JPH10273168A - Liquid packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent side plates of an outer box from swelling when a product causing an internal pressure is received by constituting a liquid container for receiving an inner bag of the rectangular outer box with its body comprising four side plates and an inner parallelopipe made of a corrugated fiberboard and by providing a gap between the inner parallelopipe and the side plates of the outer box. SOLUTION: The liquid packaging container R1 for receiving an inner bag P1 made of plastic rich in flexibility with fluid such as liquid or powder sealed comprises an inner parallelopipe B1 with a rectangular body put in a rectangular outer box A1 with its body comprising A11 to A14. The inner parallelopipe B1 is formed by joining both ends of a corrugated fiberboard sheet, wherein an outer size of each side wall of the inner parallelopipe B1 is made to be shorter than a corresponding inner size of the outer box A1 so that a gap is interposed between the outer box A1 and each side wall of the inner parallelopipe B1. Thus even if the side wall of the inner parallelopipe B1 deforms due to an internal pressure of an inner bag P1 containing liquid, the deformation is absorbed by the gap thereby preventing side walls of the outer box A1 from expanding, that is preventing the liquid packaging container R1 from swelling at the body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging container in which an inner bag or the like containing liquid or fluid powder or granules is stored in an outer box.

[0002]

2. Description of the Related Art Conventionally, when storing or transporting a liquid or fluid powder or granules (hereinafter referred to as a liquid, etc.), the liquid or the like is stored in a plastic inner bag, and the inner bag is further made of cardboard. A liquid packaging container housed in an outer box made of paper or paperboard is used. These liquid packaging containers are called back-in-boxes, and their demand is expanding because they are lighter in weight than drums and the like, and are easier to dispose of.

[0003] In the above-mentioned liquid packaging container, since the internal pressure of the liquid or the like in the inner bag is directly applied to the inner side wall of the outer box, a high strength outer package is required to prevent blistering and to suppress buckling of the box. There was a problem that a box had to be used. That is, if the strength of the side plate of the outer box is not sufficient, there is a problem that the side plate is bent outward, that is, a so-called bulge or the side plate buckles when products are stacked. In order to solve this problem, U.S. Pat. No. 4,056,223 discloses a storage container provided with reinforcing members to increase the strength.

However, also in this liquid packaging container, since the internal pressure of the inner bag is directly applied in the direction of expanding the side wall, the blister of the side plate cannot be fundamentally solved. Therefore, it is necessary to use a strong outer box also in this storage container. By the way, such a high-strength outer box has a high manufacturing cost, and cannot be easily folded when discarded, and is difficult to dispose.

Japanese Patent Application Laid-Open No. Hei 7-315436 discloses that the bottom 4
A square paper inner cylinder made of cardboard or paperboard is disposed inside a paper outer box having four side plates connected to the sides, and one side of the inner cylinder is connected to the outer box by After arranging obliquely between adjacent side plates, and fixing both ends of the oblique side to the inner surface of the adjacent side plate, the inside of the inner cylinder has a flexibility equal to or larger than the diameter of the inner cylinder. It features a soft plastic inner bag provided.

However, the internal pressure of the inner bag housed in the liquid packaging container pushes and spreads the side not joined to the inner cylinder, but also pushes the side of the inner cylinder joined to the outer box. That is, since it is applied in the direction of expanding the inner wall of the outer box, the blister of the side plate cannot be fundamentally solved. In addition, since it is an essential condition that the outer box and the inner cylinder are joined with an adhesive or the like, the actual process of box making becomes complicated, and mass production requires automatic box making. Requires a dedicated high-precision machine. Therefore, it is not suitable as a large-capacity liquid packaging container.

[0007] Japanese Patent Application Laid-Open No. 8-282735 discloses a square outer box having a bottom part and a lid and a body part formed of four outer plates, an n-sided frame mounted inside the outer box, By holding a support plate between the side plate of the frame and a side plate corresponding to the frame of the outer box, it is attempted to prevent blistering. However, since the internal pressure of the inner bag of this liquid packaging container is applied in the direction of pushing and expanding the inner wall of the outer box via the supporting plate sandwiched between the side plate of the frame and the inner plate, the blister of the side plate of the outer box is fundamentally removed. It cannot be solved. Therefore, it is necessary to use a high-strength outer box also in this liquid packaging container.

The blister amount of the liquid packaging container depends on the stacked load and the internal pressure of the liquid or the like stored in the container, but the influence of the internal pressure is particularly large. In other words, even if the container does not cause blistering with a general stacking load,
Blistering occurs when liquid is stored. In addition, blistering tends to occur as the size and capacity of the container increase. That is, since the bending strength of a plate such as a corrugated cardboard sheet is inversely proportional to the distance, as the capacity of the container increases, the liquid packaging container requires a higher strength container.

[0009]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide a liquid packaging container capable of preventing a side plate of an outer box from being blistered even when a product generating internal pressure is stored. .

[0010]

That is, a first invention of the present invention is a liquid container for storing an inner bag filled with liquid, wherein a body having a bottom and a lid has four side plates. A liquid packaging container formed from a square outer box and a square inner cylinder mounted inside the outer box, wherein the inner cylinder comprises four continuous side plates of a corrugated cardboard sheet, and its flutes The present invention relates to a liquid packaging container which is arranged perpendicular to a direction and has a gap between an inner cylinder and an outer box side plate.

According to a second aspect of the present invention, there is provided a liquid container for storing an inner bag filled with liquid, comprising a square outer box having a bottom part and a lid part and a body part comprising four side plates. A liquid packaging container formed from an octagonal inner cylinder mounted inside an outer box, wherein the inner cylinder comprises eight continuous corrugated cardboard side plates, the flutes of which are orthogonal to the vertical direction. The present invention relates to a liquid packaging container which is disposed in such a manner that a gap exists between an inner cylinder and an outer box side plate.

Further, according to a third invention of the present invention, a flap is continuously provided on one or both sides of the inner cylinder side plate of the first invention and the second invention, and the width of the flap in the height direction is equal to the height of the outer box. The present invention relates to a liquid packaging container in which the flap is bent between the side wall of the outer case and the side wall of the inner cylinder within 30% of the dimension in the direction.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The feature of the present invention resides in that the flute direction of the corrugated cardboard sheet used for the inner cylinder is used perpendicular to the vertical direction of the outer box. By doing so, the pressure resistance of the inner cylinder itself is weak, but it exerts an extremely large effect on blistering, and the pressure resistance can be sufficiently increased by arranging the flutes of the side plates of the outer box in the vertical direction.

A so-called liquid packaging container in which a liquid is placed in a soft packaging bag such as a plastic bag and stored in a packaging container made of a corrugated cardboard is used because the side wall of the container is pushed outward due to the internal pressure of the stored liquid. Blistering is easy to occur. Blistering vessels have reduced pressure strength, which results in blistering. For this reason, the most common method of strengthening the torso is the so-called double structure in which the inner cylinder is mounted inside the outer box, but since the emphasis is usually on dealing with pressure resistance, the flute is used in the vertical direction And were not used orthogonally.

A feature of the present invention resides in that a gap exists between the inner cylinder and the outer case side plate. The size of the gap varies depending on the shape and size of the box and the inner cylinder, the type of the corrugated cardboard sheet, and the like. However, when the inner cylinder is rectangular, the outer dimension of the inner cylinder corresponding to the inner dimension of the outer box is larger than 90%. Make it smaller than 99%. When the inner cylinder is an octagon, the outer dimension of the inner cylinder corresponding to the inner dimension of the outer box is set to be larger than 90% and smaller than 98%.

That is, when the inner size of the outer box is small, the corresponding outer size of the inner box is small, so that the bending strength is high and there is almost no distortion of the side wall due to the internal pressure. If the dimension becomes longer, distortion occurs, which acts to push the side wall of the outer box and spreads, causing blisters. Therefore, a gap is provided between the inner wall of the outer box and the outer wall of the inner box so that the distortion of the side wall of the inner cylinder caused by the internal pressure does not affect the side wall of the outer box, and the distortion is absorbed by the gap to prevent blistering can do. In order to secure a gap between the outer case and the inner case, it is possible to make the outer size of the corresponding inner cylinder smaller than the inner size of the outer case.

When the liquid packaging container of the present invention is made, the blister is prevented while keeping the actual internal volume as large as possible. Therefore, the outer cylinder having a length less than the circumference of the circle inscribed in the side wall of the outer box does not satisfy the object. That is, the area ratio of the area of the square to the circle inscribed in the square is approximately 80%. In order to reduce the area of the reduced square to 80%, one side of the reduced square is approximately 90% of the original square. If the length of one side of the reduced rectangle is smaller than this, the area of the circle inscribed in the rectangle, which is another measure for preventing blistering, becomes smaller, and the advantage of using the rectangle for the inner cylinder is eliminated. As described above, the outer dimension of the inner cylinder does not exceed 99% of the inner dimension of the corresponding outer box, and needs to be longer than 90%.

It is necessary that the corrugated cardboard sheets on the side walls forming the inner cylinder are connected to each other. That is, each side wall of the inner cylinder is connected to an adjacent side wall by some means. The most common method is to form a ruled line on a predetermined portion of a horizontally long corrugated cardboard sheet in the flute direction with one continuous corrugated cardboard sheet, bend the ruled line portion into an inner cylinder shape, and glue both ends of the sheet. , Stapling, bonding with a gum tape, or the like.

If all the adjacent side walls of the inner cylinder are not continuous, the bending strength of the flute perpendicular to the vertical direction is not sufficiently exerted, which causes blistering. In addition, the substantial outer dimension of the side wall of the inner cylinder becomes longer, and the side wall of the outer box is pushed open. Further, the inner wall is bent in parallel with the flute due to the internal pressure, causing the body to bulge.

As the inner size of the outer box becomes longer, the side wall of the inner cylinder corresponding thereto becomes longer. Therefore, when the outer dimension of the side wall of the inner cylinder is long, the outer dimension of each side wall of the inner cylinder is shortened, and a ruled line is formed at a predetermined position, and the inner cylinder is mounted as an octagonal inner cylinder. By making the inner cylinder an octagon, the length per one of the eight side walls is reduced, and as a result, the bending strength is improved. That is, if the side wall length becomes half of the original length, the bending strength doubles, and if it becomes one third of the original length, the bending strength increases three times, and the bending strength can resist internal pressure. become. In addition, the bending angle when making an octagon has little effect on bending strength,
An important factor is whether or not the sheet is folded by the ruled line.

Although the height of the box of the conventional liquid packaging container could not be increased due to the internal pressure, the height of the box can be increased more than ever by mounting the octagonal inner box. Therefore, the degree of freedom in designing the liquid packaging container is greatly increased.

Further, in the present invention, flaps are continuously provided on one side or both sides of the inner cylinder side plate, and the flaps are bent to the outside of the inner cylinder through ruled lines or cut lines, so that the side wall of the outer box and the side wall of the inner cylinder are formed. By arranging them between them, it is possible to ensure a gap between the outer box and the inner cylinder, and to further improve the blister prevention effect. In addition, the flap provided continuously on the side wall is inserted between the outer box and the inner cylinder, and the flute near the upper and lower ends of the inner cylinder has a double structure in the direction orthogonal to the top and bottom Therefore, there is an effect that the bending strength is improved.
Whether the flap is on one side or both sides is the size of the box,
It can be arbitrarily determined according to the material of the corrugated cardboard sheet.

It is desirable that the width of the flap in the height direction be within 30% of the inner size of the outer box in the height direction. That is, the blister due to the internal pressure of the stored liquid or the like occurs near the center of the outer box, but the width of the flap in the height direction is 30%.
%, It becomes close to the blister generation portion, and the element of the flap as a spacer becomes small.

In the liquid packaging container according to the present invention, various general cardboard sheets can be used as they are depending on the weight and capacity to be stored in the liquid packaging container. That is, a relatively small amount of liquid packaging container having a capacity of about 10 to 30 liters can use an A-flute corrugated cardboard sheet for both the outer casing and inner cylinder. In the case of about 30 to 200 liters, double-faced cardboard such as AB flute can be used. For large containers such as 1 cubic meter, by using high-strength corrugated cardboard such as 2A flute or 3A flute, it is possible to easily prevent blistering due to pressure resistance and internal pressure. Further, since it is not necessary to consider the influence of the internal pressure on the outer box, the strength of the box may be designed based on the load in a multi-stage stack. The pressure resistance of the entire liquid packaging container is the sum of the strength of the outer box and the inner cylinder.If the inner cylinder has a pressure resistance higher than that required to prevent blistering, the margin strength is Can be added.

The outer box of the present invention has a general box shape A
Since the corrugated cardboard box and the C-type corrugated cardboard box can be used as they are, they are highly versatile and do not require extra capital investment. Further, since the inner cylinder is merely formed in a cylindrical shape slightly smaller than the inner size of the outer box, a general-purpose can-making machine such as an A-type corrugated cardboard box may be used, so that the inner cylinder can be easily manufactured.

The liquid packaging container of the present invention can be applied to not only liquid but also fluid powder and fluid.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. 1, 2, 6, and 7 show perspective views of the present invention during assembly, FIGS. 3 and 8 show exploded views of the outer case A of the present invention, and FIGS. 4 and 9 show the present invention. FIG. 5 shows a development view of the inner cylinder, and FIG. 5 shows a sectional view of FIG. 1 taken along the line YY. FIG. 10 is a horizontal sectional view of the body of the liquid packaging container P3 according to the third embodiment of the present invention, FIG. 11 is a vertical sectional view of the same body, and FIG. 12 is a developed view of the inner cylinder.

As shown in FIGS. 1 and 2, the liquid packaging container R1 of the first embodiment has a body portion of A11, A12, A13, A14.
A square outer cylinder A made of a square outer cylinder A
1 is attached. Further, the outer box A1 is a wrap round type cardboard box, and is manufactured by a normal method. The inner cylinder B1 is formed by joining both ends of a corrugated cardboard sheet shown in a developed view of FIG. The liquid packaging container R1 houses a flexible plastic inner bag P1 in which a fluid such as liquid or powder is sealed. FIG. 3 is a development view of the outer case A1, and FIG. 4 is a development view of the inner cylinder B1. FIG.
FIG. 2 is a cross-sectional view of the liquid packaging container R1 of FIG. 1 taken along the line YY. As is clear from FIG.
A gap S1 is formed between the inner cylinder B1 and each side wall of the inner cylinder B1. This is because the outer dimensions of each side wall of the inner cylinder B1 corresponding to the inner dimensions of the outer box A1 were designed and manufactured to be shorter. Even if the side wall of the inner cylinder B1 is distorted due to the internal pressure of the liquid inner bag P1 due to the gap S1, the distortion is absorbed by the gap S1 and the side wall of the outer box A1 is not pushed out. I will not do it.

The total outer dimension of the inner cylinder B1 is designed to be longer than 90% of the total inner dimension of the outer box A1 and smaller than 99%. The outer dimension of each side wall of the inner cylinder B1 is designed to be shorter than the inner dimension of each side wall of the corresponding outer box A1. The dimension of the inner cylinder B1 in the height direction is shorter than the inner dimension of the outer box A1 in the height direction, and is about the same height as the position for holding the inner flap when the flap of the outer box A1 is closed.

The side wall of the inner cylinder B1 has the flutes of the corrugated cardboard sheet arranged perpendicular to the vertical direction of the liquid packaging container R1 as shown by the partial cutout in FIG.
Further, since the inner cylinder B1 is made of one continuous corrugated cardboard sheet, the bending strength is extremely high as compared with the case where the flute is parallel to the vertical direction, and a large internal pressure is required to buckle and crush the inner cylinder B1. As a result, the outer box A1 has a reduced risk of bulging.

As shown in FIGS. 6 and 7, a liquid packaging container R2 according to another embodiment of the present invention has a body portion of A2.
1, A22, A23, A24
(Corrugated cardboard box) A2 is provided with an inner cylinder B2 having a body octagonal cylindrical shape, and a flexible plastic inner bag P2 sealed with a liquid or the like is stored in the liquid packaging container R2. FIG. 8 is an exploded view of the A-type cardboard box A2, which is assembled by a normal assembling method. FIG. 9 is a development view of the octagonal inner box B2. The side wall B21 of the inner cylinder B2 is
Corresponding to the two side walls A21, A22, A23, A24, B23 of the inner cylinder B2 forms an oblique side wall.

The total outer dimension of the inner cylinder B2 is designed to be longer than 90% of the total inner dimension of the outer box A2 and smaller than 98%. The outer dimensions of each side wall of the inner cylinder B2 are designed to be shorter than the inner dimensions of the corresponding side walls of the outer box A2. The dimension of the inner cylinder B2 in the height direction is shorter than the inner dimension of the outer box A2 in the height direction, and is about the same height as the position where the inner flap is held when the flap of the outer box A is closed.

When the dimensions of the outer boxes of Example 1 and Example 2 are the same, the liquid packaging container R2 of Example 2 in FIG. 6 has an octagonal inner cylinder B2, and each octagonal side wall has 2, two ruled lines are formed on both sides of a ruled line forming each side wall of the rectangular inner cylinder B1 mounted on the liquid packaging container R1 of the first embodiment of FIG. And the bending strength of each side wall of the inner cylinder B2 of R2 is R
It becomes stronger in inverse proportion to the size of the corresponding side wall of one inner cylinder.
Therefore, the liquid packaging container R2 is less likely to bulge than R1. However, the capacity of the box is reduced by the reduction in the size of the inner cylinder. 9, the flute direction of the inner cylinder B2 is arranged orthogonal to the vertical direction.

Another embodiment 3 is shown in FIGS. The liquid packaging container R3 of the third embodiment is a rectangular liquid packaging container in which the aspect ratio of the outer box A3 is increased, and an octagonal inner cylinder B3 is mounted on the rectangular outer box A3.
3, flaps are continuously provided on both sides of the inner cylinder side plate, that is, flaps C31 to C31 are provided at the upper ends of the positions corresponding to the side walls of the outer box A3.
34 and flaps C31 to C34 are arranged at the lower end.

FIG. 10 is a horizontal sectional view of the body of the liquid packaging container R3, and FIG. 11 is a vertical sectional view of the body. FIG. 12 is a development view of the inner cylinder B3 shown in FIGS. 10 and 11, and a flap C31 is provided at the upper end of the side wall B31 of the inner cylinder B corresponding to the longitudinal side wall A31 of the outer box A3, and a flap C31 is provided at the lower end. The flap C31 is arranged, and the side wall A in the short direction of the outer box A3
The flap C32 is arranged at the upper end of the side wall B32 of the inner cylinder B3 corresponding to F.32, and the flap C32 is arranged at the lower end. Each of the flaps C31 to C34 is folded between the side wall of the outer box A3 and the side wall of the inner cylinder B3 to serve as a spacer for forming a gap S3.

The gap S3 is reliably secured between the outer box A3 and the inner cylinder B3 by the flaps C31 to C34. The internal pressure of the plastic bag P3 (not shown) housed in the liquid packaging container R3 is secured by the gap S3. Inner cylinder B3 generated by
Is absorbed by the gap S3, and the outer box A
Therefore, the liquid packaging container R3 (not shown) has a great effect in preventing blistering. Further, the stress that tries to spread outward suppresses blistering due to the drag of the flap and its effect as a spacer. The size of the gap S3 between the inner wall of the outer box and the outer wall of the inner box is
It is preferable to make the thickness larger than the thickness of the inner cylinder side plate.

The sum of the outer dimensions of the inner box B3 in the liquid packaging container R3 is designed to be longer than 90% of the total inner dimension of the outer box A3 and smaller than 98%. The outer dimensions of each side wall of the inner cylinder B3 are designed to be shorter than the inner dimensions of the corresponding side walls of the outer box A3. The dimension of the inner cylinder B3 in the height direction is shorter than the inner dimension of the outer box A3 in the height direction, and is about the same height as the position for holding the inner flap when the flap of the outer box A3 is closed.

As shown in FIG. 10, the liquid packaging container R3 of the third embodiment is equipped with a rectangular outer box A3 and a substantially rectangular octagonal inner cylinder B3. The width from the ruled line attached to the octagonal longitudinal side wall of the inner cylinder B3 is set to a length close to the length of the lateral side wall. That is, the effect of the ruled line is small when the length is close to the length in the longitudinal direction, and the capacity is reduced when the length is shorter than the length in the short direction.

In the third embodiment, the flaps are arranged on all the side walls of the inner cylinder B3 corresponding to the side walls of the outer box A3. However, the flaps can be appropriately reduced depending on the size of the outer box A3, the material of the corrugated cardboard sheet to be used, and the like. That is, as shown in FIG. 12, the flaps of the inner cylinder may be attached to all corresponding sides of B31 and B32, or C31 and C33, or C32 and C33.
A pair such as 34 may be used. Pairs are preferred.
In FIG. 12, the flaps are provided at both upper and lower ends. However, the flaps may be provided only at the upper end or only at the lower end. Also, it may be attached every other like C31 and C33. Further, as shown in a development view of the inner cylinder in FIG. 12, the flute direction of the inner cylinder B3 is arranged orthogonal to the vertical direction.

[0040]

As described above, in the liquid packaging container of the present invention, even when the inner bag filled with liquid is stored, the blister caused by the internal pressure is formed by the gap formed between the side wall of the outer box and the side wall of the inner cylinder. Because it can be absorbed, the outer box does not bulge due to internal pressure.

Furthermore, since the flute of one continuous cardboard sheet with a continuous inner box is used perpendicular to the vertical direction of the box, the inner cylinder has a high bending strength and does not easily buckle or crush. The amount is also small.

Furthermore, since the inner wall of the inner cylinder is formed in an octagon, the length of one side of the inner wall is shortened, whereby the bending strength can be increased. Therefore, the inner wall is not easily buckled or crushed. The amount of distortion can be reduced.

Further, by arranging the flap between the side wall of the outer box and the side wall of the inner cylinder, a gap can be reliably secured between the outer box and the inner cylinder. In order to prevent the outside from spreading, the bending strength is increased, the buckling is not easily buckled or crushed, and the amount of distortion is reduced.

The outer box is a general-purpose A-type cardboard box or C type.
A wrap round type box can be used, and since the inner cylinder is a simplified version of the A type cardboard box, it can be easily manufactured similarly. In addition, since the outer box and the inner cylinder can be easily folded, transport storage or disposal after use is easy, and the space of the storage place can be reduced. In addition, since the outer box and the inner cylinder can be manufactured separately, the material can be changed according to the storage amount of the liquid and according to the size of the box, that is, according to the strength, so from a liquid packaging container as small as about 10 liters, It can easily handle large liquid packaging containers of 1 m ³ or more.

Since the size of the inner cylinder is smaller than that of the outer box, the inner cylinder can be easily mounted on the outer box, and the mounting can be easily automated.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention during assembly.

FIG. 2 is a perspective view of the first embodiment of the present invention during assembly.

FIG. 3 is a development view of the outer box A according to the first embodiment of the present invention.

FIG. 4 is a development view of the inner cylinder B of the first embodiment of the present invention.

FIG. 5 is a sectional view taken along line YY of FIG. 1;

FIG. 6 is a perspective view of a second embodiment of the present invention during assembly.

FIG. 7 is a perspective view of a second embodiment of the present invention during assembly.

FIG. 8 is a development view of an outer box A according to a second embodiment of the present invention.

FIG. 9 is a development view of an inner cylinder B according to a second embodiment of the present invention.

FIG. 10 is a horizontal sectional view of a trunk portion according to a third embodiment of the present invention.

FIG. 11 is a vertical sectional view of a trunk portion according to a third embodiment of the present invention.

FIG. 12 is a development view of an inner cylinder B according to a third embodiment of the present invention.

[Explanation of symbols]

 A1, A2, A3 ... outer box a ... outer box flap B1, B2, B3 ... inner cylinder C31, C32, C33, C34 ... inner cylinder flap R ... liquid packaging container S1, S2, S3 of the present invention … Gap between the outer box side wall and the inner cylinder side wall P1, P2… Inner bag

Claims (3)

[Claims] 1. A liquid container for storing an inner bag filled with liquid, wherein a body having a bottom and a lid is mounted in a square outer box composed of four side plates, and inside the outer box. A liquid packaging container formed of a rectangular inner cylinder, the inner cylinder being composed of four continuous side plates of corrugated cardboard sheets, the flutes of which are arranged orthogonally to the top and bottom directions, and the inner cylinder and the outer cylinder. A liquid packaging container having a gap between box side plates. 2. A liquid container for accommodating an inner bag filled with liquid, wherein a body having a bottom and a lid is mounted in a square outer box composed of four side plates, and inside the outer box. And an octagonal inner cylinder, wherein the inner cylinder comprises side plates of eight continuous cardboard sheets, the flutes of which are arranged orthogonally to the top and bottom directions, and A liquid packaging container having a gap between outer box side plates. 3. A flap is continuously provided on one or both sides of the inner cylinder side plate, and a width in a height direction of the flap is within 30% of a dimension in a height direction of the outer box. The liquid packaging container according to claim 1, wherein the liquid packaging container is bent between the side wall and the side wall of the inner cylinder.