Flexible container bag and method for manufacturing the same

Abstract

The present invention provides a flexible container bag that is easy to manufacture and facilitates the discharge of its contents, as well as a method for manufacturing the same. [Solution] The flexible container bag 10 has four joining sections 14 formed across the bottom wall 40 and the discharge section 60. Through holes 15 through which a string-like member 80 can be inserted are provided in the joining sections 14, and through holes 15 through which the string-like member 80 can be inserted are provided in the portions of the joining sections 14 near each apex of the discharge section 60. The portion of the discharge section 60 facing the bottom wall 40 is formed to follow the bottom wall 40, and a protruding piece 43 is formed that protrudes from the bottom wall 40. The protruding piece 43 is folded over toward the bottom wall 40, and the through holes 15 are connected. The string-like member 80 is inserted through the through holes 15, positioned parallel to the bottom wall 40, and crossed on the opposite side of the bottom wall 40 and tightened, thereby closing the discharge section 60.

Description

Technical Field

[0006] , , , ,

[0001] The present invention relates to a flexible container bag used for transporting and storing contents, and a method for manufacturing the same.

Background Art

[0002] As a conventional flexible container bag, there is one described in Patent Document 1. According to this, it includes a rectangular tubular bag body, a bottom portion for closing the bag body, a hanging handle disposed on the bag body, and a discharge cylinder disposed on the bottom portion (see paragraph 0002, FIG. 2).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the above flexible container bag, the joining of the bag body and the bottom requires a three-dimensional sewing technique. When discharging the contents, the discharge cylinder binding tape is untied to open the discharge cylinder. However, since the discharge cylinder binding tape bites into the discharge cylinder and is difficult to untie, improvement in workability has been desired.

[0005] In view of the above circumstances, the present invention provides a flexible container bag that can be easily manufactured and is easy to discharge the contents, and a method for manufacturing the same.

Means for Solving the Problems

[0006] The invention described in claim 1 is a flexible container bag comprising a main body having at least a rectangular tubular peripheral wall and a bottom wall that closes the lower side of the peripheral wall, having an input section at the top of the main body and a rectangular tubular discharge section in the bottom wall, wherein the contents to be contained are placed in from the input section with the discharge section closed, and the contents to be contained are discharged from inside when the discharge section is opened, The bottom wall is composed of four trapezoidal bottom wall forming sections, and the discharge section is composed of four square-shaped discharge section forming sections. The outer edges of adjacent bottom wall forming portions and the outer edges of adjacent discharge portion forming portions are overlapped to form four joining portions across the bottom wall and the discharge portion. The aforementioned joining portion is provided with an insertion hole through which a string-like member can be inserted. The portion of the discharge section facing the bottom wall is formed to follow the bottom wall, and a protruding piece is formed that protrudes from the bottom wall, with the protruding piece folded over toward the bottom wall, and the insertion hole is in a state of communication. The discharge section is closed when the string-like member is inserted through the insertion hole, arranged parallel to the bottom wall, and crossed and tightened on the opposite side of the bottom wall.

[0007] According to this, for example, it can be easily manufactured by flat sewing, and the contents can be discharged from the discharge opening by cutting the string-like members, thus creating a flexible container bag that facilitates the discharge of its contents.

[0008] Furthermore, each of the aforementioned discharge section forming sections is provided with a second insertion hole. The protruding pieces of the second insertion holes are folded over so that they communicate with each other, and are fastened together by a second string-like member so that they can be opened and closed.

[0009] This allows for the creation of a flexible container bag suitable for storing highly fluid materials.

[0010] Furthermore, the invention described in claim 3 relates to a method for manufacturing a flexible container bag comprising a main body having at least a rectangular tubular peripheral wall and a bottom wall that closes the lower side of the peripheral wall, having an input section at the top of the main body and a discharge section in the bottom wall, wherein the contents to be contained are placed in from the input section with the discharge section closed, and the contents to be contained are discharged from inside when the discharge section is opened, A cylindrical member is folded inward in a gusset shape, and an insertion hole is formed in the portion that will become the joining area described later, through which a string-like member can be inserted. It is then cut so that a trapezoidal bottom wall forming portion and a square discharge portion are formed, and the outer portion of the cylindrical part and the gusseted portion folded inward are joined together so that there is a joining area. The cylindrical portion is expanded to form the rectangular tubular peripheral wall, and the bottom wall forming portion is bent perpendicular to the peripheral wall to form the bottom wall. The portion of the discharge section forming part that is on the bottom wall side is formed to follow the bottom wall, and a protruding piece is formed that protrudes from the bottom wall, and the protruding piece is folded over the bottom wall side so that the insertion hole is in communication with it. The string-like member is inserted through the insertion hole, positioned parallel to the bottom wall, and then crossed and tightened on the opposite side of the bottom wall to close the discharge section.

[0011] According to this, a flexible container bag that achieves the effects of the invention of claim 1 can be manufactured.

[0012] Furthermore, a second insertion hole is provided in each of the aforementioned discharge section forming sections. The protruding pieces are folded and overlapped so that the second insertion holes are in communication with each other, and then fastened with the second string-like member so that they can be opened and closed.

[0013] This allows for the manufacture of flexible container bags suitable for storing highly fluid materials. [Brief explanation of the drawing]

[0014] [Figure 1]Perspective view of the flexible container bag according to the first embodiment of the present invention. [Figure 2] Front view of the flexible container bag according to the embodiment. [Figure 3] Rear view of the flexible container bag according to the embodiment. [Figure 4] Plan view of the flexible container bag according to the embodiment. [Figure 5] Bottom view of the flexible container bag according to the embodiment. [Figure 6] Left side view of the flexible container bag according to the embodiment. [Figure 7] Right side view of the flexible container bag according to the embodiment. [Figure 8] Cross-sectional view taken along the line VIII-VIII of FIG. 4. [Figure 9] Explanatory drawing of the manufacturing process of the flexible container bag according to the embodiment. [Figure 10] Explanatory drawing of the manufacturing process of the flexible container bag according to the embodiment, which is a continuation of FIG. 9. [Figure 11] Explanatory drawing of the manufacturing process of the flexible container bag according to the embodiment, which is a continuation of FIG. 10. [Figure 12] Perspective view of the flexible container bag according to the second embodiment of the present invention. [Figure 13] Front view of the flexible container bag according to the embodiment. [Figure 14] Enlarged view of the rounded portion of FIG. 13. [Figure 15] Explanatory drawing of the manufacturing process of the flexible container bag according to the embodiment. [Figure 16] Explanatory drawing of the manufacturing process of the flexible container bag according to the embodiment, which is a continuation of FIG. 15. [Figure 17] Explanatory drawing of the manufacturing process of the flexible container bag according to the embodiment, which is a continuation of FIG. 16.

Mode for Carrying Out the Invention

[0015] Next, a first embodiment of the flexible container bag of the present invention will be described with reference to the drawings.

[0016] The flexible container bag 10, as outlined in Figures 1 to 8, comprises a main body 20 having a rectangular tubular perimeter wall 30, a bottom wall 40 that closes the lower side of the perimeter wall 30, and an upper wall 50 that closes the upper side of the perimeter wall 30. The bottom wall 40 has a rectangular tubular discharge section 60, and the upper wall 50 has an input section 70. When the discharge section 60 is closed, the contents to be stored are placed in through the input section 70, and when the discharge section 60 is opened, the contents inside are discharged.

[0017] In this embodiment, the main body 20 is made of polypropylene and comprises a peripheral wall 30, a bottom wall 40, and an upper wall 50.

[0018] As shown in Figure 1, the peripheral wall 30 is formed in a seamless, four-tubular shape. A long, strip-shaped suspension belt 31 is provided at the top of the corner portion of the peripheral wall 30.

[0019] As shown in Figure 1, the bottom wall 40 is formed in a rectangular shape, with a square-shaped hole (not shown) in the center, allowing the contents to be discharged.

[0020] As shown in Figure 4, the upper wall 50 is formed in a rectangular shape, with a circular hole in the center, allowing items to be placed inside.

[0021] The discharge section 60 is made of polyethylene and is formed in a rectangular tubular shape. The discharge section 60 is connected to the bottom wall 40 at its upper end. The structure and closing method of the discharge section 60 will be described later.

[0022] As shown in Figure 1, the input section 70 is formed by seamlessly shaping a polyethylene sheet into a cylindrical form. The lower part of the input section 70 is sewn and connected to the portion of the upper wall 50 near the hole.

[0023] A roughly trapezoidal rope-passing section 72 extends from near the hole in the upper wall 50, and a rope 73 is inserted through the cylindrical portion at the upper end of the rope-passing section 72.

[0024] A method for manufacturing the flexible container bag 10 will now be described. As shown in Figures 9(a) and (b), a cylindrical member 11 is folded inward in a gusset shape, and insertion holes 15 are formed in the parts that will become the joining allowance 14 described later, in other words, the four corners of the discharge section forming part 13 described later, through which the string-like member 80 can be inserted. In this embodiment, a total of eight insertion holes 15 are formed.

[0025] As shown in Figure 9(c), the material is cut so that a trapezoidal bottom wall forming portion 12 and a rectangular discharge portion forming portion 13 are formed. The outer portion of the cylindrical part and the gusset portion folded inward are joined together so that there is a joining allowance 14.

[0026] Then, as shown in Figure 10(a), the cylindrical portion of the cylindrical member 11 is expanded to form a rectangular tubular peripheral wall 30, and the bottom wall forming portion 12 is bent perpendicular to the peripheral wall 30 to form a bottom wall 40, and a rectangular tubular discharge portion 60 is formed.

[0027] As shown in Figure 10(b), the portion of the discharge section forming section 13 that forms the discharge section 60 is formed to be on the bottom wall 40 side, and a protruding piece 43 that protrudes from the bottom wall 40 is formed. As shown in Figure 10(c), the protruding piece 43 is folded over on the bottom wall 40 side so that the insertion hole 15 is in communication with it.

[0028] As shown in Figures 11(a) to (d), the string-like member 80 is inserted through the insertion hole 15, positioned along the left-right direction on the bottom wall 40 side and parallel to each other, and then crossed on the opposite side from the bottom wall 40 and tightened to close the portion that will become the discharge section 60.

[0029] More specifically, as shown in Figure 11(a), the string-like member 80 is inserted through the insertion hole 15 from the bottom wall 40 side, the string-like member 80 is laid diagonally on the opposite side from the bottom wall 40, and then inserted through the insertion hole 15 to the bottom wall 40 side.

[0030] Then, as shown in Figures 11(b) and (c), the string-like member 80 is laid along the left-right direction on the bottom wall 40 side, and inserted through the insertion hole 15 to the side opposite the bottom wall 40. On the side opposite the bottom wall 40, the string-like member 80 is laid diagonally and inserted through the insertion hole 15.

[0031] As shown in Figure 11(d), on the bottom wall 40 side, the string-like member 80 is aligned along the left-right direction and joined at both ends, thereby closing the portion that will become the discharge section 60.

[0032] On the input section 70 side, the upper wall 50 is sewn to the peripheral wall 30, a cross-shaped cut is made in the center of the upper wall 50, and it is folded outwards to form a rope-passing section 72, and the tip is sewn into a tube shape. A binding rope 73 is inserted through this tube-shaped section to complete the flexible container bag 10.

[0033] The usage of the flexible container bag 10 will now be described. As shown in Figures 1-7, the contents to be stored are placed into the input section 70. Once the contents are placed inside the flexible container bag 10, the input section 70 is closed with the binding rope 73, and the bag is moved to a designated location using a forklift, hoist, etc., via the lifting belt 31 for storage.

[0034] When discharging the contents, the flexible container bag 10 is moved to a designated location via the lifting belt 31 using a forklift, hoist, etc., and the string-like member 80 is cut with pruning shears or similar tools without going under the flexible container bag 10. Cutting the string-like member 80 opens the discharge section 60, and the contents are discharged from the discharge section 60. At this time, the discharge section 60 can be opened and the contents discharged without the worker having to go directly under the discharge section 60, thus contributing to ensuring worker safety.

[0035] The flexible container bag 10 having the above configuration comprises a main body 20 having at least a rectangular tubular peripheral wall 30 and a bottom wall 40 that closes the lower side of the peripheral wall 30, an input section 70 at the top of the main body 20 and a rectangular tubular discharge section 60 in the bottom wall 40, in which the contents to be contained are placed in from the input section 70 with the discharge section 60 closed, and the contents to be contained are discharged from inside when the discharge section 60 is opened, The bottom wall 40 is composed of four trapezoidal bottom wall forming sections 12, and the discharge section 60 is composed of four square-shaped discharge section forming sections 13. The outer edges of adjacent bottom wall forming sections 12 and the outer edges of adjacent discharge section forming sections 13 are overlapped to form four joining sections 14 across the bottom wall 40 and the discharge section 60. The joining portion 14 is provided with an insertion hole 15 through which a string-like member 80 can be inserted. The portion of the discharge section 60 facing the bottom wall 40 is formed to follow the bottom wall 40, and a protruding piece 43 is formed that protrudes from the bottom wall 40, with the protruding piece 43 folded over toward the bottom wall 40, and the insertion hole 15 being in communication with it. The string-like member 80 is inserted through the insertion hole 15, positioned parallel to the bottom wall 40, and crossed on the opposite side of the bottom wall 40, and tightened, thereby closing the discharge section 60.

[0036] According to this, for example, it can be easily manufactured by flat sewing, and the contents can be discharged from the discharge section 60 by cutting the string-like member 80, thus creating a flexible container bag that facilitates the discharge of contents.

[0037] Furthermore, as a manufacturing method, the flexible container bag is a manufacturing method comprising a main body 20 having at least a rectangular tubular peripheral wall 30 and a bottom wall 40 that closes the lower side of the peripheral wall 30, an input section 70 at the top of the main body 20 and a discharge section 60 in the bottom wall 40, wherein the contents to be contained are placed in from the input section 70 with the discharge section 60 closed, and the contents to be contained are discharged from inside when the discharge section 60 is opened, The cylindrical member 11 is folded inward in a gusset shape, and an insertion hole is formed in the portion that will become the joining allowance 14 through which the string-like member 80 can be inserted. It is then cut so that a trapezoidal bottom wall forming portion 12 and a square discharge portion forming portion 13 are formed, and the outer portion of the cylindrical part and the gusset portion folded inward are joined together so that there is a joining allowance 14. The cylindrical portion is expanded to form a rectangular tubular peripheral wall 30, and the bottom wall forming portion 12 is bent perpendicular to the peripheral wall 30 to form a bottom wall 40. The portion of the discharge section forming section 13 that faces the bottom wall 40 is formed to follow the bottom wall 40, and a protruding piece 43 that protrudes from the bottom wall 40 is formed, and the protruding piece 43 is folded over toward the bottom wall 40 so that the insertion hole 15 is in communication with it. The string-like member 80 is inserted through the insertion hole 15, positioned parallel to the bottom wall 40, and then crossed and tightened on the opposite side of the bottom wall 40, thereby closing the portion that will become the discharge section 60.

[0038] According to this, it is possible to manufacture flexible container bags that produce the above-mentioned effects.

[0039] A flexible container bag according to a second embodiment of the present invention will be described with reference to the drawings. Components similar to those in the first embodiment are denoted by the same reference numerals, and their descriptions, in whole or in part, are omitted.

[0040] In the flexible container bag 10, through holes 15 were formed at the four corners of the discharge section forming section 13, through which the string-like member 80 could be inserted. However, in the flexible container bag 10A, as shown in Figures 12 to 17, a total of four insertion holes 15A are formed on the outer edge of the bottom wall forming section 12.

[0041] In the flexible container bag 10A, the string-like members 80 are arranged in the same way as in the flexible container bag 10. In the flexible container bag 10, the parallel portions of the string-like members 80 were positioned between the joining allowance 14 and the bottom wall 40 and were not visible, but in this embodiment, the parallel portions of the string-like members 80 are positioned on the underside of the bottom wall 40, and most of them are visible.

[0042] Furthermore, two second insertion holes 16A are formed at the lower part of each discharge section forming section 13. The protruding piece 43A that protrudes from the bottom wall 40 is folded again and overlapped with the bottom wall 40 side so that the protruding piece 43 is in communication with the second insertion holes 16A.

[0043] Then, the second string-like member 90A is passed through the second insertion hole 16A and tightened, closing the portion that will become the discharge section 60.

[0044] The string-like member 80 is positioned to pass through the insertion hole 15A, similar to the flexible container bag 10.

[0045] Even with this configuration, it is possible to create a flexible container bag that allows for easy discharge of its contents.

[0046] Furthermore, each discharge section forming section 13 is provided with a second insertion hole 16A. The protruding pieces 43A are folded over so that the second insertion holes 16A are in communication with each other, and are fastened together by the second string-like member 90A so that they can be opened and closed.

[0047] This allows for the creation of a flexible container bag suitable for storing highly fluid materials.

[0048] Furthermore, it becomes possible to manufacture flexible container bags that exhibit the above effects.

[0049] The flexible container bag of the present invention is not limited to the above configuration. That is, various design modifications are possible as long as they do not depart from the spirit of the present invention.

[0050] For example, the input section 70 can have the same configuration as the discharge section 60.

[0051] Furthermore, the input section 70 can be configured such that the upper part of the peripheral wall 30 is open and no cylindrical member is provided on the upper wall 50. [Explanation of Symbols]

[0052] 10 Flexible Container Bags 11. Cylindrical member 12 Bottom wall forming part 13 Discharge part forming part 14 Joint allowance 15 Through hole 20 Main body 30 Peripheral wall 40 Bottom wall 43 Projecting piece 60 Discharge section 70 Input section 80 String-like member 10A Flexible Container Bag 15A Through hole 16A Second insertion hole 43A Projecting piece 90A Second string member

Claims

1. A flexible container bag comprising a main body having at least a rectangular tubular peripheral wall and a bottom wall that closes the lower side of the peripheral wall, having an input section at the top of the main body and a rectangular tubular discharge section in the bottom wall, wherein the contents to be contained are placed in from the input section with the discharge section closed, and the contents to be contained are discharged from inside when the discharge section is opened, The bottom wall is composed of four trapezoidal bottom wall forming sections, and the discharge section is composed of four square-shaped discharge section forming sections. The outer edges of adjacent bottom wall forming portions and the outer edges of adjacent discharge portion forming portions are overlapped to form four joining portions across the bottom wall and the discharge portion. The aforementioned joining portion is provided with an insertion hole through which a string-like member can be inserted. The portion of the discharge section facing the bottom wall is formed to follow the bottom wall, and a protruding piece is formed that protrudes from the bottom wall, with the protruding piece folded over toward the bottom wall, and the insertion hole is in a state of communication. A flexible container bag characterized in that the string-like member is inserted through the insertion hole, arranged parallel to the bottom wall, and crossed and tightened on the opposite side of the bottom wall, thereby closing the discharge section.

2. Each of the aforementioned discharge section forming sections is provided with a second insertion hole. The flexible container bag according to claim 1, characterized in that the protruding pieces of the second insertion holes are folded over so that they communicate with each other, and are fastened together by a second string-like member so that they can be opened and closed.

3. A method for manufacturing a flexible container bag comprising a main body having at least a rectangular tubular peripheral wall and a bottom wall that closes the lower side of the peripheral wall, having an input section at the top of the main body and a discharge section in the bottom wall, wherein the contents to be contained are placed in from the input section with the discharge section closed, and the contents to be contained are discharged from inside when the discharge section is opened, A cylindrical member is folded inward in a gusset shape, and an insertion hole is formed in the portion that will become the joining area described later, through which a string-like member can be inserted. It is then cut so that a trapezoidal bottom wall forming portion and a square discharge portion are formed, and the outer portion of the cylindrical part and the gusseted portion folded inward are joined together so that there is a joining area. The cylindrical portion is expanded to form the rectangular tubular peripheral wall, and the bottom wall forming portion is bent perpendicular to the peripheral wall to form the bottom wall. The portion of the discharge section forming part that is on the bottom wall side is formed to follow the bottom wall, and a protruding piece is formed that protrudes from the bottom wall, and the protruding piece is folded over the bottom wall side so that the insertion hole is in communication with it. A method for manufacturing a flexible container bag, characterized by inserting the string-like member through the insertion hole, arranging it so that it is parallel to the bottom wall, and crossing it on the opposite side of the bottom wall and tightening it to close the portion that will become the discharge section.

4. Furthermore, a second insertion hole is provided in each of the aforementioned discharge section forming sections. The method for manufacturing a flexible container bag according to claim 3, characterized in that the protruding pieces are folded so that the second insertion holes are in communication with each other, and then fastened with a second string-like member so that it can be opened and closed.

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