JP2006131245A - Powdery granule filling apparatus and bag manufacturing and filling machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple structure and to suppress scattering of powdery granule during filling. <P>SOLUTION: A funnel tube 3 is provided on the tip side of a hopper storing the powdery granule. An auger screw 4 is provided in the funnel tube 3, and a cone member 11 is provided on its tip. The cone member 11 is formed into an approximately counter shape with a taper part 12 and a reverse taper part 13. On the outer periphery of the funnel tube 3, a shutter sleeve 15 is removably provided through a shield bush 16. The shutter sleeve 15 moves forward and backward to open and close an opening part 17 between the reverse taper part 13. The angle of slope β of a nozzle part 15b is made larger than the angle of slope γ of the reverse taper part 13. When the opening part 17 is enclosed, the tip edge of the nozzle part 15b comes into contact with the reverse taper part 13. When the opening part 17 is opened, the powdery granule is suppressed to spread by the nozzle part 15b and falls down. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a granular material filling apparatus and a bag making and filling machine for measuring and filling a granular material including powder, granular material, and the like into a container or bag.

Conventionally, as this kind of granular material filling device, for example, there are those described in Patent Documents 1, 2, and 3 below. In the powder filling apparatus described in Patent Document 1, a funnel tube having an auger screw is provided in the lower part of a hopper for storing powder, and a sleeve that is inscribed in the outer periphery of the funnel tube and moves up and down is provided at the opening of the funnel tube. Opposite cone cones are provided. The cone cone is separated from the opening by a spring connected to the sleeve on the outer periphery of the funnel tube, and powder is discharged from the opening to fill the container or bag, and the spring is compressed by air suction to open the cone cone. To block.
Further, in Patent Document 2, a sleeve nozzle for filling a container with toner is reduced in diameter according to the container, and the nozzle is made of a porous material. Then, the charging and stopping of the toner are controlled by supplying and exhausting air to the nozzle.
Moreover, in patent document 3, the auger screw is provided in the cylindrical nozzle part which supplies a granular material, and the conical cone which spreads in a taper shape is provided in the lower end of the auger screw. Then, by moving the auger screw up and down, the inclined surface of the conical cone is lifted and lowered or brought into contact with the nozzle portion. Thereby, the opening is opened and closed to control filling and stopping of the granular material.
JP-A-10-278901 JP 2000-335519 A JP 2004-18073 A

However, in the conventional powder and granular material filling devices described above, the ones described in Patent Documents 1 and 3 are such that the slope of the conical cone for opening and closing is opened or closed in contact with or away from the opening of the funnel tube or the nozzle part. Therefore, the powder particles flow down along the slope of the conical cone at the time of filling, and the powder particles diffuse in an umbrella shape and are packed in the container. Therefore, there exists a fault that a granular material will disperse | distribute inside a container and it takes time until it precipitates.
Furthermore, in the granular material filling device of Patent Document 3, when the auger screw is lifted to close the opening of the nozzle portion, the nozzle portion is clogged with the granular material, so that the lifting resistance is large and the auger screw moves up and down. However, there is a disadvantage that a large-scale device is required.
In addition, since the granular material filling device described in Patent Document 2 requires deaeration and compressed air for supplying and discharging air for controlling the granular material, a large-scale facility such as a compressor or an intake device is required. There is a drawback of needing.

  In view of such circumstances, an object of the present invention is to provide a powder filling device and a bag making and filling machine that have a simple structure and can suppress scattering of powder during filling.

The granular material filling device according to the present invention is provided with a cylindrical portion on the tip side of a hopper that accommodates the granular material, an auger screw is disposed inside the cylindrical portion, and the granular material is rotated by rotation of the auger screw. In a granular material filling device that discharges the gas from the opening of the cylindrical portion, a cone member that is provided at the tip of the auger screw and that has a tapered portion that expands toward the tip and a reverse tapered portion that reduces the diameter And a tapered nozzle portion that is provided in the vicinity of the opening of the cylindrical portion and can be moved forward and backward with respect to the cone member, and the nozzle portion is located between the reverse tapered portion of the cone member at the advanced position. An opening for discharging the ink is formed, and the opening is closed by abutting the reverse taper portion at the retracted position.
According to the present invention, the opening for filling the granular material can be opened and closed by moving the nozzle portion back and forth without moving the cone member connected to the auger screw. Moreover, at the time of closing, the tapered nozzle part is closed by contacting the reverse taper part of the cone member, so that the surrounding powder particles are easy to fall, and adherence of the powder particles rather than contacting the taper part. Less powder is good. Moreover, at the time of filling, scattering of the powder particles falling by the tapered nozzle portion can be suppressed to be small, and the time required for precipitation in a container or a bag is short.

Moreover, it is preferable that the inclination angle β of the nozzle portion is larger than the inclination angle γ of the reverse tapered portion of the cone member.
Since the tip edge of the nozzle portion comes into contact with the reverse taper portion of the cone member, a circular line contact is made, and there is less adhesion of the powder and the powder is good.
Moreover, it is preferable that the cone member and the nozzle portion can be replaced with different ones.
There are differences in properties such as fluidity, compressibility, bridging properties, etc., depending on the type and characteristics of the granular material, for example, granular materials with good fluidity are inclined angle α of the tapered part of the cone member and inclined angle of the nozzle part β is set large, and the granular material with poor fluidity is controlled by changing the inclination angle α of the tapered part of the cone member and the inclination angle β of the nozzle part to control fluidity, and changing the opening and closing timing of the opening. it can. Therefore, regardless of the type and characteristics of the granular material, there is no filling clogging or post-sagging of the granular material, the filling rate can be set evenly by controlling the filling speed, and quality deterioration and defective products are generated. Does not occur.

A bag making and filling machine according to the present invention inserts a belt-like packaging material between a bag making guide and a bag making tube to make a bag, and uses the powder filling device according to claim 1 or 2 to make a bag. A bag making and filling machine configured to fill a granular bag into a bag, wherein the nozzle portion is connected to a drive mechanism through a cord-like member between the tubular portion and the bag making tube, and the drive mechanism The nozzle portion is advanced and retracted with respect to the member.
Also according to the present invention, when filling the bag into the bag, the nozzle part can be moved back and forth by advancing and retracting the cord-like member by the driving means, and the manufacture of the bag is not disturbed. And similarly to the granular material filling apparatus mentioned above, it can open and close by advancing and retracting a nozzle part, and does not diffuse a granular material at the time of filling. Further, since the tapered nozzle portion is brought into contact with the reverse tapered portion of the cone member at the time of closing, there is little adhesion of the powder and the powder is good.

  According to the granular material filling device and the bag making and filling machine according to the present invention, the opening and closing of the cone member can be opened and closed by moving the nozzle portion forward and backward without moving the cone member connected to the auger screw. And the structure can be simplified. In addition, since the tapered nozzle part is closed by contacting the reverse taper part of the cone member, there is little adhesion of the powder and the powder breaks, and since the nozzle is tapered, the powder is scattered during filling. Can be kept small.

Next, a powder filling apparatus according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a schematic configuration diagram of the granular material filling device, and FIG. 2 is an enlarged view of an opening / closing portion of the granular material filling device shown in FIG.
In FIG. 1, a powder filling device 1 according to the present embodiment includes, for example, a substantially cylindrical funnel tube 3 (at the lower end in the drawing) of a hopper 2 that contains powdered material such as medium-ground coffee powder. The cylindrical part) is connected. An auger screw 4 having screw blades 4a is rotatably accommodated substantially coaxially from the hopper 2 to the tip opening 3a of the funnel tube 3. The base end side of the auger screw 4 is connected to an auger drive shaft 6 via a coupling 5.
The auger drive shaft 6 is connected to an auger shaft motor M1 formed of a servo motor. An agitator 8 is attached to an annular support portion 7 that is coaxial with the auger drive shaft 6, and the support portion 7 is connected to an agitator motor (not shown). The agitator 8 is pivoted independently of the auger drive shaft 6 and coaxially by the agitator motor via the support portion 9. As a result, the agitator 8 can appropriately mix the granular material F in the hopper 2 and can suppress an increase in apparent specific gravity.

In the tip opening 3a of the funnel tube 3 shown in FIGS. 1 and 2, a cone member 11 having a substantially abacus bead shape protrudes from the tip opening 3a from the tip of the auger screw 4. With the rotational axis of the auger screw 4 as O, the cone member 11 has a substantially truncated cone-shaped tapered portion 12 that gradually increases in diameter from the distal end of the auger screw 4 to the distal end side (downward side) in the rotational axis O direction. And a reverse tapered portion 13 having a substantially frustoconical shape that is further reduced in diameter in the direction of the rotation axis O from a ridge line portion 12a having the largest outer diameter.
The taper portion 12 forms an inclination angle α with respect to the rotation axis O, and the reverse taper portion 13 forms an inclination angle γ with respect to the rotation axis O in a direction opposite to α. The length of the taper portion 12 in the rotation axis O direction is set longer than that of the reverse taper portion 13. In addition, the circular ridgeline portion 12 a forming the maximum outer diameter of the cone member 11 is set smaller than the inner diameter of the funnel tube 3. Therefore, the granular material F discharged by the auger screw 4 flows along the taper part 12 and does not diffuse so much.

A shutter sleeve 15 is provided between the outer peripheral surface of the funnel tube 3 near the opening 3a and the cone member 11 so as to be able to advance and retract between the retracted position P1 and the advanced position P2 via the shield bush 16. The shutter sleeve 15 is a substantially cylindrical sleeve portion 15a located on the outer peripheral surface of the funnel tube 3, and a tapered or tapered nozzle portion 15b which is located on the distal end side of the opening 3a and gradually decreases in diameter with an inclination angle β. It consists of and. By interposing the cylindrical shield bush 16 between the funnel tube 3 and the sleeve portion 15a, it is possible to prevent the powder F from being bitten regardless of whether the shutter sleeve 15 is advanced or retracted.
With respect to the shutter sleeve 15, the nozzle portion 15 b is set such that the inclination angle β with respect to the rotation axis O is larger than the inclination angle γ of the reverse taper portion 13. Then, as shown by a two-dot chain line in FIG. 2, a gap is formed between the nozzle portion 15 b and the cone member 11 at the advance position P <b> 2 where the shutter sleeve 15 is lowered below the funnel tube 3. Opening 17 is formed. Further, as shown by a solid line in FIG. 2, at the retracted position P <b> 1 where the shutter sleeve 15 is raised above the funnel tube 3, the nozzle portion 15 b abuts against the reverse tapered portion 13 of the cone member 11 to close the opening portion 17.
Since the nozzle portion 15b is formed in a tapered shape at the advance position P2 of the shutter sleeve 15, the scattering of the powder F flowing along the tapered portion 12 can be suppressed, and the container A or the The time until it falls into the bag B and settles is shortened.

For example, an arm portion 18 that protrudes in the horizontal direction is connected to the sleeve portion 15 a of the shutter sleeve 15, and the free end portion 18 a of the arm portion 18 is substantially parallel to the rotation axis O provided on the fixed frame 19 of the powder filling device 1. The guide groove 20 is fitted so as to be movable up and down. A sleeve motor M2 made of a servo motor is attached to the fixed frame 19, and a male screw portion 21 connected to the output shaft is suspended downward and screwed into a screw hole 18b drilled in the arm portion 18. . Therefore, the shutter sleeve 15 is moved forward and backward through the arm portion 18 by rotating the male screw portion 21 forward and backward by the sleeve motor M2.
In addition, the auger shaft motor M1 and the sleeve motor M2 are electrically connected to the control unit 23. The control unit 23 sets the discharge amount of the granular material F by the rotation of the auger shaft motor M1, and controls the vertical movement range of the sleeve motor M2 to the distance L between the advance position P2 and the reverse position P1 described above. It also goes.

Here, the granular material F to be filled has different fluidity, bridging property, compressibility, and the like depending on its type and properties. Therefore, there is a difference in fluidity, bridging property, diffusibility, etc. when flowing through the tapered portion 12 according to the type and properties, and in accordance with this, the inclination angles α, γ, β of the cone member 11 and the shutter sleeve 15 It is necessary to adjust the opening area of the opening 17. Therefore, the cone member 11 and the shutter sleeve 15 can be attached and detached, and a plurality of types of cone members 11 and the shutter sleeve 15 can be exchanged according to the granular material F to be filled. This makes it possible to mount and arrange the cone member 11 and the shutter sleeve 15 that are optimal for the selected granular material F.
In addition, the retreat position P1, the advance position P2, and the distance L can be adjusted by the control unit 23 according to the selected cone member 11 and shutter sleeve 15.

The granular material filling device 1 according to the present embodiment has the above-described configuration, and the operation thereof will be described next.
In the granular material filling apparatus 1 shown in FIGS. 1 and 2, the shutter sleeve 15 is in the retracted position P <b> 1 with respect to the cone member 11 attached to the tip of the auger screw 4 in a state where the granular material F is accommodated in the hopper 2. The nozzle portion 15b is in circular contact with the reverse taper portion 13 of the cone member 11 so as to close the opening 17 with the funnel tube 3.
From this state, an opening signal is output from the controller 23 to drive the sleeve motor M2 and the auger shaft motor M1. Then, the arm portion 18 is lowered via the female screw portion 18b in which the male screw portion 21 is rotated and screwed, and the shutter sleeve 15 moves from the retracted position P1 to the advanced position P2 by a distance L. As a result, the nozzle portion 15 b of the shutter sleeve 15 is separated from the reverse taper portion 13 of the cone member 11, and the opening portion 17 is opened.
At the same time, the auger screw 4 rotates around the central axis O through the auger drive shaft 6 by driving the auger shaft motor M1. Therefore, the granular material filled between the funnel tube 3 and the screw blades 4a of the auger screw 4 draws a spiral motion accompanying the rotation of the auger screw 4 and is measured from the opening 3a of the funnel tube 3. Body F falls.

Then, a part on the center side of the falling granular material collides with the tapered portion 12 of the cone member 11 and flows down along the tapered surface with the inclination angle α. The granular material F scattered by the tapered portion 12 collides with the outer peripheral side granular material F in the funnel tube 3 against the tapered inner peripheral surface of the nozzle portion 15b and flows inward along this. Therefore, the granular material F falling into the container A from the opening 17 flows and accumulates in the vicinity near the rotation axis O of the auger screw 4 without diffusing widely in the form of an umbrella.
Therefore, the granular material F filled in the container is deposited and deposited in the container in a short time with little scattering due to ejection.

And when filling of the granular material F into a container is complete | finished, while the auger screw 4 is stopped by the control part 23, the sleeve motor M2 is reversely rotated. As a result, the shutter sleeve 15 moves from the advanced position P2 to the retracted position P1 via the male screw portion 21 and the arm portion 18, and the tip edge of the nozzle portion 15b makes line contact with the entire circumference of the reverse tapered portion 13.
At this time, since the reverse tapered portion 13 is inclined in the direction of reducing the diameter toward the lower end side, the granular material F adhering to the tapered surface easily falls into the container and there is almost no adhesion residue. Therefore, the granular material F adhering when the tip edge of the nozzle portion 15b comes into contact with the tapered surface of the reverse tapered portion 13 can be closed without being bitten. Moreover, since the inclination angle β of the nozzle portion 15b is set to be larger than the inclination angle γ of the reverse taper portion 13, line contact is made over the entire circumference, and the blockage can be more reliably performed.
Regarding the operation control by the control unit 23, preferably, the nozzle unit 15b is controlled to abut on the reverse taper unit 13 immediately before the auger screw 4 stops. As a result, the nozzle part 15b rotates relative to the reverse taper part 13 in contact with the nozzle part 15b.

As described above, according to the granular material filling device 1 of the present embodiment, at the time of discharging and filling the granular material F, it is possible to suppress scattering around the granular material F by the tapered nozzle portion 15b, Precipitates in a short time in the container. Further, when the opening portion 17 is closed, the nozzle portion 15b makes a line contact with the reverse tapered portion 13 of the cone member 11 in a circular line, so that the nozzle portion 15b is less attached and good in chipping, and can suppress biting.
Further, since the cone member 11 and the shutter sleeve 15 can be exchanged, an optimum one can be attached according to the type and properties of the powder F, and the control unit 23 changes the opening / closing timing and the advance / retreat distance L for opening / closing. Since it can be adjusted, there is also an advantage that filling clogging and trailing sag of the granular material F are prevented, there is no weighing error of the filling amount, and no defective product is generated.

Next, a second embodiment of the present invention will be described with reference to FIG.
FIG. 3 shows a bag making and filling machine 30 according to the second embodiment, and this bag making and filling machine 30 includes the powder filling device 1 according to the first embodiment described above. The drive mechanism of the shutter sleeve 15 including the arm portion 18, the male screw portion 21, the sleeve motor M2, and the like is not included.
In the bag making and filling machine 30 according to the present embodiment, a cylindrical bag making tube 31 is disposed on the outer peripheral side of the funnel tube 3 and the shutter sleeve 15 of the powder filling device 1. A bag making guide 32 is provided on the outer peripheral side of the upper portion. Therefore, a belt-like film (wrapping material) fed out from a roll (not shown) is formed into a cylindrical shape by a bag making guide 32 and inserted into a substantially cylindrical space between the bag making guide 32 and the bag making tube 31. Is done.
It is assumed that a well-known bag making mechanism 29 is adopted for subsequent film bag making. The bag making mechanism 29 (not shown in the figure) includes a vertical seal that seals the seam in the width direction of the tubular film below the bag making guide 32, a feed roller that feeds the tubular film downward, and a tubular shape. A horizontal sealer that seals the film in the horizontal direction and a cutter that cuts the middle of the horizontal seal portion and divides it into a top seal portion of the lower bag and a bottom seal portion of the next bag. And it will be in the state which inserted the shutter sleeve 15 of the granular material filling apparatus 1 in the upper opening of the following bag B with which the bottom part was sealed.

Therefore, in FIG. 3, the shutter sleeve 15 protrudes downward from the front end opening of the bag making tube 31.
A wire 33 (corrugated member) is connected to the proximal end (upper end) of the sleeve 15a of the shutter sleeve 15. The wire 33 passes through a space 34 between the bag-making tube 31 and the funnel tube 3 on the inner side thereof, is wound around a pulley 35 positioned further above the upper end of the bag-making tube 31, and then extends outward in the lateral direction. It is connected to the drum 36. The drum 36 is connected to an output shaft of a drive motor M3 made of, for example, a servo motor so as to be able to rotate forward and backward, for example. These constitute the driving means 38.
Therefore, in order to raise the shutter sleeve 15 to the retreat position P1, the drive motor M3 is driven and the wire 33 is wound up by the distance L from the advance position P2 by the drum 36. In order to lower the shutter sleeve 15 from the retracted position P1 to the advanced position P2, when the drive motor M is rotated backward by the distance L of the wire 33, the shutter sleeve 15 is filled with powder particles. The wire 33 is lowered by its own weight, and the wire 33 is fed out from the drum 36.

  Therefore, by lowering the shutter sleeve 15 to the advance position P2 and rotating the auger funnel tube 4, it is possible to fill the bag with the powder F by a predetermined amount. The effect | action at the time of filling the granular material F in a bag is the same as the granular material filling apparatus 1 by the 1st form mentioned above. Then, after filling, the upper end of the bag B is sealed with the above-described horizontal sealer.

  As described above, in the bag making and filling machine 30 according to the present embodiment, the same effect can be obtained with the powder filling device 1 according to the first embodiment.

In the above-described embodiment, the inclination angle γ of the reverse taper portion 13 is made smaller than the inclination angle β of the nozzle portion 15b of the shutter sleeve 15. However, even if the inclination angle γ is larger than the inclination angle β. In this case, the nozzle portion 15b is in line contact with the ridge line portion 12a to close the opening portion 17. In the case of the inclination angle β = γ, the reverse tapered portion 13 and the nozzle portion 15b are in surface contact with each other. In any case, the nozzle portion 15b may be in contact with the entire circumference of the frustoconical surface (which may be conical) of the reverse taper portion 13 to close the opening 17.
Moreover, a chain, a rope, etc. are employable, without being limited to the wire 33 as a cord-shaped member.

It is a schematic block diagram of the granular material filling apparatus by 1st embodiment of this invention. It is an enlarged view of the front end side part of the granular material filling apparatus shown in FIG. It is a schematic block diagram of the bag making filling machine containing the granular material filling apparatus by 1st embodiment.

Explanation of symbols

1 Powder and Particle Filling Device 3 Funnel Tube (Cylindrical Part)
4 auger screw 11 cone member 12 taper part 13 reverse taper part 15 shutter sleeve 15a sleeve part 15b nozzle part 17 opening part 36 drum 38 drive means M2 sleeve motor M3 drive motor

Claims (4)

A cylindrical portion is provided on the tip side of the hopper that accommodates the granular material, an auger screw is disposed inside the cylindrical portion, and the granular material is discharged from the opening of the cylindrical portion by rotation of the auger screw. In the powder and granular material filling device,
A cone member that is provided at the tip of the auger screw and that has a tapered portion that expands toward the tip and a reverse tapered portion that reduces the diameter;
A tapered nozzle portion provided near the opening of the cylindrical portion and capable of moving back and forth with respect to the cone member;
The nozzle portion forms an opening for discharging the granular material between the nozzle portion and the reverse taper portion of the cone member, and contacts the reverse taper portion to close the opening portion in the retracted position. The granular material supply apparatus characterized by having made it.   2. The granular material filling apparatus according to claim 1, wherein the inclination angle of the nozzle portion is larger than the inclination angle of the reverse taper portion of the cone member.   3. The granular material filling apparatus according to claim 1, wherein the cone member and the nozzle portion can be replaced with different ones. A belt-shaped packaging material is inserted between the bag-making guide and the bag-making tube to make a bag by a bag-making mechanism, and the bag-making tube is made by using the powder filling device according to any one of claims 1 to 3. A bag making and filling machine configured to fill the powder in a bag made by arranging the cylindrical portion on the inside,
The nozzle part is connected to a driving means through a cord-like member in a space between the cylindrical part and the bag-making tube, and the nozzle part is advanced and retracted with respect to the cone member by the driving means. Filling machine.

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