Bag in box

Abstract

To provide a bag-in-box capable of facilitating a fixing operation by opening a part of a paper container to pull out a spout to an outside of the paper container when opening a plug, according to a double container whose outside is made of the paper container, that is formed by storing an inner bag comprising the spout with a plastic film as a substrate on an inner side thereof.SOLUTION: According to a bag-in-box, an outer box is a hexahedron, and an inner bag is capable of storing liquid. Circular perforations are provided above a front side trunk part. The circular perforations are cut out to form an opening, and a spout is exposed by protruding to an outside of the outer box from the opening. Further, a flap and a knob part that are continuous from the front side trunk part are covered on a top face and a slope thereof to have the outer box as a heptahedron to which the slope is added. The knob part is inserted and fixed to a slit of a ridge line between the flap and a rear side trunk part, and is made to be in a state where liquid of a content can be poured out.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a double container, in particular a bag-in-box that is configured by housing an inner bag made of a plastic film as a base material on the inside and can be used as a liquid container. [Background technology]

[0002] In today's modern lifestyle, in the distribution and sales of liquid products, many products using liquid containers made of plastic film or paper containers for liquids are produced, distributed, sold and delivered to consumers.

[0003] For example, beverages such as juice, dairy drinks, and alcoholic beverages are filled in predetermined amounts into liquid containers such as glass, plastic bottles, and liquid paper containers by liquid filling devices at the manufacturer, sealed, and then shipped as products.

[0004] Among these, there is a container called a bag-in-box, which is a double container in which an inner bag made of plastic film is filled with liquid, a spout is sealed, and the container is then stored in a paper box.

[0005] In the case of such double containers, since the outer container is a paper container, it can be made into a rectangular or cubic shape, which makes it possible to improve inventory efficiency in warehouses and transportation efficiency.

[0006] The outer paper container can also strengthen mechanical strength, including impact resistance, and block environmental influences such as ultraviolet rays. The outer paper container can also be easily decorated with printing or other surface decoration, and a paper box on the outside is more convenient to carry and easier to handle than a plain plastic container.

[0007] In addition, the inner bag is made of plastic film, making it suitable for storing liquids, and the required amount can be taken out each time by opening and closing the spout. Furthermore, when used, the double container can be easily separated into the paper container and the inner bag made of plastic film, making it possible to reduce the volume, and it has become widely accepted as an environmentally friendly liquid container.

[0008] In the case of such a double container capable of storing liquid, the spout attached to the inner bag can be exposed by protruding outward from the outer paper container, making it easier to take out the liquid when needed.

[0009] In this case, the spout requires preparation before use, such as providing an opening on the outer paper container and a flap that connects to the opening, and then pulling the spout out from the opening and then fixing the spout to the opening of the paper container using the flap, which makes it cumbersome.

[0010] Alternatively, if the spout is exposed and protrudes from the paper container in advance, a plastic part is required to secure the spout in place, and there is also the problem that the exposed spout makes stacking and handling difficult.

[0011] Patent Document 1 describes a bag-in-box for liquids that can be used for decomposition, separation, and sorting after use. A convenient bag-in-box has been proposed, but before use, the paper container is a seven-sided cuboid with one side cut diagonally, and the spout is exposed. The shape of the paper container and the exposed spout make it difficult to stack and handle, which poses problems.

[0012] Alternatively, if an inner bag with a spout is built into a rectangular paper container and the spout is exposed by protruding it outward when in use, and then fixed in place to open it, a series of assembly steps must be performed by hand, requiring complicated work.

[0013] Fig. 1 is a perspective (partially see-through) schematic diagram for explaining a typical bag-in-box. In the example of a typical bag-in-box (100) shown in Fig. 1, the outer box (10) is a seven-sided shape having a slope (17) that is a surface that descends from the top surface (16) to the front body portion (12), and a spout (51) that is continuous with the inner bag (50) is fixed to protrude from the slope (17) to the outside of the outer box (10).

[0014] Since the bag-in-box (100) in such a state is manufactured with an exterior shape including the slope (17) in advance, stacking is difficult during transportation, storage, and handling, which is inconvenient.

[0015] In addition, in order to perform the assembly work by placing the inner bag (50) filled with liquid inside the outer box (10) and fixing the spout (51) to the slope (17), a separate member for fixing may be required, which may be costly and time-consuming to install. In addition, the work of aligning the spout (51) with the cutout and opening of the outer box (10) is complicated.

[0016] The present invention aims to improve these points and provide a bag-in-box that consists of a cubic-shaped outer box and an inner bag stored inside, and which allows the easy operation of opening by opening part of the paper container and pulling the spout out to the outside of the paper container and securing it in place. [Prior art documents] [Patent documents]

[0017] [Patent Document 1] JP 2018-122912 A Summary of the Invention [Problem to be solved by the invention]

[0018] The present invention has been made in consideration of the above-mentioned circumstances, and has an objective to provide a bag-in-box which is a double container consisting of a paper container on the outside and an inner bag with a spout and made of a plastic film as a base on the inside, and which can be opened by simply opening part of the paper container and pulling the spout out to the outside of the paper container and fixing it in place. [Means for solving the problem]

[0019] As a means for solving the above problem, the invention described in claim 1 is: A double container consisting of an outer box made of paper and an inner bag made of a plastic film as a base material, The outer box has a rectangular parallelepiped shape, and the inner bag has a spout and can store liquid. The spout has a groove at its base for fixing to the outer box, The outer box consists of six sides: the top, front body, left body, right body, rear body, and bottom. The top surface is made up of three overlapping layers, The innermost layer of the top surface has a flap with a notch that continues from the left and right sides of the body, folded inward at right angles from the left and right and butted together. This cutout is located in the center of the flap. The outer box is provided so as to extend in the left-right direction. It is provided on the forward body side from the mountain fold line, The middle layer of the top surface has a flap that continues from the rear body and is folded at a right angle from the back to the front. A slit is formed on the ridge between this flap and the rear fuselage. The outermost layer of the top surface is made up of a flap that continues from the front body and a tab that continues from it, folded at a right angle towards the back and overlapping each other. There is a circular perforation at the top of the front body that can be cut out. Between the upper part of the front body and the upper parts of the left and right body, perforations are provided along the ridge line to form an outer box; When removing the liquid content, the handle is gripped with fingers and pulled forward to tear the perforation of the ridge line, cutting the tearable circular perforation of the front body to form an opening; The intermediate layer flaps continuing from the rear torso section are raised backward to expose the innermost layer flaps with cutouts continuing from the left and right torso sections; The notched flap is folded downward toward the front fuselage at the central mountain fold line, forming a slope from the top surface down to the front fuselage. Place the left and right sides of the torso on top of this slope, and fold the upper front corners of the torso inwards from the left and right. The notches of the innermost layer flaps continuing from the left body section and the right body section are sandwiched and fixed in the grooves of the spouts of the inner bag contained inside the outer box; The spout is exposed by protruding from the circular opening to the outside of the outer box; Furthermore, the flap continuing from the front body and the knob continuing from it are placed over this slope and the top surface, making the outer box into a seven-sided shape with a slope added. The knob part is A flap continues from the rear fuselage Insert and fix the flap into the slit on the ridge between the flap and the rear body. This bag-in-box is characterized by making the liquid contents pourable. Effect of the Invention

[0020] According to the present invention, it is possible to provide a bag-in-box which is a double container consisting of a paper container on the outside and an inner bag with a spout and made of a plastic film as a base on the inside, and which can be easily opened by opening part of the paper container and pulling the spout out to the outside of the paper container and fixing it in place.

[0021] In particular, the outer box is initially a hexahedron, making it easy to stack for storage, and is also a great advantage in terms of transportation efficiency.In addition, when opening the box to pour out the contents, slopes are formed on the top surface and the upper part of the front body, making it easy to pull out the spout and fix it to the outer box, making it a bag-in-box with excellent convenience. [Brief description of the drawings]

[0022] [Figure 1] FIG. 1 is a perspective (partially see-through) schematic diagram for explaining a typical bag-in-box. [Diagram 2] FIG. 2 is a perspective (partially see-through) schematic view for explaining the configuration of a bag-in-box according to one embodiment of the present invention. [Diagram 3] FIG. 3 is a schematic perspective view illustrating the appearance of an outer box in one embodiment of the bag-in-box according to the present invention. [Figure 4] FIG. 4 is a planar development schematic diagram of an outer box in one embodiment of the bag-in-box according to the present invention. [Diagram 5] FIG. 5 is a schematic perspective view illustrating a state in which a slope of the outer box is formed in one embodiment of the bag-in-box according to the present invention. [Figure 6] FIG. 6 is a schematic perspective view illustrating a state in which a flap continuing from the front body section, a tab continuing therefrom, and a flap continuing from the rear body section are raised in one embodiment of the bag-in-box according to the present invention. [Figure 7] FIG. 7 is a schematic perspective view illustrating a state in which a slope is formed in one embodiment of the bag-in-box according to the present invention. [Figure 8] FIG. 8 is a schematic perspective view (partially see-through) illustrating one embodiment of the bag-in-box according to the present invention, in which the outer box is a seven-sided box with a slope, the spout is pulled out and fixed in place, and the liquid content can be poured out. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] The present invention will be described in more detail below with reference to Figs. 2 to 8. However, the present invention is not limited to the examples shown here. The present invention is defined by the claims.

[0024] FIG. 2 is a perspective (partially see-through) schematic view for explaining the configuration of a bag-in-box according to one embodiment of the present invention.

[0025] The bag-in-box (100) according to the present invention is a double container consisting of an outer box (10) made of paper and an inner bag (50) made of a plastic film as a base material, the outer box (10) being rectangular in shape and consisting of six sides: a top surface (16), a front body section (12), a left body section (13), a right body section (14), a rear body section (15), and a bottom surface (11). The inner bag (50) is equipped with a spout (51) and is capable of storing liquid therein.

[0026] The plastic film is a film made of a polymer resin composition, and examples of the plastic film that can be used include polyolefins (polyethylene, polypropylene, etc.), polyesters (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamides (nylon-6, nylon-66, etc.), and polyimides, and can be selected appropriately depending on the application.

[0027] In particular, polypropylene and polyethylene terephthalate are preferable in terms of film strength and cost when used as plastic films. In addition, when a stretched polyamide film is used, it is possible to impart the laminate with strength against punctures and strength against impacts.

[0028] The bags can be made by using a plastic film as a base material, providing a sealant layer on the surface that will become the inside of the inner bag (50), and then arranging the sealant layers so that they face each other and sealing them.

[0029] As the material for the sealant layer, polyolefin-based resins, which are thermoplastic resins, are generally used. Specifically, ethylene-based resins such as low-density polyethylene resin (LDPE), medium-density polyethylene resin (MDPE), linear low-density polyethylene resin (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-α-olefin copolymer, and ethylene-methacrylic acid resin copolymer; blend resins of polyethylene and polybutene; and polypropylene-based resins such as homopolypropylene resin (PP), propylene-ethylene random copolymer, propylene-ethylene block copolymer, and propylene-α-olefin copolymer can be used.

[0030] The sealant layer can be formed by forming a layer on a plastic film using a molten resin by using an extruder or the like. Alternatively, a material that has already been formed into a film can be laminated on the surface of the plastic film. It is also possible to form a sealant layer.

[0031] The spout (51) may be, for example, a molded product made of a thermoplastic resin, and may also be adhered by sealing with a sealant layer. The inner bag (50) may be sealed by placing a cap on the spout (51).

[0032] FIG. 3 is a schematic perspective view illustrating the appearance of an outer box in one embodiment of the bag-in-box according to the present invention.

[0033] As described above, the outer box (10) of the bag-in-box (100) according to the present invention has a rectangular parallelepiped shape and is made up of six sides: a top side (16), a front body section (12), a left body section (13), a right body section (14), a rear body section (15), and a bottom side (11). The top side (16) is the shaded surface in Fig. 3.

[0034] Since the outer box (10) has a rectangular parallelepiped outer shape, it can be easily stacked, making the bag-in-box (100) highly convenient in terms of distribution, inventory, and handling.

[0035] However, when attempting to remove the liquid contents, in the bag-in-box (100) of the present invention, the spout (51) can be easily pulled out and secured to the outside of the outer box (10), allowing the liquid contents to be removed without hindrance.

[0036] First, a cut-out circular perforation (20) is provided at the upper portion of the front body portion (12) for pulling out the spout (51) to the outside.

[0037] In the example shown in FIG. 3, the flap (22) continuing from the front body portion (12) and the tab portion (23) continuing from the flap (22) are folded at a right angle toward the rear side of the outer box (10) to form the top surface (16).

[0038] Ridge perforations (21) are provided on the left and right sides between the upper part of the front body portion (12) and the upper parts of the left body portion (13) and the right body portion (14) to form the upper part of the outer box (10).

[0039] By cutting the perforations (21) along this ridge, it is possible to form a slope that descends from the top surface (16) toward the front body portion (12) in order to pull the spout (51) out of the outer box (10); the details of this operation will be described later using Figures 7 and 8.

[0040] In the example shown in Figure 3, the top surface (16) has perforations (24) on both the left and right sides of the flap (22) continuing from the front body portion (12) and the tab portion (23) continuing from the flap (22), and the flap (22) and the tab portion (23) can be formed by separating them at the perforations (24).

[0041] The front body portion (12) has a mountain fold line (25) which is located at the lower end of the ridge perforation (21) on the left and right sides between the upper parts of the left body portion (13) and the right body portion (14) at the upper part of the front body portion (12).

[0042] In the state shown in FIG. 3, the mountain fold line (25) is flat, but when a slope is formed as described below, it becomes the ridge line of the lower end of the slope.

[0043] Also, on the top surface (16), a flap (22) continuing from the front body portion (12) and a tab portion (23) continuing therefrom are visible, and the flap (22) is provided with a mountain fold line (27).

[0044] In the state shown in Fig. 3, the mountain fold line (27) is flat, but when a slope is formed as described below, it becomes the ridge line of the upper end of the slope. Details of this operation will be described later with reference to Figs. 7 and 8.

[0045] A fold line (28) is provided on the top surface (16) at the boundary between the flap (22) and the knob portion (23) continuing therefrom. This is the part that re-fixes the top surface (16) in forming a slope that descends from the front top surface (16) toward the front body portion (12). The details of this work will be described later using Figures 7 and 8.

[0046] In addition, a diagonal mountain fold line (26) is provided on the upper part of the right side body section (14) from the top surface (16) to the front body section (12). This is the part that is folded into the slope surface to form the middle layer of the slope that descends from the top surface (16) to the front body section (12).

[0047] A similar mountain fold line is provided on the left body part (15), but is not visible because it is on the back side of the outer box (10) in the example shown in Fig. 3. The details of the folding operation onto these sloped surfaces will be described later with reference to Figs. 7 and 8.

[0048] FIG. 4 is a planar development schematic diagram of an outer box in one embodiment of the bag-in-box according to the present invention.

[0049] In the flat development schematic diagram of one embodiment shown here, all of the fold lines shown are mountain folds and are arranged so as to be able to form a rectangular parallelepiped outer box (10) of the present invention, inside which an inner bag (50) made of plastic film and equipped with a spout (51) can be placed, capable of storing liquid contents as a double container.

[0050] In the bag-in-box (100) of the present invention, when the liquid content is to be poured out through the spout (51) and removed, the spout (51) can be easily pulled out and secured to the outside of the outer box (10), allowing the liquid content to be removed without hindrance.

[0051] At this time, a mechanism is provided that can form a slope descending from the top surface (16) to the front body portion (12) at the top of the outer box (10), cut out the circular perforation (20) to form an opening, and pull out and fix the spout (51) of the inner bag (50) to the outside of the outer box (10). This operation can be easily performed by hand or fingers.

[0052] The top surface (16) is formed by overlapping three layers, and on the innermost layer of the top surface (16), a notched flap (30) continuing from the left body portion (13) and a notched flap (33) continuing from the right body portion (14) are arranged so that they can be folded inward at right angles from the left and right and butted together.

[0053] The notch in notched flap (30) is indicated by notch (32) and the notch in notched flap (33) is indicated by notch (34).

[0054] The notch (32) and the notch (34) are the notched flap (30). The fold lines (31) and (35) are provided vertically in the center of the flap (33) with a cutout, respectively, on the front body portion (12) side.

[0055] A flap (36) continuing from the rear body part (15) can be folded at a right angle from the rear side to the front side and layered on the middle layer of the top surface (16), and a slit (37) is formed on the ridge between this flap (36) and the rear body part (15).

[0056] The outermost layer of the top surface (16) has a flap (22) continuing from the front body part (12) and a tab part (23) continuing from the flap (22), which can be folded at right angles along a mountain fold line (29) toward the rear side of the outer box (10) and layered to form the top surface (16), which can be used as the outermost layer.

[0057] A circular cut-out perforation (20) is provided at the top of the front body section (12). Also, ridge perforations (21) are provided at the ridges between the top of the front body section (12) and the tops of the left body section (13) and right body section (14).

[0058] In addition, perforations (24) are provided on the left and right sides of a flap (22) continuing from the front body portion (12) and a tab portion (23) continuing from the flap (22), and the flap (22) and the tab portion (23) can be formed by cutting off these left and right trapezoidal shaped portions.

[0059] Further, a perforation (19) is provided on the right side body portion (14) and the ridge line of the notched flap (33) on the side of the front body portion (12) from the vertical mountain fold line (35) of the notched flap (33). By tearing this perforation (19), it becomes possible to push the notched flap (33) downward at the mountain fold line (35) to form the innermost layer of the slope (17).

[0060] The same is true for the notched flap (30) that continues to the left body portion (13).

[0061] The operations of cutting, separating and ripping these perforations are carried out when forming the slope, which will be described later.

[0062] Extending from the top of the front body (12), the flap (22) of the top panel (16) and the tab portion (23) connected thereto have several horizontal mountain folds, of which mountain fold (29) forms the ridge between the front body (12) and the top panel (16) of the original hexahedral shape of the outer box.

[0063] The mountain fold line (25) forms a slope that descends from the top surface (16) to the front body portion (12) when the liquid contents are removed, and becomes a ridge that forms the lower end of the slope when the spout (51) of the inner bag (50) is pulled out.

[0064] The mountain fold line (27) forms a slope that descends from the top surface (16) to the front body portion (12) when the liquid contents are removed, and becomes a ridge that forms the upper end of the slope when the spout (51) of the inner bag (50) is pulled out.

[0065] The mountain fold line (28) is located at the boundary between the flap (22) and the tab portion (23), and when removing the liquid content, the flap (22) is used to cover the top surface again, and then the tab portion (23) can be folded at a right angle at the mountain fold line (28) and inserted into the slit (37) to fix the flap (22). At this time, the mountain fold line (28) inserted into the slit (37) becomes the ridge between the top surface (16) and the rear body portion (15).

[0066] FIG. 5 is a schematic perspective view illustrating a state in which a slope of the outer box is formed in one embodiment of the bag-in-box according to the present invention.

[0067] As described above, in the bag-in-box (100) according to the present invention, when the slope (17) is formed, the spout (51) of the inner bag (50) is pulled out and fixed to the outside of the outer box (10), enabling stable pouring.

[0068] A circular perforation (20) is located in the center of the slope (17), and a circular opening can be formed by cutting this out. A square shape formed by the butting of the notch (32) and the notch (34) is exposed inside this circular opening. The spout (51) can be pulled out to the outside of the outer box (10) from this portion.

[0069] On the other hand, the spout (51) has a groove at its base for fixing it to the outer box (10), and this rectangular portion can be sandwiched in the groove of the pulled-out spout (51) to fix the spout (51) to the outer box (10).

[0070] The slope (17) is formed so as to slope downward from the top surface (16) toward the front body section (12), and the outer box (10) changes from the original hexahedron to a heptahedron. As a result, the area of ​​the top surface (16) is reduced, and the ridge between the original top surface (16) and the front body section (12) remains as a flattened mountain fold (29) on the surface of the slope (17).

[0071] When it is in a hexahedral shape, the top surface (16) consists of a flap (22) continuing from the front body portion (12) and a tab portion (23) continuing from that, but when it is in a heptahedral shape with the slope (17) formed by cutting or tearing the perforations, the flap (22) forms a ridge at the mountain fold line (27) and is divided into a part that becomes the slope (17) and a part that becomes the top surface (16).

[0072] The handle portion 23 is bent at a right angle along a mountain fold line 28 and is then inserted into a slit 37 to secure the slope 17 and the top surface 16. The mountain fold line 28 also forms a ridge between the top surface 16 and the rear body portion 15.

[0073] FIG. 6 is a schematic perspective view illustrating a state in which a flap continuing from the front body section, a tab continuing therefrom, and a flap continuing from the rear body section are raised in one embodiment of the bag-in-box according to the present invention.

[0074] When the liquid content is to be removed, the spout (51) is pulled out of the outer box (10) and secured in place. In the example shown in FIG. 6, the handle (23) is first grasped with the fingers and pulled forward together with the flap (22) in the direction of the arrow (2), the retractable circular perforation (20) in the front body section (12) is cut away to form an opening, and the flap (36) in the middle layer of the top surface (16), which continues from the rear body section (15), is then raised in the direction of the arrow (3).

[0075] By lifting the flaps in the directions of arrows (2) and (3), the innermost layer constituting the top surface (16), a notched flap (30) continuing from the left body section (13) and a notched flap (33) continuing from the right body section (14), are exposed in a state where they are folded inward at right angles from the left and right and butted together.

[0076] In the bag-in-box (100) according to the present invention, the outer box (10) contains an inner bag (50) with a spout (51) therein. This is not shown because it is merely an explanation.

[0077] FIG. 7 is a schematic perspective view illustrating a state in which a slope is formed in one embodiment of the bag-in-box according to the present invention.

[0078] When the liquid content is to be removed, the spout (51) is pulled out of the outer box (10) and secured in place. In the example shown in FIG. 7, following the state shown in FIG. 6, the tab (23) and flap (22) are pulled in the direction of arrow (4) to tear the perforation (21) along the ridge.

[0079] Next, on the innermost layer of the top surface (16), the notched flap (30) continuing from the left body section (13) and the notched flap (33) continuing from the right body section (14) are folded inward at right angles from the left and right sides to meet at the mountain fold lines (31) and (35), and the portions of the notched flap (30) and the notched flap (33) close to the front body section (12) are pushed down in the direction of arrow (5) to form the innermost layer of the slope (17).

[0080] When carrying out this operation, the right side body section (14) and the notched flap (33) are pushed down in the direction of the arrow (5) to form the slope (17) by tearing the perforation (19) provided on the ridge line on the front body section (12) side from the vertical mountain fold line (35) to the right side body section (14) and the notched flap (33). This perforation (19) is shown in the plan development view of FIG. 4 and the perspective schematic view of FIG. 6.

[0081] FIG. 8 is a schematic perspective view (partially see-through) illustrating one embodiment of the bag-in-box according to the present invention, in which the outer box is a seven-sided box with a slope, the spout is pulled out and fixed in place, and the liquid content can be poured out.

[0082] When the liquid content is to be removed, the spout (51) is pulled out and fixed to the outside of the outer box (10), but in the example shown in Figure 8, following the state shown in Figure 7, the upper corners of the left body section (13) and the right body section (14) close to the front body section (12) are folded toward the slope (17) at mountain fold line (26) to form the middle layer of the slope (17). The folded portion has a triangular shape.

[0083] Next, the handle portion (23) is pulled toward the rear of the outer box in the direction of the arrow (8), and the outermost layer is covered with the upper part of the front body portion (12) and the flap (22) continuing therefrom, to form the slope (17) and the top surface (16).

[0084] Furthermore, the tab portion (23) can be folded at a right angle along the mountain fold line (28) and inserted into the slit (37) in the direction of the arrow (9) to fix the flap (22). At this time, the mountain fold line (28) becomes the ridge between the top surface (16) and the rear body portion (15).

[0085] Simultaneously with the reconfiguration of the slope (17) and the top surface (16), the spout (51) of the inner bag (50) can be pulled out in the direction of the arrow (1) from the opening formed by the circular perforation (20).

[0086] Next, the notched flap (30) and the notched flap (33) are clamped and fixed in the grooves of the spout (51), making it possible to pour out the liquid content. This series of operations can be easily performed using fingers.

[0087] In this way, according to the present invention, it is possible to provide a bag-in-box which is a double container consisting of a paper container on the outside and an inner bag with a spout and made of a plastic film as a base on the inside, and which can be easily opened by opening part of the paper container and pulling the spout out to the outside of the paper container and securing it in place. [Explanation of symbols]

[0088] 1...Arrow 2...Arrow 3... Arrows 4... Arrows 5...Arrows 6... Arrows 7. Arrow 8...Arrows 9...Arrow 10...Outer box 11 Bottom 12...Front body 13 Left side torso 14...Right side torso 15 Rear torso 16 Top 17. Slope 19... Perforation 20...Circular perforations 21... Ridge perforations 22. Flap 23...Knob part 24... Perforation 25 Mountain fold line 26 Mountain fold line 27 Mountain fold line 28 Mountain fold line 29 Mountain fold line 30···Notched flap 31 Mountain fold 32 Cutout 33···Notched flap 34 Notch 35 Mountain fold line 36···Flap 37 Slit 50...Inner bag 51···Spout 100···Bag in box

Claims

[Claim 1] A double container consisting of an outer box made of paper and an inner bag made of a plastic film as a base material, The outer box has a rectangular parallelepiped shape, and the inner bag has a spout and can store liquid. The spout has a groove at its base for fixing to the outer box, The outer box consists of six surfaces: the top, front body, left body, right body, rear body, and bottom. The top surface is made up of three overlapping layers, The innermost layer of the top surface has a flap with a notch that continues from the left and right sides of the body, folded inward at right angles from the left and right and butted together. The cutout is provided in the center of the flap, on the front body side of a mountain fold line extending in the left-right direction of the outer box, The middle layer of the top surface has a flap that continues from the rear body and is folded at a right angle from the back to the front. A slit is formed on the ridge between this flap and the rear fuselage. The outermost layer of the top surface is made up of a flap that continues from the front body and a tab that continues from it, folded at a right angle towards the back and overlapping each other. There is a circular perforation at the top of the front body that can be cut out. Between the upper part of the front body and the upper parts of the left and right body, perforations are provided along the ridge line to form an outer box; When removing the liquid content, the handle is gripped with fingers and pulled forward to tear the perforation of the ridge line, cutting the tearable circular perforation of the front body to form an opening; The intermediate layer flaps continuing from the rear torso section are raised backward to expose the innermost layer flaps with cutouts continuing from the left and right torso sections; The notched flap is folded downward toward the front fuselage at the central mountain fold line, forming a slope from the top surface down to the front fuselage. Place the left and right sides of the torso on top of this slope, and fold the upper front corners of the torso inwards from the left and right. The notches of the innermost layer flaps continuing from the left body section and the right body section are sandwiched and fixed in the grooves of the spouts of the inner bag contained inside the outer box; The spout is exposed by protruding from the circular opening to the outside of the outer box; Furthermore, the flap continuing from the front body and the knob continuing from it are placed on the slope and the top surface to make the outer box into a seven-sided shape with a slope. The tab is inserted into the slit on the ridge between the flap continuing from the rear body section and the rear body section, and fixed thereto; A bag-in-box that allows the liquid content to be poured out.

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