JPH107185A - Flexible container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible container from which the contents composed of granule can be rapidly, easily, and completely discharged without leaving the material therein, even if the container is made larger. SOLUTION: This flexible container is provided with an airtight flexible outer bag 3 and a flexible inner bag 2 contained in the outer bag 3. A fluid is charged in the inner bag without leakage. This foldable container has only one discharge opening to discharge the fluid. In this container, a plurality of discharge openings 5 for the fluid are provided at the bottom of the inner bag. The inner bag connected to the upper part of the discharge openings is formed so that the shape of the inner bag has inclined faces widened upward on discharging the contents. At the time, the inclined angle θmade by the inclined faces is larger than the reposed angle α.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for storing a substance having fluidity (for example, a powdery substance, a liquid such as water or oil, etc.) therein and transferring the stored substance to a target place. And more particularly to a foldable flexible container.

[0002]

2. Description of the Related Art Conventionally, a substance having fluidity (hereinafter, referred to as "fluid")
Unless otherwise specified, typical transportation methods of “particles” are a method using a tank lorry and a method using a flexible container.

[0003] In the former method using a tank lorry, the rigid tank attached to the carrier of the vehicle is moved to the position for receiving and taking out the particles, and the particles are introduced into the tank at each position. It is intended to fill or discharge powders in a tank. According to this method, since the tank has rigidity as a pressure vessel,
Since the discharge of the powder in the tank can be performed by pneumatic feeding, there is an advantage that the charging and discharging of the powder can be performed simply and quickly. However, in such a method, since the rigid tank is used, the return path which has completed the transportation of the granular material is
There is a problem in that the vehicle runs with an empty load and the transportation efficiency is extremely low.

[0004] In the latter method using a flexible container, the container can be folded back after the transportation of the granular material, whereby the car carrier can be emptied, and another baggage can be loaded on the empty car carrier. There is a transportation advantage that you can return home. In order to take advantage of this advantage, a method of transporting the granular material using a flexible container is adopted. However, this method has a problem in discharging the granular material stored in the container quickly and easily.

That is, in the case of a rigid container, the entire container is tilted, whereby the contents can be discharged from the container. However, in the case of a flexible container, the container itself is lifted because it is not rigid. You can't tilt. For this reason, several proposals have been made to discharge the contents in the container.

[0006] As a method of discharging the contents stored in such a container, for example, a compressed air is caused to flow between the flexible inner bag and the outer bag by allowing the powder particles stored in the inner bag to flow therethrough. Japanese Patent Application Laid-Open No. 4-44985 proposes a method in which a bag is inflated to the storage side of the granular material to thereby gradually reduce the storage volume of the granular material and discharge the granular material. However, in this method, when the container is large, since there is only one outlet for the granular material, high-pressure compressed air for deforming the inner bag in order to discharge a large amount of the granular material is discharged. Is required in large quantities. In addition, it takes a long time to discharge all the stored items, which is not a quick and simple discharge method.

Further, air is blown out from an air slide chamber provided on the bottom surface of the flexible container to the inner bag to fluidize the powder and granules, and the outer bag is inflated by air leaking from the air-permeable inner bag. A method in which the inner bag is lifted and the inner bag is formed in an inclined V-shape to slide down the granules along the V-shaped wall is proposed in Japanese Utility Model Laid-Open No. 6-22278. I have. However, this method uses an air slide device provided at the bottom of the inner bag with a downward slope toward the discharge port when discharging the granular material sliding down along the V-shaped wall, Further, there is a problem that a large amount of air is wasted for two reasons, that is, fluidizing the granular material with air. In addition, since there is only one outlet, there is a problem that it takes time to discharge all the stored items stored in the container.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems without using a large amount of air to fluidize and discharge the powder and granules, and even if the container becomes large in size. The filled contents can be completely discharged,
Accordingly, an object of the present invention is to provide a flexible container capable of reducing the amount of air consumption and discharging the contents quickly and easily.

[0009]

Means for Solving the Problems Here, first, claim 1 is described.
According to the present invention according to the present invention, having an airtight flexible outer bag, and a flexible inner bag stored inside the outer bag,
In a collapsible container containing a fluid in the inner bag without leaking from the inner bag and having only one outlet for discharging the fluid, instead of the only outlet, A plurality of fluid outlet groups are provided at the bottom of the inner bag, and the shape of the lower portion of the inner bag connected to each of the outlet groups has an inclined surface that diverges upward when the stored fluid is discharged. As described above, there is provided a flexible container which is formed independently of each other, and in which the inclination angle of the inclined surface is not less than the angle of repose.

Next, according to the present invention, the compressed air is blown from the air chamber formed between the outer bag and the inner bag at the lower part of the container to the inclined surface of the inner bag. Thereby, the flexible container according to claim 1 having a smaller angle of repose is provided.

According to the third aspect of the present invention, an air chamber formed by compressed air introduced between the outer bag and the inner bag at the lower part of the container is connected above the outlet group. The flexible container according to claim 1 or 2, wherein the shape of the inner bag has a slope that is equal to or larger than the angle of repose that widens upwards.

Further, according to the present invention, the inner bag is expanded outward by the compressed air blown into the inner bag, and the compressed air leaked from the inner bag is used to lower the lower portion of the container. By forming an air chamber between the outer bag and the inner bag, the shape of the inner bag connected above the outlet group has an inclination angle equal to or greater than the angle of repose that widens upward. A flexible container according to claim 1 or 2 is provided.

According to the present invention according to claim 5,
The flexible container according to any one of claims 1 to 4, wherein the inner bag is divided into a plurality of sections for separating stored items.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic view illustrating a case where the flexible container of the present invention is mounted on a cargo bed of an automobile. In the figure, 1 is a flexible container, 10 is an automobile body, 11 is an automobile cargo bed, and 12 is a container. Each mounting base is shown.

Generally, the flexible container (1)
As shown in FIG. 1, a gantry (12) is placed on a carrier (11) of an automobile (10), and is transported to a destination while being placed on the gantry (12).

FIGS. 2 and 3 are a front view and a side view of the flexible container of the present invention, respectively, illustrating a state in which the granular material is stored and transported in the flexible container. However, the figure does not show stored articles such as powders. In the figure, reference numeral 1 denotes a flexible container main body according to the present invention, and the main body (1)
Is composed of at least an inner bag (2), an outer bag (3), an inlet (4), an outlet (5), an outlet valve (6), and an air inlet (8). ) Is mounted on the carrier (11) of the automobile (10) shown in FIG. 1 via the container mount (12), as described above. Here, the container gantry (12) is provided to secure a space for taking out stored items from the bottom of the container body (1).

In the flexible container (1) constructed as described above, the outer bag (3) has a cylindrical basic shape and has an inner bag (2) indicated by a dotted line in the figure. The outer bag (3) and the inner bag (2) are fixed to each other at a portion indicated by reference symbol S. Further, when a plurality of types of powders (in FIG. 2, it is assumed that two types of powders are transferred) are stored in a flexible container and then transported, the powders should be handled accordingly. As shown in FIG. 2, the inner bag (3) is divided into a plurality of sections (9a and 9b) for isolating a plurality of types of powders, so that the powders enter and mix with each other during transfer. Can be transported without.

As the inner bag (2) or the outer bag (3), a woven fabric, a non-woven fabric, a film, or a combination of these materials may be used. That is, a flexible material may be selectively used as appropriate according to the items to be stored in the inner bag (2). If necessary, these materials may be subjected to resin impregnation, resin coating, or the like, and may be subjected to chemical processing or physical processing such as flameproofing, water resistance, and antibacterial. In short, it has an airtight flexible outer bag (3) and a flexible inner bag (2) housed inside the outer bag (3), and the inner bag (2) It is important that the container be a foldable container that stores the powder and granules without leaking.

Here, when air is injected from an air injection port (8) provided in the outer bag (3) below the container body (1), the outer bag (3) expands outward by the injected air. Then, in S, the inner bag (2) fixed to the outer bag (3) is lifted upward. At this time, an air chamber (7) is formed between the inner bag (2) and the outer bag (3), and the outlet group (5)
The shape of the inner bag (2) connected to the upper side is formed so as to have an inclined surface that diverges upward when the stored items are discharged.

Further, when the granular material is put into the container body (1), the granular material is compressed together with the compressed air into the inner bag (2).
Sent to At this time, the inner bag (2) and the outer bag (3) are made of a material that allows air to pass through the inner bag below the fixing point (S) of the outer bag (3) but does not allow the passage of powder and granules. The air chamber (7) is formed between the inner bag (2) and the outer bag (3) by the compressed air passed from the bag (2), and the angle of repose (α) is formed below the inner bag (2). The inclined surface described above may be formed.

However, the inclination angle formed by the above-mentioned inclined surface (FIG. 2)
And θ ′ in FIG. 3) are so small that the powder stored in the inner bag (2) can easily slide down along the inclined surface, whereby the inclined surface is rested. It is necessary to keep the angle (α) or more. At this time, from a slope having a slope equal to or greater than the angle of repose (α),
The inclined surface may be made of a material having a low friction coefficient or coated with an agent having a low friction coefficient (for example, Teflon, silicon, etc.) so that the powder can easily slide down. This is preferable for facilitating discharge of the granules.

The "angle of repose" as used in the present invention is defined as "the angle (θ and θ ') formed by the inclined surface even if the particles do not fall along the inclined surface by forming a bridge with each other. If it is made smaller, it means the minimum angle (α in FIGS. 2 and 3) formed between the horizontal plane and the inclined plane at the time when the granular material falls downward without forming a bridge. Therefore, when the inclined surface becomes larger than the angle of repose (α), all the powder and granular material stored in the upper part of the inner bag (2) slides down along the inclined surface and is discharged from the outlet (5). Becomes

At this time, if the container body (1) is small, an inclination angle larger than the angle of repose (α) can be formed below the inner bag (2) even if there is only one outlet (5). .
However, as shown in FIGS. 2 and 3, when the container body (1) becomes long, the inclination angle for discharging the powdery particles cannot be set to the repose angle (α) or more.
It becomes necessary to provide a plurality of outlet groups (5a to 5c).
Then, the angle of repose (α) diverging upward upward by the number corresponding to each of the outlet groups (5a to 5c) below the inner bag (2) connected above the outlet groups (5a to 5c). It is important to form the above inclined surface. In this way, by opening the discharge valve group (6a to 6c), the powder and granules can be discharged simultaneously from the plurality of discharge port groups (5a to 5c), and the inner bag (2) It is possible to easily and quickly discharge the powder and granules stored in the container.

Also, compressed air is blown from the air chamber (7) formed between the outer bag (3) and the inner bag (2) below the container to the inclined surface of the inner bag (2). Is preferred. By doing so, it is possible to make it easier for the granular material to slide down on the inclined surface and to make the angle of repose (α) easier than when air is not blown out from the inclined surface (7).
Can be made smaller. Here, as an advantage that the angle of repose (α) can be made smaller, the volume of the air chamber (7) for forming the inclined surface can be reduced, and the inner volume of the inner bag is increased by the saved volume. What can be done. That is, as the inner volume of the inner bag increases, more granular material can be filled in the flexible container.

When the discharge of the powder stored in the inner bag (2) is finally completed by the mechanism described above, the air in the air chamber (7) is released, and the container (1) is released. Can be folded. In this way, the return route, which has finished transferring the granular material to the destination by the flexible container, is different from the conventional rigid container in that the flexible container is folded and emptied without emptying the car carrier. You can load luggage in the space.

In the case of a long container such as the embodiment of the present invention shown in FIGS. 2 and 3, a plurality of input port groups (4a to 4a) are used for storing the granular material in the container body (1).
Although it is preferable to provide 4c), it should be added that if the container is filled with the granular material over time, it is not necessary to provide a plurality of inlets, and it is sufficient to provide only one inlet. . However, when a plurality of types of powders and granules are put into one container, the inner bag (2) is partitioned at least by a number corresponding to the plurality of types of powders and the respective partitions. Input port group (4a
Needless to say, it is necessary to provide 4c).

[0027]

As described above, according to the present invention,
It is possible to provide a flexible container that can easily and quickly discharge the contents to be transported with high efficiency without leaving the contents to be transported in the container, and that can greatly reduce the amount of air required for discharging the contents. This has a very large effect.

[Brief description of the drawings]

FIG. 1 is a schematic view illustrating a case where a flexible container of the present invention is mounted on a truck bed.

FIG. 2 is a front view illustrating a flexible container of the present invention.

FIG. 3 is a side view illustrating a flexible container of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flexible container main body 2 Inner bag 3 Outer bag 4a-4c Inlet 5a-5c Outlet 6a-6c Discharge valve 7 Air chamber 8 Compressed air inlet S Fixing point of inner bag and outer bag α Angle of repose θ Angle of inclined surface

Claims (5)

[Claims] 1. An air-tight flexible outer bag and a flexible inner bag housed inside the outer bag so that fluid does not leak from the inner bag. A foldable container housed in said inner bag and having only one outlet for discharging said fluid, wherein a plurality of fluid outlet groups at the bottom of the inner bag instead of said one outlet The shape of the lower portion of the inner bag connected to each of the outlet groups is formed independently so as to have an inclined surface that diverges upward when the stored fluid is discharged, and Flexible container with a surface inclination angle greater than the angle of repose. 2. The angle of repose is further reduced by blowing compressed air from an air chamber formed between an outer bag and an inner bag at a lower portion of the container to the inclined surface of the inner bag. The flexible container according to 1. 3. An air chamber formed by compressed air introduced between the outer bag and the inner bag at the lower part of the container causes the shape of the inner bag connected above the outlet group to move upward. The flexible container according to claim 1 or 2, wherein the flexible container has an inclined surface that is equal to or larger than the angle of repose that widens. 4. The inner bag is expanded outward by compressed air blown into the inner bag, and an air chamber is formed between the outer bag and the inner bag at the lower part of the container by compressed air leaking from the inner bag. The flexible container according to claim 1 or 2, wherein the shape of the inner bag connected above the outlet group has an inclination angle equal to or larger than the angle of repose that expands upward and diverges upward. . 5. The flexible container according to claim 1, wherein the inner bag is divided into a plurality of sections for separating stored items.