Liquid storage container

Abstract

To provide a liquid storage container whose exterior body can be easily assembled.SOLUTION: A liquid storage container 1 comprising an inner bag body 2 for storing a content and an outer bag body 3 attached to the inner bag body 2, wherein the inner bag body 2 has a spout 10 having a shaft-shaped part 70 formed thereon, and the outer bag body 3 is a molded body made of paper and / or pulp, and is composed of a pair of half members 30 and 40 that, when combined together to sandwich the shaft-shaped part 70 in a radial direction, form a columnar body part 3b and a flat top part 3a that engages with the shaft-shaped part 70. The pair of half members 30 and 40 can be separated from each other at a seam 50, and notches 61 and 62 having a pair of linear parts 61a and 62a extending in the direction of separation of the half members 30 and 40 are provided in the part constituting the top part 3a of the pair of half members 30 and 40, and the spout 10 has a pair of abutting parts that can abut against end parts of the pair of linear parts 61a and 62a in a separating direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a liquid storage container that includes an inner pouch for storing contents and an outer pouch attached to the inner pouch. [Background technology]

[0002] Known liquid storage containers of this type include those in which an inner container is disposed inside a pulp molded outer shell (see, for example, Patent Document 1).

[0003] In the liquid storage container of Patent Document 1, the inner container is constructed by thermally bonding a spout (stopper) for pouring the contents to a pouch (bag-like body) for storing the contents. Meanwhile, the outer shell has a cylindrical body extending vertically and a neck tapering upward from the body, the tip (upper end) of which engages with the spout. This outer shell is constructed by combining two pulp molded products. These two pulp molded products are formed into a shell shape that is like cutting the outer shell vertically down the center and dividing it in half. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2023-55410 Summary of the Invention [Problem to be solved by the invention]

[0005] In the liquid storage container of Patent Document 1, the upper end of the neck, which tapers upward from the body, engages with the spout, resulting in a relatively large neck length between the upper end of the body and the spout. Therefore, in order to combine two pulp-molded products and maintain the shape of the outer shell, it is necessary to provide locking means not only in the portions of the two pulp-molded products that correspond to the body of the outer shell, but also in the portions that correspond to the neck of the outer shell, to lock the two pulp-molded products from the body to the neck. In this case, assembling the outer shell requires a process of locking the portions of the two pulp-molded products that correspond to the body of the outer shell and a process of locking the portions that correspond to the neck of the outer shell, which is time-consuming. Therefore, there is room for improvement in terms of simplifying the assembly of the outer shell.

[0006] The present invention has been made in view of the above-mentioned problems, and has an object to provide a liquid storage container whose exterior body can be easily assembled. [Means for solving the problem]

[0007] The liquid storage container according to the present invention for solving the above problems has the following characteristic configuration: an inner bag body in which contents are stored; an outer body attached to the inner bag body; A liquid storage container comprising: The inner bag body has a spout having a shaft-shaped portion formed therein, The outer casing is a molded body made from paper and / or pulp, and is composed of a pair of half-members that, when combined to sandwich the shaft-shaped portion from the radial direction, form a columnar body portion and a flat top portion that engages with the shaft-shaped portion.

[0008] According to this liquid storage container, the outer casing, which is a molded article made from paper and / or pulp, is composed of a pair of half members. When the pair of half members are combined so as to sandwich the axial portion of the spout of the inner pouch from the radial direction, a columnar body is formed, along with a flat top portion that engages with the axial portion of the spout. When the flat top portion engages with the axial portion of the spout, the top portion is positioned at the upper end of the body, and the neck portion found in conventional liquid storage containers (Patent Document 1) is essentially eliminated. Therefore, the shape of the outer casing can be sufficiently maintained by simply engaging the portions of the pair of half members that correspond to the body of the outer casing, without engaging the portions of the pair of half members that correspond to the top portion of the outer casing. Therefore, the assembly process for the outer casing can be simplified compared to conventional methods, making it easier to assemble the outer casing.

[0009] In the liquid storage container according to the present invention, the pair of half members can be separated from each other at a joint between the pair of half members, a notch having a pair of linear portions extending in a direction in which the half members are pulled apart is provided in a portion constituting the top portion of at least one of the pair of half members; The spout preferably has a pair of abutting portions that can abut against the ends of the pair of linear portions in the separating direction.

[0010] With this liquid storage container, when an external force (torque) is applied that rotates the inner pouch relative to the outer shell around the axis of the spout's axial portion, the pair of abutting portions on the spout abut against the ends of the pair of linear portions of the notches provided in the half members in the direction of separation. When the pair of abutting portions abut against the ends of the pair of linear portions in the direction of separation, most of the external force acts on the ends of the pair of linear portions in the direction of separation perpendicular to the direction of separation, minimizing the external force acting on the half members in the direction of separation. This prevents the inner pouch from rotating relative to the outer shell, and prevents the pair of half members constituting the outer shell from opening in the direction of separation, even if, for example, an opening torque is applied around the axis of the spout's axial portion to open a cap threaded onto the spout.

[0011] In the liquid storage container according to the present invention, It is preferable that the exterior body does not have a neck portion that is narrowed to cover the shaft portion.

[0012] If the outer packaging body has a neck that is narrowed to cover the axial portion of the spout, the portion of the inner bag body that corresponds to the neck of the outer packaging body in the bag portion (pouch) that is attached to the spout must be formed into a tapered shape to match the narrowed shape of the neck, and a typical rectangular pouch cannot be used.With the liquid storage container of this configuration, the outer packaging body does not have a neck that is narrowed to cover the axial portion of the spout, so a typical rectangular pouch can be used as the bag portion of the inner bag body, and manufacturing costs can be reduced.

[0013] In the liquid storage container according to the present invention, The spout preferably has a protruding portion that covers at least a portion of the joint between the pair of half members from the outside and / or inside of the exterior body.

[0014] According to the liquid storage container of this configuration, the protruding portion can make the seam between the pair of half members invisible or less noticeable from the outside, thereby improving the aesthetic appearance and preventing tampering, such as prying open the seam and introducing foreign objects. Furthermore, even if a force is applied to push or pull the inner bag against the outer case, the protruding portion catches on the top portion around the seam, preventing the inner bag from collapsing into the outer case or from slipping out of the outer case. However, in a pair of half members that constitute an outer case, which is a molded product made from paper and / or pulp, the top-forming portion of each half member tends to bulge outward after molding. Therefore, by providing a protruding portion that covers the seam from the outside of the outer case, the protruding portion can prevent the top-forming portion from bulging outward, making it easier and more reliable to butt the butted end faces of the top-forming portions of the pair of half members together.

[0015] In the liquid storage container according to the present invention, The spout preferably has a pair of flanges that sandwich the top portion.

[0016] According to the liquid storage container of this configuration, the top portion is clamped by a pair of flange portions provided on the spout, so that the top portion of the outer casing can be stably maintained in engagement with the axial portion of the spout.

[0017] In the liquid storage container according to the present invention, It is preferable that one of the pair of flange portions is provided with a protruding portion that protrudes toward the other flange portion.

[0018] With this configuration of liquid storage container, a pressing force from the protruding portion acts on the top portion sandwiched between a pair of flange portions, thereby enabling the top portion of the outer casing to be kept more stably engaged with the axial portion of the spout.

[0019] In the liquid storage container according to the present invention, It is preferable that the outer body is attached to the inner bag body by engaging a locking portion and / or a locked portion formed on the side edge of one of the pair of half-members with a locking portion and / or a locking portion formed on the side edge of the other half-member.

[0020] With this configuration of liquid storage container, the shape of the outer body is maintained by engaging the locking portion and / or lockable portion formed on the side edge of one half-member with the lockable portion and / or locking portion formed on the side edge of the other half-member, so that the outer body can be stably maintained attached to the inner bag body without using adhesive.

[0021] In the liquid storage container according to the present invention, It is preferable that a sheet is wrapped around or attached to the body portion.

[0022] According to the liquid storage container of this configuration, the outer casing is reinforced by wrapping or adhering a sheet around the body of the outer casing, thereby suppressing deformation of the outer casing and maintaining a stable shape as a container. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a diagram showing the entire liquid storage container according to one embodiment of the present invention. [Figure 2] FIG. 2 is an exploded perspective view of the inner pouch of the liquid storage container. [Figure 3] FIG. 3 is a view showing the liquid storage container with the cap removed. [Figure 4] FIG. 4 is a diagram showing a spout used in a liquid storage container. [Figure 5] FIG. 5 is a diagram showing a state in which the top portion is sandwiched between the upper and lower flange portions of the spout. [Figure 6] FIG. 6 is an explanatory diagram of the engagement structure between the top part of the exterior body and the shaft part of the spout. [Figure 7] FIG. 7 is an explanatory diagram of the first alternative embodiment. [Figure 8] FIG. 8 is an explanatory diagram of the second modified embodiment. [Figure 9] FIG. 9 is an explanatory diagram of the third alternative embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0024] The present invention will be described below with reference to the drawings. However, the present invention is not intended to be limited to the embodiments described below or the configurations shown in the drawings. Furthermore, the liquid storage containers shown in the drawings do not strictly depict the actual structure or shape, and details are omitted.

[0025] <Overall structure of liquid storage container> FIG. 1 is a diagram showing the entire liquid storage container 1 according to one embodiment of the present invention. FIG. 1(a) is an external perspective view of the liquid storage container 1. FIG. 1(a') ​​is a diagram showing a state in which a sheet 100 is wound and attached to a body portion 3b of the liquid storage container 1 shown in FIG. 1(a). FIG. 1(b) is an exploded perspective view of the liquid storage container 1. In FIGS. 1(a) and 1(b), a portion is shown in a see-through state. As shown in FIGS. 1(a) and 1(b), the liquid storage container 1 comprises an inner pouch 2 in which liquid contents are stored, and an outer pouch 3 attached to the inner pouch 2.

[0026] <Inner bag> Fig. 2 is an exploded perspective view of the inner pouch 2 of the liquid storage container 1 in this embodiment. Note that Fig. 2 shows that the laminate 20, which will be described later, is composed of a plurality of layers, but the thickness relationships between the layers have been appropriately exaggerated for ease of understanding, and do not strictly reflect the magnitude relationships (scale) of the thicknesses of the layers in the actual laminate 20.

[0027] As shown in Fig. 2, the inner pouch 2 includes a flexible rectangular pouch 5, a spout 10 attached to the pouch 5, and a cap 15 attached to the spout 10. The spout 10 will be described in detail later, and here the pouch 5 and cap 15 will be described.

[0028] As shown in FIG. 2, the pouch 5 includes a pair of rectangular sheet-shaped laminates 20. As shown in the partially enlarged view of FIG. 2, the laminate 20 includes an outer layer 21, a middle layer 22, and an inner layer 23. The pouch 5 is constructed by overlapping the pair of laminates 20 so that the inner layers 23 face each other, and integrally joining the upper edge peripheral portion 20a of the pair of overlapping laminates 20, excluding the widthwise center of the upper edge, the side edge peripheral portions 20b on both widthwise sides, and the bottom edge peripheral portion 20c on the bottom edge, by heat sealing. The pouch 5 and the spout 10 are integrally joined by heat sealing, with a seal portion 74 of the spout 10 (described later) inserted and sandwiched into an upper opening 5a opened on the upper edge of the pouch 5. The contents are then filled through the spout 10, and a cap 15 is attached to the spout 10 to seal it, thereby constructing the inner pouch 2 shown in FIG. 1(b). Although the pouch 5 shown here is in the form of a four-sided sealed pouch, it is not limited to this and may be in the form of a gusset pouch, a self-standing pouch, a three-sided sealed pouch, or the like.

[0029] 2, the outer layer 21 is preferably made of a film having excellent mechanical strength, rigidity, etc., because it is the material that forms the base of the pouch 5. Examples of the film that can be used include synthetic resin films such as polypropylene, polyethylene terephthalate, and nylon, and metal-deposited films obtained by depositing aluminum or a metal (metal oxide) such as aluminum oxide, silicon oxide, indium oxide, tin oxide, and zirconium oxide on the film.

[0030] The intermediate layer 22 is provided when light-shielding properties or gas barrier properties are required, and may be made of the above-mentioned synthetic resin film, the above-mentioned metal-deposited film, or metal foil such as aluminum or iron. Alternatively, a laminate of two or more of these films may be used.

[0031] A thermoplastic resin that exhibits heat fusion properties is preferably used for the inner layer 23. Examples of thermoplastic resins include polyolefin resins such as low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear low-density polyethylene, polypropylene, ethylene-polypropylene copolymer, and ethylene-vinyl acetate copolymer, polyvinyl acetate resins, and polyvinyl chloride resins. The inner layer 23 may be a single-layer film made of a single resin, or a multi-layer film made of multiple resins.

[0032] The cap 15 has a top portion 25 and a cylindrical portion 26 that hangs down from the periphery of the top portion 25. The cylindrical portion 26 has a number of vertically extending grooves 26a on its outer periphery, which function as a non-slip surface when the cap 15 is held and rotated with fingers. A female thread 26b is formed on the inner periphery of the cylindrical portion 26 of the cap 15, which can be threaded with a male thread 75 (described later) of the spout 10. The cap 15 is formed as a molded product by injection molding or compression molding, in which a resin is injected into a mold. Examples of resins that can be used for the cap 15 include low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear low-density polyethylene, polypropylene, ethylene-propylene copolymer, and acrylonitrile-butadiene-styrene copolymer (ABS). In addition, instead of the screw-fit type cap 15, a hinged cap that is connected to the shaft-shaped portion 70 described later via a hinge and opens and closes the opening of the shaft-shaped portion 70 may be used.

[0033] <Exterior body> FIG. 3 shows the liquid storage container 1 of this embodiment with the cap 15 removed. FIG. 3(a) is a plan view, and FIG. 3(b) is a front view with a portion cut away. As shown in FIGS. 3(a) and 3(b), the exterior body 3 has a top portion 3a, a body portion 3b, and a bottom portion 3c, and is formed in a generally rectangular shape when viewed from the front. The top portion 3a is formed in the shape of a flat elliptical disk that is elliptical in plan view and extends horizontally. The body portion 3b is formed in the shape of an elliptical cylinder with substantially constant major and minor axes throughout the entire longitudinal direction (vertical direction). The bottom portion 3c is formed in the shape of an ellipse in plan view that bulges slightly upward. As shown in FIG. 3(b), the corners where the top portion 3a and the body portion 3b intersect and the corners where the body portion 3b and the bottom portion 3c intersect are rounded in the shape of a convex arc.

[0034] The outer casing 3 is a molded body containing, as raw materials, paper and / or pulp, which is a type of molding sheet and / or molding filler. The outer casing 3 may be paper containing 50% or more pulp fibers (cellulose fibers), or may be mixed paper containing resin fibers in addition to pulp fibers.

[0035] 1(b), the exterior body 3 is composed of a pair of half members 30, 40 that are shaped like a piece of exterior body 3 cut lengthwise down the center and divided into two. Here, examples of methods for forming the pair of half members 30, 40 include press molding, in which a paper sheet is coated or printed in advance (this is not a required step), and then sandwiched between press dies from above and below to apply pressure and, if necessary, heat to form the paper sheet into a desired shape; pulp molding, which uses a slurry of wood pulp fibers such as recycled paper pulp and virgin pulp, or non-wood fibers such as reed, straw, and hemp as raw materials; vacuum forming, pressure forming, vacuum pressure forming, and other methods.

[0036] 1(b), the one-side half member 30 disposed on one side (right side) has a one-side peripheral surface forming portion 30a, a one-side top portion forming portion 30b, and a one-side bottom portion forming portion 30c. Here, the one-side peripheral surface forming portion 30a forms the peripheral surface portion of one half of the exterior body 3. The one-side top portion forming portion 30b is composed of a plate-like member integrally connected to the upper end of the one-side peripheral surface forming portion 30a, and abuts against the other-side top portion forming portion 40b (described later) to form the top portion 3a, which is the flat ceiling portion of the exterior body 3. The one-side bottom portion 30c is integrally connected to the lower end of the one-side peripheral surface forming portion 30a, and overlaps with the other-side bottom portion forming portion 40c (described later) to form the bottom portion 3c, which is the bottom portion of the exterior body 3.

[0037] 1(b), one-side support piece 31 is bendably connected to one-side circumferential surface forming portion 30a so as to extend corresponding to body portion 3b of exterior body 3. The boundary between one-side circumferential surface forming portion 30a and one-side support piece 31 is a so-called fold that allows one-side support piece 31 to be bent relative to one-side circumferential surface forming portion 30a, and one-side first notch portion 32 and one-side second notch portion 33 are provided at the boundary, extending in the longitudinal direction of the fold, at a predetermined interval in the extending direction. One-side first insertion piece 34 and one-side second insertion piece 35 are bendably connected to one-side circumferential surface forming portion 30a so as to correspond to body portion 3b of exterior body 3 at a predetermined interval in the vertical direction.

[0038] The other-side half member 40, which is disposed on the other side (left side) in FIG. 1(b), has an other-side peripheral surface forming portion 40a, an other-side top portion forming portion 40b, and an other-side bottom portion forming portion 40c. Here, the other-side peripheral surface forming portion 40a forms the peripheral surface portion of the other half of the exterior body 3. The other-side top portion forming portion 40b is composed of a plate-like member that is integrally connected to the upper end side of the other-side peripheral surface forming portion 40a and abuts against the one-side top portion forming portion 30b to form the top portion 3a, which is the flat ceiling portion of the exterior body 3. The other-side bottom portion forming portion 40c is integrally connected to the lower end side of the other-side peripheral surface forming portion 40a and overlaps with the one-side bottom portion forming portion 30c to form the bottom portion 3c, which is the bottom portion of the exterior body 3.

[0039] The other half member 40 has a symmetrical structure to the one half member 30. That is, on the side edge portion appearing on the left side in FIG. 1(b) of the other-side peripheral surface forming portion 40a of the other half member 40, an other-side receiving piece 41 is formed to pair with the one-side receiving piece 31 of the one half member 30, and an other-side first recess portion 42 and an other-side second recess portion 43 are formed to pair with the one-side first recess portion 32 and one-side second recess portion 33 of the one half member 30. Furthermore, on the side edge portion appearing on the right side in FIG. 1(b) of the other-side peripheral surface forming portion 40a of the other half member 40, an other-side first insertion piece 44 and an other-side second insertion piece 45 are formed to pair with the one-side first insertion piece 34 and one-side second insertion piece 35 of the one half member 30.

[0040] <Locking part, locked part> In the pair of half members 30, 40, when the state shown in Figure 1(b) is changed to the state shown in Figure 1(a) in which the insertion pieces 44, 45, 34, 35 are inserted into the respective cutout portions 32, 33, 42, 43 to engage with the respective cutout portions 32, 33, 42, 43 and the respective insertion pieces 44, 45, 34, 35, and the spout 10 is assembled so as to sandwich the shaft-shaped portion 70 described later in the radial direction (a direction perpendicular to the axial direction of the shaft-shaped portion 70), a flat top portion 3a that engages with the shaft-shaped portion 70, an elliptical cylindrical body portion 3b, and a bottom portion 3c that bulges slightly upward are formed. 1(a), by pulling the pair of half-members 30, 40 apart by pulling the insertion pieces 44, 45, 34, 35 out of the notches 32, 33, 42, 43, the pair of half-members 30, 40 can be pulled apart along the seam 50 of the pair of half-members 30, 40 in a direction perpendicular to the direction in which the seam 50 extends, more specifically, in a direction perpendicular to the direction in which the butting end faces 51, 52 (see FIG. 1(b)) that abut when the one-side top-forming portion 30b and the other-side top-forming portion 40b are butted together extend. The direction in which the pair of half-members 30, 40 are pulled apart as described above will be referred to below simply as the "separating direction," and is indicated by the outline arrow in FIG. 1(b). In the pair of half members 30, 40, the insertion pieces 34, 35, 44, 45 correspond to the "locking portion" in the present invention, and the cutout portions 32, 33, 42, 43 correspond to the "locked portion" in the present invention.

[0041] <Notch, engagement hole> 1(b), the one-side top forming portion 30b is provided with a one-side notch 61 having a pair of linear portions 61a extending in the direction in which the one-side half-member 30 is pulled apart, at the center of the extending direction of the butting end face 51. Similarly, the other-side top forming portion 40b is provided with an other-side notch 62 having a pair of linear portions 62a extending in the direction in which the other-side half-member 40 is pulled apart, at the center of the extending direction of the butting end face 52.

[0042] <Spout> FIG. 4 is a diagram showing a spout 10 used in the liquid storage container 1 of this embodiment. FIG. 4(a) is a perspective view of the spout 10, FIG. 4(b) is a front view of the spout 10, and FIG. 4(c) is a side view of the spout 10. The spout 10 is preferably made of a synthetic resin that has excellent moldability and processability. Examples of synthetic resins include polyolefin resins such as polyethylene and polypropylene, polystyrene resin, polyamide resin, polyester resin, acrylic resin, vinyl chloride resin, vinylidene chloride resin, and polyethersulfone. From the standpoint of cost and other factors, it is preferable to use an appropriate molding method such as injection molding to perform integral molding.

[0043] Spout 10 has spout body 10a formed with a tubular (cylindrical in this example) shaft-like portion 70 having through-hole 7 opening in the axial direction, and upper flange portion 71, lower flange portion 72, a pair of rib portions 73, and seal portion 74 formed integrally with spout body 10a. Spout 10 is configured so that contents can be filled into pouch 5 or poured out of pouch 5 through through-hole 7. In the following description, unless otherwise specified, the axial direction of shaft-like portion 70 refers to the up-down direction (vertical direction).

[0044] In the spout body 10a, a male threaded portion 75 is formed on the outer surface at one end of the shaft-shaped portion 70, which can be threaded with the female threaded portion 26b (see Figure 2) provided on the cap 15, and an annular protrusion 76 is formed to be located below and near the male threaded portion 75 to prevent rattling when the cap 15 is attached.

[0045] <Flange part> The upper flange portion 71 and the lower flange portion 72 are arranged with a predetermined gap in the axial direction of the shaft-shaped portion 70. Each of the upper flange portion 71 and the lower flange portion 72 is formed at an axially intermediate portion of the shaft-shaped portion 70 so as to protrude outward in the radial direction of the shaft-shaped portion 70. In the liquid storage container 1 of this embodiment, the top portion 3a is sandwiched between the upper flange portion 71 and the lower flange portion 72. This allows the top portion 3a of the exterior body 3 to be stably maintained engaged with the shaft-shaped portion 70 of the spout 10.

[0046] <Overhang> As shown in Figures 3(a) and 4(a), the upper flange portion 71 has a protruding portion 77 that protrudes so as to cover the seam 50 (see Figures 1(a) and 3(a)) formed by the butting end face 51 (see Figure 1(b)) of the one side top portion forming portion 30b and the butting end face 52 (see Figure 1(b)) of the other side top portion forming portion 40b from the outside of the outer casing 3.

[0047] 4(a) and (b), the pair of rib portions 73 extend in a rod shape between the upper flange portion 71 and the lower flange portion 72 in the direction in which the pair of half-members 30, 40 are pulled apart (the direction of the white arrow in FIG. 4(a)), and are formed integrally with the flange portions 71, 72 and the shaft-shaped portion 70 so as to sandwich the shaft-shaped portion 70 from both sides in the radial direction. The pair of rib portions 73 are portions that are grasped by a parts feeder during the manufacturing process of the inner pouch 2, and are also portions that are held by a jig when filling the pouch 5 with contents. The pair of rib portions 73 are also used to prevent the spout from rotating together when the cap 15 is closed.

[0048] <Protrusion> As shown in FIGS. 4(b) and 4(c), the lower flange portion 72 is provided with a protruding portion 78 that protrudes toward the upper flange portion 71. The protruding portion 78 is formed on the lower flange portion 72 so as to extend in a mountain shape along the separation direction (the direction of the white arrow in FIG. 4(c)) of the pair of half members 30, 40. That is, the protruding portion 78 is formed in a shape with an inclined surface 78b such that the protruding height from the lower flange portion 72 is greatest at a separation direction central portion 78a and the protruding height from the lower flange portion 72 gradually decreases from the separation direction central portion 78a toward both ends in the separation direction. Note that, although the protruding portion 78 is formed as a mountain-shaped protrusion in this example, it is not limited thereto. Any structure that makes it difficult for the top portion 3a (one-side top-portion forming portion 30b, the other-side top-portion forming portion 40b) of the outer casing 3 to come off may be used, for example, a rib-like linear protrusion or a needle-like protrusion.

[0049] As shown in FIGS. 4(a) and 4(c), the seal portion 74 is formed in a boat shape having two side surfaces that are fixed to the pouch 5 by a fixing means such as fusion (welding) or adhesive. On each side surface, linear recesses 74a and linear protrusions 74b extending along the radial direction of the shaft-shaped portion 70 are alternately arranged along the axial direction of the shaft-shaped portion 70, and these linear recesses 74a and linear protrusions 74b increase the fusion strength to the pouch 5. Note that in this example, the seal portion 74 is formed in a boat shape, but is not limited thereto. For example, the seal portion 74 may be formed in a cylindrical shape or in a plate-like shape (e.g., a disk-like shape) that protrudes from the shaft-shaped portion 70 in the radial direction. When the seal portion 74 has a plate-like protrusion shape, for example, the spout 10 and the pouch 5 may be integrated by welding the top surface of the seal portion 74 to the pouch 5.

[0050] Fig. 5 is a cross-sectional view of the main part taken along the line AA in Fig. 3, showing the state in which the top portion 3a of the exterior body 3 is sandwiched between the upper and lower flange portions 71, 72 of the spout 10. Fig. 6 is an explanatory diagram of the engagement structure between the top portion 3a of the exterior body 3 and the shaft portion 70 of the spout 10. Fig. 6(a) is a cross-sectional view taken along the line BB in Fig. 3(b), and Fig. 6(b) is a view of the state in Fig. 6(a) in which the pair of half members 30, 40 have been pulled apart from each other in the pulling-apart direction.

[0051] The top portion 3a of the exterior body 3 and the shaft-shaped portion 70 of the spout 10 can be engaged (fitted) as follows. First, as shown in FIG. 6(b), both end faces in the extension direction of the pair of rib portions 73 are aligned with the respective rear surfaces of the one-side notch 61 and the other-side notch 62. At the same time, the one-side top-forming portion 30b and the other-side top-forming portion 40b are positioned between the upper flange portion 71 and the lower flange portion 72. Next, as shown in FIGS. 5 and 6(a), the one-side top-forming portion 30b and the other-side top-forming portion 40b are inserted between the upper flange portion 71 and the lower flange portion 72 so that the butting end faces 51, 52 of the one-side top-forming portion 30b and the other-side top-forming portion 40b are butted against each other.

[0052] When the one-side top portion forming portion 30b and the other-side top portion forming portion 40b are inserted between the upper flange portion 71 and the lower flange portion 72, a pressing force from the protruding portion 78 acts on each of the one-side top portion forming portion 30b and the other-side top portion forming portion 40b in a direction from the protruding portion 78 toward the upper flange portion 71. In this embodiment, the protruding height from the lower flange portion 72 gradually increases as the protruding portion 78 moves along the inclined surface 78b of the protruding portion 78 toward the separation direction central portion 78a of the protruding portion 78, so that the one-side top portion forming portion 30b and the other-side top portion forming portion 40b can be smoothly inserted between the separation direction central portion 78a of the protruding portion 78 and the upper flange portion 71. Furthermore, since a pressing force from the protrusion 78 acts on each top forming portion 30b, 40b, the state shown in Figures 5 and 6(a) in which the top portion 3a of the outer casing 3 is engaged with the axial portion 70 of the spout 10 can be maintained more stably.

[0053] <Engagement hole> In the state shown in Figures 5 and 6(a) in which the top portion 3a of the outer casing 3 and the axial portion 70 of the spout 10 are engaged to combine the half-member 30 on one side and the half-member 40 on the other side as described above, a rectangular (square in this example) engagement hole (fitting hole) 60 is formed by the one-side notch 61 and the other-side notch 62.

[0054] <Contact part> In the state shown in Figure 6(a), the pair of rib portions 73 have a pair of one-side abutment portions 65 that can abut against the ends of a pair of straight portions 61a of the one-side notch 61 provided in the one-side top forming portion 30b in the pulling-away direction (the direction indicated by the white arrow in Figure 6(a)), and also have a pair of other-side abutment portions 66 that can abut against the ends of a pair of straight portions 62a of the other-side notch 62 provided in the other-side top forming portion 40b in the pulling-away direction (the direction indicated by the white arrow in Figure 6(a)).

[0055] 1(b) to form the outer casing 3, the half members 30, 40 are positioned relative to the inner pouch 2 so that the top portion 3a of the outer casing 3 engages with the portion of the shaft portion 70 of the spout 10 where the pair of ribs 73 are provided, as described above. Next, while overlapping the bottom-forming portion 30c and the bottom-forming portion 40c, the first insertion piece 34 and the second insertion piece 35 are inserted into the first insertion portion 42 and the second cutout 43, respectively, and the first insertion piece 44 and the second insertion piece 45 are inserted into the first insertion portion 32 and the second cutout 33, respectively. As a result, the one-side first insertion piece 34 and the one-side second insertion piece 35 are locked to the other-side receiving piece 41, and the other-side first insertion piece 44 and the other-side second insertion piece 45 are locked to the one-side receiving piece 31, maintaining the shape of the exterior body 3 shown in FIG. 1(a) in which the one-side half member 30 and the other-side half member 40 are combined. In this way, the state in which the exterior body 3 is attached to the inner pouch 2 can be stably maintained without using adhesive. If necessary, a sheet 100 may be wrapped around and attached to the body portion 3b of the exterior body 3, as shown in FIG. 1(a'). In this way, the exterior body 3 is reinforced by the sheet 100, which suppresses deformation of the exterior body 3 and allows the shape of the container to be stably maintained.

[0056] 1(a), in the liquid storage container 1 of this embodiment, the flat top portion 3a engages with the shaft portion 70 of the spout 10, so that the top portion 3a is located at the upper end of the body portion 3, and the neck portion seen in conventional liquid storage containers (Patent Document 1) is substantially absent. Therefore, even if the portions of the pair of half members 30, 40 corresponding to the top portion 3a of the exterior body 3 are not engaged, the shape of the exterior body 3 can be sufficiently maintained by simply engaging the portions of the pair of half members 30, 40 corresponding to the body portion 3b of the exterior body 3. Therefore, when assembling the exterior body 3, the assembly process for the exterior body 3 can be simplified compared to conventional methods, and the exterior body 3 can be easily assembled.

[0057] In the liquid storage container 1 of this embodiment, the exterior body 3 is shaped so as not to have a neck portion that is narrowed so as to cover the shaft-like portion 70 of the spout 10. This allows a typical rectangular pouch 5 to be used as the bag portion of the inner pouch body 2, as shown in Fig. 1(b), thereby reducing manufacturing costs. Note that the exterior body 3 not having a neck portion that is narrowed so as to cover the shaft-like portion 70 of the spout 10 means that no structure having a peripheral surface that is parallel to the peripheral surface (peripheral surface forming portions 30a, 40a) of the exterior body 3 and that covers the shaft-like portion 70 is erected on the top portion 3a.

[0058] 6(a), in the liquid storage container 1 of this embodiment, when an external force (torque T1, T2) acts on the inner bag body 2 to rotate the inner bag body 2 relative to the outer body 3 around the axis of the shaft-like portion 70 of the spout 10, the pair of abutting portions 65, 66 of the pair of rib portions 73 abut on the ends of the pair of linear portions 61a, 62a in the separating direction. In this state where the pair of abutting portions 65, 66 abut, most of the external force F is directed in a direction perpendicular to the separating direction against the ends of the pair of linear portions 61a, 62a in the separating direction. 11 ,F 21 acts on the half members 30 and 40 in the direction of separating them, and an external force F 12 ,F 22 This can minimize the amount of rotation of the inner pouch 2 relative to the outer packaging body 3, even if an opening torque is applied around the axis of the shaft portion 70 of the spout 10 to open the cap 15 screwed onto the spout 10. This can prevent the inner pouch 2 from rotating relative to the outer packaging body 3, and can also prevent the pair of half members 30, 40 that make up the outer packaging body 3 from opening in the direction of being pulled apart.

[0059] 3(a), in the liquid storage container 1 of this embodiment, a protruding portion 77 is provided so as to cover the joint 50 between the pair of half members 30, 40 from the outside of the exterior body 3. This provides the following advantageous effects. (1) The protruding portion 77 can make the seam 50 invisible from the outside, which can prevent tampering such as prying open the seam 50 and introducing foreign matter. (2) When an impact force acts to push the inner bag body 2 into the inside of the outer body 3, the protruding portion 77 catches on the top portion 3a around the seam 50, thereby preventing the inner bag body 2 from collapsing into the inside of the outer body 3. (3) The pair of half members 30, 40 that make up the outer casing 3, which is a molded body made from paper and / or pulp, have a tendency for the top forming portions 30b, 40b of the half members 30, 40 to bulge outward after molding. However, the protruding portions 77 can prevent the top forming portions 30b, 40b from bulging outward, so that the butting end faces 51, 52 of the top forming portions 30b, 40b of the pair of half members 30, 40 can be butted together more easily and reliably.

[0060] The liquid storage container of the present invention has been described above based on one embodiment, but the present invention is not limited to the configuration described in the above embodiment, and the configuration can be changed as appropriate within the scope of the spirit of the present invention.

[0061] (Another embodiment 1) FIG. 7 is an explanatory diagram of Alternative Embodiment 1. FIG. 7(a) is a front view of a main portion of the exterior body 3 with a portion cut away. FIG. 7(b) is a cross-sectional view taken along the line CC in FIG. 7(a). In the above embodiment, only the protruding portion 77 is provided to cover the seam 50 from the outside of the exterior body 3. However, a protruding portion 80 may also be provided to cover the seam 50 from the inside of the exterior body 3. This prevents the inner pouch 2 from slipping out of the exterior body 3 even if a force acts to pull the inner pouch 2 out of the exterior body 3. It is possible to omit the protruding portion 77 and provide only the protruding portion 80. In this case, although the seam 50 covered by the protruding portion 77 cannot be hidden from the outside as in the case where the protruding portion 77 is provided, the seam 50 can be made less noticeable.

[0062] (Alternative embodiment 2) Fig. 8 is an explanatory diagram of Alternative Embodiment 2. In the above embodiment, an example was shown in which notches 61, 62 each having a pair of linear portions 61a, 62a were provided in both of the pair of half members 30, 40, but the present invention is not limited to this. As shown in Fig. 8, at least one of the pair of half members 30, 40 (in this example, only half member 30) may be provided with a notch 61 each having a pair of linear portions 61a. This also makes it possible to prevent relative rotation of the inner pouch 2 with respect to the outer package 3 when an opening torque is applied around the axis of the axial portion 70 of the spout 10, and to prevent the pair of half members 30, 40 that constitute the outer package 3 from opening in the direction of being pulled apart.

[0063] (Alternative embodiment 3) FIG. 9 is an explanatory diagram of Alternative Embodiment 3. FIG. 9(a) is a diagram illustrating an example in which the engagement hole 60 has a hexagonal shape. FIG. 9(b) is a diagram illustrating an example in which the engagement hole 60 has a substantially rounded rectangular shape. In the above embodiment, the engagement hole 60 has a rectangular shape. However, the shape is not limited to this. As long as the engagement hole 60 has a pair of linear portions 61a, 62a, the shape may be a polygon with five or more sides (a hexagon in this example) as shown in FIG. 9(a) , or an oval shape (a substantially rounded rectangular shape in this example) in which both ends of the pair of linear portions 61a, 62a are formed in an arc shape as shown in FIG. 9(b) . Even in the example illustrated in FIGS. 9(a) and 9(b), when an opening torque is applied around the axis of the shaft portion 70 of the spout 10, the inner pouch 2 can be prevented from rotating relative to the outer package 3, and the pair of half members 30, 40 constituting the outer package 3 can be prevented from opening in the direction of separation. [Industrial Applicability]

[0064] The liquid storage container of the present invention can be used to store, for example, alcoholic beverages (sake, shochu, wine, etc.), soft drinks, fruit juice, coffee, tea, water, dairy drinks, cooking oil, liquid seasonings (soy sauce, mirin, vinegar, etc.), etc. [Explanation of symbols]

[0065] 1 Liquid storage container 2 Inner bag 3. Exterior body 3a Heaven 3b Torso 10 spout 30 Half-member 32 One side first insertion part (locked part) 33 Second notch on one side (locked part) 34 First insertion piece on one side (locking part) 35 Second insertion piece on one side (locking part) 40 Half-member 42 Other side first insertion part (locked part) 43 Second notch on other side (locked part) 44 Other side first insertion piece (locking part) 45 Second insertion piece on the other side (locking part) 61,62 Notch 61a Straight section 62a Straight section 65,66 Contact part 70 Shaft 71,72 Flange 77 Overhang 78 Protrusion 80 Overhang 100 sheets

Claims

1. an inner bag body in which contents are stored; an outer body attached to the inner bag body; A liquid storage container comprising: The inner bag body has a spout having a shaft-shaped portion formed therein, The outer casing is a molded body made from paper and / or pulp, and is a liquid storage container consisting of a pair of half-members that, when combined to sandwich the axial portion from the radial direction, form a cylindrical body portion and a flat top portion that engages with the axial portion.

2. the pair of half members can be separated from each other at a joint between the pair of half members, a notch having a pair of linear portions extending in a direction in which the half members are pulled apart is provided in a portion constituting the top portion of at least one of the pair of half members; 2. The liquid container according to claim 1, wherein the spout has a pair of contact portions that can contact the ends of the pair of linear portions in the separating direction.

3. 2. The liquid container according to claim 1, wherein the exterior body does not have a neck portion that is narrowed to cover the shaft portion.

4. 4. The liquid storage container according to claim 1, wherein the spout has a protruding portion that covers at least a part of the joint between the pair of half members from the outside and / or the inside of the exterior body.

5. 4. The liquid container according to claim 1, wherein the spout has a pair of flanges that sandwich the top portion.

6. 6. The liquid container according to claim 5, wherein one of the pair of flanges is provided with a protruding portion that protrudes toward the other flange.

7. A liquid storage container as described in any one of claims 1 to 3, wherein the outer body is attached to the inner bag body by engaging a locking portion and / or a locked portion formed on the side edge of one of the pair of half members with a locking portion and / or a locking portion formed on the side edge of the other half member.

8. 4. The liquid storage container according to claim 1, wherein a sheet is wrapped around or attached to the body portion.

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