JP2021014289A - Exterior box for bag-in-box and bag-in-box - Google Patents

Abstract

To provide an exterior box for a bag-in-box which can reduce the amount of leftover content filled in an inner bag.SOLUTION: An exterior box 3 for a bag-in-box 1 includes: a trunk part 3W including a pair of first side walls 20 and a pair of second side walls 21; and a pair of first flaps 22 continuously provided at one end part of the pair of first side walls 20. The pair of first flaps 22 includes: a pair of first inner wall parts 30 facing inner surfaces of the pair of first side walls 20; a pair of first lid parts 31 extended from tip parts of the pair of first inner wall parts 30; and a pair of support parts 32 extended toward one side in the axial direction from tip parts of the pair of first lid parts 31. In a state of being installed on an installment surface G, the pair of first lid parts 31 inclines downward toward the front from the back, and forms an inclined bottom surface part 31S for supporting an inner bag 2 at a position being separated upward from the installment surface G. A take-out part 28 is provided above the inclined bottom surface part 31S, and tips of the pair of support parts 32 come into contact with the installment surface G.SELECTED DRAWING: Figure 7

Description

The present invention relates to an outer box and a bag-in-box for a bag-in-box that stores an inner bag.

Patent Document 1 discloses a bag-in-box including an inner bag with a spout filled with contents and an outer box for storing the inner bag. The outer box was constructed by bending a blank consisting of a bottom, a lid, and a side plate. The lid portion had a spout outlet portion, and the side plate formed the body portion. The outer box has an inclined member that is located between the horizontal surface and the body when the entire bag-in-box is placed on the horizontal surface so that the spout outlet portion lies sideways, and is inclined toward the lid portion. It was. In this bag-in-box, by providing an inclined member, the unfilled contents of the inner bag are reduced.

JP-A-2017-1728

However, in the bag-in-box described above, there is a risk that the inclined side plate may bend or break due to the weight of the inner bag (contents) and become substantially parallel to the horizontal plane. Then, since the inner bag cannot be tilted, many contents may remain in the inner bag.

Further, since the spout of the inner bag exposed from the spout removal portion is arranged near the horizontal plane, the spout may come into contact with the horizontal plane. In addition, there was no space between the spout and the horizontal surface to place a container for pouring the contents. Therefore, it is necessary to further arrange an installation table or the like on the horizontal surface, arrange a bag-in-box on the installation table or the like, and separate the spout from the horizontal surface.

In order to solve the above problems, the present invention provides an outer box and a bag-in-box for a bag-in-box that can reduce the amount of leftovers of the contents filled in the inner bag.

In order to achieve the above object, the present invention is an outer box for a bag-in-box for storing an inner bag having a spout, which intersects a pair of first side walls facing in the first direction in the first direction. A tubular portion including a pair of second side walls facing in the second direction and one end of the pair of the first side walls, which are connected to one end in the axial direction of the body. The pair of first flaps are folded back inside the body portion, and the pair of first inner wall portions facing the inner surface of the first side wall portion and the pair of the first flap portions are provided with a pair of first flaps for closing the lid. A pair of first lid portions extending from the tip portions of the first inner wall portion of the above to close each other and closing the opening, and a pair of first lid portions extending in one axial direction from the tip portions of the first lid portion. The second side wall in one of the second directions includes a pair of supporting portions that are extended and overlap each other, and has a take-out portion for exposing the spout, and is paired with the pair of the first inner wall portions. The boundary line with the first lid portion is inclined in one axial direction from the other in the second direction toward one side, and the pair is installed with one end in the axial direction of the body portion in contact with the installation surface. The first lid portion is inclined downward from the other in the second direction toward one side, and forms an inclined bottom surface portion that supports the inner bag at a position separated upward from the installation surface, and the taking-out portion is formed. The pair of support portions are provided above the inclined bottom surface portion, and the tip thereof is brought into contact with the installation surface to support the inclined bottom surface portion.

In this case, the support portion is further provided with a plurality of closing pieces that are connected to the other ends of the pair of the first side wall and the pair of the second side walls and close the other opening in the axial direction of the body portion. In a posture in which the pair of the support portions are directed upward, the pair of the support portions preferably function as handles to be gripped during transportation.

In this case, a pair of engaging pieces are projected from the tips of the pair of the first lid portions, and the engaging pieces of one of the first lid portions are of the other first lid portion. It is preferable that the engaging piece of the other first lid portion overlaps the back side and penetrates the gripping hole of the first lid portion and overlaps the front side.

In this case, a pair of second flaps connected to one end of the pair of the second side walls is further provided, and the pair of the second flaps are folded back inside the body portion to form a pair of the second side walls. The second lid portion includes a pair of second inner wall portions facing the inner surface and a pair of second lid portions extending from the tip portions of the pair of the second inner wall portions so as to intersect each other. Is laminated on the pair of the first lid portions that close the opening while avoiding the pair of the support portions, and the other second lid portion is one of the second lid portions while avoiding the pair of the support portions. A lock hole is formed in one of the second inner wall portions at a position along the boundary with the second lid portion, and the lock is formed in the tip portion of the other second lid portion. It is preferable that a lock protrusion that can be engaged with the hole is provided.

In this case, it is preferable that one of the second lid portions is divided into two so as to sandwich the pair of the support portions, and the other second lid portion has a slit for penetrating the pair of the support portions. ..

In order to achieve the above object, the bag-in-box according to the present invention includes an inner bag having a spout, and an outer box for the bag-in-box according to any one of the above, which houses the inner bag. It was.

According to the present invention, it is possible to reduce the amount of unpoured contents filled in the inner bag.

It is a perspective view which shows the bag-in-box which concerns on one Embodiment of this invention. It is a side sectional view which shows the bag-in-box which concerns on one Embodiment of this invention. It is a top view which shows the blank of the outer box for the bag-in-box which concerns on one Embodiment of this invention. It is a perspective view explaining the process of assembling the bag-in-box (outer box) which concerns on one Embodiment of this invention. It is a perspective view explaining the usage of the bag-in-box which concerns on one Embodiment of this invention. It is a front sectional view which shows the time of use of the bag-in-box which concerns on one Embodiment of this invention. It is a side sectional view which shows the use of the bag-in-box which concerns on one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawing, "Fr" indicates "front", "Rr" indicates "rear", "L" indicates "left", "R" indicates "right", and "U" indicates "U". "Upper" and "D" indicate "lower". The front-rear direction (second direction) is orthogonal to the left-right direction (first direction), and the up-down direction (axial direction) is orthogonal to the front-rear direction and the left-right direction. Although terms indicating directions and positions are used in the present specification, these terms are used for convenience of explanation and do not limit the technical scope of the present invention.

[Overview of bag-in-box]
The configuration of the bag-in-box 1 will be described with reference to FIGS. 1 to 3. FIG. 1 is a perspective view showing a bag-in-box 1. FIG. 2 is a side sectional view showing the bag-in-box 1. FIG. 3 is a plan view showing a blank 5 of the outer box 3 for the bag-in-box 1.

As shown in FIG. 1, the bag-in-box 1 is formed in a substantially rectangular parallelepiped shape. As shown in FIG. 2, the bag-in-box 1 includes an inner bag 2 containing a content 100 such as a liquid or powder, and an outer box 3 containing the inner bag 2.

<Inner bag>
The inner bag 2 is, for example, a bag formed of a synthetic resin film (or a composite film in which a synthetic resin layer and a metal film are laminated). A pouring portion 10 is fixed to the inner bag 2, and the pouring portion 10 has a pouring outlet 11 for allowing the content 100 to flow out to the outside. Further, the pouring portion 10 is provided with a rotary opening / closing plug 12 that opens / closes the pouring outlet 11. Two flange portions 13 are provided at the root portion of the injection portion 10 with a gap into which the corrugated cardboard sheet can be fitted.

<Outer box>
The outer box 3 for the bag-in-box 1 is formed by assembling the blank 5 shown in FIG. The blank 5 is formed of, for example, a double-sided corrugated cardboard sheet made of paper in which a front liner 9B and a back liner 9C (see FIG. 2) are attached to the front and back surfaces of a wavy inner shin 9A. The blank 5 is formed by punching, for example, a single corrugated cardboard sheet with a die. Note that FIG. 2 shows the front liner 9B side (outer surface side of the outer box 3). In the present specification, the direction parallel to the corrugated cardboard inner shin 9A is referred to as the "step direction", and the direction orthogonal to the step direction (middle shin 9A) is referred to as the "flow direction". “X” shown in the drawing indicates “step direction”, and “Y” indicates “flow direction”. Further, in the present specification, the terms indicating the direction and the position refer to the direction and the position in the assembled state (assembled state) of the outer box 3.

[blank]
As shown in FIG. 3, the blank 5 includes a pair of first side walls 20, a pair of second side walls 21, a pair of first flaps 22, a pair of second flaps 23, and a first block piece 24. A pair of a second obstruction piece 25 and a third obstruction piece 26 are provided.

<1st side wall, 2nd side wall>
The pair of first side walls 20 and the pair of second side walls 21 are alternately connected from one side to the other in the flow direction via the first folding curve L1. The first side wall 20 and the second side wall 21 are formed in a substantially rectangular shape. Specifically, the first side wall 20 is formed in a substantially rectangular shape slightly longer in the flow direction than the second side wall 21. At one end of the first side wall 20 in the flow direction, a joint piece 27 is continuously provided via the first folding curve L1.

The second side wall 21 provided between the pair of first side walls 20 is formed with a take-out portion 28 for exposing the discharge portion 10 (pouring port 11) of the inner bag 2 housed in the outer box 3. There is. The take-out portion 28 is formed at the center of the second side wall 21 in the flow direction on one side (second flap 23 side) of the second side wall 21 in the step direction. The take-out portion 28 has a take-out hole 28A partitioned by a substantially hexagonal cut, and a pair of take-out pieces 28B provided adjacent to the other side of the take-out hole 28A in the step direction. The take-out hole 28A is opened by cutting a part of the second side wall 21 along the cut. The pair of take-out pieces 28B are partitioned by three cuts extending from the take-out hole 28A to the other in the step direction. The pair of take-out pieces 28B are connected to the second side wall 21 via the pair of take-out fold curves 28C.

<1st flap>
The pair of first flaps 22 are continuously provided at one end in the step direction of the pair of first side walls 20. The pair of first flaps 22 are formed substantially line-symmetrically with the second side wall 21 as the axis of symmetry. The pair of first flaps 22 includes a first inner wall portion 30, a first lid portion 31, and a support portion 32, respectively.

(1st inner wall)
The pair of first inner wall portions 30 are connected to the pair of first side walls 20 via the second folding curve L2. The tips of the pair of first inner wall portions 30 (first reverse folding line L11 described later) are inclined toward the base end side (direction approaching the second folding curve L2) from both outer ends in the flow direction toward each other. ing. Therefore, in the pair of first inner wall portions 30, the heights on both inner sides in the flow direction (dimensions in the step direction) are set lower (shorter) than the heights on both outer sides in the flow direction, and the first inner wall portions 30 are substantially bases. It is formed in a shape.

(1st lid)
The pair of first lid portions 31 are connected to the tip portions of the pair of first inner wall portions 30 via the first reverse polygonal line L11. The first lid portion 31 is formed in a substantially rectangular shape. Both outer ends of the pair of first lids 31 in the flow direction form substantially right angles to the inclined first reverse polygonal line L11. That is, both outer ends of the pair of first lids 31 in the flow direction are inclined in a direction approaching each other from the base end toward the tip end. Both inner ends of the pair of first lids 31 in the flow direction are formed substantially parallel to both inner ends of the pair of first inner wall portions 30 in the flow direction (first folding curve L1). Therefore, both inner ends of the pair of first lids 31 in the flow direction form an acute angle with respect to the inclined first reverse polygonal line L11.

(Support part)
The pair of support portions 32 are connected to the tip portions of the pair of first lid portions 31 via the support folding curve L12. The support portion 32 is formed in a substantially rectangular shape narrower in the flow direction than the first lid portion 31. A gripping hole 32A is formed on the base end side of the support portion 32, and the support portion 32 is formed in a (inverted) substantially U shape. The tips of the pair of support portions 32 are inclined toward the base end side from both outer sides in the flow direction toward the inside, and the inclination angle (angle with respect to the second folding curve L2) is larger than the inclination angle of the first reverse folding line L11. Is also set large. Therefore, in the pair of support portions 32, the heights on both inner sides in the flow direction (dimensions in the step direction) are set lower (shorter) than the heights on both outer sides in the flow direction (dimensions in the step direction).

Further, a pair of engaging pieces 31A are projected from the tip portions of the pair of first inner wall portions 30 described above so as to fill a part of the gripping holes 32A of the pair of support portions 32. The support folding curve L12 is not formed on the pair of engaging pieces 31A. Further, although a substantially triangular notch is recessed in the tip end portion of the engaging piece 31A on the side of the joint piece 27, this notch may be omitted (deleted).

<2nd flap>
The pair of second flaps 23 are continuously provided at the other end of the pair of second side walls 21 in the step direction. The pair of second flaps 23 are formed in a substantially rectangular shape having substantially the same size. The pair of second flaps 23 includes a second inner wall portion 33 and a second lid portion 34, respectively. Since the pair of second flaps 23 have different shapes from each other, in the following description, the second flaps 23 connected to the second side wall 21 having the take-out portion 28 and the configuration thereof are referred to as "(1). ) ”Is added, and the code“ (2) ”is added to the other second flap 23 and its configuration, and in the description common to both, only arithmetic numbers are used as codes.

(2nd inner wall)
The pair of second inner wall portions 33 are connected to the pair of second side walls 21 via two third folding curves L3. The two third folding curves L3 are formed in parallel with each other in close proximity to each other, and a frame portion 33A is formed between the two third folding curves L3. The frame portion 33A is formed in a substantially rectangular shape slightly longer in the flow direction than the second inner wall portion 33. The second inner wall portion 33 is formed in a substantially rectangular shape, and the dimension of the second inner wall portion 33 (1) in the step direction is substantially the same as the portion where the height of the first inner wall portion 30 is low, and the second inner wall portion 30 is formed. The dimension of the portion 33 (2) in the step direction is substantially the same as the portion where the height of the first inner wall portion 30 is high.

(2nd lid)
The pair of second lid portions 34 are continuously provided at the tip portions of the pair of second inner wall portions 33 via the second reverse folding line L13. The second inner wall portion 33 is formed in a substantially rectangular shape. The dimension of the second lid portion 34 (1) in the step direction is set to be slightly shorter than the dimension of the first side wall 20 in the flow direction. Since the second inner wall portion 33 (2) is longer in the step direction than the second inner wall portion 33 (1), the second lid portion 34 (2) is formed shorter in the step direction than the second lid portion 34 (1). ing.

A slit 35 is formed along the step direction at the center of the second lid portion 34 (1) in the flow direction. The slit 35 extends from the vicinity of the tip of the second lid portion 34 (1) to the vicinity of the frame portion 33A (1) beyond the second reverse polygonal line L13 (1). A lock convex portion 36 is provided so as to project from the central portion of the tip portion of the second lid portion 34 (1) in the flow direction.

The second flap 23 (2) is bisected by a cutting line CL extending from the tip of the second lid portion 34 (2) to the frame portion 33A (2) along the step direction. In the present specification, the portion in which the second inner wall portion 33 (2) and the frame portion 33A (2) are divided into two is referred to as a pair of second inner wall pieces 37, and the second lid portion 34 (2) is two. The divided portions will be referred to as a pair of second lid pieces 38.

The base end sides of the pair of second inner wall pieces 37 are abutted via the cutting line CL. Further, the intermediate portions of the pair of second lid pieces 38 in the step direction are abutted with each other via the cutting line CL. In this specification, the abutting portion of the pair of second lid pieces 38 at the intermediate portion in the step direction is referred to as a pair of engaging convex portions 38A. Other than these abutting portions, that is, the portion from the tip end side of the pair of second inner wall pieces 37 to the proximal end side of the pair of second lid pieces 38, and the tip side of the pair of second lid pieces 38, respectively. , A gap S is formed along the cut portion.

Further, a lock hole 39 is formed in the second inner wall portion 33 (2) at a position along the boundary with the second lid portion 34. The lock hole 39 is formed by a pair of cut lines extending in parallel with the second reverse folding line L13 (2) to the gap S after projecting from the second reverse folding line L13 (2) toward the pair of second inner wall pieces 37. Has been done.

<First block piece>
The first block piece 24 is continuously provided at the other end in the step direction of the first side wall 20 sandwiched between the pair of second side walls 21 via the fourth folding curve L4. The first block piece 24 is formed in a substantially rectangular shape, and its step direction dimension (extension dimension) is set to be longer than half of the flow direction dimension of the second side wall 21. A substantially rectangular fitting recess 24A is recessed in the center of the tip of the first blocking piece 24 in the flow direction.

<Second block piece>
The pair of second closing pieces 25 are continuously provided at the other end of the pair of second side walls 21 in the step direction via the fourth folding curve L4. The second block piece 25 has a substantially trapezoidal notch on the side of the first block piece 24, and has a complicated shape having a projecting piece 25A protruding relatively to the side opposite to the first block piece 24. ing. The second obstruction piece 25 connected to the second obstruction piece 25 having the take-out portion 28 is formed shorter than the other second obstruction piece 25 in the step direction. The maximum dimension of the other second block piece 25 in the step direction is substantially the same as the extension dimension of the first block piece 24.

<Third block piece>
The third closing piece 26 is continuously provided at the other end in the step direction of the first side wall 20 adjacent to the joint piece 27 via the fourth folding curve L4. The third blocking piece 26 is formed in a substantially trapezoidal shape, and the dimension (extended dimension) in the step direction is substantially the same as the extending dimension of the first blocking piece 24. A fitting convex portion 26A having a shape complementary to the fitting concave portion 24A of the first closing piece 24 is projected from the tip portion of the third closing piece 26.

The first to fourth fold curves L1 to L4, the support fold curve L12, and the take-out fold curve 28C are general-purpose ruled lines obtained by crushing a corrugated cardboard sheet linearly in the thickness direction from the back liner 9C side. The first and second reverse folding lines L11 and L13 are lead ruled lines in which a plurality of cuts are formed at predetermined intervals on the general-purpose ruled line. These first folding curves L1 and the like are not limited to general-purpose ruled lines and lead ruled lines, and may be any line such as a sewing machine blade line for bending a corrugated cardboard sheet.

[Assembly of bag-in-box]
Next, the procedure for assembling the bag-in-box 1 will be described with reference to FIGS. 1, 2 and 4. FIG. 4 is a perspective view illustrating a process of assembling the bag-in-box 1 (outer box 3). As an initial state before assembly, the first side wall 20 and the second side wall 21 located on both outer sides in the flow direction of the blank 5 are bent along the first folding curve L1, and the joint piece 27 is the second side wall 21. It is assumed that the outer box 3 for the bag-in-box is doubly folded so as to be adhered to the inner surface.

First, the operator bends the pair of the first side walls 20 and the pair of the second side walls 21 at substantially right angles along the first folding curve L1. The pair of first side walls 20 face each other in the left-right direction (first direction), and the pair of second side walls 21 face each other in the front-rear direction (second direction). Then, a substantially square tubular body portion 3W is formed (see FIG. 4). The second side wall 21 having the take-out portion 28 is the front surface of the body portion 3W.

Subsequently, the operator bends the first block piece 24 inward along the fourth folding curve L4, and then bends the pair of second block pieces 25 inward along the fourth folding curve L4. Next, the operator bends the third closing piece 26 inward along the fourth folding curve L4, sandwiches the pair of second closing pieces 25, pushes the first closing piece 24, and fits the fitting convex portion 26A. It is inserted into the joint recess 24A (see FIG. 5 described later). As a result, the opening 3B of the other body portion 3W in the axial direction (lower in FIGS. 1, 2, and 4) is closed by the first to third closing pieces 24 to 26. The first to third obstruction pieces 24 to 26 form a so-called hell bottom (or American lock) assembling type obstruction surface. Although details will be described later, the closed surface assembled by the first to third closed pieces 24 to 26 is the bottom surface of the bag-in-box 1 during transportation.

Next, the operator inserts the inner bag 2 into the body 3W from the opening 3A on one side of the body 3W in the axial direction (upper in FIGS. 2 and 4). The inner bag 2 is inserted into the body portion 3W with the dispensing portion 10 facing the front surface of the body portion 3W, and the dispensing portion 10 is arranged in the vicinity of the ejection portion 28 (see FIG. 2).

Next, the operator closes one opening 3A in the axial direction of the body portion 3W by the pair of the first flaps 22 and the pair of the second flaps 23. Specifically, as shown in FIG. 4, the operator folds the pair of first inner wall portions 30 inward of the body portion 3W along the second folding curve L2, and the pair of first lid portions 31 is first. Reverse fold along the reverse fold line L11 (fold the front liner 9B so as to face inward), and reverse fold the pair of support portions 32 along the reverse fold curve L12.

Then, the pair of first inner wall portions 30 overlaps the inner surfaces (back liner 9C) of the pair of first side walls 20 to form a double wall (see FIG. 6 described later). The pair of first lid portions 31 are extended so as to approach each other from the tip portions of the pair of first inner wall portions 30, and close the opening 3A (see also FIG. 2). Although details will be described later, the pair of first lid portions 31 that close the opening 3A is also referred to as a bottom surface of the bag-in-box 1 during use (when the content 100 is poured out) (hereinafter, also referred to as “inclined bottom surface portion 31S”). .). The pair of support portions 32 extend from the tip portions of the pair of first lid portions 31 in one axial direction and overlap each other so as to match the pair of gripping holes 32A. The tips of the pair of support portions 32 are located at substantially the same height as one end in the axial direction of the body portion 3W (second folding curve L2 and third folding curve L3) (see FIG. 2). When the pair of support portions 32 are reversely folded, the engaging piece 31A of the pair of first lid portions 31 comes out of the gripping hole 32A. The engaging piece 31A of one first lid 31 overlaps the back side of the other first lid 31 (see FIG. 2), and the engaging piece 31A of the other first lid 31 is one first lid. It penetrates the gripping hole 32A of the portion 31 and overlaps the front side (see FIG. 4).

As shown in FIG. 4, the first inner wall portion 30, the first lid portion 31, and the support portion 32 are bent in a substantially U-shape (U-shape) when viewed from the front and fall into the inside of the body portion 3W. There is. The pair of first flaps 22 as a whole is bent in a substantially E shape when viewed from the front and fitted into the inside of the body portion 3W. The first reverse folding line L11 as a boundary line between the pair of first inner wall portions 30 and the pair of first lid portions 31 is axially one (upper in FIG. 4) from the rear to the front (one from the other in the second direction). ), The pair of first lid portions 31 (inclined bottom surface portions 31S) that closed the opening 3A are also inclined in the same manner as the first reverse folding line L11 (see FIG. 2).

Next, as shown in FIGS. 2 and 4, the operator puts a pair of second inner wall pieces 37 (frame portion 33A (2) and second inner wall portion 33 (2)) into two third folding curves L3. Fold back inside the body portion 3W along (2), and reverse fold the pair of second lid pieces 38 (second lid portion 34 (2)) along the second reverse folding line L13 (2). Since the second inner wall portion 33 (2) and the second lid portion 34 (2) are divided into two and have a gap S in the cut portion, they come into contact with the pair of support portions 32 in the standing posture. It can be folded while.

Then, as shown in FIG. 2, the second inner wall portion 33 (2) (pair of second inner wall pieces 37) faces the inner surface of the second side wall 21 with a slight gap (or lightly in contact with each other). , Consists of a double wall. The second lid portion 34 (2) (pair of second lid pieces 38) extends forward from the tip of the second inner wall portion 33 (2) (pair of second inner wall pieces 37), and the pair of support portions 32. It is laminated on the pair of first lid portions 31 that close the opening 3A while avoiding the above. The pair of second lid pieces 38 sandwich the pair of support portions 32, and the pair of engaging convex portions 38A are fitted into the gripping holes 32A of the pair of support portions 32 and are butted against each other (see FIG. 1). When the pair of second lid pieces 38 are reversely folded, the lock hole 39 of the second inner wall portion 33 (2) opens (see FIGS. 1 and 2).

Next, as shown in FIGS. 2 and 4, the operator moves the frame portion 33A (1) and the second inner wall portion 33 (1) along the two third polygonal curves L3 (1) to the body portion 3W. The second lid portion 34 (1) is folded back at the second reverse folding line L13 (1). Since the pair of support portions 32 in the upright posture penetrate the slit 35 of the second lid portion 34 (1), the second inner wall portion 33 (1) and the second lid portion 34 (1) can be bent.

Then, as shown in FIG. 2, the second inner wall portion 33 (1) faces the inner surface of the second side wall 21 with a slight gap (or lightly in contact with each other) to form a double wall. The second lid portion 34 (1) extends rearward from the tip of the second inner wall portion 33 (1) and is laminated on the second lid portion 34 (2) while avoiding the pair of support portions 32. Further, the lock convex portion 36 of the second lid portion 34 (1) engages with the lock hole 39 opened in the second inner wall portion 33 (2) (see FIGS. 1 and 2). As a result, the second lid portion 34 (1) is not easily deployed, and the pair of second lid portions 34 are extended so as to intersect each other from the tip portions of the pair of second inner wall portions 33. Is retained.

As a result, the assembly of the bag-in-box 1 is completed (see FIG. 1).

[Transportation of bag-in-box]
As shown in FIGS. 1 and 2, in a posture in which the pair of support portions 32 are directed upward, the pair of support portions 32 function as handles to be gripped (by the user) during transportation. That is, the user puts his / her hand in the pair of gripping holes 32A, grips the pair of support portions 32 stacked in an upright posture, and carries the bag-in-box 1. When the bag-in-box 1 is transported, the closing surface assembled by the first to third closing pieces 24 to 26 becomes the bottom surface that supports the inner bag 2.

According to the bag-in-box 1, the user can firmly grasp the pair of support portions 32, so that the bag-in-box 1 can be easily carried. Further, the pair of first inner wall portions 30 are folded back inside the body portion 3W to form a double wall with the pair of first side walls 20, and the pair of first lid portions 31 are pressed inside the body portion 3W. And said. According to this configuration, when the user grips the pair of support portions 32 and lifts the bag-in-box 1, the pair of first lid portions 31 can be suppressed from bending. As a result, it is possible to suppress the vertical swing of the pair of support portions 32 during transportation, and a stable handle can be configured.

[How to use the bag-in-box]
Next, with reference to FIGS. 5 to 7, a method of using the bag-in-box 1, specifically, a method of pouring the content 100 from the spout 11 into the external container 101 will be described. FIG. 5 is a perspective view illustrating how to use the bag-in-box 1. FIG. 6 is a front sectional view showing the use of the bag-in-box 1. FIG. 7 is a side sectional view showing the use of the bag-in-box 1.

As shown in FIGS. 5 to 7, when the bag-in-box 1 is used, the user is in a posture in which the pair of support portions 32 are directed downward, and one end in the axial direction of the body portion 3W (at the second folding curve L2). The fold portion and the frame portion 33A) are brought into contact with the installation surface G for installation. That is, the bag-in-box 1 is used in an upside-down posture from that during transportation.

Since the pair of first reverse folding lines L11 are inclined with respect to one end in the axial direction (second and third folding curves L2 and L3) of the body portion 3W (see FIG. 3), bag-in as shown in FIG. With the box 1 installed on the installation surface G, the pair of first lid portions 31 form an inclined bottom surface portion 31S inclined downward from the rear to the front (one from the other in the second direction).

Further, as shown in FIGS. 6 and 7, the pair of first lid portions 31 are provided above the installation surface G because they are inside the body portion 3W. Therefore, the inclined bottom surface portion 31S supports the inner bag 2 at a position separated upward from the installation surface G. Further, the pair of support portions 32 support the inclined bottom surface portion 31S with their tips abutting against the installation surface G. Further, the take-out portion 28 formed on the front surface (second side wall 21) of the body portion 3W is provided above the inclined bottom surface portion 31S. As described above, the inclined bottom surface portion 31S is supported by the pair of first inner wall portions 30, the pair of second inner wall portions 33, and the pair of support portions 32 in an inclined posture at a position upward away from the installation surface G. ing.

Next, the user pushes the portion for partitioning the take-out hole 28A with a finger to open the take-out hole 28A. Further, the user inserts a finger into the take-out hole 28A, takes out the pair of take-out pieces 28B and bends them outward along the take-out curve 28C, and bends the pair of take-out pieces 28B from the opening formed by bending the injection portion 10 of the inner bag 2. Pull out. As shown in FIGS. 5 and 7, the user fits the peripheral edge portion of the take-out hole 28A between the two flange portions 13 of the take-out portion 10 to fix the take-out portion 10, and a pair of take-out pieces. Restore 28B. At this time, the user fixes the pouring portion 10 with the pouring outlet 11 facing downward. As a result, the dispensing portion 10 is exposed to the front surface (second side wall 21) of the body portion 3W.

Next, as shown in FIG. 7, the user arranges the container 101 below the spout 11, opens the opening / closing plug 12, and pours the contents into the container 101 from the spout 11.

When the bag-in-box 1 (outer box 3) according to the present embodiment described above is placed on the installation surface G with the pair of support portions 32 facing downward, the inclined bottom surface portion 31S moves from the rear to the front. The tips of the pair of support portions 32, which had a double-walled structure and were in an upright posture, came into contact with the installation surface G. According to this configuration, the weight of the inner bag 2 filled with the contents 100 can be supported by the pair of support portions 32 in addition to the pair of first inner wall portions 30 and the pair of second inner wall portions 33. .. Since the pair of support portions 32 support the vicinity of the center of the inclined bottom surface portion 31S which is most easily bent, the downward slope of the inclined bottom surface portion 31S can be maintained. As a result, the content 100 filled in the inner bag 2 flows out from the spout 11 due to the downward gradient of the inclined bottom surface portion 31S, so that the unpoured portion of the content 100 filled in the inner bag 2 can be reduced.

Further, in the bag-in-box 1 (outer box 3) according to the present embodiment, the inclined bottom surface portion 31S is provided so as to be separated upward from the installation surface G, and the take-out portion 28 is provided above the inclined bottom surface portion 31S. It was. According to this configuration, the spout 11 exposed from the take-out portion 28 is prevented from coming into contact with the installation surface G. Further, a space for arranging the container 101 can be formed between the spout 11 and the installation surface G. As a result, it is not necessary to further arrange the installation stand on the installation surface G in order to prevent the spout 11 from coming into contact with the installation surface G, and the installation location of the bag-in-box 1 can be freely selected.

Further, according to the outer box 3 according to the present embodiment, one engaging piece 31A overlaps the other first lid portion 31 on the back side, and the other engaging piece 31A is placed on the one first lid portion 31 on the front side. Since they overlap, the pair of first lids 31 can be engaged with each other (see FIGS. 2 and 4). As a result, it is possible to effectively suppress the vertical swing of the pair of support portions 32 during transportation.

Further, in the outer box 3 according to the present embodiment, the rear second lid portion 34 (2) is laminated on the pair of first lid portions 31, and the front second lid portion 34 (1) is the rear second lid portion 34 (1). The second lid portions 34 are laminated on the portions 34 (2) and locked to each other (see FIGS. 1 and 2). According to this configuration, the pair of support portions 32 can be firmly fixed.

Further, according to the outer box 3 according to the present embodiment, since the rear second lid portion 34 (2) and the like are divided into two, the rear second lid portion 34 (2) is divided into a pair of first lids. The work of laminating on the portion 31 can be smoothly performed. Further, by passing the pair of support portions 32 through the slit 35 of the front second lid portion 34 (1), the front second lid portion 34 (1) is laminated on the rear second lid portion 34 (2). be able to. In this way, the work of closing the pair of second lid portions 34 can be easily performed while avoiding interference with the pair of support portions 32.

In the outer box 3 according to the present embodiment, the pair of first flaps 22 is overlapped with the pair of second flaps 23, but the present invention is not limited to this. One or both of the pair of second flaps 23 may be omitted (deleted) (not shown).

Further, in the outer box 3 according to the present embodiment, the pair of support portions 32 are handles that are gripped when being transported, but the present invention is not limited to this, and the gripping holes 32A may be omitted (FIG. FIG. Not shown).

Further, in the outer box 3 according to the present embodiment, the tips of the pair of support portions 32 are located at substantially the same height as one end in the axial direction (second folding curve L2 and third folding curve L3) of the body portion 3W. However (see FIG. 2), the present invention is not limited to this. For example, the tips of the pair of support portions 32 may be located slightly below (for example, about 5 mm) below (inside in the axial direction) from one end in the axial direction of the body portion 3W (not shown). In this case, when the bag-in-box 1 is used, the inclined bottom surface portion 31S is slightly lowered and supported by the pair of support portions 32. Alternatively, for example, the tips of the pair of support portions 32 may be located above (axially outside) the one end in the axial direction of the body portion 3W (not shown). In this case, when the bag-in-box 1 is used, the height of the pair of support portions 32 is adjusted by bending or bending, and the inclined bottom surface portion 31S is supported by the pair of curved or bent support portions 32. ..

Further, in the outer box 3 according to the present embodiment, the entire rear second flap 23 (2) (second inner wall portion 33 (2) and second lid portion 34 (2)) is divided into two, and the front second flap 23 (2) is divided into two parts. 2 The inner wall portion 33 (1) and the second lid portion 34 (1) were formed by one piece, but the present invention is not limited to this, and the front second inner wall portion 33 (1) and the second lid portion 34 (1) are not limited to this. May be divided into two, and the rear second inner wall portion 33 (2) and the second lid portion 34 (2) may be formed by one sheet (not shown). Further, in the outer box 3 according to the present embodiment, the entire second flap 23 (2) is divided into two so that the second inner wall portion 33 does not interfere with the support portion 32 at the time of folding back. Not limited to. Of the entire second flap 23 (2), at least the second lid portion 34 (2) may be divided into two parts. Further, in the outer box 3 according to the present embodiment, the slit 35 is formed from the second lid portion 34 (1) to the second inner wall portion 33 (so that the second inner wall portion 33 (1) does not interfere with the support portion 32 when folded back. Although it has been extended to 1), the present invention is not limited to this. The slit 35 may be formed at least in the second lid portion 34 (1).

Further, in the outer box 3 according to the present embodiment, the first inner wall portion 30 overlaps the inner surface of the first side wall 20, but the present invention is not limited to this. For example, similarly to the second inner wall portion 33, the first inner wall portion 30 is connected to the first side wall 20 via a frame portion (not shown), and the first inner wall portion 30 is slightly attached to the inner surface of the first side wall 20. You may face each other with a gap between them. Further, the second inner wall portion 33 was opposed to the inner surface of the second side wall 21 with a gap in between, but similarly to the first inner wall portion 30, even if the second inner wall portion 33 overlaps the inner surface of the second side wall 21. Good (may contact).

Further, in the outer box 3 according to the present embodiment, the bottom surface of the bag-in-box 1 during transportation is the hell bottom in which the first to third closed pieces 24 to 26 are assembled, but the present invention is not limited to this. For example, as in the so-called A-type box, a pair of outer flaps may be fixed to the surface of the pair of inner flaps to close the opening 3B of the body portion 3W (not shown).

Further, although the outer box 3 according to the present embodiment is formed in a substantially rectangular parallelepiped, for example, the corners of the four surfaces of the rectangular parallelepiped may be chamfered to form a substantially octagonal columnar shape (not shown).

Further, the outer box 3 according to the present embodiment is formed of a double-sided corrugated cardboard sheet made of paper, but the present invention is not limited thereto. For example, the corrugated cardboard sheet may be a single-sided corrugated cardboard sheet in which a liner is attached to one side of Nakashin 9A, or a double-sided corrugated cardboard sheet in which a single-sided corrugated cardboard sheet and a double-sided corrugated cardboard sheet are laminated. Further, for example, the outer box 3 may be formed of thick paper, a resin plate, or the like instead of the corrugated cardboard sheet made of paper.

The description of the above embodiment shows one aspect of the outer box for the bag-in-box and the bag-in-box according to the present invention, and the technical scope of the present invention is not limited to the above-described embodiment. Absent.

1 Bag-in-box 2 Inner bag 3 Outer box 3A Opening 3B Opening 3W Body 11 Outlet 20 1st side wall 21 2nd side wall 22 1st flap 23 2nd flap 24 1st block piece 25 2nd block piece 26th 3 Closure piece 28 Extraction part 30 First inner wall part 31 First lid part 31A Engagement piece 31S Inclined bottom part 32 Support part 32A Gripping hole 33 Second inner wall part 34 Second lid part 35 Slit 36 Lock convex part 39 Lock hole G Installation surface L11 1st reverse folding line (boundary line)

Claims (6)

An outer box (3) for a bag-in-box (1) that stores an inner bag (2) having a spout (11).
A body portion (3W) formed in a tubular shape including a pair of first side walls (20) facing the first direction and a pair of second side walls (21) facing the second direction intersecting the first direction. When,
A pair of first flaps (22), which are connected to one end of the first side wall and close one axial opening (3A) of the body, are provided.
The pair of the first flaps
A pair of first inner wall portions (30) that are folded back inside the body portion and face the inner surfaces of the first side wall portion.
A pair of first lid portions (31) extending from the tips of the pair of the first inner wall portions so as to approach each other and closing the opening.
A pair of support portions (32) extending from the tip end portions of the first lid portion toward one axial direction and overlapping each other are included.
The second side wall on one side in the second direction has a take-out portion (28) for exposing the spout.
The boundary line (L11) between the pair of the first inner wall portions and the pair of the first lid portions is inclined in one axial direction from the other in the second direction.
In a state where one end of the body portion in the axial direction is in contact with the installation surface (G), the pair of the first lid portions are inclined downward from the other in the second direction toward one side, and from the installation surface. An inclined bottom surface portion (31S) for supporting the inner bag is formed at a position separated upward, the taking-out portion is provided above the inclined bottom surface portion, and the pair of the supporting portions has the tip thereof. An outer box for a bag-in-box, characterized in that the inclined bottom surface portion is supported in contact with the installation surface. A plurality of closing pieces (24 to 26), which are connected to the other ends of the pair of the first side wall and the pair of the second side walls and close the other opening (3B) in the axial direction of the body portion, are further provided. Prepare,
A grip hole (32A) is formed in the support portion.
The outer box for a bag-in-box according to claim 1, wherein the pair of the support portions function as handles to be gripped during transportation in a posture in which the pair of the support portions are directed upward. .. A pair of engaging pieces (31A) are projected from the tips of the pair of the first lid portions.
The engaging piece of one of the first lids overlaps the back side of the other first lid,
The outer box for a bag-in-box according to claim 2, wherein the engaging piece of the other first lid portion penetrates the gripping hole of the first lid portion and overlaps the front side. .. Further provided with a pair of second flaps (23) connected to one end of the pair of the second side walls.
The pair of the second flaps
A pair of second inner wall portions (33) that are folded back inside the body portion and face the inner surfaces of the pair of the second side walls.
Includes a pair of second lids (34) extending from the tips of the pair of second inner walls so as to intersect each other.
One of the second lids is laminated on the pair of first lids that close the opening while avoiding the pair of supports.
The other second lid portion is laminated on one of the second lid portions while avoiding the pair of the support portions.
A lock hole (39) is formed in the second inner wall portion at a position along the boundary with the second lid portion.
The bag-in according to any one of claims 1 to 3, wherein a lock convex portion (36) that can be engaged with the lock hole is projected from the tip end portion of the second lid portion. Exterior box for the box. One of the second lid portions is divided into two so as to sandwich the pair of the support portions.
The outer box for a bag-in-box according to claim 4, wherein the second lid portion has a slit (35) for penetrating the pair of the support portions. An inner bag (2) having a spout (11) and
A bag-in-box comprising the outer box for the bag-in-box according to any one of claims 1 to 5, which houses the inner bag.

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