JPH08192802A - Filling-up method of powdered material into container - Google Patents

Abstract

PURPOSE: To stuff a powdered material in a container at a high accuracy, by calculating the specific gravity or the powdered material on the basis of the weight and volume of powdered material fed from a large scale feed measuring hopper and calculating the difference between the measured weight and the preset weight and controlling an additional feed quantity. CONSTITUTION: A vacant container C is placed on a load cell base 5a of a turntable 5 and a powdered material is fed in a large scale feed measuring hopper 8 and a smaller scale feed measuring hopper 9 by a charger 10. The powdered material is cut by rubbing by means of a rubbing guide to charge a specified quantity in the larger and smaller measuring hoppers 8, 9. When a cylinder 80 is actuated in this state, a shutter 8b for larger feed is opened and the powdered material in the hopper 8 is fed in a container C. In this time, the weight of the larger feed is measured and the specific gravity thereof is calculated on the basis of the weight W and the volume of the measuring hopper and the difference between the preset weight and the measured weight W is calculated. The powdered material is additionally fed from the smaller scale feed measuring hopper 9 in accordance with the weight difference and the specific gravity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for filling a container with a powder or granular material such as a detergent or a drug.

[0002]

2. Description of the Related Art As a prior art relating to quantitative measurement of powder and granules, JP-A-54-113362 and JP-A-58-1.
The one disclosed in Japanese Patent No. 40617 is known.

The "quantitative automatic weighing machine for powders and granules" disclosed in Japanese Patent Laid-Open No. 54-11362 mentioned above measures the volume of a large quantity of powder and granules with a large loading meter, and at the same time, weighs. A small amount is continuously poured from a small hole while measuring the weight with a container, and when the amount approaches a predetermined amount, the small hole is closed to complete the filling.

Further, in the "Automatic measuring method of powder and granular material" disclosed in the above-mentioned Japanese Patent Laid-Open No. 58-140617, the batch is measured by a unit of a small charging metering unit by measuring a large charging amount and measuring a shortage from a set value. It is a method of supplementing by filling.

[0005]

By the way, in the above-mentioned "quantitative automatic weighing machine for powder and granular material", since the small injection of the powder and granular material is caused by the outflow from the small holes, in order to obtain the filling accuracy,
The diameter of the hole must be smaller than that of the large inlet. However, if the shape of the hole is made smaller in this way, the flow rate becomes smaller, and the time required for the small injection is inevitably extended, and there is a limit in improving the filling and filling accuracy.

In addition, the above-mentioned "automatic measuring method of powder and granular material" is
Since the small amount of powder and granules is batch-processed by arranging a large number of weighing boxes of the same volume, and the step size of the filling amount by small loading is determined by the volume of the weighing box, to improve the filling accuracy. There was a limit. Moreover, since the weight of the powder or granules entering the small input weighing box is not measured, if the specific gravity of the powder or granular material changes due to the water content of the powder or granular material, the powder or granular material enters the small input weighing box. Since the weight of the powder and granules changes, even if the same amount is filled with respect to the required amount, the actual filling amount varies, and the filling accuracy must be lowered.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method and apparatus for filling a powdery or granular material into a container which can be filled with high precision.

[0008]

The invention according to claim 1 of the present invention is to measure the volume of the granules by filling the granules in the large-dispensing weighing cell and the small-dispensing weighing cell, respectively. Then, the weight W of the powder or granules charged from the large charging metering box after charging the powder or granular material in the large charging metering box into a container
₁ is measured, and the specific gravity ρ _{1 of the} granular material is calculated based on the weight W ₁ and the volume V of the large-dispensing weighing box, and the weight difference Wc between the set filling weight W and the weight W ₁ is calculated. Then
To provide a method for filling a powdery or granular material into a container, characterized in that the powdery or granular material in the small charging metering box is additionally charged into the container based on the weight difference Wc and the specific gravity ρ _1. The above-mentioned object is achieved.

According to a second aspect of the present invention, in the method of filling the container with the powdery or granular material according to the first aspect, the powder added additionally from the weight difference Wc and the small dosing weighing box. There is provided a method for filling a powder or granular material into a container, characterized in that the specific gravity ρ ₁ is corrected based on a difference from the actual weight Wr of the granular material.

The invention according to claim 3 of the present invention is a device capable of suitably carrying out the method for filling a powder or granular material according to claim 1 into a container. A large-charging metering box equipped with a mechanism, a small-charging metering box equipped with a second charging mechanism for additionally charging powder and granular material into the container, and a powder for the large-charging measuring box and the small-charging measuring box. Filling means for filling, and a conveying means for conveying the container equipped with a measuring device,
Of the weight W ₁ of the powder and granules charged from the large-loading weighing box, the specific gravity ρ ₁ of the powder and granules calculated from the volume V of the large-loading weighing box, and the set filling weight W and the weight W ₁ . A container filling device for powdery or granular material, comprising: a control unit that operates the second charging mechanism based on a weight difference Wc.

[0011]

In the method of filling a container with a powder or granular material according to the first aspect of the present invention, the powder or granular material is filled in each of the large-charging and small-charging measuring boxes. The volume is measured, and then the powder and granules in the large-loading measuring box are charged into a container. Then, the weight W ₁ of the powder and granules charged from the above-mentioned large-charging weighing box is measured, and the specific gravity ρ _{1 of the} powder and granules is determined based on the weight W ₁ and the volume V of the above-mentioned large-charging weighing cell.
Is calculated and the set filling weight W and the above weight W ₁
And a weight difference Wc between the weight difference Wc and the specific gravity ρ ₁ is added, and the powder and granules in the small charging weighing box are additionally charged into the container. The filling accuracy is improved.

According to a second aspect of the present invention, there is provided a method for filling a powder or granular material into a container. In addition to the function of the method for filling the powder or granular material into the container according to the first aspect, the weight difference Wc is Since the specific gravity ρ ₁ is corrected on the basis of the difference between the actual weight Wr of the powder and granules additionally charged from the small charging metering box, the accuracy of filling the powder and granules in the container is further enhanced.

In the apparatus for filling a powder or granular material into a container according to a third aspect of the present invention, the powder or granular material is filled in the large charging weighing cell or the small charging weighing cell by the filling means, The granules filled in the large-charging weighing cell and the small-charging weighing cell are charged and additionally charged into the container conveyed by the conveying means. First, the first charging mechanism operates. Then, the powder or granular material in the large-loading weighing box is charged into the container. Then, the weight W ₁ of the powder or granular material charged from the large-input weighing unit is measured by the measuring device, and the specific gravity ρ of the powder or granular material calculated from the weight W ₁ and the volume V of the large-input weighing unit. ₁ and the second loading mechanism is operated under the control of the control unit based on the weight difference Wc between the set filling weight W and the weight W _1, and the granular material filled in the small dosing weighing box is Additional input.

[0014]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 and FIG. 2 show a rotary type powder / granular continuous filling device which is an embodiment of a powder / granular substance filling device according to the present invention. In the figure, reference numeral 1 indicates a rotary type powder / granular material continuous filling device (hereinafter referred to as “powder / granular material filling device”), and C indicates a container.

As shown in FIG. 1, the powdery or granular material filling device 1 has a frame body 2 in which a motor 3 having a reduction gear unit and a drive shaft 4 rotated by the motor 3 are mounted.
A turntable (container conveying means) 5 inserted and fixed to the drive shaft 4, a turret board 6 similarly inserted and fixed to the drive shaft 4 above the turntable 5, and a turret board. A plurality of loading guides 7 fixed substantially vertically to the lower surface side of the board portion 6a along the peripheral edge portion of 6 are provided.

A load cell base (measurement device) 5a is arranged on the turntable 5 so as to be located below each of the loading guides 7, and a load cell (not shown) of the load cell base 8 is provided. The strain amount is converted into weight so that the weight of the container being transported can be measured. In addition, in the above-mentioned powder and granule filling device 1, this turntable 5
Adjacent to the turntable 5, the supply star wheel 5b for supplying the container C to the turntable 5 and the turntable 5 are provided.
A discharging star wheel 5c for discharging the container C from the container is provided (see FIG. 5).

The turret board 6 includes a disk section 6a having a circular shape in plan view, and an erected wall section 6b standing upwardly provided on an outer peripheral end of the disk section 6a. Further, the board portion 6a is provided with holes 6 for the large-dispensing weighing cell 8 and the small-dispensing weighing cell 9, which will be described later, so as to be located in the dosing guide 7.
c and a hole 6d are formed, and the large-injection weighing cell 8 and the small-introduction weighing cell 9 are filled with the powdery particles through the holes 6c and 6d.

Above the turret board 6, a powder and particle supply chute 10a for supplying the powder and particles onto the turret board 6 is provided.
Are supported by the frame body 2 via a supporting member (not shown). Further, a semicircular arc-shaped distribution guide 10b for distributing the powder and granular material supplied by the powder and granular material supply chute 10a to a predetermined range on the disk portion 6a and the granular material at the radial middle portion of the disk portion 6a. Of the powder and granules filled in the powder feeding guide 10c and the large-loading weighing box 8 and the small-loading weighing box 9 for moving the turret plate 6 into rotation. Accordingly, a fraying guide 10d for flushing with the board surface 6a is supported and fixed by the frame body 2 via the supporting member 2a. The turret board 6, the powder and grain supply chute 10a, and the guides 10b, 10c, 10
d constitutes the filling means 10.

As shown in FIG. 2, the large-dispensing weighing box 8 opens and closes a rectangular large-dispensing sleeve 8a in plan view and a lower end opening (discharging port) of the large-disposing sleeve 8a. And a shutter 8b for large injection. A cam follower 8c projecting to the outside of the closing guide 7 is provided on the large closing shutter 8b.
Then, by moving the cam follower 8c up and down by the rod 80a of the piston / cylinder mechanism (first closing mechanism) 80 arranged outside the large closing guide 7, the large closing shutter 8b is opened. The pin 8d is vertically rotated about the fulcrum so that the powder or granular material of the large-dispensing weighing box 8 is charged into the container C.

The small dosing metering box 9 is a small dosing sleeve 9a formed integrally with the wall portion 7a of the dosing guide 7 and having a rectangular shape in plan view, and the small dosing sleeve 9a.
The shutter 9b for small insertion opens and closes the lower end opening of the. This small throwing shutter 9b is connected at one end to a rod 90a of an electric piston / cylinder mechanism (second closing mechanism) 90 attached to the outside of the throwing guide 7 and horizontally holds this rod 90a. The small charging metering box 9 is opened and closed by advancing and retreating in the direction, and the powdery particles are additionally charged into the container C. The electric piston cylinder mechanism 90 is
A servo motor (not shown) is used as a drive source, and the opening / closing pattern of the small-input shutter 9b can be determined by operating this servo motor in a predetermined operation pattern in accordance with a command from a controller described later. .

The powder / grain filling device 1 is equipped with a controller (control section) 11. Then, the controller 11 drives the motor 3, supplies the granular material from the granular material supply chute 10a, operates the piston / cylinder mechanism 80, operates the electric piston / cylinder mechanism 90, and loads the load cell. A series of commands for measuring the weight of the container C based on the output from the table 5a and correcting specific gravity described later are performed.

Next, a method of filling the powdery or granular material in the container according to the present invention will be described based on the operation by the powdery or granular material filling apparatus 1 according to the above-mentioned embodiment with reference to FIGS. .
In addition, in the following description, a single large-capacity weighing cell and a single small-load weighing cell will be described.

As shown in FIG. 3, first, an empty container C is conveyed by the conveyer 12 and the pitch adjusting device 13 and placed on the load cell table 5a on the turntable 5 by the supply star wheel 5b. . At this time, above that, the volume is measured after the powder and granules are filled in the large-introduction measuring box 8 and the small-introduction measuring box 9 (see FIGS. 4 and 6a).

Then, the powder and granules are ground by the scraping guide 10d, and the powder and granules are volume-measured in the large-input weighing unit 8 and the small-input weighing unit 9. (Figs. 4 and 6
b)).

Then, when the drive shaft 4 rotates by a predetermined angle, the piston / cylinder mechanism 80 starts to operate according to an instruction from the controller 11, and the cam follower 8c is pulled upward by the rod 80a. And the shutter 8b for large throw is the pin 8d.
Is vertically rotated with the fulcrum as a fulcrum, and the large charging metering box 8 is opened to charge the powder or granular material into the container C (see FIGS. 4, 5, and 6c).

Next, the piston / cylinder mechanism 80 is actuated to close the large input shutter 8b, and the load cell base 5 is closed.
When the vibration of a is stable, the large input weight W ₁ is measured (see FIGS. 4, 5 and 7a). Then, to calculate the specific gravity [rho ₁ of the particulate material based on the volume V of the full flow weight W ₁ and the full flow metering squares 8 was measured, the weight difference Wc between the set filling weight W and the weight W ₁ The weight difference Wc is calculated and used as the set additional input amount of the powder or granular material from the small input weighing box 9 (see FIG. 5). Then, based on the set additional input amount Wc and the specific gravity ρ ₁ , the controller 11 determines the stroke movement amount of the small input shutter 9b corresponding thereto, and the electric piston / cylinder mechanism 90 is operated to operate as described above. The shutter 9 for small dosing is opened, and the granular material is additionally put into the container C from the weighing box 9 for small dosing (see FIGS. 4, 5 and 7b).

In the powdery or granular material filling device 1, the relationship between the stroke movement amount of the small-input shutter 9b, the set additional input amount Wc, and the specific gravity ρ ₁ is verified in advance by a test, and the relational data table of these is shown in the controller 11 above. Specific input amount Wc and the specific gravity ρ ₁
The stroke movement amount of the small throw shutter 9b corresponding to the above is determined, and the electric piston / cylinder mechanism 90 is operated based on this.

The operation of the piston / cylinder mechanism 90 is carried out by a data table relating the additional charging amount Wc, the specific gravity ρ ₁ and the opening time of the small charging shutter 9b, or the additional charging amount Wc, the specific gravity ρ ₁ , the small charging shutter. It is also possible to input a relational data table or the like of the opening time of 9b and the stroke movement amount of the small insertion shutter 9b to the controller 11 and operate the electric piston / cylinder mechanism 90 in accordance with the data table.

After completion of the predetermined addition of the powder or granules,
When the electric piston / cylinder mechanism 90 is activated to close the small charging shutter 9b and the vibration of the load cell base 5a is stabilized, the total weight W ₂ is finally measured (see FIGS. 5 and 7c). Then, as shown in FIG. 3, it is guided to the carry-out conveyor 14 by the discharge star wheel 5c and is transferred to the subsequent processes such as packaging.

According to the method of filling the powdery or granular material of the present invention into the container, the above-mentioned procedure enables more accurate filling than the conventional method. The specific gravity ρ ₁ is corrected.

The specific gravity of the powder or granular material may be changed delicately under the influence of humidity or the like, or the specific gravity may be largely changed at the joint of batch processing. In this way, even if the specific gravity of the powder or granular material changes, in order not to reduce the filling accuracy, the actual amount of the powder or granular material additionally charged from the small charging amount Wc and the small charging weighing cell 9 is set. The specific gravity ρ ₁ is corrected each time based on the difference from Wr, and the corrected specific gravity ρ ₂
And a shutter 9 for small injection corresponding to the small injection amount Wc
The stroke movement amount of b is selected from the above relational data table, and additional charging from the small charging metering box 9 thereafter is performed.

That is, as shown in FIG.
Of the setting additional input amount Wc of the measuring box 9 and the actual additional input amount Wr
Difference (hereinafter referred to as actual difference A) and arbitrarily set tolerance R
Compare with (small value). And the absolute value of the actual difference A is
If the difference is less than R, the specific gravity ρ₁Is not corrected ρ
₂= Ρ₁As a strobe for the subsequent small insertion shutter 9b
Select the amount of movement. Also, the difference between the actual difference A and the tolerance R is
If the value is positive, it is judged that the powder is light and the specific gravity
ρ₁Is corrected so that₂= Ρ₁+ Α), and later
Select the stroke movement amount of the small throw shutter 9b
It Conversely, when the difference between the actual difference A and the tolerance R is a negative value,
, The specific gravity ρ₁To lower
To (ρ₂= Ρ₁-Α), shutter for small throw 9b
Select the stroke movement amount. Here, the value of α is
Entered in the table₁Is the step size of the
Specifically, one correction is performed with a step size. Thus, the ratio
Heavy ρ ₁Is corrected and the stroke movement amount is selected.
Then, the additional addition of powder and granules by the subsequent small-loading weighing box 9
The input amount Wr can be brought close to the set additional input amount Wc.
It

In the powdery or granular material filling apparatus 1 according to the present embodiment, while the drive shaft 4 makes one rotation, the powdery or granular materials are gradually filled into the containers shown in the steps of FIGS. 6 and 7. It is set to proceed (see FIG. 3).

As described above, according to the powder / granular material filling device 1 and the method of filling a powder / granular material into the container according to the present embodiment, highly accurate filling can be performed continuously in a short time. You can

The apparatus for filling powdery particles in the container according to the present invention is not limited to the above-mentioned embodiment. For example, instead of the rotary type powder / granular material continuous filling device 1 of the above-described embodiment, each step in the same device 1 is linearly expanded,
It is needless to say that so-called line type intermittent feed may be used, and in this case as well, the same operational effects as described above can be obtained.

The shape of the large-dispensing weighing box 8 is not limited to the rectangular shape in the above embodiment, and may be any of a cylindrical shape, an elliptical shape, a triangular shape and the like.

Further, the large-loading shutter 8b is not particularly limited as long as it has a function of charging powder particles into the container placed below, and a double-opening type, a sliding type or the like can be adopted. it can.

The shape of the small-dosing weighing box 9 and the driving mechanism of the small-dosing shutter 9b are not limited to those in the above embodiment, and the additional dosage of the powder or granules from the small-dosing weighing box 9 is not limited. Any one can be used as long as it can be quantitatively controlled. In addition, regarding the arrangement of the above-mentioned weighing container 8 and the above-mentioned small weighing device 9 on the turret board 6,
The arrangement is not limited to the radial arrangement in the above embodiment, but may be arranged in the circumferential direction (rotational direction).

It goes without saying that the method of filling the powdery or granular material according to the present invention in the container is not limited to the implementation by the powdery or granular material filling device 1 of the above-mentioned embodiment.

[0041]

EFFECTS OF THE INVENTION According to the method and apparatus for filling powdery particles in a container according to the present invention, the following effects can be obtained.
According to the method of filling a powdery or granular material into a container according to claim 1,
High-precision filling is possible.

According to the method of filling the powdery or granular material in the container according to the second aspect, in addition to the above effects, it is possible to perform the filling with higher accuracy.

According to the apparatus for filling a powder or granular material in a container described in claim 3, the above method for filling the powder or granular material can be suitably implemented.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of a device for filling a powder or granular material into a container according to the present invention.

FIG. 2 is an enlarged side sectional view of a main part of FIG.

FIG. 3 is a plan sectional view showing a filling step by the filling device of the above embodiment.

FIG. 4 is a time table showing a filling process performed by the filling device according to the embodiment.

FIG. 5 is a flow chart showing a procedure of a method of filling a powdery or granular material into a container according to the present invention.

FIG. 6 is a diagram showing a procedure for carrying out the method for filling powdery or granular material of the present invention into the container by the filling device of the above-mentioned embodiment, in which a is a diagram showing a state in which the powdery or granular material is filled in each weighing box. Sectional view, b
Is a cross-sectional view of a main part showing a state in which the volume measurement of powder and granules is completed,
FIG. 3C is a cross-sectional view of an essential part showing a state where large injection is performed.

FIG. 7 is a diagram showing a procedure for carrying out the method of filling the powdery or granular material of the present invention into the container by the filling device of the above-mentioned embodiment, in which a is a cross-sectional view of a main part showing a state in which large charging is completed, and b is an addition. FIG. 6 is a cross-sectional view of a main part showing a state of charging, and c is a cross-sectional view of the main part showing a state where the container is completely filled with the powder or granular material.

[Explanation of symbols]

 1 Powder / Filler Container Filling Device 5 Conveying Means 5a Load Cell Platform (Measuring Machine) 8 Large Loading Metering Box 80 First Charging Mechanism 9 Small Charging Metering Box 90 Second Charging Mechanism 10 Charging Means 11 Controller ( Control unit)

Claims (3)

[Claims] 1. A large-input measuring cell and a small-input measuring cell are respectively filled with powder and granules, the volume of the powder and granular material is measured, and then the powder and granular material in the large-input measuring cell is stored in a container. After the addition, the weight W ₁ of the powder or granules charged from the large-loading weighing box is measured, and the specific gravity ρ _{1 of the} powdery or granular material is measured based on the weight W ₁ and the volume V of the large-loading weighing cell. And calculate
A weight difference Wc between the set filling weight W and the weight W ₁ is calculated, and the powdery or granular material in the small dosing weighing cell is additionally charged into the container based on the weight difference Wc and the specific gravity ρ _1. A method for filling a powder or granular material into a container. 2. The specific gravity ρ ₁ is corrected based on the difference between the weight difference Wc and the actual weight Wr of the powder or granules additionally charged from the small charging metering box.
A method of filling the container with the described powder and granules. 3. A large dosing weighing box having a first dosing mechanism for throwing powdery or granular material into a container, and a small dosing measuring cell having a second dosing mechanism for additionally feeding the powdery or granular material into the container. A filling means for filling the large-loading weighing box and the small-loading weighing box with powder, and a transporting means for transporting the container equipped with a weighing instrument,
Of the weight W ₁ of the powder and granules charged from the large-loading weighing box, the specific gravity ρ ₁ of the powder and granules calculated from the volume V of the large-loading weighing box, and the set filling weight W and the weight W ₁ . And a controller for operating the second charging mechanism based on the weight difference Wc.