JP6323757B2 - Liquid storage container, storage method thereof, outer container and liquid storage container combination, and liquid filling and dispensing method thereof - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a liquid storage container, a storage method thereof, a combination of an outer container and a liquid storage container, and a liquid filling method thereof, and in particular, storage and transportation of fluid contents in industrial chemicals, pharmaceuticals, cosmetic raw materials, and the like. The present invention relates to a liquid storage container, a storage method thereof, a combination of an exterior container and a liquid storage container, and a liquid filling and dispensing method thereof.

  Conventionally, in the fields of industrial chemicals, pharmaceuticals and cosmetic raw materials, a liquid storage container has been placed inside an outer container made of aluminum, steel, stainless steel, fiberboard, etc. for storage and transportation, and fluid flows into this liquid storage container. A method of filling the sex contents is used.

  Such a liquid storage container can be reused by simply removing a used liquid storage container from the outer container and setting a new liquid storage container in the outer container. Compared to filling fluid contents in steel or other external containers directly, it has the advantage of eliminating the hassle of washing, etc., and is widely used as a container for industrial chemicals, pharmaceuticals and cosmetic raw materials .

  Moreover, what has the bag main body which has an inner bag and an outer bag, and the spout attached to the bag main body as a liquid storage container is known. Such a liquid storage container is first folded compactly and inserted into the exterior container from the opening of the exterior container. Thereafter, nitrogen gas is supplied into the liquid storage container to inflate the liquid storage container inside the outer container. Next, the liquid container is filled with the content liquid.

Further, generally, the spout has a structure that allows a gas to enter and exit between the outer container and the liquid storage container, in addition to the normal path for pouring liquid into and out of the liquid storage container. In addition, when the liquid is poured out, there are methods such as sucking up by a pump or sending out compressed air or gas between the outer container and the liquid storage container.

JP 2008-7154 A

  Conventionally, as described above, after the liquid storage container is folded compactly, the liquid storage container is inserted into the outer container from the opening, and then nitrogen gas is supplied into the liquid storage container to inflate the liquid storage container in the outer container. ing.

  However, when the liquid storage container is inflated in the outer container, it is difficult to sufficiently inflate the liquid storage container. If the liquid storage container cannot be sufficiently inflated, the internal volume of the liquid storage container decreases.

Further, when the bulge is unevenly bulged, the bag may bulge so as to be pushed into the vicinity of the spout, which may cause a problem of closing the spout.

  The present invention has been made in consideration of the above points, and a liquid storage container that can sufficiently inflate and make it difficult to close the liquid storage container in the outer container before filling with the content liquid, and its storage It is an object of the present invention to provide a method, a combination of an outer container and a liquid storage container, and a liquid filling and dispensing method thereof.

The present invention relates to a liquid storage container stored in an exterior container having an opening, and a bag body having a shape having an upper edge, a bottom edge, and two side edges, and a spout mounting attached to the upper edge of the bag body And a spout that is attached to and detached from the opening of the outer container, and a pair of bent portions are formed by bending a corner between the upper edge and each side edge of the bag body. The bag body has a plurality of bellows portions folded through longitudinal folding lines extending in the longitudinal direction, the width of the bag body is W0, and the width of the spout attachment portion of the spout is When W1 is the width of the abdomen and W is the width of each bent part,
W <b ≦ (W0−W1) / 2
It is a liquid storage container characterized by becoming.

  In the present invention, it is preferable that one of the pair of bent portions is bent toward the front side and the other bent portion is bent toward the back side.

In the present invention, the bag body has a folded portion that is folded via an upper lateral fold curve and a lower lateral fold curve, and the overall length of the bag body is H, the upper edge, and the lower lateral fold. When the length between the curve is X and the length between the upper lateral fold curve and the lower lateral fold curve is Y,
10% <X / H <50%, 3% <Y / H <25%, X ≧ Y
It is preferable that

  In the present invention, it is preferable that the upper edge of the bag body includes two heat seal portions, and the bottom edge and the two side edges include one heat seal portion.

The present invention includes an exterior container having an opening, a bag body having a shape having an upper edge, a bottom edge, and two side edges, and a spout attachment attached to the upper edge of the bag body. And a spout that is attached to and detached from the opening of the outer container, and a pair of bent portions are formed by bending a corner between the upper edge and each side edge of the bag body. The bag body has a plurality of bellows portions folded through longitudinal folding lines extending in the longitudinal direction, the width of the bag body is W0, and the width of the spout attachment portion of the spout is When W1 is the width of the abdomen and W is the width of each bent part,
W <b ≦ (W0−W1) / 2
A liquid storage container, and a combination of an exterior container and a liquid storage container.

The present invention provides a liquid storage container having a bag body having a shape having an upper edge, a bottom edge, and two side edges, and a spout having a spout attachment portion attached to the upper edge of the bag body. And a step of forming a pair of bent portions by bending a corner between the upper edge and each side edge of the bag body, and a longitudinal folding line extending in the longitudinal direction of the bag body. A step of forming a plurality of bellows portions by folding, and storing the liquid storage container from the bottom edge side of the bag body into the exterior container through the opening, and the outlet of the bag body into the opening of the exterior container The width of the bag body is W0, the width of the spout attachment part of the spout is W1, the width of the belly is W, and the width of each bent part is b. When
W <b ≦ (W0−W1) / 2
This is a storage method for a liquid storage container.

The present invention includes an exterior container having an opening, a bag body having a shape having an upper edge, a bottom edge, and two side edges, and a spout attachment attached to the upper edge of the bag body. And a spout that is attached to and detached from the opening of the outer container, and a pair of bent portions are formed by bending a corner between the upper edge and each side edge of the bag body. The bag body has a plurality of bellows portions folded through longitudinal folding lines extending in the longitudinal direction, the width of the bag body is W0, and the width of the spout attachment portion of the spout is When W1 is the width of the abdomen and W is the width of each bent part,
W <b ≦ (W0−W1) / 2
In a liquid filling method using a combination of an exterior container and a liquid storage container provided with a liquid storage container, gas is supplied into the bag body from the spout of the liquid storage container, and the bag body A method of filling a liquid, comprising: inflating the inside of the exterior container; and filling the bag body with the liquid from the spout.

The present invention includes an exterior container having an opening, a bag body having a shape having an upper edge, a bottom edge, and two side edges, and a spout attachment attached to the upper edge of the bag body. And a spout that is attached to and detached from the opening of the outer container, and a pair of bent portions are formed by bending a corner between the upper edge and each side edge of the bag body. The bag body has a plurality of bellows portions folded through longitudinal folding lines extending in the longitudinal direction, the width of the bag body is W0, and the width of the spout attachment portion of the spout is When W1 is the width of the abdomen and W is the width of each bent part,
W <b ≦ (W0−W1) / 2
A liquid dispensing method using a combination of an exterior container and a liquid storage container provided with a liquid storage container, and a step of pouring the liquid filled in the bag body from the spout This is a liquid pouring method characterized by the above.

  As described above, according to the present invention, the liquid storage container accommodated in the exterior container can be reliably inflated and hardly blocked.

FIG. 1 is a plan view showing a liquid container according to the present invention. 2A is a cross-sectional view showing a spout of the liquid storage container, and FIG. 2B is a bottom view showing the spout. FIG. 3 is a cross-sectional view showing the layer structure of the bag body of the liquid storage container. FIG. 4 is a view showing a longitudinal folding line of the bag body of the liquid storage container. FIG. 5 is a diagram illustrating a storage method of the liquid storage container. FIG. 6 is a view showing a storage method of the liquid storage container. FIG. 7 is a view showing a storage method of the liquid storage container. FIG. 8 is a diagram illustrating a storage method of the liquid storage container. FIG. 9 is a view showing a storage method of the liquid storage container. 10A and 10B are views showing a state in which the liquid storage container is inserted into the outer container.

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

  Here, FIG. 1 is a plan view showing an embodiment of a liquid container according to the present invention, FIG. 2 (a) is a longitudinal sectional view of the spout, and FIG. 1 (b) is a view from the spout attachment portion side of the spout. FIG. 3 is a bottom view, and FIG. 3 is a schematic diagram showing a layer structure of an outer bag and an inner bag used for a bag body of a liquid storage container.

  In the liquid storage container 1 according to the present embodiment, the multiplex film 2 in which the outer bag 20 and the inner bag 21 are overlapped is overlapped so that the inner bags 21 face each other to make a total of four sheets, and the four sides are heat-sealed. The bag body 3 in which the heat seal portion 10 is formed, and the spout 4 disposed on the upper edge 3a of the bag body 3 and heat-sealed in advance between the inner bags 21 are provided.

  In this embodiment, the bag body 3 is obtained by laminating the multiple films 2 so that the inner bags 21 face each other, and heat-sealing the four sides to form the heat-seal portion 10, but this is not limitative. For example, after the multiple film 2 is folded so that the inner bags 21 face each other, the three outer peripheral sides that overlap each other may be heat-sealed. Moreover, you may form each inner edge part of the heat seal part 10 so that the inner edge may become arc shape. As a result, a structure in which the fluid content hardly remains at the corners is obtained. Moreover, the bag body does not necessarily need to be composed of multiple films, and the film structure of the bag body 3 can be appropriately selected according to the contents and quantity.

  Note that, as described above, the bag body 3 is obtained by stacking the two multiple films 2 and heat-sealing the periphery to form the heat seal portion 10. In this case, the bag body 3 has a rectangular shape having an upper edge 3a, a bottom edge 3b, and two side edges 3c, 3c. The upper edge 3a includes two upper edge heat seal portions 10a, the bottom edge 3b includes one bottom edge heat seal portion 10b, and each side edge 3c, 3c includes one side edge heat seal portion 10c. The upper edge heat seal portion 10a, the bottom edge heat seal portion 10b, and the side edge heat seal portion 10c constitute the heat seal portion 10.

  Moreover, the upper edge 3a of the bag body 3 includes the two upper edge heat seal portions 10a as described above. In this way, by dividing the heat seal portion 10a of the upper edge 3a into two, for example, compared to a case where one heat seal portion having a width of two heat seal portions 10a is formed on the upper edge 3a, The upper edge 3a can be configured to be relatively soft.

  The spout 4 is composed of a spout mounting portion 4a and a spout engaging portion 4b connected to the spout mounting portion 4a. As shown in FIG. 1, the spout 4 is a spout mounting portion 4a. It is heat-sealed between the inner bags 21 of the multiple film 2.

  As shown in FIGS. 2A and 2B, the spout mounting portion 4a of the spout 4 is flat and has a through hole 4c in the center. Usually, when the spout 4 is heat-sealed between the inner bags 21 of the multiplex film 2 at the spout mounting portion 4a, a gap is formed between the inner bags 21 and the two regions surrounded by the end of the spout mounting portion 4a. It is easy to become poorly sealed. In order to prevent this, plate-like ribs 4d are provided at both ends, and a gap is prevented by melting the plate-like ribs 4d during heat fusion.

  The spout 4 is preferably manufactured by an injection molding method. The resin used for this is not particularly limited as long as it is a resin that can be injection-molded. However, since it is bonded to the resin constituting the inner surface of the inner bag 21 of the multiple film 2 by thermal bonding, the inner surface of the inner bag 21 is used. It is necessary to select appropriately depending on the resin that constitutes, but usually high-density polyethylene that is rigid even at high temperatures and hardly embrittles at low temperatures is suitable.

  Next, the multiple film 2 constituting the bag body 3 will be described. In the present embodiment, the multiple film 2 is composed of a film constituting the outer bag 20 and a film constituting the inner bag 21.

  As shown in FIG. 3, as the outer bag 20 of the bag body 3, a laminate of unstretched nylon (thickness 20 μm) 20a / linear low density polyethylene (thickness 40 μm) 20b can be used. As this, linear low density polyethylene (thickness 70 μm) can be used.

  In this case, since the outer bag 20 includes the unstretched nylon 20a, the degree of elongation of the outer bag 20 can be increased. For example, the outer bag 20 has a degree of elongation of 300% to 500%. Thus, since the outer bag 20 can have a high degree of elongation, the bag body 3 can be made soft as a whole, and the bag body 3 is inserted into the outer container 5 as will be described later. When the bag body 3 is inflated in the exterior container by supplying nitrogen gas therein, the bag body 3 can be inflated smoothly.

  In addition, as a material of the bag main body 3, it is not restricted to what was mentioned above.

  For example, as the material of the inner bag 21, materials such as low density polyethylene, low density polyethylene and linear low density polyethylene can be used.

  As the material of the outer bag 20, a material having an elongation of 300% to 500%, such as low density polyethylene and linear low density polyethylene can be used.

  Next, the shape of the bag body 3 will be further described. For example, as shown in FIG. 4, the bag body 3 includes a plurality of bellows portions 12 that are formed in a bellows shape by way of a plurality of, for example, four longitudinal folding lines 11 extending in the vertical direction.

  In this case, each belly portion 12 of the bag body 3 has substantially the same width W. The spout 4 attached to the bag body 3 is arranged corresponding to the central belly portion 12 among the five belly portions 12.

  Further, the bag body 3 is folded through an upper lateral folding line 15a and a lower lateral folding line 15b as will be described later to form a folding part 16 extending in the lateral direction (see FIGS. 6 and 7). .

6 and 7, the total length of the bag body 3 before folding is H, the distance between the upper edge 3a of the bag body 3 and the lower lateral bending portion 15b is X, and the upper lateral folding line 15a. When the distance between the lower lateral folding line 15b (the height of the folding part 16) is Y,
10% <X / H <50%, 3% <Y / H <25%, X ≧ Y
It is preferable that

  That is, by making X / H described above smaller than 50%, the folded portion 16 of the bag body 3 can be formed in the upper part of the entire length of the bag body 3. For this reason, the weight of the part below the folding part 16 of the bag body 3 can be increased, and immediately after the liquid storage container 1 is inserted into the outer container 5, the part below the folding part 16 of the bag body 3 The outer container 5 can be reliably dropped by its own weight. As a result, the liquid storage container 1 can be reliably inflated in the outer container 5.

  Further, by making X / H larger than 10%, it is possible to reliably form the folded portion 16 having a sufficient length Y.

  Further, by setting the value of Y / H to be greater than 3%, it is possible to form the folded portion 16 having a sufficient length Y. Further, by setting X ≧ Y, the spout engaging portion 4b can be positioned above the upper lateral folding line 15a without overlapping the folding portion 16. In addition, by setting the value of Y / H to less than 25%, it is possible to secure a region of the bag body 3 below the folding portion 16 and to ensure that the portion below the folding portion 16 in the outer container 5 is self-weighted. Can be dropped.

  Furthermore, the bag body 3 has a folding line 13 extending between the upper edge 3a and the side edges 3c, 3c, and the upper edge 3a is interposed between the side edges 3c, 3c via the folding line 13. By bending the corners, a pair of triangular bent portions 14, 14 is formed (see FIG. 5). In this way, when the corner has a right angle, a pair of triangular bent portions 14 and 14 are formed, but when the corner has an R shape, instead of the pair of triangular bent portions 14 and 14, An R-shaped bent portion having an R shape is formed. In the present embodiment, these triangular bent portions 14 and 14 or the R-shaped bent portion are collectively referred to as a bent portion. Hereinafter, in the present embodiment, examples of the triangular bent portions 14 and 14 are shown as the bent portions, but the bent portions are not limited to the triangular bent portions, and are R-shaped bent portions or others. You may use the bent part of the shape.

  By forming such triangular bent portions 14, 14, when the bag body 3 is inflated by supplying nitrogen gas to the liquid storage container 1 inserted from the opening 5 a into the outer container 5, the bag body 3. The corner between the upper edge 3a and the side edges 3c, 3c is prevented from being caught by the opening 5a of the outer container 5. For this reason, when the bag main body 3 of the liquid storage container 1 is inflated in the outer container 5, the bag main body 3 is prevented from being caught and damaged by the opening 5 a of the outer container 5.

In FIG. 5, the length (height) of the triangular bent portion 14 of the bag body 3 is a, the width is b, the total length of the bag body 3 is H, the width of the bag body 3 is W0, and the width of the belly portion 12. Is W, and the width of the spout attachment part 4a of the spout 4 is W1,
W <b ≦ (W0−W1) / 2
a = b
It has become.

    However, it is not always necessary that a = b, and a and b may be different from each other. Here, the length a of the triangular bent portion 14 is determined from the intersection of the extension line of the upper edge 3a of the bag body 3 and the extension line of the side edge 3c of the bag body 3 with the folding of the side edge 3c of the triangular bent portion 14. The distance to the song start position. The width b of the triangular bent portion 14 is determined by the bending start position of the upper edge 3a of the triangular bent portion 14 from the intersection of the extended line of the upper edge 3a of the bag body 3 and the extended line of the side edge 3c of the bag main body 3. The distance to.

  As shown in FIG. 5, the right triangular bent portion 14 of the pair of triangular bent portions 14, 14 is bent forward, and the left triangular bent portion 14 is bent backward. ing. Further, as described above, the length a and the width b of the triangular bent portions 14 and 14 have large dimensions, whereby the triangular bent portions 14 and 14 also have a large shape.

  Since the triangular bent portions 14 and 14 have a large shape as described above, when the bag body 3 is inserted into the outer container 5, the triangular bent portions 14 and 14 are separated from other portions of the bag main body 3 by the impact. They are pulled apart and do not keep in close contact with other parts of the bag body 3. For this reason, when the nitrogen gas is supplied to the liquid storage container 1 to inflate the bag body 3, the triangular bent portions 14 and 14 can be reliably expanded.

  If the width b of the triangular bent portions 14, 14 is smaller than the width W of the belly portion 12, when the bag body 3 is inserted into the outer container 5, the triangular bent portions 14, 14 are connected to the other portions of the bag main body 3. There is a case where it does not leave the part.

  Further, the maximum width b capable of forming the triangular bent portions 14 and 14 with high accuracy is (W0−W1) / 2, and the triangular bent portions 14 having a width b larger than (W0−W1) / 2, It is difficult to form 14 with high accuracy.

  Further, by folding the right triangular bent part 14 to the near side and the left triangular bent part 14 to the back side of the pair of triangular bent parts 14, 14 of the bag body 3, the liquid storage container 1. When nitrogen gas is supplied to the bag body 3 to inflate, the nitrogen gas can flow to the upper part of the bag body 3 in a well-balanced manner, and the upper part of the bag body 3 can be reliably inflated. That is, when the pair of triangular bent portions 14 and 14 are bent in the same direction, the supplied nitrogen gas cannot sufficiently reach the side of the bag body 3 where the triangular bent portions 14 and 14 are bent. Although it is conceivable, the supplied nitrogen gas can flow to the upper part of the bag body 3 in a well-balanced manner by bending the pair of triangular bent portions 14 and 14 in opposite directions. Moreover, the problem which the bag main body 3 obstruct | occludes the spout 4 by the uneven flow can be prevented.

Further, the width W of the abdomen 12 does not necessarily have to be the same, and the width W of the plurality of abdomen 12 may be different from each other. In that case, the width of the right triangular bent portion 14 of the pair of triangular bent portions 14, 14 of the bag body 3 is b _R, and the right side of the plurality of bellows portions 12 of the bag main body 3. when the rightmost how the 's width of the abdomen 12, including an edge heat-sealed portion 10c was set to _{W R, W R <b R} ≦ (W0-W1) / 2 , and the width of the triangular bent portion 14 of the left b is _L, when the most width of the left way of 's abdomen 12 comprising a side edge heat-sealed portion 10c of the left among the plurality of'm abdomen 12 of the bag body 3 was _{W L, W L <b L} ≦ (W0- W1) / 2 is sufficient.

  Next, the operation of the present embodiment having such a configuration will be described.

  First, a method for housing the liquid container 1 in the outer container 5 will be described with reference to FIGS.

  First, as shown in FIG. 5, the bag body 3 of the liquid storage container 1 has the upper edge 3 a and each side edge 3 c, via a folding line 13 extending between the upper edge 3 a and each side edge 3 c, 3 c. The corner between 3c is bent. In this way, a pair of triangular bent portions 14, 14 are formed in the bag body 3. In this case, the right triangular bent portion 14 is bent toward the front side, and the left triangular bent portion 14 is bent toward the rear side.

  Next, as shown in FIG. 6, the upper part of the bag body 3 of the liquid storage container 1 is folded to the front side via the upper lateral folding line 15a.

  Next, as shown in FIG. 7, the upper part of the bag body 3 folded to the near side is folded back to the back side via the lower lateral folding line 15b. In this way, the folding portion 16 is formed between the upper lateral folding line 15a and the lower lateral direction 15b.

  Thereafter, as shown in FIG. 8, the bag body 3 is folded in the vertical direction along the vertical folding line 11 to form a plurality of belly portions 12. Next, the lower part of the bag body 3 is folded in the horizontal direction to form the bottom folded part 17 (see FIG. 9).

  In this way, as shown in FIG. 9, a liquid storage container in which a plurality of bellows parts 12, folding parts 16, a pair of triangular folding parts 14, 14, and a bottom folding part 17 are formed in the bag body 3. 1 is prepared.

  Next, as shown in FIG. 10A, the liquid storage container 1 is further folded in the vertical direction to be formed in an elongated shape in the vertical direction, and the liquid storage container 1 is inserted into the exterior container 5 from the opening 5a. The

  Next, the spout 4 of the liquid storage container 1 is attached to the opening 5 a of the outer container 5. In this case, the spout engaging portion 4 b of the spout 4 is engaged with the opening 5 a of the outer container 5. In this way, the liquid storage container 1 is stored in the outer container 5 to form a combined body 1A of the outer container and the liquid storage container.

  Next, a liquid filling method will be described.

  First, nitrogen gas is supplied from the spout 4 into the liquid storage container 1 of the combined container 1 </ b> A of the outer container and the liquid storage container, and the bag body 3 of the liquid storage container 1 expands in the outer container 5.

  After the bag body 3 is inflated with nitrogen gas in this manner, a liquid tube (not shown) can be inserted into the liquid storage container 1 from the spout 4 and filled with the content liquid (liquid) via the liquid tube. Thereafter, the content liquid in the liquid storage container 1 is poured out from the spout 4 via the liquid tube. In this case, a suction pump is attached to the other end of the liquid tube having one end inserted into the spout 4, and the content liquid in the liquid storage container 1 can be poured out by the suction of the suction pump. Alternatively, a compressed gas such as compressed air is supplied between the outer container 5 and the liquid storage container 1 through the spout 4, and the liquid storage container 1 is pressed from the outside by this compressed gas, so that the liquid content is supplied to the liquid tube. You may pour through.

  Next, the liquid filling method will be further described below.

  When the liquid storage container 1 is inserted into the outer container 5, the abdomen 12 first expands laterally in the bag body 3 of the liquid storage container 1 due to the impact of inserting the liquid storage container 1 into the outer container 5. Next, the pair of triangular bent portions 14, 14 of the bag body 3 are pulled away from the other parts of the bag body 3. For this reason, the pair of triangular bent portions 14, 14 does not keep in close contact with other portions of the bag body 3. Thereafter, the portion below the folding part 16 of the bag body 3 falls due to its own weight, and the bag body 3 further expands in the outer container 5.

  Next, by supplying nitrogen gas into the liquid storage container 1, the bag body 3 is expanded. Along with this, the bag body 3 folded in a belly shape via the longitudinal folding line 11 is expanded more flatly.

  In this case, since a pair of triangular bent portions 14 and 14 formed by folding through the folding line 13 are formed in the upper portion of the bag main body 3, the nitrogen gas supplied into the bag main body 3 is formed. Flows into the pair of triangular bent portions 14 and 14 and gradually expands the triangular bent portions 14 and 14. For this reason, when the bag main body 3 expands, the corner of the upper edge 3a of the bag main body 3 is not caught by the opening 5a of the outer container 5, and the bag main body 3 is prevented from being damaged. Further, since the pair of triangular bent portions 14 and 14 are bent on the front side and the back side opposite to each other, the nitrogen gas supplied into the bag body 3 flows in a balanced manner in the upper part of the bag body 3, Thereby, a pair of triangular bending parts 14 and 14 can be expanded reliably. Moreover, the problem which the bag main body 3 obstruct | occludes the spout 4 by the uneven flow can be prevented.

  In addition, since the upper edge 3a of the bag body 3 includes the two upper edge heat seal portions 10a, the upper edge 3a can be configured to be softer than the case of including a wide heat seal portion, and the bag body 3 can be made more flexible. It can be smoothly expanded in the outer container 5. Furthermore, since the outer bag 20 of the bag body 3 has an elongation of 300% to 500%, the flexibility of the bag body 3 can be enhanced and the expansion action of the bag body 3 can be easily performed.

  Next, specific examples of the present invention will be described.

(1) The difference in the bag closing frequency in the vicinity of the spout with respect to the folding method of the bag body for the experiment was confirmed.

(2) Bag body size H = 660mm, W0 = 500mm

(3) Experimental method The liquid storage container provided with the bag main body which has a pair of triangular folding part, folding part, and a plurality of bellows parts by Example 1 was prepared.

  Similarly, as a comparative example, a liquid storage container including a bag body having a folding portion and a plurality of bellows portions was prepared (there is no pair of triangular bent portions).

  The liquid storage container according to Example 1 and the liquid storage container as a comparative example are stored in an outer container having an actual internal volume of 20.4 L, which is used as a container that guarantees a capacity of 19 L, and is stored in the liquid storage container. Gas was supplied and the bag body was inflated in the outer container.

  At this time, the frequency of blockage of the spout by the bag body was verified. In the closed state, after inflating, visually inspect the spout through-hole from above the spout, and when the through-hole is completely blocked by the film constituting the bag body, it is defective (x), and when the through-hole is not blocked at all, A case where a portion was blocked was judged as good (◯).

(4) Experimental result In Example 1, it obstruct | occluded completely with the probability of about 20%.

  In the comparative example, it was completely blocked with a probability of about 60%.

The experimental results are shown in Table 1.

Table 2 shows the shape of the bag body in Example 1 and Comparative Example.

(1) Experimental purpose When the bag body was inflated, the openability of the bag body according to how the bag body was folded was evaluated.

(2) Bag body size H = 660mm, W0 = 500mm

(3) Experimental method The liquid storage container provided with the bag main body which has a pair of triangular folding part, a folding part, and a plurality of bellows parts by Example 2-1 to Example 2-3 was prepared, respectively.

These liquid storage containers according to Examples 2-1 to 2-3 are stored in an outer container having an actual volume of 20.4 L, which is used as a container that guarantees a capacity of 19 L, and gas is stored in the liquid storage container. Was supplied and the bag body was inflated in the outer container. Next, the openability of the bag body was evaluated by pouring water into the inflated bag body and measuring the capacity to fill the bag.

(4) Experimental Results (Example 2-1) A pair of triangular bent portions were bent in the same direction at the corner of the upper edge, and then a belly portion was formed. Injection volume 19.4L

(Example 2-2) A pair of triangular bent portions in the opposite direction at the corners of the upper edge, that is, one triangular bent portion of the pair of triangular bent portions is on the near side, and the other triangular bent portion is Was folded inward and then the abdomen was formed. Water injection volume 19.6L
In Example 2-2, the openability was slightly improved as compared to Example 2-1, by bending the pair of triangular bent portions in opposite directions.

(Example 2-3) A pair of triangular bent portions were bent in opposite directions at the corners of the upper edge, further folded portions were formed, and then an abdominal portion was formed. Water injection volume 19.9L
In Example 2-3, since the folding part was further formed, the openability was further improved.

That is, in Example 2-3, since the folding part is further formed, the bag body swells from the upper part, so that the openability of the corner of the upper edge becomes better.

Further, since the folding portion is further formed, it is possible to prevent the lower portion of the bag main body from being bent strangely and the openability from being deteriorated.

Eventually, the water injection amount for Example 2-1 to Example 2-3 is as shown in Table 3 below (n = 3).

In all of Examples 2-1 to 2-3, the spout was not blocked by the bag body.

Table 3 shows how to fold Example 2-1 to Example 2-3 and the amount of water injection. The average water injection amount is a value obtained by averaging the results of three water injection experiments.

(1) Purpose of experiment To confirm the difference in opening of the bag body depending on the folding position of the bag body.

(2) Size of bag body H = 660 mm, W0 = 500 mm, W = 100 mm, a = 200 mm, b = 180 mm

(3) Experimental method A bag body having a pair of triangular bent portions, a folded portion, and a plurality of bellows portions according to Examples 3-1 to 3-2 and Comparative Examples 3-1 to 3-4 was provided. Each liquid container was prepared. The liquid storage containers according to Examples 3-1 to 3-2 and Comparative Examples 3-1 to 3-4 are used as containers that guarantee a capacity of 19 L, as in Examples 2-1 to 2-3. Then, it was housed in an outer container having an actual internal volume of 20.4 L, gas was supplied into the liquid container, and the bag body was inflated in the outer container. Next, water was poured into the inflated bag body, and the capacity to fill the water was measured to evaluate the openability of the bag body.

(4) Experimental results (Examples 3-1 to 3-2)
The capacity in Example 3-1 was 19.9 L, which was a sufficient capacity. However, since there are many folds in the vicinity of the spout provided on the upper side of the bag body, handling when storing the bag in the outer container is somewhat difficult. When X / H and Y / H are reduced more than this, it becomes difficult to store the outer container.

  In Example 3-2, the capacity was 19.5 L, which was a 4.4% decrease in capacity relative to the inner volume (20.4 L) of the outer container. That is, if X / H and Y / H are made larger than this, the fall of the part below the folding part of the bag body in the outer container due to its own weight will not be ensured, resulting in poor openability and securing sufficient capacity. Becomes difficult.

(Comparative Examples 3-1 to 3-4)
The capacity in Comparative Example 3-1 was 19.0 L, a decrease in capacity of 6.9% with respect to the internal volume (20.4 L) of the outer container, and the capacity may be 19 L or less. It was. That is, it cannot be said that a sufficient capacity can be secured.

  The capacities in Comparative Examples 3-2 to 3-3 are 17.9 L and 18.9 L, respectively, with a capacity reduction of 12.3% and 7.4% with respect to the internal volume (20.4 L) of the outer container. It is clear that sufficient capacity is not secured.

  The capacity in Comparative Example 3-4 was 19.1 L, a decrease in capacity of 6.4% with respect to the inner volume (20.4 L) of the outer container. However, the capacity may be 19 L or less. It was. That is, it cannot be said that a sufficient capacity can be secured.

  In this way, when the bag is folded so as not to satisfy 10% <X / H <50%, 3% <Y / H <25%, the opening of the bag is poor and the amount of water injection that can reliably satisfy 19L is It was not obtained.

  As another comparative example, when X is too small, the amount of bending is small, so that sufficient X and Y cannot be secured. Problems arise in handling such as the storage form is not compact and the folded state cannot be maintained.

  Further, as another comparative example, when Y is too small, sufficient Y cannot be secured, so that it is difficult to bend, the storage form is not compact, and the handleability such as the folded state cannot be maintained occurs.

The experimental results for Examples 3-1 to 3-2 and Comparative Examples 3-1 to 3-4 are as shown in Table 4 below. The average water injection amount is a value obtained by averaging the results of three water injection experiments.

DESCRIPTION OF SYMBOLS 1 Liquid container 1A Outer container and fluid container combination 3 Bag body 3a Upper edge 3b Bottom edge 3c Side edge 4 Outlet 4a Outlet attachment part 4b Outlet engagement part 5 Outer container 10 Heat seal part 10a Upper edge Heat seal portion 10b Bottom edge heat seal portion 10c Side edge heat seal portion 11 Longitudinal fold curve 12 Javel 13 fold curve 14 Triangular fold portion 15a Upper lateral fold curve 15b Lower lateral fold curve 16 Fold portion 17 Bottom fold portion 20 Outer bag 21 Inner bag H Total height X of the bag body Length Y between the upper edge and the lower lateral fold curve Length a between the upper lateral fold curve and the lower lateral fold curve a Height b Width of triangle bent part W Width of abdomen W0 Width of bag body W1 Width of spout attachment part

Claims (8)

In a liquid storage container stored in an exterior container having an opening,
A bag body having a shape having an upper edge, a bottom edge and two side edges;
A spout attachment part attached to the upper edge of the bag body and a spout attached to and detached from the opening of the outer container;
By bending the corner between the upper edge and each side edge of the bag body, a pair of bent portions are formed,
The bag body has a plurality of bellows folded through longitudinal folding lines extending in the longitudinal direction,
When the width of the bag body is W0, the width of the spout attachment portion of the spout is W1, the width of the bellows is W, and the width of each bent portion is b,
W <b ≦ (W0−W1) / 2
A liquid container characterized by:   The liquid container according to claim 1, wherein one of the pair of bent portions is bent toward the front side, and the other bent portion is bent toward the back side. The bag body has a folded portion that is folded via an upper lateral folding line and a lower lateral folding line,
When the total length of the bag body is H, the length between the upper edge and the lower lateral folding curve is X, and the length between the upper lateral folding curve and the lower lateral folding curve is Y ,
10% <X / H <50%, 3% <Y / H <25%, X ≧ Y
The liquid storage container according to claim 1, wherein:   The liquid container according to any one of claims 1 to 3, wherein the upper edge of the bag body includes two heat seal portions, and the bottom edge and the two side edges include one heat seal portion. An exterior container having an opening;
A bag main body housed in the outer container and having a shape having an upper edge, a bottom edge, and two side edges, and a spout attachment portion attached to the upper edge of the bag main body, and attached to and detached from the opening of the outer container A pair of bent portions is formed by bending a corner between the upper edge and each side edge of the bag body, and the bag body extends in the longitudinal direction. It has a plurality of bellows parts folded through a folding line, the width of the bag body is W0, the width of the spout attachment part of the spout is W1, the width of the belly part is W, When the width of each bent part is b,
W <b ≦ (W0−W1) / 2
A liquid storage container,
A combination of an outer container and a liquid container characterized by comprising: Preparing a liquid container having a bag body having a shape having an upper edge, a bottom edge, and two side edges, and a spout having a spout attachment portion attached to the top edge of the bag body;
A step of forming a pair of bent portions by bending a corner portion between the upper edge and each side edge of the bag body;
Forming a plurality of bellows by folding the bag body through a longitudinal folding line extending in the longitudinal direction;
Storing the liquid storage container from the bottom edge side of the bag body into the exterior container through the opening, and attaching a spout of the bag body to the opening of the exterior container,
When the width of the bag body is W0, the width of the spout attachment portion of the spout is W1, the width of the bellows is W, and the width of each bent portion is b,
W <b ≦ (W0−W1) / 2
A storage method for a liquid storage container. An exterior container having an opening;
A bag main body housed in the outer container and having a shape having an upper edge, a bottom edge, and two side edges, and a spout attachment portion attached to the upper edge of the bag main body, and attached to and detached from the opening of the outer container A pair of bent portions is formed by bending a corner between the upper edge and each side edge of the bag body, and the bag body extends in the longitudinal direction. It has a plurality of bellows parts folded through a folding line, the width of the bag body is W0, the width of the spout attachment part of the spout is W1, the width of the belly part is W, When the width of each bent part is b,
W <b ≦ (W0−W1) / 2
A liquid storage container,
In a liquid filling method using a combination of an outer container and a liquid storage container,
Supplying gas into the bag body from the spout of the liquid storage container to inflate the bag body in the outer container; and
And a step of filling the bag body with the liquid from the spout. An exterior container having an opening;
A bag main body housed in the outer container and having a shape having an upper edge, a bottom edge, and two side edges, and a spout attachment portion attached to the upper edge of the bag main body, and attached to and detached from the opening of the outer container A pair of bent portions is formed by bending a corner between the upper edge and each side edge of the bag body, and the bag body extends in the longitudinal direction. It has a plurality of bellows parts folded through a folding line, the width of the bag body is W0, the width of the spout attachment part of the spout is W1, the width of the belly part is W, When the width of each bent part is b,
W <b ≦ (W0−W1) / 2
A liquid storage container,
In a liquid dispensing method using a combination of an outer container and a liquid storage container,
A liquid pouring method comprising a step of pouring the liquid filled in the bag body from the pouring port.

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