JP2000103441A - Liquid housing bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain the suction efficiency high even when a liquid of a high viscosity is housed by partitioning a specified space from a spout attaching section to the deep end in a liquid housing bag, and enclosing a frame structure in a such a manner that the bottom section of the housing bag may be pulled into the specified space when the liquid is sucked. SOLUTION: Two sheets of synthetic resin 1a, and 1b comprising a flat vinyl or the like having flexibility, are superposed, and the end portion regions are heat-welded, and a bag main body 1 is formed. Then, a spout 3 is welded in the central region of the upper end edge, and in the meantime, an end portion region on the confronted portion with the spout 3 is left unwelded. Under this state, a frame structure 10 is enclosed from the opening section of the unwelded region. That is, the frame structure 10 is positioned in such a manner that the claw 12c of an engaging protuberance 12b which is formed on the engaging section 12 is engaged with a section to be engaged, of the spout 3. Therefore, when a liquid in the bag main body 1 is sucked, the internal surface of the bag main body 1 is closely joined to the outer peripheral portion of the frame structure 10, and the internal space of the bag main body 1 is maintained, and the liquid can be sucked to the very last.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid storage bag to which a spout is attached and which can suck a liquid having a relatively high viscosity even if it is stored therein.

[0002]

2. Description of the Related Art Generally, bags are widely used in distribution systems because it is inexpensive to use bags as a means for containing and selling liquids. Then, in order to efficiently take out the liquid contained in such a bag, a suction tube is attached to a spout attached to the bag, and a system for sucking the liquid with the suction tube and supplying the liquid to a predetermined location. Is being developed.

In the above system, if the liquid in the bag is actually sucked, no problem occurs at the beginning of use, but the internal pressure inside the bag gradually decreases, and a part of both inner surfaces of the bag and almost the entire surface of the bag. Come into close contact with each other. When such close contact occurs, the suction amount of the liquid gradually decreases, and eventually the liquid is not sucked at all. Therefore,
At present, suction is stopped when a considerable amount of liquid remains in the bag, and an operation for switching to a new bag is performed, which causes considerable waste of liquid. Such waste becomes remarkable especially when the viscosity of the contained liquid is increased.

[0004] In order to solve the above problem, for example, Japanese Utility Model Publication No. 7-18595 discloses a spout attached to a bag.
A liquid storage bag is disclosed in which a liquid introducing body is formed extending inside a bag, and a number of ribs are formed on the liquid introducing body to prevent the bag from sticking during suction.

[0005]

However, even in the above-mentioned conventional liquid storage bag, if a high viscosity liquid is stored and suction is applied, there is no problem at the initial stage of suction, but the liquid introduction gradually extended into the bag. The bag adheres to the body region. Then, when such close contact occurs, the flow of the viscous liquid stops, so that suction cannot be performed with a certain amount of liquid remaining. Further, forming the liquid introducing body as described above complicates the molding of the spout.

An object of the present invention is to provide a liquid storage bag which has a high suction efficiency even when storing a highly viscous liquid and which does not complicate the molding of the spout.

[0007]

In order to solve the above-mentioned problems, a liquid storage bag according to the present invention comprises a spout mounted inside a liquid storage bag capable of storing a liquid. A frame structure for defining a predetermined space from the inside toward the inside of the storage bag is enclosed.

In the above configuration, when the liquid inside is actually sucked through the spout, the pressure inside the storage bag is gradually reduced, but the frame structure having the above configuration is sealed inside the storage bag. Therefore, close contact between the inner surfaces of the bag is prevented, and a space in which the liquid can flow is secured. For this reason, a highly viscous liquid is stored, and even when the liquid is sucked, the inner surfaces of the bags do not adhere to each other, the internal space defined by the frame structure is maintained, and most of the stored liquid is efficiently used. It is sucked.

[0009]

Embodiments of the present invention will be described below.

FIG. 1 is a view showing an example of the configuration of a liquid storage bag according to the present invention. FIG. 2 is a perspective view showing an embodiment of a frame structure enclosed in the liquid storage bag shown in FIG. Figure,
FIG. 3 is a rear view of the frame structure shown in FIG. 2, and FIG. 4 is a partial cross-sectional view of a liquid storage bag in which the frame structure shown in FIG. 1 is sealed.

The bag body 1 constituting the liquid storage bag according to this embodiment is formed by, for example, heat welding end portions of two flexible flat synthetic resin sheets 1a and 1b such as vinyl. Is done. The welding area is indicated by hatching in the figure. In this welding, the spout 3 that allows the liquid inside to be taken out is welded, and the end area of the opposing portion is an unwelded area. As shown in FIG. 1, the unwelded area is welded after the frame structure 10 is sealed.

The spout 3 attached to the bag body is formed of, for example, a synthetic resin, and has a body 5 to which the inner surface of each bag body is welded, and an opening 5a formed in the body 5 to allow liquid to be taken out. And a cap 6 attached to the outer periphery of the mouth 5a by, for example, screwing. An engaged portion 5b is preferably formed on the inner periphery of the mouth 5a so that a frame structure described later can be fixed.

Thus, a liquid storage bag to which the spout 3 is attached is formed. The configuration of the shape of the bag body and the shape and size of the spout 3 attached to the bag body are not limited to the configuration shown in the figure, and various types can be used. It is.

A frame structure 10 as shown in FIGS. 2 and 3 is enclosed inside the bag body 1 to which the spout 3 is attached. Hereinafter, this frame structure 1
0 will be described.

The frame structure 10 has a shape such that a predetermined space is defined inside the bag body. In this embodiment, as shown in FIG. Approximately conical portion 10a gradually spreading downward from
And a substantially cylindrical portion 1 extending downward from the substantially conical portion.
0b, specifically, as shown in the cross-sectional shape of FIG. 4, it has a hanging bell shape with an open lower end. The outer shape is formed by an engaging portion 12 that can be engaged with the spout, an annular portion 14 that defines an opening at a lower end,
A plurality of frames 15 are arranged at regular intervals along the axis X of the spout so as to define the predetermined internal space between the engagement portion 12 and the annular portion 14.

As shown in FIG. 3, both ends of each frame 15 are connected to the back surface of the engaging portion 12 and the inner surface of the annular portion 14, respectively, and are long so that the connecting positions at the engaging portion 12 are different. Every other frame 15a and short frames 15b are arranged. Thus, on the back surface side of the engagement portion 12, 1
By configuring each frame such that every other connection position is different, a liquid flow path is secured near the spout position, and the liquid can be efficiently sucked.

The engaging portion 12 has a central portion
The spout 3 has an annular shape formed with a hole 12a through which a liquid passes, and has an upper surface having an engagement portion engageable with an engaged portion 5b formed on the inner periphery of the mouth 5a of the spout 3. Collision part 12
b is formed. The engagement protrusions 12b are formed at two places at 180-degree intervals, and each end has a claw 12c that can be locked to the engaged portion 5b, and the frame structure 10 is inserted from below by a taper shape. It is configured to be guided and lock the two when it is done. The number of the engagement protrusions 12b is arbitrary, and the specific engagement structure can be variously modified.

The material constituting the frame structure 10 is not particularly limited. For example, the material can be integrally formed of a synthetic resin such as polypropylene or polyethylene. In this case, in consideration of the mold releasability of the mold, the engaging portion 12 is formed along the hole 12a so as to extend along the hole 12a.
Small holes 12d are formed at predetermined intervals.

The length L of the frame structure 10 is set so that the bottom of the bag is substantially fit into the internal space defined by the frame structure when the liquid actually contained is sucked. It is preferable to make the length L1 approximately half. That is, when the suction is applied, finally, the bottom of the bag is sucked to the vicinity of the spout mounting position in the internal space, so that the liquid accumulated at the bottom of the bag can be efficiently sucked.

Next, a description will be given of a process of forming the above-mentioned liquid storage bag and an operation of actually taking out liquid by applying suction.

First, two flexible flat synthetic resin sheets 1a and 1b made of vinyl or the like are stacked, and the end regions thereof are heat-welded to form the bag body 1. In this case, the spout 3 is welded to the central region of the upper edge, and the end region of the opposing portion is not welded. In this state, the frame structure 10 is sealed from the opening of the unwelded region as shown in FIG. As described above, since the upper end side of the frame structure 10 has a weight shape as shown in FIG. 2, it can be easily housed in the bag body. In the frame structure 10 housed in the bag body, the claws 12c of the engaging projections 12b formed on the engaging portions 12 at the upper end engage the engaged portions 5b on the inner periphery of the spout mouth. As a result, the position is established.

Then, in this state, the liquid is accommodated in the bag from the unwelded portion, and the unwelded portion is welded to complete the liquid containing bag containing the liquid. In addition, the liquid may be stored from the spout portion after the unwelded portion is first welded.

After the liquid is actually stored in the liquid storage bag in which the frame structure 10 is sealed as described above, when a suction action is applied to the liquid, the internal pressure of the bag body 1 gradually decreases as the liquid flows out. go. At this time, the inner surface of the bag body 1 is in close contact with the outer peripheral portion of the frame structure 10, the close contact between the respective inner surfaces is prevented, and the internal space is maintained. Therefore, a flow path reaching the mouth 5a of the spout 3 is ensured, so that the liquid can flow out of the spout 3 to the end. Further, as described above, since the lower side of the frame structure 10 is open, the lower region of the bag is drawn into the internal space by the frame structure according to the suction operation. Since the passage is secured, the liquid can be efficiently taken out without leaving the inside through the passage. In this case, by setting the length of the frame structure 10 to about half the length of the bag body 1, the entire lower end region of the bag body 1 is dragged into the internal space, so that the liquid is efficiently taken out. be able to.

Further, the inner surface of the bag body is
Even if the outer peripheral portion of the engagement portion 12 and the annular portion 14 is in close contact,
Since the flow path is secured by the interval between the frames, most of the liquid can be taken out without remaining in the outer peripheral surface region of the frame structure. In particular, even with a highly viscous liquid, the internal space and the flow path as described above are secured, so that the liquid can be efficiently extracted.

Then, by enclosing the frame structure having such a structure, the spout 3 attached to the bag body is formed.
Can be used with an ordinary simple structure, and it is not necessary to perform particularly complicated molding.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be variously modified. For example, the bag body is not limited to the shape as in the above embodiment,
For example, various forms such as a double-sided gusset bag (double-side folded type), a single-sided gusset bag (single-side folded type), a self-standing bag (upright type), and the like are included. Things can be applied.
Further, the size of the frame structure relative to the size of the bag can be variously modified, and is not particularly limited. Further, as for the frame structure, in addition to the above-described hanging bell shape, for example, a polygonal cylindrical shape or a weight shape, a frame itself in a lattice shape, or a structure having a partially flat portion is used. Various modifications are possible.

[0027]

As described above, according to the present invention,
Even if a highly viscous liquid is stored, a liquid storage bag which has high suction efficiency and does not complicate spout molding is provided.

[Brief description of the drawings]

FIG. 1 is a diagram showing one configuration example of a liquid storage bag according to the present invention.

FIG. 2 is a perspective view showing an embodiment of a frame structure sealed inside the liquid storage bag shown in FIG.

FIG. 3 is a rear view of the frame structure shown in FIG. 2;

FIG. 4 is a partial cross-sectional view of a liquid storage bag in which the frame structure shown in FIG. 1 is sealed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bag main body 1a, 1b Synthetic resin sheet 3 Spout 5 Main body 5a Mouth 6 Cap 10 Frame structure 12 Engagement part 14 Annular part 15 (15a, 15b) Frame

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[Procedure amendment]

[Submission date] August 20, 1999 (1999.8.2
0)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

[0007]

In order to solve the above-mentioned problems, a liquid storage bag according to the present invention comprises a spout mounted inside a liquid storage bag capable of storing a liquid. And a predetermined space is defined toward the inside of the storage bag, and the bottom of the storage bag is placed in the predetermined space during liquid suction.
Open the side opposite to the spout so that it is dragged
It is characterized by encapsulating that frame structure.

Claims (6)

[Claims] 1. A frame structure for defining a predetermined space from a portion where a spout is attached to the inside of a storage bag is sealed in a liquid storage bag to which a spout is attached and capable of containing a liquid. A liquid storage bag, characterized in that: 2. The liquid storage bag according to claim 1, wherein the frame structure has an opening on the side opposite to the spout. 3. The frame structure includes an engaging portion that engages with the spout, an annular portion that defines the opening, and the predetermined space extending between the engaging portion and the annular portion. The liquid storage bag according to claim 1, further comprising a plurality of frames extending at regular intervals along an axial direction of the spout, as defined. 4. The frame structure according to claim 1, wherein the frame structure has a length that is substantially half of a length of the liquid storage bag in an extending direction. Liquid storage bag. 5. The frame structure according to claim 1, wherein the frame structure has a shape that gradually enlarges the internal space from the engagement portion to the annular portion.
The liquid storage bag according to any one of the above. 6. A liquid storage bag to which a spout is attached and capable of containing a liquid, extends from a portion where the spout is attached toward the inside of the storage bag, and has a substantially conical portion and a substantially cylindrical portion. A liquid storage bag comprising a frame structure provided therein.