JP2018122912A - Liquid storage paper container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container which, being a liquid storage paper container consisting of an outer case and an inner bag, can be easily separated and does not generate garbage excessively when being disposed of.SOLUTION: The liquid storage paper container 1 with a 7-sided shape by diagonally cutting one side of a rectangular body, has an outer case 2 that fixes the bung hole onto the cut surface, and an inner bag formed by fusing the bung hole on an end of the containing part, in which the bung hole has a flange with a gap which can be fit into the inner edge of the opening of the outer case, and a discharging surface of the outer case has: a horizontal flap that can control the left and right positions of the bung hole by forming gaps on the width of the bung hole fitting part by continuously folded respectively on the left and right side plates; a back flap that has a circumferential flap that covers the circumference of horizontal flap on the left and right of the discharging surface connected with the back plate, and a U-shaped inserting part inserted into the flange gap of the bung hole 32; and a front flap that has an opening hole 271 connected to the front plate and going through the tip of the bung hole and covers the discharging surface and upper surface.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a liquid storage paper container of a back-in box in which an inner bag formed by fusing a spout into a flexible storage portion and one end of the storage portion is housed in an outer box.

  Back-in-box liquid storage paper containers used for food and non-food liquid contents include liquid drinks such as fruit juice, juice, tea, coffee, milk drinks, soup, and other alcoholic beverages such as sake and shochu. Besides, it is used for many applications such as developer, ink, paint, oil, disinfectant, liquid fertilizer, bactericidal agent, insecticide and the like. This liquid paper container has an outer box made of a laminated material in which a sealant layer made of a thermoplastic resin is provided on the inner surface of a paper layer, a bag made of a base film and a sealant layer, or between a base film and a sealant layer. Using a bag with a barrier layer such as aluminum foil, aluminum vapor deposition film, or inorganic oxide vapor deposition film, fuse spouts made of a resin with excellent fusibility such as polyethylene or polypropylene. And a composite liquid storage paper container in which the inner bag is stored in the outer box.

By the way, in such a liquid storage paper container, in order to fix the inner bag and the outer box, a spout is attached to the outer box or separately fixed by using plastic parts.
For example, in the liquid storage paper container proposed in Patent Document 1, the spout is an injection resin molded product, the surface sheet is fused to the flange surface at the lower end, and the opening hole of the blank plate of the outer box is provided. The spout is projected into the opening hole of the opened spout surface. And it describes that it welds to the inner surface of a blank board in the center two places and both sides of the front side sheet | seat of the surface front sheet | seat of an inner bag.
Such fixing of the inner bag and the outer box has a problem that when the container is discarded, it is welded to separate the outer box and the inner bag, so that it is difficult to disassemble.
There is also a method of fixing by inserting the spout with plastic parts. However, in the case of fixing using such plastic parts, there is a problem that extra dust is generated, so there is a need for a method that is not good for the environment, easy to dismantle, and does not increase the generation of dust. .

JP 58-203855 A

  Accordingly, it is an object of the present invention to obtain a liquid storage paper container composed of an outer box and an inner bag, which can be easily separated at the time of disposal and does not generate extra dust.

The present invention is a hexahedron shape obtained by obliquely cutting one side of a rectangular parallelepiped, and an outer box that forms a pouring surface having an opening for inserting a spout into the cut surface;
An inner bag having a flexible storage portion and a spout fused to one end of the storage portion;
In a liquid storage paper container consisting of
The spout has a flange with a gap that can be inserted into the inner edge of the outer box opening,
The pouring surface of the outer box
A lateral flap that is connected to each of the left and right side plates, is folded and forms a gap in the width of the spout insertion part, and allows the right and left positions of the spout to be regulated,
A back flap having a peripheral flap that is connected to the back plate and covers the left and right lateral flap peripheral edges of the pouring surface, and a U-shaped insertion portion that is inside the peripheral flap and is fitted into the flange gap of the spout,
A front flap that is connected to the front plate and has an opening hole through which the tip of the spout passes and covers the pouring surface and the top surface;
It is a liquid storage paper container characterized by having.

  The liquid storage paper container according to the present invention has a plastic inner bag and its spout that are not welded to the outer box and are simply non-rotatably inserted, so that it can be easily disassembled and takes time to separate and discard. There is nothing. In addition, the container is assembled without any special accessories, making it an environmentally friendly paper container.

It is a perspective view which shows the external appearance before the filling which fits a cap with the liquid storage paper container in the embodiment of this invention. It is an expanded view of the outer box used for it in the liquid storage paper container in the embodiment of the present invention. FIG. 3 is an external perspective view of an inner bag used in the liquid storage paper container in the embodiment of the present invention. It is the external appearance perspective view and longitudinal cross-sectional view of the spout used for it in the liquid storage paper container in the embodiment of this invention. FIG. 4 is a plan view of a spout used for the liquid storage paper container in the embodiment of the present invention, and a cross-sectional view along AA and BB in FIG. 3-2. It is a figure which shows the process of putting an inner bag into an outer box, inserting the flap of an outer box into a spout, and assembling a container with the liquid storage paper container in the embodiment of the present invention. It is a figure which shows an example which makes the stain | pollution | contamination near a spout inconspicuous in the liquid storage paper container in the example of embodiment of this invention. It is a figure which shows an example of the process which makes the liquid storage paper container in the example of this invention the vertical cross-sectional view of the spout vicinity, and the process which makes the stain | pollution | contamination by a liquid dripping inconspicuous by the back flap of an outer case.

Hereinafter, embodiments of the liquid storage paper container of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing an external appearance of a liquid storage paper container according to an embodiment of the present invention in a state before fitting a cap 4 before filling.
As shown in the perspective view, the liquid storage paper container 1 has a seven-sided shape in which one side forming an upper surface of a vertically long rectangular parallelepiped is cut obliquely, and has an opening for inserting the spout 32 into the cut surface. It has the outer box 2 which forms the pouring face plate 27 to have.
Inside, an inner bag having a flexible storage portion and having a spout 32 fused to one end of the storage portion is housed, and the spout 32 protrudes from an opening hole 271 provided in the spout surface plate 27. .

FIG. 2 is a development view of the outer box 2 used for the liquid storage paper container in the embodiment of the present invention.
The outer box 2 has a front plate 21, a left side plate 22, a right side plate 23, and a back plate 24 that are connected horizontally, and a vertical margin 223 that is connected to the left side plate 22 is bonded to the back plate 24 to form a cylindrical shape.

Below the outer box 2 are a front bottom plate 216 continuous with the front plate 21, a left bottom plate 226 continuous with the left side plate 22, a right bottom plate 236 continuous with the right side plate 23, and a back bottom plate 246 connected with the back plate 24 via creases, respectively. It is connected.
The left bottom plate 226 and the right bottom plate 236 have creases inclined in a 45 degree direction. The portions that are not directly connected to the side plates can be rotated about the crease, and a left bottom margin 2261 and a right bottom margin 2361 are formed. The left bottom margin 2261 is a front bottom pasting portion of the front bottom plate 216. In 2161, the margin 2361 on the right bottom is bonded to the back bottom attaching portion 2461 of the back base plate 246. At the time of assembling, the notch 2262 and the notch 2362 provided on the side of the folding ruler of the left bottom plate 226 and the right bottom plate 236 mesh with each other so that the assembling can be performed with one touch. Of course, the bottom surface does not have to be a one-touch assembly structure.

Above the outer box 2, the front plate 21 has a front flap in which a pouring surface plate 27, an upper surface 25, and an upper surface tack 251 are connected.
The left side plate 22 has an upper left inner flap 222 connected to the upper end and a left lateral flap 221 connected to the inclined portion, and the right side plate 23 has an upper right inner flap 232 connected to the upper end and a right lateral flap 231 connected to the inclined portion.
Further, the upper surface inner flap 241 and the peripheral flap 242 are connected to the upper end of the back plate 23, and the insertion portion 243 having a U-shaped tip is slidably connected to the center of the upper internal flap 241 and the peripheral flap 242. Has been. Further, a top tack notch 244 into which the top tack 251 can be inserted is provided between the back plate 24 and the insertion portion 243.

FIG. 3 is an external perspective view of an embodiment of the inner bag 3 used in the liquid storage paper container of the present invention.
The inner bag 3 is composed of a flexible bag 31 in which the sealant surfaces of the front film 311 and the back film 312 are aligned and the periphery thereof is welded, and a spout 32.
In the unfilled state, the bag body 31 is rectangular and has a shape in which the upper corner is greatly cut out, and the spout 32 is fused to the cut-out side.
Below the inner body 31, a standing pouch (gusset) is formed in which an intermediate film 313 is folded and fused between the front film 311 and the back film 312. However, this shape is not necessarily required.
The spout 32 has a boat-shaped fusion part 322 having a boat-shaped cross section below, and is fused while being sandwiched between the front film 311 and the back film 312. Above the boat-shaped fused portion, a lower flange 324, an upper flange 323, and a pouring cylinder 321 having a screw portion that is screwed to the cap on the outside are connected.

FIG. 4 is a liquid storage paper container according to an embodiment of the present invention. FIG. 4A is an external perspective view, and FIG.
The spout 32 has a boat-shaped fusion portion 322 having a boat-shaped cross section at the lower end, and a spout cylinder 321 connected to the upper portion.
A lower flange 324 is provided just above the boat-shaped fusion part 322 on the outer periphery of the dispensing cylinder.
An upper flange 323 is provided above the lower flange 324 via an insertion gap 325 into which an insertion portion of the outer box, a left side flap, a right side flap, and the like are inserted.
Furthermore, above the upper flange 323, a locking claw 326 that prevents the tamper evidence band at the lower end of the cap from rotating, and a ring-shaped protrusion 327 that is locked so that the tamper evidence band does not come off and breaks from the top of the cap. have.
Above the ring-shaped protrusion, there is a threaded portion that engages with the cap, and can be opened and closed by turning the cap.

FIG. 5 is an embodiment of a spout used for a liquid storage paper container, FIG. 5-1 is a plan view thereof, FIG. 5-2 is a cross-sectional view taken along line AA of FIG. 3-2, and FIG. 2 shows a cross section in which the front film 311 and the back film 312 are fused.
As shown in the plan view of FIG. 5A, there is a threaded portion 3211 on the outer periphery of the extraction tube 321, and a lower hexagonal upper flange 323 is visible around the screw portion 3211. Of course, the upper flange 323 is not limited to a hexagonal shape, and may be a circular shape, a square shape, or an octagonal shape.

FIG. 5-2 is a cross-sectional view taken along the line AA in FIG. 3-2, and is a cross section in the insertion gap 325 into which the insertion portion of the outer box, the left side flap, the right side flap, and the like are inserted.
As shown in this figure, the outer periphery of the extraction tube 321 has insertion ribs 328 parallel to each other.
The insertion rib 328 has the same length as the outer diameter of the dispensing cylinder and the same interval as the outer diameter, and is inserted into the insertion gap 325 between the left lateral flap end surface and the right lateral flap end surface. The fitting rib 328 can be inserted.

FIG. 5C is a cross-sectional view taken along the line BB in FIG.
A pouring hole 320 passes through the center of the boat-shaped fusion part 322.
Then, the sealant surfaces of the front film 311 and the back film 312 are fused to both outer sides of the boat-shaped fusion part 322, respectively. Both ends where the front film 311 and the back film 312 are combined are thin so that an unfused portion is not generated.
Although the lower flange 324 can be seen in the rear of the figure, it is usually preferable that the outer periphery of the front and rear, right and left of the boat-shaped fusion portion does not protrude from the lower flange.

FIG. 6 shows a process for assembling the outer box and the inner bag by inserting the inner bag into the outer box and inserting the flap of the outer box into the spout in the liquid storage paper container in the embodiment of the present invention. It is a figure of the exit surface vicinity.
In the assembly, as a first step, four bottom plates connected to the four side plates are assembled first. In the outer box as shown in FIG. 2, if the left and right bottom margins are attached to the front and back bottom pasting portions, the bottom can be assembled simply by pulling the bottom.
When the bottom of the outer box is assembled, the upper part for inserting the inner bag is opened, and the inner bag can be easily put into the outer box.
In the second step, the left and right upper and inner flaps are bent above the outer box.
Thereafter, as shown in FIG. 6A, the left lateral flap 221 is bent from the upper end of the left side plate 22, and the right lateral flap 231 is bent from the upper end of the right side plate 23. Then, both ends of the left and right insertion ribs 328 can be inserted into the gap formed by the end surface of the left lateral flap 221 and the end surface of the right lateral flap 231.
In the third step, as shown in FIG. 6B, the upper surface inner flap 241 and the peripheral flap 242 connected to the back plate 24 are put on the overlapped left lateral flap 221 and right lateral flap 231.
At this time, the inner edge of the peripheral flap 242 is inserted into the insertion gap of the spout.
In the fourth step, as shown in FIG. 6-3, the insertion portion 243 having a U-shaped tip connected to the upper surface flap 241 is inserted into the insertion gap of the spout from the back side.
In the insertion gap of the spout 32, the peripheral edge flap 242 of the pouring surface, the insertion portion 243, the left side flap 221 and the right side flap 231 are inserted from four directions, so that they are firmly fixed.
Furthermore, in a 5th process, as shown to FIGS. 6-4, the front surface flap which the pouring surface board 27 connected to the front board 21, the upper surface 25, and the upper surface tack 251 continued is covered. The extraction cylinder 321 is passed through the opening hole 271 of the extraction surface plate 27, and the upper surface tack 251 is inserted into the upper surface tack notch 244 at the upper end of the rear surface plate 24.
In this way, the liquid storage paper container of the present invention can be assembled.

By the way, after removing the cap, tilting the container, and pouring out the contents, there is a problem that the contents hang down from the spout and the container is soiled.
As a countermeasure, FIG. 7 is an example of a countermeasure in which a gap 272 is formed by separating the peripheral edge of the opening hole 271 of the front flap from the outer surface of the spout below the spout. Accordingly, the opening hole 271 may have a large circular shape, but is preferably formed in an oval shape as illustrated.
FIG. 8 is a longitudinal sectional view of the vicinity of the spout in the liquid storage paper container and a detailed view showing an example of a process for making dirt due to liquid dripping inconspicuous at the back flap of the outer box.
As shown in the cross-sectional view of FIG. 8-1, when the contents 5 in the vicinity of the spout hang down and flow through the spout outer wall, the outermost surfaces of the spout and the outer box are prevented from adhering to the outer box. If the gap with the opening hole 271 of the pouring face plate 27 located at is increased, the contents flow to the pouring outlet base side.
At this time, as shown in the enlarged view of FIG. 8-1 and FIG. 8-2, the slits 2423 having a length of 1 to 10 mm are formed in a large number of columns and a large number of rows on the peripheral flap 242 and alternately. Put it evenly.
The slit 2423 is a sag absorbing slit, and is supported on the inner sealant layer 2422 side as shown in the enlarged sectional view of FIG. ing. For this reason, the contents drooping from the spout are absorbed into the slit 2423 by capillary action.
Furthermore, since the tip of the slit 2423 is a paper base material, the contents can be absorbed by the capillary phenomenon, so that a very large absorption capacity can be obtained.
As shown in FIG. 8A, the peripheral flap 242 is covered by a pouring face plate 27 connected to the front face plate 21, so that the dirt is slightly conspicuous only by being slightly visible at the back of the spout where it is difficult to see. Absent.

The outer box used for the liquid storage paper container of the present invention is a paper container using paper as a base material.
The base paper is a paper board having a basis weight of 200 g / m ² to 800 g / m ² , and when printing on the surface, coated manila, coated ball, ivory, etc. with a white side can be used.
Furthermore, it is necessary to adhere the body portion matching portion and the bottom portion of the side surface of the container with heat sealing or an adhesive. For heat sealing, a laminated sheet is used in which a thermoplastic film excellent in sealability such as a polyethylene film of 15 μm to 80 μm, an ethylene / vinyl acetate copolymer, or a polypropylene film is bonded to at least the back surface.
When gluing, paper alone may be used.
Of course, in order to improve the barrier property, a laminate sheet in which an aluminum foil, a polyethylene terephthalate film deposited with silicon oxide, aluminum, or the like is laminated on the inside of the substrate may be used. In the case of stacking, it can be easily manufactured using a dry lamination machine or an extruder lamination machine.

The front film and the back film used for the inner bag used in the liquid storage paper container of the present invention are determined by the barrier property for storing the contents, the conditions for filling the contents, and the like. For example, a configuration such as stretched polyethylene terephthalate / polyamide resin film / sealant from the outside is conceivable.
Specifically, biaxially oriented polyamide / polyethylene / inorganic oxide vapor-deposited polyethylene terephthalate / low density polyethylene,
Biaxially stretched polyethylene terephthalate / adhesive / polyamide / adhesive / ethylene vinyl acetate copolymer saponified product / low density polyethylene,
Biaxially stretched polyethylene terephthalate / adhesive resin / polyamide / adhesive / low density polyethylene,
Biaxially oriented polypropylene / adhesive / polyamide / adhesive / low density polyethylene,
A general configuration such as In addition, in the case of filling at a high temperature or in the case of contents such as retort food, it is desirable to use unstretched polypropylene for the sealant layer instead of low-density polyethylene.
These films can be produced by pasting them together with an ordinary dry lamination machine, an extruder laminating machine, or the like.

The intermediate film used for increasing the capacity by using an intermediate film on the bottom surface may have the same configuration as the front film and the back film. However, since it is used by being folded, it is necessary to be softer than the front film and the back film, so it is preferable to make the biaxially stretched film of the surface layer thin.
In particular, a biaxially stretched film is used for the surface layer so that the surface layers are not fused together.

The liquid storage paper container of the present invention is as described above, and the plastic inner bag and its spout are not welded to the outer box and are simply non-rotatably inserted so that they can be easily disassembled. Therefore, it does not take time to dispose of waste. Furthermore, since the container is assembled without adding any special accessories, it is a paper container that is environmentally friendly, inexpensive, and highly productive.
In addition, if it has a shape that has a liquid dripping absorption slit on the peripheral surface, even if some contents leak from the spout, it does not flow to the extraction surface on the surface side, but is absorbed by the inner peripheral surface, and dirt is conspicuous You can leave it out.
Moreover, even a cap having a tapper evidence band can be easily handled.
The merit of the present invention is great.

1 ... Liquid storage paper container 2 ... Outer box 21 ... Front plate 216 ... Front bottom plate 2161 ...・ ・ ・ ・ Front bottom pasting part 22 ・ ・ ・ ・ ・ ・ Left side plate 221 ・ ・ ・ ・ ・ ・ Left side flap 222 Vertical margin 226... Left bottom plate 2261... Left bottom margin 2262... Cut 23 ... Right side plate 231. Horizontal flap 232... Upper right inner flap 236... Right bottom plate 2361... Right bottom margin 24. ················································ Flap 243
244 ······························································································································· ..Top tack 27 ... Pouring face plate 271 ... Open hole 272 ... Gap 3 ... Inner bag 31 ... ······································································································· ········································································································ Upper flange 324 ... Lower flange 325 ... Insertion gap 326 ... Locking claw 327 ... Ring-shaped protrusion 328 ... ... inserted rib 4 ......... cap 41 ........ tapper evidence band 5 ......... contents

Claims (5)

A hexahedron shape obtained by obliquely cutting one side of a rectangular parallelepiped, and an outer box that forms a pouring surface having an opening for inserting a spout into the cut surface;
An inner bag having a flexible storage portion and a spout fused to one end of the storage portion;
In a liquid storage paper container consisting of
The spout has a flange with a gap that can be inserted into the inner edge of the outer box opening,
The pouring surface of the outer box
A lateral flap that is connected to each of the left and right side plates, is folded and forms a gap in the width of the spout insertion part, and allows the right and left positions of the spout to be regulated,
A back flap having a peripheral flap that is connected to the back plate and covers the left and right lateral flap peripheral edges of the pouring surface, and a U-shaped insertion portion that is inside the peripheral flap and is fitted into the flange gap of the spout,
A front flap that is connected to the front plate and has an opening hole through which the tip of the spout passes and covers the pouring surface and the top surface;
A liquid storage paper container characterized by comprising:   The liquid storage paper container according to claim 1, wherein the opening hole of the front flap has a gap that separates the periphery of the opening hole from the outer surface of the spout, below the spout.   The liquid storage paper container according to claim 1, wherein a liquid sag absorbing slit is provided on a peripheral surface that covers a peripheral surface of the pouring surface of the back flap.   The liquid according to any one of claims 1 to 3, wherein the outermost shape of the insertion portion of the flange having a gap that can be inserted into the inner edge of the outer box opening of the spout has a parallel fitting surface. Storage paper container.   There is a tamper evidence band at the lower end of the cap that closes the spout, a claw that prevents the tamper evidence band from rotating on the spout side of the spout flange, and a ring that breaks the tamper evidence band from the top of the cap 5. The liquid storage paper container according to claim 1, wherein the liquid storage paper container has any one of the protrusions, or the claw and the ring-shaped protrusion.