JP2007131348A - Flexible container bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible container bag which prevents generation of dust worsening working environment and sometimes giving a bad influence on a human body when the powder contents are discharged and which enables efficient operation. <P>SOLUTION: The flexible container bag prevents generation of dust having the structure that a discharging part at the bottom face has a three-layer skirt structure, wherein the outermost layer skirt 2 holds the contents and the middle layer skirt 3 is integrated with the periphery 7 of the spout of a receiver using a binding cord 5, and the innermost skirt 4 is hung inside the spout of the receiver. A vertical slit 6 is provided on the middle layer skirt 3, and the binding cord 5 to being bound to the periphery of the spout of the receiver is attached to the end of the slit, and the closing and opening operation of the innermost skirt 4 is performed via the vertical slit 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a cylindrical flexible container bag for filling and storing powder and granular materials, pellets, and the like.

For example, the frequency of using flexible container bags to transport a large amount of powders, particles, pellets, and the like such as catalysts and activated carbon is increasing. (For example, refer to Patent Document 1) The flexible container bag is lifted to the upper part of the receiver by a crane or a hoist, and the contents such as powder and pellets are discharged to the receiver inlet by opening the bottom part.

However, dust is easily generated in such a method of opening the bottom surface. Dust deteriorates the working environment and may adversely affect the human body, and generation of dust is not preferable. Further, when discharging the contents from the suspended flexible container bag, the flexible container bag is often urged to discharge by hitting and shaking. Such striking and shaking operations also induce dust generation. For example, when such dust generation occurs in a noble metal-supported powder catalyst, the amount of noble metal lost as dust is a loss that cannot be ignored economically.

In order to solve these problems, Patent Document 2 proposes that dust generation is prevented by providing a valve made of an elastic material at the discharge portion of the flexible container bag.
JP 2004-352288 A JP-A-7-285590

Several equipments have been devised to prevent dust generation during discharge of powder from the flexible container bag, but the cost is high. In addition, flexible container bags are often used in various usage situations, and specific equipment is often restricted. In addition, there is a problem that it takes too much time to discharge the contents in order to be careful of dust generation.

The present invention provides a flexible container bag that has a structure that prevents the generation of dust when discharging the contents of the granular material, discharges the powder that is the contents in a short time, and can be used at low cost under various conditions. The purpose is to do.

In order to achieve the above object, the flexible container bag of the present invention is a flexible container bag having a powder and pellet filling port on the upper surface portion, a discharge port on the bottom surface portion, and a barrel portion having a cylindrical shape. Thus, a three-layer skirt structure is used for sealing the bottom surface outlet.

In order to achieve the above object, the flexible container bag of the present invention has the outermost layer of the three-layer skirt used for sealing the bottom-portion discharge port to hold the content filling during storage and movement, and the intermediate layer is the end portion. It has a vertical slit extending to the bottom surface, has binding strings at two ends, and the innermost layer is cylindrical and has binding strings at the ends.

In order to achieve the above object, the flexible container bag according to the present invention is such that the intermediate layer of the three-layer skirt is bound to the outer periphery of the inlet on the powder receiver side by a string attached to the winding end. It has a structure that integrates the discharge port.

In order to achieve the above object, the flexible container bag of the present invention is operated from the longitudinal slit of the intermediate layer when unbundling the innermost layer of the three-layer skirt, and after the innermost layer is released, the innermost layer is the receiver. It has a structure that goes inside.

In order to achieve the above object, the flexible container bag of the present invention has a circular or polygonal shape cross section of the body portion.

According to the present invention, it was possible to effectively suppress the generation of dust when discharging the granular material, which is the content from the flexible container bag. In the discharge operation using the product of the present invention, even when hitting or shaking, the dust hardly leaked and the dust hardly leaked to the environment. For example, when the present invention is used in a noble metal-supported powder catalyst, loss of expensive noble metal leaked due to dust generation in the conventional product can be prevented, and a great economic effect is recognized.

In the present invention, the bottom discharge part of the flexible container bag has a three-layer skirt structure, and the outermost layer ensures bundling so that the contents do not spill during filling and transportation, and the intermediate layer surrounds the receptacle inlet from the outside to prevent dust generation However, the innermost layer has a structure that hangs down inside the receptacle inlet, so that the powder can be thrown in without splashing outside, improving the prevention of dust generation, and discharging the powder that is the contents Improve sexiness.

In the flexible container bag of the present invention, the intermediate layer of the three-layer skirt structure of the bottom discharge part has a vertical slit extending from the end part to the bottom part, and a string for binding with the receiving port is provided at two end parts of the slit. Have. The intermediate layer is surrounded by the outer periphery of the receptacle inlet at the time of discharging and feeding the powder particles, and the receptacle inlet and the flexible container bag are coupled with the string bound to the two slit end portions. Since the intermediate layer has a skirt structure, it can correspond to various shapes and sizes. Bundling with the receptacle inlet can be done with the attached string to accommodate various shapes and sizes. In addition, since the end of the skirt is bound with the attached string, there is an advantage that the operability is simple.

Through the slit provided in the intermediate layer of the skirt that is bound so as to surround the outer periphery of the receiving port, the innermost layer is released and the granular material begins to be discharged by its own weight. The innermost layer is opened so as to be hung inside the receptacle inlet. In this state, the innermost layer connected to the inner surface of the flexible container bag is hung inside the receiver inlet, and the intermediate layer covers the outer periphery of the receiver, so that generation of dust is prevented. In addition, it is possible to prevent the generation of more effective dust by closing the slit as soon as discharge is started.

FIG. 1 is a schematic view showing the structure of the flexible container bag of the present invention. When filling the granular material as the contents, the innermost layer skirt 4 is bound with the flexible container bag being empty, the intermediate layer skirt 3 is also bound, and finally the outermost layer skirt 2 is bound. The outermost layer skirt 2 is mainly used to maintain the content filling state during storage and transportation.

The flexible container bag filled with the granular material, which is the contents, is lifted by a crane or hoist above the receiving port for discharging. The discharging operation has a structure as shown in FIG. Since the outermost layer skirt 2 mainly functions to hold the contents, the outermost skirt 2 is fully opened during the contents discharging operation. The intermediate layer skirt 3 surrounds the outer periphery of the receiver insertion port 7 and is bundled with the attached binding string 5 to be integrated with the receiver insertion port. Each of the intermediate layer skirt 3 and the binding string 5 has a flexible structure and can be freely bound in accordance with the shape of the receiving port. The opening operation of the innermost layer skirt 4 is performed by putting a hand through the slit portion of the intermediate layer skirt 6. At that time, the innermost layer skirt 4 is fully opened so as to be hung inside the receiving slot. When the powdered fluid that is the contents starts to be discharged by its own weight, the slit portion 6 is closed. If an auxiliary device such as a chuck or a button is attached to the slit 6 to close it, the effect of preventing generation of dust is expected.

The bottom outlet is a three-layer skirt, and the middle skirt is bound to the outer periphery of the inlet on the powder receiver side by a string attached to the winding end, and the receiver and the outlet of the flexible container bag are integrated. Using the flexible container bag having the characteristic structure of the present invention, which can be opened from the longitudinal slit of the intermediate layer skirt and has a structure in which the innermost layer enters the inside of the receiver after the innermost layer is released. When the discharge operation was carried out using 40 kg of the activated carbon-supported powder catalyst as the contents, the time until the entire discharge was 1 minute and a half, which was greatly improved and there was almost no leakage of dust to the environment.

Comparative example

As a comparative example, the bottom outlet is a three-layer skirt, and the intermediate skirt is bound to the outer periphery of the inlet on the powder receiver side by a string attached to the winding end, and the receiver and the outlet of the flexible container bag are integrated. The same structure as in Example 1 except that the opening operation is possible from the vertical slit of the intermediate layer skirt, and the innermost layer enters the inside of the receiver after the innermost layer is released. When a commercially available flexible container bag was used to discharge 40 kg of the precious metal activated carbon-supported powder catalyst as the contents, it took 5 minutes to complete the discharge in an operation taking note of dust generation. Moreover, no dust generation was prevented and a large amount of dust leaked to the environment.

It is a simple bottom part opening figure of one Example of this invention. It is a figure which shows the structure of the bottom face open state at the time of use of this invention, and a receptacle insertion port.

Explanation of symbols

1. Flexible container bag2. 2. Outermost layer skirt Middle layer skirt4. 4. Innermost skirt 5. Receiver tying string 6. Middle layer skirt vertical slit Receiver slot (flange)

Claims (6)

It has a powder and pellet filling port on the top surface, a discharge port on the bottom surface, a cylindrical flexible container bag with a three-layer skirt structure for sealing the bottom surface discharge port Flexible container bag characterized by having. The outermost layer of the three-layer skirt used to seal the bottom outlet discharge port holds the contents filling during storage and movement, and the intermediate layer has vertical slits extending from the end to the bottom and has two ends. The flexible container bag according to claim 1, wherein the flexible container bag has a binding string, the innermost layer has a cylindrical shape, and has a binding string at an end. The intermediate layer of the three-layer skirt is bound to the outer periphery of the inlet on the powder receiver side by a string attached to the winding end, and has a structure in which the receiver and the outlet of the flexible container bag are integrated. Flexible container bag as described. 4. The structure according to claim 1, wherein the innermost layer of the three-layer skirt is unwound from the longitudinal slit of the intermediate layer, and the innermost layer enters the inside of the receiver after the innermost layer is released. Flexible container bag as described in the section. The flexible container bag according to any one of claims 1 to 4, wherein the body section has a circular or polygonal cross section. The flexible container bag according to any one of claims 1 to 5, which is used for transporting, transporting, storing and charging a noble metal activated carbon-supported powder catalyst and activated carbon powder.

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