to be welded by an ultrasonic welding method. .
[0020]
This assembly work is easy to insert the ultrasonic jig because the inner container 10 inserted into the exterior body 1 is maintained in a cylindrical shape, and since it is welded by the flange portion 16, there is little loss of vibration and electric transport, Since the annular convex part 17 is fitted and welded to the annular concave part 7, the molten resin fills the bottleneck and is surely welded over the entire circumference of the fitting part, so that a liquid-tight bottle can be obtained.
[0021]
The composite container according to the present embodiment can prevent deformation of the inner container 10 even when the exterior body 1 is left open, and has a self-supporting property capable of being filled with liquid, and can give a beautiful appearance as a liquid cosmetic container. As shown in FIG. 4, a bottom cover 22 may be attached as necessary.
[0022]
Moreover, when using as a container with an airless pump, since a highly flexible laminate film is used for the inner body part 11 of the inner container 10, if the stored liquid is discharged by the operation of the airless pump 20, the negative pressure in the inner container 10 is reduced. Due to the pressure, the inner body portion 11 contracts very easily according to the discharge amount.
[0023]
Therefore, the operation of the airless pump 20 is smoothly performed, and the inner body portion 11 can be flexibly contracted to discharge the stored liquid without waste.
[0024]
【The invention's effect】
As described above, the present invention implemented in the form as described has the following effects.
[0025]
The inner container with the inner body of the tubular film is welded in a liquid-tight manner to the exterior body with the outer body suspended from the outer peripheral edge of the shoulder with the neck upright. It becomes a complex bottle with a high texture and can be used as a beautiful liquid cosmetic container.
[0026]
Further, by using a highly flexible film for the inner barrel portion of the inner container, the inner barrel portion can be easily contracted by a negative pressure, so that it can be suitably used as a container with an airless pump.
[Brief description of the drawings]
FIG. 1 is a front half sectional view showing a preferred embodiment of a composite container for liquid according to the present invention.
2 shows an exterior body in the container of FIG. 1, (a) is a front half sectional view, and (b) is an enlarged sectional view of a main part.
FIG. 3 is a front half sectional view showing an inner container in the container of FIG. 1;
FIG. 4 is a front half sectional view showing an example of use of the container of FIG.
FIG. 5 is a cross-sectional view showing a screw cap used in the container of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Exterior body, 2 Neck part, 4 Shoulder part, 5 Outer trunk part, 6 Guide wall, 7 Annular recessed part, 10 Inner container, 11 Inner body part, 12 Bottom member, 15 Mouth member, 17 Annular convex part

Claims (1)

An outer trunk portion having an open lower end is suspended from the outer peripheral edge of the shoulder portion where the neck portion is erected, and a guide wall along the upper inner peripheral surface of the outer trunk portion is suspended on the lower surface of the shoulder portion, and the outer trunk portion An outer body formed by engraving an annular recess on the lower surface of the shoulder between the guide wall and a dish-shaped bottom member integrally joined to the inner peripheral surface of the lower end portion of the inner body made of a cylindrical film And an inner container formed by integrally connecting a mouth member projecting an annular convex part to be fitted into the annular concave part to the outer peripheral surface of the upper end part of the inner body part, and fitting the inner container into the outer body. A liquid composite container, wherein the annular concave portion and the annular convex portion are welded to each other.

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