JP2702348B2 - Powder filling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder filling apparatus capable of filling powder such as toner used in an image forming apparatus into a predetermined container at high speed and high density.

[0002]

2. Description of the Related Art Toner used in an image forming apparatus such as an electrophotographic copying machine is filled in a container such as a bottle or a cartridge having a cylindrical shape or a rectangular tube shape, and is transported or stored. Normally, such a container is filled with the toner by positioning the container below the toner supply mechanism and allowing the toner in the toner supply mechanism to fall naturally into the container.

In such a method, the toner does not fall into the container at a high speed due to the air present in the container, and the toner dropped into the container is mixed with the air in the container. Are not filled at high density. For this reason, the predetermined amount of toner cannot be filled into the container by one-time natural fall.For example, about half of the total amount of toner to be filled into the container is once filled by natural fall, A method is employed in which the remaining toner is filled after a lapse of a predetermined time for the toner to settle.
In such a method, there is a problem that the toner cannot be efficiently filled in the container, and the working efficiency is very poor.

[0004] In contrast to such a method, for example, Japanese Patent Application Laid-Open No. 1-124503 discloses a method in which the inside of a container filled with powder is depressurized and the pressure generated between the inside of the container and the powder supply device is reduced. An apparatus has been disclosed that utilizes a difference to allow a high-density powder to be filled into a container at one time from a powder feeder.
In this powder filling apparatus, a nozzle portion is provided at a lower end portion of a hopper in which toner is stored in a state where the inside and the outside of a container installed in a decompression case are simultaneously depressurized, and a lower end of the nozzle portion is provided. The opening is opened and closed by raising and lowering a conical valve body whose diameter is gradually reduced toward the upper side. The lower end of the nozzle portion is located in a decompression case in which a container filled with the toner is disposed and the pressure is reduced. When filling the container with the toner, the inside and outside of the container placed in the decompression case are simultaneously depressurized, and then the toner inlet of the container is fitted to the lower end of the nozzle portion. Then, the lower end opening of the nozzle portion is opened by moving the valve body downward. Thereby, the toner stored in the hopper flows down into the container at a high speed via the nozzle portion, and the container is filled with the toner. At this time, since the inside of the decompression case is simultaneously returned to the atmospheric pressure, the container is not damaged by the toner filled at a high speed.

[0005]

In such a powder filling apparatus, since the velocity of the toner flowing down into the container is high and the pressure inside the container is reduced, the toner flowing down into the container is compressed. May be over-executed. In particular, immediately after the start of filling in which the difference between the pressure in the hopper and the internal pressure of the container is large, the toner flowing down into the container violently collides with the bottom surface of the container, so that a large compressive force acts on the toner.
As a result, depending on the particle size of the toner, the powder may be hardened in a block shape at the bottom of the container. If the toner hardens in the container, the toner may not be smoothly supplied from the container into the image forming apparatus when the container is used by being mounted on the image forming apparatus.

Further, when the toner in the hopper flows down into the container at a high speed, the toner flowing down in the hopper receives a strong compressive force from the inner peripheral surface of the hopper lower in diameter.
Therefore, the air mixed into the toner may be strongly compressed as it approaches the lower part of the hopper, and may be blown up at a stretch before flowing out of the hopper. As a result, the powder in the hopper is blown up, and a part of the powder is scattered outside the hopper. As described above, since a part of the toner in the hopper scatters outside the hopper, the container may not be filled with a predetermined amount of toner.

Further, since the toner flows down into the container at a high speed in a state where the pressure in the container is reduced, a large amount of toner may be scattered in the container. The toner scattered in the container adheres to the outer peripheral surface of the nozzle portion where the toner input port of the container is fitted, or when the space between the nozzle portion and the toner input port of the container is not securely sealed, There is also a risk of scattering outside the container. The toner adhering to the outer peripheral surface of the nozzle
Next, there is a possibility that the container and the peripheral portion may be stained by being scraped off by the toner inlet of the container fitted to the nozzle portion. The toner scattered outside the container similarly stains the container and its peripheral portion. In order to remove the toner from the container and the surrounding area, the filling operation of the toner must be temporarily stopped, and the filling operation efficiency is significantly reduced.

The present invention has been made to solve such a problem, and an object of the present invention is to fill powder at a high speed and at a high density, and the filled powder is solidified in a container. It is an object of the present invention to provide a powder filling apparatus capable of reliably preventing the above. It is another object of the present invention to provide a powder filling apparatus capable of reliably preventing powder from scattering out of a container and suppressing adhesion of powder to a nozzle or the like.

[0009]

SUMMARY OF THE INVENTION A powder filling apparatus according to the present invention is characterized in that the inside and the outside of a container to be filled with powder are decompressed to an equilibrium state, and the inside of the container is inserted through a powder inlet of the container. A device for filling powder into the container by raising the pressure of the outside of the container at the same time as allowing the powder to flow down, and a hopper for storing a predetermined amount of powder flowing down into the container,
Connected to the lower end of the hopper, and
A nozzle part whose inlet is fitted to the lower end part and causes the powder in the hopper to flow downward is arranged so as to be able to move up and down with respect to the nozzle part. A valve body that fits and closes the opening, and opens the lower end opening of the nozzle part by descending, and the valve body is attached to the lower end part, and the axial center part of the hopper and the nozzle part is A valve body drive shaft that is slidably inserted in the up and down direction , wherein the valve body is provided with the nozzle portion.
The powder flowing down from the upper side so that it hits the outer peripheral surface
As the diameter of the nozzle portion decreases,
Of the upper part where the packing pressed into contact with the lower end opening of the
It has a buffer part, and the buffer part of the fitted packing is
A constant outer diameter that is fitted into the nozzle portion adjacent to above
It is characterized in that a part is provided , whereby the object is achieved.

In the powder filling apparatus of the present invention, the powder flows down into the container through a powder inlet of the container from a state in which the pressure inside and outside the container filled with the powder is equilibrated. At the same time, a device for filling powder into the container by increasing the pressure of the outside of the container, and connected to a hopper for storing a predetermined amount of powder flowing down into the container, and a lower end of the hopper A nozzle portion in which the powder input port of the container is fitted to a lower end portion and the powder in the hopper flows down, and the nozzle portion is disposed so as to be able to move up and down with respect to the nozzle portion, so as to ascend. a valve body for opening the lower end opening of the nozzle portion by closing the opening and fitted into the lower end opening of the nozzle portion, descends by, the nozzle portion
A packing fitted to the valve body so as to be pressed, and a valve having the valve body attached to a lower end portion, and the hopper and the axial portion of the nozzle portion being slidably inserted in a vertical direction. A body drive shaft, and the valve body is shaped like a truncated cone whose diameter gradually decreases as it goes upward so that powder flowing down from the nozzle portion collides with the outer peripheral surface, and packing is provided at a lower portion.
The upper buffer part fitted with
The expanding shoulder is located on the lower side provided adjacent to the packing.
And a guide portion, whereby the object is achieved.

Further , the powder filling apparatus of the present invention provides a powder filling apparatus.
Whether the inside and outside of the container to be filled are depressurized to equilibrium
Flow the powder into the container through the powder inlet of the container.
At the same time as raising the pressure outside the container.
Is a device for filling powder into a container by
A hopper for storing a predetermined amount of powder to be produced, and the hopper
Is connected to the lower end of the container.
To make the powder in the hopper flow down
A nozzle portion, and the nozzle portion is arranged so as to be movable up and down.
And rises to the lower end opening of the nozzle.
The opening is closed by closing, and the descent is performed by descending.
A valve body that opens the lower end opening of the spill section and the nozzle section
A packing fitted to the valve body so as to be pressed against the valve body;
A body attached to the lower end, said hopper and
The nozzle axis is inserted so that it can slide vertically.
A valve body driving shaft, wherein the valve body is provided with the nozzle portion.
The powder flowing down from the upper side so that it hits the outer peripheral surface
As the diameter decreases, the upper buffer part has a truncated cone shape,
Lower the powder inlet of the container so that it is guided by the outer peripheral surface.
Frustoconical shape whose diameter decreases gradually toward the side
And a lower guide portion which can be separated from the portion.
The packing is sandwiched between the two,
Being a flat plate extending outward from the buffer
Which achieves the above objectives.
You.

Preferably, the guide portion of the valve body has an axial center.
The portion is provided with a protrusion projecting upward, and the buffer portion is provided.
A concave portion into which the protrusion is fitted is formed in the shaft center portion.
The packing is fitted in a state in which the packing is in close contact with the protrusion.
Configuration.

[0013] Preferably, the valve body has a cushioning portion.
Bites into the packing on the contact surface with the packing
Configuration with sharpened projections
You.

[0014]

[0015]

Further , the powder filling apparatus of the present invention provides a powder filling apparatus.
Whether the inside and outside of the container to be filled are depressurized to equilibrium
Flow the powder into the container through the powder inlet of the container.
At the same time as raising the pressure outside the container.
Is a device for filling powder into a container by
A hopper for storing a predetermined amount of powder to be produced, and the hopper
Is connected to the lower end of the container.
To make the powder in the hopper flow down
A nozzle portion, and the nozzle portion is arranged so as to be movable up and down.
And rises to the lower end opening of the nozzle.
The opening is closed by closing, and the descent is performed by descending.
A valve body for opening the lower end opening of the spill portion, and the valve body
Is mounted on the hopper and the nozzle section.
A valve body with the shaft center part slidably inserted vertically
A drive shaft and a nozzle are slidably fitted in the nozzle portion in the up-down direction, and contact with a portion of the container extending upward from the powder inlet, and press downward to press the portion downward. And biased pressing means.
The above object is achieved.

[0017]

In the powder filling apparatus according to the present invention, the powder stored in the hopper flows down to the nozzle portion while being rectified by the rectifying member by opening the lower end opening of the nozzle portion by the valve body. The container is filled at a high speed into the depressurized container fitted to the nozzle portion. The powder flowing down from the nozzle portion into the container collides with the buffer portion of the valve body, and the impact on the container is reduced. When the powder input port of the container is fitted to the nozzle portion, the valve element smoothly enters the container because the guide provided at the lower portion of the valve element guides the powder input port.
Since the gap between the nozzle portion and the container is small, powder is prevented from adhering to the outer peripheral surface of the nozzle portion. Even if the container is provided with a member extending upward from the powder inlet of the container, the container can be easily removed from the nozzle portion because the pressing means presses that portion downward.

[0018]

Embodiments of the present invention will be described below. The powder filling apparatus of the present invention is used, for example, when filling a toner used in an image forming apparatus into a container such as a bottle or a cartridge. As shown in FIG. 1, the toner filling device includes a rotary filling device 10 having six working units 20 which are arranged at equal intervals in the circumferential direction and are each integrally moved around in the direction of arrow A. The bottle 81, which is a container to be filled with the powder, is conveyed to the rotary filling device 10, and the loading conveyor 50 whose end portion is arranged close to the rotary filling device 10, and each working unit of the rotary filling device 10. 20
Meter 70 that measures and supplies a predetermined amount of toner to
And Each bottle 81 as a container that is sequentially conveyed by the carry-in conveyor 50 is provided with a container carry-in device 60 disposed between an end portion of the carry-in conveyor 50 and the rotary filling machine 10, and each working unit 20 of the rotary filling machine 10 is provided. Are sequentially loaded. The bottle 81 has a toner input port 81a projecting upward at the top.

Each working unit 20 of the rotary filling machine 10 includes:
It is intermittently moved to six work stations ST1 to ST6 arranged at equal intervals along the orbital movement area of each work unit 20, and each work station ST1 to ST6
In order to fill the bottle 81 with the toner, each step of the toner filling operation is sequentially performed. The bottle 81 in the work unit 20 filled with the toner is transferred from the work station ST6 to the carry-out conveyor 90 by the carry-out device 80. The carry-in conveyor 50 and the carry-out conveyor 90 extend linearly along the same straight line.

As shown in FIG. 2, the rotary filling device 10
A cylindrical mount 13 is provided at the center, and a direct drive motor (not shown) is built in the mount 13, for example. A hollow rotating shaft 12 connected to an output shaft of a direct drive motor provided in the pedestal 13 extends upward from an upper end surface of the pedestal 13. A hollow connecting shaft 11 is connected to the upper end of the rotating shaft 12,
One end of a horizontal hollow connecting shaft 14 is connected to the distal end of the connecting shaft 11. The other end of the horizontal connection shaft 14 is connected to a hollow base support 15 erected outside each of the work stations ST1 to ST6.

Hexagonal support plates 12a and 12b are fixed to the upper end and lower end of the rotating shaft 12 in a horizontal state, and each working unit 20 is attached to the outer peripheral edge of each support plate 12a and 12b. Each is attached. Each work unit 20
Has a toner supply mechanism 25 at an upper portion in which the toner to be filled in the bottle 81 is stored. Each toner supply mechanism 25 includes a hopper 25a for storing a predetermined amount of toner, a nozzle 26 connected to the hopper 25a,
6 and a valve body 27 arranged to be able to move up and down with respect to the lower end. In addition, at the bottom of each work unit 20, a bottle
A table 24c on which the table 81 is mounted and capable of ascending and descending in a horizontal state, and a table elevating mechanism 24 for elevating the table 24c
Further, a cylindrical capsule 23, which rises and lowers in an airtight manner with respect to the outer peripheral surface of the table 24c and makes the inside thereof a decompressed state, and a capsule lifting mechanism 30 for raising and lowering the capsule 23 are provided. When the capsule 23 is raised, the capsule 23 surrounds the periphery of the bottle 81 placed on the table 24c, and the upper end surface of the capsule 23 is provided below the toner supply mechanism 25 in a horizontal state. The lid 22a is joined in an airtight state. Thereby, the inside of the capsule 23 is made airtight.

As shown in FIG. 2, the rotary filling device 10
By the rotation of the rotating shaft 12, each work unit 20 is sequentially
The work stations ST1 to ST6 are intermittently moved so as to be located. At the work station ST1 close to the end of the carry-in conveyor 50, the bottle 81 is transferred from the end of the carry-in conveyor 50 onto the table 24c of the work unit 20. In the work station ST2, the capsule 23 is lifted, and the upper end surface of the capsule 23 abuts on the lid 22a in an airtight state. As a result, the inside of the capsule 23 is made airtight, and thereafter, the inside of the capsule 23 is primarily depressurized. At this time, the pressure in the bottle 81 is simultaneously reduced. At the work station ST3, a predetermined amount of toner is cut out from the toner weighing device 70 disposed above the work station 20 into the hopper 25a of the toner supply mechanism 25 in the work unit 20, and the table 24c located inside the capsule 23 is removed. The toner inlet 81a of the bottle 81 lifted and placed on the table 24c is positioned near the nozzle unit 26. In such a state, the inside of the capsule 23 is secondarily depressurized and the bottle 81
The pressure inside is also reduced. In the work station ST4, the table 24c is further raised, and the toner input port 81a of the bottle 81 is moved.
Is fitted to the nozzle portion 26. When the valve body 27 is lowered and the nozzle part 26 is opened, the toner supply mechanism is opened.
The toner in the hopper 25a at 25 flows down into the bottle 81. At this time, the pressure inside the capsule 23 is simultaneously increased, and the pressure around the bottle 81 is set to the atmospheric pressure. Then, in the station ST5, the capsule 23 and the table 24c
Is lowered, and the bottle 81 filled with the toner is transferred onto the carry-out conveyor 90 by the carry-out device 80 at the station ST6.

Each work unit 20, as shown in FIG.
It is detachable from support plates 12a and 12b attached to the rotating shaft 12. Each working unit 20 has a pair of columns 21 and 21 having a hollow cylindrical shape in a vertical state, and each column 21 has a pair of notches 16a provided on the outer peripheral portions of the support plates 12a and 12b. And 16a, and are supported vertically. A bottom plate 21a is supported at the lower end of each column 21 in a horizontal state. Above the bottom plate 21a, an upper fixed plate 21c is supported in a horizontal state at an appropriate interval.

The bottom plate 21a has a substantially square shape, and a table 24 on which a bottle 81 is placed is provided at the center of the upper surface thereof.
A table elevating mechanism 24 for driving the c up and down is provided. In addition, a capsule for raising and lowering a vertical cylindrical capsule 23 which is raised so as to surround the periphery of the bottle 81 placed on the table 24c, between the bottom plate 21a and the upper fixing plate 21c. An elevating mechanism 24 is also provided. The capsule 23 is an upper capsule 23 made of a transparent resin.
a and the lower capsule 23b are divided into two, and the upper capsule 23a and the lower capsule 23b are joined in an airtight state.

The hopper 25a of the toner supply mechanism 25 provided on the upper part of the work unit 20 is provided with an upper support plate 22b which is horizontally supported on an upper end of each of the columns 21, and a cutout provided on the upper support plate 22b. It is supported in a state of being fitted into the notch 22d. Below the upper support plate 22a, a lid 22a that is in contact with the upper end surface of the capsule 23 is supported in a horizontal state. The lid 22a and the upper support plate 22b are
Cylindrical connecting pipes 22c each fitted at the upper end of
And 22c are connected at a predetermined interval. A cylindrical connecting pipe 25b is connected to a lower end of the hopper 25a. The cover 22a is provided with a through hole 22e through which a connection pipe 25b connected to the lower end of the hopper 25a is inserted. The lid plate 22a is also provided with a pair of through holes 22f and 22g with the through hole 22e interposed therebetween. A fastening nut 25d is screw-connected to the connecting tube 25b inserted through the central through hole 22e from below. As a result, the hopper 25a and the connection pipe 25b are fixed to the upper support plate 22b and the lid 22a. A hopper 2 is provided inside the connecting pipe 25b.
Fill the toner in 5a with the bottle 81 placed on the table 24c.
The nozzle part 26 for flowing down is screwed,
Below this nozzle part 26, a valve body 27 for opening and closing the lower end opening of the nozzle part 26 is arranged so as to be able to move up and down. Valve 27
Is attached to the lower end of a valve body drive shaft 28 that passes through the shafts of the connecting pipe 25b and the hopper 25a.

FIG. 4 shows the details of the toner supply mechanism 25 provided on the upper part of the work unit 20. In the hopper 25a supported by the upper support plate 22b, a valve body drive shaft 28 passes through the shaft center. The valve body drive shaft 28 also penetrates the connection pipe 25b connected to the lower end of the hopper 25a, and the axis of the nozzle 26 connected to the lower end of the connection pipe 25b.
A valve body 27 is attached to the lower end of the valve. Nozzle part
26 is screw-coupled to the inner peripheral surface of the lower end of the connecting pipe 25b passing through the through hole 22e of the lid 22a. The connection pipe 25b is detachably connected to the upper support plate 22a by a fastening nut 25d. Therefore, the connecting pipe 25b is connected to the tightening nut 25d.
Can be easily detached from the connecting pipe 25b,
Further, since the nozzle portion 26 is detachably attached to the connection tube 25b by screw connection, various nozzle portions having different inner diameters can be easily replaced with the connection tube 25b.

The upper end of the valve body drive shaft 28 is
The valve body drive shaft 28 extends upward through a lid 25g that closes an upper end surface of the air cylinder 32 mounted on the lid 25g via a connecting rod 31. Are linked. The connecting rod 31 and the upper end of the valve body drive shaft 28 are connected by a connecting pin 31a. Therefore, the connecting rod 31 and the valve body drive shaft 28 can be easily separated. The lid 25g is provided with a cylindrical introduction pipe 25h for flowing the toner into the hopper 25a.
When the work unit 20 is located at the station ST3,
The introduction pipe portion 25h is positioned below the outlet of the toner measuring device 70 provided above the station ST3 in an aligned state. The cross-sectional area of the introduction pipe 25h and the internal volume of the hopper 25a are appropriately set so that the toner flowing from the toner measuring device 70 does not scatter.

The valve body drive shaft 28 has a larger diameter at the upper part 28a passing through the hopper 25a than at the lower part 28b passing through the connecting pipe 25b. Large-diameter upper part 2 passing through hopper 25a
The diameter of 8b is set so as not to be damaged by the pressure of the toner flowing into the hopper 25a.
The diameter of the lower portion 28b passing through the inside of the connecting tube 25b is set to 6% or less of the cross-sectional area of the toner passage area in the connecting tube 25b so that the toner flows smoothly in the connecting tube 25b.

At the lower part of the hopper 25a, a rectifying core 28c for rectifying the toner in the hopper 25a so as to smoothly flow down into the connecting pipe 25b is attached. The rectifying core 28c
Is supported in a vertical state by a support member 28x radially supported in a horizontal state on the inner peripheral surface of the hopper 25a, and the valve element drive shaft 28 can slide the axial center of the rectifying core 28c in the vertical direction. It is inserted. The rectifying core 28c has a large diameter at the center in the vertical direction, and includes an upper part 28d and a lower part 28e.
Has a truncated conical shape whose diameter is gradually reduced toward the upper end and the lower end, respectively. The inclination angle of the outer peripheral surface of the upper portion 28d of the rectifying core 28c is set so that the inclination angle is 50 degrees or more, which is the angle of repose of the toner, and the toner supplied into the hopper 25a is When a collision occurs on the outer peripheral surface of the 28d, the toner is prevented from rebounding and scattering around. Also, the lower part 28e of the rectifying core 28c
The outer peripheral surface is set at an inclination angle substantially the same as the inclination angle of the inner peripheral surface at the lower end portion of the hopper 25a to prevent toner from remaining at the lower end portion of the hopper 25a.

The nozzle portion 26 connected to the hopper 25a via the connecting tube 25b has an inner diameter similar to that of the connecting tube 25b, and as shown in FIG. 5, a lower end portion is smaller than an upper portion thereof. It has an outer diameter. A nozzle packing 26b is externally fitted to the lower end of the nozzle portion 26, and the nozzle packing 26b is abutted against a difference between the lower end and the upper portion of the nozzle 26. Nozzle packing 26b
Is hermetically pressed against the upper end surface of the toner inlet 81a of the bottle 81 fitted to the lower end of the nozzle portion 26. Since the lower end of the nozzle portion 26 inserted into the toner inlet 81a of the bottle 81 has a constant outer diameter as described above, the gap between the inner peripheral surface of the toner inlet 81a of the bottle 81 is small. Thus, the intrusion of the toner into the gap is suppressed.

As shown in FIG. 5, the valve body 27 attached to the lower end of the valve body drive shaft 28 has a truncated conical shape whose diameter is gradually reduced toward the upper side so as to fit into the nozzle part 26. An upper buffer portion 27a, a lower guide portion 27b in the shape of a truncated cone whose diameter is gradually reduced toward the lower side, a buffer portion 27a and a guide portion 27.
b) and an annular packing 27c interposed therebetween. A cylindrical concave portion 27j that opens downward is formed concentrically with the buffer portion 27a below the buffer portion 27a.
A cylindrical projection 27d fitted into the recess 27j is formed in the axial center of the lower guide 27b. A through hole 27k in which a thread groove is formed on the inner peripheral surface is provided in the axial portion of the buffer portion 27a, and a screw hole 27e is formed in the axial portion of the guide portion 27b in the through hole 27k. It is provided in alignment. A male screw portion 28f is provided at the lower end of the lower portion 28b of the valve body drive shaft 28, and the male screw portion 28f is formed in the through hole 27 of the buffer portion 27a.
k, and is inserted into the fitting hole 27e of the guide portion 27b through the through hole 27k. Packing 27
c is fitted to the protrusion 27d of the lower guide 27b and is sandwiched between the guide 27b and the upper buffer 27a. Upper buffer 2 for pressing the packing 27c
On the lower end surface of 7a, a projection 27m that protrudes sharply downward so as to bite into the upper surface of the packing 27c is provided annularly over the entire circumference. The packing 27c has a thin plate shape, and its outer peripheral edge extends outwardly from the outer peripheral surface of the lower end of the upper guide portion 27a.

When the entire valve body 27 is raised by raising the valve body drive shaft 28, the upper cushioning portion 27a is fitted into the lower end opening of the nozzle portion 26, and the outer peripheral edge of the packing 27c is fitted to the lower end surface of the nozzle portion 26. The nozzles come into contact with each other, and the lower end surface of the nozzle is hermetically pressed. Then, the valve body 27 is lowered by the lowering of the valve body drive shaft 28.
Is lowered, the packing 27c opens the lower end opening of the nozzle 26, and the toner stored in the hopper 25a flows down through the opening. The toner flowing down from the nozzle portion 26 collides with the buffer portion 27a of the valve body 27 located below the nozzle portion 26. Since the outer peripheral surface of the buffer 27a in the valve body 27 is inclined so as to gradually increase in diameter toward the lower side, the toner flowing down from the connecting pipe 25b is
By colliding with the outer peripheral surface 7a, the flow velocity of the toner is reduced. The outer peripheral surface of the portion near the packing 27c, which is the lower end of the buffer 27a, has a constant diameter smaller than the outer diameter of the packing 27c. Therefore, even if the axis of the valve body 27 is displaced from the axis of the nozzle 26, the lower end of the nozzle 26 is guided by the lower end of the buffer 27a, and the upper surface of the packing 27c is 26 It is designed to be securely pressed against the lower end face. The packing 27c has a thin plate shape, and furthermore, the protrusion 27m formed on the lower end surface of the buffer 27a is cut into the upper surface of the packing 27c.
There is no possibility that the toner will enter the axis of the toner.

The lower guide portion 27b of the valve body 27 is provided with a shoulder portion 27f whose diameter gradually increases from the outer peripheral surface of the packing 27c to the lower side. Below the shoulder portion 27f, a lower portion is provided. The outer peripheral surface 27g, whose diameter is gradually reduced as it becomes, is continuous. This outer peripheral surface is inclined at an angle of 45 degrees or more, and when the bottle 81 is raised and comes into contact with the nozzle packing 26b fitted to the nozzle part 26, the toner input port 8 of the bottle 81
Guide 1a.

The valve body 27 is designed to be replaced when the container filled with toner is changed. Valve body
27 releases the connection by the connection pin 31a between the valve body drive shaft 28 and the connection rod 31 that have penetrated the lid 25g of the hopper 25a,
By sliding the valve drive shaft 28 downward, the valve drive shaft 28 is detached from the toner supply unit 25 integrally with the valve drive shaft 28. When newly attaching the valve element 27 to the toner supply unit 25, the valve element drive shaft 28 to which the valve element 27 is attached is attached.
Into the hopper 25a.
The rectifier core 28d provided therein is inserted through the axial center of the rectifier core 28d, and penetrates the lid 25g of the hopper 25a. And the valve drive shaft
By connecting the upper end of 28 and the connecting rod 31 with the connecting pin 31a, the valve body 27 is attached to the toner supplier 25.

A cylindrical pusher member 100 is provided on the outer periphery of the nozzle portion 26. As shown in FIG. 6, the pusher member 100 has an opening on one side as a container filled with toner, and the opening is
When using the cartridge 82 covered by b,
It is provided to press the upper end of a slide plate 82b extending upward from the toner inlet 82a. The upper portion of the pusher member 100 has a cylindrical shape, and the lower portion thereof has a truncated conical shape whose diameter gradually decreases toward the lower side. In the upper part, recesses 110 that are open upward are formed at four locations at equal intervals in the circumferential direction, and a coil spring 111 is provided in each recess 110. Each of the coil springs 111 has a horizontal lower end face formed with a nozzle packing 26b attached to the nozzle portion 26.
The pusher member 100 is pressed downward so as to be located lower than that. In the lower part of the pusher member 100 having the shape of a truncated cone, four notches 120 opened downward at equal intervals in the circumferential direction so as to be located between the recesses.
Are formed, and a pin 121 fixed to the nozzle portion 26 is inserted into each notch 120 in a horizontal state. Each pin 121 is pressed downward by the coil spring 111 to prevent the pusher member 100 from falling downward.

As shown in FIG. 7, a table elevating mechanism 24 for elevating and lowering a table 24c on which a bottle 81 is placed, and a capsule elevating mechanism for elevating and lowering a capsule 23 forming a capsule decompression chamber, as shown in FIG. 30 are provided. The table elevating mechanism 24 has an air cylinder 24s, and the air cylinder 24s is a support 21 (see FIG. 3).
Is fixed in a vertical state on the central portion of the bottom plate 21a supported by the base plate 21a. The piston rod 24p of the air cylinder 24s is
The table 24c on which the bottle 81 is placed is supported at the tip of the piston rod 24p in a horizontal state. At the center of the upper surface of the table 24c, a columnar support 24d is provided so as to protrude upward. The bottle 81 placed on the table 24c is, for example,
The toner inlet 8 of the bottle 81 is held by the retainer 24e.
The support 1d is supported by the support 24d so as to be in an upright vertical state. At the lower end of the retainer 24e, a concave portion into which the support 24d of the table 24c can be fitted is provided. Also,
A wall 24f extending upward is provided on the outer periphery of the upper surface of the table 24c over the entire periphery.
This prevents the toner dropped on the table 24c from scattering around. The table 24c
Is formed of, for example, a white resin or a mirror-finished metal, and a drop in toner can be detected by detecting a change in the reflectance of the table 24c with an optical sensor.

The air cylinder 24s for raising and lowering the table
It is driven to expand and contract by high-pressure air.
When the piston rod 24p is driven in a direction to raise the table 24c so that the table 24c is raised, the pressure of the driving air is set lower than when the piston rod 24p is driven to move down.

An upper end surface of a cylindrical cover member 24b surrounding the air cylinder 24s is mounted below the table 24c at the tip of the piston rod 24p. Therefore, when the piston rod 24p of the air cylinder 24s rises, the cover member 24b rises together with the table 24c.

The capsule lifting mechanism 30 for raising and lowering the table 24c and the capsule 23 surrounding the bottle 81 placed on the table 24c is provided vertically between the bottom plate 21a and the upper fixed plate 21c (see FIG. 3). It has a rodless air cylinder 24h. The movable portion 30a of the air cylinder 24h has a movable plate 24g having a through hole 24y in the center.
Are supported in a horizontal state. 24g of movable plate
A cover member 24b surrounding the air cylinder 24s of the table elevating mechanism 24 is inserted through 24y. The movable plate 24g
Is slidably supported by a pair of guide shafts 24i on the side opposite to the air cylinder 24s,
Therefore, the movable plate 24g is raised and lowered in a horizontal state by a rodless air cylinder 24h. Each guide shaft 24i is supported vertically between the bottom plate 21a and the upper fixed plate 21c.

The cover member 24b that passes through the through hole 24y of the movable plate 24g passes through a cylindrical slider 24a provided on the movable plate 24g. On the inner peripheral surface of the slider 24a, a plurality of O-rings 24j and 24j that are in airtight contact with the outer peripheral surface of the cover member 24b are supported in ring grooves 24z provided at appropriate intervals in the vertical direction. Even when the cover member 24b and the movable plate 24g move up and down relatively, the airtight state between them is maintained by each O-ring 24j. Since each O-ring 24j is arranged above and below the slider 24a, the cover member 24b is attached to the slider 24a.
When the cover member 24b is moved up and down, the cover member 24b is prevented from tilting, and the cover member 24b is moved up and down in a vertical state. Also, the slider 2 in which each O-ring 24j is housed
A plurality of small holes 24k radially penetrating the slider 24a are formed in the ring groove 24z of 4a, and when removing each O-ring 24j, a pin is inserted into the small hole 24k from the outer peripheral surface of the slider 24a. By pressing the O-ring 24j inward, the O-ring 24j can be easily removed.

A capsule support 24x is fitted around the outer periphery of the slider 24a. A flange for supporting the lower end of the capsule 23 is provided on the outer peripheral surface of the lower end of the capsule support base 24x, and the capsule 23 is vertically supported on the flange. On the outer peripheral surface of the capsule support base 24x, a packing 24m that is in airtight contact with the inner peripheral surface of the capsule 23.
Is provided. Packing 24m, capsule support stand 24x
The capsule 23b is easily attached to and detached from the packing 24m between the capsule 23 and the capsule 23.
The elastic modulus is set so that a gap of 1.70 mm or more is formed with respect to the inner surface of the capsule 23 so that the airtightness with 24 m is not impaired.

When the capsule 23 is lifted by the air cylinder 24h in the capsule elevating mechanism 30, the upper end surface of the capsule 23 is hermetically pressed against the lower surface of the lid 22a supported by each column 21. As a result, the inside of the capsule 23 becomes airtight, and the table 24c and the bottle 81 are located in the airtight capsule 23. Inside the airtight capsule 23 is a decompressor attached to each work unit 20.
The pressure is reduced by 94 (see FIG. 8), whereby the pressure in the bottle 81 located in the capsule 23 is also reduced. When the pressure in the bottle 81 is reduced, the air cylinder 24s in the table elevating mechanism 24 is driven, and the bottle 81 is raised in the capsule 23. Then, the toner inlet 81a of the bottle 81 is fitted into the nozzle part 26.

The capsule 23 is formed by air-tightly joining an upper half and a lower half made of a transparent synthetic resin. Accordingly, since the capsule 23 can be easily separated into the upper half and the lower half, the maintenance and the like inside can be easily performed, and the transportability is excellent. Further, since the capsule 23 is made of a transparent synthetic resin, the fall of the toner in the capsule 23 can be detected visually or by an optical sensor provided outside.

The expansion / contraction stroke of the air cylinder 24s is
It is configured to be adjusted according to the height of the bottle 81 placed on the table 24c, and even when containers having different heights are placed on the table 24c, the containers are placed near the nozzle portion 26. , And can be easily fitted to the nozzle portion 26 as well. Further, since the height of the table 24c is equal to the height of the upper fixing plate 21c, the table elevating mechanism 24 is housed below the upper fixing plate 21c, and the entire work unit 20 is compact. Can be

As shown in FIG. 8, an exhaust type decompressor 94 is provided on each of the lids 22a abutting on the upper end surface of the capsule 23 in an airtight manner. Each decompressor 94 has a main passage 96 through which high-pressure air flows, and a sub-passage 97 communicating with the main passage 96 so as to be depressurized by the high-pressure air flowing through the main passage 96. Each of the sub passages 97 is connected to one through hole 22f (see FIG. 3) provided in the lid 22a via an on-off valve 93. Therefore, the capsule 23 is attached to the lid 22a.
When the high-pressure air flows through the main passage 96 of the pressure reducer 94 in a state where the pressure is pressed, the sub-passage 97 is depressurized, and the opening and closing valve 93 is opened, so that the capsule passes through the through hole 22f of the lid 22a. 23 is decompressed. Each exhaust type decompressor 94 provided in each work unit 20 is provided via an on-off valve 92,
It is connected to a single high pressure air supply 95. The high-pressure air supplied from the high-pressure air supply source 95 is supplied into the connection shaft 11 from the upper end of the hollow connection shaft 11 shown in FIG. It is supplied to the pressure reducer 94 attached to the body 22a via the on-off valve 92. The air exhausted from each decompressor 94 is
The air is discharged through a hollow rotary shaft 12 and a hollow output shaft of a direct drive motor to which the rotary shaft 12 is connected, through a hollow one of a pair of columns 21 to which each working unit 20 is attached. It has become so. In each exhaust-type decompressor 94, since high-pressure air flows through the internal passages 96 and 97, there is no possibility that fine dust such as toner stays in the respective passages 96 and 97. The through hole 2 of the lid 22a
2g is provided so as to be used when the inside of the capsule 23 in a reduced pressure state is returned to normal pressure, and the through hole 22g is opened and closed by an on-off valve (not shown).

As shown in FIG. 9, the stations ST4 and ST5 in which the working units 20 move around are provided with the introduction pipe portions 25h of the hoppers 25a provided in the working units 20 when the working units move around. Dust collecting hood facing
35 are provided respectively. Each dust collecting hood 35 is provided with a support rod 37 supported on the base post 15 of the rotary filler 10.
The dust collecting hood 35 is connected to one end of a dust collecting pipe 36 whose internal pressure is reduced. Further, a rotary cylinder 38 is supported on the base support 15, and the base end of a connecting arm 39 which is in a horizontal state is attached to the cylinder 38, and a distal end of the connecting arm 39 is provided. Is the hopper in each work unit 20
It faces the peripheral surface of 25a. The connecting arm 39 is reciprocated in a horizontal direction by a cylinder 38. A knocker 29 is attached to the distal end of the connecting arm 39 so as to face the peripheral surface of the hopper 25a. By driving the cylinder 38, the knocker 29 collides with the peripheral surface of the hopper 25a to give an impact. Has become.

In the station ST6, the nozzle 26 and the valve 27 of the toner supply unit 25 are fitted to
A cleaner 95 is provided to remove toner adhered to the inner peripheral surface of the nozzle 26, the inner peripheral surface of the hopper 25a, and the like. The toner adhering to the surface is sucked and removed.

The toner filling operation by the powder filling device having such a configuration will be described with reference to FIG. FIG.
As shown in (a), the working unit 20 that has circulated to the station ST1 is in a state where the capsule 23 is lowered to the lowermost side, and therefore, the table 24c is positioned at the same height as the upper end surface of the capsule 23. Have been. Further, a nozzle portion 26 at a lower end portion of the toner supply device 25 provided at an upper portion of the working unit 20 is closed by a valve body 27 moved upward. Then, the bottle 81 conveyed to the terminal end of the carry-in conveyor 50 is transferred by the carry-in device 60 onto the table 24c. When the bottle 81 is transferred onto the table 24c, each work unit 20 is moved around in an integrated manner, and the work unit 20 located in the station ST1 is located in the station ST2.

When the working unit 20 is located at the station ST2, first, as shown in FIG. 10B, the capsule raising / lowering mechanism 30 is driven, and the whole capsule 23 is raised. The capsule 23 is raised until its upper end is in close contact with the lower end surface of the lid 22a, and the upper end surface of the capsule is closed in an airtight state by the lid 22a. Thereby, the ascent of the capsule 23 is stopped. In such a state, in order to confirm that the upper end surface of the capsule 23 is hermetically sealed by the lid 22a, a pressure reducer 94 provided in the working unit 20 passes through the through hole 22f of the lid 22a. The pressure in the capsule 23 is reduced, and the pressure in the capsule 23 is reduced to, for example, -300 mmHg. Since the toner inlet 81a of the bottle 81 located in the capsule 23 is open, the pressure in the bottle 81 is reduced at the same time as the pressure in the capsule 23 is reduced.

By such a checking operation, the capsule 23
When it is confirmed that the upper end surface of the work unit 20 is sealed, the work unit 20 is moved around to the station ST3.
In the station ST3, a predetermined amount of toner is supplied from the toner meter 70 located above the toner supply unit 25 to the toner supply unit 25 whose lower end opening of the nozzle unit 26 is closed by the valve body 27. . Thereafter, the pressure in the capsule 23 is reduced to −500 mmHg. Due to the reduced pressure at this time,
At the same time, the pressure inside the bottle 81 is similarly reduced. Then, when the inside of the capsule 23 reaches −500 mmHg, the table lifting air cylinder 24s is driven, and the table 24c is raised to raise the bottle 81. As a result, the bottle 81 rises inside the capsule 23, and the cover member 24b that covers the piston rod 24p of the air cylinder 24s enters into the capsule 23. In this way, when the toner inlet 81a of the bottle 81 reaches a predetermined position near the nozzle 26, the driving of the air cylinder 24s is stopped. At this time, since the cylindrical cover member 24b sequentially enters the capsule 23, the degree of pressure reduction in the capsule 23 changes. For this reason, once the toner inlet 81a of the bottle 81 is in a state of being close to the nozzle 26 immediately before being fitted to the nozzle 26,
The lifting of the table 24c is stopped.

The elevation of the table 24c is stopped by detecting that the upper end surface of the bottle 81 has reached a predetermined position close to the nozzle section 26 by a level sensor provided outside the capsule 23.

The air cylinder 24s for raising the table 24c on which the bottle 81 is placed is configured to raise the table 24c by a relatively low air pressure.
Since the table 24c is sucked upward by the pressure reduction in the capsule 23, the table 24c is raised at a high speed even with the relatively low air pressure of the air cylinder 24s.

When the toner injection port 81a of the bottle 81 comes close to the nozzle 26 and the lifting of the bottle 81 is stopped, the piston rod 24p is attached to the air cylinder 24s.
A low air pressure is applied in the direction of lowering the air pressure. This air pressure is set so that the force applied to the table 24c is balanced with the upward force by the pressure in the capsule 23 being reduced, whereby the table 24c is reliably stopped at a predetermined height position. You.

As described above, in order to reliably stop the table 24c at the predetermined height position, the pressure F of the air applied to the air cylinder 24s in the direction in which the piston rod 24p is lowered is reduced by the capsule 23 when the table 24c stops. the degree of reduced pressure inside -XmmHg, when the cross-sectional area of the cover member 24b and ^{Bcm 2, F = B × (} 1 (Kg / cm 2) × (x / 760)), is set so as to satisfy.

As described above, the toner inlet 81a of the bottle 81
Is stopped at a predetermined position in the vicinity of the nozzle portion 26, the inside of the capsule 23 is further subjected to the secondary depressurization by the decompressor 94, and the inside of the capsule 23 and the inside of the bottle 81 are set to 98
% Until it reaches%. Then, when the inside of the capsule 23 and the inside of the bottle 81 are reduced to a predetermined pressure, the decompression by the pressure reducer 94 is stopped, and the inside of the capsule 23 and the inside of the bottle 81 are kept in the reduced state, and the next work is performed. The work unit 20 is moved around to the station ST4.

At work station ST4, FIG.
As shown in (d), the decompression of the capsule 23 is resumed,
The pressure inside the capsule 23 and the inside of the bottle 81 is reduced to the set pressure. Thus, at the work station ST3,
In order to raise the bottle 81 to a predetermined height position, the degree of decompression in the capsule 23 by the cover member 24b entering the capsule 23 is changed, but the bottle 81 is raised to a position close to the nozzle 26. When most of the amount of the cover member 24b finally entering the capsule 23 has entered the state, the table 24c is temporarily stopped rising, and then the inside of the capsule 23 is further depressurized to the set pressure. Thus, the pressure in the capsule 23 is accurately reduced to the set value.

When the pressure of the capsule 23 is reduced to the set pressure,
The table 24c is further raised so that the toner inlet 81a of the bottle 81 fits into the nozzle part 26. At this time, the valve body 27 that closes the lower end of the nozzle 26 is
The tapered outer peripheral surface 27g in 27b guides the toner inlet 81a of the bottle 81 so as to be concentric with the valve body 27, and enters the toner inlet 81a. Then, the valve body 27 enters the toner inlet 81a of the bottle 81, and the toner inlet 81a is air-tightly pressed against the lower end surface of the packing 26b fitted to the nozzle portion 26.

In such a state, the toner hopper
The air cylinder 32 mounted on the lid 25g of the 25a is driven, and the valve drive shaft 28 connected to the valve 27 is moved downward. As a result, the valve body 27 is lowered and the nozzle
The opening in the lower end of the hopper 25 is opened, and the toner in the hopper 25a is
By the upper part 28d of c, the water flows down smoothly to the nozzle part 26 while being rectified. Then, it flows down at high speed from the nozzle section 26 into the bottle 81 in a reduced pressure state. Even if air is blown up by compressing the toner in the lower part of the diameter of the hopper 25a, the air flow is rectified by the lower part 28e of the rectifier core 28d.
The turbulence does not occur in a, and the toner is smoothly
Flow down to At this time, at the same time, the through-hole 22g of the lid 22c pressed against the upper end surface of the capsule 23 is opened by opening the on-off valve attached to the through-hole 22g, and air is introduced into the capsule 23. Is done. As a result, the inside of the capsule 23 around the bottle 81 into which the toner flows at high speed is returned to the atmospheric pressure, and there is no possibility that the bottle 81 is damaged by the toner flowing at high speed.

The toner flowing into the bottle 81 is
Collision with the buffer 27a of the valve body 27 located below 26,
It flows down along the outer peripheral surface of the buffer 27a. As a result, the flow speed of the toner flowing into the bottle 81 is reduced, and the toner is prevented from violently colliding with the bottom of the bottle 81. Therefore, the occurrence of a toner blocking phenomenon in which the toner solidifies in the bottle 81 is prevented.

Further, when the valve element 27 is opened, the hopper 25a is vibrated by the knocker 29. As a result, the toner in the toner hopper 25a reliably flows down into the bottle 81 without staying.

Next, the work unit 20 is moved to the state shown in FIG.
And the knocker 29 provided in the station ST5 is driven to vibrate the hopper 25a, and the toner remaining in the hopper 25a is reliably discharged into the bottle 81. Then, when the knocker 29 is driven for a predetermined time, thereafter, the valve body 27
Is raised, and the lower end opening of the nozzle portion 26 is closed.
Thereafter, the table 24c is lowered to lower the bottle 81, and the capsule 23 is lowered. At this time, the air cylinder 24s that lowers the table 24c is driven at high speed by high-pressure air,
c is lowered at high speed.

After that, as shown in FIG. 10 (f), the working unit 20 is moved around to the last station ST6, and removes the toner-filled bottle 81 placed on the table 24c to the unloading device 80. From the table 24c onto the unloading conveyor 90. At this time, the station S
A cleaner 95 provided at T6 is fitted to the nozzle part 26, sucks the inside of the nozzle part 26, and the valve body 27, the nozzle 26
The toner adhered to the inner peripheral surface, the inner peripheral surface of the hopper 25a, and the like is removed. When the toner supply unit 25 of the working unit 20 is cleaned in this way, the working unit 20 is moved around to the station ST1 and the same operation as described above is repeated, so that the toner is stored in the bottle 81. Will be filled.

As shown in FIG. 6, a cartridge 8 having a slide plate 82b is
When using the cartridge 2, when the toner inlet 82a of the cartridge 82 is fitted to the nozzle portion 26 at the station ST4, the pusher member 100 is pressed by the slide plate 82b of the cartridge 82 and moves upward. become. Accordingly, when the filling of the toner is completed and the cartridge 82 is lowered, the slide plate 82b is pushed down by the pusher member 100, so that the toner input port 82a of the cartridge 82 is securely detached from the nozzle portion 26. Is done.

The present invention is not limited to the above embodiment. For example, as shown in FIG. 11, the inside of the capsule 23 is returned to the atmospheric pressure from the reduced pressure state by the lid 22a to which the capsule 23 is pressed. 22g through-hole for air introduction provided for
In addition, a small-diameter auxiliary through hole 22h to which an on-off valve is attached may be provided for introducing into the atmosphere. The auxiliary through hole 22h is
In the state where the inside of the capsule 23 in the working unit 20 is depressurized, if the toner filling operation is stopped for some reason, in order to return the inside of the capsule 23 in the depressurized state to the atmospheric pressure, a through hole 22g for introducing air is provided. Used instead. Since the auxiliary through-hole 22h has a small diameter, the air flows into the capsule 23 at a low speed, so that scattering of the toner in the capsule 23 is prevented. The on-off valve attached to the through-hole 22g for introducing air may be configured to be capable of adjusting the flow rate of the flowing air, so that the speed at which the capsule 23 in the decompressed state returns to the atmospheric pressure may be controlled.

[0065]

As described above, the powder filling apparatus of the present invention
Since the rectifying member is provided in the hopper that stores a predetermined amount of powder, the toner in the hopper can smoothly flow down to the nozzle portion. Further, since the drive shaft of the valve element that opens and closes the nozzle portion passes through the rectifying member, the valve element can be easily replaced. Since the valve body can buffer the powder flowing down from the nozzle portion when the nozzle portion is opened, there is no possibility that the powder solidifies in the container. Since the valve element guides the powder inlet when the powder inlet of the container is fitted to the nozzle, the container and the nozzle are reliably aligned. . Further, since the lower end of the nozzle portion into which the powder inlet of the container is fitted is shaped such that the gap with the powder inlet becomes smaller, the powder enters the gap. Is suppressed. The container can be reliably detached from the nozzle part by the pusher member provided in the nozzle part.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing an example of a powder filling device of the present invention.

FIG. 2 is a side view of the powder filling device.

FIG. 3 is an exploded perspective view of a working unit used in the powder filling device.

FIG. 4 is a vertical sectional view of a toner supply device provided on an upper part of the work unit.

FIG. 5 is a sectional view of a valve element provided in the toner supply device.

FIG. 6 is an operation explanatory view of a lower end portion of the toner supply device.

FIG. 7 is a vertical sectional view of a lower portion of the working unit.

FIG. 8 is a schematic configuration diagram of a pressure reducer used for each work unit.

FIG. 9 is a perspective view showing a dust collecting mechanism and a knocker provided in a work station.

FIGS. 10 (a) to 10 (f) are operation explanatory diagrams in each step of the filling apparatus of the present invention.

FIG. 11 is a schematic view showing another embodiment of the working unit used in the present invention.

[Explanation of symbols]

 10 Rotary Filler 20 Working Unit 23 Capsule 24 Table Elevating Mechanism 25 Toner Supply 25a Hopper 25b Connecting Pipe 26 Nozzle 26b Nozzle Packing 27 Valve 27a Buffer 27b Guide 28 Valve Drive Shaft 28c Rectifying Core 30 Capsule Elevating Mechanism 100 Pusher member

Claims (6)

(57) [Claims] 1. A method in which the inside and the outside of a container filled with powder are equilibrium depressurized, and the powder flows down into the container through a powder inlet of the container. An apparatus for filling powder into a container by increasing the pressure, comprising: a hopper for storing a predetermined amount of powder flowing down into the container; and a hopper connected to a lower end portion of the hopper; A nozzle part whose inlet is fitted to the lower end part to flow down the powder in the hopper downward, and is arranged so as to be able to move up and down with respect to the nozzle part, and the lower end opening part of the nozzle part by ascending And a valve body that closes the opening and lowers to open a lower end opening of the nozzle portion, the valve body being attached to a lower end portion, and a shaft center portion of the hopper and the nozzle portion. Is inserted so that it can slide up and down. A valve body drive shaft, wherein the valve body has a truncated cone shape whose diameter gradually decreases as the powder flowing down from the nozzle part becomes upper so as to collide with the outer peripheral surface, An upper buffer portion, in which a packing pressed into contact with a lower end opening is fitted, has a fixed outer diameter portion fitted into the nozzle portion adjacent to above the fitted packing. A powder filling device, characterized in that a powder filling device is provided. 2. A state in which the inside and outside of a container filled with powder are decompressed to an equilibrium state, and at the same time, the powder flows down into the container through a powder inlet of the container, and the outside of the container is An apparatus for filling powder into a container by increasing the pressure, comprising: a hopper for storing a predetermined amount of powder flowing down into the container; and a hopper connected to a lower end portion of the hopper; A nozzle part whose inlet is fitted to the lower end part to flow down the powder in the hopper downward, and is arranged so as to be able to move up and down with respect to the nozzle part, and the lower end opening part of the nozzle part by ascending A valve body that closes the opening by being inserted into the valve body and opens the lower end opening of the nozzle part by descending; a packing fitted to the valve body so as to be pressed against the nozzle part; A valve body is attached to the lower end, and the hopper And a valve body drive shaft through which the axial center of the nozzle part is slidably inserted in the up and down direction, wherein the valve body is configured such that powder flowing down from the nozzle part collides with the outer peripheral surface. An upper buffer portion having a truncated conical shape whose diameter is gradually reduced toward the upper side and a packing fitted to a lower portion,
A powder filling device comprising: a lower guide portion provided with a shoulder portion adjacent to the packing, the shoulder portion gradually increasing in diameter toward the lower side. 3. A state in which the inside and the outside of the container filled with the powder are decompressed to an equilibrium state, and the powder flows down into the container through the powder inlet of the container. An apparatus for filling powder into a container by increasing the pressure, comprising: a hopper for storing a predetermined amount of powder flowing down into the container; and a hopper connected to a lower end portion of the hopper; A nozzle part whose inlet is fitted to the lower end part to flow down the powder in the hopper downward, and is arranged so as to be able to move up and down with respect to the nozzle part, and the lower end opening part of the nozzle part by ascending A valve body that closes the opening by being inserted into the valve body and opens the lower end opening of the nozzle part by descending; a packing fitted to the valve body so as to be pressed against the nozzle part; A valve body is attached to the lower end, and the hopper And a valve body drive shaft through which the axial center of the nozzle part is slidably inserted in the up and down direction, wherein the valve body is configured such that powder flowing down from the nozzle part collides with the outer peripheral surface. An upper buffer portion having a truncated cone shape that gradually decreases in diameter toward the upper side, and a truncated cone shape that gradually decreases in diameter toward the lower side so as to guide the powder inlet of the container by the outer peripheral surface. A lower guide portion which is separable from the buffer portion, and has a flat plate shape in which the packing is sandwiched between the two and an outer peripheral portion extends outward from the buffer portion. A powder filling device, characterized in that: 4. The guide portion of the valve body has a projection protruding upward at an axial portion thereof, and a concave portion into which the projection is fitted is formed at the axial portion of the buffer portion. The powder filling device according to claim 3 , wherein the packing is fitted in a state in which the packing is in close contact with the protrusion. 5. The powder filling apparatus according to claim 3 , wherein a sharpened projection is provided on a contact surface of the valve body with the packing in the buffer portion, so as to bite into the packing. 6. A state in which the inside and the outside of the container filled with the powder are decompressed to an equilibrium state, and the powder flows down into the container through the powder inlet of the container. An apparatus for filling powder into a container by increasing pressure, a hopper for storing a predetermined amount of powder flowing down into the container, and connected to a lower end of the hopper, the powder in the container. A nozzle part whose inlet is fitted to the lower end part to flow down the powder in the hopper downward, and is arranged so as to be able to move up and down with respect to the nozzle part, and the lower end opening part of the nozzle part by ascending And a valve body that closes the opening and lowers to open a lower end opening of the nozzle portion, the valve body being attached to a lower end portion, and a shaft center portion of the hopper and the nozzle portion. Is inserted so that it can slide up and down. A body drive shaft, which is fitted to the nozzle portion so as to be slidable in the up-down direction, abuts on a portion extending upward from the powder inlet of the container, and is pressed downward so as to press the portion downward. And a pressing means urged toward the powder filling device.