JP2000238800A - Unsealing structure of liquid-sealed storage bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To pour out a liquid in a storage bag stably from a cut-off portion of the bag. SOLUTION: A storage bag 10 can store a liquid such as refill detergent, beverage, or cooking oil and fat for example inside in a sealed state, and the bag is formed using two flat plate materials 11 constituting a bag body, a base plate material 12 and a connection tube 13. Each of the flat plate materials 11 and the base plate material 12 is formed of a film material made of a synthetic resin. The connection tube 13 is formed by cutting a synthetic resin pipe material into a predetermined length. Thus while the two flat plate materials 11, the base plate material 12 and the connection tube 13 are assembled as shown in the figure, heat is applied from outside to their periphery to have them interposed. At this time, an outer peripheral portion of the tube 13 is fusion-bonded while being interposed between the two materials 11 with the other end of the tube 13 not fusion-bonded between the materials 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening structure of a liquid sealing storage bag suitable for use in, for example, a bag for refilling a liquid detergent, a storage bag for paints and chemicals, a pack for soft drinks, and the like.

[0002]

2. Description of the Related Art Conventionally, as a bag for refilling a liquid detergent, for example, a storage bag shown in FIG. 17 is frequently used. The storage bag 1 is formed entirely of a synthetic resin film material, and the peripheral portions of the film materials are heat-sealed and attached to each other, so that the liquid detergent is stored in a sealed state inside. The storage bag 1 thus formed is provided with, for example, a cutout line 2 at a corner portion, and a cutout opening 3. When pouring the liquid detergent from the storage bag 1 to the outside, first, scissors are inserted from the cutout 3 along the cutout line 2 or torn with fingers.
The corner is cut off as shown in FIG. Next, as shown in FIG. 18, the opening 4 of the storage bag 1 whose corner has been cut is placed on a refilling opening of a detergent container (not shown), and the detergent in the storage bag 1 is poured out and transferred to the detergent container. I do. Thus, all the detergent in the storage bag 1 is poured out, and the operation of refilling the detergent has been completed.

[0003]

However, in the storage bag 1 thus constructed, the opening 4 whose corner is cut off as shown in FIG. And there was a problem that a stable pouring state could not be obtained. That is, when performing the refilling operation of the detergent, if the shape of the opening 4 that is in contact with the detergent container is not stable, there is a problem that the detergent spills or takes time to pour out.

On the other hand, there has recently been a sports drink or juice container employing a storage bag made of a synthetic resin film material as shown in FIG. The storage bag 5 is also formed by heat-sealing the peripheral portions of the film materials together and bonding them, and the spout 6 is welded to a part of the bonded portion. The spout 6 is entirely made of synthetic resin and is formed by a method such as injection molding. According to the storage bag 5 provided with the spout 6, by removing the cap 8 screwed into the spout 7 of the spout 6, the beverage in the bag 5 can be discharged from the spout 7 at any time.

[0005] The applicant has considered using a spout 6 in which the shape of the spout 7 is stable as a bag for refilling the detergent, but this type of spout 6 is formed by injection molding. Therefore, it was considered expensive and was unsuitable for containers of this kind of product, which should be kept in mind as simple as possible in consideration of environmental issues.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to discharge a liquid in a storage bag from a cut portion of the storage bag in a stable state.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is formed by a bag made of a synthetic resin film material. By cutting off the formed cutout portion, the cutout portion is cut off in the opening structure of the liquid-sealed storage bag that allows the liquid stored inside to be able to be poured outside from the cutout portion of the cutout portion. In the state, a communication pipe for liquid ejection for exposing one end portion to the outside and supporting the other end portion inside the bag body is disposed inside the bag body, and a cut-off portion of the bag body at the cutout portion. Is such that the liquid inside can be sealed so as to be tightly attached to the outer peripheral portion of the communication tube, and the liquid inside the bag is in the cut-off state of the cut-off portion and is poured out only from one end of the communication tube. It is.

Further, the synthetic resin film material constituting the bag has a two-layer structure in which the inside in contact with the liquid to be contained is made of a material having a low melting point and the outside is made of a material having a high melting point. The communication pipe for liquid discharge formed by the above has a two-layer structure with a material having a high melting point temperature on the inside and a material with a low melting point temperature on the outside, which is in contact with the liquid conducting inside. The communicating pipe supported is formed by heat-sealing the outer peripheral portion made of a material having a low melting point at the portion of the cut portion in a molten state inside a bag body also made of a material having a low melting point, and cutting off the cut portion. In this state, the liquid inside the bag body can be poured out from one end through the inside of the non-welded communication pipe.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid-sealed storage bag 10 is shown in FIG.
The shape shown in the inside, for example, detergent for refilling,
Liquids such as soft drinks and edible fats and oils can be stored in a sealed state. As shown in FIG. 1, the storage bag 10 is formed by using two flat plates 11 and one bottom plate 12, and one communication tube 13, which constitute the bag. Flat plate 11 and bottom plate 1
Each of 2 is formed of a synthetic resin film material. On the other hand, the communication pipe 13 is formed by cutting a synthetic resin pipe material into a predetermined length.

The communication tube 13 is formed in a two-layer structure as shown in FIG. 5 or FIG. 6. The inside 13A is made of a synthetic resin material having a high melting point such as nylon or polyester, and the outside 13B is made of a resin having a lower melting point than the inside 13A. It is made of a material such as polypropylene or polyethylene. Communication pipe 1
3 has a certain degree of rigidity as a whole, and can be flattened from the state shown in FIG. 5 to the state shown in FIG. 6 by applying an external force. In addition, as shown in FIG. 7, it is possible to restore the flat state by applying an external force with a finger in the direction of the arrow to the original circular state in cross section.

On the other hand, of the flat plate member 11 and the bottom plate member 12 constituting the bag body of the storage bag 10, the two flat plate members 11 are formed of a synthetic resin film material having a two-layer structure similarly to the communication pipe 13. Is done. That is, as shown in FIG. 8, the film material is such that the outer side 11A is formed of a synthetic resin material having a high melting point such as nylon or polyester, and the inner side 11B is formed of a material such as polypropylene or polyethylene having a lower melting point than the outer side 11A. I have. Further, the bottom plate 12 may have a two-layer structure made of the same material as the flat plate 11, or may be a single-layer film made of the same material as the inner layer of the flat plate 11. The bottom plate 12 is folded in the bent state shown in FIG.
It is arranged between the flat plates 11. The communication pipe 13 is also provided at a corner between the two flat plates 11.

Thus, the two flat plates 11 and the bottom plate 1
2, and in a state where the communication pipes 13 are combined as shown in FIG. 1, heat is applied to the periphery from outside so as to sandwich them. The heating portion is a hatched portion shown in FIG. 2, and the liquid to be filled therein is instantaneously supplied between the two flat plates 11 and the bottom plate 12 at the time of heat sealing by heating the peripheral portion. That is, the two flat plate members 11 and the bottom plate member 12 are melted by heating, the hatched portions shown in FIG. 2 are welded, and at the same time, the liquid is supplied to the inside, and the storage bag 10 is sealed and filled with the liquid. Becomes possible. At this time, the flat plate 11 made of the two-layer film is melted and welded only as shown in FIG. At one end (the other end is not heat-sealed and is supported between the two flat plates 11), only the portion of the outside 13B having a low melting point is melted, and the portion of the inside 11B of the flat plate 11 is melted. Are welded in a laminated state. At this time, the inner portion of the communication tube 13 is not welded because the melting point temperature is high. Further, the film material constituting the bottom plate 12 is also brought into close contact with the inner side 11B of the flat plate 11 in a molten state.

In the storage bag 10 whose peripheral part is heat-sealed in this manner, the corner formed by welding one end of the communication pipe 13 therebetween is cut from the state shown by the two-dot chain line in FIG. It is arranged in such an appearance. In order to pour out the liquid inside from the storage bag 10 having such a configuration, first, the portion of the line A shown in FIG. 4 or FIG. 11 is cut with scissors or the like, and the tip of the corner is cut off. In a state where the corner is cut off, one end of the communication tube 13 welded between the flat plates 11 is exposed to the outside (see FIG. 10). On the other hand, the other end of the communication pipe 13 is not welded between the flat plates 11, and the outer peripheral position of the communication pipe 13 is two flat plates 1.
Since it is welded while being sandwiched between the
The liquid inside can be poured out from one end only through the inside of the non-welded communication tube 13. In other words, the storage bag 10 whose corner (cut portion) has been cut off.
Is sealed to the outer peripheral portion of the communication pipe 13 so that the liquid inside can be sealed, and the liquid is cut off and the communication pipe 1 is exposed.
3 can be poured only from one end side. On this occasion,
If the flat communication pipe 13 is restored to a circular shape as shown in FIG. 7 and poured out, the liquid can be poured in a stable state from one end of the communication pipe 13, For example, it is also possible to apply one end of the communication tube 13 to the mouth of a small bottle and to pour out (replace) the liquid.

The storage bag 10 having such a structure can be used simply by cutting off the bag located at one end of the communication tube 13, and a stable liquid pouring state can be obtained. There are various uses such as containers and storage containers for oils and fats. Further, as shown in FIG. 14, the storage bag 10 can be formed by sequentially disposing communication pipes 13 between the flat plate material 11 and the bottom plate material 12 which are in a continuous state (standing pouch flat plate bag). . Further, as shown in FIG. 15, one end of the communication pipe 13 is sequentially welded in a state where continuous bag making is performed by a method called vertical pillow bag making to form a spout portion for cutting off when used. It may be. Further, in the above embodiment, the flat plate material 11, the bottom plate material, and the communication tube 13 are formed of a two-layer film material, but may be formed of one layer.

[0015]

FIG. 12 and FIG. 13 relate to an embodiment of the present invention. The storage bag 20 is formed by heat-sealing the peripheral portions of the film material 21 (hatched portion in FIG. 12).
At that time, the liquid is hermetically filled with the liquid. The communication tube 13 is welded so as to be sandwiched between the two film materials 21 in a state where the middle position in the longitudinal direction is continuous with the peripheral heat sealing position, and one end of the communication tube 13 is also in close contact with the peripheral portion. That is, the storage bag 20 is double-sealed at the corners, and the communication tube 13 is sealed with one end of the storage tube 20 in contact with the peripheral heat seal portion. On the other hand, the other end side of the communication pipe 13 is supported inside where the liquid is supplied. The storage bag 20 has a corner portion serving as a cutout portion 22, and a cutout 23 for cutting off the cutout portion 22 by hand is formed at a corner of the storage bag. In this manner, the entire cutout 22 can be cut off from the cutout 23 as shown in FIG. 13, thereby exposing one end of the communication tube 13 in a sealed state, and allowing the internal liquid to flow from the one end. It becomes possible to pour out.

As described above, according to the present invention, there is an effect that the liquid in the storage bag can be stably discharged from the cut portion of the storage bag.

[Brief description of the drawings]

FIG. 1 is a perspective view showing components of a storage bag according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing a heat seal portion of each component.

FIG. 3 is a perspective view showing a completed state of the storage bag.

FIG. 4 is an explanatory view showing a cut-out portion of a storage bag.

FIG. 5 is a perspective view showing a structure of a communication pipe.

FIG. 6 is a cross-sectional view showing the communication pipe in a flat state.

FIG. 7 is an explanatory view showing a restored state of the communication pipe in a flat state.

FIG. 8 is a cross-sectional view showing a state in which the communication tube is welded to a film material forming a bag body.

FIG. 9 is a sectional view taken along the line IX-IX of FIG. 3;

FIG. 10 is a perspective view similar to FIG. 3, showing a storage bag from which a cut portion has been cut;

FIG. 11 is a cross-sectional view showing a welded structure of a cut portion.

FIG. 12 is a sectional view showing a storage bag according to an embodiment of the present invention.

FIG. 13 is a cross-sectional view showing a storage bag from which a cut portion has been cut.

FIG. 14 is a perspective view showing an example of continuously forming the storage bag according to the embodiment.

FIG. 15 is a perspective view showing another example of continuously forming the storage bag according to the embodiment.

FIG. 16 is a front view showing a conventional liquid-sealed storage bag using a spout.

FIG. 17 is a perspective view showing a conventional storage bag for refilling a liquid detergent.

FIG. 18 is a perspective view showing a state where corners of the storage bag are cut off.

[Explanation of symbols]

 1, 5, 10, 20 Storage bag 2 Cut-out line 3, 23 Cut-out 4 Opening 6 Spout 7 Spout 11 Flat plate 12 Bottom plate 13 Communication tube 21 Film 22 Cut-out

Claims (3)

[Claims] 1. A bag made of a synthetic resin film material, containing a liquid in a hermetically sealed state, and cutting off a cutout formed in a part thereof.
In the opening structure of the liquid sealing storage bag that allows the liquid stored therein to be able to be poured out from the cut portion of the cut portion to the outside, one end of the cut portion is exposed to the outside while the cut portion is cut, A communication pipe for discharging liquid for supporting the other end inside the bag body is disposed inside the bag body, and the cut-off portion of the cut body at the cutout portion can seal the liquid inside so that the communication pipe can be sealed. A liquid-tight storage bag opening structure in which the liquid inside the bag body is in the cut-off state of the cut-off portion and can be poured out only from one end of the communication pipe to the outside. 2. The opening structure of a liquid-sealed storage bag according to claim 1, wherein the communication pipe for discharging the liquid is made of a rigid synthetic resin pipe material. 3. The synthetic resin film material constituting the bag has a two-layer structure in which the inside in contact with the liquid to be contained is made of a material having a low melting point temperature and the outside is made of a material having a high melting point temperature.
On the other hand, the communication pipe for liquid injection formed of synthetic resin material is
The communication pipe supported inside the bag has a two-layer structure in which the inside in contact with the liquid conducting inside is made of a material having a high melting point temperature and the outside is made of a material having a low melting point temperature. The outer periphery made of a low temperature material,
Similarly, the liquid inside the bag is passed through the inside of the non-welded communication pipe with the cut portion cut off, and the liquid inside the bag is discharged from one end of the bag inside the bag made of a material also having a low melting point. 2. The unsealing structure for a liquid-sealed storage bag according to claim 1, wherein the bag can be poured out.