JP2017030776A - Flexible container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible container capable of increasing a fill ration of a material to be accommodated, by enhancing charging efficiency.SOLUTION: A flexible container 10 includes a bottom 12, a top surface part 14, and a trunk 16 that is joined to peripheral edges of the bottom 12 and the top surface part 14. The trunk 16 is formed in a shape in which a height-direction intermediate part is depressed in a curved shape inward in comparison with upper and lower ends. The depression amount of the height-direction intermediate part with respect to the upper and lower ends is in the range of 1-8% with respect to a height-direction dimension of the trunk 16.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a flexible container.

  2. Description of the Related Art Conventionally, a flexible container that is formed of a flexible and strong material and accommodates an object to be accommodated such as a granular material is known. The flexible container is disclosed in Patent Document 1 below, for example. The flexible container has a polygonal shape or a circular shape on the bottom surface. The flexible container can be filled with a large amount of objects such as powder particles and is slightly deformed as the objects are filled.

Japanese Utility Model Publication No. 6-76185

  It is preferable that the flexible container can be filled with as much as possible an object. Accordingly, an object of the present invention is to provide a flexible container capable of increasing the filling amount of the objects to be contained by increasing the filling efficiency.

  As a result of intensive studies, the present inventors have discovered that when a flexible container is filled with an object to be contained, it is difficult to fill the object near the bottom, and based on this knowledge, the filling efficiency can be increased. Thus, the present invention has been completed.

  In order to achieve the above object, the present invention includes a bottom portion, an upper surface portion, and a body portion joined to a periphery of the bottom portion and the upper surface portion, and the body portion has an intermediate portion in the height direction at an upper end. It is the flexible container currently formed in the shape dented in the curved shape inside compared with a part and a lower end part.

  In the present invention, since the trunk portion is curved so as to be recessed at the intermediate portion in the height direction, when the object to be filled is filled in the flexible container, compared to the case where the intermediate portion of the trunk portion is not recessed. In the middle portion in the height direction, the swelling is suppressed, while the object to be accommodated is more easily filled in the vicinity of the bottom portion. Therefore, the filling amount of the object to be accommodated in the vicinity of the bottom can be increased, and the filling efficiency can be increased. Therefore, the filling amount can be increased as a whole without increasing the size.

  It is preferable that the sheet | seat material which comprises the said trunk | drum is formed so that the width | variety of the trunk periphery direction in the intermediate part of a height direction is shorter than the width | variety of the trunk periphery direction in an upper end part and a lower end part. In this aspect, the width of the middle part of the body part is smaller than the widths of the upper end part and the lower end part, and the body part can be reliably formed in a shape that is recessed in a curved shape.

  The upper surface portion and the bottom portion may be formed in a polygonal shape. In this aspect, when a large number of flexible containers are stored and transported side by side, the flexible containers can be efficiently arranged. In other words, since the middle part of the body part has a concave shape in a curved shape and the upper surface part and the bottom part are polygonal, it is possible to fill the objects to be contained at least to the corners of the bottom part, and in the vicinity of the bottom part. Can be placed without gaps between other flexible containers located next to it, so it can be stored more efficiently than a conventional general round flexible container or one with a round top and bottom. And can be transported. In addition, there is no need to provide a lining material for maintaining the middle part of the body part in a square shape, so that there is a cost advantage.

  The upper end part and the lower end part in the joint part of the unit sheet materials constituting the trunk part may coincide with the corners of the upper surface part and the bottom part. In this embodiment, the filling amount in the vicinity of the upper portion can be increased without causing the corner portion of the upper surface portion to sag.

  1-8% may be sufficient as the amount of dents of the intermediate part of the said height direction with respect to the said upper end part and the said lower end part with respect to the dimension of the height direction of the said trunk | drum. In this aspect, since the ratio of the dent amount is 1% or more, the effect of denting the intermediate portion can be effectively exhibited. Also. Since the ratio of the dent amount is 8% or less, it is not necessary to pull the sheet material excessively when joining the end portions of the sheet material constituting the body portion, so it is difficult to join the end portions. Can be prevented.

  As described above, according to the flexible container of the present invention, it is possible to increase the filling amount of the objects to be accommodated by increasing the filling efficiency.

It is a figure which shows the external appearance of the flexible container which concerns on embodiment of this invention. It is a top view of the flexible container. It is a side view of the flexible container. It is a bottom view of the flexible container. It is a figure which shows the external appearance of the flexible container which concerns on other embodiment of this invention. It is a figure which shows the external appearance of the flexible container which concerns on other embodiment of this invention. It is a figure which shows the external appearance of the flexible container which concerns on other embodiment of this invention. It is a figure which shows the external appearance of the flexible container which concerns on other embodiment of this invention. It is a figure which shows the external appearance of the flexible container as a comparative example.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 to 4, the flexible container 10 according to the present embodiment includes a bottom portion 12, an upper surface portion 14, and a body portion 16 joined to the peripheral portions of the bottom portion 12 and the upper surface portion 14. . The bottom portion 12 and the upper surface portion 14 are formed in a quadrangular shape, specifically, a square shape. The bottom portion 12 and the upper surface portion 14 are not limited to a rectangular shape, and may be a polygonal shape such as a hexagonal shape.

  The trunk | drum 16 is formed in the square cylinder shape. A suspension tape 20 for inserting an unillustrated suspension rope is attached to each surface (side surface 16 a) of the trunk portion 16. The hanging tape 20 is provided at the center position in the width direction on each side surface 16a. That is, the hanging position is the center position of the polygonal side that constitutes the upper surface portion 14. The hanging tape 20 is not limited to the center position in the width direction of the side surface 16a of the body portion 16. For example, as shown in FIG. 5, the hanging tape 20 may be provided at a position along the side 16 b between the two side surfaces 16 a in the trunk portion 16.

  As shown in FIG. 2, the upper surface portion 14 is provided with an injection port 22. The injection port 22 is provided with an unillustrated injection cylinder extending upward from the upper surface portion 14, an upper lid 22a for closing the injection cylinder, and an upper lid presser 22b for holding the upper lid 22a. An object to be accommodated in the flexible container 10 is filled into the flexible container 10 through the inlet 22. Examples of the objects to be accommodated include granular materials and powdery materials.

  As shown in FIG. 4, the bottom portion 12 is provided with a discharge port 24 for discharging the objects in the flexible container 10. The discharge port 24 is provided with an unillustrated discharge cylinder extending downward from the bottom portion 12, a bottom cover 24a for closing the discharge cylinder, and a bottom cover presser 24b for pressing the bottom cover 24a. Yes.

  The bottom part 12, the upper surface part 14, and the trunk | drum 16 are all comprised by the sheet material which consists of the same raw material. For example, the sheet material may be made of a resin film or may be made of a synthetic fiber. When the sheet material is made of a resin film, the sheet material 26 constituting the upper surface portion 14 and the sheet material 28 constituting the body portion 16 can be joined to each other by welding. For this reason, as shown in FIGS. 1 and 2, the outer peripheral edge of the sheet material 26 constituting the upper surface portion 14 and the upper edge portion of the sheet material 28 constituting the body portion 16 are overlapped. The overlapping portion is the joint portion 30. The same applies to the sheet material 28 constituting the body portion 16 and the sheet material 32 constituting the bottom portion 12. For this reason, the overlapping portion of the sheet material 28 constituting the body portion 16 and the sheet material 32 constituting the bottom portion 12 serves as a joint portion 34. On the other hand, when the sheet material is made of synthetic fiber, the sheet material 26 constituting the upper surface portion 14 and the sheet material 28 constituting the body portion 16 can be joined together by sewing. The same applies to the sheet material 26 constituting the body portion 16 and the sheet material 32 constituting the bottom portion 12.

  The sheet material 28 constituting the body portion 16 is formed in a cylindrical shape by joining unit sheet materials 28a constituting each surface of the body portion 16 (side surface 16a of the flexible container 10).

  As shown in FIG.1 and FIG.3, the trunk | drum 16 is formed in the shape where the intermediate part of a height direction is dented inside. That is, the flexible container 10 has the smallest cross-sectional area at the center in the height direction, and the cross-sectional area gradually increases from the center to the top and from the center to the bottom. For this reason, the intermediate part of the height direction of each surface 16a of the trunk | drum 16 becomes a shape where width | variety is narrow compared with an upper end part and a lower end part. Therefore, each unit sheet material 28a has a shape in which the intermediate portion in the height direction is narrower than the upper end portion and the lower end portion. The width of the unit sheet material 28a gradually decreases from the upper end portion to the center portion in the height direction, and the width of the unit sheet material 28a gradually increases from the center portion in the height direction to the lower end portion. Each part has a curved shape (see FIG. 3). For this reason, the joining portion 36 between the unit sheet materials 28a also has a gently curved shape.

  The amount of dent in the intermediate portion in the height direction of the body portion 16 is preferably 1 to 8% with respect to the height dimension of the body portion 16. For this reason, also in the unit sheet material 28a, it is preferable that the ratio of the width depression amount c to the height h of the unit sheet material 28a is 1 to 8%. That is, each end of the unit sheet material 28a is curved so that the dent amount c / 2 is 0.5 to 4% with respect to the height h.

  In the present embodiment, the joint portion 36 where the unit sheet materials 28 a are joined is provided at a position corresponding to the position of the polygonal side that forms the upper surface portion 14 and the bottom portion 12. That is, the joining portion 36 is along the side 16 b where the side surfaces 16 a intersect each other in the trunk portion 16. Therefore, at the corner portion of the upper surface portion 14, the two unit sheet materials 28a constituting the two side surfaces 16a adjacent to each other in the body portion 16 and the sheet material 26 constituting the upper surface portion 14 are overlapped and joined. The joined portion 38 is formed.

  Note that the joining portion 36 between the unit sheet materials 28 a is not limited to the configuration provided along the side 16 b of the body portion 16. For example, as shown in FIGS. 6 and 7, the joint portion 36 may be provided at the center position in the width direction of each side surface 16 a of the body portion 16. In this case, the joining portion 38 in which the two unit sheet materials 28 a and the sheet material 26 constituting the upper surface portion 14 are overlapped and joined becomes the central portion of each side of the upper surface portion 14. In this configuration, the suspending tape 20 may be provided along the side 16b of the body portion 16 as shown in FIG. 6, and is provided at the center in the width direction of the side surface 16a as shown in FIG. May be. In the case of FIG. 6, the hanging position is a corner of the upper surface portion 14, and in the case of FIG. 7, the hanging position is the center position in the width direction of the side surface 16a.

  Here, for the flexible container 10 shown in FIG. 1, the flexible container 10 shown in FIG. 6, and the flexible container 60 (see the comparative example, FIG. 9) in which the intermediate portion in the height direction is not recessed, respectively, polyethylene resin The experimental results comparing the filling amount when filling the pellets will be described. In addition, the flexible container of FIG. 9 has the constant cross-sectional area of the trunk | drum over the whole up-down direction.

  In the flexible container 10 of FIG. 1, the first width (lateral direction) and the second width (depth direction) at the center position in the height direction of the trunk portion 16 are 1117 mm and 1118 mm, respectively, and the first width ( (Lateral direction) and second width (depth direction) were 1140 mm and 1140 mm, respectively. Swelling was observed near the bottom 12. The flexible container 10 could be filled with 700 kg of polyethylene resin pellets. The height was 1207 mm.

  In the flexible container 10 of FIG. 6, the first width (lateral direction) and the second width (depth direction) at the center position in the height direction of the body portion 16 are 1116 mm and 1122 mm, respectively, and the first width ( (Lateral direction) and second width (depth direction) were 1103 mm and 1122 mm, respectively. Even in this form, swelling was observed near the bottom 12. This flexible container 10 could be filled with 700 kg. The height was 1210 mm. In the flexible container 10 of FIG. 6, a phenomenon that the corner portion of the upper surface portion 14 hangs was observed. Note that this phenomenon was the same in the flexible container 10 of FIG. The flexible container 10 shown in FIG.

  On the other hand, in the flexible container 60 of FIG. 9 (comparative example), the first width (lateral direction) and the second width (depth direction) at the center position in the height direction of the body portion 62 are 1100 mm and 1088 mm, respectively. The first width (lateral direction) and the second width (depth direction) were 1084 mm and 1086 mm, respectively. In this flexible container 60, only 660 kg could be filled. The height was 1200 mm.

  The reason why the filling amount of the flexible container 60 in FIG. 9 is small is presumed to be due to the fact that the width in the vicinity of the bottom 64 is smaller than in the case of FIGS. For this reason, it is estimated that the filling amount is not large in the flexible container 60 of FIG.

  On the other hand, in the flexible container 10 of FIG. 1 and FIG. 6, since the center part of the trunk | drum 16 in the height direction is dented, the width | variety near the bottom part 12 becomes wide at the time of filling of the to-be-contained object. Thus, it is assumed that the shape of the flexible container 10 can be easily maintained, and the filling amount in the vicinity of the bottom portion 12 can be increased.

  As described above, in the flexible container 10 of the present embodiment, since the trunk portion 16 is curved so as to be recessed in the intermediate portion in the height direction, when the object to be stored is filled in the flexible container 10, Compared with the case where the middle part of the body part 16 is not recessed, the swelling in the middle part in the height direction is suppressed, while the object to be contained is more easily filled in the vicinity of the bottom part 12. Accordingly, it is possible to prevent a decrease in the filling amount of the object to be accommodated in the vicinity of the bottom portion 12 and increase the filling efficiency. Therefore, the filling amount can be increased as a whole without increasing the size. Further, since the rectangular shape is maintained even when the objects are filled, it is possible to prevent the arrangement efficiency from deteriorating when a large number of flexible containers 10 are arranged.

  Moreover, in this embodiment, in each unit sheet material 28a of the trunk portion 16, the width in the middle portion in the height direction is formed to be shorter than the width in the trunk circumference direction at the upper end portion and the lower end portion. For this reason, the width | variety of the intermediate part of the trunk | drum 16 is smaller than the width | variety of an upper end part and a lower end part, and the trunk | drum 16 can be reliably formed in the shape dented in curve shape.

  Moreover, in this embodiment, since the upper surface part 14 and the bottom part 12 are formed in polygonal shape, when arranging and storing and transporting many flexible containers 10, a flexible container 10 can be arrange | positioned efficiently. In other words, since the middle part of the body part 16 is concavely curved and the upper surface part 14 and the bottom part 12 are polygonal, it becomes possible to fill the object to be filled up to at least the corners of the bottom part 12. As for the vicinity of the bottom 12, it becomes possible to arrange it with other flexible containers located next to each other without a substantial gap. Therefore, the conventional general round flexible container and the top and bottom of the container are round. In comparison, it is possible to store and transport efficiently. Moreover, since it is not necessary to provide the lining material for maintaining the intermediate part of the trunk | drum 16 in a square shape, there exists a cost advantage.

  In the present embodiment, the upper end portion and the lower end portion of the joint portion 36 of the unit sheet materials 28a constituting the body portion 16 coincide with the corner portions of the upper surface portion 14 and the bottom portion 12, so It is possible to increase the filling amount in the vicinity of the upper part without sagging of the part.

  Even when the joint portion 36 between the unit sheet materials 28a is provided at the center portion in the width direction of the side surface 16a of the body portion 16, the height of the body portion 16 is increased at the joint portion 36 between the waistline end portions of the sheet material 28. While the depression in the middle portion in the vertical direction is reliably maintained, the width of the body portion 16 in the vicinity of the bottom portion 12 is easily maintained in a wide state. For this reason, it becomes easy to ensure the filling amount of the object to be stored at the lower end portion of the joint portion 36.

  Moreover, in this embodiment, since the ratio of the dent amount with respect to the dimension in the height direction is 1% or more in the body portion 16, the effect of denting the intermediate portion can be effectively exhibited. Also. Since the ratio of the dent amount is 8% or less, when joining the end portions of the unit sheet material 28a, it is not necessary to pull the unit sheet material 28a excessively, and thus it becomes difficult to join the end portions. This can be prevented.

  Note that the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made without departing from the spirit of the present invention. For example, as shown in FIG. 8, the upper surface part 14 and the bottom part 12 may be formed in a circular shape (see FIG. 8). In this case, the sheet material 28 constituting the body portion 16 may be one. By rolling the sheet material 28 into a cylindrical shape, the cylindrical body 16 can be formed. In this case, the joining portion 36 between the circumferential end portions of the sheet material 28 becomes one place in the circumferential direction. The sheet material 28 may be composed of a plurality of unit sheet materials, and may be joined at a plurality of locations in the circumferential direction.

DESCRIPTION OF SYMBOLS 10 Flexible container 12 Bottom part 14 Upper surface part 16 Trunk part 16a Side surface 16b Side 26 Sheet material 28 Sheet material 28a Unit sheet material 30 Joining part 32 Sheet material 34 Joining part 36 Joining part 38 Joining part

Claims (5)

A bottom portion, an upper surface portion, and a body portion joined to a periphery of the bottom portion and the upper surface portion;
The trunk portion is a flexible container in which an intermediate portion in the height direction is formed in a shape recessed in a curved shape inward compared to the upper end portion and the lower end portion.   2. The flexible container according to claim 1, wherein the sheet material constituting the trunk portion is formed such that a width in a waistline direction at an intermediate portion in a height direction is shorter than a width in a waistline direction at an upper end portion and a lower end portion.   The flexible container according to claim 1, wherein the top surface and the bottom are formed in a polygonal shape.   4. The flexible container according to claim 3, wherein an upper end portion and a lower end portion in a joint portion between the unit sheet materials constituting the trunk portion are coincident with corner portions of the upper surface portion and the bottom portion.   5. The dent amount of the intermediate portion in the height direction with respect to the upper end portion and the lower end portion is 1 to 8% with respect to the height direction dimension of the trunk portion. Flexible container.

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