JP2017105481A - Flexible container bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of a flexible container bag for water non-impermeability, namely, reductions in transportation and storage stability due to a complex structure and poor shape stability when a liquid is poured in.SOLUTION: This flexible container bag is made of a water nonpermeable blank, and has a truncated polygonal-pyramidal shape formed by a polygonal bottom surface, the side surfaces of a plurality of isosceles trapezoids with each side of the bottom surface set as a lower base, and an opened top surface, side parts forming inner angles with the bottom sides of the isosceles trapezoids form folded parts, and the side parts and/or folded parts are heat/welded.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a flexible container bag, and more particularly to a flexible container bag for transporting and storing a liquid.

  The flexible container bag can be folded small when not in use, and is excellent in storability, so that it is widely used for transporting goods.

  These flexible container bags are used for transporting and storing industrial products such as powder and granules, fertilizers, feeds, etc., as well as for transporting and storing liquids and liquids containing liquids. ing.

  As the flexible container bag as described above, a non-permeable material such as an inner bag and an outer bag made of a highly heat-insulating sheet can be used for transferring a large amount and efficiently while maintaining the freshness of caught fresh fish. A fresh fish transfer bag configured as a heavy bag has been proposed (for example, Patent Document 1).

  In addition, as a flexible container bag that can stand on its own without using an internal arrangement of a reinforcing material or a stand even when liquid is poured, a regular polygonal bottom surface and a plurality of isosceles triangles with each side of the bottom surface being the bottom side A flexible container bag having a shape obtained by cutting off the upper part of a regular polygonal pyramid formed of side surfaces has been proposed (for example, Patent Document 2).

JP2007-1640 JP 2014-61937 A

  However, Patent Document 1 has a configuration in which a water-impermeable inner bag and a heat-insulating outer bag are combined, and is structurally complicated as compared with a flexible container bag for non-liquid use. Further, although Patent Document 2 has a certain degree of self-supporting property, when it is made of a flexible material that can be easily folded, the side and sides of the truncated polygonal pyramid are outside with the weight of the liquid when the liquid is poured. It is difficult to maintain a stable polygonal pyramid shape, and thus there is a problem that the transportation and storage stability is lowered.

  The present invention has been made in view of the above problems, and its purpose is a simple configuration that does not use a non-water-permeable material such as an inner bag, but is stable when a liquid is introduced. An object of the present invention is to provide a water-impermeable flexible container bag that is easier to maintain the polygonal shape of the head and thereby has excellent transport and storage stability.

As a result of intensive studies to solve the above problems, the present inventors have completed the present invention.
That is, the present invention (1) is made of a non-permeable material, and includes a truncated bottom surface comprising a polygonal bottom surface, a plurality of isosceles trapezoidal side surfaces each having a bottom at each side of the bottom surface, and an open top surface. The side of the isosceles trapezoid that has a pyramid shape and a side part that forms an inner corner has a folded part into which the water-impermeable material is diffracted, and the side part and / or the folded part are heat-welded. This is a flexible container bag.

  The present invention (2) is the flexible container bag according to the invention (1), wherein the folded portion is thermally welded to the side surface.

  The present invention (3) is characterized in that the folding portion is independent of the side surface and exists outside the inner volume formed by the truncated polygonal pyramid shape. It is a container bag.

  The present invention (4) is the flexible container bag according to the invention (1), (2) or (3), characterized by comprising one sheet of the water-impermeable material.

  The present invention (5) is characterized in that the folding portion is fixed in the thickness direction of the plurality of stacked water-impermeable materials, (1), (2), (3 ) Or the flexible container bag according to (4).

  The present invention (6) is characterized in that the invention (1), (2), (3), (4) is characterized in that it is formed from the water-impermeable material cut in advance so that the upper side of the side surface is horizontal Or a flexible container bag according to (5).

  The present invention (7) is characterized in that the upper bottom portion of the side surface is multiplexed by folding the water-impermeable material, the invention (1), (2), (3), (4), (5) or It is a flexible container bag as described in (6).

  According to the present invention, it is a simple structure that does not use a water-impermeable material such as an inner bag, but it is a water-impermeable flexible material that can maintain a stable truncated polygonal pyramid shape even when liquid is introduced. Container bags can be provided.

  That is, a non-permeable material is used to form a truncated polygonal pyramid shape, and a plurality of fold-in portions are provided on the side portions thereof, and heat welding is performed as appropriate, so that the pressure from the liquid (gravity acting on the liquid) is increased. It is important to resist and strengthens the side part that should become the skeleton for maintaining the shape of the truncated polygonal pyramid shape, and even if a transport belt is attached by sewing etc., water leakage from the seam etc. It is possible to provide a flexible container bag that is not likely to occur.

It is a perspective view which shows one Example of the flexible container bag of this invention. It is a side view which shows one Example of the flexible container bag of this invention. It is an expanded view of one Example of the flexible container bag of this invention. It is a figure which shows the assembly point of one Example of the flexible container bag of this invention. It is a figure which shows the assembly point of one Example of the flexible container bag of this invention. It is a figure which shows the assembly point of one Example of the flexible container bag of this invention. It is a perspective view which shows other embodiment of the flexible container bag of this invention. It is a side view which shows other embodiment of the flexible container bag of this invention. It is an expanded view of other embodiment of the flexible container bag of this invention. It is a figure which shows the assembly point of other embodiment of the flexible container bag of this invention. It is a figure which shows the assembly point of other embodiment of the flexible container bag of this invention. It is a figure which shows the assembly point of other embodiment of the flexible container bag of this invention.

  Hereinafter, embodiments of the flexible container bag of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to these embodiments.

  The isosceles trapezoid according to the present invention refers to a figure in which the inner angles (hereinafter also referred to as the base angles) of both ends of one base are equal to each other. At this time, the inner angles at both ends of the other set of bases are also equal to each other. That is, the isosceles trapezoid is a line-symmetric figure, and its axis of symmetry is a straight line that passes through the midpoints of the two bases.

  Further, the side portion according to the present invention refers to a side portion forming a substantially vertical direction of a side surface having an isosceles trapezoidal shape of a flexible container bag, and a side side peripheral portion including a folded portion, and the side surface according to the present invention. The upper bottom portion refers to the substantially horizontal side surface upper bottom of the side surface having the isosceles trapezoidal shape of the flexible container bag and the upper bottom peripheral portion including the folded portion.

  The polygonal bottom face according to the present invention may have any polygonal shape, but is preferably a regular polygon. Further, when the shape is a triangle, the inner volume tends to decrease, and as the number of corners increases, the length of one side becomes shorter and the posture stability of the flexible container bag tends to decrease. Most preferred.

  Moreover, it is preferable that the upper side bottom of the isosceles trapezoid shape which forms the side surface of a flexible container bag is horizontal.

  The multiple fold-in portions indicated by reference numerals 6 and 11 have a structure in which a plurality of water-impermeable materials are stacked, but are preferably fixed in the thickness direction in which these water-impermeable materials are stacked. By taking such a structure, the side part of a flexible container bag is strengthened structurally, and there exists an effect that it becomes easy to maintain a truncated polygonal pyramid shape against the gravity which acts on a liquid.

(First embodiment)
FIG. 1 shows a flexible container bag 1 having a truncated polygonal pyramid shape with a square bottom surface 2. Reference numeral 3 is a side surface of the flexible container bag having an isosceles trapezoidal shape with one side of the bottom surface 2 as a lower base. Reference numeral α is an upper side surface corresponding to the upper base of the reference numeral 3, and reference numeral β is a reference numeral 3 The inner angle (hereinafter also referred to as the base angle) of the surface, the reference numeral 4 indicates the opened upper surface (entrance to the internal space), and the reference numeral 5 indicates a transport belt used for transport. Reference numeral 6 denotes a plurality of fold-in portions formed by diffusing a plurality of side portions forming the base and inner angle of the isosceles trapezoid and heat-welding the side surface 3. Reference numeral 7 denotes a belt fixing means for fixing the transport belt of reference numeral 5 sandwiched between non-water-permeable materials folded at the side portions, and is an eyelet ring in this embodiment. This eyelet ring is fixed in a penetrating state over the thickness direction of the non-permeable material stacked by folding.

  FIG. 2 shows a side view of the flexible container bag 1, and FIG. 3 shows a development view of the flexible container bag 1. The 8-a surface and 8-b surface serve as a plurality of fold-in portions that form the symbol 6 after folding and welding.

  Moreover, FIG. 4-a-FIG. 4-c are the figures for demonstrating the example of the folding method of the water-impermeable material in a side part, and a heat welding part. As a method of forming the flexible container bag 1 of the first embodiment, first, incisions are made at 8 locations of the reference numeral 8-c shown in FIG. 3, and then the reference numerals 8-a and 8-b are shown in FIG. In a manner as shown in 4-a, the 8-a surface and the 8-b surface are overlapped and the doubled portion is heat-welded. At this time, the 8-d surface may be removed separately from the side surface 3 or may be left to reinforce the upper bottom portion of the side surface 3. Next, as shown in FIG. 4-b, the welded 8-a surface is folded to the 8-b surface side and thermally welded. The 1-folded portion 9 formed in this way is thermally welded to the side surface 3 as shown in FIG. The flexible container bag 1 having the truncated polygonal pyramid shape of the first embodiment can be obtained by carrying out this operation similarly for the other three side portions. In the case of attaching the transport belt, it may be attached by fixing means such as an eyelet ring or sewing after the transport belt is sandwiched in the folding portion and heat-welded in any of the heat-welding steps. In this case, it is preferable that the transport belt itself is made of a heat-weldable material because there is little possibility of detachment or the like until it is fixed with an eyelet ring or the like. In addition, when attaching a transport belt made of a material that is not suitable for heat welding, a member of a material that can be welded is sewn to the transport belt with a sewing machine or the like, and then sandwiched and welded to fix it with an eyelet ring or the like. May be.

When liquid is poured into a truncated polygonal pyramid-shaped flexible container bag, a force that tends to spread to the ground side acts on the liquid according to gravity, so the side and side portions of the flexible container bag are subjected to liquid pressure. It will be. Here, by bending a plurality of side portions of the flexible container bag and performing heat welding as appropriate, the flexible container bag has an effect of strengthening the side portions to be a skeleton for maintaining a truncated polygonal pyramid shape. At the same time, even if the transport belt is attached by sewing or the like, it is possible to prevent water leakage from the seam or the like. That is, by strengthening the side portions, even if a flexible material excellent in foldability during storage is used, the truncated polygonal pyramid shape can be easily maintained against the gravity acting on the liquid. Furthermore, you may reinforce the upper base part of the isosceles trapezoid surface which forms a side surface other than a side part suitably with a water-impermeable material.
In that case, the method of folding the 8-d surface, which is connected only to the 3rd surface, into the inner side or the outer side of the flexible container bag and heat-sealing by cutting the 8-c in FIG. 3 is also preferable from the viewpoint of strength and workability. is there.

(Second embodiment)
In FIG. 5, the flexible container bag 10 in the state in which the multiple fold-in part 11 became independent from the side surface is shown. The term “independent” refers to a state in which the plurality of folded portions 11 are not fixed to the side surface 3 by welding or the like. In this embodiment, as shown in FIG. 5, the plurality of fold-in portions 11 are located outside the space forming the internal volume of the flexible container bag 10. Reference numeral 12 denotes a conveyor belt sewing portion. Also in this case, it is preferable that the sewing is performed (fixed) in the thickness direction of the laminated non-permeable material. 6 shows a side view of the flexible container bag 10, and FIG. 7 shows a development view of the flexible container bag 10. FIG. In FIG. 7, the solid line and the alternate long and short dash line indicate the difference in folding direction, and the area surrounded by the broken line indicates an area that is cut in advance, or an area that is folded inside or outside the flexible container bag. In this way, the non-permeable material having a square bottom surface 2 is formed on the outside of the space forming the internal volume of the flexible container bag 10 in a state where the plurality of fold-in portions 11 are independent from the side surface, thereby being closer to a square. It is possible to obtain a flexible container bag with a truncated polygonal pyramid shape from the shape, and it is possible to reduce the material portion to be cut or folded, which is economical and the side portion is as shown in the developed view of FIG. By forming a truncated polygonal shape using a single water-impermeable material that has not been cut toward the apex 19, even if the heat welded part is peeled off, it can have an effect of preventing water leakage. In the case where the flexible container bag having the isosceles trapezoidal shape is cut so that the upper surface α on the side surface is horizontal, the process may be performed in advance or after the truncated polygonal pyramid shape is formed. Moreover, although it is good also as a process which folds the surplus part shown with a broken line, when workability | operativity etc. are considered, it is preferable to excise a broken line part beforehand.

  Next, a method for forming a flexible container bag according to the second embodiment will be described with reference to FIGS. 8A to 8C. FIG. 8A shows a state of folding along the folding lines of reference numerals 13a, 13b, 14a, 14b, and 15 shown in FIG. Next, the surface formed by the folding lines 13a, 14a, and 17a and the surface formed by the folding lines 13a, 15, and 18a are thermally welded. Similarly, the surface formed by the folding lines 13b, 14b, 17b and the surface formed by the folding lines 13b, 15, 18b are thermally welded. After that, a line connecting the middle point of the side 17a and the vertex 19 and a line connecting the middle point of the side 17b and the vertex 19 are folded in the direction shown in FIG. Next, a transport belt is sandwiched between the surfaces 20a and 20b, and sewing is performed as shown at 12 in FIG. At this time, it is preferable that the sewing is performed (fixed) in the thickness direction of the laminated water-impermeable material. Next, the flexible container bag 10 of the second embodiment having a truncated polygonal pyramid shape can be obtained by working in the same manner on the other three sides. In the case where the transport belt is the same as the water-impermeable material of the flexible container bag main body, the transport belt may be fixed with an eyelet ring or the like after being thermally welded to the main body. Moreover, when the internal volume of a flexible container bag is 50L or more, it is good also as a response | compatibility to a weight, for example by turning a belt for conveyance to the bottom face of a flexible container bag.

  In any of the embodiments, the heat welding location may be appropriately determined in consideration of water tightness and side strength. What is necessary is just to select the method of heat welding suitably by the kind of water-permeable material, a shape, the shape of a welding part, etc. Specifically, it can be carried out by a known method such as high frequency welding, hot air welding, hot plate welding, impulse welding, iron welding, ultrasonic welding, laser welding or the like.

  It is preferable that the base angle of the isosceles trapezoid which becomes the side surface of these flexible container bags is set to about 60 ° to 85 °. If the angle is less than 60 °, the center of gravity of the content is lowered to increase the stability, but the internal volume is reduced. If the angle exceeds 85 °, the internal volume increases, Since the center of gravity rises, the stability during transportation may be reduced.

  The method of attaching the belt 5 to the flexible container bag body may be attached by sewing, rivets, eyelet rings, bolts or other fasteners, or may be attached to the body via other strong materials. It is preferable that the fixing means is attached over the thickness direction of the water-impermeable material stacked at the folding portion. By carrying out like this, the side part which should become a frame for maintaining a truncated polygonal pyramid shape can be reinforced more. Further, without attaching the belt, for example, only an eyelet ring process can be performed, and a belt or the like can be formed through a rope or the like.

  As the water-impermeable material constituting the flexible container bag, a heat-weldable thermoplastic resin is used as a raw material. For example, polyethylene, polypropylene, polyester, vinyl chloride or the like is preferably laminated on a cloth or the like. Furthermore, those that are lightweight and have excellent moldability, weather resistance, and chemical resistance are preferred. In addition, when performing hot-air welding, non-permeable materials may be damaged by hot air. For example, a cloth woven with flat yarn is made into a multilayer, and the metallocene-catalyzed short chain branched polyethylene is an upper layer and an intermediate layer. A multilayer sheet laminated on the lower layer can be preferably used.

  Moreover, the flexible container bag of this invention may arrange | position a string body etc. around an entrance, and may squeeze and close it, and may cover an entrance using a cover body. Further, if necessary, the upper side bottom portion of the isosceles trapezoid can be reinforced with a reinforcing member.

  As described above, the flexible container bag of the present invention has a simple configuration that does not use a water-impermeable material such as an inner bag, but has a more stable truncated polygonal pyramid shape even when liquid is introduced. Stable transportation and storage can be realized by the effect that is easy to maintain.

1, 10 ············································································································ ············ Conveying belts 6, 11 ········································ Belt fixing means 9 12 ......... Belt sewing parts 13a to 15 ..... Folding line [alpha] ......... Side upper base [beta] ... Inner angle (bottom angle) )

Claims (7)

Made of non-permeable material,
It has a truncated polygonal pyramid shape consisting of a polygonal bottom surface, a plurality of isosceles trapezoidal sides with the bottom of each side of the bottom surface, and an open top surface,
The side of the isosceles trapezoid and the side forming the inner angle have a folded portion into which the water-impermeable material is plunged a plurality of times;
The flexible container bag, wherein the side portion and / or the folded portion are heat-welded.   The flexible container bag according to claim 1, wherein the folded portion is thermally welded to the side surface.   2. The flexible container bag according to claim 1, wherein the folded portion is independent from the side surface and is present outside an inner volume formed by the truncated polygonal pyramid shape.   The flexible container bag according to any one of claims 1 to 3, wherein the flexible container bag is made of one sheet of the water-impermeable material.   The flexible container bag according to any one of claims 1 to 4, wherein the folded portion is fixed in the thickness direction of the plurality of non-permeable materials stacked.   The flexible container bag according to any one of claims 1 to 5, wherein the flexible container bag is formed from the water-impermeable material that has been cut in advance so that an upper bottom surface of the side surface is horizontal.   The flexible container bag according to any one of claims 1 to 6, wherein an upper bottom portion of the side surface is multiplexed by folding the water-impermeable material.

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