JP2014019456A - Liquid storage bag and bag-in-box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid storage bag and a bag-in-box that can prevent the occurence of a failure in an expanding operation when a liquid is injected into the liquid storage bag.SOLUTION: A liquid storage bag 1 is accommodated in a box-shaped container, contains a liquid injected thereto, and comprises: a bottom surface part that is arranged at a bottom surface of the box-shaped container; an upper surface part 3 that faces the bottom surface part; a pair of side surface gusset parts 5 which face each other, are connected with the bottom surface part and the upper surface part 3, and are folded between the bottom surface part and the upper surface part 3; and an injection port through which the liquid is injected into the liquid storage bag 1. The side surface gusset part 5 comprises an upper side gusset part 5A that is adjacent to the upper surface part 3 and a lower side gusset part 5B that is adjacent to the bottom surface part. An upper side gusset part comprising the upper surface part 3 and the upper side gusset part 5A is folded toward the upper surface part 3 side.

Description

  The present invention relates to a liquid storage bag into which liquid is injected and a bag-in-box in which the liquid storage bag is stored in a box-shaped container.

  As a liquid storage bag for storing a large amount of liquid such as business liquid or drinking water for water server, for example, a gusset type liquid storage bag as described in Patent Document 1 is known. This liquid storage bag is used as a bag-in-box stored in a box-shaped container such as a cardboard box, and includes a bottom surface portion, a top surface portion, and a pair of side gusset portions that are folded between them. Yes. Here, the side gusset portion includes an upper gusset portion adjacent to the upper surface portion and a lower gusset portion adjacent to the bottom surface portion, and the liquid containing bag is an upper gusset portion including the upper surface portion and the upper gusset portion. And a lower gusset portion including a bottom surface portion and a lower gusset portion. The liquid storage bag is folded before the liquid is injected, and when the liquid is injected, the liquid infiltrates into the upper gusset part and the lower gusset part, so that the side gusset part expands and expands. have.

JP 2003-191967 A

  However, when the liquid is first introduced into the upper gusset portion when the liquid is injected into the liquid storage bag, the lower gusset portion is pressed by the weight of the liquid injected into the upper gusset portion, resulting in poor development. As a result, there is a problem that the liquid cannot enter the lower gusset portion and the liquid storage bag cannot store the amount of liquid that can be originally stored.

  Accordingly, an object of the present invention is to provide a liquid storage bag and a bag in box that can prevent the occurrence of poor development when liquid is injected into the liquid storage bag.

  A liquid storage bag according to the present invention is a liquid storage bag that is stored in a box-shaped container and into which liquid is injected, and a bottom surface portion that is installed on the bottom surface of the box-shaped container, an upper surface portion that faces the bottom surface portion, A pair of opposing side surface gusset portions connected to the bottom surface portion and the top surface portion and folded between the bottom surface portion and the top surface portion; and an injection port for injecting liquid into the liquid storage bag. An upper gusset portion adjacent to the upper gusset portion and an upper gusset portion including the upper gusset portion and the upper gusset portion are bent to the upper surface portion side.

  According to the liquid containing bag according to the present invention, since the upper gusset portion is bent toward the upper surface portion, the liquid can be prevented from entering the tip side of the bent portion of the upper gusset portion. The liquid thus collected tends to accumulate in the lower gusset portion before the upper gusset portion. As a result, it is possible to avoid a situation in which the lower gusset portion is pressed down by the weight of the liquid accumulated in the upper gusset portion, and therefore, it is possible to prevent a development failure from occurring when the liquid is injected into the liquid storage bag. be able to.

  Moreover, the edge part in the direction orthogonal to the opposing direction of a pair of side surface gusset part may be bend | folded to the upper surface part side. Thus, even when the width of the liquid storage bag in the orthogonal direction is longer than the width of the box-like container, the width of the liquid storage bag in the orthogonal direction can be adjusted, and the liquid storage The liquid storage bag can be stored in the box-shaped container so that an unintended overlapping portion does not occur in the bag. In addition, even in this case, since the liquid can be prevented from entering the tip side of the bent portion of the upper gusset portion, it is possible to prevent a development failure from occurring when the liquid is injected into the liquid storage bag. .

  Further, the bottom surface portion, the top surface portion, and the side gusset portion are formed in a rectangular shape, and the corner portions of the bottom surface portion and the lower gusset portion are inclined at approximately 45 degrees with respect to each side of the bottom surface portion and the side gusset portion. The corners of the upper surface portion and the upper gusset portion may be fused at lines inclined at approximately 45 degrees with respect to the sides of the upper surface portion and the side gusset portion. As a result, when the liquid is injected into the liquid storage bag and water pressure is applied from the inside of the liquid storage bag, the liquid storage bag can be inflated into a rectangular parallelepiped shape to match the shape of the box-shaped container. Further, it is possible to provide a room for an arbitrary shape, for example, by making the excess corner region into a shape provided with a handle hole for easy carrying.

  A bag-in-box according to the present invention includes the above-described liquid storage bag and a box-shaped container in which the liquid storage bag is stored, and a bottom surface portion of the liquid storage bag is installed on a bottom surface of the box-shaped container. It is characterized by being.

  According to the bag-in-box according to the present invention, it is possible to store the liquid storage bag in the box-shaped container in advance, and it is necessary to store in the box-shaped container the liquid storage bag that is heavy and unstable due to the liquid being injected. Therefore, the work effort can be reduced.

  Moreover, the box-shaped container may be folded so that expansion | deployment is possible upwards. By folding the box-shaped container in this manner, the bulk of the bag-in-box can be reduced, so that the bag-in-box can be easily transported and stored. Moreover, since the box-shaped container can be developed upward, it can accommodate the liquid containing bag that has been infused with the liquid and developed.

  Further, the box-shaped container may be formed in a rectangular parallelepiped having an upper surface facing the bottom surface, and the box side surface portion of the box-shaped container may be folded inside the box-shaped container. Thereby, the bulk of the bag-in-box can be reduced, and the bag-in-box can be easily transported and stored. Moreover, when the liquid is injected into the liquid storage bag, the liquid storage bag expands and pushes up the side surface portion of the box that is folded inside the box-shaped container. In this way, by injecting the liquid into the liquid storage bag, the side surface portion of the box folded inside the box-shaped container can be automatically deployed. There is no need to expand the box-like container in advance by work or the like, and workability is improved.

  In this case, the box side surface includes a pair of first box side surfaces facing each other and a pair of second box side surfaces facing each other in a direction orthogonal to the facing direction of the first box side surface. The part may be folded inside the box-shaped container, and the second box side surface part may be folded inside the box-shaped container from above the first box side surface part. By doing in this way, a box-shaped container can be easily folded, without cutting a side part.

  Further, the box-shaped container may have a lid that closes the opening and surrounds the side surface portion of the box. As a result, when the box side surface portion of the box-like container is deployed, it automatically fits into the lid, and the work of attaching the lid to the box body portion does not need to be performed as a separate process, so workability is improved. improves.

  According to the present invention, it is possible to provide a liquid storage bag and a bag-in-box that can prevent a development failure from occurring when the liquid is injected into the liquid storage bag.

It is a front view of a bag-in-box. It is a perspective view of a bag in box. It is sectional drawing in the III-III line of FIG. It is a bottom view of a liquid storage bag. It is a top view of a liquid storage bag. It is a schematic sectional drawing in the VI-VI line of FIG. It is a figure which shows the state which bent the liquid storage bag of FIG. 5 in L1. It is a schematic sectional drawing in the VIII-VIII line of FIG. It is a figure which shows the state which bent the liquid storage bag of FIG. 7 in L2. It is a perspective view which shows the liquid storage bag of the state with which the liquid was filled. It is a perspective view which shows the box main-body part of the box-shaped container which concerns on embodiment. It is a top view which shows the state which folded the box main-body part of FIG. It is a schematic end view which shows the bag in box before pouring a liquid into a liquid storage bag. It is a schematic end view which shows the bag in box after filling a liquid storage bag with the liquid. It is a bottom view of the liquid storage bag which concerns on a modification. It is a perspective view of the box body part concerning a modification. It is a top view which shows the state which folded the box main-body part of FIG.

  Hereinafter, embodiments of a liquid storage bag and a bag-in-box according to the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.

  First, with reference to FIGS. 1-3, the structure of the bag in box 20 which concerns on this embodiment is demonstrated.

  As shown in FIGS. 1 to 3, the bag-in-box 20 includes a liquid storage bag 1 and a substantially rectangular parallelepiped box-shaped container 10 that stores the liquid storage bag 1. The box-shaped container 10 includes a box main body portion 15 having an upper surface opened and a lid 14 that closes the opening of the box main body portion 15. The box main body portion 15 is erected from the box bottom surface portion 11 and the box bottom surface portion 11. It consists of a box side surface portion 12.

  Next, the liquid storage bag 1 according to the present embodiment will be described with reference to FIGS.

  As shown in FIGS. 4 to 6, the liquid storage bag 1 includes a bottom surface portion 2, a top surface portion 3, a pair of side surface gusset portions 5, and an inlet 4 that is attached near the center of the bottom surface portion 2 and injects liquid. Is provided. The bottom surface portion 2 is formed in a rectangular shape, the length of the short side is approximately the same as the width of the box bottom surface portion 11 of the box-shaped container 10, and the length of the long side is the box bottom surface portion 11 of the box-shaped container 10. Longer than the width of the. The top surface portion 3 is formed in a rectangular shape having the same size as the bottom surface portion 2. The side gusset portion 5 is formed in a rectangular shape, the length of the long side is the same as the length of each long side of the bottom surface portion 2 and the top surface portion 3, and the length of the short side is the bottom surface portion 2 and the top surface portion. 3 is shorter than the length of each short side. However, the said dimension of the bottom face part 2, the upper surface part 3, and the side gusset part 5 is only an example, and is not limited to this. In the following description, the direction in which the pair of long sides of the bottom surface portion 2 or the top surface portion 3 faces is simply referred to as the short direction, and the direction in which the pair of short sides of the bottom surface portion 2 or the top surface portion 3 faces is simply the longitudinal direction. It is called direction.

  The long side edge of the side gusset portion 5 is fused to the long side edge of the bottom surface portion 2 and the long side edge of the top surface portion 3, and the side gusset portion 5 is halved between the bottom surface portion 2 and the top surface portion 3. It is folded. The short side edge of the side surface gusset portion 5 is a short side edge of the bottom surface portion 2 or the top surface portion 3 and is fused to a portion adjacent to the short side edge of the side surface gusset portion 5. The portions located on the edge and located between the pair of side surface gusset portions 5 are fused to each other. As described above, the bottom part 2, the top part 3, and the side gusset part 5 are fused and connected to form an integral liquid storage bag 1. The bottom surface 2, the top surface 3, and the side gusset 5 are made of a film material such as synthetic resin. However, the method of connecting the bottom surface portion 2, the top surface portion 3, and the side surface gusset portion 5 is not limited to fusion. Moreover, the raw material of the bottom face part 2, the upper surface part 3, and the side gusset part 5 should just be a material provided with the flexibility and expandability which can be folded and expand | deployed, and is not limited to the said film material.

  As shown in FIG. 6, the side gusset portion 5 includes an upper gusset portion 5 </ b> A adjacent to the upper surface portion 3 and a lower gusset portion 5 </ b> B adjacent to the bottom surface portion 2. The side gusset portion 5 is folded between the bottom surface portion 2 and the top surface portion 3 so that the upper gusset portion 5A and the lower gusset portion 5B are adjacent to each other. Here, the upper gusset portion 7 is the upper gusset portion 5A and the upper gusset portion 7 of the upper surface portion 3 is adjacent to the upper gusset portion 5A, and the lower gusset portion 5B is the lower gusset portion 5B. A side gusset portion 8 is defined respectively.

  As shown in FIGS. 4 to 6, the corner portions of the bottom surface portion 2 and the lower gusset portion 5 </ b> B (corner portions of the lower gusset portion 8) are approximately 45 with respect to the sides of the bottom surface portion 2 and the side gusset portion 5. The upper surface portion 3 and the corner portion of the upper gusset portion 5A (corner portion of the upper gusset portion 7) are approximately 45 with respect to the sides of the upper surface portion 3 and the side gusset portion 5, respectively. It is fused in a line inclined at a degree. Thereby, when a liquid is inject | poured into the liquid storage bag 1 from the injection port 4, the liquid storage bag 1 will swell in the rectangular parallelepiped shape which fits in the box-shaped container 10 (refer FIG. 10).

  Further, at the four corners (the corners of the upper gusset portion 7 and the lower gusset portion 8) of each of the bottom surface portion 2, the upper surface portion 3, and the side surface gusset portion 5, a triangular shape is formed in the region on the apex side from the fused line. Corners 6 are formed. Since the liquid does not flow into the closed space formed by the adjacent corner portions 6, the corner portions 6 can be arbitrarily processed. For example, a handle hole or the like may be provided near the center of the corner 6 for easy carrying. Further, the corner 6 may be excised.

  As shown in FIGS. 5, 7, and 8, the upper gusset portion 7 is bent toward the upper surface portion 3. Here, the crease line L1 where the upper gusset portion 7 is bent is substantially parallel to the longitudinal direction. By bending the upper gusset portion 7 in this way, when liquid is injected from the injection port 4 into the liquid storage bag 1, it is possible to suppress the liquid from entering the tip side of the bent portion of the upper gusset portion 7, The liquid injected from the inlet 4 is likely to accumulate in the lower gusset portion 8 before the upper gusset portion 7. Thereby, the situation where the lower gusset part 8 will be pressed down by the weight of the liquid collected on the upper gusset part 7 can be avoided. In addition, from the viewpoint of effectively suppressing liquid intrusion into the upper gusset portion 7, the fold line L1 is preferably at a position where the upper gusset portion 7 is bent at least about half. However, the position of the crease line L1 is not limited to this, and the penetration of the liquid into the upper gusset portion 7 can be avoided to the extent that the lower gusset portion 8 can be prevented from being pressed by the weight of the liquid accumulated in the upper gusset portion 7. Any position that can be suppressed is acceptable.

  As shown in FIG.7 and FIG.9, the edge part of the liquid storage bag 1 which opposes a long side direction is bend | folded to the upper surface part 3 side. Here, the crease line L2 at which the end is bent is substantially parallel to the short direction. The crease line L <b> 2 is at a position such that the length of the liquid containing bag 1 in the longitudinal direction is less than or equal to the width of the box bottom surface portion 11 of the box-shaped container 10 when the end portion is bent. The liquid storage bag 1 in which the end portion is folded is stored in the box-shaped container 10 so as to be fit in the box bottom surface portion 11 in the longitudinal direction and the short direction. Thereby, it is possible to prevent an unintended overlapping portion from occurring in the liquid containing bag 1. That is, when such an unintended overlap portion is generated in the liquid storage bag 1, when the liquid is injected into the liquid storage bag 1, the liquid accumulated above the overlap portion presses the lower portion of the overlap portion. Although such a development failure occurs, it is possible to prevent such a development failure from occurring by bending the end portion in the longitudinal direction of the liquid containing bag 1 at the above position.

  Next, the box-shaped container 10 which concerns on this embodiment is demonstrated using FIGS.

  As shown in FIG. 11, the box main body 15 of the box-shaped container 10 is formed in a rectangular parallelepiped having an upper surface facing the box bottom surface 11. The box side surface portion 12 includes a pair of first box side surface portions 12A facing each other and a pair of second box side surface portions 12B facing each other in a direction orthogonal to the facing direction of the first box side surface portion 12A.

  The crease lines L31, L32, and L4 in FIG. 11 indicate virtual crease lines. The first box side surface portion 12A is folded inside the box main body portion 15 so as to be mountain-folded at the fold line L31 and valley-folded at the fold line L4 when viewed from the outside of the first box side surface portion 12A. . The second box side surface portion 12B is mountain-folded at the crease line L32 as viewed from the outside of the second box side surface portion 12B, and overlaps the folded first box side surface portion 12A. Folded inside. Thus, by folding the box side surface portion 12 inside the box body portion 15, the bulk of the bag-in-box 20 can be reduced, and the bag-in-box 20 can be easily transported and stored. Further, the box-shaped container 10 can be easily folded without cutting the box side surface portion 12. FIG. 12 shows a plan view of the state in which the box side surface portion 12 is folded inside the box main body portion 15 in this way.

  And the liquid storage bag 1 is accommodated in the box main-body part 15 in the state by which the upper side gusset part 7 was bent and the both ends in the longitudinal direction of the liquid storage bag 1 were bent (refer FIG. 3). In other words, only the portion of the liquid containing bag 1 that is developed into a rectangular parallelepiped and becomes the bottom surface is in contact with the box body 15. Further, as shown in FIG. 13, the box side surface portion 12 is folded inside the box main body portion 15, and the lid 14 closes the opening of the box main body portion 15 and surrounds the box side surface portion 12. It is put on the upper side of the main body 15.

  Next, each state of the bag-in-box 20 (the liquid storage bag 1 and the box-shaped container 10) when the liquid is injected into the liquid storage bag 1 will be described with reference to FIGS.

  As shown in FIG. 13, before the liquid is injected into the liquid storage bag 1, the box side surface portion 12 is folded inside the box main body portion 15, and the lid 14 closes the opening of the box main body portion 15. Is covered on the upper side of the box main body 15 so as to surround the box side face 12.

  When the liquid injection into the liquid storage bag 1 is started, in the upper gusset portion 7, the lower gusset is preceded by the upper gusset portion 7 by preventing the liquid from entering the distal end side of the bent portion. The liquid accumulates in the portion 8, and the lower gusset portion 8 starts to develop before the upper gusset portion 7. Thereafter, when the liquid is sufficiently accumulated in the lower gusset portion 8, the water pressure of the liquid inside the lower gusset portion 8 is increased, so that the liquid is less likely to enter the lower gusset portion 8, while the liquid is not allowed to enter the upper gusset portion 8. The pressure to enter the portion 7 increases. Accordingly, the liquid enters the upper gusset portion 7 so as to push open the bent portion of the upper gusset portion 7, and the upper gusset portion 7 starts to expand. In this way, first, the lower gusset portion 8 is expanded, and then the upper gusset portion 7 is expanded, whereby the liquid containing bag 1 is expanded upward. Then, the box side face part 12 folded inside the box main body part 15 is pushed up by the liquid storage bag 1 developed upward, and the lid 14 covered on the upper side of the box main body part 15 is also pushed up. Then, a portion of the box side surface portion 12 on the front end side with respect to the crease line L31 expands upward, and stops expanding when it matches the side wall of the lid 14. That is, the side wall of the lid 14 serves as a stopper, and is stable when the box side surface portion 12 and the lid 14 are matched. A schematic end view of the bag-in-box 20 in this state is shown in FIG.

  As described above, when the upper gusset portion 7 of the liquid containing bag 1 is bent toward the upper surface portion 3, the lower gusset portion 8 is pressed by the weight of the liquid accumulated in the upper gusset portion 7. A situation can be avoided and the poor deployment of the liquid containing bag 1 can be prevented.

  Moreover, it is possible to prevent an unintended overlapping portion from occurring in the liquid storage bag 1 by further bending the end portion in the longitudinal direction of the liquid storage bag 1. That is, when the liquid is injected into the liquid storage bag 1, it is possible to prevent the development failure such that the liquid accumulated on the upper side of the overlapping part presses the lower part of the overlapping part.

  In addition, by storing the liquid storage bag 1 in the box-shaped container 10 in advance, it is not necessary to store the liquid storage bag 1 that has become heavy and unstable due to liquid injection in the box-shaped container 10.

  Moreover, since the box side surface part 12 folded inside the box-like container 10 can be automatically developed by developing the liquid storage bag 1, manual operation or the like before injecting the liquid into the liquid storage bag 1 is possible. This eliminates the need to unfold the box-shaped container 10 in advance.

  Further, since the box side surface portion 12 automatically fits into the lid 14 when unfolded, it is not necessary to perform the work of attaching the lid 14 to the box body 15 as a separate process.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment.

  In the above embodiment, the liquid containing bag 1 has been described with respect to the case where the bottom surface portion 2, the top surface portion 3, and the side gusset portion 5 are rectangular in shape, but these shapes are not limited to rectangular. For example, it is good also as an octagon shape which cut off the part corresponded to the corner | angular part 6 in the said embodiment. Further, the shape of the bottom surface portion 2, the top surface portion 3, and the side surface gusset portion 5 may not be a rectangular shape as described above, and may be a shape that is smooth and has no corners, for example.

  Further, although the box-shaped container 10 has been described as having the lid 14, the box-shaped container 10 may not include the lid 14. Further, the position of the injection port 4 may be a position deviated from the center portion of the bottom surface portion 2 as shown in FIG. In this case, since the inlet 4 is located on the side of the box side surface 12 when the liquid containing bag 1 is deployed, the inlet 13 for the inlet of the box-shaped container 10 is connected to the inlet 4 of the box side 12. It is provided at a position corresponding to the position. Furthermore, when the liquid is injected into the liquid storage bag 1 from above the box-shaped container 10, an injection port 4 may be provided in the upper surface portion 3 as shown in FIG.

  Moreover, as the box-shaped container 10, the unfolded state in which the unfolded state in the above embodiment is normal may be used. Furthermore, even when the box-shaped container 10 is folded, a folding method other than the above embodiment may be employed. For example, as shown in FIG. 16, when viewed from the outside of the box side surface portion 12, the box side surface portion 12 of the box main body portion 15 is fold-folded at the fold line L31 and valley-folded at the fold line L33. It may be folded inward. FIG. 17 shows a plan view of the box body 15 in which the box side face 12 is folded in this manner. Even if the box side surface portion 12 is folded in this manner, the box side surface portion 12 is automatically deployed by the liquid containing bag 1 that is infused with the liquid and deployed. This eliminates the need to deploy and improves workability.

DESCRIPTION OF SYMBOLS 1 ... Liquid storage bag, 2 ... Bottom part, 3 ... Upper surface part, 4 ... Injection port, 5 ... Side gusset part, 5A ... Upper gusset part, 5B ... Lower gusset part, 6 ... Corner | angular part, 7 ... Upper gusset part , 8 ... lower gusset part, 10 ... box-shaped container, 11 ... box bottom part, 12 ... box side part, 12A ... first box side part, 12B ... second box side part, 13 ... opening for inlet, 14 ... Lid, 15 ... box body, 20 ... bag-in-box.

Claims (8)

A liquid storage bag that is stored in a box-like container and into which liquid is injected,
A bottom surface portion installed on the bottom surface of the box-shaped container;
An upper surface portion facing the bottom surface portion;
A pair of opposed side gusset portions connected to the bottom surface portion and the top surface portion and folded between the bottom surface portion and the top surface portion;
An inlet for injecting liquid into the liquid containing bag,
The side gusset portion includes an upper gusset portion adjacent to the upper surface portion, and a lower gusset portion adjacent to the bottom surface portion,
A liquid containing bag in which an upper gusset portion composed of the upper surface portion and the upper gusset portion is bent toward the upper surface portion.   The liquid storage bag according to claim 1, wherein end portions of the pair of side surface gusset portions in a direction orthogonal to the facing direction are bent toward the upper surface portion. The bottom surface portion, the top surface portion, and the side gusset portion are formed in a rectangle,
The corner portions of the bottom surface portion and the lower gusset portion are fused in a line inclined at approximately 45 degrees with respect to each side of the bottom surface portion and the side surface gusset portion,
The liquid storage according to claim 1 or 2, wherein corners of the upper surface portion and the upper gusset portion are fused in a line inclined at approximately 45 degrees with respect to each side of the upper surface portion and the side surface gusset portion. bag. The liquid storage bag according to any one of claims 1 to 3,
A box-shaped container in which the liquid storage bag is stored,
The bag-in-box in which the bottom part of the said liquid storage bag is installed in the bottom face of the said box-shaped container.   The bag-in-box according to claim 4, wherein the box-like container is folded so as to expand upward.   The box-shaped container is formed in a rectangular parallelepiped whose upper surface facing the bottom surface is opened, and a box side surface portion of the box-shaped container is folded inside the box-shaped container. The bag-in-box as described.   The box side surface portion includes a pair of first box side surface portions opposed to each other and a pair of second box side surface portions opposed to each other in a direction orthogonal to the facing direction of the first box side surface portion. The bag-in-box according to claim 6, wherein the bag is folded inward of the box-shaped container, and the second box side surface is folded inward of the box-shaped container from above the first box side surface.   The bag-in-box according to claim 6 or 7, wherein the box-shaped container has a lid that closes the opening and surrounds the box side surface portion.

Images