JPH10329889A - Flexible container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible container by which the contents are discharged rapidly and efficiently without the remainder and a relatively low capacity blower can be used when discharging them and hence, the investment and running cost can be reduced. SOLUTION: This flexible container 2 is provided with an airtight and flexible external bag 5 and a flexible internal bag 6 contained in the external bag. The internal bag or the flexible container 2 is provided with a discharge opening 12 to discharge a powdery and granular material contained without leakage from the internal bag 6. In this case, the discharge opening 12 is formed with a level difference at the upper side from the bottom face of the flexible container 2. And an airtight and expansible air chamber 8 is formed between the lower part of the bottom B as the sliding face of the powdery and granular material in the interial bag 6 and the inside of the external bag 5 and the bottom B forming the sliding face of the powdery and granular material in the internal bag 6 can be freely raised up to an eliminating position of the level difference by the enlargement of the air chamber 8 resulting from inflow of compressed air into the air chamber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container for accommodating a powder or the like therein and transferring it to a target place. May be abbreviated as ").

[0002]

2. Description of the Related Art Conventionally, as a general transportation method of powders, granules, or powders and granules composed of a mixture thereof (hereinafter, these are collectively referred to simply as "powder and granules"). , Tank lorry type and flexible container type.

Here, in the former tank lorry system,
Tank that is a pressure vessel (hereinafter referred to as “container”)
Has a very high rigidity, so that the shape of the container is always kept constant. Therefore, in this method,
Since the discharge of the granular material can be performed by pneumatic feeding into the tank, there is an advantage that the charging and discharging of the granular material can be performed simply and quickly.

However, in the tank truck system,
Due to the use of a container with high rigidity, the car carrier is occupied by the rigid container, and the return route, which has completed the transport of the granular material, will run with empty loads, and the transport efficiency will be extremely poor. Have a problem.

[0005] On the other hand, in the latter flexible container system, the container can be folded and returned after the end of the transportation of the granular material, whereby the cargo bed of the automobile can be emptied, and another luggage is loaded on the empty cargo bed and returned. There is a transport advantage that you can. However, in contrast to the tank lorry method, this method has a problem in that the powder stored in the container is discharged quickly and without leaving it for the following reasons.

That is, in the case of a rigid container, simply sliding the container downwardly toward the discharge port can form a sliding surface of the granular material without deformation at the bottom of the container. By sliding the granular material along the top, it is possible to discharge the granular material smoothly.

[0007] On the other hand, a flexible container has the advantage of being foldable, but since it is flexible, the sliding surface is very easily deformed when the powdery material is discharged, so that the sliding surface always keeps a downward slope. It is difficult to do so. For this reason, the flexible container has a problem that it is not possible to discharge the powder while smoothly sliding the granular material along the sliding surface.

In addition, in the case of a known flexible container, when an outlet for discharging the granular material is attached to the body of the flexible container, the outlet is often welded or sewn. Therefore, welding or sewing whites (hereinafter, simply referred to as "welding whites") are required, and a discharge port for powders is attached above the welding whites. It is difficult to form the lower end of the opening so as to be flush with the bottom surface of the container, and a step occurs.

For this reason, the known flexible container has a problem that the step portion prevents smooth discharge of the granular material from the flexible container. In addition, there is also a problem that the powder or granules staying in the step portion are not completely discharged because the step becomes an obstacle, and remain in the flexible container to the end.

In order to solve the problems of the conventional flexible container described above, for example, Japanese Patent Application Laid-Open No. 4-102578 proposes a method in which an air slider mechanism is provided at the bottom of the flexible container. However, such an air slider mechanism expands an air slider chamber formed at the bottom of the container, and blows up compressed air from a sliding surface of the granular material to facilitate moving the granular material along the sliding surface. There is a need. For this reason, it is necessary to continuously supply a large amount of high-pressure air to maintain the sliding surface in a constant shape so that the granular material is easy to slide, and a high-pressure and large-flow high-performance blower (or compressor) is required. ) Is required.

[0011] However, high-performance blowers suitable for such applications are expensive and have special specifications, so that it is difficult to easily obtain them at the destination where the granular material is transferred. Therefore, it is essential to transport FIBC by a transport vehicle equipped with such a high-performance blower. As a result, the advantage of the flexible container that the return route can be returned by empty load or another load can be loaded cannot be effectively utilized.

[0012]

In view of the above-mentioned problems,
It is an object of the present invention to provide a flexible container which consumes a small amount of air, can efficiently discharge the powder and granules contained therein without leaving it, and does not use a high-performance blower. To provide.

[0013]

According to the present invention, there is provided a flexible container having an airtight flexible outer bag and a flexible inner bag housed inside the outer bag. Wherein the flexible container has a discharge port opening to the inner bag for discharging the stored granular material without leaking from the inner bag, wherein the discharge port is located above the bottom surface of the flexible container. Along with being provided with steps,
An airtight and scalable air chamber is formed between the lower part of the inner bag, which is the sliding surface of the granular material, and the inside of the outer bag, and the air chamber is provided with compressed air flowing into the air chamber. A flexible container is provided in which the bottom of the inner bag serving as the sliding surface of the granular material can be raised to a position where the step is eliminated by expanding the air chamber.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic side view illustrating a case where the flexible container of the present invention is mounted on a cargo bed of an automobile.
2 denotes a flexible container, and 3 denotes a car bed. Generally, the flexible container 2 is, as shown in FIG.
It is transported to the destination with it placed on top.

In the flexible container of the present invention, the material constituting the inner bag 6 or the outer bag 5 may be a woven fabric, a nonwoven fabric, a film, or a combination of these materials by lamination or the like. That is, a flexible material may be selectively used as appropriate according to the items to be stored in the inner bag 6. 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.

FIGS. 2 and 3 show 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 accommodated and transported inside the flexible container, and FIG. FIG. 4 is a schematic side view showing a state of a flexible container when charging and discharging are performed. However, in each of these figures, stored items such as powders are not described.

In these figures, reference numeral 2 denotes a flexible container, which is a flexible outer bag 5 having airtightness.
Flexible inner bag 6, powder material inlet 7, air chamber 8, pipe 9,
Pipe joints 10a and 10b, discharge valve 11, discharge port 12,
It is configured to include an air supply valve 13 and an air supply pipe 14. It is to be noted that the flexible container 2 is placed on the bed 3 of the automobile 1 shown in FIG.

In the flexible container 2 constructed as described above, the basic shape of the outer bag 5 is cylindrical, and has the same cylindrical inner bag 6 inside thereof. 6 are fixed to each other at a portion indicated by reference symbol S by fusion or sewing by high frequency. Further, an airtight and expandable air chamber 8 having airtightness is formed below the bottom portion B of the inner bag 6 serving as a sliding surface of the granular material, and piping joints 10a and 10b are provided in the air chamber 8 and the outer bag, respectively. And the piping joint 1
0 a and 10 b are connected by a pipe 9. Then, a pipe (not shown) for supplying compressed air from a compressed air source (not shown) outside the flexible container is connected to the pipe joint 10b attached to the outer bag.

In the above-mentioned flexible container, first, compressed air supplied from a compressed air source such as a blower (not shown) is supplied from a pipe joint 10a to a pipe joint 10b via a pipe 9, and an air chamber 8 is formed. Inflate and expand with compressed air. At this time, due to the expansion of the air chamber 8 due to the inflow of the compressed air into the air chamber 8, the bottom portion B of the inner bag 6 serving as the sliding surface of the granular material can be freely raised to a position where the step is eliminated. It is important. This is because the step is eliminated only when the bottom surface B serving as the sliding surface of the granular material of the inner bag 6 moves upward from the lower end of the discharge port 12.

If such a step is not eliminated,
When the granular material is discharged between the outlet 12 and the inner bag 6, the granular material stays. In addition, the particles moving to the entrance of the discharge port 12 come into contact with the particles retained before the entrance of the discharge port 12, thereby slowing down the discharge speed of the particle to be discharged. In addition, as described above, the problem that the staying powder particles remain in the flexible container until the end is caused.

In the FIBC of the present invention described above,
The procedure for discharging the granular material will be described step by step. When the step is eliminated by the expansion of the air chamber 8 as described above, the air supply valve 13 is opened, and air is injected into the inner bag 6 through the air supply pipe 14. Then, the supply air flows into the inside of the flexible container 2 from the air-permeable inner bag 6 and expands the outer bag 5 to the outside, thereby increasing the internal pressure of the flexible container 2. Then, the inner bag 6 fixed to the outer bag 5 is lifted upward by the fixing portion S, whereby the flexible container 2 forms a cylindrical shape. At this time, inner bag 6
The V-shaped slope is formed as shown in FIG. Here, it is necessary that the angle θ of the V-shaped slope is equal to or larger than the angle of repose as shown in FIG. 2 so that the granular material easily slides down.

At this time, as shown in FIG.
Is compressed (approximately θ1 = 20 °) by supplying compressed air to the air jack 4 to inflate the air jack 4.
In this way, by inclining the flexible container 2, the charged powder and granular material is slid on the bottom surface of the inner bag 6, and then the discharge valve 11 is opened to discharge the powder and granular material from the discharge port 12 smoothly.

The container of the present invention is a flexible container that can release the air in the flexible container 2 and fold it when the discharge of the powder and granules stored in the inner bag 6 is completed. Therefore, unlike the conventional rigid container, the return route after the transfer of the granular material to the destination can load the cargo into the empty space by folding the flexible container without emptying the car carrier. It has a great advantage.

[0024]

As described above, according to the present invention,
It is possible to discharge the contents from the flexible container quickly and efficiently without leaving the contents, and in discharging the contents, the blower performance may be relatively low, so that capital investment costs,
This has a very remarkable effect that running costs can be reduced.

[Brief description of the drawings]

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

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

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

FIG. 4 is a side view schematically illustrating a case where contents are charged and discharged from the flexible container of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automobile 2 Flexible container 3 Car carrier 4 Air jack 5 Outer bag 6 Inner bag 7 Input port 8 Air chamber 9 Piping 10a, b Piping joint 11 Discharge valve 12 Discharge port 13 Air supply valve 14 Air supply pipe S Outer bag fixing point θ, θ1 Tilt angle

Claims (1)

[Claims] 1. A flexible container having an airtight flexible outer bag and a flexible inner bag stored inside the outer bag, wherein the flexible container leaks from the inner bag. The container has a discharge port that opens to the inner bag for discharging the stored granules without discharging, and the discharge port is provided with a step above the bottom surface of the flexible container. An air-tight and expandable air chamber is formed between the lower part of the bottom that becomes the grain sliding surface and the inside of the outer bag, and the air chamber is expanded by the inflow of compressed air into the air chamber. A flexible container, characterized in that the bottom portion of the inner bag, which serves as the sliding surface of the granular material, can be raised to a position where the step is eliminated.