JPH07134083A - Powder material dispenser, cleaner for inside of powder housing tank and cleaner for pipe body for discharging powder material - Google Patents

Abstract

PURPOSE:To make possible the dispensing of a powder material being divided into multiple kinds of capacity automatically by arranging powder material sampling hoppers, powder material discharging means. striking means. opening/closing means in plurality. CONSTITUTION:Lower openings of respective powder material sampling hoppers 15, 17, 19 and 21 are closed with shutter plates in an opening/closing device. A specified amount of powder material is fed into a powder material housing tank 3 through a dumping pipe 12 from a cyclone 10. A striking plate advances to push the powder material on the bottom surface of the housing tank 3 and first, makes the powder material fall into the powder material sampling hopper 15 for residual monomer measurement. Furthermore, the powder material is struck off to be stored into the powder material sampling hopper 17 for measuring particle size distribution. Then, the powder material is made to fall into the powder material same pling hopper 19 for measuring foreign matters and further into the powder material sampling hopper 21 for preservation to be stored. Then, the powder material is discharged through an excessive powder material discharge pipe 23. Subsequently, the shutter plates are retracted to release the lower opening and the powder material stored in the hoppers 15, 17, 19 and 21 is made to fall into a sample container 55 to sample thereby making automatic dispensing possible without fouling hands of an operator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder sorting device, a powder container cleaning device, and a powder discharge pipe cleaning device. More specifically, the powder is divided into a plurality of capacities and automatically sorted. A powder sorter capable of collecting, a powder sorter capable of sorting powders into a plurality of kinds of volumes and automatically sorting, and further capable of automatically cleaning the inside of a powder storage tank, and Powder sorting that can sort powder into multiple types of capacity and automatically sort, and can also automatically clean the powder storage tank and the powder discharge pipe that discharges the sorted powder Device and
TECHNICAL FIELD The present invention relates to a powder container cleaning device capable of automatically cleaning the inside of a powder container and a powder discharge pipe cleaning device capable of automatically cleaning the outer peripheral surface of a powder discharge pipe discharging powder. .

[0002]

2. Description of the Related Art Conventionally, the quality of various powdery products such as powdery polymer produced by a polymerization process and powdery toner produced by a toner manufacturing process. In order to inspect the product, a certain amount of powdery product was sometimes measured and used as a sample for testing and analysis.

[0003] In the past, a fixed amount of powdery product was measured manually. For example, the mouth of a container with a constant volume is placed directly below the lower opening of the hopper that contains the powder, or a container with a large diameter and a constant volume is located immediately below the lower opening of the hopper, and the lower opening is The part is opened and the powder is dropped into the container. The powder is dropped so that it overflows from the container, and after the powder is contained, the lower opening is closed. Next, the powder piled up in the opening of the container is scraped off by a suitable means such as a scraping rod so that the upper end surface of the powder is aligned with the opening of the container.

In many cases, in addition to collecting the powder in a container and using this as a sample for analysis as described above,
For storage, the powder is collected in another container by the same operation as described above.

Further, in a certain kind of powder manufacturing process, plural kinds of grades of powder may be manufactured. Powder samples may be taken from multiple powder manufacturing processes, and storage samples may be taken. In that case, conventionally, for example, the powder of the first grade is introduced into the hopper from the first powder flow pipe in the first powder manufacturing process for manufacturing the powder of the first grade, and the powder is analyzed from the hopper. Manually collect the powder sample and the powder sample for storage. When collecting the second grade powder from the second powder manufacturing process for producing the second grade powder, when the hopper used for collecting the first grade powder is empty. Utilizing this, the second grade powder is introduced into the hopper from the second powder flow pipe in the second powder manufacturing process. In this way, it is usual to store and collect powders of various grades using one hopper. The use of one hopper to store powders of different grades means that if a powder storage hopper is used for each grade, a space for installing multiple hoppers will be required, and various auxiliary equipment will be installed. This is to solve the industrial problem of having to provide it.

However, even if the equipment can be simplified and the equipment space can be saved as described above, since powders of different grades are stored in the same hopper, they are stored the previous time. There is a troublesome and troublesome problem that the inside of the hopper and the vicinity of the discharge port provided in the hopper must be cleaned every time the type of the powder to be stored changes in order to prevent the contamination by the powder.

The present invention has been completed based on the above circumstances. That is, an object of the present invention is to divide a powder into a plurality of types of volumes and automatically sort the powder, and to sort the powder into a plurality of types of volumes to automatically sort the powder. ,
Moreover, the powder collection device that can automatically clean the inside of the powder storage tank, and the powder can be automatically collected by dividing the powder into a plurality of types of capacities. A powder sorting device capable of automatically cleaning a powder discharging pipe, a powder storing tank cleaning device capable of automatically cleaning the inside of the powder storing tank, and a powder discharging powder. It is to provide a body-discharging pipe cleaning device.

[0008]

The invention according to claim 1 for solving the above problems comprises a plurality of powder collecting hoppers having different volumes and a powder discharging means for discharging excess powder. A powder accommodating tank provided on the bottom surface and a scraper for removing excess powder in the powder accommodating hopper by moving the bottom surface of the powder accommodating tank from the powder discharging means. 3. A powder fractionation device comprising: means and an opening / closing means for opening / closing a powder outlet provided at the bottom of each powder sampling hopper.
In the invention described in (1), the powder containing tank having a plurality of powder collecting hoppers of different volumes and a powder discharging means for discharging the extra powder on the bottom surface, and the bottom surface of the powder housing tank are moved. By doing so, a scraping means for removing excess powder in the powder contained in the powder collecting hopper from the powder discharging means, and opening and closing the powder takeout port provided at the bottom of each powder collecting hopper And a powder suction / removal means for sucking and removing the powder adhering to the inner walls of the powder storage tank and the powder sampling hopper. In the invention according to Item 3, the powder suction / removal means exhausts the suction housing formed to be insertable into and removable from the space in the powder storage tank excluding the scraping means and the suction housing. An exhaust device, and the suction housing is It was provided on the outer wall slightly separated from the inner wall inside the powder storage tank, the bottom surface slightly separated from the bottom surface of the powder storage tank, and the bottom surface of the powder storage tank when inserted into the body storage tank. The hopper accommodating portion that is inserted into the powder collecting hopper and has a wall surface that is separated from the inner wall of the powder collecting hopper and that has a suction port that has a suction port that opens corresponding to the powder discharging port. The powder collecting device according to claim 2, wherein the powder collecting hopper extends downward from the bottom of the powder collecting hopper,
The powder fractionation device according to any one of claims 1 to 3, which comprises a tubular body having an opening at a lower end, and the invention according to claim 5 is provided so as to surround the outer periphery of the tubular body. An outer tube having an opening at its lower end, the upper end of which is closed and which surrounds and opens the powder outlet of the tube, a suction means for sucking gas in the outer tube, and a diameter of the outer tube. A cylindrical tube portion having a larger diameter and an outer tube having a bottom portion, the outer tube being formed so that the outer tube can be inserted into and removed from the cylindrical tube portion, and the bottom portion of the outer tube is a cylindrical tube. When the outer tube is inserted into the inner portion, a gap between the inner circumference of the cylindrical tube portion and the outer circumference of the outer tube and a gap between the inner circumference of the outer tube and the outer circumference of the tubular body are formed so as to be able to communicate with each other. The powder sorting apparatus according to claim 4, wherein the invention according to claim 6 is A suction casing having an outer shape having an outer surface forming a predetermined gap with respect to the inner surface of the suction housing and having a suction port, and suction and exhaust means for exhausting gas in the suction housing. A cleaning device for cleaning the inside of a powder container, characterized in that the invention according to claim 7 is provided so as to surround the outer periphery of a pipe body for discharging powder from the powder outlet, and the upper end portion is closed, An outer tube having an opening at the lower end that surrounds and opens the lower end opening of the tubular body, a suction means for sucking gas in the outer tube, and a cylindrical tube portion having a diameter larger than the diameter of the outer tube. And an outer tube having a bottom,
The outer tube is formed so that the outer tube can be inserted into and removed from the cylindrical tube portion, and the bottom portion of the outer tube has the outer tube inside the cylindrical tube portion. A powder discharge characterized in that, when inserted, a gap between the inner circumference of the cylindrical tube portion and the outer circumference of the outer tube and a gap between the inner circumference of the outer tube and the outer circumference of the tube body are formed to be able to communicate with each other. It is a pipe cleaning device.

[0009]

In the powder dispenser according to the first aspect of the invention, first, the powder outlet is closed by the opening / closing means. Then, from the powder manufacturing process, for example via piping etc.,
The powder is stored in the powder storage tank. The contained powder is contained in a plurality of powder collecting hoppers, and excess powder overflows on the bottom surface of the powder container. The scraping means scrapes off excess powder that is piled up in the opening of the powder storage hopper that opens on the bottom surface of the powder storage tank.
Excess powder is discharged from the powder discharging means. As a result, in the powder collecting hopper, the scraped surface of the powder contained therein is flush with the opening opening to the bottom surface of the powder container. Since the respective internal volumes of the plurality of powder sampling hoppers provided in this powder container are preset, the powder of the predetermined volume to be sampled is collected by the scraping process by the scraping means. It will be stored in the hopper. When the powder takeout port provided at the bottom of the powder collecting hopper is opened by the opening / closing means, the powder in the powder collecting hopper can be taken out to the outside.

As described above, a predetermined volume of powder can be automatically collected.

According to a second aspect of the present invention, in the same manner as in the first aspect of the present invention, after a plurality of predetermined volumes of powder are automatically sampled, Before the powder is automatically collected by the same operation, the inside of the powder container is cleaned as follows.

That is, after the powder in the powder sampling hopper is sampled from the powder outlet into the external sampling container, it is attached to the inner wall of the powder container and the inner surface of the powder sampling hopper by the powder suction means. Remove residual powder by suction. The powder suction means is not particularly limited in its specific structure as long as it can suck and remove the residual powder adhering to the inner wall of the powder container and the inner surface of the powder sampling hopper. It is preferable to employ the configuration described in claim 3.

When the powder suction / removal device has the structure described in claim 3, the suction housing is housed in the powder housing tank. At this time, the suction housing has a shape that follows the internal shape of the powder container. Therefore, the suction housing housed in the powder storage tank has an outer wall slightly separated from the inner wall in the powder storage tank, a bottom surface slightly separated from the bottom surface of the powder storage tank, and It has a wall surface that is inserted into the powder collecting hopper provided on the bottom surface and is slightly separated from the inner wall of the powder collecting hopper. The inside of the suction casing is exhausted by the exhaust device. For example, the gap between the inner wall of the powder storage tank and the outer wall of the suction housing, the gap between the bottom surface of the powder storage tank and the outer bottom surface of the suction housing, and the inner wall of the powder sampling hopper and the powder sampling hopper are charged. The gas existing outside the powder container circulates as a high-speed airflow through the gap between the suction housing and the outer wall surface of the suction housing and the powder take-out port, and from the suction port in the suction housing into the suction housing. Circulate. At this time, the powder remaining on the inner wall, the bottom surface, the inner wall of the powder sampling hopper, and the inner wall of the powder outlet is entrained with the high-speed air stream and sucked into the suction housing. Then, the powder outlet is closed by the opening / closing means. Then, the exhaust device continues to exhaust the inside of the suction housing. As a result, for example, the gap between the inner wall of the powder container and the outer wall of the suction housing, the gap between the bottom surface of the powder container and the outer bottom surface of the suction housing, and the inner wall of the powder sampling hopper and the powder sampling hopper. The gas existing outside the powder storage tank flows as a high-speed airflow through a gap between the suction housing and the outer wall surface of the suction housing, and flows from the suction port of the suction housing into the suction housing. At this time, the powder remaining on the inner wall and bottom surface of the powder container and the inner wall of the powder sampling hopper is guided into the high-speed air stream and sucked into the suction housing. By sucking the inside of the suction casing for a predetermined time, all the powder adhering to the inner wall of the powder storage tank is sucked and removed. The powder outlet may be closed by the opening / closing means from the time when the exhaust device starts exhausting the inside of the suction housing.

When the powder residue from the previous sampling is removed from the inner wall, the bottom surface of the powder container and the inner wall of the powder sampling hopper, the same as in the powder sorting apparatus described in claim 1 above. Depending on the operation, the following powder sorting operation is performed.

According to the powder sorting device of claim 2,
It is possible to automatically collect a powder of a predetermined volume, and if necessary, a powder of a different predetermined volume, and when the powder is automatically collected repeatedly, the inside of the powder container is automatically cleaned. It is possible to prevent contamination of the powder to be collected with the powder collected last time.

In the powder collecting apparatus according to the fourth aspect, the powder take-out port in the powder collecting hopper is opened at the lower end of the tubular body extending from the bottom of the powder collecting hopper. With this structure, it is easy to take out the powder from the powder sampling hopper.

According to a fifth aspect of the present invention, there is provided a powder sorting apparatus, wherein after the powder is sorted in the same manner as the powder sorting operation in the powder sorting apparatus according to the first aspect, the powder sorting apparatus is also used. After performing the automatic cleaning operation in the powder container in the powder sorting apparatus described in, before the automatic cleaning operation, or during the automatic cleaning operation, the tube body is automatically cleaned as follows. Do the operation.

That is, after collecting the powder from the tube,
The powder outlet is closed by the opening / closing means. Next, the outer tube is attached to the outer tube. That is, the outer tube is inserted into the cylindrical tube portion, and the outer tube is attached to the outer tube so that the opening of the outer tube reaches the bottom of the outer tube. In this state, the gap between the inner circumference of the cylindrical tube portion and the outer circumference of the outer tube and the gap between the inner circumference of the outer tube and the outer circumference of the tubular body are in communication with each other. The inside of the outer tube is sucked and exhausted by the suction means. Air from the outside world flows into the gap between the inner circumference of the cylindrical tube portion and the outer circumference of the outer jacket at high speed, and the inflowing airflow flows into the clearance between the inner circumference of the outer jacket and the outer circumference of the tubular body at high speed. It is exhausted by the suction means.
The flowing high-speed air flow sucks and removes the powder adhering to the outer periphery of the pipe body.

When the removal of the powder adhering to the outer periphery of the tubular body by being guided by the high-speed air flow generated by the suction means is completed,
Exhaust by the suction means is stopped. Remove the outer tube from the outer tube and return to the next powder collecting operation.

According to the powder sorting apparatus of the fifth aspect, it is possible to automatically collect a powder having a predetermined volume, if necessary, a plurality of powders having different predetermined volumes. When the powder is automatically sampled repeatedly, the inside of the powder container is automatically cleaned, so that the powder to be sampled can be prevented from being contaminated by the powder of the previous sample. The powder residue attached to can be automatically removed.

The cleaning device for cleaning the inside of the powder container according to claim 6 cleans the inside of the powder container as follows.

That is, the suction housing is inserted into the powder container. By inserting the suction housing having an outer shape that conforms to the inner shape of the powder housing tank into the powder housing tank, a gap is created between the outer peripheral surface of the suction housing and the inner wall of the powder housing tank. Therefore, when the inside of the suction housing is exhausted by the suction / exhaust means, the air becomes a high-speed air stream from the outside into the suction housing through the gap formed by the outer peripheral surface of the suction housing and the inner wall of the powder container. Inflow. The powder residue attached to the inner wall of the powder storage tank is also sucked into the suction housing by being guided by the high-speed air flow. If this suction operation is continued for a predetermined time, the powder residue adhering to the inner wall of the powder container will be removed.

After that, the driving of the suction / exhaust means is stopped, and the suction housing is taken out of the powder container.

The cleaning device for cleaning the inside of the powder storage tank can be applied to the cleaning of the inner wall of any powder storage tank as long as the powder storage tank has a function of temporarily storing the powder and then discharging the powder. it can. This powder container cleaning device is particularly preferably applied to the powder sorting device of the present invention.

When the powder container cleaning device is applied to the powder collecting device of the present invention, the powder collecting device of the present invention comprises a plurality of powder collecting hoppers having different volumes. Since this is equipped with a powder outlet, this powder container cleaning device is preferably equipped with an opening / closing means for opening and closing the powder outlet.

The case of cleaning the inside of the powder container in the powder sorting apparatus equipped with the powder sampling hopper is as described above. In detail, after the suction housing is inserted into the powder container, the suction housing is forcibly evacuated by the suction / exhaust means with the powder take-out port opened, and the predetermined time has passed. After that, the powder outlet may be closed by the opening / closing means and the forced evacuation of the suction housing by the suction / exhaust means may be continued for a predetermined time. The powder outlet may be closed by the opening / closing means before the housing is forcibly sucked and discharged by the suction and exhaust means, and then the suction and exhaust in the suction housing may be started.

Since this powder container cleaning device can automatically clean the inside of the powder container, the complexity of cleaning the inside of the powder container by manual operation is eliminated.

The powder discharging pipe cleaning device according to the seventh aspect cleans the powder discharging pipe as follows.

That is, the outer tube is inserted into the cylindrical tube portion of the outer tube until the bottom of the cylindrical tube portion reaches the powder outlet of the tubular body. At this time, the powder take-out port in the tubular body is closed by the closing means.
Then, the gas in the outer tube is forcibly sucked and discharged by the suction means. Since a gap is formed between the inner circumference of the cylindrical tube portion and the outer circumference of the outer tube, and the gap is in communication with the inner circumference of the outer tube and the outer circumference of the tubular body, the forced suction / exhaust is performed. Thus, the gas flows from the outside through the gap as a high-speed airflow. By this high-speed flowing gas, the powder residue attached to the outer periphery of the pipe body is removed along with it.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. It is needless to say that the present invention is not limited to the following embodiments and can be appropriately modified in design within the scope of the gist of the present invention.

FIG. 1 is an explanatory view showing a simplified front view of a powder sorting apparatus which is an embodiment of the present invention. In FIG. 1, for example, a frame, a supporting member and the like for supporting each part of the powder sorting apparatus are omitted, and a part necessary for explaining the present invention is shown as a schematic view. Therefore, the present invention should not be understood as being limited to the contents shown in the drawings.

This powder sorting device is a device capable of automatically collecting, as four types of samples, polymer powders produced in a polymerization process for producing polymers such as polyvinyl chloride. As these four types of samples, for example, a sample for residual monomer measurement used for measuring the amount of monomers remaining in the produced polymer powder, and a particle size distribution of the produced polymer powder are measured. In order to store the sample for powder particle size measurement, the sample for measuring foreign particles present in the produced polymer powder and, if necessary, to quantify it, and the polymer produced. There is a storage sample that will be collected. Depending on the case, in this embodiment, with this powder fractionation device, a sample for measuring residual monomer of about 25 cc, a sample for measuring particle size of powder of about 25 cc, about 600 c
A foreign matter measurement sample of c and a storage sample of about 600 cc are collected.

As shown in FIG. 1, the powder sorting apparatus 1 of the present invention includes a powder supply line 2, a powder storage tank 3, and a scraping device 4 which is also an example of the scraping means in the present invention.
(See FIG. 2), an opening / closing device 5 (see FIG. 4) that is also an example of the opening / closing means in the present invention, a cleaning device 6 in the powder storage tank, and a cleaning device 7 for cleaning the powder discharge tube (see FIG. 4). With.

The powder supply line 2 has three supply lines. Each of the supply lines is, for example, a pipe (not shown) for transporting the powdery polymer collected from a mother pipe for transporting the powdery polymer produced by the polymer polymerization process, and the powdery polymer transported by the pipe is temporarily provided. The sampling hopper 9 to be stored, and the cyclone 10, which is provided so as to be continuous with the lower opening of the sampling hopper 9, receives the powdery polymer in the sampling hopper 9, precipitates it, and collects it, the lower opening of the cyclone 10. The part has a charging pipe 12 for charging the collected powdery polymer into the powder storage tank 3, which is connected via a ball valve 11.

As shown in FIGS. 2 and 3, the powder container 3 has a substantially rectangular parallelepiped inner surface whose upper surface is open. A space for accommodating the scraping plate 13 and the support 14 supporting the scraping plate 13 in the scraping device 4 to be described later is provided near the one end on the bottom surface of the powder container 3, and the remaining space is used for residual monomer measurement. Opening portion 16 of powder collecting hopper 15 for measuring residual monomer for collecting a sample, opening portion 18 of powder collecting hopper 17 for measuring particle size distribution for collecting a sample for measuring particle size distribution, foreign matter measuring for collecting a sample for measuring foreign matter Opening 20 of powder sampling hopper 19, opening 22 of storage powder sampling hopper 21 for sampling storage sample, and excess powder discharge pipe 23
The openings 24 are open in a line at predetermined intervals.

On the lower surface of the bottom of the powder container 3, a powder collecting hopper 15 for measuring residual monomer, which is a tubular body, and a powder collecting hopper 17 for measuring particle size distribution, which is a tubular body, are in an inverted cone shape or a funnel shape. Powder collecting hopper 19 for measuring foreign matter
, And an inverted conical or funnel-shaped storage powder collecting hopper 21 are provided, respectively. Also,
Excess powder discharge pipe 2 provided on the bottom surface of the powder container 3
3 extends from the bottom surface of the powder container 3. The surplus powder discharging pipe 23 is an example of the surplus powder discharging means in the present invention, and is also a component.

In the powder containing tank 3, the bottom surface not provided with the various openings is a scraping plate 13 having a substantially V shape when viewed from above, and the scraping plate 13. A support body 14 for supporting is accommodated. Both end sides of the scraping plate 13 facing the inner wall of the powder container 3 in the longitudinal direction contact the inner wall of the side surface in the longitudinal direction, and the lower end of the scraping plate 13 facing the bottom surface of the powder container 3 is The shape and dimensions of this scraping plate 13 are designed so as to contact the bottom surface thereof. The support 14 is
The upper end surface is connected to the lower end surface of the support plate 25 located above the opening of the powder container 3. The support 14 is suspended from the lower end surface of the support plate 25. One end of the support plate 15 is higher than the opening of the powder storage tank 3, and further on a rail 26 arranged outside the powder storage tank 3 in parallel with the longitudinal direction of the powder storage tank 3, Slidably coupled. The support plate 15 is moved on the horizontal rail 26 by a driving means (not shown),
By moving on the horizontal rail 26, the scraping plate 13 can be moved from one in the powder container 3 to the other in which the opening of the excess powder discharge pipe 23 is opened.

The opening / closing device 5, which is also an example of the opening / closing means in the present invention, has a powder collecting hopper 15 for measuring residual monomer, a powder collecting hopper 17 for measuring particle size distribution, and a powder for measuring foreign matter, as shown in FIG. Lower hoppers 27 of each of the collection hopper 19 and the storage powder collection hopper 21.
And a shutter plate driving device 29, for example, an air cylinder, which drives the shutter plate 28 to open and close the lower opening 27.

The powder accommodating tank cleaning device corresponds to an example of the powder suction / removal means according to claim 2 of the present application. In other words, FIG. 5 and FIG. 6 show an apparatus in which one embodiment of the cleaning device for cleaning the inside of the powder storage tank according to claim 5 of the present application is applied to an example of the powder suction / removal means according to claim 2 of the present application. However, FIGS. 5 and 6 show the main parts of the powder suction / removal means or the powder container cleaning device, and various connecting means such as bolts and nuts and frames that are usually used as a mechanical structure. Etc. or electrical wiring etc. are omitted.

As shown in FIGS. 5 and 6, the cleaning device 6 for cleaning the powder container is provided with a suction housing 30 and the suction housing 3.
Suction housing moving device 31 for inserting and taking out 0 into the powder storage tank 3, and exhaust device 3 for exhausting the inside of the suction housing 30.
2 and.

The suction housing 30 is provided in a space provided in the powder housing tank 3 when the scraping plate 13 and the support body 14 are housed on one end side of the powder housing tank 3. Has a shape of an outer peripheral surface that follows the inner wall surface of the powder container 3 so that a space is formed between the outer surface of the suction housing 30 and the inner surface of the suction housing 30. Specifically, a longitudinal outer wall surface 34 having substantially the same shape as the longitudinal inner wall surface 33 (see FIG. 2) of the powder container 3 is provided, and the outer wall surface 35 facing the scraping plate 13 is similar to the scraping plate 13. It has a V-shaped wall shape.

On the bottom surface of the suction casing 30, when the suction casing 30 is accommodated in the powder accommodating tank 3, the suction casing 30 is accommodated in the powder sampling hopper 15 for measuring residual monomer, and is used for measuring the residual monomer. A first hopper accommodating portion having an outer peripheral surface that follows the inner peripheral surface of the powder sampling hopper 15 and forms a slight gap with respect to the inner peripheral surface, and has a suction opening at the lower end, and the particle size distribution. It is housed in the measuring powder collecting hopper 17, has an outer peripheral surface that follows the inner peripheral surface of the particle size measuring powder collecting hopper 17 and forms a slight gap with respect to the inner peripheral surface, and has a lower end portion. The second hopper accommodating portion 37 that opens the suction opening and the foreign matter measuring powder sampling hopper 19 are accommodated, and the foreign matter measuring powder sampling hopper 19 is accommodated.
A third hopper having an outer peripheral surface that follows the inner peripheral surface of the nozzle and forms a slight gap with respect to the inner peripheral surface, and thus has an inverted conical or funnel-shaped outer surface and has a suction opening at the lower end. It has an inner housing portion 38 and an outer peripheral surface that is housed in the storage powder sampling hopper 21 and follows the inner peripheral surface of the storage powder sampling hopper 21 and forms a slight gap with respect to the inner peripheral surface. Accordingly, it has an inverted conical or funnel-shaped outer surface, and has a fourth hopper accommodating portion 39 having a suction opening at the lower end. A plurality of bottom surfaces of the suction housing 30 are arranged so that the bottom outer surface of the suction housing 30 does not come into close contact with the bottom surface of the powder housing tank 3 when the suction housing 30 is housed in the powder housing tank 3. The stopper 40 is provided at an appropriate position.

Inside the suction casing 30, a small casing 41 is arranged to cover the entire opening of the first to fourth hopper internal accommodating portions 36, 37, 38 and 40. A suction tube 42 is attached to the small casing 41. This suction tube 42 is used for the suction housing 3
0 is connected to an exhaust pump (not shown).

The suction housing moving device 31 is composed of a pair of vertical rails 43 standing upright vertically outside the longitudinal ends of the suction housing 30 and the powder container 3, and the vertical rails 43. A moving body 44 that moves the moving body 44, a coupling support member 45 that couples the suction housing 30 to the moving body 44, and a driving unit (not shown) that drives the moving body 44 up and down.
The suction housing 30 has the upper end portion in the longitudinal direction thereof coupled with the coupling support member 45.

FIG. 4 shows an example of the powder discharge pipe cleaning device according to claim 6 of the present application, and the powder discharge pipe cleaning device is an embodiment of the present invention. Here is an example applied to.

The powder discharging pipe cleaning device 7 in this embodiment comprises a powder sampling hopper 15 for measuring residual monomers, a powder sampling hopper 17 for measuring particle size distribution, a powder sampling hopper 19 for measuring foreign matter, and a storage. It is provided in the lower opening 27 of each of the powder sampling hoppers 21.

As shown in FIG. 4, the powder discharging pipe body cleaning device 7 has an outer tube having an inner peripheral surface with a predetermined gap from the outer periphery of a tube body 46 having a powder outlet at the bottom. 47
And, as also shown in FIG. 7, an outer tube 48 is provided.

The tube body 46 extends downward from an opening opening at the bottom of the various powder collecting hoppers 15, 17, 19, and 21, and the various powder collecting hoppers 15 and 1 are provided.
An opening / closing device 5 is interposed near the lower portions of 7, 19, 21.

The mantle tube 47 is provided so as to surround the outer circumference of the tube body 46, the upper end portion is closed, and the opening portion 50 that surrounds and opens the powder outlet 49 of the tube body 46 is provided at the lower end portion. Have. In the vicinity of the closed upper end of the outer tube 47, a suction pipe 5 connected to a suction device (not shown).
1 is installed.

The outer tube 48 has a cylindrical tube portion 52 and a bottom portion 53 having a diameter larger than that of the outer tube 47.
In addition, the outer tube 47 is formed so as to be insertable into and removable from the cylindrical tube portion 52, and when the cylindrical tube portion 52 is not inserted into the outer tube 47, the powder outlet 49 The rib 53 can be arranged at a position retracted from directly below, and the bottom portion 53 of the outer tube 48 is provided with one rib 54 that crosses the bottom plane.

It should be noted that the powder collecting hopper 15 for measuring residual monomer, the powder collecting hopper 17 for measuring particle size distribution, the powder collecting hopper 19 for measuring foreign matter, and the powder collecting hopper 21 for storage are respectively provided in the lower openings 27. A container mounting table 56 on which a sample container 55 can be mounted is disposed below the powder outlet 49 of each of the provided tubes 46, and spilled powder is disposed below the container mounting table 56. A guide hopper 58 is provided for receiving the powder and guiding it to the powder receiving container 57 arranged below.

The operation of the embodiment having the above configuration will be described below.

First, the initial state is as follows. A kind of sampling hopper 9 in the powder supply line 2 of 3 systems
It is assumed that the powder stored inside is supplied to the cyclone 10. Powders of different grades are also stored in the powder supply lines 2 of the other two systems. The suction housing 30 is drawn out to the upper part of the powder container 3. The scraping plate 13 is attracted to one end side of the powder container 3. Four sample containers 5 are provided on the upper surface of the container mounting table 56.
5 are arranged. The lower opening 27 of each of the powder collecting hoppers 15, 17, 19, 21 is closed by a shutter plate 28 by the opening / closing device 5.

After the initial state is completed, a predetermined amount of powder is charged from the cyclone 10 through the charging pipe 12 into the powder container 3. The powder feeding position in the powder container 3 is preferably immediately before the scraping plate 13 that is pulled to one end side in the powder container 3. In addition, the predetermined amount of powder to be charged is usually the powder sampling hopper 15,
This is an amount exceeding the total internal volume of 17, 19, and 21.

When the powder is put into the powder container 3, the driving device (not shown) moves the support plate 1 on the horizontal rail 26.
5 advances, whereby the scraping plate 13 advances in the powder container 3. As the scraping plate 13 moves forward, the scraping plate 13 pushes the powder on the bottom surface of the powder container 3. The powder pushed forward first falls into the powder sampling hopper 15 for measuring residual monomer, and when the scraping plate 13 is still advanced, the upper surface of the powder filled in the powder sampling hopper 15 for measuring residual monomer rubs. Cut off. By this scraping, the powder having a volume corresponding to the volume is stored in the powder collecting hopper 15 for measuring residual monomer. When the scraping plate 13 further advances, next, the powder is dropped into the powder sampling hopper for particle size distribution measurement, and the scraping plate 13 further advances to fill the powder sampling hopper 17 for particle size distribution measurement. Scrape off the powder.
By this scraping, the powder having a volume corresponding to the volume is stored in the powder sampling hopper 17 for particle size distribution measurement.
By the forward movement of the scraping plate 13 in this manner, the powder pushed by the scraping plate 13 falls into the powder collecting hopper 19 for foreign matter measurement, is filled, and is scraped off into the powder collecting hopper 19 for foreign matter measurement. The stored powder is stored in the storage powder collecting hopper 21 in the same manner. When the scraping plate 13 that has passed over the opening of the preserving powder collecting hopper 21 further advances, the surplus powder is discharged from the surplus powder discharging pipe 23. After the excess powder is discharged from the excess powder discharge pipe 23, the scraping plate 13 moves backward and returns to the original position.

Then, the opening / closing device 5 is driven to retract the shutter plate 28, thereby opening the lower opening 27. When the lower opening 27 is opened, the powder stored in each of the powder collecting hoppers 15, 17, 19, 21 drops into the sample container 55 and is collected.

As described above, a fixed volume of powder is automatically collected in the sample container 55.

After the above-described sample collecting operation is performed, the bottom surface of the powder container 3, the inner peripheral wall surface, the inner surfaces of the four powder collecting hoppers 15, 17, 19, 21 and the tubular body 4.
The powder adheres to the outer peripheral surface of 6 and the like.

In order to remove these residual adhered powders,
The powder accommodating tank cleaning device 6 and the powder discharge pipe cleaning device 7 operate as follows.

That is, the opening / closing device 5 is driven to close the lower openings of the powder sampling hoppers 15, 17, 19, 21 with the shutter plate 28. The suction housing 30 retracted above the powder storage tank 3 is lowered by the moving body 44 moving down on the vertical rail 43 by a drive device (not shown), and is inserted into the powder storage tank 3. . The lowering of the suction housing 30 is stopped when the stopper 40 reaches the bottom surface of the powder container 3. The suction housing 30 is inserted into the powder container 3,
In the state of being accommodated, the first hopper-internal accommodating portion 36 is accommodated in the residual monomer measuring powder sampling hopper 15, and the second hopper-internal accommodating portion 37 is accommodated in the particle size distribution measuring powder sampling hopper 17. The third in-hopper housing portion 38 is housed in the foreign matter measuring powder sampling hopper 19, and the fourth in-hopper housing portion 39 is housed in the storage powder sampling and collecting hopper 21. Then, between the outer peripheral side surface of the suction housing 30 and the inner peripheral side surface of the powder housing tank 3, between the outer surface of the bottom of the suction housing 30 and the bottom surface of the powder housing tank 3, and the inside of each hopper housing portion 36. , 37, 38, 39 and the inner surfaces of the powder collecting hoppers 15, 17, 19, 21 respectively. Then, an exhaust pump (not shown) is driven to exhaust the inside 41 of the small housing through the suction pipe 42. As a result, the air outside the powder container 3 is
The air is exhausted through the openings below the accommodating portions 36, 37, 38, 39 in the hoppers and the inside of the small housing 41.
At this time, since the air passing through the gap becomes a high-speed airflow and flows, the inner wall surface of the powder container 3, the bottom surface thereof,
The residual adhered powder adhering to the inner surface of each of the powder collecting hoppers 15, 17, 19, and 21 is forcibly peeled off, guided by the high-speed airflow, and discharged from the suction pipe 42. By continuing the drive of this exhaust pump for a certain period of time, the inner surface of the powder container 3 and each powder sampling hopper 1
The powder remaining on the inner surfaces of 5, 17, 19, 21 can be removed.

On the other hand, while the powder container cleaning device 6 is being driven, or the powder container cleaning device 6 is being driven.
After the powder removal by the above is completed, the powder discharge pipe cleaning device 7 is operated as follows.

That is, the opening / closing device 5 is driven to close the powder outlet 27 with the shutter plate 28. Next, the outer tube 47 that has been retracted from directly below the powder outlet 27 is moved to directly below the powder outlet 27, and thereafter,
The exterior tube 48 is raised by a drive device (not shown). The ascent of the outer tube 48 is stopped when the rib 54 provided at the bottom of the outer tube 48 comes into contact with the powder outlet 27 of the tube body 46. In this state, a gap is formed between the inner peripheral surface of the cylindrical tube portion 52 and the outer peripheral surface of the outer jacket tube 47. Moreover, the rib 54 provided on the bottom portion 53 of the outer tube 48
Since the powder take-out port 27 and the powder take-out port 27 are in contact with each other, there is a gap between the powder take-out port 27 and the bottom portion 53 of the outer tube 48. Therefore, the space formed by the inner peripheral surface of the cylindrical tube portion 52 and the outer peripheral surface of the outer tube 47 and the space formed by the outer peripheral surface of the tube body and the inner peripheral surface of the outer tube 47 are in communication with each other. ing. Therefore, a suction device (not shown) is driven to forcibly suck and exhaust the air in the space formed by the outer peripheral surface of the tubular body 46 and the inner peripheral surface of the outer tube 47 via the suction pipe 42. Then, the air outside the outer tube 48 may have a gap formed between the inner peripheral surface of the outer tube 48 and the outer peripheral surface of the outer tube 47, the bottom portion of the outer tube 48, the outer peripheral surface of the tubular body, and the inner surface of the outer tube 47. It flows at high speed through the gap formed by the surface. Since the air that has become the high-speed airflow passes through the gap, the residual powder that adheres to the outer peripheral surface of the tubular body 46 along with the high-speed airflow is removed. By driving the suction device for a certain time, the tubular body 4
The residual powder adhering to the outer peripheral surface of 6 is completely removed by the high-speed air flow.

When the residual powder adhering to the outer peripheral surface of the tube body 46 is removed, the driving of the suction device is stopped, the outer tube 48 is lowered, and the outer tube 48 is retracted to its original position.

When the inner surface of the powder storage tank 3 and the outer peripheral surface of the tube body 46 are cleaned by the above operation, the above-mentioned initial state is restored, and the portion inside the powder storage tank 3 from the second cyclone 10 is restored. The above-described operation of charging a fixed amount of powder and separating the powder is performed.

As described above, when the sorting apparatus of the present invention is used, the powder can be sorted into several volumes, and after the sorting, the inside of the powder container 3 and the outer peripheral surface of the tubular body 46 are separated. Since the powder adhering to the powder is removed, the powder to be collected next is not contaminated by the powder remaining in the previous powder collecting operation.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various design changes can be made within the scope of the present invention.

The powder suction / removal means according to the present invention may have various design changes as long as it adopts a mechanism capable of removing the residual powder adhering to the powder container together with the suction of gas. .

For example, as another example of the powder suction / removal means in the present invention, a suction / sweep means for sweeping the inner wall surface of the powder container while sucking air near the inner wall surface of the powder container is provided. A configuration can also be adopted. As a specific example of the powder suction / removal unit configured to include the suction / sweep unit, for example, the powder suction / removal unit shown in FIG. 8 can be cited.

As shown in FIG. 8, the powder suction / removal means 60 includes a sweep housing 61, a driving means (not shown) for driving the sweep housing 61, and a suction / exhaust means (entire means). (Not shown).

The sweep housing 61 is formed of the powder container 3
The inner wall surface 33 in the longitudinal direction of the powder container 3 when housed inside
Provided on the side surfaces facing each other with a slight gap between them, the bottom outer surface facing with the bottom surface 33a of the powder container 3 with a slight clearance, and the longitudinal inner wall surface 33 and the bottom outer surface. And a narrow suction slit 62.

The drive means is arranged such that the sweep housing 61 is located above the upper opening of the powder container 3 and is retracted from the upper opening of the upper container of the powder container 3. It is moved forward and backward to a position above that one end side (moving movement in the direction indicated by arrow A in FIG. 8), and the sweep housing 6 is moved from a position above the inside of that one end side of the upper opening of the powder container 3
1 from the inside of one end side of the powder storage tank 3 to the upper part thereof (movement movement in the direction indicated by the arrow B in FIG. 8), from the inside of one end side of the powder storage tank 3 to the other end side. It also has a function of horizontally moving the sweep housing 61 from the other end side to the one end side (movement movement in a direction indicated by an arrow C in FIG. 8). As a specific means for realizing this function, various known members can be applied and configured, and those skilled in the art can easily assume such a configuration. Therefore, detailed description thereof will be omitted.

The suction sweep means sweeps the external gas through the suction slit 62 in the sweep housing 61.
The suction pipe 63 has a structure capable of forcibly sucking into the inside thereof, and for example, a suction pump that communicates with the inside of the sweep housing 61, a suction pump that forcibly sucks external gas from the suction slit 62 through the suction pipe 63 (not shown). No.) etc. can be mentioned.

The powder suction / removal means 60 shown in FIG. 8 operates as follows.

That is, the sweep housing 61 is initially retracted to the outside of the powder container 3. When it becomes necessary to clean the inside of the powder storage tank 3, the sweep housing 61 is moved from the position retracted up to that point to one end side in the powder storage tank 3 by the drive means and arranged. Then, the suction pump is driven to forcibly suck and exhaust the inside of the sweep housing 61 through the suction pipe 63. As a result, the outside air is sucked into the sweep housing 61 at high speed by the suction slit 62. The driving means is further driven to horizontally move the sweep housing 61 in the powder container 3. When the sweep casing 61 is horizontally moved in a state where the airflow is flowing from the suction slit 62 into the sweep casing 61 at a high speed, the residual powder adhered to the inner peripheral side surface and the bottom surface of the powder container 3 is swept at high speed. At the same time, it is sucked into the sweep casing 61. When the sweep housing 61 is reciprocally moved in the longitudinal direction in the powder container 3 while sucking the outside air from the suction slit 62 at high speed, the residual powder adhered to the inner peripheral side surface and the bottom surface of the powder container 3 is removed. To be done.

In the present invention, the powder suction / removal means and the scraping means may be integrated. For example, as an example in which the powder suction / removal means and the scraping means are integrated into a device, as shown in FIG.
And a suction / sweep unit having a drive unit (not shown) for driving the sweep housing 71 and a suction / exhaust unit (the whole thereof is not shown).

In the case of this construction, the sweep casing 71 has side faces facing each other with a slight gap on the inner wall surface 33 in the longitudinal direction of the powder container 3 when the sweep casing 71 is housed in the powder container 3. When the sweep housing 71 is moved horizontally, the powder container 3
When the sweep housing 71 is moved horizontally in the powder storage tank 3, the powder in the powder storage tank 3 is pushed forward and the bottom outer surface in contact with the bottom surface of the powder storage tank 3 is pushed to the bottom surface of the powder storage tank 3. A front plate 72 capable of dropping the powder into the open powder collecting hopper and scraping off the powder filled in the powder collecting hopper, the longitudinal inner wall surface 33, and the bottom outer surface are provided. ,
It has a narrow suction slit 73. In the sweep housing 71, the front plate has a function as the scraping means in the present invention. Therefore, unlike the powder sorting apparatus shown in FIG. 1, for example, the powder sorting apparatus adopting the powder suction / removal means shown in FIG.
The scraping means as shown in FIG. 2 is unnecessary, and the simplification of the device is achieved.

The driving means is not particularly limited in its constitution as long as it has a function of moving the sweep casing 71 horizontally in the longitudinal direction in the powder container 3, and a concrete constitution for achieving the above-mentioned function. Can be easily grasped by those skilled in the art.

The suction / exhaust means may have the same structure as the suction / exhaust means shown in FIG.

The operation of the powder suction / removal device shown in FIG. 9 is apparent from the above description.

[0080]

According to the invention, the powder can be divided into a plurality of kinds of volumes and automatically sorted, and therefore the operator's hand can be kept clean and the apparatus configuration can be simplified. Automatic powder sorting device capable of sorting powder into multiple types of capacity and automatically sorting, and can also automatically clean the inside of the powder storage tank, thus soiling the operator's hands Without being limited to an automated powder sorting device that can simplify the device configuration, and can automatically sort powder by dividing it into a plurality of types of capacity, and further An automated powder dispenser capable of automatically cleaning the powder discharge pipe that discharges the collected powder, thus keeping the operator's hands clean and simplifying the device configuration. , And a device that can automatically clean the inside of the powder storage tank. It is possible to provide a powder container cleaning device having a simple structure and a powder discharge pipe cleaning device having a simple device structure capable of automatically cleaning a powder discharge pipe body for discharging powder. .

[Brief description of drawings]

FIG. 1 is an explanatory view showing a simplified front view of a powder sorting apparatus according to an embodiment of the present invention.

FIG. 2 is a view showing a powder collecting device according to an embodiment of the present invention, in which a scraping plate supported by a support is housed at one end side of the powder housing tank, A scraping device configured to move a scraping plate provided on a support body suspended and supported by a support plate in a longitudinal direction of a powder storage tank by moving the support plate on a horizontal rail arranged in the longitudinal direction. It is a schematic plan view shown.

FIG. 3 shows a powder collecting apparatus according to an embodiment of the present invention, in which a scraping plate supported by a support is housed at one end side of the powder housing tank, A scraping device configured to move a scraping plate provided on a support body suspended and supported by a support plate in a longitudinal direction of a powder storage tank by moving the support plate on a horizontal rail arranged in the longitudinal direction. It is a schematic side view shown.

FIG. 4 shows a powder discharging pipe cleaning device according to an embodiment of the present invention, and the powder discharging pipe cleaning device according to an embodiment of the present invention. It is a partially notched side view which shows the example applied to the taking device.

FIG. 5 is a schematic side view showing a cleaning device for cleaning the inside of a powder container in the powder sorting apparatus according to the embodiment of the present invention.

FIG. 6 is a schematic plan view showing a suction housing in the powder container cleaning device in the powder sorting apparatus according to the embodiment of the present invention.

FIG. 7 is a partially cutaway perspective view showing an exterior pipe used in the powder discharge pipe cleaning device in the powder fractionation device according to the embodiment of the present invention.

FIG. 8 is a partially cutaway perspective view showing a powder suction / removal device in a powder sorting device according to another embodiment of the present invention.

FIG. 9 is a partially cutaway perspective view showing a powder suction / removal device in a powder sorting device according to another embodiment of the present invention.

[Explanation of symbols]

1 ... powder sorting device, 2 ... powder supply line, 3 ...
Powder container, 4 scraping device, 5 open / close device, 6 powder container cleaning device, 7 powder discharge pipe cleaning device, 9 sampling hopper 10,
... Cyclone, 11 ... Ball valve, 12 ... Injection pipe, 13 ... Scraped plate, 14 ... Support, 15
... Powder sampling hopper for residual monomer measurement, 16 ...
・ Opening part, 17 ... Powder collecting hopper for particle size distribution measurement, 18 ... Opening part, 19 ... Foreign material measuring powder collecting hopper, 20 ... Opening part, 21 ... Storage powder Body collection hopper, 22 ... Opening part, 23 ... Excess powder discharge pipe, 24 ... Opening part, 25 ... Support plate, 26 ...
・ Horizontal rail, 27 ... Lower opening, 28 ... Shutter plate, 29 ... Shutter plate drive device, 30 ...
-Suction housing, 31 ... Suction housing moving device, 32 ...
Exhaust device, 33 ... Longitudinal inner wall surface, 34 ... Longitudinal outer wall surface, 36 ... First hopper accommodating portion, 37 ...
..Second hopper storage section, 38 ... Third hopper storage section, 39 ... Fourth hopper storage section, 40 ...
Stopper, 41 ... Small housing, 42 ... Suction tube, 43
... Vertical rails, 44 ... Moving body, 45 ... Coupling support member, 46 ... Tube body, 47 ... Outer tube, 48 ...
..Exterior tube, 49 ... powder outlet, 50 ... opening, 51 ... suction pipe, 52 ... cylindrical tube, 5
3 ... bottom part, 54 ... rib, 55 ... sample container, 56 ... container mounting table, 57 ... powder receiving container,
58 ... Guide hopper, 60 ... Powder suction / removal means,
61 ... Suction housing, 62 ... Suction slit, 63 ...
..Suction pipe, 71 ... Sweep housing, 72 ... Front plate, 73 ... Suction slit

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Jun Tsutsumi 2-16-2 Noguchi-cho, Higashimurayama-shi, Tokyo Nikkiso Higashimurayama Manufacturing Co., Ltd. (72) Masaaki Suzuki 2-16-2 Noguchi-cho, Higashimurayama-shi, Tokyo Nikkiso Higashimurayama Manufacturing Co., Ltd. (72) Inventor Keisuke Kato 2-16-2 Noguchicho, Higashimurayama, Tokyo Nikkiso Co., Ltd. (72) Inventor Masanori Niiyama 2-16-2 Noguchicho, Higashimurayama, Tokyo Nikkiso Co., Ltd. Higashimurayama Plant (72) Inventor Yoshihisa Hirakuri 2-16-2 Noguchi Town, Higashimurayama City, Tokyo Nikkiso Higashimurayama Plant

Claims (7)

[Claims] 1. A powder storage tank having a plurality of powder collection hoppers of different volumes and powder discharge means for discharging excess powder on the bottom surface, and moving the bottom surface of the powder storage tank. The scraping means for removing excess powder in the powder contained in the powder collecting hopper from the powder discharging means, and the powder takeout opening provided at the bottom of each powder collecting hopper are opened and closed. A powder fractionation device comprising: an opening / closing means. 2. A powder containing tank having a plurality of powder collecting hoppers of different volumes and powder discharging means for discharging excess powder on the bottom surface, and moving the bottom surface of the powder housing tank. The scraping means for removing excess powder in the powder contained in the powder collecting hopper from the powder discharging means, and the powder takeout opening provided at the bottom of each powder collecting hopper are opened and closed. A powder fractionation device comprising: an opening / closing means and a powder suction / removal means for sucking and removing the powder adhering to the inner walls of the powder storage tank and the powder sampling hopper. 3. The powder suction / removal means includes a suction housing that is insertable into and removable from a space in the powder storage tank excluding the scraping means, and an exhaust device that exhausts the inside of the suction housing. The suction housing has an outer wall slightly separated from an inner wall in the powder storage tank and a bottom surface slightly separated from a bottom surface of the powder storage tank when inserted into the powder storage tank. A hopper that has a wall surface that is inserted into a powder sampling hopper provided on the bottom surface of the powder container and that is separated from the inner wall of the powder sampling hopper, and that has a suction port that opens corresponding to the powder outlet. The powder fractionation device according to claim 2, further comprising an inner containing portion. 4. The powder according to any one of claims 1 to 3, wherein the powder collecting hopper has a tubular body extending downward from a bottom portion of the powder collecting hopper and opening at a lower end thereof. Preparative device. 5. A mantle tube which is provided so as to surround the outer periphery of the pipe body, has an upper end portion closed, and has an opening portion at the lower end portion that surrounds and opens the powder outlet of the pipe body; Suction means for sucking gas in the tube, and an outer tube having a cylindrical tube portion having a diameter larger than the diameter of the outer tube and a bottom portion, the outer tube, the outer tube to the inside of the cylindrical tube portion. It is formed so that it can be inserted and removed, and the bottom of the outer tube is
When the outer tube is inserted into the cylindrical tube portion, the gap between the inner circumference of the cylindrical tube portion and the outer circumference of the outer tube and the gap between the inner circumference of the outer tube and the outer circumference of the tubular body are formed so as to be able to communicate with each other. The powder fractionation device according to claim 4, characterized in that 6. A suction housing having an outer shape having an outer surface forming a predetermined gap with respect to the inner surface of the powder container and having a suction port, and exhausting gas in the suction housing. A powder accommodating tank cleaning device, comprising: suction and exhaust means. 7. A lower end of an opening, which is provided so as to surround the outer periphery of a pipe for discharging powder from a powder outlet, has an upper end closed and surrounds and opens a lower end opening of the pipe. An outer tube, a suction means for sucking gas in the outer tube, an outer tube having a cylindrical tube portion having a diameter larger than the diameter of the outer tube and a bottom portion, and an opening / closing means for opening / closing the powder outlet. And the outer tube is formed so that the outer tube can be inserted into and removed from the cylindrical tube portion, and the bottom portion of the outer tube is inside the cylindrical tube section when the outer tube is inserted into the cylindrical tube section. A powder discharge pipe body cleaning device, characterized in that a gap between the circumference and the outer periphery of the outer pipe and a gap between the inner periphery of the outer pipe and the outer periphery of the pipe body are formed to communicate with each other.