JP6780273B2 - Spout, liquid storage container and combination of liquid storage container and outer container - Google Patents

Description

The present invention relates to a spout, a liquid storage container, and a combination of a liquid storage container and an outer container, and is provided for storage and transportation of fluid contents, especially in the fields of industrial chemicals, pharmaceuticals, and raw materials for cosmetics. , Liquid storage container and combination of liquid storage container and outer container.

Conventionally, in the fields of industrial chemicals, pharmaceuticals, cosmetic raw materials, etc., liquid storage containers that are placed inside outer containers made of aluminum, steel, stainless steel, fiberboard, etc. for storage and transportation and store fluid contents have been used. in use.

Such a liquid storage container can be reused simply by removing the used liquid storage container from the outer container and setting a new liquid storage container in the outer container. Therefore, for example, a liquid storage container is used. Compared to directly filling an outer container such as steel with fluid contents, it has the advantage of saving the trouble of cleaning, and is widely used as a container for industrial chemicals, pharmaceuticals, and cosmetic raw materials. ..

Further, as a liquid storage container, a container having a bag main body and a spout attached to the bag main body is known. Such a liquid storage container is first compactly folded and inserted into the outer container through the opening of the outer container.

By the way, the spout is attached by being joined to the bag body, and such a spout has a spout body and a joint portion joined to the bag body. Technology for reliably joining the joint to the bag body is required for the spout having such a configuration, but a spout and a liquid storage container having a joint that can be reliably joined to the bag body have been developed. The reality is that it has not been done.

Japanese Unexamined Patent Publication No. 2013-107655 Japanese Patent No. 5,390,318

The present invention has been made in consideration of such a point, and an object of the present invention is to provide a spout, a liquid storage container, and a combination of a liquid storage container and an outer container that can be reliably joined to the bag body. And.

The present invention includes a spout main body connected to the bag main body and a joint portion connected to the spout main body and joined to the bag main body, and the joint portion is formed on the outer surface thereof. It has at least one groove, one end of the groove communicates in a direction different from the direction connecting the inside of the bag body and the outside of the bag body, and the other end of the groove is the inside of the bag body or the bag body. It is a spout that communicates with any one of the outer sides, and the one end portion and the other end portion do not communicate with each other of the inside of the bag body and the outside of the bag body.

In the present invention, the outer peripheral edge of the joint portion has a polygonal shape when viewed from the normal direction of the bag body, one end of the groove communicates with one side of the joint portion, and the other end of the groove is the bag. It may be a spout that communicates with either the inside of the main body or the outside of the bag main body.

In the present invention, the outer peripheral edge of the joint may be a spout having a rectangular shape when viewed from the normal direction of the bag body.

In the present invention, the joint portion may be a spout that is joined to the upper edge of the bag body.

In the present invention, the groove has a groove line and a branch portion branching from the groove line, the groove line includes the one end portion and the other end portion, and the branch portion stays in the joint portion. It may be a characteristic spout.

In the present invention, the groove has a groove line and a closed shape region continuous with the groove line, the groove line includes the one end portion and the other end portion, and the closed shape region remains in the joint portion. It may be a spout characterized by this.

In the present invention, the joint portion has an additional groove formed on the outer surface thereof, and at least one of one end and the other end of the additional groove is in a direction different from the direction connecting the inside of the bag body and the outside of the bag body. It may be a spout characterized by communicating with.

The present invention includes a bag main body and an spout to be joined to the bag main body, and the spout has a spout main body and a joint portion connected to the spout main body and joined to the bag main body. The joint portion has at least one groove formed on the outer surface thereof, and one end of the groove communicates in a direction different from the direction connecting the inside of the bag body and the outside of the bag body, and the groove The liquid storage container is characterized in that the other end portion communicates with either the inside of the bag body or the outside of the bag body.

The present invention may be a liquid storage container characterized in that the spout is directly attached to an outer container having an opening, and the spout has a flange that engages with the opening.

The present invention may be a liquid storage container characterized in that the spout is attached to an outer container having an opening via a holder, and the spout has a flange that engages with the holder. ..

The present invention includes an outer container and a liquid storage container housed in the outer container, and the liquid storage container includes a bag main body and a spout to be joined to the bag main body. , The spout main body and a joint portion connected to the spout main body and joined to the bag main body are provided, and the joint portion has at least one groove formed on the outer surface of the joint portion of the groove. One end communicates in a direction different from the direction connecting the inside of the bag body and the outside of the bag body, and the other end of the groove communicates with either the inside of the bag body or the outside of the bag body. It is a combination of a liquid storage container and an outer container, characterized in that the other end portion does not communicate with the inside of the bag body and the outside of the bag body, respectively.

As described above, according to the present invention, the joint portion of the spout can be reliably joined to the bag body. Further, according to the combination of the liquid storage container and the outer container of the present invention, the joint portion of the spout is surely joined to the bag body while the liquid storage container is supported in the outer container. The liquid storage container has a large content and can sufficiently withstand the load even when the load of the contents is heavily applied to the bag body.

FIG. 1 is a plan view showing a liquid storage container according to the present invention. FIG. 2 is a perspective view showing a spout. FIG. 3 is a side view showing the spout. FIG. 4 is a plan view showing the spout. FIG. 5 is a bottom view showing the spout. FIG. 6 is a perspective view showing a combination of the spout and the holder. FIG. 7 is a side sectional view showing a combination of the spout and the holder. FIG. 8 is a diagram showing a state in which the liquid storage container is inserted into the outer container. FIG. 9 is a cross-sectional view showing the layer structure of the bag body of the liquid storage container. 10 (a) is a plan view showing the holder, and FIG. 10 (b) is a side view thereof. 11 (a), (b), (c), (d), (e), and (f) are views showing a configuration example of a spout joint. FIG. 12 is a diagram showing a configuration example of a joint portion of a spout. FIG. 13 is a diagram showing a configuration example of a joint portion of the spout. FIG. 14 is a diagram showing a configuration example of a joint portion of a spout. FIG. 15 is a diagram showing a configuration example of a joint portion of a spout. 16 (a), (b), (c), (d), (e), (f), (g), (h), (i), and (j) are diagrams showing a configuration example of a spout joint. 17 (a), (b), (c), and (d) are views showing a configuration example of a spout joint. FIG. 18 is a diagram showing a configuration example of a joint portion of a spout. 19 (a), (b), (c), and (d) are views showing a configuration example of a joint portion of a spout. FIG. 20 is a diagram showing a configuration example of a joint portion of a spout. 21 (a), (b) and (c) are views showing a configuration example of a joint portion of a spout. 22 (a), (b), (c), and (d) are views showing a configuration example of the joint portion of the spout. 23 (a) and 23 (b) are views showing a configuration example of a joint portion of a spout. 24 (a), (b), and (c) are views showing a configuration example of the joint portion of the spout. FIG. 25 is a diagram showing a liquid storage container according to a modified example of the present invention. FIG. 26 is a front view showing a liquid storage container according to another modification of the present invention. FIG. 27 (a) is an enlarged view showing a liquid storage container according to another modification of the present invention, and FIG. 27 (b) is an enlarged view showing a liquid storage container according to still another modification. FIG. 28A is a bottom view showing a liquid storage container according to another modification of the present invention, and FIG. 28B is a bottom view showing a liquid storage container according to still another modification.

<Embodiment of the present invention>
Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Here, FIGS. 1 to 25 are diagrams showing embodiments of the present invention.

First, the liquid storage container 1 of FIG. 1 will be described.
The liquid storage container 1 is formed by stacking a triple multi-layer film 2 in which an outer bag 20 and a double inner bag 21 are overlapped so that the inner bags 21 face each other to form a total of six sheets, and heat the four sides thereof. It is provided with a bag body 3 formed by sealing (welding, particularly heat welding) to form a heat-sealed portion 10, and a spout 40 arranged on the upper edge 3a of the bag body 3 and preliminarily joined between the inner bags 21. .. In this case, the spout 40 is joined and welded by a joining means such as adhesion or welding.

In the present embodiment, the bag body 3 is obtained by laminating the multilayer films 2 so that the inner bags 21 face each other and heat-sealing the four sides to form the heat-sealing portion 10. The present invention is not limited, and for example, the multilayer film 2 may be formed by bending the inner bags 21 so that the inner bags 21 face each other and then heat-sealing the three overlapping outer peripheral sides. Further, each of the inner edges of the heat seal portion 10 may be formed so that the inner edges thereof are arcuate. As a result, the structure is such that the fluid contents are unlikely to remain at the corners. Further, the bag body does not necessarily have to be composed of multiple films, and the film structure of the bag body 3 can be appropriately selected according to the contents and the amount. In the bag body 3, the double multilayer 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 form a total of four sheets, and the four sides thereof are heat-sealed. It may be a double bag or a triple bag which is the bag body 3 on which the heat seal portion 10 is formed. When the content is large and the load of the contents is large on the bag body, the triple bag is used to withstand the load. Is preferable.

In the present embodiment, an example is shown in which the bag body 3 is formed by superimposing two multiplex films, but the present invention is not limited to this, and two films are prepared and four sides are heat-sealed. It is also possible to form the bag body 3 with a single-layer film by folding back one film and heat-sealing the three sides.

As described above, the bag body 3 is obtained by superimposing two multilayer films 2 and heat-sealing the peripheral edge to form the heat-sealing 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 and 3c. Further, the upper edge 3a includes one upper edge heat seal portion 10a, the bottom edge 3b includes one bottom edge heat seal portion 10b, and each side edge 3c and 3c includes one side edge heat seal portion 10c. The heat seal portion 10 is composed of the upper edge heat seal portion 10a, the bottom edge heat seal portion 10b, and the side edge heat seal portion 10c.

Further, in the present embodiment, the upper edge 3a of the bag body 3 includes one upper edge heat-sealing portion 10a as described above, but two or more heat-sealing portions may be formed on the upper edge 3a. .. For example, as in the modified example shown in FIG. 25, by dividing the heat-sealing portion 10a of the upper edge 3a into two, for example, one heat-sealing portion having the width of two heat-sealing portions 10a on the upper edge 3a. The upper edge 3a can be formed to be relatively soft as compared with the case of forming.

Further, the spout 40 has a joint portion 50 welded to the upper edge 3a of the bag main body 3 and a spout main body 41 that is connected to the joint portion 50 and projects outward from the bag main body 3. A spout flange 42 is provided at the upper end of the 41. Further, as shown in FIG. 1, the spout 40 is welded between the inner bags 21 of the multilayer film 2 at the joint portion 50. A groove 100 is formed in the joint portion 50 as described later, and the groove 100 can reliably weld the joint portion 50 to the inner bag 21. In the present embodiment, the load due to the load of the content liquid is evenly applied to the two multilayer films 2 and is applied to the entire joint portion 50. Therefore, it is possible to prevent the liquid storage container 1 from being damaged. Further, since the overall shape of the liquid storage container 1 becomes symmetrical, the bag body 3 can be uniformly inflated in the outer container.

As shown in FIGS. 2 to 7, the joint portion 50 of the spout 40 is formed from an elliptical cylinder having a central portion 51 and a thin portion 52 provided on both sides of the central portion 51 and having a thickness thinner than that of the central portion 51. It is flat and has a through hole 45 in the central portion 51. Normally, when the spout 40 is welded between the inner bags 21 of the multilayer film 2 at the joint portion 50, a gap is formed between the inner bags 21 and the two regions surrounded by the ends of the joint portion 50, which tends to cause poor sealing. .. In order to prevent this, thin-walled portions 52 are provided on both sides, and the thin-walled portions 52 are melted at the time of welding to prevent the formation of gaps.

The spout main body 41 of the spout 40 is formed of a tubular body having a substantially U-shaped cross section, and a spout flange 42 is provided on the upper peripheral edge thereof. An opening 44 is formed in the bottom 43 of the spout main body 41. By the opening 44, ventilation can be ensured between the liquid storage container 1 and the outer container 5 (see FIG. 8) described later, and when the content liquid is pumped out during use, the liquid storage container is pumped through the opening 44. It is possible to introduce a gas between 1 and the outer container 5 and apply atmospheric pressure from the outside of the liquid storage container 1 to smoothly pump out the content liquid inside the liquid storage container 1. Further, the bottom portion 43 in the spout main body 41 is provided with a spout upper member 70 extending in the vertical direction.

The spout flange 42 of the spout 40 is attached to the opening 5a formed in the outer container 5 via a holder 80 described later, and the liquid storage container 1 is supported in the outer container 5. The spout flange 42 of the spout 40 may be directly attached to the opening 5a of the outer bag container 5 without passing through the holder 80.

The spout 40 is preferably manufactured by an injection molding method. The resin used for this is not particularly limited as long as it is an injection-moldable resin, but the inner surface of the inner bag 21 is bonded to the resin constituting the inner surface of the inner bag 21 of the multilayer film 2 by welding. Although it is necessary to appropriately select the resin depending on the constituent resin, high-density polyethylene, which is usually rigid even at a high temperature and is not easily brittle at a low temperature, is preferable.

FIG. 9 is a schematic cross-sectional view showing the layer structure of the multilayer film 2 constituting the bag body 3. As shown in FIG. 9, the multilayer film 2 of the present embodiment has an outer bag 20 having a three-layer structure of an unstretched nylon layer 20a, a gas barrier layer 20b, and a polyethylene layer 20c in order from the outside of the bag body 3. It is composed of two inner bags 21 and 21 made of linear low-density polyethylene. If the fluid content to be used does not require gas barrier properties, a two-layer structure in which the gas barrier layer 20b is omitted may be used.

In this case, since the outer bag 20 contains the unstretched nylon layer 20a, the degree of elongation of the outer bag 20 can be increased. For example, the outer bag 20 has an degree of elongation of 300% to 500%. Since the outer bag 20 can have a high degree of elongation in this way, the bag body 3 can be made soft as a whole, and the bag body 3 is inserted into the outer container 5 as described later, and the bag body 3 is inserted. When the bag body 3 is inflated in the outer container by supplying normal air, nitrogen gas, or clean dry air to the inside, the bag body 3 can be inflated smoothly.
The material of the bag body 3 is not limited to the above-mentioned material.

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

The material of the outer bag 20 is one having an elongation of 300% to 500%, for example, low density polyethylene, linear low density polyethylene, a mixture of low density polyethylene and linear low density polyethylene, low density polyethylene and direct A material such as a laminate of chain low density polyethylene can be used.

By the way, as described above, the spout flange 42 of the spout 40 is attached to the opening 5a of the outer container 5 via the holder 80. The holder 80 is interposed between the opening 5a and the spout 40, and even if the shape of the opening 5a of the outer container 5 is slightly larger than the outer shape of the spout flange 42, the spout 40 is inserted into the opening 5a. It works to ensure that it is installed.

Next, the holder 80 will be described in detail.
The holder 80 includes an outer flange 81 that engages with the opening 5a of the outer container 5 and an inner flange 82 that is connected to the outer flange 81 via a connecting step 83 and engages with the spout flange 42 of the spout 40. It has a ring shape having an opening 80a as a whole.

The inner flange 82 of the holder 80 has a ring shape forming an opening 80a, and its inner diameter is a1. Further, the inner flange 82 is provided with a pair of notches 85 and 85 facing each other on a straight line passing through the center thereof, and the inner diameter of the inner flange 82 passing through the notches 85 and 85 is a2 (FIG. 10).

Therefore, as shown in FIG. 10, the minimum inner diameter of the inner flange 82 is a1 and the maximum inner diameter is a2.

The holder 80 configured in this way is attached to the spout 40 of the liquid storage container 1. In this case, the spout flange 42 of the spout 40 has a ring shape (circular shape). Therefore, the maximum outer diameter b1 and the minimum outer diameter b2 of the spout flange 42 are equal to each other.

Next, the relationship between the minimum inner diameter a1 and the maximum inner diameter a2 of the inner flange 82 of the holder 80 and the maximum outer diameter b1 and the minimum outer diameter b2 of the spout flange 42 of the spout 40 will be described.

The maximum inner diameter a2 of the inner flange 82 is larger than the minimum outer diameter b2 of the spout flange 42, and a2> b2.

Further, the minimum inner diameter a1 of the inner flange 82 is smaller than the maximum outer diameter b1 of the spout flange 42, and a1 <b1.

Since a2> b2 in this way, the spout flange 42 can pass through the space extending between the pair of notches 85 of the holder 80. Further, since a1 <b1, the spout flange 42 that has passed between the pair of notches 85 of the holder 80 can be locked to the inner flange 82 of the holder 80.

By the way, the minimum inner diameter a1 and the maximum inner diameter a2 of the inner flange 82 of the holder 80 and the maximum outer diameter b1 and the minimum inner diameter b2 of the spout flange 42 of the spout 40 can also be defined as follows.

That is, the minimum inner diameter a1 of the inner flange 82 of the holder 80 is the minimum length of a straight line connecting two facing points of the inner edges 82A of the inner flange 82, and the maximum inner diameter a2 of the inner flange 82 of the holder 80 is. It is the maximum length of a straight line connecting two facing points of the inner edge 82A of the inner flange 82.

Further, the maximum outer diameter b1 of the spout flange 42 of the spout 40 is the maximum length of a straight line connecting two facing points of the outer edges 42A of the spout flange 42, and the minimum of the spout flange 42 of the spout 40. The outer diameter b2 is the minimum length of a straight line connecting two facing points of the outer edge 42A of the spout flange 42.

Here, the "between two facing points" defining the above a2 and b2 means that the spout flange 42 smoothly passes through the space inside the holder 80 by utilizing the space between the two facing points.

The “between two facing points” defining the above a1 and b1 means that the spout flange 42 can be engaged with the inner flange 82 of the holder 80 by utilizing the space between the two facing points.

By the way, as shown in FIG. 2, in the present embodiment, the spout 40 has a spout main body 41 and a joint portion 50 connected to the spout main body 41 as described above. The outer peripheral edge of the portion 50 has a rectangular shape having an upper edge 50a, a lower edge 50b, and a pair of side edges 50c and 50d when viewed from the normal direction of the bag body 3, and at least one formed on the outer surface. It has a book groove 100 (see FIG. 11A). When the joint portion 50 of the spout 40 is welded to the bag body 3, the groove 100 improves the heat seal strength and releases air between the joint portion 50 and the bag body 3 to improve the sealing performance. It is a thing.
Here, the outer surface of the joint portion 50 means the surface welded to the bag body 3. Further, the normal direction of the bag main body 3 means a direction orthogonal to the bag main body 3 which is uniquely determined with respect to the bag main body 3 formed in a planar shape.

As shown in FIG. 11A, the groove 100 formed in the joint portion 50 is composed of a groove line (hereinafter, also referred to as a line) 111, and the groove line 111 is one end portion communicating with the upper edge 50a of the joint portion 50. It has 100a and the other end 100b communicating with the left edge 50c adjacent to the upper edge 50a.

Since the groove wire 111 of the groove 100 has one end 100a communicating with the upper edge 50a and the other end 100b communicating with the left edge 50c, for example, the spout 40 is welded to the upper edge 3a of the bag body 3. At this time, the air remaining between the spout 40 and the bag body 3 can escape outward from the one end 100a and the other end 100b. Therefore, no air remains between the spout 40 and the bag body 3, and the spout 40 can be reliably welded and attached to the bag body 3. In FIG. 11A, the upper edge 50a and the lower edge 50b of the joint portion 50 connect the liquid flow direction from the inside of the bag body 3 toward the spout body 41, that is, the inside of the bag body 3 and the outside of the bag body 3. It intersects the direction, and the left edge 50c and the right edge 50d of the joint are along the liquid flow direction.

In this case, since the groove 100 includes a plurality of different directions, the heat seal strength in the plurality of directions can be improved. Further, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. This is formed so that the end of the groove 100 does not communicate with the lower edge 50b inside the bag body 3, but the groove 100 communicates with the lower edge 50b and the upper edge 50a inside the bag body 3. Because there is no.

Next, a modified example of the groove 100 formed in the joint portion 50 will be described below.
In the embodiment shown in FIG. 11A, an example is shown in which the groove 100 has one end portion 100a communicating with the upper edge 50a of the joint portion 50 and the other end portion 100b communicating with the left side edge 50c. However, one end 100a of the groove 100 of the joint portion 50 may communicate with the upper edge 50a, and the other end 100b may communicate with the right edge 50d (see FIG. 11B).

In this case, since the groove 100 includes a plurality of different directions, the heat seal strength in the plurality of directions can be improved. Further, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50d along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. This is formed so that the end of the groove 100 does not communicate with the lower edge 50b inside the bag body 3, but the groove 100 communicates with the lower edge 50b and the upper edge 50a inside the bag body 3. Because there is no.

Alternatively, as shown in FIG. 11C, one end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, the other end 100b of the groove 100 communicates with the right edge 50d, and the groove of the groove 100. The wire 111 may further extend to the left edge 50c, and the extended end 100c of the groove wire 111 may communicate with the left edge 50c.

In this case, since the groove line 111 connecting any two of the one end 100a, the other end 100b, and the end 100c of the groove 100 does not communicate with the edges 50a and 50b that intersect in the liquid flow direction. It is possible to prevent the liquid from leaking through the groove 100. That is, since there is no groove 100 that communicates the upper edge 50a and the lower edge 50b, it is possible to prevent the liquid from leaking.

Alternatively, as shown in FIG. 11D, even if the groove 100 of the joint portion 50 has one end portion 100a communicating with the lower edge 50b of the joint portion 50 and the other end portion 100b communicating with the left side edge 50c. Good.

Alternatively, as shown in FIG. 11E, the groove 100 of the joint portion 50 may have one end portion 100a communicating with the lower edge 50b of the joint portion 50 and the other end portion 100b communicating with the right side edge 50d. ..

In this case, since the groove 100 includes a plurality of different directions, the heat seal strength in the plurality of directions can be improved. Further, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50d along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. This is so that the end of the groove 100 does not communicate with the upper edge 50a on the side in contact with the outside of the bag body 3, and the groove 100 communicates with the lower edge 50b and the upper edge 50a on the inside of the bag body 3. This is because it is not formed.

Alternatively, as shown in FIG. 11 (f), the groove 100 of the joint portion 50 has one end portion 100a communicating with the lower edge 50b of the joint portion 50 and the other end portion 100b communicating with the right edge 50d, and the groove. The wire 111 may further extend to the left edge 50c, and the extended end 100c of the groove wire 111 may communicate with the left edge 50c.

In this case, since the groove line 111 connecting any two of the one end 100a, the other end 100b, and the end 100c of the groove 100 does not communicate with the edges 50a and 50b that intersect in the liquid flow direction. It is possible to prevent the liquid from leaking through the groove 100. That is, since there is no groove 100 that communicates the upper edge 50a and the lower edge 50b, it is possible to prevent the liquid from leaking. As described above, in FIGS. 11A to 11F, the groove 100 has a plurality of different directions having a curved portion, but the curved portion is not limited to a right angle and may be an acute angle, an obtuse angle, or a rounded portion. ..

Alternatively, as shown in FIG. 12, two grooves 100 are provided in the joint portion 50. In FIG. 12, the first groove 100 has one end portion 100a communicating with the upper edge 50a of the joint portion 50 and the other end portion 100b communicating with the right side edge 50d, and the groove line 111 further extends to the left side edge 50c. One end 100a that extends and the extended end 100c of the groove wire 111 communicates with the left edge 50c, and the second groove communicates with the lower edge 50b of the joint 50, and the other end that communicates with the right edge 50d. It has 100b, and the groove line 111 further extends to the left side edge 50c, and the extended end portion 100c of the groove line 111 communicates with the left side edge 50c.

In this case, in any of the two grooves 100, the groove line 111 connecting any two of the end portion 100a, the other end portion 100b, and the end portion 100c intersects with the edge 50a where the liquid flow direction intersects. Since it does not communicate with the 50b, it is possible to prevent the liquid from leaking through the groove 100. That is, since there is no groove 100 that communicates the upper edge 50a and the lower edge 50b, it is possible to prevent the liquid from leaking.

Alternatively, as shown in FIG. 13, the joint portion 50 is provided with three grooves 100. Each groove 100 has an end portion 100a communicating with the lower edge 50b and an other end portion 100b communicating with the left edge 50c. Further, among the three grooves 100, the groove line 111 of the uppermost groove 100 further extends to the right side edge 50d, and the extended end portion 100c of the groove line 111 communicates with the right side edge 50d.

In this case, in any of the three grooves 100, the groove lines 111 connecting any two of the one end 100a, the other end 100b, and the end 100c of the groove 100 intersect in the liquid flow direction. Since the edges 50a and 50b do not communicate with each other, it is possible to prevent the liquid from leaking through the groove 100. That is, since there is no groove 100 that communicates the upper edge 50a and the lower edge 50b, it is possible to prevent the liquid from leaking.

Alternatively, as shown in FIG. 14, the joint portion 50 is provided with four grooves 100. Each groove 100 has an end portion 100a communicating with the upper edge 50a and an other end portion 100b communicating with the left edge 50c.

In this case, since the groove 100 includes a plurality of different directions, the heat seal strength in the plurality of directions can be improved. Further, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. This is formed so that the end of the groove 100 does not communicate with the lower edge 50b inside the bag body 3, but the groove 100 communicates with the lower edge 50b and the upper edge 50a inside the bag body 3. Because there is no.

Alternatively, as shown in FIG. 15, four grooves 100 are provided in the joint portion 50. Of these, the upper left groove 100 has one end 100a communicating with the upper edge 50a and the other end 100b communicating with the left edge 50c, and the lower left groove 100 has one end 100a communicating with the lower edge 50b and the left side. It has an other end 100b that communicates with the edge 50c. Further, the upper right groove 100 has one end 100a communicating with the upper edge 50a and the other end 100b communicating with the right edge 50d, and the lower right groove 100 has one end 100a communicating with the lower edge 50b and the right edge. It has an other end 100b communicating with 50d.

In this case, since the groove 100 includes a plurality of different directions, the heat seal strength in the plurality of directions can be improved. Further, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edges 50c and 50d along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. .. That is, since there is no groove 100 that communicates the upper edge 50a and the lower edge 50b, it is possible to prevent the liquid from leaking.

Alternatively, as shown in FIG. 16A, the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, branch lines (branch portions) 112 extending toward the upper edge 50a side are branched from a plurality of locations of the groove lines 111 of the groove 100, and each branch line 112 is joined without communicating with the edge of the joint portion 50. It stays in the part 50.

In this case, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. ..

Alternatively, as shown in FIG. 16B, the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, branch lines (branch portions) 112 extending toward the left edge 50c side are branched from a plurality of locations of the groove lines 111 of the groove 100, and each branch line 112 is joined without communicating with the edge of the joint portion 50. It stays in the part 50.

In this case, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. ..

Alternatively, as shown in FIG. 16C, the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, branch lines (branch portions) 112 extending toward the lower edge 50b side are branched from a plurality of locations of the groove lines 111 of the groove 100, and each branch line 112 is joined without communicating with the edge of the joint portion 50. It stays in the part 50.

In this case, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. ..

Alternatively, as shown in FIG. 16D, the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, branch lines (branch portions) 112 extending toward the right edge 50d side are branched from a plurality of locations of the groove lines 111 of the groove 100, and each branch line 112 is joined without communicating with the edge of the joint portion 50. It stays in the part 50.

In this case, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. ..

Alternatively, as shown in FIG. 16E, the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, branch lines (branch portions) 112 extending toward the upper edge 50a side are branched from a plurality of locations of the groove lines 111 of the groove 100, and each branch line 112 is bent toward the left edge 50c side to form a joint portion 50. It remains within the joint 50 without communicating with the edges.

In this case, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. ..

Alternatively, as shown in FIG. 16 (f), the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, branch lines (branch portions) 112 extending toward the left side edge 50c side are branched from a plurality of groove lines 111 of the groove 100, and each branch line 112 is a corner between the upper edge 50a and the left side edge 50c. It stays in the joint 50 without bending in the direction of the portion and communicating with the edge of the joint 50.

In this case, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. ..

Alternatively, as shown in FIG. 16 (g), the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, a pair of branch lines (branch portions) 112 extending from a plurality of locations of the groove lines 111 of the groove 100 toward the upper edge 50a side and branching at an angle with respect to the upper edge 50a are provided, and each branch is provided. The wire 112 stays within the joint 50 without communicating with the edge of the joint 50.

In this case, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. ..

Alternatively, as shown in FIG. 16H, the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, a pair of branch lines (branch portions) 112 extending from a certain point of the groove line 111 of the groove 100 toward the left side edge 50c side and diverging with respect to the left side edge 50c are provided, and each branch is provided. The wire 112 remains within the joint 50 without communicating with the edge of the joint 50.

In this case, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. ..

Alternatively, as shown in FIG. 16 (i), the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, branch lines (branch portions) 112 extending from a plurality of locations of the groove lines 111 of the groove 100 toward the upper edge 50a side and the lower edge 50b side are provided, and each branch line 112 communicates with the edge of the joint portion 50. It stays in the joint 50 without doing anything.

In this case, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. ..

Alternatively, as shown in FIG. 16 (j), the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, branch lines (branch portions) 112 extending toward the left edge 50c side and the right edge 50d side are branched from a plurality of groove lines 111 of the groove 100, and each branch line 112 communicates with the edge of the joint portion 50. It stays in the joint 50 without doing anything.

In this case, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. ..

As described above, in FIGS. 16A to 16J, since the branch line 112 stays in the joint portion 50, it is possible to prevent the liquid from leaking through the branch line 112. Since the groove length can be increased by adding the branch line 112, the heat seal strength can be improved. By adding the branch line 112 in a different direction, the heat seal strength in a different direction can be further improved.

Alternatively, as shown in FIG. 17A, the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, a closed shape region 113 continuous with the groove line 111 is provided in the groove 100, and the closed shape region 113 is provided on the upper edge 50a side of the groove line 111. Here, the closed shape region 113 refers to a region surrounded by a groove line and having a closed shape.

In this case, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. ..

Alternatively, as shown in FIG. 17B, the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, a closed shape region 113 continuous with the groove line 111 is provided in the groove 100, and the closed shape region 113 is provided on the lower edge 50b side of the groove line 111.

In this case, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. ..

Alternatively, as shown in FIG. 17C, the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, a plurality of closed shape regions 113 continuous with the groove line 111 are provided in the groove 100, and the closed shape region 113 is provided on the upper edge 50a side of the groove line 111.

In this case, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. ..

Alternatively, as shown in FIG. 17D, the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, a plurality of closed shape regions 113 continuous with the groove line 111 are provided in the groove 100, and the closed shape region 113 is provided on the lower edge 50b side of the groove line 111.

In this case, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. ..

As described above, in FIGS. 17A to 17D, since the closed shape region 113 stays in the joint portion 50, it is possible to prevent the liquid from leaking through the closed shape region 113. Further, since the groove length can be increased by adding the closed shape region 113, the heat seal strength can be improved. By adding the closed shape region 113 in a different direction, the heat seal strength in a different direction can be further improved. Further, the closed shape portion 113 includes a bent portion, and the bent portion is not limited to a right angle, and may be an acute angle, an obtuse angle, or a rounded portion.

Alternatively, as shown in FIG. 18, a groove 100 having a groove line 111 is provided at the joint portion 50. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, a plurality of closed shape regions 113 continuous with the groove line 111 are provided in the groove 100, and the closed shape region 113 is provided on the upper edge 50a side of the groove line 111. Furthermore, the branch line 112 branches from the closed shape region 113.

In this case, since the groove 100 includes a plurality of different directions, the heat seal strength in the plurality of directions can be improved. Further, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. This is formed so that the end of the groove 100 does not communicate with the lower edge 50b inside the bag body 3, but the groove 100 communicates with the lower edge 50b and the upper edge 50a inside the bag body 3. Because there is no.

Alternatively, as shown in FIG. 19A, the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, the groove line 111 further extends to the upper edge 50a, and the end portions 100c extending from a plurality of points of the groove line 111 communicate with the upper edge 50a.

In this case, since the groove 100 includes a plurality of different directions, the heat seal strength in the plurality of directions can be improved. Further, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. This is formed so that the end of the groove 100 does not communicate with the lower edge 50b inside the bag body 3, but the groove 100 communicates with the lower edge 50b and the upper edge 50a inside the bag body 3. Because there is no.

Alternatively, as shown in FIG. 19B, the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, the groove line 111 further extends to the upper edge 50a, and the end portions 100c extending from a plurality of points of the groove line 111 communicate with the upper edge 50a. Further, the groove line 111 is provided with a plurality of branch lines 112 extending toward the lower edge 50b.

In this case, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. ..

Alternatively, as shown in FIG. 19C, the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, the groove line 111 is provided with a plurality of closed shape regions 113, the groove line 111 extends from the closed shape region 113, and the extended end portion 100c of the groove line 111 communicates with the upper edge 50a.

In this case, since the groove 100 includes a plurality of different directions, the heat seal strength in the plurality of directions can be improved. Further, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. This is formed so that the end of the groove 100 does not communicate with the lower edge 50b inside the bag body 3, but the groove 100 communicates with the lower edge 50b and the upper edge 50a inside the bag body 3. Because there is no.

Alternatively, as shown in FIG. 19D, the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, the groove line 111 further extends to the upper edge 50a, and the end portions 100c extending from a plurality of points of the groove line 111 communicate with the upper edge 50a. Further, a plurality of closed shape regions 113 are provided below the groove line 111.

In this case, since the groove 100 includes a plurality of different directions, the heat seal strength in the plurality of directions can be improved. Further, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. This is formed so that the end of the groove 100 does not communicate with the lower edge 50b inside the bag body 3, but the groove 100 communicates with the lower edge 50b and the upper edge 50a inside the bag body 3. Because there is no.

Alternatively, as shown in FIG. 20, the joint portion 50 is provided with a groove 100 having a wide groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, since the groove 100 is formed to be wide, air at the time of heat sealing can be effectively discharged.

In this case, since the groove 100 includes a plurality of different directions, the heat seal strength in the plurality of directions can be improved. Further, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. This is formed so that the end of the groove 100 does not communicate with the lower edge 50b inside the bag body 3, but the groove 100 communicates with the lower edge 50b and the upper edge 50a inside the bag body 3. Because there is no.

Alternatively, as shown in FIG. 21A, the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c.

Further, the joint portion 50 is provided with an additional groove 115 separately from the groove 100, one end portion 115a of the additional groove 115 communicates with the left side edge 50c, and the other end portion 115b communicates with the right side edge 50d. Here, the additional groove 115 means a groove separate from the groove 100 having one end portion 100a communicating with one edge and the other end portion 100b communicating with the other edge, and the one end portion 115a of the additional groove 115 or the other. The end 115b communicates with either edge.

In this case, since the groove 100 includes a plurality of different directions, the heat seal strength in the plurality of directions can be improved. Further, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. This is formed so that the end of the groove 100 does not communicate with the lower edge 50b inside the bag body 3, but the groove 100 communicates with the lower edge 50b and the upper edge 50a inside the bag body 3. Because there is no.

Further, since the one end 115a and the other end 115b of the additional groove 115 communicate with the left side edge 50c and the right side edge 50d along the flow of the liquid, it is possible to prevent the liquid from leaking through the additional groove 115.

Alternatively, as shown in FIG. 21B, the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c.

Further, the joint portion 50 is provided with two additional grooves 115 independently of the groove 100, the end portion 115a of one additional groove 115 communicates with the left edge 50c, and the end portion 115b of the other additional groove 115. Communicates with the right edge 50d.

In this case, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. ..

Further, one end 115a of one additional groove 115 and one end 115b of the other additional groove 115 communicate with the left edge 50c or the right edge 50d along the flow of the liquid, but the additional groove 115 eventually communicates with the left edge 50c or the right edge 50d. Since the other end remains in the joint 50, it is possible to prevent the liquid from leaking through the additional groove 115. The additional groove 115 has the same effect even if it communicates with the upper edge 50a and the lower edge 50b as long as it stays in the joint portion 50.

Alternatively, as shown in FIG. 21 (c), the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c.

Further, the joint portion 50 is provided with two additional grooves 115 independently of the groove 100, both ends 115a of one additional groove 115 communicate with the left edge 50c, and both ends 115b of the other additional groove 115. Communicates with the right edge 50d.

In this case, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. ..

Both ends 115a of one additional groove 115 and both ends 115b of the other additional groove 115 communicate with the left side edge 50c or the right side edge 50d along the flow of the liquid, but the additional groove 115 both ends 115b. Can communicate with the same edges 50c and 50d, so that the liquid can be prevented from leaking through the additional groove 115. The additional groove 115 has the same effect even if it communicates with the upper edge 50a and the lower edge 50b as long as it communicates with the same edge.

Alternatively, as shown in FIG. 22A, the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c.

Further, the groove line 111 is further extended to the upper edge 50a, and the end portions 100c extended from a plurality of points of the groove line 111 communicate with the upper edge 50a.

In this case, since the groove 100 includes a plurality of different directions, the heat seal strength in the plurality of directions can be improved. Further, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. This is formed so that the end of the groove 100 does not communicate with the lower edge 50b inside the bag body 3, but the groove 100 communicates with the lower edge 50b and the upper edge 50a inside the bag body 3. Because there is no.

Alternatively, as shown in FIG. 22B, the joint portion 50 is provided with two grooves 100 having groove lines 111. In FIG. 22B, one end 100a of the first groove 100A communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, one end 100b of the second groove 100B communicates with the lower edge 50b of the joint 50, and the other end 100b communicates with the left edge 50c.

Further, the end 100c extended from the plurality of groove lines 111 of the first groove 100A communicates with the upper edge 50a, and the end 100c extended from the plurality of groove lines 111 of the second groove 100B is connected to the lower edge 50b. Communicate.

In this case, since the groove 100 includes a plurality of different directions, the heat seal strength in the plurality of directions can be improved. Further, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. This is because the groove 100 is not formed so as to communicate the lower edge 50b and the upper edge 50a, which are inside the bag body 3.

Alternatively, as shown in FIG. 22 (c), the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c.

Further, a plurality of closed shape regions 113 are connected to the groove wire 111, the groove wire 111 extends from the closed shape region 113 to the upper edge 50a, and the extended end portion 100c of the groove wire 111 communicates with the upper edge 50a. There is.

In this case, since the groove 100 includes a plurality of different directions, the heat seal strength in the plurality of directions can be improved. Further, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. This is formed so that the end of the groove 100 does not communicate with the lower edge 50b inside the bag body 3, but the groove 100 communicates with the lower edge 50b and the upper edge 50a inside the bag body 3. Because there is no.

Alternatively, as shown in FIG. 22D, the joint portion 50 is provided with two grooves 100 having groove lines 111. One end 100a of the first groove 100A communicates with the upper edge 50a of the joint 50, and the other end 100b communicates with the left edge 50c. Further, one end 100b of the second groove 100B communicates with the lower edge 50b of the joint 50, and the other end 100b communicates with the left edge 50c.

Further, a plurality of closed shape regions 113 are connected to the groove wire 111 of the first groove 100A, the groove wire 111 extends from the closed shape region 113 to the upper edge 50a, and the extended end portion 100c of the groove wire 111 is on the upper side. A plurality of closed shape regions 113 are connected to the groove wire 111 of the second groove 100A, which communicates with the edge 50a, and the groove wire 111 extends from the closed shape region 113 to the lower edge 50b, and the groove wire 111 is extended. The end 100c communicates with the lower edge 50b.

In this case, since the groove 100 includes a plurality of different directions, the heat seal strength in the plurality of directions can be improved. Further, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. This is because the groove 100 is not formed so as to communicate the lower edge 50b and the upper edge 50a, which are inside the bag body 3.

Alternatively, as shown in FIGS. 23A and 23B, the joint portion 50 is provided with four grooves 100 having wide groove lines 111.

In FIGS. 23A and 23B, one end 100a of the upper left groove 100 communicates with the upper edge 50a, and the other end 100b communicates with the left edge 50c. Further, one end 100a of the groove 100 on the upper right communicates with the upper edge 50a, and the other end 100b communicates with the right edge 50d.

Further, one end 100a of the lower left groove 100 communicates with the lower edge 50b, and the other end 100b communicates with the left edge 50c. Further, one end 100a of the lower right groove 100 communicates with the lower edge 50a, and the other end 100b communicates with the right edge 50d.

In this case, since the groove 100 includes a plurality of different directions, the heat seal strength in the plurality of directions can be improved. Further, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. This is because the groove 100 is not formed so as to communicate the lower edge 50b and the upper edge 50a, which are inside the bag body 3. Further, since the groove 100 is formed to be wide, air at the time of heat sealing can be effectively discharged.

Alternatively, as shown in FIG. 24A, the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a, and the other end 100b communicates with the left edge 50c. Further, a closed shape region 113 is connected to the groove line 111, the groove line 111 extends from the closed shape region 113 to the upper edge 50a, and the extended end 100c of the groove line 111 communicates with the upper edge 50a.

Further, the joint portion 50 is provided with two additional grooves 115 independently of the groove 100, one end 115a of each additional groove 115 communicates with the left edge 50c, and the other end 115b communicates with the right edge 50d. To do.

In this case, since the groove 100 includes a plurality of different directions, the heat seal strength in the plurality of directions can be improved. Further, since at least one of the one end 100a and the other end 100b of the groove 100 communicates with the edge 50c along the flow direction of the liquid, it is possible to prevent the liquid from leaking through the groove 100. This is formed so that the end of the groove 100 does not communicate with the lower edge 50b inside the bag body 3, but the groove 100 communicates with the lower edge 50b and the upper edge 50a inside the bag body 3. Because there is no.

Further, since both one end 115a and the other end 115b of the additional groove 115 communicate with the left side edge 50c or the right side edge 50d along the flow of the liquid, it is possible to prevent the liquid from leaking through the additional groove 115.

Alternatively, as shown in FIG. 24B, the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a, and the other end 100b communicates with the left edge 50c. Further, a closed shape region 113 is connected to the groove line 111, the groove line 111 extends from the closed shape region 113 to the upper edge 50a, and the extended end 100c of the groove line 111 communicates with the upper edge 50a.

Further, the joint portion 50 is provided with four additional grooves 115 independently of the groove 100, the end portion 115a of the left additional groove 115 communicates with the left edge 50c, and the end of the right additional groove 115. The portion 115b communicates with the right edge 50d.

In this case, since the ends of the left and right additional grooves 115 opposite to the ends 115a and 115b stay in the joint portion 50, it is possible to prevent the liquid from leaking through the additional grooves 115.

Alternatively, as shown in FIG. 24 (c), the joint portion 50 is provided with a groove 100 having a groove line 111. One end 100a of the groove 100 communicates with the upper edge 50a, and the other end 100b communicates with the left edge 50c. Further, a closed shape region 113 is connected to the groove line 111, the groove line 111 extends from the closed shape region 113 to the upper edge 50a, and the extended end 100c of the groove line 111 communicates with the upper edge 50a.

Further, the joint portion 50 is provided with two additional grooves 115 independently of the groove 100, both ends 115b of the left additional groove 115 communicate with the left edge 50c, and both ends of the right additional groove 115. The portion 115b communicates with the right edge 50d.

In this case, since the additional grooves 115 communicate with the same edges 50c and 50d, it is possible to prevent the liquid from leaking through the grooves 100.

<Modification example>
Next, other modifications of the present invention will be described with reference to FIGS. 26 to 28.
The modified examples shown in FIGS. 26 to 28 use a gusset type bag body as the bag body 10, and other configurations are substantially the same as those of the embodiments shown in FIGS. 1 to 25.

As shown in FIGS. 26 to 28, the liquid storage container 1 of the present embodiment includes a bag body 3 and a spout 40 joined to the bag body 3, of which the bag body 3 is on the front surface ( Two rectangular multilayer films 2 arranged on the front side surface in FIGS. 26 and 27 (a) and the back surface (back surface in FIGS. 26 and 27 (a)), and the multilayer film 2 It has two multilayer films 2'arranged on both sides (both sides in the left-right direction in FIGS. 26 and 27 (a)), and these multilayer films 2 and 2'are adjacent to each other. The edges are liquid-tightly joined to each other by heat sealing. In the initial state, the multilayer film 2'is folded inward on both sides of the bag body 3 as a folding portion 22, but gradually expands as the bag body 3 is filled with the liquid to form a gusset. ing.

These multilayer films 2 and 2'are joined to each other as follows, for example, to form the bag body 3. That is, first, the two multilayer films 2 are overlapped so that the long sides and the short sides of each other coincide with each other and the inner bags 21 face each other. Then, the two multilayer films 2'are sandwiched between the two multilayer films 2 in a state of being folded in half so that the inner bag 21 is on the outside. At this time, as shown in FIG. 26, the long sides of each multilayer film 2'correspond to each long side of the multilayer film 2, and the crease 3g of the multilayer film 2'(in FIGS. 26 and 27 (a)). (Indicated by the broken line) is arranged so as to be located inside the multilayer film 2 in the width direction. Then, in the region where the multilayer film 2'exists between the two multilayer films 2 arranged so as to face each other (the outer region of the region sandwiched by the broken line in FIG. 26), the multilayer film 2 and the multilayer film 2' The edges of the creases are hermetically joined by heat sealing except for the crease 3g. Further, in the region where the multilayer film 2'does not exist between the two multilayer films 2 arranged so as to face each other (the region sandwiched by the broken line in FIG. 26), the two multilayer films 2 are formed at the upper edge 3a. The spout 40 is inserted between the spouts 40, and the joint portion 50 of the spout 40 and the upper edge (upper edge in FIG. 26) 3a of the multilayer film 2 are liquid-tightly bonded by a heat seal, and at the bottom edge 3b, The two multilayer films 2 are liquid-tightly bonded to each other by heat sealing.

As described above, the bag body 3 is obtained by folding the multilayer film 2 and the multilayer film 2'in a gusset shape and heat-sealing the peripheral edge to form the heat-sealed 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 and 3c. Further, the upper edge 3a includes one upper edge heat seal portion 10a, the bottom edge 3b includes one bottom edge heat seal portion 10b, and each side edge 3c and 3c includes one side edge heat seal portion 10c. The heat seal portion 10 is composed of the upper edge heat seal portion 10a, the bottom edge heat seal portion 10b, and the side edge heat seal portion 10c.

Further, in the present embodiment, the upper edge 3a of the bag body 3 includes one upper edge heat-sealing portion 10a as described above, but two or more heat-sealing portions may be formed on the upper edge 3a. ..

Further, the spout 40 has a joint portion 50 welded to the upper edge 3a of the bag main body 3 and a spout main body 41 that is connected to the joint portion 50 and projects outward from the bag main body 3. A spout flange 42 is provided at the upper end of the 41. Further, as shown in FIG. 1, the spout 40 is welded between the inner bags 21 of the multilayer film 2 at the joint portion 50.

As shown in FIGS. 26, 27 (a) and 28 (a), the joint portion 50 of the spout 40 is provided on both sides of the central portion 51 and the central portion 51 and is thinner than the thickness of the central portion 51. It is formed of an elliptical cylinder having a thin wall portion 52, is flat, and has a through hole 45 in a central portion 51. Normally, when the spout 40 is welded between the inner bags 21 of the multilayer film 2 at the joint portion 50, a gap is formed between the inner bags 21 and the two regions surrounded by the ends of the joint portion 50, which tends to cause poor sealing. .. In order to prevent this, thin-walled portions 52 are provided on both sides, and the thin-walled portions 52 are melted at the time of welding to prevent the formation of gaps.

The spout main body 41 of the spout 40 is formed of a tubular body having a substantially U-shaped cross section, and a spout flange 42 is provided on the upper peripheral edge thereof. An opening 44 is formed in the bottom 43 of the spout main body 41. Ventilation can be ensured between the liquid storage container 1 and the outer container 5 described later by the opening 44, and when the content liquid is pumped out during use, the liquid storage container 1 and the outer container 5 are pumped through the opening 44. A gas can be introduced between the two, and an air body is applied from the outside of the liquid storage container 1 to smoothly pump out the content liquid inside the liquid storage container 1. Further, the bottom portion 43 in the spout main body 41 is provided with a spout upper member 70 extending in the vertical direction.

The spout flange 42 of the spout 40 is attached to the opening 5a formed in the outer container 5 via the holder 80 described above, and the liquid storage container 1 is supported in the outer container 5.

The gusset-shaped folds 3g of the bag body 3 are located near both end positions of the joint portion 5 of the spout 40.

The crease 3g may be provided anywhere as long as it is between the positions on both sides of the joint portion 5 of the spout 40 and the left and right ends of the bag body 3. For example, as shown in FIGS. 27 (b) and 28 (b), by bringing the crease 3 g to an intermediate position between both side positions of the joint portion 5 of the spout 40 and the left and right ends of the bag body 3, the upper part Regarding the joint portion between the edge heat seal portion 10a and the upper edge 3a of the multilayer film 2, the two left and right four-direction branches shown in FIG. 28 (a) are formed by a plurality of three on the left and right as shown in FIG. 28 (b). The strength of the bag body 3 can be improved by directionally branching and dispersing the joints.

1 Liquid storage container 3 Bag body 3a Upper edge 3b Bottom edge 3c Side edge 3g Fold 5 Outer container 5a Opening 10 Heat seal part 20 Outer bag 21 Inner bag 22 Folding part 40 Inlet 41 Inlet body 42 Inlet flange 47 Intermediate Part 50 Joint 50a Upper edge 50b Lower edge 50c Left edge 50d Right edge 80 Holder 80A Combination of spout and holder 100 Groove 100a One end 100b End end 111 Groove line 112 Branch 113 Closed shape area 115 Additional groove

Claims (11)

At the spout that is joined to the bag body
With the spout body
It is provided with a joint that is connected to the spout body and is joined to the bag body.
The joint has at least one groove formed on its outer surface.
One end of all the grooves in the groove communicates only in a direction different from the direction connecting the inside of the bag body and the outside of the bag body, and the other end of all the grooves in the groove communicates with the inside of the bag body or the bag. A spout that communicates with only one of the outside of the main body. The outer peripheral edge of the joint portion has a polygonal shape when viewed from the normal direction of the bag body, one end of the groove communicates with one side of the joint portion, and the other end of the groove is inside the bag body or the said. The spout according to claim 1, wherein the spout is communicated with either one of the outside of the bag body. The spout according to claim 2, wherein the outer peripheral edge of the joint has a rectangular shape when viewed from the normal direction of the bag body. The spout according to claim 1, wherein the joint portion is joined to the upper edge of the bag body. A claim characterized in that the groove has a groove line and a branch portion branching from the groove line, the groove line includes the one end portion and the other end portion, and the branch portion stays in the joint portion. Item 1. The spout. The groove has a groove line and a closed shape region continuous with the groove line, the groove line includes the one end portion and the other end portion, and the closed shape region stays in the joint portion. The spout according to claim 1. The joint portion has an additional groove formed on its outer surface, and at least one of one end and the other end of the additional groove communicates in a direction different from the direction connecting the inside of the bag body and the outside of the bag body. The spout according to claim 1, wherein the spout is characterized by the above. With the bag body
Equipped with a spout that is joined to the bag body,
This spout is
With the spout body
It is provided with a joint that is connected to the spout body and is joined to the bag body.
The joint has at least one groove formed on its outer surface.
One end of all the grooves in the groove communicates only in a direction different from the direction connecting the inside of the bag body and the outside of the bag body, and the other end of all the grooves in the groove communicates with the inside of the bag body or the bag. A liquid storage container that communicates with only one of the outside of the main body. The liquid storage container according to claim 8, wherein the spout is directly attached to an outer container having an opening, and the spout has a flange that engages with the opening. The liquid storage container according to claim 8, wherein the spout is attached to an outer container having an opening via a holder, and the spout has a flange that engages with the holder. It is provided with an outer container and a liquid storage container stored in the outer container.
The liquid storage container is
With the bag body
Equipped with a spout that is joined to the bag body,
This spout is
With the spout body
It is provided with a joint that is connected to the spout body and is joined to the bag body.
The joint has at least one groove formed on its outer surface.
One end of all the grooves in the groove communicates only in a direction different from the direction connecting the inside of the bag body and the outside of the bag body, and the other end of all the grooves in the groove communicates with the inside of the bag body or the bag. A combination of a liquid storage container and an outer container, which is characterized in communicating with only one of the outside of the main body.

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