JP6363839B2 - Liquid storage container - Google Patents

Description

  The present invention relates to a liquid storage container that is surrounded by four side surfaces and has a spout provided above one of the side surfaces.

  Examples of containers for storing liquid products include bottles, cans, plastic bottles, and paper containers. In recent years, paper containers have been used in various fields because of increased recycling awareness and consumer-oriented low prices. The paper container can be deformed (ie, folded) from a three-dimensional shape to a planar shape after the liquid content is gone, so it can be easily collected and discarded. It is a container. The paper container is known by a name such as Tetra Pak (registered trademark) or milk carton.

  The paper container itself is made lightweight, but if the container is filled with liquid, it is heavy to hold with one hand, and for example, it may be difficult for a child or woman to hold. Also, when pouring the liquid, the hand holding the paper container may be unbalanced and the liquid inside may be spilled. Such a problem becomes particularly noticeable when the size of the paper container increases and the weight of the liquid filled in the container is large. Moreover, in the case of a large paper container, since it is bulky in the height direction, it may be difficult to store in a refrigerator or the like.

  Conventionally, there has been a liquid paper container provided with a portion to which a finger is hung (see, for example, Patent Document 1) as an improvement in gripping property of a paper container. In the liquid paper container of Patent Document 1, a recess is provided on a ridge line formed by two side walls, and a finger is placed on the recess to improve ease of holding.

  In addition, there has been a paper container configured to be capable of being reduced in the height direction as the liquid in the container decreases (see, for example, Patent Document 2). In the paper container of Patent Document 2, when the amount of contents is reduced, if the crease guide line provided on the side surface of the paper container is made into a mountain fold and / or a valley fold, a part of one side is inward of the paper container At the same time as being recessed, a part of the side surface different from the side surface protrudes outward from the paper container. The portion protruding outward of the paper container is bent upward or downward and is brought into close contact with the side surface of the paper container. In this way, the paper container is reduced in the height direction, and can be stored in a limited storage space.

No. 3-20257 JP 2012-140164 A

  However, the liquid paper container of Patent Document 1 is merely a concave portion provided at a part of four corners formed by the intersection of adjacent side walls. When the width direction spreads, it becomes difficult to align the finger with the recess. In addition, since the depth of the recess cannot be adjusted, it may be difficult for a woman or child with a small hand to hold the liquid paper container. Furthermore, since the liquid paper container cannot be reduced in the height direction by folding the recess, there is a problem that the storage efficiency is inferior.

  On the other hand, although the paper container of Patent Document 2 can be reduced in the height direction, if the crease guide line provided on the side surface is fold-folded and / or valley-folded, a part of one side surface of the paper container At the same time as the recess is inward, a part of the side surface that is different from the side surface protrudes outward from the paper container. It is necessary to suppress the protruding portion by covering from above. As described above, the paper container of Patent Document 2 still has a problem regarding ease of holding even after being reduced in the height direction.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a liquid storage container that enables reduction in the height direction while having both ease of holding and ease of pouring.

The characteristic configuration of the liquid container according to the present invention for solving the above problems is as follows:
A liquid storage container that is surrounded by four side surfaces and has a spout provided above one of the side surfaces,
Three parallel folds are provided across the four sides,
Further, on one side surface of the four side surfaces and the side surface opposite to the side surface, two right-angled isosceles triangle folds are formed between the two edges of each side surface and the right-angled two sides between the three parallel folds. It is provided on both sides so that the hypotenuse of the equilateral triangle is shared,
When four side surfaces are folded according to all the creases, a part of each side surface is recessed inward so as to form a constricted portion, and the upper and lower portions of each side surface constitute the same plane via the constricted portion. is there.

According to the liquid container of the present configuration, three parallel folds that cross the four side surfaces are provided, and one of the four side surfaces and the side surface that faces the side surface are provided with the 3 Two right-angled isosceles triangle folds are provided on both sides so that both edges of each side face and the hypotenuse of the right-angled isosceles triangle are shared between the parallel folds of the book. When all of these folds are folded according to a predetermined folding method, the side surface provided with two right-angled isosceles triangle folds is the right-angled isosceles triangle when three parallel folds are recessed inward. The hypotenuse fits exactly between three parallel folds while being folded in a bisection. The side surface where the right-angled isosceles triangle crease is not provided is folded while three parallel creases are recessed inward. As a result, constrictions are formed on the four side surfaces. Here, the constricted portion formed on the side surface where the crease of the right isosceles triangle is not provided and the side surface facing the side surface is particularly referred to as a “constricted portion for the handle”. If a finger is put on the constricted portion for the handle, it can be used as the handle portion of the liquid storage container. For this reason, even if it is a large-sized liquid storage container, it becomes easy to hold and can stably pour the content liquid. In addition, the constricted part formed on the four side surfaces can be adjusted to fit the user's hand by adjusting the dent according to the size of the user's hand, the length of the finger, or how to hold it, etc. Even when different users have liquid storage containers, it can be configured in an optimum state according to each person. As described above, the fold provided in the liquid storage container having this configuration is a simple configuration including three parallel folds and two right-angled isosceles triangle folds, depending on the user and usage conditions. Therefore, it is possible to provide a liquid storage container that is highly convenient.
In addition, according to the liquid container of the present configuration, when the four side surfaces are completely folded according to all the folds, a part of each side surface is recessed inward so as to form a constricted portion, and the constricted portion is interposed therebetween. The upper and lower portions of each side constitute the same plane. In other words, in three parallel folds crossing the four side surfaces, the fold located at the top and the fold located at the bottom in the height direction of the liquid storage container are folded so that the constricted portion is The height of the liquid storage container is reduced only by the formed portion. Therefore, the height of the liquid storage container can be reduced as the liquid in the liquid storage container decreases. At this time, it is not necessary to cover the side surface of the liquid storage container with a ring-shaped object as disclosed in Patent Document 2, and the height of the liquid storage container can be easily reduced simply by folding according to the fold. As described above, the liquid storage container of this configuration makes it easy to secure a storage space in the height direction, and can recognize at a glance that the height of the liquid storage container is reduced. It can also be used as a mark that the liquid in the storage container is reduced.
In addition, when the liquid storage container is disposed or recycled after the end of use, it is bulky if it is in a three-dimensional shape, so it is common to collect the liquid storage container in an opened state opened with a cutter knife, Conventionally, there has been a problem that a large-sized liquid storage container is difficult to open. However, the liquid storage container having this configuration can be used as a guide for opening the creases provided on the four side surfaces. That is, the liquid container can be easily developed by making a cut along the fold line with a cutter knife or the like. For this reason, even when the size of the liquid storage container is large, the liquid storage container can be easily developed from a three-dimensional shape, and the liquid storage container can be discarded and collected smoothly.
Furthermore, since the liquid storage container in which the constricted part is formed has a unique shape, it can be said that it is excellent in design. Therefore, when the liquid storage container of this configuration is adopted as the container for the liquid product, the consumer can visually recognize the target product depending on the shape of the liquid storage container, and can be differentiated from other products. . As described above, the liquid storage container of this configuration can also contribute to the improvement of product discrimination.

In the liquid container according to the present invention,
It is preferable that the creases of the right isosceles triangle are provided on the side surface on the side where the spout is provided and on the side surface opposite to the side surface.

  According to the liquid storage container of the present configuration, the crease of the right isosceles triangle is provided on the side surface on the side where the pouring spout is provided and on the side surface facing the side surface. It is possible to easily hold the finger by aligning the fingers with the constricted portion formed on the two side surfaces adjacent to the side surface, that is, the constricted portion for the handle. Thereby, the balance of the hand holding the liquid storage container becomes good, and the liquid inside can be poured without spilling.

In the liquid container according to the present invention,
The crease of the right isosceles triangle is 1b / 15, where a is the height when the hypotenuse of the right isosceles triangle is the base, and b is the width of the side surface on which the crease of the right isosceles triangle is provided. It is preferable to be provided so as to be in a range of ≦ a ≦ 1b / 2.

  According to the liquid container of this configuration, by setting the size of the crease of the right-angled isosceles triangle within the above optimal range, the constriction of the constricted portion can be adjusted according to the size of the user's hand and the length of the finger. Adjust and make it easier to hold.

In the liquid container according to the present invention,
In the three parallel folds, the height of the four side surfaces is x, and the length from the upper end of the four side surfaces to the fold located at the center of the three parallel folds is y. It is preferably provided so as to be in the range of 1x / 8 ≦ y ≦ 7x / 8.

  According to the liquid container of this configuration, by setting the position of the three parallel folds within the above optimal range, a constricted portion can be formed at a position that is easy for the user to hold, and more liquid can be poured. Can be made easier.

In the liquid container according to the present invention,
It is preferable that a plurality of the constricted portions are provided.

  According to the liquid storage container of this configuration, since a plurality of constrictions are provided, the user can hold the liquid storage container at his / her preferred position and adjust the degree of depression for each constriction. Further, when there are a plurality of users of the liquid storage container, it is possible to select a constricted portion at a position that is easy to hold according to each person. Furthermore, when the folds of the plurality of constricted portions are completely folded, the height of the liquid storage container can be further reduced, so that it is easy to secure a storage space in the height direction of the liquid storage container.

In the liquid container according to the present invention,
At least one constricted portion of the plurality of constricted portions has a pair of opposed side surfaces provided with a right-angled isosceles triangle fold, and a pair of opposed side surfaces provided with a right-angled isosceles fold. It is preferable to be provided so as to be different from the side surface.

  According to the liquid container of this configuration, by providing the fold as described above, the constricted portion for the handle is provided on the side surface on the side where the spout is provided and on the side surface facing the side surface. Become. For this reason, it is possible to meet the user's needs that it is easier to pour the one having the side surface on which the spout is provided and the side surface facing the side surface, and provide a liquid storage container that is easy to use for more people. can do.

In the liquid container according to the present invention,
The plurality of constricted portions are preferably provided so as to be adjacent to each other in the height direction of the four side surfaces.

  According to the liquid storage container of this configuration, since the plurality of constricted portions are provided adjacent to each other, even when the liquid storage container is held with one hand, all fingers of the hand can be aligned with the constricted portion. it can. Thereby, it becomes easy to have a constriction part and can pour a liquid more stably.

In the liquid container according to the present invention,
The fold line is preferably composed of a plurality of fold lines.

When the liquid storage container is folded according to a predetermined folding method as described above, the fold becomes a mountain fold or a valley fold, and a corner having the fold as a vertex is formed. The sharper the angle, the more the apex protrudes, and the side surface of the liquid container may be broken at that portion. Further, since the material constituting the liquid storage container approaches the crease at the apex, the thickness of the material increases in the vicinity of the fold, and there is a possibility that the side surface is difficult to be folded due to the thickness. If the side surface is forcibly folded in such a state, the desired constricted portion is not formed, and the appearance of the container may be inferior.
Therefore, in order to avoid the above problems, the folds provided in the liquid storage container are configured as a plurality of folding lines. “Multiple folding lines” means that each of the three parallel folds and the right-angled isosceles crease provided in the liquid storage container is composed of two or more lines instead of one line. means. With such a plurality of folding curves, when the fold is made into a mountain fold or a valley fold, the side surfaces can be folded so as to form several surfaces while dispersing the angles. The corners formed by the folds do not protrude at the apex as described above, so that the side surface of the liquid storage container can be hardly broken. Further, since the angles are dispersed, the direction in which the material constituting the side faces is also dispersed. For this reason, the thickness of the material does not increase only in the vicinity of the crease, and the thickness of the material can be maintained in a substantially uniform state. As a result, the side surface can be folded without applying excessive force, and a desired constricted portion can be formed, so that there is no possibility of impairing the design of the container.

In the liquid container according to the present invention,
The four side surfaces are configured in series, and a marginal portion is provided on one side edge portion of any one of the four side surfaces, and the marginal portion of the side surfaces adjacent to the side surface is provided. There is provided a margin affixing portion that is overlapped on the outer side of the marginal portion on a side surface that is in contact with the side edge on the side where the margin is provided, and a notch or a notch is provided in the fold provided in the margin affixing portion. Preferably there is.

As described above, the liquid storage container of the present configuration is provided with the margin portion on any one of the four side surfaces, and the margin pasting portion that is superimposed on the outer side of the margin portion on the side surface adjacent to the side surface. Is provided. And the above-mentioned crease is provided in the margin part and the margin pasting part. Since the marginal part and the marginal part are overlapped, the overlapped part is thicker than other parts in the side surface constituting the liquid storage container, and the crease provided in the marginal part is located at the marginal part. In order to overlap with the folds to be made, these folds are formed integrally. Therefore, when the side surface of the liquid storage container is folded according to the crease, the portion is thicker than the other side surface, so that it is difficult to fold. In such a case, since the crease provided in the marginal part (margin pasting part) is difficult to fold as desired, there is a possibility that the appearance of the constricted part looks inferior. In particular, when the crease provided in the margin pasting part (margin part) is a crease that forms a right-angled isosceles triangle, the side surfaces of the folds are finally formed through the constricted part formed by the crease as described above. Since it folds so that it may comprise the same plane, it becomes more difficult to fold as much as there is thickness. When the crease is a valley fold, the material of the liquid storage container is shifted to the vicinity of the crease provided in the marginal affixing portion, and the thickness of the portion increases in the liquid storage container.
Therefore, in the liquid storage container of this configuration, a notch or a notch is provided in the fold provided in the margin pasting portion. With such a configuration, among the folds provided in the margin pasting portion when folded, the folds that become mountain folds are separated from each other with the fold as a boundary. That is, the fold line that is substantially folded is a fold line provided in the margin part, so that the margin part and the margin paste are overlapped, but only the margin part is folded. On the other hand, the fold line that forms the valley fold is configured such that the side surface adjacent to the part provided with the notch or the notch is in contact via the part. Accordingly, since the material of the liquid storage container does not approach the crease located at the pasting portion, the valley can be easily folded. Thereby, the material of the liquid container is prevented from approaching near the crease of the margin pasting portion, and it becomes easy to fold. And the designability of the constriction part of a liquid storage container can also be maintained.

In the liquid container according to the present invention,
It is preferable that the fold is composed of an outer fold formed on the outer side of the side surface and an inner fold formed on the inner side of the side surface, and the outer fold is provided with a notch or a notch.

Usually, the liquid storage container has a configuration in which at least two materials are bonded to improve the strength of the container itself or to prevent the stored liquid from seeping out. The liquid container according to the present invention includes an outer side of the side surface (that is, an outer surface that is directly touched by a user's hand), and an inner side of the side surface (that is, the side that is inside the liquid container and directly contacts the liquid ). Therefore, the fold provided in the liquid container according to the present invention is configured such that the fold provided on the outside of the side surface and the fold provided on the inside of the side surface are integrated. Here, the folds provided on the outer side and the inner side of the side surface are referred to as “outer fold line” and “inner fold line”, respectively. Since the outer fold and the inner fold are integral folds, when the side surface of the liquid storage container is appropriately folded according to a predetermined folding method, the outer side of the side and the inner side of the side are folded at the same time.
Here, in order to store the liquid in the liquid storage container, it is necessary to use a material having water resistance and durability. However, since such a material is generally thick and has high rigidity, there is a problem that a force is required when folding the side surface, and it is difficult to fold. When the crease is a valley fold, the material of the liquid storage container is moved near the fold that becomes the valley fold, and the thickness of the portion increases on the side surface of the liquid storage container.
Therefore, the liquid storage container of this configuration is configured such that a notch or a cut is provided in the outer fold. With such a configuration, the outer folds that are mountain-folded when folded are separated from each other with the outer fold as a boundary. That is, since the fold that is substantially folded becomes an inner fold, only the inner side of the side surface is folded. On the other hand, the outer fold line that forms a valley fold is configured such that a side surface adjacent to a part provided with a notch or a notch is in contact via the part. Thereby, since the material of the liquid storage container does not approach the crease provided on the outer side surface, the valley can be easily folded. This prevents the material of the liquid storage container from approaching the vicinity of the outer fold and facilitates folding. For this reason, even a liquid storage container made of a material having water resistance and durability can be easily folded because the thickness of the material is reduced by the amount outside the side surface, and the strength of the liquid storage container is ensured. be able to.

In the liquid container according to the present invention,
It is preferable that an extensible sheet for covering the crease is provided on the side surface.

  In the case of the liquid storage container of this configuration, since the fold is protected by the extensible sheet as described above, when the side surface of the liquid storage container is folded according to the fold, the liquid storage container is formed by the apex of the corner formed by the fold. It is possible to surely prevent the outer casing from being broken. In addition, since the crease portion is a constricted portion, the user has a high frequency. Therefore, the strength of the liquid container can be improved by providing the extensible sheet as described above on the fold.

FIG. 1 is an explanatory diagram of a liquid storage container according to the first embodiment, in which (a) a developed view of the liquid storage container, (b) a perspective view of the liquid storage container, and (c) a liquid folded according to a fold. It is a perspective view of a storage container. FIG. 2 is an explanatory view of a liquid storage container according to the second embodiment, in which (a) a development view of the liquid storage container, (b) a perspective view of the liquid storage container, and (c) a liquid folded according to a fold. It is a perspective view of a storage container. FIG. 3 is an explanatory view of a liquid storage container according to the third embodiment, in which (a) a developed view of the liquid storage container, (b) a perspective view of the liquid storage container, and (c) a liquid folded according to a fold. It is a perspective view of a storage container. FIG. 4 is an explanatory view of a liquid storage container according to the fourth embodiment, in which (a) a developed view of the liquid storage container, (b) a perspective view of the liquid storage container, and (c) a liquid folded according to a fold. It is a perspective view of a storage container. FIG. 5 is an explanatory diagram of a liquid storage container according to a modification of the first embodiment, (a) an explanatory diagram when the fold is a single line, and (b) a fold with two lines. It is explanatory drawing in a case. FIG. 6 is an explanatory diagram of a liquid storage container according to a modification of the first embodiment, and is a partially enlarged view in the case where the fold is composed of two lines. FIG. 7 is an explanatory diagram regarding a margin part of a liquid storage container according to a modification of the first embodiment, in which (a) a developed view of the liquid storage container and (b) a margin part and a margin pasting part are overlapped. In the case, it is an explanatory diagram regarding the side surface before folding the fold, and (c) is an explanatory diagram regarding the side surface when the fold line is folded in the case where the marginal part and the margin pasting part are overlapped, (d) ) It is explanatory drawing regarding the side surface at the time of making the fold of a side surface into a valley fold, when the margin part and the margin sticking part are overlapped. FIG. 8 is an explanatory view of a liquid storage container according to a modification of the first embodiment, (a) is an enlarged view of a perspective view of a part of the side surface, and (b) relates to the side surface before folding. It is explanatory drawing, (c) It is explanatory drawing regarding the side surface at the time of making a fold into a mountain fold, (d) It is explanatory drawing regarding the side surface at the time of making a fold into a valley fold. FIG. 9 is a development view of a liquid container according to another embodiment.

  Hereinafter, embodiments of the liquid storage container of the present invention will be described with reference to FIGS. In the following embodiments, liquid storage containers represented by commercially available liquor packs and milk packs are assumed. As such liquid storage containers, for example, the width of the bottom surface is 70 to 100 mm, and the capacity is 500 to 3000 mL. Gable-top type Tetra Pak (registered trademark) is available, but it is naturally possible to apply it to liquid containers other than this size. Therefore, the present invention is not intended to be limited to the configurations described in the embodiments and drawings described below.

[First embodiment]
FIG. 1 is an explanatory diagram of a liquid storage container 100 according to the first embodiment. FIG. 1A is a development view of the liquid storage container 100. FIG. 1B is a perspective view of the liquid storage container 100. FIG. 1C is a perspective view of the liquid storage container 100 in a state of being folded according to the fold.

  The liquid storage container 100 includes four rectangular side surfaces 1 to 4. Upper portions 5 to 8 are continuous above each of the side surfaces 1 to 4, and lower portions 9 to 12 are continuous below. The spout 13 is provided substantially at the center of the upper portion 5 that is continuous with the side surface 1. The upper portions 5 to 8 have margin portions 14 to 17, the lower portions 9 to 12 have margin portions 18 to 21, the side surface 2 has a margin portion 22, and the inner side (back side) of the side surface 3 has a margin pasting portion 23 ( A portion indicated by a hatched portion) is provided, and side surfaces 1 to 4, upper portions 5 to 8, and lower portions 9 to 12 are connected to each other. The upper portions 6 and 8 are provided with a fold G for forming a roof, and the lower portions 10 and 12 are provided with a fold H for forming the bottom surface of the liquid storage container 100. In the development view of FIG. 1 (a), the folds (that is, the fold line G and the fold line H) to be valley-folded are indicated by broken lines. When a sheet made of waterproof cardboard or the like shown in the developed view of FIG. 1A is appropriately overlapped with the margins 14 to 17 and the fold line G is folded into a valley, a gable top roof is formed by the upper parts 5 to 8. It is formed. Further, when the margin portions 18 to 21 are appropriately overlapped and the fold line H is folded to the inside of the liquid storage container 100, the bottom surface of the liquid storage container 100 is formed. The upper portions 5 to 8, the side surfaces 1 to 4, and the lower portions 9 to 12 of the liquid storage container 100 are appropriately folded, and the marginal portion 22 connected to the side surface 2 and the margin pasting portion 23 inside the side surface 3 are appropriately overlapped. Further, when assembled according to the procedure described later, the liquid storage container 100 as shown in FIG. 1B can be assembled.

<Folds on the side>
As shown in FIG. 1A, three fold lines L1, L2, and L3 are provided on the four side surfaces 1 to 4 so as to cross the side surfaces 1 to 4. The three fold lines L1, L2, and L3 are formed in parallel to each other and at equal intervals. In addition, the side surface 1 having the spout 13 connected to the upper side 5 is provided with right-angled isosceles triangular folds V1 and V2, and the side surface 3 in the assembled state facing the side surface 1 has two Equilateral triangular folds V3 and V4 are provided. The hypotenuse in the fold lines V1 to V4 of the right-angled isosceles triangle is a straight line perpendicular to the parallel line formed of the fold lines L1 and L3. Here, the hypotenuse of the crease V1 of the right-angled isosceles triangle is located at the edge that forms the connection point between the side surface 4 and the side surface 1, and the hypotenuse of the crease V2 of the right-angled isosceles triangle is the connection point between the side surface 1 and the side surface 2. The hypotenuse of the right-angled isosceles triangle fold V3 is located at the edge that forms the connection point between the side surface 2 and the side surface 3, and the hypotenuse of the right-angled isosceles fold V4 is the side surface 3 and the side surface 4. It is located at the edge that forms the connection point. The fold lines S1, S2, S5, S6, S9, S10, S13, and S14 correspond to the hypotenuses in the fold lines V1 to V4 of a right isosceles triangle. The folds S1 and S2 correspond to the hypotenuse of the right-angled isosceles triangle fold V1, the folds S5 and S6 correspond to the hypotenuse of the right-angled isosceles triangle fold V2, and the folds S9 and S10 are the hypotenuses of the fold V3 of the right-angled isosceles triangle. The creases S13 and S14 correspond to the hypotenuse of the crease V4 having a right isosceles triangle. Among these folds, fold lines S1, S5, S9, and S13 are provided between fold line L1 and fold line L2, and fold lines S2, S6, S10, and S14 are provided between fold line L2 and fold line L3. It is. The fold lines T1, T2, T3, and T4 are straight fold lines located on the fold line L2. The crease T1 corresponds to a height when the hypotenuse formed by the creases S1 and S2 is the base of the right-angled isosceles crease V1. The length of the crease T1 is equal to the interval between the creases L1 and L2 and the interval between the creases L2 and L3, and this is the height a. The folds T2, T3, and T4 correspond to the height of the right-angled isosceles triangle when the hypotenuse is the bottom of the right-angled isosceles folds V2, V3, and V4. Equal to the length of T1. The folds S3, S4, S7, S8, S11, S12, S15, and S16 correspond to sides other than the hypotenuse of the folds V1 to V4 of the right isosceles triangle. The folds S3 and S4 constitute a part of a fold V1 having a right isosceles triangle, the folds S7 and S8 constitute a part of a fold V2 having a right isosceles triangle, and the folds S11 and S12 have a fold V3 having a right isosceles triangle. The folds S15 and S16 constitute a part of a crease V4 having a right isosceles triangle. Among these folds, the folds S3, S7, S11, and S15 are provided between the creases L1 and L2, and the folds S4, S8, S12, and S16 are provided between the folds L2 and L3. It is.

<Formation of constricted portion in liquid storage container>
In the developed view of the liquid storage container 100 shown in FIG. 1A, the folds indicated by solid lines (that is, folds L1, L3, S1, S2, S5, S6, S9, S10, S13, S14, T1, T2, T3 and T4) are creases for mountain folds. The folds indicated by broken lines (that is, the creases L2 (excluding straight portions overlapping with T1, T2, T3, and T4), S3, S4, S7, S8, S11, S12, S15, and S16) are valley folds. It is a crease. In assembling the liquid storage container 100 from the planar shape shown in the developed view of FIG. 1A to a three-dimensional shape, if the above fold is made into a mountain fold or a valley fold, as shown in FIG. The liquid storage container 100 having a unique shape is formed by forming the constricted portion 50 by recessing the portions where the fold lines 1 to 4 are provided. The fold line will be described in detail. As shown in FIG. 1B, the fold line L2 (excluding the straight lines overlapping the fold lines T1 and T2) on the side surface 1 is directed inward of the liquid storage container 100. When folded, the folds S1 and S2 constituting the oblique sides of the right-angled isosceles triangle fold V1 and the folds S5 and S6 constituting the oblique sides of the right-angled isosceles triangle fold V2 are centered with respect to the width direction of the side surface 1. It is folded to face. Accordingly, the folds S3, S4, S7, S8, T1, and T2 are folded toward the inside of the liquid storage container 100. Furthermore, the fold lines L1 and L3 are folded so as to overlap each other. As a result, the two right-angled isosceles triangle folds V1 and V2 at both edges of the side surface 1 are perfectly folded between three parallel folds while being folded in a form in which each hypotenuse is bisected. It will fit. Also on the side surface 3, as in the case of the side surface 1, the two right-angled isosceles folds V3 and V4 at both edges of the side surface 3 are folded in a form in which each oblique side is divided into two equal parts while being parallel to each other. Fits perfectly between folds. On the side surfaces 2 and 4, as shown in FIG. 1 (a), there is no right-angled isosceles triangle fold, so only the crease L2 is valley-folded as shown in FIG. The constricted portion 50 is formed so as to be directed inward (the side surface 4 is not shown). The constricted portion 50 formed on the side surfaces 2 and 4 can be used as the constricted portion 51 for the handle of the liquid storage container 100 because the fold of the right isosceles triangle does not get in the way. In addition, from the wrist movement when pouring liquid, there are many ways to hold the side surface 3 with the palm and to have the side surfaces 2 and 4 adjacent to the side surface 1 on the side where the spout 13 is provided. It is thought that it is easy to have for the user. Therefore, when the constricted portion 50 formed on the side surfaces 2 and 4 is the handle constricted portion 51, the user can hold the liquid storage container 100 in a stable state and pour the liquid inside.

  Here, as shown in FIG. 1A, when the width of the side surfaces 1 and 3 is a width b, the relationship between the height a and the width b of the crease of the right isosceles triangle is 1b / 15 ≦ a ≦ 1b. / 2, more preferably 1b / 5 ≦ a ≦ 1b / 2. By setting the size of the crease of the right-angled isosceles triangle within the above range, the degree of depression of the constricted portion 50 formed on the side surfaces 1 to 4 can be optimally adjusted. As a result, the degree of depression of the constricted portion 50 can be adjusted according to the size of the user's hand and the length of the finger, making it easier to hold. When the height of the side surfaces 1 to 4 is the height x and the length from the upper end of the side surfaces 1 to 4 to the crease L2 is the length y, the relationship between the height x and the length y is 1x / It is set in the range of 8 ≦ y ≦ 7x / 8, more preferably in the range of 1x / 4 ≦ y ≦ 3x / 4. By setting the position of three parallel fold lines (particularly the fold line L2) within the above range, the position of the constricted portion 50 formed on the side surfaces 1 to 4 can be optimally adjusted. As a result, the constricted portion 50 can be formed at a position that the user can easily hold, and the liquid can be poured more easily.

  Further, as shown in FIG. 1C, when the folds L1 and L3 of the liquid storage container 100 are folded so as to completely overlap each other, the constricted portion 50 is formed as shown in FIG. The upper and lower portions of the side surfaces 1 to 4 are configured to be on the same plane via the constricted portion 50. Therefore, in the height direction of the liquid storage container 100, the height is reduced by the length of the folds S1 and S2 corresponding to the hypotenuse of the crease V1 of the right isosceles triangle provided on the side surface 1. Accordingly, it is easy to secure a storage space in the height direction of the liquid storage container 100, and it can be used as a mark that the liquid in the liquid storage container 100 is reduced.

  By the way, among users, there is a user that it is easier to pour the side having the side surfaces 1 and 3 on which the spout 13 is provided. In that case, the crease of the first embodiment may be rotated by 90 °. That is, the creases are arranged such that the isosceles right creases V1 to V4 are provided on the side surface 2 where the spout 13 is not provided and the side surface 4 facing the side surface 2. At this time, the constricted portion 51 for the handle is formed on the side surface 1 and the side surface 3. As a result, it is possible to provide the liquid storage container 100 that can be comfortably held by the user as described above and is easy to pour.

[Second Embodiment]
FIG. 2 is an explanatory diagram of the liquid storage container 200 according to the second embodiment. FIG. 2A is a development view of the liquid storage container 200. FIG. 2B is a perspective view of the liquid storage container 200. FIG. 2C is a perspective view of the liquid storage container 200 in a state of being folded according to the crease.

  Similarly to the first embodiment, the liquid storage container 200 includes four rectangular side surfaces 1 to 4, upper portions 5 to 8, and lower portions 9 to 12, and the spout 13 is provided at the approximate center of the upper portion 5. It is done. The upper portions 5 to 8 have margin portions 14 to 17, the lower portions 9 to 12 have margin portions 18 to 21, the side surface 2 has a margin portion 22, and the inner side (back side) of the side surface 3 has a margin pasting portion 23 ( A portion indicated by a hatched portion) is provided, and side surfaces 1 to 4, upper portions 5 to 8, and lower portions 9 to 12 are connected to each other. The upper portions 6 and 8 are provided with folds G for forming the roof, and the lower portions 10 and 12 are provided with folds H for forming the bottom surface of the liquid storage container 200. In the development view of FIG. 2 (a), the folds (that is, the fold line G and the fold line H) to be folded are indicated by broken lines. When a sheet made of waterproof cardboard or the like shown in the developed view of FIG. 2A is appropriately overlapped with the margins 14 to 17 and the fold line G is folded into a valley, a gable top roof is formed by the upper parts 5 to 8. It is formed. Further, when the margin portions 18 to 21 are appropriately overlapped and the fold line H is folded to the inside of the liquid storage container 200, the bottom surface of the liquid storage container 200 is formed. The upper portions 5 to 8, the side surfaces 1 to 4, and the lower portions 9 to 12 of the liquid storage container 200 are appropriately folded, and the marginal portion 22 connected to the side surface 2 and the margin pasting portion 23 inside the side surface 3 are appropriately overlapped. Further, when assembled according to the procedure described later, the liquid container 200 as shown in FIG. 2B can be assembled.

<Folds on the side>
As shown in FIG. 2A, in the liquid storage container 200 according to the second embodiment, a fold similar to the first embodiment is added below the fold provided in the first embodiment in the same direction. A liquid storage container provided. Here, it is assumed that the crease group W <b> 1 disposed above in the height direction of the liquid storage container 200 is a crease group W <b> 1 and the fold line disposed below is a crease group W <b> 2. The crease group W1 is a crease composed of creases L1 to L3, creases S1 to S16 that form creases V1 to V4 of right-angled isosceles triangles, and creases T1 to T4. Since it explained in, it abbreviate | omits.
The fold group W2 is arranged at a position spaced a predetermined distance from the fold L3 of the fold group W1, and is substantially the same as the fold of the fold group W1. Accordingly, in each fold of the fold group W2, the folds L4 to L6 correspond to the folds L1 to L3, the folds V5 to V8 of the right isosceles triangle correspond to the folds V1 to V4 of the right isosceles triangle, and the folds S17 to S32. Corresponds to fold lines S1 to S16, and fold lines T5 to T8 correspond to fold lines T1 to T4.

<Formation of constricted portion in liquid storage container>
In the developed view of the liquid storage container 200 shown in FIG. 2A, the fold group W1 indicated by the solid line and the broken line has been described in the first embodiment, and will be omitted. The crease group W2 constitutes a crease similar to the crease group W1, and is shown by a solid line in the crease group W2 (that is, the creases L4, L6, S17, S18, S21, S22, S25, S26, S29, S30, T5, T6, T7, and T8) are creases for mountain folds. The fold lines indicated by broken lines (that is, fold lines L5 (excluding straight line portions overlapping with T5, T6, T7, and T8), S19, S20, S23, S24, S27, S28, S31, and S32) are valley folds. It is a crease. In assembling the liquid storage container 200 from the planar shape shown in the development view of FIG. 2A to a three-dimensional shape, if the fold is folded into a mountain or a valley, the side surface as shown in FIG. A portion provided with folds 1 to 4 is recessed to form a constricted portion 50 by the fold group W1 and a constricted portion 60 by the crease group W2, and has a unique shape having two constricted portions 50 and 60. Is completed. Since the formation of the constricted portion 50 by the fold group W1 has been described in the first embodiment, a description thereof will be omitted. The constricted portion 60 by the fold group W2 is formed by making each fold of the fold group W2 corresponding to the fold of the fold group W1 into a mountain fold or a valley fold similarly to the fold group W1. As shown in FIG. 2 (b), the constricted portions 50 and 60 formed on the side surface 2 and the side surface 4 (the side surface 4 is not shown) fold the right-angled isosceles triangle crease as shown in FIG. Therefore, it can be used as the handle constricted portions 51 and 61 of the liquid storage container 200. Thus, by providing a plurality of constricted portions, the user can select the position of the constricted portion that is easy to hold. In addition, the formation of the plurality of constricted portions increases the contact area between the liquid filled in the liquid storage container 200 and the liquid storage container 200. Therefore, it can also contribute to the improvement of the heat retaining effect and cooling effect of the liquid inside.

  Further, as shown in FIG. 2C, when the folds L1 and L3 and the folds L4 and L6 of the liquid storage container 200 are folded so as to completely overlap each other, the constricted portion 50 and Through the state of forming 60, the upper and lower portions and the middle portion of the side surfaces 1 to 4 are configured to be on the same plane via the constricted portions 50 and 60. Therefore, in the height direction of the liquid storage container 200, the folds S1 and S2 corresponding to the hypotenuse of the right-angled isosceles triangle fold V1 provided on the side surface 1, and the fold corresponding to the hypotenuse of the right-angled isosceles fold V5. The height is reduced by the length of S17 and S18. Accordingly, it is easy to secure a storage space in the height direction of the liquid storage container 200, and it can be used as a mark that the liquid in the liquid storage container 200 is reduced. Further, as the liquid in the liquid storage container 200 decreases, a constricted portion can be formed stepwise from the upper fold group and folded.

  In the second embodiment, the constricted portion is provided in two places in the height direction of the liquid storage container 200, but three or more constricted portions may be provided. If comprised in this way, when there are two or more users, the constriction part of the position which it is easy to have according to each person can be selected, and a dent condition can be adjusted for every constriction part. Further, when the folds of the plurality of constricted portions are completely folded, the height of the liquid storage container 200 can be further reduced, so that it is easy to secure a storage space in the height direction of the liquid storage container 200. Furthermore, since the contact area between the liquid filled in the liquid storage container 200 and the liquid storage container 200 is further increased, further improvement of the heat retention and cooling effect of the liquid inside can be expected.

[Third embodiment]
FIG. 3 is an explanatory diagram of the liquid storage container 300 according to the third embodiment. FIG. 3A is a development view of the liquid storage container 300. FIG. 3B is a perspective view of the liquid storage container 300. FIG. 3C is a perspective view of the liquid storage container 300 in a state of being folded according to the fold.

  Similarly to the first embodiment, the liquid storage container 300 includes four rectangular side surfaces 1 to 4, upper portions 5 to 8, and lower portions 9 to 12, and the spout 13 is provided at the approximate center of the upper portion 5. It is done. The upper portions 5 to 8 have margin portions 14 to 17, the lower portions 9 to 12 have margin portions 18 to 21, the side surface 2 has a margin portion 22, and the inner side (back side) of the side surface 3 has a margin pasting portion 23 ( A portion indicated by a hatched portion) is provided, and side surfaces 1 to 4, upper portions 5 to 8, and lower portions 9 to 12 are connected to each other. The upper portions 6 and 8 are provided with folds G for forming the roof, and the lower portions 10 and 12 are provided with folds H for forming the bottom surface of the liquid storage container 300. In the development view of FIG. 3A, the folds (that is, the fold line G and the fold line H) to be valley-folded are indicated by broken lines. When a sheet made of waterproof cardboard or the like shown in the developed view of FIG. 3A is appropriately overlapped with the margins 14 to 17 and the fold line G is folded into a valley, a gable top roof is formed by the upper parts 5 to 8. It is formed. Further, when the margin portions 18 to 21 are appropriately overlapped and the fold line H is folded to the inside of the liquid storage container 300, the bottom surface of the liquid storage container 300 is formed. The upper portions 5 to 8, the side surfaces 1 to 4, and the lower portions 9 to 12 of the liquid storage container 300 are appropriately folded, and the margin portion 22 connected to the side surface 2 and the margin pasting portion 23 inside the side surface 3 are appropriately overlapped. Further, when assembled according to the procedure described later, the liquid container 300 as shown in FIG. 3B can be assembled.

<Folds on the side>
As shown in FIG. 3A, the liquid storage container 300 according to the third embodiment is added with a crease similar to that of the first embodiment below the fold provided in the first embodiment by changing the orientation. And a liquid storage container provided. Here, it is assumed that the fold line W1 arranged in the upper direction in the height direction of the liquid storage container 300 is a crease group W1, and the fold line W3 arranged below is a crease group W3. The crease group W1 is a crease composed of creases L1 to L3, creases S1 to S16 forming creases V1 to V4 of right-angled isosceles triangles, and creases T1 to T4. Since it explained, it abbreviate | omits.
The crease group W3 is arranged at a position spaced from the crease L3 of the crease group W1 by a predetermined distance, and is provided by rotating substantially the same fold as the crease of the crease group W1 by 90 °. That is, as shown in FIG. 3A, the side surface 2 and the side surface 4 are arranged so that folds of right-angled isosceles triangles belonging to the fold group W3 are formed. Therefore, in each fold of the fold group W3, the folds L7 to L9 correspond to the folds L1 to L3, the folds V9 to V12 of the right isosceles triangle correspond to the folds V1 to V4 of the right isosceles triangle, and the folds S33 to S48. Corresponds to fold lines S1 to S16, and fold lines T9 to T12 correspond to fold lines T1 to T4.

<Formation of constricted portion in liquid storage container>
In the developed view of the liquid storage container 300 shown in FIG. 3A, the fold group W1 indicated by the solid line and the broken line has been described in the first embodiment, and will be omitted. The crease group W3 constitutes a fold similar to the crease group W1, and is shown by a solid line in the crease group W3 (that is, the creases L7, L9, S33, S34, S37, S38, S41, S42, S45, S46, T9, T10, T11, and T12) are creases for mountain folds. The folds indicated by broken lines (that is, the creases L8 (excluding straight portions overlapping with T9, T10, T11, and T12), S35, S36, S39, S40, S43, S44, S47, and S48) are valley folds. It is a crease. In assembling the liquid storage container 300 from the planar shape shown in the developed view of FIG. 3A to a three-dimensional shape, if the fold is folded into a mountain or a valley, a side surface is formed as shown in FIG. The portion provided with the folds 1 to 4 is recessed, the constricted portion 50 by the fold group W1 and the constricted portion 70 by the fold group W3 are formed, and the liquid storage container 300 having a unique shape having the two constricted portions 50 and 70 is formed. Is completed. Since the formation of the constricted portion 50 by the fold group W1 has been described in the first embodiment, a description thereof will be omitted. The formation of the constricted portion 70 by the crease group W3 is the same as the formation of the constricted portion 50 by the crease group W1, but the folds V9 to V12 having right-angled isosceles triangles are provided on the side surface 2 and the side surface 4, respectively. The two right-angled isosceles triangle folds V9 and V10 at both edges of the side surface 2 are folded between three folds L7 to L9 while being folded in a form in which each hypotenuse is bisected. Fits perfectly. Also on the side surface 4, as in the side surface 2, the two folds V11 and V12 of the right isosceles triangle on both edges of the side surface 4 are folded in a form in which each oblique side is divided into two equal parts while being parallel to each other. It fits perfectly between the creases L7 to L9, which are creases. On the side surfaces 1 and 3, there is no right-angled isosceles triangle fold belonging to the fold group W3 as shown in FIG. 3A, so the fold L8 is valley-folded as shown in FIG. The constricted portion 70 is formed by being folded toward the inside of the storage container 300 (the side surface 3 is not shown). The constricted portion 70 formed on the side surfaces 1 and 3 can be used as the constricted portion 71 for the handle of the liquid storage container 300 because the fold of the right isosceles triangle does not get in the way.

  Further, as shown in FIG. 3C, when the folds L1 and L3 and the folds L7 and L9 of the liquid storage container 300 are folded so as to completely overlap each other, the constricted portion 50 as shown in FIG. And the upper and lower portions and the middle portion of the side surfaces 1 to 4 are configured to be on the same plane via the constricted portions 50 and 70. Therefore, in the height direction of the liquid container 300, the folds S1 and S2 corresponding to the hypotenuse of the right isosceles triangle fold V1 provided on the side surface 1 and the right isosceles triangle fold V9 provided on the side surface 2 are provided. The height is reduced by the length of the folds S33 and S34 corresponding to the hypotenuse. Accordingly, it is easy to secure a storage space in the height direction of the liquid storage container 300, and it can be used as a mark that the liquid in the liquid storage container 300 is reduced. Further, as the liquid in the liquid storage container 300 decreases, a constricted portion can be formed stepwise from the upper fold group and folded.

  In the third embodiment, two constrictions are provided in the height direction of the liquid container 300, but three or more constrictions may be provided. If comprised in this way, when there are two or more users, the constriction part of the position which it is easy to have according to each person can be selected, and a dent condition can be adjusted for every constriction part. In particular, in the third embodiment, in addition to the side surface 1 on which the spout 13 is provided and the side surface 3 that faces the side surface 1, the side surface 2 on which the spout 13 is not provided and the side surface 4 that faces the side surface 2. In addition, since a right-angled isosceles triangular crease is provided, the constricted portion for the handle is formed on all side surfaces. For this reason, it is possible to meet the user's needs that it is easier to pour by having the side surface 1 on the side where the spout is provided and the side surface 3 opposite to the side surface 1, and liquid storage that is easy to use for more people. It becomes a container. Further, when the folds of the plurality of constricted portions are completely folded, the height of the liquid storage container 300 can be further reduced, so that it is easy to secure a storage space in the height direction of the liquid storage container 300. Furthermore, since the contact area between the liquid filled in the liquid storage container 300 and the liquid storage container 300 is further increased, further improvement in the heat retention and cooling effect of the liquid inside can be expected.

[Fourth embodiment]
FIG. 4 is an explanatory diagram of a liquid storage container 400 according to the fourth embodiment. FIG. 4A is a development view of the liquid storage container 400. FIG. 4B is a perspective view of the liquid storage container 400. FIG. 4C is a perspective view of the liquid storage container 400 in a state of being folded according to the fold.

  Similarly to the first embodiment, the liquid storage container 400 is composed of four rectangular side surfaces 1 to 4, upper portions 5 to 8, and lower portions 9 to 12, and the spout 13 is provided at the approximate center of the upper portion 5. It is done. The upper portions 5 to 8 have margin portions 14 to 17, the lower portions 9 to 12 have margin portions 18 to 21, the side surface 2 has a margin portion 22, and the inner side (back side) of the side surface 3 has a margin pasting portion 23 ( A portion indicated by a hatched portion) is provided, and side surfaces 1 to 4, upper portions 5 to 8, and lower portions 9 to 12 are connected to each other. The upper portions 6 and 8 are provided with a fold G for forming a roof, and the lower portions 10 and 12 are provided with a fold H for forming the bottom surface of the liquid storage container 400. In the development view of FIG. 4A, the folds (that is, the fold line G and the fold line H) to be valley-folded are indicated by broken lines. When a sheet made of waterproof cardboard or the like shown in the developed view of FIG. 4A is appropriately overlapped with the marginal portions 14 to 17 and the fold line G is folded into a valley, a gable top roof is formed by the upper portions 5 to 8. It is formed. Further, when the margin portions 18 to 21 are appropriately overlapped and the fold line H is folded to the inside of the liquid storage container 400, the bottom surface of the liquid storage container 400 is formed. The upper portions 5 to 8, the side surfaces 1 to 4, and the lower portions 9 to 12 of the liquid storage container 400 are appropriately folded, and the margin portion 22 connected to the side surface 2 and the margin pasting portion 23 inside the side surface 3 are appropriately overlapped. Further, when assembled according to the procedure described later, a liquid container 400 as shown in FIG. 4B can be assembled.

<Folds on the side>
As shown in FIG. 4A, the liquid storage container 400 according to the fourth embodiment has the same fold as that of the first embodiment so as to be adjacent to the lower side of the fold provided in the first embodiment. This is a liquid storage container that is additionally provided in the direction. Here, the crease group W1 disposed above in the height direction of the liquid storage container 400 is referred to as a crease group W1, and the crease group W4 disposed adjacent to the lower part is referred to as a crease group W4. The crease group W1 is a crease composed of creases L1 to L3, creases S1 to S16 forming creases V1 to V4 of right-angled isosceles triangles, and creases T1 to T4. Since it explained, it abbreviate | omits.
The fold group W4 includes folds L10 to L12, folds S49 to S64 forming folds V13 to V16 having a right isosceles triangle, and folds T13 to T16. The fold group W4 is formed by sliding a fold line that is substantially the same as the fold line of the fold group W1 so as to be adjacent downward in the height direction of the liquid container 400. Accordingly, in each fold of the fold group W4, the folds L10 to L12 correspond to the folds L1 to L3, the folds V13 to V16 of the right isosceles triangle correspond to the folds V1 to V4 of the right isosceles triangle, and the folds S49 to S64. Corresponds to fold lines S1 to S16, and fold lines T13 to T16 correspond to fold lines T1 to T4. And the fold L10 of the fold group W4 and the fold L3 of the fold group W1 overlap.

<Formation of constricted portion in liquid storage container>
In the developed view of the liquid storage container 400 shown in FIG. 4A, the fold group W1 indicated by the solid line and the broken line has been described in the first embodiment, and will be omitted. Since the fold group W4 constitutes the same fold as the fold group W1, the fold lines indicated by solid lines in the fold group W4 (that is, the fold lines L10, L12, S49, S50, S53, S54, S57, S58, S61, S62). , T13, T14, T15, and T16) are creases for mountain folds. The fold lines indicated by broken lines (that is, the fold lines L11 (excluding straight line portions overlapping with T13, T14, T15, and T16), S51, S52, S55, S56, S59, S60, S63, and S64) are valley folds. It is a crease. In assembling the liquid storage container 400 from the planar shape shown in the development view of FIG. 4A to a three-dimensional shape, if the fold is folded into a mountain or a valley, the side surface is as shown in FIG. The liquid container 400 having a unique shape having the two constricted portions 50 and 80 is formed by forming the constricted portion 50 by the fold group W1 and the constricted portion 80 by the fold group W4. Is completed. Since the formation of the constricted portion 50 by the fold group W1 has been described in the first embodiment, a description thereof will be omitted. The constricted portion 80 by the fold group W4 is formed by making each fold of the fold group W4 corresponding to the fold of the fold group W1 into a mountain fold or a valley fold similarly to the fold group W1. By folding in this way, as shown in FIG. 4B, the constricted portions 50 and 80 formed on the side surface 2 and the side surface 4 (the side surface 4 is not shown) are obstructed by a right-angled isosceles triangle fold. Therefore, it can be used as the handle constricted portions 51 and 81 of the liquid storage container 400. As shown in FIG. 4B, the constricted portions 50 and 80 of the liquid storage container 400 are formed so as to be adjacent to each other. Therefore, even when the liquid storage container 400 is held with one hand, Can be adjusted to the constriction. Thereby, it becomes easy to have a constriction part and can pour a liquid more stably.

  Further, as shown in FIG. 4C, when the folds L1 and L3 and the folds L10 and L12 of the liquid storage container 400 are folded so as to completely overlap each other, the constricted portion 50 as shown in FIG. 4B. And 80 are formed so that the upper and lower portions of the side surfaces 1 to 4 are flush with each other through the constricted portions 50 and 80. Therefore, in the height direction of the liquid storage container 400, the folds S1 and S2 corresponding to the hypotenuse of the right-angled isosceles triangle fold V1 provided on the side surface 1, and the fold corresponding to the hypotenuse of the right-angled isosceles fold V13. The height is reduced by the length of S49 and S50. Accordingly, it is easy to secure a storage space in the height direction of the liquid storage container 400, and it can be used as a mark that the liquid in the liquid storage container 400 is reduced. Further, as the liquid in the liquid storage container 400 decreases, a constricted portion can be formed stepwise from the upper fold group and folded.

  In addition, in 4th Embodiment, although what provided the constriction part two places so that it may continue in the height direction of the liquid storage container 400 is shown, you may provide three or more places so that it may continue. Alternatively, it may be a combination of two or more continuous constricted portions and one or more discontinuous constricted portions. In this case, the position of the constricted part that is easy to hold is selected according to the weight of the liquid in the contents, and all the fingers of the hand can be aligned with the constricted part, and it becomes easier to hold even with one hand. Further, even when there are a plurality of users, it is possible to select a constricted portion at a position that is easy to hold according to each person while adjusting the degree of depression for each constricted portion, and to match the fingers of the hand. Further, when the folds of the plurality of constricted portions are completely folded, the height of the liquid storage container 400 can be further reduced, so that it is easy to secure a storage space in the height direction of the liquid storage container 400. Further, since the contact area between the liquid filled in the liquid storage container 400 and the liquid storage container 400 is further increased, it is possible to expect the heat retention and cooling effect of the content liquid to be improved.

[Multiple folding lines]
All the folds provided in the liquid storage containers 100 to 400 according to the first embodiment to the fourth embodiment are composed of one line. However, the fold line provided in the liquid storage container according to the present invention is not limited to a single line, and the fold line may be configured as a plurality of two or more fold lines. Such a fold composed of a plurality of folds is referred to as “a plurality of fold lines”. The plurality of folding lines will be described based on the liquid storage container 100 according to the first embodiment.
FIG. 5 is an explanatory diagram relating to the fold line of the liquid storage container 100 according to the modification of the first embodiment. FIG. 5A is an explanatory diagram when the fold provided in the liquid storage container 100 is a single line. FIG. 5B is an explanatory diagram when the crease provided in the liquid storage container 100 is two lines. 5A and 5B show a case where the liquid storage container 100 is viewed from the top (upper view) and a side view (middle view) with respect to the fold. And the corner | angular of the vertex (lower figure) formed by a crease | fold when folding a crease | fold is shown. 5A and 5B, the dotted line in the upper diagram indicates the side surface of the liquid storage container 100, and the solid line indicates the crease. When the side surfaces 1 to 4 of the liquid storage container 100 are folded according to the fold shown in FIG. 1A, corners with the folds as apexes are formed as shown in FIG. Projects inward. When further folded, as shown in FIG. 1C, the side surfaces 1 to 4 of the liquid storage container 100 constitute the same plane through the constricted portion 50. Here, a crease when the liquid storage container 100 is in the state as shown in FIG. First, as shown in FIG. 5A, when the fold is formed by a single line, the fold is folded at a large angle of α ° when viewed from the outside of the liquid storage container 100 in FIG. 5A. Then, an angle of β °, which is an acute angle, is formed on the inner side of the liquid storage container 100 in the fold line surrounded by the dotted circle, and has a shape protruding from the fold line as a vertex. There is a possibility that the side surface is broken by this apex (that is, the crease itself). In addition, since the material constituting the liquid storage container 100 approaches toward the fold, the thickness of the material near the fold increases, and there is a possibility that it is difficult to fold.
Therefore, when the crease is formed of two lines, the inventor folds the fold while forming a surface when the crease is folded. Therefore, the acute angle β ° in FIG. We focused on the fact that the angle of the apex part was distributed around. That is, in FIG. 5A, a protruding corner is formed, but the angle of γ °, which is an angle larger than β ° inside the liquid storage container 100 in the portion surrounded by the dotted circle in FIG. 5B. Are formed (two locations are shown in FIG. 5B), and the sharp protruding corners as shown in FIG. 5A are not formed. Thereby, the side surface of the liquid storage container 100 can be hardly broken. Further, when the folds are configured in this manner, the angles are dispersed, so that the direction in which the material constituting the liquid storage container 100 approaches can also be dispersed, and the thickness does not increase only in the vicinity of the folds. It became possible to maintain the thickness in a substantially uniform state. As a result, the side surface can be folded without applying an excessive force, and a desired constricted portion can be formed.

  FIG. 6 is a partially enlarged view of a portion surrounded by a solid circle in the development view of the liquid storage container 100 according to the modification of the first embodiment. Since the plurality of fold lines are fold lines (fold lines) composed of lines close to each other, they are visually recognized as fold lines of approximately one line. As shown in the partially enlarged view of FIG. 6, each fold line of the liquid storage container 100 can be constituted by two lines, and three parallel lines crossing the four side surfaces 1 to 4 of the liquid storage container 100. The folds are folds L1, L1 ′, L2, L2 ′, L3, and L3 ′, and the folds L1 and L1 ′, the folds L2 and L2 ′, and the folds L3 and L3 ′ are configured as one set. . Similarly, the folds S1, S1 ′, S2, S2 ′, S3, S3 ′, S4, S4 ′, S5, S5 ′, S6, S6 ′, and S7 are also applied to the folds V1 and V2 of the right isosceles triangle. , S7 ′, S8, S8 ′, T1, T1 ′, T2, T2 ′, folds S1 and S1 ′, folds S2 and S2 ′, folds S3 and S3 ′, folds S4 and S4 ′, folds S5 and S5 ′, The fold lines S6 and S6 ′, the fold lines S7 and S7 ′, the fold lines S8 and S8 ′, the fold lines T1 and T1 ′, and the fold lines T2 and T2 ′ are configured as one set. The enlarged view of FIG. 6 shows a part of a development view of the liquid storage container 100 according to the modification of the first embodiment, but all the folds provided in the liquid storage container 100 are configured in the same manner as described above. It shall be. That is, for the folds S9 to S16, T3, and T4, a pair of folds is provided in each fold, and each set of folds is configured as a plurality of fold lines. With such a configuration, when the side surfaces 1 to 4 are folded, as shown in FIG. 5B, the plurality of folding lines are folded so as to form several surfaces while dispersing the angles. A corner where the vertex due to the fold protrudes is not formed. As a result, the side surfaces 1 to 4 of the liquid storage container 100 are not easily broken. Further, since the material constituting the liquid storage container 100 does not concentrate on the crease (plural fold lines), the thickness of the material near the fold lines is folded while maintaining a substantially uniform state. It is. Accordingly, the side surfaces 1 to 4 can be folded without applying an excessive force, and a desired constricted portion can be formed.

  In the above description, as shown in FIG. 6, a plurality of folding lines composed of two lines (folds) have been described, but a plurality of folding lines may be composed of three or more lines (folds). Absent. Moreover, although the case where the several folding line was provided in the liquid storage container 100 which concerns on the modification of 1st embodiment was demonstrated, in the liquid storage containers 200-400 which concern on the modification of 2nd embodiment-4th embodiment. The fold line provided can also be configured as a plurality of fold lines as in the first embodiment. Furthermore, in the above description, all the folds provided in the liquid storage container 100 are configured to have a plurality of fold lines, but only some fold lines may be configured as a plurality of fold lines. For example, in the liquid storage container 100 according to the modification of the first embodiment, the folds V1 to V4 of the right isosceles triangle shown in FIG. 1A are folded while forming a triangular surface, and FIG. As shown in FIG. 5, the side surfaces 1 to 4 are folded through the constricted portion 50 so as to fit inside the liquid storage container 100 so that they are flush with each other. Here, the folds forming the right-angled isosceles triangle folds V <b> 1 to V <b> 4 overlap each other, and the thickness of the material in the vicinity of the fold increases accordingly, which may make folding difficult. For this reason, you may comprise only the crease which comprises the creases V1-V4 of a right-angled isosceles triangle as a some fold line. Moreover, the structure which makes a some fold line only about a part of crease can be comprised similarly about the crease | fold in the liquid storage containers 200-400 which concern on the modification of 2nd embodiment-4th embodiment. Therefore, for example, depending on the size of the liquid storage container, the amount of liquid stored inside, or the material of the material constituting the liquid storage container, all the folds can be configured as a plurality of fold lines, or the fold lines can be selected. Only the fold line can be configured as a plurality of folding lines.

[Fold lines at the glue part and glue part]
In the liquid storage containers 100 to 400 according to the first embodiment to the fourth embodiment, the liquid storage container 100 will be considered as an example of the creases provided in the margin 22 and the margin pasting section 23. FIG. 7 is an explanatory view of a liquid storage container 100 according to a modification of the first embodiment. FIG. 7A is a development view of the liquid storage container 100 and is provided in the margin 22 and the margin pasting part 23. It is explanatory drawing regarding the fold which is made. Here, in FIGS. 1 to 4, the folds in the development views of the liquid storage containers 100 to 400 according to the first embodiment to the fourth embodiment have shown mountain folds as solid lines and valley folds as broken lines, In FIG. 7A, for convenience of explanation, the folds provided in the margin 22 and the margin pasting portion 23 are indicated by solid lines, and the other folds are indicated by broken lines. A fold line provided in the margin 22 is defined as a crease Q, and a fold line provided in the margin pasting section 23 is defined as a crease R. Since the margin portion 22 and the margin pasting portion 23 are overlapped, the overlapped portion is thicker than the other portions in the side surfaces 1 to 4 constituting the liquid storage container 100, and is provided in the margin portion 22. Of the folds formed, the crease Q overlaps with the crease R located at the margin pasting portion 23, and the crease Q and the crease R are configured integrally. Therefore, when the side surfaces 1 to 4 of the liquid storage container 100 are folded according to the crease, the overlapped portion is thicker than the other portions of the side surface, so that it is difficult to fold. In such a case, since the crease of the margin pasting portion 23 (margin portion 22) is difficult to fold as desired, there is a possibility that the appearance of the constricted portion 50 looks inferior. In particular, as shown in FIG. 7A, when the crease R provided in the margin pasting portion 23 (the crease Q in the margin portion 22) corresponds to the crease constituting the crease V3 of a right isosceles triangle, FIG. As shown in (c), since the upper and lower sides of the side surfaces 1 to 4 are finally folded via the constricted portion 50 so as to form the same plane, the portion is more difficult to fold because of its thickness. . When the crease is a valley fold, the material of the liquid storage container 100 is shifted to the vicinity of the crease R located in the margin pasting portion 23, and the thickness of the portion increases in the liquid storage container 100. It becomes difficult.

Therefore, the present inventor has solved the above problem by devising the crease R located in the margin pasting portion 23 of the liquid storage container 100. FIG. 7B is an enlarged view of a part of the side surface before folding the crease when the margin part 22 and the margin pasting part 23 are overlapped, and FIG. FIG. 7D is an enlarged view of a partial cross section of the side surface when the crease is a mountain fold in the case where the marginal portion and the marginal pasting portion are overlapped, and FIG. 7D is a marginal portion. FIG. 6 is an enlarged view of a partial cross section of a side surface when a crease is a valley fold in a case where a marginal application portion is overlapped. As shown in FIG. 7B, a cutout W is provided in the crease R. With such a configuration, as shown in FIG. 7C, when the liquid storage container 100 is mountain-folded, the fold R has a notch W, and therefore, the fold R is separated as a boundary. Thereby, the crease R itself is separated, and the margin part 22 and the margin pasting part 23 are folded according to the crease Q, so that only the margin part 22 is actually folded. For this reason, even if the margin part 22 and the margin pasting part 23 are overlapped, the thickness of the paper is reduced by the margin pasting part 23, so that it is easy to fold. On the other hand, as shown in FIG. 7D, when the liquid storage container 100 is valley-folded, the side surfaces adjacent to the portion where the notch W is provided in the fold line R are in contact with each other via the portion. Configured as follows. Thereby, since the material of the liquid storage container 100 does not approach the crease R located at the margin pasting portion 23, it becomes easy to fold the valley. This prevents the material of the liquid storage container 100 from approaching the vicinity of the crease R of the margin pasting portion 23 and facilitates folding. And the designability of the constriction part 50 of the liquid storage container 100 can also be maintained.
In the above embodiment, the notch W is provided in the crease R, but the portion may be a cut. Even in such a configuration, it can be handled in the same manner as in the above embodiment. Further, in the case of the incision, since it can be produced more easily than providing a notch crease, the working efficiency of the process of providing a crease in the liquid storage container 100 can be improved.

  The configuration as described above is not limited to the liquid storage container 100 according to the modification of the first embodiment, but the marginal part 22 according to the liquid storage containers 200 to 400 according to the modification of the second embodiment to the fourth embodiment, The margin pasting portion 23 can be configured in the same manner.

[Outer crease and inner crease]
Usually, in the liquid storage container, in order to improve the strength of the container itself or prevent the stored liquid from oozing out, at least two materials are bonded to the material constituting the liquid storage container. As a material constituting the liquid storage container according to the present invention, a material that can be creased and can be folded is suitable. Examples of such a material include paper and synthetic resins such as polyethylene terephthalate, polystyrene, and polypropylene. In this embodiment, the material of the liquid storage container is handled as being made of paper.
FIG. 8 is an explanatory diagram relating to the liquid storage container 100 according to a modification of the first embodiment. FIG. 8A is an enlarged view of a perspective view of a part of a side surface where a fold is provided in the development view of the liquid storage container 100. As shown in FIG. 8A, the liquid storage container 100 includes an outer side surface M (that is, an outer surface that is directly touched by a user's hand) that forms the outside of the side surface, and an inner side of the side surface. And the inner side surface N (that is, the side inside the liquid storage container and in direct contact with the liquid). Accordingly, providing the crease in the liquid storage container 100 means that the crease is provided on both the outer side surface M and the inner side surface N at the same time. Here, the folds provided on the outer side surface M and the inner side surface N are referred to as “outer fold line P” and “inner fold line U”, respectively. The outer fold line P and the inner fold line U are configured as one body, and when the side surfaces 1 to 4 are folded according to the predetermined folding method, the outer side surface M and the inner side surface N are folded at the same time.
Here, in order to store the liquid in the liquid storage container 100, it is necessary to use a material having water resistance and durability. However, since such a material is generally thick and has high rigidity, there is a problem that a force is required when the side surfaces 1 to 4 are folded or the folding is difficult. The problem as described above is that when the outer fold P is a valley fold, the material of the liquid storage container 100 is shifted to the vicinity of the outer fold P to be the valley fold, and the thickness of the portion increases in the liquid storage container 100. It becomes difficult to fold.

FIG. 8B is an enlarged view of a part of the side surface before the liquid storage container 100 is folded, and FIG. 8C is a side view when the liquid storage container 100 is mountain-folded. FIG. 8D is an enlarged view of a partial cross section of the side surface when the liquid storage container 100 is valley-folded. In order to solve the above problems, a notch K is provided in the outer fold line P as shown in FIG. With this configuration, as shown in FIG. 8C, when the liquid storage container 100 is mountain-folded, the outer fold P has a notch K, and therefore, the outer fold P is separated as a boundary. As a result, the outer fold line P itself is separated and the side surfaces 1 to 4 are folded according to the inner fold line U. Therefore, only the inner side surface N is actually folded. For this reason, even if it is the liquid storage container 100 comprised from the paper which has the above thickness, since the thickness of paper reduces by the part of the outer side surface M, it becomes easy to fold. On the other hand, as shown in FIG. 8D, when the liquid storage container 100 is valley-folded, the side surfaces adjacent to the portion where the notch K is provided in the outer fold line P pass through the portion. Configured to touch. Accordingly, the material of the liquid storage container 100 does not approach the vicinity of the fold line P provided on the outer side surface M, so that the valley can be easily folded. As a result, the material of the liquid storage container 100 is prevented from approaching the vicinity of the fold line P on the outer side surface M, and it becomes easy to fold. In addition, the strength of the liquid storage container 100 can be ensured.
In the above embodiment, the notch K is provided in the fold line P, but the portion may be a cut. Even in such a configuration, it can be handled in the same manner as in the above embodiment. Further, in the case of the incision, since it can be produced more easily than providing a notch crease, the working efficiency of the process of providing a crease in the liquid storage container 100 can be improved.

The configuration as described above is not limited to the liquid storage container 100 according to the modification of the first embodiment, but is similarly configured for the liquid storage containers 200 to 400 according to modifications of the second embodiment to the fourth embodiment. be able to.
Moreover, you may comprise about the outer side crease | fold P with both the outer side crease | fold P which provides the notch K, and the outer side fold line P which does not provide the notch K. For example, in the liquid container 100 according to the modification of the first embodiment, the folds V1 to V4 of the right isosceles triangle shown in FIG. 1A are folded while forming a triangular surface, and FIG. 1), the side surfaces 1 to 4 are folded so as to fit inside the liquid storage container 100 so that the upper and lower sides form the same plane through the constricted portion 50 as shown in FIG. 1 (c). It is. Here, the folds forming the right-angled isosceles triangle folds V1 to V4 overlap each other, and the thickness of the paper in the vicinity of the folds increases accordingly, which may make folding difficult. Therefore, it is possible to adopt a configuration in which the notch K is provided only in the outer fold line P constituting the fold lines V1 to V4 of the right isosceles triangle. As described above, the configuration in which the cutouts K are provided in the outer folds P of some of the folds is similarly configured for the folds in the liquid storage containers 200 to 400 according to the modified examples of the second to fourth embodiments. can do. Therefore, for example, notches K may be provided in all outer folds P depending on the size of the liquid storage container, the amount of liquid stored therein, or the material of the paper constituting the liquid storage container. Alternatively, the outer fold line P may be selected and the outer fold line P may be provided with a notch K.
In the above embodiment, the notch K is provided in the fold line P, but the portion may be a cut. Even in such a configuration, it can be handled in the same manner as in the above embodiment.

[Extensible sheet]
The liquid storage container 100 according to the present invention can protect each crease with an extensible sheet. Thereby, it is possible to reliably prevent the exterior of the side surface of the liquid storage container 100 from being broken by the apex of the corner formed by the fold. Moreover, as shown in FIG.1 (b), the constriction part 50 and the constriction part 51 for a handle are parts with a high frequency which a user has. Therefore, the strength of the liquid storage container 100 can be improved by providing the extensible sheet at the fold. Examples of the material of the extensible sheet include polyethylene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, polypropylene, polyester, polycarbonate, polystyrene, polyacrylonitrile, ethylene-vinyl alcohol copolymer, and nylon.

[Another embodiment]
In the liquid storage containers 100 to 400 according to the first embodiment to the fourth embodiment, as shown in the development views of FIGS. Therefore, as described above, when the side surfaces 1 to 4 are folded according to a predetermined folding method, corners having folds as vertices are formed. In the above, in order to solve the problems caused by the apexes (corners), the fold is configured as a plurality of folding lines. Here, for example, as shown in FIG. 1B, among the folds of the liquid storage container 100, the corner formed by the folds related to the folds V <b> 1 to V <b> 4 of the right isosceles triangle is inward of the liquid storage container 100. Since it protrudes, the possibility that the side surface of the liquid storage container 100 relating to the location is torn is higher than the angle formed by other folds. Therefore, a fold is formed in the liquid storage container so that the folds forming the folds V1 to V4 of the right isosceles triangle do not form an intersection, and the vertex of the corner is not formed by the folds V1 to V4 of the right isosceles triangle. A liquid container 500 according to another embodiment can also be configured.

  FIG. 9 is an explanatory diagram relating to the liquid storage container 500 according to another embodiment. FIG. 9A is a development view of the liquid storage container 500. FIG. 9B is an enlarged view of a portion surrounded by a solid line circle in FIG. As shown to Fig.9 (a), the liquid storage container 500 is comprised from four rectangular side surfaces 1-4, the upper parts 5-8, and the lower parts 9-12 similarly to 1st embodiment, and a spout 13 is provided at the approximate center of the upper part 5. The upper portions 5 to 8 have margin portions 14 to 17, the lower portions 9 to 12 have margin portions 18 to 21, the side surface 2 has a margin portion 22, and the inner side (back side) of the side surface 3 has a margin pasting portion 23 ( A portion indicated by a hatched portion) is provided, and side surfaces 1 to 4, upper portions 5 to 8, and lower portions 9 to 12 are connected to each other. The upper portions 6 and 8 are provided with a fold line G for forming a roof, and the lower portions 10 and 12 are provided with a fold line H for forming the bottom surface of the liquid storage container 500. In the development view of FIG. 9A, the folds (that is, the fold line G and the fold line H) to be valley-folded are indicated by broken lines. When a sheet of waterproof cardboard or the like shown in the developed view of FIG. 9A is appropriately overlapped with the margins 14 to 17 and the crease G is folded into a valley, a gable top roof is formed by the upper parts 5 to 8. It is formed. Further, when the margin portions 18 to 21 are appropriately overlapped and the fold line H is folded to the inside of the liquid storage container 500, the bottom surface of the liquid storage container 500 is formed. The upper portions 5 to 8, the side surfaces 1 to 4, and the lower portions 9 to 12 of the liquid storage container 500 are appropriately folded, and the margin portion 22 connected to the side surface 2 and the margin pasting portion 23 inside the side surface 3 are appropriately overlapped. Further, when assembled according to the procedure described later, a liquid storage container 500 having the same shape as the liquid storage container 100 shown in FIG. 1B can be assembled.

<Folds on the side>
As shown to Fig.9 (a), the liquid storage container 500 which concerns on another embodiment is a liquid storage container similar to the fold provided in 1st embodiment, and the position in which a fold is provided is 1st embodiment. The liquid storage container 100 is substantially the same. First, three creases L1, L2, and L3 are provided so as to cross the four side surfaces 1 to 4 in parallel to each other and at equal intervals. Next, right-angled isosceles triangle folds V17 to V20 correspond to right-angled isosceles triangle folds V1 to V4, folds S65 to S80 correspond to folds S1 to S16, and folds T17 to T20 correspond to folds T1 to T4. Equivalent to. Here, in the crease V17 having a right isosceles triangle shape, the creases S67 and S68 and the crease T17 are provided so as not to form an intersection. Similarly, in the fold V18 having a right isosceles triangle shape, the folds S71, S72, and the fold T18, and in the crease V19 having a right angled isosceles triangle shape, the folds S75, S76, and the fold T19, a fold line having a right isosceles triangle shape. In V20, the fold lines S79 and S80 and the fold line T20 are provided so as not to form an intersection with each fold line. FIG. 9B is a diagram showing this easily. In the partially enlarged view of FIG. 9B, a portion D surrounded by a dotted circle has intersections of the folds S3 and S4 and the fold T1 in FIG. 1A according to the first embodiment. Part. Similarly, a portion E surrounded by a dotted circle is a portion where the intersections of the fold lines S7 and S8 and the fold line T2 exist in FIG. 1A which is the first embodiment. However, as shown in the partially enlarged view of FIG. 9B, in the liquid storage container 500 according to another embodiment, the folds S67, which correspond to the folds S3 and S4 and the fold T1 in the first embodiment, There are no intersections in S68 and fold line T17. Similarly, there are no intersections in fold lines S71, S72, and fold line T18 corresponding to fold lines S7, S8, and fold line T2. When the side surfaces 1 to 4 are folded according to the folds thus provided, corners having apexes are not formed by the folds forming the right-angled isosceles triangle-like folds V17 to V20. As a result, the side surfaces 1 to 4 of the liquid storage container 500 can be hardly broken.

[Handling of liquid container after use]
The handling of the liquid storage container according to the present invention after use will be described by taking the liquid storage container 100 of the first embodiment as an example.

  As described in “Background Art”, the liquid storage container 100 after the use of the liquid inside is usually discarded or collected for recycling. At that time, if the three-dimensional shape shown in FIG. 1B is developed, the liquid storage container 100 is not bulky and can be easily collected. In order to develop the liquid storage container 100 having a three-dimensional shape, it is necessary to open the liquid storage container 100 with a cutter knife or the like. Here, since the liquid storage container 100 is provided with a fold, it can be used as a guide for opening the fold. In particular, in the liquid storage container 100 forming the constricted portion 50, the crease L2 is a valley fold toward the inside of the liquid storage container 100, so that it is easy to apply a cutter knife or the like to the crease L2. You can make a notch. The folds S3, S4, S7, S8 and the like which are valley-folded similarly to the crease L2 can also be used as a guide for cutting, and can be easily cut with a cutter knife or the like. Thus, the liquid storage container 100 can be easily cut open by making a cut with a cutter knife or the like in the folds that are valley-folded. Therefore, even when the size of the liquid storage container 100 is large, the liquid storage container 100 can be easily developed from a three-dimensional shape, and the liquid storage container 100 can be discarded and collected smoothly.

  Further, when the outer fold P is notched or cut in the fold of the liquid storage container 100, the outer fold P can be used as a guide when the liquid storage container 100 is opened. For this reason, the operation of opening the liquid storage container 100 with a cutter knife or the like can be easily performed. Therefore, even when the size of the liquid storage container 100 is large, it can be developed from a three-dimensional shape more easily than a normal fold (that is, a fold where the outer fold P is not provided with a notch or a cut), The disposal and recovery of the liquid storage container 100 can be performed smoothly.

  The liquid storage container of the present invention is used for containers for storing foods such as liquors, soft drinks, and liquid seasonings. In addition, for example, daily necessities such as cosmetics, liquid detergents, and shampoos, and fats and oils, It can be used as a container for storing industrial products such as solvents and paints.

1 to 4 Sides 5 to 8 Upper part 9 to 12 Lower part 13 Spout 14 to 22 Margin part 23 Paste part 50, 60, 70, 80 Constriction part 51, 61, 71, 81 Constriction part for handle 100, 200, 300 , 400 Liquid storage container L1-L12 Fold S1-S64 Fold T1-T16 Fold V1-V16 Right-angled isosceles triangular crease R crease (spreading part)
Q crease (margin)
M Outer side surface N Inner side surface P Outer fold line U Inner fold line W, K Notch a Height of right isosceles triangle b Side width x Side height y Length from upper end of side surface to crease

Claims (11)

A liquid storage container that is surrounded by four side surfaces and has a spout provided above one of the side surfaces,
Three parallel folds are provided across the four sides,
Further, on one side surface of the four side surfaces and the side surface opposite to the side surface, two right-angled isosceles triangle folds are formed between the two edges of each side surface and the right-angled two sides between the three parallel folds. It is provided on both sides so that the hypotenuse of the equilateral triangle is shared,
The vertex of the corner is formed because the crease of the right isosceles triangle and the fold located at the center of the three parallel folds are not provided with the crease at the corner of the right isosceles triangle. Configured to not
When four sides are folded according to all the creases, a part of each side is recessed inward so as to form a constricted portion, and the upper and lower portions of each side constitute the same plane through the constricted portion container.   2. The liquid container according to claim 1, wherein the creases of the right isosceles triangle are provided on a side surface on the side where the pouring spout is provided and a side surface facing the side surface.   The crease of the right isosceles triangle is 1b / 15, where a is the height when the hypotenuse of the right isosceles triangle is the base, and b is the width of the side surface on which the crease of the right isosceles triangle is provided. The liquid container according to claim 1 or 2, wherein the liquid container is provided so as to satisfy a range of ≤a≤1b / 2.   In the three parallel folds, the height of the four side surfaces is x, and the length from the upper end of the four side surfaces to the fold located at the center of the three parallel folds is y. The liquid storage container according to any one of claims 1 to 3, wherein the liquid storage container is provided to satisfy a range of 1x / 8≤y≤7x / 8.   The liquid container according to any one of claims 1 to 4, wherein a plurality of the constricted portions are provided.   At least one constricted portion of the plurality of constricted portions has a pair of opposed side surfaces provided with a right-angled isosceles triangle fold, and a pair of opposed side surfaces provided with a right-angled isosceles fold. The liquid storage container according to claim 5, wherein the liquid storage container is provided different from the side surface.   The liquid container according to claim 5 or 6, wherein the plurality of constricted portions are provided so as to be adjacent to each other in a height direction of the four side surfaces.   The liquid storage container according to any one of claims 1 to 7, wherein the fold is composed of a plurality of folding lines.   The four side surfaces are configured in series, and a marginal portion is provided on one side edge portion of any one of the four side surfaces, and the marginal portion of the side surfaces adjacent to the side surface is provided. There is provided a margin affixing portion that is overlapped on the outer side of the marginal portion on a side surface that is in contact with the side edge on the side where the margin is provided, and a notch or a notch is provided in the fold provided in the margin affixing portion. The liquid container according to any one of claims 1 to 8.   The said fold is comprised from the outer side crease formed in the outer side of the said side surface, and the inner side crease formed in the inner side of the said side surface, The notch or notch | incision is provided in the said outer side fold. The liquid container according to any one of the above.   The liquid container according to any one of claims 1 to 10, wherein an extensible sheet that covers the fold is provided on the side surface.

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