JPH0624417A - Powder filling machine - Google Patents

Abstract

PURPOSE:To make the generating quantity of a powder which should be re- purified as small as possible without contaminating the peripheral environment by the powder for a powder filling machine which fills a powder in a bag by a specified quantity. CONSTITUTION:This powder filling machine fills a powder P which is discharged from a powder shoot outlet 11a in a bag Y which is provided under the powder shoot outlet by a specified quantity. An air/powder suction port 44 which draws air and the powder by a suction device 41 is provided between the power shoot outlet 11a and an air inlet 26, and also, an air/powder separating device 42 which separated a powder P1 from a powder mixed in air Q being drawn from the air/powder suction port 44 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder filling machine for filling fine powder powder such as milk powder into a bag.

[0002]

2. Description of the Related Art As a powder filling machine of this type, those shown in FIGS. 4 and 5 have been known. This Figure 4
In the conventional powder filling machine shown in FIG. 5, the powder P supplied from the powder supply device (screw feeder) 1 is mounted on the outer periphery of the guide cylinder 3 through the powder chute 11 by opening / closing the damper 12. The bag Y can be filled with a fixed amount.

In this type of powder filling machine, the guide tube 3 is free from the powder chute 11 because the measuring device 6 is provided on the side of the guide tube 3 on which the bag Y is mounted. A small space M (M = about 5 mm) is formed between the powder chute outlet 11a and the upper end of the guide cylinder 3. Further, when the powder P is supplied from the powder chute outlet 11a into the bag Y through the guide cylinder 3, the powder P is a fine powder and has a small specific gravity, and because of a drop impact at the bottom of the bag. Moreover, a part of the powder P comes to float like a fog in the bag (in the guide cylinder 3). Air Q mixed with such smoky powder
A relatively large amount of powder component is mixed therein. Further, when the powder P is supplied into the bag from the powder chute outlet 11a, the air in the bag Y (in the guide cylinder 3) is replaced with the powder P, but at that time, the powder floats. The powder-entrained air Q is removed to the outside through the gap M between the powder chute outlet 11a and the upper end of the guide cylinder 3. If the powder-containing air Q is discharged to the outside as it is in this way, the raw material (powder) is lost, the surrounding work environment is polluted with the powder, and the powder is deposited on the weighing device or the like. Then, the weighing device 6 becomes 0
This causes problems such as a point abnormality, and the powder adheres to the bag attachment detection sensor (photoelectric tube) to make it impossible to detect the presence or absence of the bag.

By the way, in the conventional powder filling machine shown in FIGS. 4 and 5, when the air and the powder P are replaced in the bag Y, the powder-containing air Q is prevented from being discharged to the outside as it is. A powder scattering prevention device 2 is provided. This powder scattering prevention device 2 is provided with an annular intake port 26 that is sucked by the suction device 21 on the outer periphery of the outlet 11a of the powder chute 11, and the air / powder is provided between the intake port 26 and the suction device 21. The separator 22 is interposed.

In this conventional powder filling machine, the powder chute 11 is operated while the powder scattering prevention device 2 is operated.
When the powder P is supplied into the bag Y from the outlet 11a of the
The powder-containing air Q, which is replaced with the powder P inside (inside the guide cylinder 3), is sucked into the intake port 26 through the gap M between the powder chute outlet 11a and the upper end of the guide cylinder 3. Then, the powder P is introduced into the air / powder separator 22 through the vacant chamber 28 and the duct 29, and the powder P can be separated there. As the suction device 21 of the powder scattering prevention device 2, a device having a considerably large capacity is adopted in order to prevent the powder mixed air Q from flowing out of the gap M to the outside. Then, the amount of powder in the powder-containing air Q sucked from the intake port 26 is 3% of the amount of powder filled in the bag Y.
Reach a degree. Further, the suction device 21 of the powder scattering prevention device 2
Is operated, not only the air mixed with powder (arrow A or B) in the guide cylinder 3 or from the powder chute outlet 11a but also the outside air is sucked from the intake port 26 as shown by arrow C. Become. In this way, the dust-containing air Q ₂ sucked into the air / powder separator 22 together with the outside air C contains dust, miscellaneous bacteria, and the like in the outside air. The powder (impurity-containing powder) P ₂ separated from the powder-containing air Q ₂ mixed with outside air cannot be used as a product unless it is re-refined. Then, if a predetermined amount of the powder P ₂ containing impurities is accumulated in the air / powder separator 22,
The damper 23 is operated to fill the powder P ₂ from the chute 25 into the bag Y ₁ , which is then transferred to the refining process site for reprocessing.

[0006]

However, the above-described conventional powder filling machine has the following problems. That is,
During the powder filling operation, the powder P filled in the bag Y and the powder-containing air Q containing a large amount of powder components are replaced in the bag Y (in the guide cylinder 3). A large amount of powder-containing air Q having a high body content content is sucked and discharged to the air / powder separator 22 side, so that the loss amount of the powder increases (about 3 times the amount of the powder filled in the bag Y). % Is discharged). Further, the dust-containing air Q ₂ discharged to the air / powder separator 22 side contains dust, bacteria, etc. in the outside air, and the powder separated from the air in the air / powder separator 22. Body P ₂ needs to be repurified,
When a large amount of powder components are discharged to the gas / powder separator 22 side as described above, the amount of powder P ₂ to be re-refined also increases, and the work for re-refining increases and the operation cost thereof increases. There was the problem of being expensive.

In view of the problems of the above-mentioned conventional powder filling machine, the present invention is a powder filling which can minimize the amount of powder to be re-refined without polluting the surrounding environment with the powder. The purpose is to provide a machine.

[0008]

According to the invention of claim 1 of the present application, an intake port for intake by a suction device is provided on the outer periphery of the outlet of a powder chute provided on the downstream side of the powder supply device,
In the powder filling machine, the powder is discharged from the powder chute outlet while inhaling from the intake port, and the powder is filled in a bag provided below the powder chute outlet. A gas / powder suction port that is sucked by a suction device is provided between the body chute outlet and the suction port, and
It is characterized in that it is provided with an air / powder separation device for separating the powder from the air mixed with the powder sucked from the powder suction port.

Further, according to the invention of claim 2 of the present application, an annular intake port which is sucked by the suction device is provided on the outer periphery of the outlet of the powder chute provided on the downstream side of the powder supply device, and from the intake port. In a powder filling machine that discharges powder from the powder chute outlet while inhaling and fills the powder in a bag provided below the powder chute outlet, An annular gas / powder suction port that is sucked by a suction device is provided between the suction port and the powder mixture that is sucked from the gas / powder suction port between the gas / powder suction port and the suction device. A gas / powder separator for separating powder from the air is interposed, and the powder separated from the air mixed with powder in the gas / powder separator is fed into the powder chute. It is characterized by having a powder returning device for returning.

Further, according to the invention of claim 3 of the present application, in the powder filling machine according to claim 1 or claim 2, the powder chute is provided at the lower end portion of the cylindrical wall constituting the powder chute outlet with the outside of the powder chute outlet. It is characterized by providing an annular spacer that widens the distance between the end and the inner end of the air / powder suction port.

[0011]

In the invention of claim 1 of the present application, an air / powder suction port located inside and an intake port located outside thereof are provided on the outer periphery of the outlet of the powder chute. Qi
The powder is supplied from the powder suction port and the suction port by the suction device while the powder is supplied by the powder supply device through the powder chute into the bag provided below the powder chute. Then, when the powder is supplied into the bag, the powder and the air are replaced in the bag, but a part of the powder supplied into the bag floats to form powder mixed air. Thus, the air mixed with the powder is replaced with the powder filled in the bag.

By the way, the air / powder suction port is located inside the air intake port to suck only the air mixed with the powder in the bag, while the air intake port is located outside the air / powder suction port to mainly suck outside air. become. Therefore, since the outside air is not mixed in from the air / powder suction port on the inside, only the powder-containing air that remains clean (no dust is mixed) is sucked in, while almost all the powder components are discharged from the outside suction port. Only the outside air that is not mixed is sucked. Further, when the outside air is sucked from the outside air inlet, even if the air mixed with the powder generated in the bag goes out through the air / powder suction port to the outside, the air mixed with the powder will be sucked by the outside air. As it is sucked from the intake port, the air mixed with the powder will not be scattered to the outside. Also, the inside
The powder-mixed air having a large powder content sucked from the powder suction port is separated from the air by the air / powder separation device. The powder separated in this air / powder separator is
It is in a clean state (no dust is mixed in),
There is no problem in packaging the product as it is.

On the other hand, the powder component is slightly mixed in the intake air sucked from the outside intake port (for example, about 0.4% or less of the powder amount filled in the bag). The entrained air is introduced into another air / powder separator where the powder is separated. It should be noted that the powder separated here contains dust in the outside air and needs to be re-refined before it can be used as a product, but the amount of powder collected here is smaller than in the past. The number of operations for re-refining can be significantly reduced.

In the second aspect of the invention, as in the case of the first aspect, only the powder-containing air which is still clean is sucked from the air / powder suction port. It is directed into a separator where the powder is separated from the air.
Then, the powder separated in the air / powder separator is automatically returned to the powder supplied into the powder chute by the powder returning device, without any special transfer work. In the next step, the product is filled in the bag.

According to the second aspect of the invention, since the annular spacer is provided between the outer end of the powder chute outlet and the inner end of the air / powder suction port, the width of the spacer is outside the powder chute outlet. The distance between the end and the inner end of the air / powder suction port becomes wide, and it becomes difficult for the high-density powder immediately after being discharged from the powder chute outlet to be directly sucked to the air / powder suction port side. Therefore, the total amount of powder components sucked toward the air / powder suction port side is reduced.

[0016]

According to the invention of claim 1, at the time of powder filling operation, the inside air / powder suction port and the outside suction port that surround the outside of the powder chute outlet are sucked by the suction device. Therefore, when powder is supplied from the powder chute outlet into the bag, almost all the air mixed with the powder that is displaced in the bag is sucked from the air / powder suction port inside. As a result, the air mixed with the powder is hardly sucked into the intake port side for sucking the outside air. Therefore, the amount of powder containing impurities that should be re-refined later can be significantly reduced, and the number of operations for re-refining the powder can be reduced.
There is an effect that the work cost for the re-purification can be reduced.

According to the second aspect of the invention, the powder in the powder-containing air which is still clean and is sucked from the air / powder suction port is
Although it is separated from the air in the air / powder separator, the separated clean powder is automatically returned to the powder chute side by the powder return device, so the powder transfer work There is an effect that is unnecessary.

Further, according to the invention of claim 3, the annular spacer provided between the outer end of the powder chute outlet and the inner end of the air / powder suction port allows the high density immediately after being discharged from the powder chute outlet. Powder becomes difficult to be directly sucked to the air / powder suction port side, the total amount of powder components sucked to the gas / powder suction port side is reduced, and the time for filling the powder into the bag can be shortened. There is an effect.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 3, and the powder filling machine of this embodiment has a powder hopper 1
Powder supply device 1 for supplying the powder P housed in 0 to the powder chute 11 side, and the outlet 11 of the powder chute 11.
a guide tube 3 continuously provided below a under a distance, a clamp device 5 for holding the bag Y on the outer peripheral surface of the guide tube 3, and a weighing device 6 connected to the clamp device 5.
From the powder-mixed air (powder-mixed air) Q that replaces the powder P in the bag Y (in the guide cylinder 3) during powder supply, the powder P ₁
And a powder-scattering prevention device 2 for preventing the powder-mixed air Q from scattering to the outside.

The powder feeder 1 employs a screw feeder and is constructed by horizontally disposing a screw rod 14 which is rotated by a motor 14 in a guide cylinder 13. Then, by rotating the screw rod 15 by the motor 14, the powder P in the powder hopper 10 is
Can be sequentially supplied to the powder chute 11 side.

A damper 12 is provided in the powder chute 11. This damper 12 is a cylinder 12A.
It can be opened and closed by.

Two cylindrical walls 47 and 27 are formed on the outer periphery of the cylindrical wall 17 which constitutes the outlet 11a of the powder chute 11 at intervals in the inner and outer directions. That is, the outlet portion of the powder chute is concentrically formed with a total of three-fold cylindrical wall. In the following description, for convenience, the powder chute outlet 1 will be described.
The tubular wall 17 that constitutes 1a is referred to as an inner tubular wall, the outermost tubular wall 27 is referred to as an outer tubular wall, and the tubular wall 47 between the inner tubular wall 17 and the outer tubular wall 27 is referred to as an intermediate tubular wall. . In this embodiment, the inner cylindrical wall 17 has an inner diameter of 126 mm and the intermediate cylindrical wall 47 is
Has an inner diameter of 160 mm, and the outer cylinder wall 27 has an inner diameter of 205 mm. Further, the lower end heights of these cylindrical walls 17, 27, 47 are made equal to each other in this embodiment.

Between the outer surface of the inner cylindrical wall 17 and the inner surface of the intermediate cylindrical wall 47, a ring-shaped chamber 48 having a closed upper part is formed, while the outer surface of the intermediate cylindrical wall 47 and the outer cylindrical wall 27 are closed. Between the inner surface and the inner surface, an annular space 28 whose upper part is also sealed is formed. Further, the lower end portion of the empty chamber 48 between the inner cylindrical wall 17 and the intermediate cylindrical wall 47 serves as an annular air / powder suction port 44 serving as an inlet of the powder recovery device 4, while the intermediate cylindrical wall 47 and the outer side are provided. A lower end portion of the empty chamber 28 between the cylindrical wall 27 and the cylindrical wall 27 serves as an annular intake port 26 that serves as an inlet of the powder scattering prevention device 2.

The powder collecting device 4 includes the air / powder suction port 44.
Device 41 for making a negative pressure in the vacant chamber 48 provided with
And a gas / powder separator (corresponding to the gas / powder separation device in claim 1) 42 for separating the powder P ₁ from the powder-containing air Q sucked between the vacant chamber 48 and the suction device 41. Have

As the air / powder separator 42 of the powder recovery apparatus 4, a vertical closed container having an open bottom is used. The airtight container (air / powder separator 42) is attached to the upper part of the guide cylinder 13 immediately above the powder chute 11 so that the lower opening of the airtight container is opened in the guide cylinder 13. There is.

At the lower opening of the air / powder separator 42, a damper 46 for closing the lower opening in a hermetically closed state is provided. The damper 46 is opened and closed by a cylinder 46A.

The inside of the chamber 48 of the powder collecting apparatus 4 and the inside of the air / powder separator 42 are connected by a duct 49A, and the inside of the air / powder separator 42 and the suction device 41 are connected by a duct 49B. Has been done.

In the powder collecting device 4, when the suction device 41 is operated while the damper 46 is closed during operation, the powder generated in the bag Y (the guide cylinder 3) from the air / powder suction port 44. The body-entrained air Q is sucked into the air / powder separator 42, and the powder component in the sucked powder-entrained air Q is separated in the air / powder separator 42 so that it can be deposited on the bottom of the container. Has become.

The damper 46 for opening / closing the lower opening of the air / powder separator 42 and the cylinder 46A for operating the same are the powder returning device 45 in the claims, and the damper 46 is opened. Air / powder separator 42
The powder P ₁ in the inside can be returned directly into the guide cylinder 13.

In this embodiment, the gas / powder separator 42 of the powder recovery device 4 is provided with the guide tube 13 immediately above the powder chute 11.
Although it is mounted on the upper portion, the mounting location of the gas / powder separator 42 is not particularly limited, and the powder P ₁ in the gas / powder separator 42 is supplied into the powder chute 11. The structure of the powder returning device 45 for returning the powder P, the returning position of the powder P ₁ by the powder returning device 45, and the like can be changed within the scope of the claims.

An annular spacer 18 is attached to the inner surface of the inner cylindrical wall 17 at the lower end of the inner cylindrical wall 17 which constitutes the outlet 11a of the powder chute 11. The spacer 18 is for widening the distance N between the outer end of the powder chute outlet 11a and the inner end of the air / powder suction port 44. In the illustrated example, the interval N is about 15 to 20 mm. Further, the spacer 18 has an inclined surface whose inner peripheral surface is gradually reduced in diameter downward, so that the spacer 18 does not obstruct the powder P passing through the powder chute 11. At the same time, it acts to collect the powder P discharged downward from the powder chute outlet 11a toward the center of the powder chute outlet. Therefore, if the inner peripheral surface of the spacer 18 is tapered downward as in the illustrated example, the powder chute outlet 11a is formed.
It becomes difficult for the high-density powder discharged from the air to be sucked directly to the air / powder suction port 44 side. Note that, in other embodiments, the spacer 18 is not particularly limited in shape as long as it can secure the interval N, and the spacer 18 may be formed on the outer surface side of the inner cylindrical wall 17. Good.

The powder recovery device 4 can be relatively easily assembled and installed in the conventional powder filling machine shown in FIGS.

The powder scattering prevention device 2 has the same structure as the conventional structure shown in FIGS. That is, the suction device 21 that makes the inside of the empty chamber 28 provided with the intake port 26 a negative pressure
And a gas / powder separator 22 which is located between the vacant chamber 28 and the suction device 21 and separates the powder component in the powder-containing air Q ₂ to be sucked. When the suction device 21 is actuated, the powder scattering prevention device 2 mainly sucks the outside air from the intake port 26 (also slightly sucks the powder mixed air Q generated in the guide cylinder 3) to separate the air and the powder. In the container 22, the powder component in the sucked powder-containing air Q ₂ can be separated and deposited on the bottom of the container. A damper 23 is provided at the lower opening of the air / powder separator 22.
Further, a chute 25 is continuously provided below the air / powder separator 22, and a predetermined amount of the powder P ₂ is placed in the air / powder separator 22.
When the powder is accumulated, the powder P ₂ in the gas / powder separator 22 can be accommodated in the bag Y ₁ by opening the damper 23 with the bag Y ₁ attached to the outside of the chute 25. You can do it.

Immediately below the outlet 11a of the powder chute 11, the guide cylinder 3 is provided with a small space M between the upper end of the guide cylinder 3 and the powder chute outlet 11a (lower end of the inner cylinder wall 17). It is installed in a closed state. The small interval M is
It is preferable to make it as small as possible (M = 1 to 5 mm). The guide cylinder 3 has a diameter approximately equal to that of the intermediate cylinder wall 47. Therefore, the upper end of the guide cylinder 3 is located close to the lower end of the intermediate cylinder wall 47 at a position vertically corresponding to the lower end. Thus, when the upper end of the guide cylinder 3 is brought close to the lower end of the intermediate cylinder wall 47 with a small interval M (about 1 to 5 mm), the powder-containing air Q generated in the guide cylinder 3 passes through the interval M and is sucked. It becomes difficult to be sucked toward the mouth 26 side.

A clamp device 5 for holding the bag is provided outside the guide tube 3. The clamp device 5 has a pair of left and right tubes 51, 51 that expand and contract in the diametrical direction. By inflating the tubes 51, 51, the vicinity of the opening of the bag Y is pressed against the outer peripheral surface of the guide cylinder 3. It can be supported.

The clamp device 5 is provided with a weighing device 6 for weighing the powder P filled in the bag Y.

Next, how to use and the operation of the powder filling machine of the illustrated embodiment will be explained. A bag Y is attached to the outer peripheral portion of the guide cylinder 3, and the air / powder separator 42 on the powder collecting device 4 side is attached. The damper 46 is closed and the damper 1 in the powder chute 11 is closed.
2 is opened, the damper 23 of the air / powder separator 22 on the side of the powder scattering prevention device 2 is closed, and the powder supply device 1 is operated while the suction devices 21 and 41 are operated.
The powder P therein passes through the powder chute 11 in sequence and is accommodated in the bag Y. At that time, the powder P contained in the bag Y is replaced with air, and a part of the powder P comes to float in the air inside the bag (in the guide cylinder 3).

On the other hand, since the suction devices 21 and 41 are operating, they are generated in the bag Y (in the guide tube 3) from the air / powder suction port 44 of the powder recovery device 4 as shown by an arrow A. The powder-containing air Q is sucked, and the outside air is sucked from the intake port 26 of the powder scattering prevention device 2 as shown by an arrow C. Therefore, the powder-containing air Q replaced with the powder P in the bag Y is sucked into the vacant chamber 48 from the air / powder suction port 44,
Further, as indicated by reference numeral Q ₁ ,
The powder component is sucked into the powder separator 42, and the powder component is separated there. The powder P ₁ thus separated in the air / powder separator 42 is sequentially deposited on the bottom of the air / powder separator 42. On the other hand, since the outside air is continuously sucked from the intake port 26, the powder-containing air Q generated in the bag does not leak to the outside and does not pollute the surrounding environment.
Further, from the intake port 26, the powder-containing air Q mixed with the outside air and generated in the bag is sucked in a small amount, but the powder-containing air Q ₂ sucked from the intake port 26 is It is sucked into the air / powder separator 22 on the body scattering prevention device 2 side, where the powder component is separated and deposited.

Further, since the annular spacer 18 is provided at the lower end of the inner cylindrical wall 17, the space N between the powder chute outlet 11a and the gas / powder suction port 44 is provided by the spacer 18.
Is widened, and the high-density powder P immediately after being discharged from the powder chute outlet 11a remains the gas / powder suction port 44.
It becomes difficult to be sucked to the side. Therefore, even if the powder collecting device 4 is provided, the filling speed into the bag Y does not become so slow.

When a predetermined amount of powder P is filled in the bag Y,
The damper 12 in the powder chute 11 is closed by a signal from the weighing device 6, and the operation of each suction device 21, 41 is stopped,
The clamp device 5 is released from the bag support, the powder-containing bag is removed from the guide cylinder 3, the next bag Y is set on the outer periphery of the guide cylinder 3 by a bag supply device (not shown), and then the damper 12 is opened. When the suction devices 21 and 41 are operated, the next powder filling operation is performed.

The powder P ₁ deposited in the air / powder separator 42 of the powder recovery device 4 remains clean (no impurities such as dust are mixed) because it is not in contact with the outside air, and is kept as it is. There is no problem even if it is used as a product. And
The powder P ₁ accumulated in the gas / powder separator 42 stops the suction device 41 and causes the damper 12 in the powder chute 11 to stop.
In the closed state, the powder returning device 45 (damper 46 and cylinder 46A) is operated to drop the powder P ₁ in the gas / powder separator 42 onto the damper 12 in the powder chute 11. Next, it is mixed in the powder supplied by the powder supply device 1 and filled in the next bag. In this way, the powder P ₁ recovered by the powder recovery device 4 is packed in the bag Y in the next powder filling step.
If so as to fill the inside, the powder amount to be loss can be significantly reduced, yet by drop over the damper 12 of the powder P ₁ directly in the powder chute, correspondingly, flour The next powder supply amount by the body supply device 1 can be small, and the powder filling time into the bag can be shortened. The operation of the powder returning device 45 may be performed in conjunction with the powder filling operation on the powder chute 11 side.

On the other hand, the powder mixed air Q ₂ (a small amount of powder is mixed) sucked into the air / powder separator 22 on the side of the powder / scatter prevention device 2 is in the air / powder separator 22. At, the powder component is separated and deposited in the gas / powder separator 22 as indicated by the symbol P ₂ . Then, when a predetermined amount of the powder P ₂ is accumulated in the air / powder separator 22, the damper 23 is opened and accommodated in the bag Y ₁ and transferred to the repurification step. The powder component sucked to the powder scattering prevention device 2 side is about 0.4% or less of the powder amount packed as a product, which greatly reduces the powder amount that needs re-refining. be able to.

[Brief description of drawings]

FIG. 1 is an overall schematic view of a powder filling machine according to an embodiment of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an overall schematic view of a conventional powder filling machine.

5 is a partially enlarged view of FIG.

[Explanation of symbols]

1 is a powder supply device, 2 is a powder scattering prevention device, 3 is a guide tube, 4 is a powder recovery device, 5 is a clamp device, 6 is a weighing device, 11 is a powder chute, 11a is a powder chute outlet,
12 is a damper, 17 is a cylinder wall (inner cylinder wall), 18 is a spacer, 21 is a suction device, 22 is a gas / powder separator, 26 is an intake port, 41 is a suction device, 42 is a gas / powder separator, 44 Is a gas / powder suction port, 45 is a powder returning device, P is powder, and Q is powder mixed air.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuaki Ochi 2129 Takamatsu-cho, Takamatsu-shi, Kagawa (72) Inventor Isaka Nakayama 3-13-26 Minami-Hatsutomi, Kamagaya-shi, Chiba (72) Inventor Ryoji Machida Kanagawa 1067 Suwa 1067, Suwa, Takatsu-ku, Kawasaki, Japan (72) Inventor Hiroaki Kobayashi 249 Bekkai Tokiwacho, Betsukai-cho, Notsuke-gun, Hokkaido Snowman's house (72) Inventor Kenji Homma, Bekkai-cho, Bekkai-cho, Notsuke-gun, Hokkaido 249

Claims (3)

[Claims] 1. A powder chute provided on the downstream side of a powder supply device is provided with an intake port on the outer periphery of the exit, and an intake port for intake by a suction device is provided. And a powder filling machine for filling the powder into a bag provided below the powder chute outlet, wherein a suction device is provided between the powder chute outlet and the intake port. Powder filling characterized in that it is provided with a gas / powder suction port that is sucked by the air / powder, and a gas / powder separation device that separates powder from the powder-containing air sucked from the gas / powder suction port Machine. 2. An annular intake port, which is sucked by a suction device, is provided on the outer periphery of the outlet of a powder chute provided on the downstream side of the powder supply device, and from the powder chute outlet while inhaling from the intake port. A powder filling machine, which discharges powder and fills the powder in a bag provided below the powder chute outlet, between the powder chute outlet and the intake port. An annular air / powder suction port for sucking by the suction device is provided, and powder is sucked from the powder-containing air sucked from the air / powder suction port between the air / powder suction port and the suction device. A powder returning device for interposing a separating air / powder separator and returning the powder separated from the air mixed with powder in the air / powder separator into the powder supplied into the powder chute. A powder filling machine characterized by being equipped. 3. The powdery chute according to claim 1, wherein a lower end portion of a cylindrical wall forming an outlet of the powder chute is provided between an outer end of the powder chute outlet and an inner end of the air / powder suction port. A powder filling machine characterized in that an annular spacer for widening the space is provided.