JPH10273234A - Powder and granular material throw-in/discharge method for flexible container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powder and granular material throw-in/discharge method by which no requirement of a large quantity of air or no use of high performance blower is needed and a cost for equipment and a running cost can be lowered. SOLUTION: In a foldable flexible container provided with a flexible outer bag with airtightness, a flexible inner bag housed inside the outer bag, and a discharge port 7 for discharging a powder and granular material, the powder and granular material is thrown into the inner bag via an inlet 6 without any leakage of the powder and granular material so as to be stored. In a powder and granular material throw-in/discharge method for the flexible container, while an internal pressure P [kg/mm<2> ] of the flexible container is kept so that the following relationship with a weight W [kg] of the stored powder and granular material is satisfied: P>=W/(D×L) (D represents an inside diameter [mm] of the flexible container, L represents a length [mm] of the flexible container), the flexible container is tilted and a downward slant is formed toward the discharge port, 7 so that the powder and granular material is thrown in or discharged.

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 transporting the powder or the like to a target place, and more particularly to a powder or a powder stored in a foldable flexible container. It relates to the method of putting and discharging the body.

[0002]

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

[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 economically discharging the granular material stored in the container.

That is, in a rigid container, the whole container is tilted, whereby it is possible to freely drop and discharge the granular material from the container, whereas in a flexible container, the container is tilted. In this state, a large amount of air is required for fluidizing and charging and discharging the granular material using the air slide function.

[0006] In the method of charging and discharging the granular material using the air slide function, air is blown out from an air slide chamber provided on the bottom surface of a flexible container to an inner bag to fluidize the granular material and simultaneously. The outer bag is inflated by the air leaking from the air-permeable inner bag, thereby lifting the inner bag, and forming the inner bag into an inclined V-shaped shape, so that the granules can be granulated along the V-shaped wall. This is a method of sliding down a body, and is proposed in, for example, Japanese Utility Model Laid-Open No. 6-22278.

However, this method uses an air slide mechanism 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. Therefore, the mechanism is complicated, and further, there is a problem in terms of a storage space because the air slide portion formed at the bottom cannot store the powder and granules.

[0008] Further, since a large amount of air is required, a high-performance blower is required, and there are problems in this aspect in terms of both equipment cost and running cost.

[0009]

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a foldable flexible container with a large amount of air for fluidizing the powder inside the container. It is an object of the present invention to provide a method for charging and discharging powders which does not need to be used and does not require the use of a blower having a high performance as in the prior art, and can reduce equipment costs and running costs.

[0010]

According to the present invention, there is provided an air-tight flexible outer bag, and a flexible inner bag housed inside the outer bag. Injecting and / or discharging the powder and granules of a collapsible flexible container having a discharge port for discharging and storing the powder and granules into the inner bag without leaking the granules from the input port. In the method, the internal pressure P [Kg / mm ² ] of the flexible container is P ≧ W / (D ×
L) (however, D; inner diameter of flexible container [m
m], L: the length of the flexible container [mm]), while tilting the flexible container so as to form a downward slope toward the discharge port, and the granular material is charged and / or charged from the discharge port. Alternatively, there is provided a method for inputting and discharging powders and granules stored in a flexible container characterized by discharging.

[0011]

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 a flexible container according to the present invention is mounted on a cargo bed of an automobile. In the figure, reference numeral 1 denotes a flexible container, 2 denotes an automobile body, and 3 denotes an automobile cargo bed.

In general, the flexible container 1
As shown in (2), the vehicle is transported to the destination while being placed on the carrier 3 of the vehicle 2.

FIGS. 2, 3 and 4 respectively show a front view, a side view, and the loading and unloading of contents of a flexible container, which illustrates a state in which powder and granules are stored and transported inside the flexible container. FIG. However, the figure does not show stored articles such as powders.

In these figures, reference numeral 1 denotes a flexible container main body to which the present invention is applied, and the main body 1 has at least an outer bag 4, an inner bag 5, a powder material inlet 6, and a powder material discharge port. As described above, the main body 1 is configured to include the outlet 7, the discharge valve 8, the air supply port 9, and the fixing belt 10 and is mounted on the carrier 3 of the automobile 2 shown in FIG. 1.

In the flexible container 1 configured as described above, the basic shape of the outer bag 4 is cylindrical,
An inner bag 5 (indicated by a dotted line in the figure) is provided therein, and the outer bag 4 and the inner bag 5 are mutually fused by high frequency, sewn, or glued at a portion indicated by reference symbol S. It is fixed by means such as adhesion.

As the inner bag 5 or the outer bag 4, a woven fabric, a nonwoven fabric, or a film can be used, or these materials may be used in combination 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 5. Also,
If necessary, these materials may be subjected to resin impregnation, resin coating, and the like, and may be subjected to chemical processing or physical processing such as flameproofing, water resistance, and antibacterial.

Here, when air is injected from the air supply port 9, the outer bag 4 expands outward from the injected air, and the internal pressure of the flexible container main body 1 is set to P [Kg / mm ² ] or more. The inner bag 5 fixed to the container body 4 is lifted upward, and the container body 1 is lifted.
Form a cylindrical shape. At this time, the side wall portion of the inner bag 5 may be formed to have a V-shape as shown in FIG. 3, and the angle θ may be set to be equal to or larger than the angle of repose of the granular material.

When the granules are charged into the flexible container main body 1, the granules are sent from the granule inlet 6 together with the compressed air into the inner bag 5. At this time, as shown in FIG.
Is tilted (θ1 = 20 degrees or more) so that the charged powder and granular material is uniformly injected from the powder and granular material discharge port 7 side of the flexible container main body 1.

At this time, the internal pressure P
[Kg / mm ² ] is defined as P ≧ the weight of the granular material [Kg] / (the inner diameter of the flexible container [mm] × the length of the flexible container [mm]) so that the FIBC body 1 is not crushed during the introduction of the granular material. Is essential. Further, at this time, it is important to prevent the flexible container main body 1 from slipping down by the fixed belt 10 as shown in FIG. As other slip-prevention methods, a method of attaching and fixing a fixing belt on the circumference of the flexible container main body 1, a method of installing a stopper at the rear portion of the bed, and preventing the flexible container main body 1 from sliding down can be used.

Next, when discharging the granular material charged into the flexible container main body 1 from the flexible container main body 1, as shown in FIG. 4, the automobile 2 is placed on the slope 11, and the flexible container main body 1 is inclined (θ1). = 20 degrees or more) to form a downward slope toward the discharge port, and the particles are allowed to fall freely and discharged. At this time, in the same manner as when the granular material is charged, the flexible container main body 1 is not crushed, and
It goes without saying that the flexible container main body 1 is prevented from sliding down.

In the present invention, as described above, it is only necessary to use air that simply inflates the flexible container main body 1 at a constant pressure P, and an air slider mechanism for fluidizing the internal powdery material. Does not require a large amount of air to function smoothly. Therefore, unlike the conventional method using the air slider mechanism, a large amount of air is not wasted. Further, since it is not necessary to use a blower having a high performance as in the prior art, it is possible to use a light and small blower, so that a particularly remarkable effect of reducing equipment costs and running costs is achieved.

The container of the present invention is a flexible container capable of releasing the air in the flexible container main body 1 and folding the flexible container main body 1 when the discharge of the powder and granules stored in the inner bag 5 is completed. Therefore, unlike the conventional rigid container, the return path after the transfer of the granular material to the destination is such that the flexible container can be folded and the luggage can be loaded in the empty space without emptying the car carrier. Has the great advantage of becoming

[0023]

As described above, according to the present invention,
When loading and unloading the contents into the flexible container, an air slide mechanism is not adopted as in the past,
Does not require a large amount of air. Therefore, when charging and discharging the contents, the blower may have a relatively low performance, and the structure of the flexible container can be extremely simplified, and a lightweight and small-sized one can be used. Is very remarkable.

[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 charging and discharging of contents stored in a flexible container according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flexible container main body 2 Automobile 3 Car carrier 4 Outer bag 5 Inner bag 6 Granular material inlet 7 Granular material discharge port 8 Discharge valve 9 Air supply port 10 Fixing belt 11 Slope S Fixing point of inner bag and outer bag θ, θ1 Tilt angle

Claims (1)

[Claims] 1. An air-tight flexible outer bag and a flexible inner bag housed inside the outer bag, so that the powder does not leak into the inner bag. In the method of charging and / or discharging a powdery and / or granular material of a foldable flexible container having a discharge port for discharging and storing the powdery material through an input port, the weight W [ Kg], the internal pressure P [Kg / mm ² ] of the flexible container is P ≧ W / (D × L)
(However, D: inner diameter of flexible container [mm],
L; while maintaining the length of the flexible container [mm]), the flexible container is inclined to form a downward gradient toward the discharge port, and the powder and granules are charged and / or charged.
Or a method for charging and discharging powder and granular materials stored in a flexible container.