JP3379770B2 - Composite container - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to advantages such as molding accuracy, strength and processing characteristics as an injection molded product, printing effect as a paper container, light weight, and easy incineration. More particularly, the present invention relates to a composite container provided with a pump mechanism for discharging a liquid stored in the container. [0002] Conventionally, a composite container in which a blank plate and a thermoplastic resin are integrally formed, a so-called pillar container, has been used. [0003] In general, a pillared container is formed by arranging a blank plate made of a laminated sheet material in which paper and resin are laminated in a cylindrical shape in an injection molding die, and joining the ends of the blank plate to each other. A composite container formed by integrally injecting a thermoplastic resin into an open end or the like while the blank plate is held in a container shape by a resin holding frame. Such a pillared container has both advantages as an injection-molded product and an advantage as a paper container, and is widely used as a container for storing various products such as soft drinks, sake, powder detergents, aromatics, and liquid foods. Used. On the other hand, for example, a container provided with a pump mechanism for discharging a liquid such as shampoo stored in the container is generally formed by blow molding or the like. [0005] However, the bottom of such a blow container is flat, or the shape of the periphery of the bottom is lower in position than in the center of the bottom. In addition, there is a disadvantage that the final liquid in the container remains around the bottom of the container and is not poured out by the pump mechanism. The present invention has been made in view of such circumstances, and has as its object the advantages of molding accuracy, strength and processing characteristics as an injection molded product, the printing effect as a paper container, and light weight. Another object of the present invention is to provide a composite container which is excellent in the ability to pour out the remaining liquid in the container while utilizing the characteristics of the composite container having advantages such as easy incineration. [0007] In order to achieve such an object, the present invention comprises a body, a bottom, and an upper block,
At least the body is integrally formed by injecting a thermoplastic resin into an injection mold in which a blank plate is previously arranged, and the upper closed portion is poured with a liquid stored in a container. A pump mechanism member having a tube hanging down to the vicinity of the bottom portion, the bottom portion having a liquid storage portion provided for collecting the final remaining liquid of the liquid stored in the container. The tube was set so that the lowermost end of the tube was immersed. [0008] The composite container of the present invention has, at the bottom thereof, a liquid reservoir provided for collecting the final residual liquid of the liquid stored in the container. Collected and sucked up by the immersed tube. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an example of the composite container of the present invention, and FIG. 2 is a view before assembling the composite container shown in FIG.
It is sectional drawing in the II-II line. In FIGS. 1 and 2, the composite container 1 is a so-called pillared container including a body portion 2, a bottom portion 6, and an upper closing portion 9. The body portion 2 of the composite container 1 is formed by injecting a thermoplastic resin into a joining portion where a blank plate 3 held in a cylindrical shape and ends 3a of the blank plate 3 are joined. It has a pillar portion 4 and a flange portion 5 formed by injecting a thermoplastic resin into an open end 3b below the blank plate 3 held in a cylindrical shape. Further, the upper closing portion 9 has a shoulder portion 10 and a threaded opening portion 11 protruding substantially at the center of the shoulder portion 10.
And a pump mechanism member 20 fixed to the opening 11. The pump mechanism member 20 is provided for pouring out the liquid stored in the container. The member 20 is capable of reciprocating up and down with a fixing portion 21 for fixing to the opening 11. A pumping member 22 and a tube 24 connected thereto and hanging down to near the bottom of the container. On the other hand, the bottom portion 6 comprises a bottom blank plate 8 and a flange portion 7 formed of a thermoplastic resin around the bottom portion, as shown in detail in FIG.
One formed separately from the above is taken as an example. The flange portion 7 is fixed to the inner peripheral surface of the flange portion 5 of the body portion 2 to be integrated with the body portion 2. The bottom 6 is provided with a liquid reservoir G provided for collecting the final remaining liquid of the liquid stored in the container at the center, and the lowermost end 24a of the tube 24 is immersed in the liquid reservoir G. It is installed to be. The liquid storage portion G shown in FIG. 2 is a curved portion whose inclination decreases as it goes to the center of the bottom portion. This is a blank portion 8 having a multi-layered structure made of different materials. It is formed using the difference in shrinkage. As the blank plate 8 having a multilayer structure, for example,
The case of two layers shown in FIGS. 3 and 4 will be described as an example. As shown in the partial enlarged view of FIG. 4, the inner surface layer 8a is made of resin, and the outer surface layer 8b is made of paper, aluminum, or a resin (such as PET) having a smaller heat shrinkage than the resin of the inner surface layer 8a. Then, when the injection molding resin is injected to form the outer flange 7 around the blank plate 8, the temperature of the entire blank plate once rises and then is cooled. At this time, due to the difference in thermal shrinkage of each layer, the blank plate is pulled by the resin layer 8a having high shrinkage, and the center of the blank plate is recessed downward, so that the liquid reservoir G is formed. The blank plate 8 is shown in FIG. 3 before and after the injection molding resin is injected around the blank plate 8.
A plane specified by the position L shown in (b) is formed. The liquid reservoir G and the lowermost end 24 of the tube 24 to be immersed.
FIG. 4B shows the relationship with a. FIG. 5 shows a bottom portion 6 having another shape, which is a concave portion 8 serving as a liquid reservoir portion G formed in the central portion.
1, a flat portion 82 connected to the concave portion 81 and having a constant gradient for flowing a fluid into the concave portion 81;
It has a flange portion 71 connected to the flat portion 82. These are integrally formed of the same resin by injection molding or the like. In addition, the size of the concave portion 81 is
Is set to such an extent that the lowermost end 24a of the can be inserted. FIG. 6 shows another bottom portion 6. This is basically the same as the shape shown in FIGS. 2 to 4, except that it is integrally formed of the same resin by injection molding or the like without using a blank plate. The bottom flange portion 7 and the body flange portion 5 are fixed to the inner peripheral surface by screwing them together and screwing them together, using a heat sealing method, an ultrasonic sealing method, or the like. The bonding may be performed by various methods. The composite container 1 as described above includes a blank plate 3
Is previously arranged between the core of the injection mold and the female mold, and then the thermoplastic resin is injected to thereby form the pillar portion 4, the flange portion 5, the shoulder portion 10, and the threaded opening. At this time, the blank plate 3 held in a cylindrical shape has pillars 4, flanges 5, shoulders 5 at ends 3a, 3a, a lower open end 3b, and an upper open end 3c. It is fused and integrated with the thermoplastic resin constituting 10. At this time, it is preferable that the blank plate 3 be wound around a core in advance and bend-folded. Also, the bottom 6
Also, the blank plate 8 for the bottom part is previously arranged in an injection molding die, and then the thermoplastic resin is injected to form the blank plate 8.
The flange portion 7 can be integrally formed of a thermoplastic resin around the periphery. It is preferable that the pillar portion 4 formed by injection of the thermoplastic resin is not easily confirmed from the outside of the composite container 1 in terms of appearance. It may be reduced as much as possible. Also,
As shown in FIG. 2, ribs 4
a may be protruded. By protruding the ribs 4a in this manner, stacking between the body parts is prevented when the body parts 2 before the bottom part 6 is integrated are stored and transported, and subsequent separation is easy. Becomes As described above, the thermoplastic resin which is integrated with the blank plate 3 and the blank plate 8 to constitute the composite container 1 is not particularly limited, but the thermoplastic resin layer on the innermost surface of the blank plate 3 Synthetic thermoplastic resins are preferred. As the blank plate 3, for example, a three-layer structure of polyethylene (PE) / paper / polyethylene (PE), polypropylene (PP)
/ PE / paper / PE / polypropylene (PP) 5-layer structure, PE / paper / adhesive layer / aluminum (Al) layer / P
E has a five-layer structure and the like. Then, the innermost PE layer or PP layer of the blank plate is integrated by thermal fusion with the injected thermoplastic resin, and the strength of the molded container is high. The thickness of the blank plate 3 is preferably about 300 to 600 μm. Incidentally, the shape of the composite container of the present invention is not limited to the above-described example, but may be various shapes. For example, as shown in FIG.
The composite container 31 having the shape shown in FIG. 8 may be formed by using a blank plate 32 composed of the a and 33b and the upper closed part forming part. In the composite container 31, a pillar portion 36 made of a thermoplastic resin is formed at a joint portion of the blank plate 32. An upper closing portion 37 formed by the upper closing portion forming portion 34 of the blank plate 32 is formed with an upper closing edge 38, and a lower flange portion 39 is formed below the blank plate 32. I have. In addition, a threaded opening 40 is integrally formed with a mouth 35 formed in the upper blocking portion forming portion 34 of the blank plate 32. Alternatively, the threaded opening 40 may be separately formed and fixed to the mouth 35. A bottom member formed separately from the container is adhered to the lower flange portion 39. As a means for integrating the body 2 and the bottom 6, the ultrasonic sealing method can be used as described above. In this case, as shown in FIG. Can be provided with a convex portion 5a on the lower end surface of the. Since such protrusions 5a are selectively melted by ultrasonic waves, heat sealing can be quickly and reliably performed. Also, in order to prevent the molten resin from flowing out from between the flange portion 5 and the bottom portion 6,
An L-shaped edge 5b may be provided on the outer edge of the flange 5 as in the illustrated example. The shape of the convex portion 5a may be any shape such as a ring shape or a protrusion shape such as a cone, and the height of the convex portion 5a is 0.1 to 0.5 mm.
Is preferably in the range of 60 to 120 °. or,
The above-described convex portion may be provided on the flange portion 7 side of the bottom portion 6, and in this case, the lower end surface of the flange portion 5 has a flat shape. As described in detail above, the bottom of the composite container of the present invention is provided with a liquid reservoir provided for collecting the final remaining liquid of the liquid stored in the container. Chu in the reservoir
Since the bottom end of the tube is immersed, the advantages such as molding accuracy, strength and processing characteristics as an injection molded product, and the advantages such as printing effect, light weight, and easy incineration as a paper container are obtained. In addition to this, it has an effect of being excellent in pouring out the remaining liquid in the container.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an example of the composite container of the present invention. FIG. 2 is a sectional view of the composite container shown in FIG. 1 taken along the line II-II before assembly. 3A is a plan view of a bottom portion used in the composite container of the present invention, and FIG. 3B is a half-sectional view of FIG. FIG. 4 is a partially enlarged sectional view of a portion A in FIG. 3 (b). FIG. 5A is a plan view of another bottom used in the composite container of the present invention, and FIG. 5B is a half-sectional view of FIG. FIG. 6 (a) is a half sectional view of another bottom used in the composite container of the present invention. FIG. 7 is a plan view of a blank plate used in another example of the composite container of the present invention. FIG. 8 is a perspective view showing another example of the composite container of the present invention. FIG. 9 is a cross-sectional view showing an example of integration of the body and bottom of the composite container of the present invention. [Description of Signs] 1 ... Composite container 2 ... Body 3 ... Blank plate 4 ... Pillar 6 ... Bottom 20 ... Pump mechanism member G ... Liquid reservoir

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuko Yamase 1-1-1 Ichigaya-Kaga-cho, Shinjuku-ku, Tokyo Within Dai Nippon Printing Co., Ltd. (72) Inventor ▲ Yoshio Kawakawa Miyoshi-cho, Iruma-gun, Saitama 402, Takeyamazawa Shinkai, Nakayama Kogyo Co., Ltd. (72) Inventor Tetsuya Oshiro 402, Takemazawa, Shinmacho, Iruma-gun, Saitama, Japan Nakayama Kogyo Co., Ltd. (56) References Jikai Sho 61-156625 (JP) , U) Japanese Utility Model Application Hei 1-104318 (JP, U) Japanese Utility Model Application Hei 4-50686 (JP, U) Japanese Patent Publication No. 59-4501 (JP, B2) (58) Fields surveyed (Int. Cl. ⁷ , DB) Name) B29C 45/00-45/84

Claims (1)

(57) [Claims 1] A body, a bottom, and an upper closing part are provided, and at least the body is provided with a blank plate in advance.
Injection molding is performed by injection of thermoplastic resin
Pour the liquid that has been molded and stored in the container into the upper closure
Pump with a tube hanging down to the bottom to close
A mechanism member, and the bottom collects a final residual liquid of the liquid stored in the container.
The liquid reservoir is provided for
The lower end of the probe is immersed, and the liquid reservoir is formed by a blank plate having a multilayer structure made of different materials.
Bay formed and slopes down toward the center of the bottom
This is a curved part, and this curved part
That the heat shrinkage of each layer
Features a composite container.