JPH1059479A - Flexible container for powdery/granular body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly, easily and completely discharge a content comprising a powdery/granular body without making it remain in a container even when the container becomes larger. SOLUTION: For a flexible container 1 including a housing bag with airtightness and flexibility, and a rigid member 3 which is provided on the bottom part of the housing bag 2, and can change the discharging angle of a powdery/granular body housed in the housing bag 2 to a specified angle, the rigid member 3 has a connecting part which can be bent at least at one location, and also, respective rigid members 3 which are split at the connecting part can be respectively tilted to a specified tilting angle in order to discharge the powdery/granular body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible container (hereinafter, referred to as a flexible container) which can be mounted on a vehicle and thereby can transport a large amount of powder at a long distance at low cost.

[0002]

2. Description of the Related Art Generally, as means for transporting powders such as vinyl chloride and cement, resin pellets, resin chips and the like, there are a method using a metal tank lorry and a method using a flexible container.

In the former method using a metal tank lorry, the method of discharging the contents is roughly classified into a method using an air slide device and a method of tilting the tank itself. Both methods utilize the fact that the metal tank has a large rigidity, and have the features that the filling and discharging of the powder are easy and the durability is long.

[0004] On the other hand, the latter method using flexible containers has the advantage that the transport system is not limited to trucks, wagons, ships, etc., and the container can be folded back compactly after the transportation is completed. Can be loaded separately to improve transportation efficiency. It also has advantages such as light weight and low cost.

As described above, flexible containers are lighter than metal containers, but have the disadvantage of low rigidity. For this reason, for example, Japanese Patent Application Laid-Open No. 57-2048
As disclosed in Japanese Patent Publication No. 85, when the contents stored in the flexible container are discharged, when the entire flexible container needs to be largely tilted so that the contents can be completely discharged, the rigidity of the flexible container is often small. It becomes a problem.

[0006] For these reasons, conventional flexible containers are:
In order to compensate for the lack of rigidity of the flexible container itself, and to respond to the increase in size and width, an air slider is arranged at the bottom of the flexible container without tilting the flexible container at a large inclination angle, and the contents are discharged by this Has been mainly used. However, in such a method, it is necessary to increase the angle of repose (the angle at which the granular material naturally falls),
Powders that are difficult to fluidize, especially resin chips (polyester chips have a shape of about 2x2x4mm and an angle of repose of about 30-40)
(The air volume required for fluidization is 10 times or more that of the PVC powder.) When the resin chips are fluidized, the airflow required by the air slider becomes too large and is not suitable for practical use. Has a big problem.

Furthermore, when flexible containers are used, there are drawbacks in that the discharging operation and the folding operation require manual labor, and are liable to be damaged during handling, transportation, etc., resulting in poor durability. .

[0008]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object to be solved by the present invention is to enable simple and quick complete discharge of hard-to-discharge powder or granular material stored in a flexible rigid container. Another object of the present invention is to provide a flexible container which is easy to carry and has excellent durability.

[0009]

According to the first aspect of the present invention, an airtight and flexible storage bag having a discharge port at the bottom for discharging a granular material; A flexible member provided at the bottom and capable of inclining a discharge angle of the granular material stored in the storage bag at a predetermined angle, wherein the rigid member is capable of being bent at at least one place. , And each of the rigid members divided by the connecting portion can be tilted up to a predetermined tilt angle for discharging the granular material, thereby providing a flexible container for granular material. .

According to the second aspect of the present invention, the rigid member is divided into a central non-inclined portion and inclined portions at both ends thereof, and the rigid member is provided at the bottom of the storage bag located at the central non-inclined portion. The flexible container for a granular material according to claim 1, wherein an air slider and an outlet for the granular material are provided.

According to the third aspect of the present invention, there is provided the granular material according to the second aspect, wherein a substantially parallel groove is provided at a bottom of the non-inclined portion along a folding line of the inclined portion. A flexible container is provided.

According to the fourth aspect of the present invention, there is provided the flexible container for a granular material according to the third aspect, further comprising an air injection nozzle movable along the groove.

According to the present invention according to claim 5,
The flexible container for a granular material according to any one of claims 2 to 4, wherein the angle of inclination of the rigid members constituting the inclined portions at both ends is adjustable.

Finally, according to the present invention according to claim 6,
The flexible container for a granular material according to any one of claims 1 to 5, wherein the rigid member and the storage bag are detachable.

Here, the flexible storage bag is composed of a woven fabric, a non-woven fabric, or the like, but a metal or resin may be used for a part of the flexible storage bag. In consideration of resirk, a woven or nonwoven bag made of polyester fiber is preferable.

[0016]

In the present invention, since the rigid members connected to each other are provided at the bottom of the horizontally long storage bag having airtightness and flexibility so that the right and left portions can be bent inside inward, so that the discharge of powder and granules is achieved. At this time, the right and left rigid bodies can be tilted little by little to bring the powder and granules to the center and to be efficiently discharged from the central outlet. Finally, the left and right rigid bodies are exactly folded into two. By using a flexible container having such a structure, it is not necessary to incline the entire flexible container, and it is possible to efficiently discharge the granular material.

Here, a small amount of the powder or granules accumulated in the central portion is efficiently and completely discharged by an air slider provided at the bottom of the storage bag or an air jet nozzle movable in the direction of the discharge port. The right and left rigid bodies have side surfaces, and the side surfaces are 2
It is fixed so that it is almost parallel when folded and wraps around the flexible container, forming a compact box. In this case, the flexible container portion is shielded from the outside by a rigid body, so that the handling is simple and there is no damage during handling.

Further, the flexible container according to the present invention can be reduced in weight as compared with a conventional flexible container. This is because, in the conventional flexible container, the flexible container must be inclined as a single body, and the entire flexible container must be reinforced with one rigid body so that the powdery material can be completely discharged. Weight acts. Therefore, a rigid body having extremely high rigidity is required, and the weight of the FIBC cannot be reduced more than expected.

On the other hand, according to the present invention, since the left and right rigid bodies are gradually inclined to discharge the powder, the weight of the contents stored in the storage bag needs to be entirely supported by the single rigid body. Since the weight can be shared by the right and left rigid bodies, a lightweight structure can be adopted.

In addition, a fastener that can be firmly fastened to the truck bed can be provided below the rigid body.
Swing of the flexible container during transportation can be prevented, and a flexible storage bag can be easily attached to and detached from the rigid body.

[0021]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic view illustrating a state where the flexible container of the present invention is mounted on a cargo bed of an automobile. In the figure, reference numeral 1 denotes a flexible container, 10 denotes an automobile body, 11 denotes a car bed, and 12 denotes a frame on which the container is mounted.

Generally, a 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- (a) and 2- (b) 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 stored and transported in the flexible container. I have. However, the figure does not show stored articles such as powders.

In the drawing, reference numeral 1 denotes a flexible container main body according to the present invention, and the main body (1)
Are at least a flexible storage bag (2), a rigid member (3), an inlet (4) and an outlet (5) for the powder and granular material, an outlet valve (6), and an air inlet if necessary. (8), and the main body (1) is mounted on the carrier (11) of the automobile (10) shown in FIG. 1 via the container mount (12).

Here, the container gantry (12) is provided to secure a space for taking out stored items from the bottom of the container body (1), and may be integrally formed with the rigid member (3). Good. The rigid member (3) is
Each of the rigid members (3) having a bendable connecting portion at at least one position and divided by the connecting portion is capable of being tilted up to a predetermined tilt angle for discharging the granular material. Further, the rigid member (3) is divided into a central non-inclined portion and inclined portions at both ends thereof, and an air slider portion (described later) is provided at the bottom of the storage bag located at the central non-inclined portion. An outlet (5) for the granular material is provided.

The rigid member (3) forming the inclined portions at both ends is lifted at one end thereof by a lifting device or a tilting device (not shown) such as a hydraulic elevator, so that the granular material can be removed. The FIBC can be tilted to an angle that can be easily discharged. At this time, the inclining device (not shown) can freely set the ascending and descending position stepwise or continuously so that the inclining angle of the rigid members (3) constituting the inclined portions at both ends can be adjusted. Is preferable. Further, it is preferable that the elevating speed can be changed stepwise or continuously so that the speed of forming the inclination can be adjusted.

In the flexible container (1) configured as described above, the basic shape of the storage bag (2) is a horizontally long cylindrical shape, and the inside of the inner bag (7) indicated by a broken line is inside.
In this case, both the outer bag and the inner bag constitute a storage bag. The inner bag (7) is used to avoid contamination due to friction between the granular material and the outer bag, and the outer bag and the inner bag (7) are fixed to each other at a plurality of portions. I have.

Here, the inner bag (7) or the outer bag may be used in the form of a woven fabric, a nonwoven fabric, a film, or a combination of these materials by bonding or the like. That is,
A flexible material may be selectively used as appropriate depending on the storage items to be stored. 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 is essential that the airtight storage bag (2) be a foldable container for storing the powder and granules without leaking.

FIG. 3 is a front view of the flexible container of the present invention illustrating a state in which the granular material is discharged from the flexible container, that is, a state in which the flexible container body is inclined. In this figure, a lifting wire (13) is hung on a lifting tool (9) attached to a rigid member (3) and a lifting device (not shown) is used to quickly and completely discharge the powder and granules. By pulling up the wire (13), the FIBC can maintain an inclination angle at which the powder or granular material is easily discharged. At this time, it is preferable to control the lifting speed and the lifting position in order to control the discharge amount of the granular material without bothering the operator.

FIG. 4 is a front view illustrating the folded state of the flexible container after the discharge of the granular material from the flexible container has been completed. At this time, since the storage bag (2) is covered with the rigid member (3), the storage bag (2) has a structure that is hardly damaged from the outside. Further, since it can be formed in a compact shape, as shown in FIG. 5, it is possible to transport a large number of flexible containers containing no storage items by one automobile.

FIGS. 6 (a) and 6 (b) are front and side cross-sectional views showing a portion where the granular material is discharged from the flexible container. It should be noted that the flexible container shape shown in FIG. 6- (b) is not a horizontally long shape unlike the flexible container shape shown in FIG. 2- (a).

As shown in FIG. 6- (a), the flexible container of the present invention has an air slider. Here, the air slider is a breathable air slider inner bag (7 ').
(Hereinafter, simply referred to as “inner bag”), and is formed by compressed air supplied into the storage bag (2). For this reason, when discharging the granular material from the inside of the container body (1), the granular material is easily transferred to the outlet (5) of the granular material by the action of the compressed air. At this time, air is allowed to pass through the inner bag portion below the fixing point (S) between the inner bag (7 ') and the storage bag (2), but the material is set so as not to pass the powder and granules. Compressed air inlet (1
4), an air chamber is formed between the inner bag (7 ') and the storage bag (2) by the compressed air having entered the inner bag (7'), and an inclined surface is formed below the inner bag (7 '). Is formed, and the compressed air blown from the inner bag (7 ') and the inclined surface efficiently discharge the granular material without remaining.

However, the inclination angle (θ) formed by the above-mentioned inclined surface
Is set so that the powder or granular material contained therein can easily slide down along the inclined surface. However, the angle of inclination is considerably smaller than the angle of repose due to the compressed air blown from the inclined surface. Further, at this time, the inclined surface is made of a material having a low friction coefficient, or an agent having a low friction coefficient (for example, Teflon, silicon, etc.) so that the granular material can easily slide down from the inclined surface. Is preferred in order to facilitate the discharge of the powder.

The "angle of repose" as used in the present invention means "even if the particles and the like do not fall along the inclined surface by forming a bridge with each other, if the angle formed by the inclined surface is increased, When the body falls down without forming a bridge,
The angle formed by the horizontal plane and the inclined surface. Therefore, if the inclined surface becomes larger than the angle of repose even if the compressed air is not ejected from the inner bag (7 '), all the powder particles stored in the upper part of the inner bag (7') slide along the inclined surface. It falls and is discharged from the discharge port (5).

The flexible container shown in FIG. 6- (b) has an air injection nozzle (15) which moves over the entire width of the groove parallel to the folding line at the time of folding. This air injection nozzle (1
5) Stops near the end of the discharge, but finally discharges the powder particles accumulated in the vicinity of the groove while moving over the entire width of the groove.

When the discharge of the powder and granules stored in the storage bag (2) is completed by the mechanism described above, the air in the flexible container is released and the container (1) is folded. Can be done. 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.

[0037]

As described above, according to the present invention,
An extremely significant effect of providing a flexible container that can be easily and quickly discharged without causing the contents to be transported to remain in the container with high transport efficiency, and that can handle the flexible container easily and with improved durability. To play.

[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 and a side view illustrating a flexible container of the present invention.

FIG. 3 is a front view illustrating the discharge of the granular material of the flexible container of the present invention.

FIG. 4 is a front view illustrating a state where the flexible container according to the present invention has been folded after the discharge of the granular material is completed.

FIG. 5 is a schematic view illustrating a case where a plurality of folded flexible containers of the present invention are mounted on a truck bed.

FIG. 6 is a cross-sectional view illustrating a discharge portion of the flexible container of the present invention, wherein (a) is a front view and (b) is a side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flexible container main body 2 Storage bag 3 Rigid member 5 Discharge port 6 Discharge valve 7 Inner bag 7 'Inner bag for air slider 8 Compressed air inlet 14 Compressed air blowing port 15 Air injection nozzle S Between inner bag for air slider and outer bag Fixing point

Claims (6)

[Claims] 1. An airtight and flexible storage bag having a discharge port at the bottom for discharging a granular material, and discharging the granular material provided at the bottom of the storage bag and stored in the storage bag. A flexible container including a rigid member capable of tilting an angle to a predetermined angle, wherein the rigid member has a connecting portion that can be bent at at least one position, and each of the rigid members divided by the connecting portion has powder. A flexible container for a granular material, wherein the flexible container can be tilted up to a predetermined tilt angle for discharging the granular material. 2. A rigid member is divided into a central non-inclined portion and an inclined portion at both ends thereof, and an air slider and a discharge port for the granular material are arranged at the bottom of the storage bag located at the central non-inclined portion. The flexible container for a granular material according to claim 1, wherein 3. The bottom of the non-inclined portion is provided with a substantially parallel groove along a turn line of the inclined portion.
The flexible container for powder or granules according to the above. 4. The flexible container for a granular material according to claim 3, further comprising an air injection nozzle movable along the groove. 5. The flexible container for a granular material according to claim 2, wherein the inclination angle of the rigid members constituting the inclined portions at both ends is adjustable. 6. The flexible container for a granular material according to claim 1, wherein the rigid member and the storage bag are detachable.