JP5132931B2 - Composite container - Google Patents

Description

The present invention relates to a composite container.

  Conventionally, in packaging containers that contain liquid foods such as milk and soft drinks as contents, the top of the packaging container body is formed by injection molding, and has a lid (lid) that forms the top wall, that is, A composite container is provided.

  In manufacturing this type of composite container, it has a laminated structure such as a paper base material, a resin film, etc., and is made of a plate-like material composed of a packaging material for one composite container formed by cutting into a predetermined shape in advance. Blanks are sealed in a vertical direction to form a cylindrical carton, and the cylindrical carton is set in a filling machine. At one end of the cylindrical carton, a cover body is integrally and liquid-tightly formed by injection molding, and a carton having an opening at the bottom, that is, a carton with a cover body is formed. Therefore, one end of the cylindrical carton is set so as to face the cavity space of the mold apparatus, and the melted resin is filled into the cavity space.

Subsequently, the carton with a lid is inserted into a bucket of an endless conveyor and is intermittently conveyed in an inverted state, and after the liquid food is filled through the opening of the bottom, the bottom is folded. And the inside of the composite container is sealed (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-278903

  However, in the conventional composite container, the lid is formed by molding a resin, whereas the portion other than the lid, that is, the carton portion is formed by the packaging material. If the composite container is discarded as it is after drinking, it becomes difficult to recycle the material.

  Therefore, it is conceivable to separate the lid body and the carton portion and discard them. However, the lid body is formed integrally with the upper edge of the carton portion by injection molding, so it is relatively soft. The lid part is cut with scissors or the like to separate the lid and the carton part and discard them.

The present invention is to solve the problems of the conventional composite container, an object to provide a composite container which can be easily separated from the lid and the carton portion.

  Therefore, in the composite container of the present invention, a carton portion that is formed of a packaging material, includes four side walls, and forms a box-like body in which a ridge line is formed between the side walls, and a resin, and is formed on the carton portion. A lid integrally formed at the edge.

  And, in the vicinity of the lid on the upper edge of the carton part, a rupture portion is formed over the four side walls in the circumferential direction, and on the two side walls sandwiching a predetermined ridge line, a point below the rupture portion on the ridge line, A fold line connecting the points on the fracture portion is formed so that the side wall is bent into a triangular shape.

  According to the present invention, in the composite container, a carton portion that is formed of a packaging material, includes four side walls, and forms a box-like body in which a ridge line is formed between the side walls, and a resin, and is formed on the carton portion. A lid integrally formed at the edge.

  And, in the vicinity of the lid on the upper edge of the carton part, a rupture portion is formed over the four side walls in the circumferential direction, and on the two side walls sandwiching a predetermined ridge line, a point below the rupture portion on the ridge line, A fold line connecting the points on the fracture portion is formed so that the side wall is bent into a triangular shape.

  In this case, since the fracture portion is formed over the four side walls in the circumferential direction in the vicinity of the upper edge of the carton portion, the lid body and the carton portion can be easily separated.

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

FIG. 1 is a perspective view of a composite container in the form of a technique that serves as a premise for explaining the present invention.

  In the figure, 15 is a composite container, 21 is a carton part formed of a packaging material, 22 is a lid attached to the upper edge of the carton part 21 and made of resin and integrally formed with the carton part 21 by injection molding. The lid 22 covers and closes the carton portion 21 and seals the composite container 15. The carton portion 21 is composed of four side walls m1 to m4 and a bottom wall b1, and constitutes a box-like body whose upper end is opened. The lid 22 includes a collar 27 extending upward from the upper edge of each of the side walls m1 to m4, and a cap 28 that covers and closes the upper end of the collar 27. The collar 27 includes a pyramid portion 45 extending obliquely from the upper edge of each of the side walls m1 to m4, and a cylindrical portion 46 extending upward from the pyramid portion 45. The cap 28 is connected to the cylindrical portion 46 via a thin portion (not shown), and when a user pulls up a handle portion (not shown) formed on the cap 28, the thin portion is broken and a spout (not shown) is formed. It is formed. In this way, the composite container 15 can be opened.

  The packaging material is a paper base material, a first resin film made of a resin such as a polyethylene resin that is coated on the paper base material to form an outermost layer, and a polyethylene that is coated on the paper base material to form an innermost layer. It has a laminate structure including a second resin film made of a resin such as a resin, and, if necessary, is made of an aluminum foil (fog), a gas barrier resin, and the like. It is formed adjacent to the material.

In the form of the present technology , the carton portion 21 is formed of a rectangular tube having a quadrangular cross section, but the cross section can be formed in an arbitrary shape such as a cylinder or a polygon. Further, in the embodiment of the present technology , the lid body 22 is molded in a completely integrated manner in advance, but the collar and the cap can be molded separately. In that case, a male screw is formed on the outer peripheral surface of the cylindrical portion of the collar, and a female screw is formed on the inner peripheral surface of the cap, and the collar and the cap can be attached and detached by screwing the male screw and the female screw together.

  By the way, in the composite container 15 having the above-described configuration, in particular, the resin constituting the lid 22 is coated in the vicinity of the upper edge of the carton portion 21 so that the lid 22 and the carton portion 21 can be easily separated. A broken portion p <b> 1 is formed along the circumferential direction of the carton portion 21 at the upper edge of the portion that has not been formed. The broken portion p1 is formed by making a cut such as a perforation line, a half cut line, or a weak line in the paper base at the stage of manufacturing the packaging material. In this case, the rupture portion p1 can be formed by penetrating the paper base material such as perforations, but also in the thickness direction of the paper base material such as a half-cut line or a weak line. It can be formed by making a cut in a part.

  Next, the manufacturing apparatus and manufacturing method of the composite container 15 will be described.

Figure 2 is a perspective view showing an apparatus for manufacturing a composite container in premise technology serving the form of description of the present invention, FIG. 3 is a conceptual diagram illustrating a method of manufacturing a composite container in the form of technology underlying the description of the present invention is there.

  In the drawing, 11 is a manufacturing apparatus, and the manufacturing apparatus 11 includes two independent first and second filling lines 12 and 13, and in each of the first and second filling lines 12 and 13, For example, two types of composite containers 15 and 16 are produced based on the set reels R1 and R2. In this case, each of the composite containers 15 and 16 has a different size in the vertical direction, and only the amount of liquid food such as milk and soft drinks stored as the contents is different. Therefore, the composite containers 15 and 16 are mainly combined in the first filling line 12. The case where the container 15 is manufactured will be described, and the case where the packaging container 16 is manufactured in the second filling line 13 will be supplementarily described as necessary.

  By the way, in each of the first and second filling lines 12 and 13, two reels R1 and R2 can be set in a feeder (not shown), and the packaging material 18 fed out from one of the reels. When there is no more, the packaging material 18 is fed out from the other reel. For this purpose, the last end of the packaging material 18 fed out from one reel and the foremost end of the packaging material 18 fed out from the other reel are connected by a splicer 19. In this way, by replacing the reels R1 and R2, the empty reel is replaced with a new reel, and the packaging material 18 is continuously fed out.

  The packaging material 18 is formed with breaking portions p1 extending in the lateral direction at predetermined intervals.

  First, in order to prevent the packaging material 18 from absorbing moisture when performing vertical sealing downstream of the splicer 19 in the conveying direction of the packaging material 18, a strip tape (not shown) is attached to the edge of the packaging material 18. 2, the end face of the packaging material 18 is fused so as to be wrapped.

  Subsequently, the packaging material 18 is sent to the container molding region AR1 and cut into lengths corresponding to the dimensions of the composite container 15 to form blanks 23. In the blanks 23, a fracture portion p1 is formed in the vicinity of one of the cut portions q1 in parallel with the cut portion q1. Further, a crease is formed in advance in a predetermined portion of the blanks 23, and a molding apparatus (not shown) folds the blanks 23 along the crease to form a cylindrical carton having a quadrangular cross section, that is, a cylindrical carton 24. To do. At this time, the cylindrical carton 24 is formed so that the fracture portion p1 is on one end side. The cylindrical cartons 24 are formed in pairs for processing in pairs in subsequent processes.

  Next, each cylindrical carton 24 is sent to the injection molding area AR2, and in the injection molding area AR2, a lid 22 is integrally and liquid-tight at one end of the cylindrical carton 24 by injection molding. And a carton 25 with a lid having a cylindrical carton 24 and a lid 22 integrated with each other. At this time, the carton 25 with a lid is formed so that the fracture portion p1 is positioned on the carton portion 21 side.

In the injection molding area AR2, a carton forming apparatus with a lid comprising a mandrel unit 31, an injection molding unit 32, a molding material supply unit 33 and the like is disposed. The mandrel unit 31 includes a plurality of mandrels 35 arranged radially at equal pitch angles (in the form of the present technology , 90 [°]), and in the form of the present technique , intermittently. Each mandrel 35 is rotated and placed in a loading station for loading the tubular carton 24, a forming station for forming the lid, a discharge station for discharging the carton 25 with lid, and an empty station.

  The injection molding unit 32 includes an injection device 37 and a mold device 38 disposed in the molding station. The injection device 37 includes a resin supplied from a hopper 39 of the molding material supply unit 33, for example, The polyethylene resin pellets are received, melted, and filled into the cavity space of the mold apparatus 38.

  Therefore, by cooling the resin in the cavity space, the lid body 22 is integrally formed at one end of the cylindrical carton 24, and the carton 25 with a lid body is formed.

  When the carton 25 with the lid is formed in this way, the carton 25 with the lid is taken out from the mandrel 35 by a pickup device (not shown) at the discharge station and sent to the filling area AR3 for filling with liquid food. .

  The filling area AR3 is formed in an aseptic filling chamber (not shown), and an endless conveyor 41 as a conveying device is movably disposed in the aseptic filling chamber, and the carton 25 with a lid is in an inverted state. It is mounted on the endless conveyor 41 and filled with liquid food. In the endless conveyor 41, the pair of carton 25 with a lid can be filled with liquid food at the same time. Further, sterile air is circulated as a sterile medium in the sterile filling chamber to maintain the sterile filling chamber in a sterile state.

  The endless conveyor 41 includes a plurality of pairs of buckets 43 formed at a predetermined pitch in the traveling direction, and the buckets 43 have a height substantially equal to each composite container 15. In addition, in the carton 25 with a lid, a bottom folding portion is formed in advance in order to form a bottom wall after being filled with liquid food. Therefore, when the carton 25 with a lid is inserted into the bucket 43, the bucket 43 is made lower than the carton 25 with a lid so that the bottom folded portion protrudes from the bucket 43.

By the way, in the endless conveyor 41, an insertion station is set at a predetermined position, that is, a leftmost position in the form of the present technology. In the insertion station, an insertion device (not shown) has the lid 22 at the head, and a bucket 43 The carton 25 with a lid is advanced in a state of being opposed to the opening and inserted into the bucket 43.

  A sterilization station is set adjacent to the insertion station. In the sterilization station, an unillustrated spray nozzle is arranged to face the carton 25 with a lid. The spray nozzle sprays a low-concentration hydrogen peroxide gas as a sterilizing agent toward the inner peripheral surface of the carton 25 with a lid at a predetermined timing to sterilize the carton 25 with a lid.

  Further, an ultraviolet irradiation station is set adjacent to the sterilization station, and an ultraviolet light (not shown) is arranged to face the carton 25 with a lid in the ultraviolet irradiation station. The ultraviolet light radiates ultraviolet rays toward the inner peripheral surface of the carton 25 with a lid at a predetermined timing to sterilize the inside of the carton 25 with a lid.

  A drying station is set adjacent to the ultraviolet irradiation station. In the drying station, a hot air nozzle (not shown) is arranged to face the carton 25 with a lid. The hot air nozzle injects hot air toward the inner peripheral surface of the carton 25 with a lid at a predetermined timing to dry the inside of the carton 25 with a lid and remove hydrogen peroxide gas.

  Further, a filling station is set adjacent to the drying station, and the filling nozzle 74 is disposed facing the carton 25 with a lid in the filling station. By the way, the bucket 43 holds the carton 25 with the cover upside down, and the filling nozzle 74 is disposed outside the aseptic filling chamber and connected to a tank 75 for storing liquid food, and has a predetermined timing. Thus, the liquid food supplied from the tank 75 is filled into the carton 25 with the lid body in the inverted state by a predetermined amount. A servo flow meter 76 is disposed between the filling nozzle 74 and the tank 75, and liquid food is weighed by the servo flow meter 76. The filling nozzle 74, tank 75, servo flow meter 76 and the like constitute a filling device.

  A volume flap operation station is set adjacent to the filling station, and a first operation device (not shown) is disposed in the volume flap operation station. The first actuating device narrows the space in the bucket 43, presses the carton 25 with lid from the periphery, and reduces the capacity of the carton 25 with lid.

  A first sealing station is set adjacent to the volume flap operation station, and a folding device and an ultrasonic sealing device (not shown) are disposed in the first sealing station. The folding device folds the bottom folding portion of the carton 25 with a lid projecting from the upper end of the bucket 43 along the fold line, and the sealing device exceeds the seal fin formed by folding the bottom folding portion. Seal with sonic waves.

  In addition, a second sealing station is set adjacent to the first sealing station, and a folding rail having an arc shape (not shown) is disposed in the second sealing station, and the folding rail is arranged while the bucket 43 passes. In addition, the bottom folding part is further folded. In addition, a heating device (not shown) is disposed at the second sealing station, and the heating device sprays hot air toward the sealing portion of the triangular piece formed by folding the bottom folding portion, The first resin film is melted. Further, a pressure welding device (not shown) is provided at the second sealing station, and the pressure welding device includes a flap (not shown) as a seal portion, and the triangular piece portion is pressed by the flap to perform sealing. In this way, the bottom wall b1 (FIG. 1) is formed, and the composite container 15 is completed.

  A second actuating device (not shown) is disposed downstream of the second seal station in the traveling direction of the endless conveyor 41. The second actuating device widens the space in the bucket 43 and places the composite container 15 in a decompressed state. Therefore, even if an external force is applied when the composite container 15 is opened, the liquid food is not pushed out of the composite container 15.

  Further, a take-out station is set downstream of the second operating device in the traveling direction of the endless conveyor 41, and a take-out machine (not shown) is disposed in the take-out station. The take-out machine takes out the composite container 15 from the bucket 43. At this time, the composite container 15 is taken out with the lid 22 facing upward. The empty bucket 43 is transported and sent again to the insertion station.

  In this way, the composite container 15 is completed.

  By the way, as described above, in the composite container 15, the fracture portion p <b> 1 is formed along the circumferential direction of the carton portion 21 so that the lid body 22 and the carton portion 21 can be easily separated.

  Then, the container separation method which isolate | separates the cover body 22 and the carton part 21 is demonstrated.

Figure 4 is first shown a put that container separating method assumes technology serving the form of description of the present invention of FIG, 5 is a put that container separation method in the form of technology underlying the description of the present invention second illustrated figure 6 the first showing the container separated how put to the embodiment of the present invention FIG, 7 is a second showing the container separated how put to the embodiment of the present invention FIG.

  In the figure, 15 is a composite container, 21 is a carton part, 22 is a lid, 27 is a collar comprising a pyramid part 45 and a cylindrical part 46, 28 is a cap, b1 is a bottom wall, p1 is a fractured part, and m1 to m4 are side walls. It is.

In container separation method Ru shown in Figures 4 and 5, when separating the lid 22 and the carton portions 21, a ridge line between the sidewall m1, m2 and k1, the ridge line between the sidewall m3, m4 k2 (shown And the intersections of the ridge lines k1 and k2 and the pyramid portion 45 are ε1 and ε2 (intersection ε2 is not shown), and the vicinity of the intersections ε1 and ε2 is sandwiched from both sides. 4, the pyramid portions 45 are pressed against each other so as to be crushed. At this time, not only the collar 27 but also the carton portion 21 is deformed. However, since no force is applied to the lower portion of the carton portion 21, an attempt is made to return to the original shape. As a result, stress is applied to the fracture portion p1, and the fracture portion p1 starts to break.

  Subsequently, when the fracture portion p1 is further broken so that the lid body 22 is peeled off from the carton portion 21, the lid body 22 and the carton portion 21 can be easily separated as shown in FIG. Can do.

Next, a container separation method according to the embodiment of the present invention will be described.
In container separation method Ru shown in FIGS. 6 and 7, when separating the lid 22 and the carton portions 21, when the intersection of the ridge line k1 and fracture portion p1 and .epsilon.3, the lower intersection point .epsilon.3 When the vicinity is pressed into the composite container 15, as shown in FIG. 6, the side walls m1 and m2 are bent inward in the shape of a triangle in the vicinity of the intersection ε3. At this time, since the collar 27 is made of resin, it tries to repel and keep its shape. As a result, stress is applied to the fracture portion p1, and the fracture portion p1 starts to break.

  Subsequently, when the fracture portion p1 is further broken so as to peel the lid body 22 from the carton portion 21, the lid body 22 and the carton portion 21 can be easily separated as shown in FIG.

  In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.

It is a perspective view of the composite container in the form of the technique used as the premise of description of this invention. It is a perspective view which shows the manufacturing apparatus of the composite container in the form of the technique used as the premise of description of this invention. It is a conceptual diagram which shows the manufacturing method of the composite container in the form of the technique used as the premise of description of this invention. It is a first diagram showing a container separating how put on the premise technology serving the form of description of the present invention. Is a second diagram showing the container separated how put on the premise technology serving the form of description of the present invention. It is a first diagram showing a container separating how put to an embodiment of the present invention. Is a second diagram showing the container separated how put to an embodiment of the present invention.

Explanation of symbols

15 Composite container 18 Packaging material 21 Carton portion 22 Lid 24 Cylindrical carton 25 Carton with lid b1 Bottom wall p1 Breaking part

Claims (2)

(A) a carton portion that is formed of a packaging material, includes four side walls, and forms a box-like body in which a ridge line is formed between the side walls;
(B) having a lid made of resin and integrally molded at the upper edge of the carton portion;
(C) In the vicinity of the lid on the upper edge of the carton portion, a rupture portion is formed over the four side walls in the circumferential direction, and on the two side walls sandwiching a predetermined ridge line, a point below the rupture portion on the ridge line The composite container is characterized in that a fold line connecting the point on the fractured portion is formed so that the side wall is bent into a triangular shape.   The composite container according to claim 1, wherein the breaking portion is formed by making a cut in a paper base material constituting the packaging material.

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