JP2806828B2 - Method and apparatus for filling powder and granular material into container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for filling a granular material into a container, for example, for filling a granular material such as a detergent, a bleaching agent, a bath agent, a medicine and the like.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open Nos. 54-113362 and 58-1 discloses conventional techniques relating to quantitative measurement of powders and granules.
One disclosed in Japanese Patent No. 40617 is known.

The "quantitative automatic weighing machine for powders and granules" disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 54-11362 discloses a large-volume weighing weighing weigher which weighs a large amount of powders and simultaneously weighs them. A small amount is continuously poured from a small hole while measuring the weight with a container, and when the amount is close to a predetermined amount, the small hole is closed to complete the filling.

[0004] Further, the "automatic weighing method of powders and granules" disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 58-140617 discloses a method of weighing a large input amount and batching a shortage from a set value in small input weighing units. This is a method of refilling by filling.

[0005]

However, in the above-mentioned "automatic weighing machine for powders and granules", small input of powders and granules is caused by outflow from small holes.
The diameter of the hole must be small compared to the size of the large inlet. However, if the shape of the hole is reduced in this way, the flow rate will be reduced and the time required for small dosing will have to be long, and since there is only one point to end small dosing, fluctuations and changes in fluidity will occur. However, there is a limit to improving the filling accuracy in the case where the problem occurs.

[0006] Further, the above-mentioned "method of automatically weighing powder and granules"
Small input of powder and granules is based on batch processing in which a large number of measuring boxes of the same capacity are arranged, and the step size of the filling amount due to small input is determined by the capacity of the measuring box. There was a limit. Moreover, since the weight of the granular material entering the small input measuring box is not measured, when the specific gravity of the granular material changes due to the water content of the granular material, etc., the powder enters the small input measuring box. Since the weight of the powder changes, even if the same amount is filled with respect to the required amount, the actual filling amount varies, and the filling accuracy has to be reduced.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method and an apparatus for filling a granular material into a container which can efficiently perform high-precision filling.

[0008]

The invention according to claim 1 of the present invention fills a measuring box with powders and granules, and then, after the powders in the measuring box are largely poured into a container, The above-mentioned powder and granules are additionally charged with the amount of the powder and granules charged per unit time being substantially constant, and the additional charge is linearly approximated with respect to time, and additional charging is performed based on the approximate straight line and the set filling weight. The object has been attained by providing a method of filling a granular material into a container, which is characterized by stopping.

According to a second aspect of the present invention, there is provided an apparatus suitable for use in carrying out the method of filling a granular material into a container according to the present invention. Filling means for filling the powder into the container, charging means for charging the granular material filled in the measuring box into the container, transport means for transporting the container with a measuring device, and additional charging time. And a control unit for activating the charging means based on the approximate straight line and the set filling weight.

[0010]

According to the method for filling a granular material into a container according to the first aspect of the present invention, the granular material is filled in a measuring box, and then the granular material in the measuring box is poured into a container. After that, the amount of the granular material per unit time is substantially constant, the granular material is additionally charged, and the additional charged amount is linearly approximated with respect to time and based on the approximate straight line and the set filling weight. Since the additional charging is stopped, the filling accuracy of the granular material into the container is improved.

According to a second aspect of the present invention, there is provided an apparatus for filling a granular material into a container, wherein the granular material is filled by the filling means into the measuring cell conveyed by the conveying means, and The powder and granules filled in the container are largely and additionally charged into the container by the charging means. Then, the additional charging amount is linearly approximated with respect to time by the control unit, and the additional charging means is operated based on the approximated straight line and the set charging weight to stop the additional charging. The powder is filled with high accuracy.

[0012]

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

FIGS. 1 to 3 show a rotary-type powder-particle continuous filling apparatus which is an embodiment of the powder-particle filling apparatus according to the present invention. In the figure, reference numeral 1 denotes a rotary-type powder-particle continuous filling apparatus (hereinafter, referred to as "powder-particle filling apparatus"), and C denotes a container.

As shown in FIG. 1, the powder and particle filling apparatus 1 includes a motor 3 having a reduction unit mounted in a frame main body 2 and a drive that rotates about a vertical axis via a bevel gear by the motor 3. A shaft 4, a turntable (transporting means) 5 inserted and fixed to the drive shaft 4, a cylinder base 6 inserted and fixed to the drive shaft 4 above the turntable 5, and a cylinder base 6 And a turret board 7 inserted and fixed to the drive shaft 4 above the drive shaft 4. A slip ring 40 is attached to the upper end of the drive shaft 4 so that power can be supplied to a sequencer 9 described later without any trouble.

On the turntable 5, the load cell table (measuring device) 50 is disposed. The load cell (not shown) of the load cell table 50 is converted into a weight to convert the amount of strain into a container being transported. You can measure the weight of The output of the load cell table 50 is amplified by a load cell amplifier 51 and then input to a sequencer (control unit) 9 described later.
In addition, the filling amount of the granular material filled in the container C can be sequentially monitored. The turntable 5 has a supply starwheel 52 for supplying the container C to the turntable 5 and a discharge starwheel 53 for discharging the container C from the turntable 5.
Are arranged adjacent to each other (see FIG. 5).

On the cylinder base 6, an electric piston-cylinder mechanism (charging means) 60 is provided. The electric piston / cylinder mechanism 60 includes a servomotor 61 and a rod 62 operated by the servomotor 61. The servomotor 61 is controlled by a sequencer 9 described below via a motor driver 63, and a weighing device described later is measured. Shutter 81 of Masu 8
Is controlled by controlling the opening and closing of the powder. Further, a cylindrical guide 64 is provided on the peripheral portion of the cylinder base 6 so as to enhance the airtightness between the shutter 81 and the container C so as to suppress the fluttering of the granular material at the time of large injection. There is something. The guide 64 is provided with a window 64a so that the shutter 81 can move back and forth.

The turret board 7 is provided with an upright wall section 71 which is provided on the outer peripheral end of a circular board section 70 in plan view. In addition, a hole 72 for a measuring box 8 described later is formed in the board section 70, and the measuring box 8 is filled with the powdery material through the hole 72.

Above the turret board 7, a powder supply cylinder 73 for supplying the powder to the turret board 7 is supported by the frame body 2. The board 70
The semi-circular guides 74 and 75
Are supported and fixed by the frame body 2 via a support member (not shown), and the powder supplied by the powder supply cylinder 73 is kept within a predetermined range on the board 70 by the guide 74. With the rotation of the turret board 7, the upper surface of the granular material filled in the measuring box 8 is flushed with the surface of the board section 70, and the guide 75
The powder is brought closer to the periphery of the board 70. Here, the turret board 7, the powder supply tube 73,
The guides 74 and 75 constitute the input means 76.

On the turret board 7, a measuring box 8 is inserted. The measuring box 8 includes a cylindrical sleeve 80 serving as a body and a shutter 81 serving as a bottom. The shutter 81 is connected to the rod 62 of the electric piston / cylinder mechanism 60, and reciprocates with the rod 62 moving forward and backward.
The lower end opening can be opened and closed.

A sequencer 9 is mounted substantially at the center of the turret board 7. This sequencer 9
The filling amount of the granular material in the container C based on the output from the load cell table 50 is monitored.
An operation command is issued to the servomotor 61 of the electric piston-cylinder mechanism 60 so as to close the shutter 81 based on the output of.

The operation command of the servo motor 61 by the sequencer 9 based on the output of the load cell table 50 is issued as shown in FIG. That is, first, the shutter 81 of the measuring cell 8 is moved to open the lower end of the measuring cell 8, and the powder in the measuring cell 8 is thrown in by about 70% of the set filling amount W. Next, after the large throw-in, the opening amount of the measuring box 8 by the shutter 81 is narrowed, and the throw-in amount per unit time W ′ is made substantially constant, and the granular material is additionally thrown in. And
From the real-time output of the load cell table 50, the additional charging amount is linearly approximated with respect to time, and a filling completion time T due to additional charging is calculated based on the approximate straight line L and the set charging amount W.
Is processed. Then, the shutter 81 is closed and the additional charging is stopped at a time T ′ obtained by subtracting the time t at which the granular material to be additionally charged reaches the container C from the measuring box 8 from the filling completion time T, and the additional charging is stopped. The powder of the set filling amount W is filled. Here, the section (time) A in which the additional injection amount is linearly approximated with respect to time is 0.2 seconds to 1.0 seconds, and preferably 0.5 seconds to 0.6 seconds.

Next, the procedure of the method for filling the granular material into the container according to the present invention will be described with reference to the time chart shown in FIG. 4 and FIGS. I will explain while. In the following description, one measuring box 8 will be described. The unit of the numerical value in FIG. 4 is seconds.

First, empty containers C are transferred to the conveyor 10
It is conveyed by the zero and pitch adjusting device 101 and is mounted on the load cell table 50 of the turntable 5 by the supply star wheel 52. And the load cell table 50
When the container C is placed thereon, monitoring of the measured value of the load cell table 50 by the sequencer 9 is started in 0.2 seconds. Above that, the weighing box 8 is filled with powder and granules as needed (FIGS. 4, 5 and 6 (a)).
reference).

Next, after the container C is placed on the load cell table 50, the servomotor 61 is operated by the operation command from the sequencer 9 and the shutter 81 moves to open the lower end of the measuring box 8 for one second. Become. Approximately 70% of the set filling W among the granular material filled in the measuring box 8 is largely poured into the container C (FIGS. 4, 5 and 6B).
reference).

After the end of the large throw, the shutter 81 is moved by an operation command from the sequencer 9 and the open state of the measuring box 8 is narrowed. In 0.5 seconds during this time, the vibration of the load cell table 50 is stabilized, and the powder on the measuring cell 8 is cut off by the guide 74, Supply is also regulated.
Then, the input amount of the granular material per unit time is made substantially constant, and the additional granular material is added for 1.5 seconds. In the meantime, in the sequencer 9, the additional charging amount based on the real-time output of the load cell table 50 is linearly approximated with respect to time, and the filling by additional charging is completed based on the approximate straight line L and the set charging amount W. Is calculated. Then, the shutter 81 is closed and the additional charging is stopped at a time T ′ obtained by subtracting the time t at which the powder and granular material to be additionally charged reaches the container C from the measuring box 8 from the time T until the filling is completed. Is filled with a granular material having a set filling amount W (see FIGS. 4, 5 and 6 (d) and 6 (e)).

After the predetermined additional charging of the granular material is completed,
The container C is guided to the carry-out conveyor 102 by the discharge star wheel 53, and is transferred to a subsequent process such as a packaging process (see FIGS. 5 and 6 (f)).

As described above, according to the granular material filling apparatus 1 of the present embodiment and the method of filling the granular material into the container using the same, highly accurate filling can be performed continuously in a short time. Can be.

In addition, the above-mentioned granular material filling apparatus 1 is provided with a shutter 81 by an electric piston / cylinder mechanism 60.
Opening and closing, and the large opening and additional closing are performed by the shutter 81, so that the opening and closing operation can be performed with higher accuracy than the conventional opening and closing with the damper, and the structure of the measuring box is simplified as compared with the conventional case. can do.

It should be noted that the apparatus for filling a container with powder or granules according to the present invention is not limited to the above embodiment. For example, in place of the rotary type granular material continuous filling apparatus 1 of the above embodiment, each step in the same apparatus 1 was developed linearly.
A so-called line type intermittent feed may be used, and in this case, it is needless to say that the same operation and effect can be obtained.

The shape of the measuring box is not limited to the cylindrical shape in the above embodiment, but may be any of an elliptic cylindrical shape, a rectangular cylindrical shape, a triangular cylindrical shape, and the like.

The shutter 81 is not particularly limited as long as it has a function of charging the granular material into the container C placed below. The shutter 81 may have a stroke amount such as a double-pull type or a three-way pull type. Any shutter can be used as long as it can control the input amount.

Needless to say, the method of filling the powdery material into the container according to the present invention is not limited to the method using the powdery material filling apparatus 1 of the above embodiment.

[0033]

According to the method and the apparatus for filling a granular material into a container according to the present invention, the following effects can be obtained.
According to the method for filling a granular material into a container according to claim 1,
High-precision filling can be performed efficiently.

According to the apparatus for filling a granular material into a container according to the second aspect, the method for filling the granular material can be suitably performed.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing one embodiment of an apparatus for filling a 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 diagram showing a relationship between a filling amount of a granular material based on an output of a load cell table in the filling device of the embodiment and time.

FIG. 4 is a time table showing a filling step in one embodiment of a method for filling a granular material into a container according to the present invention.

FIG. 5 is a cross-sectional plan view of a main part showing a step of filling a granular material into a container by the filling apparatus of the above embodiment.

FIG. 6 is a view showing a procedure of a method for filling a powdery or granular material into a container according to the present invention by the filling device of the above embodiment, and FIG. Sectional view,
(B) is a cross-sectional view of a main part showing a state in which a large input is performed,
(C) is a cross-sectional view of a main part showing a connection state (stabilized state) between the large injection and the additional injection, (d) is a cross-sectional view of a main part showing a state where the additional injection is performed, and (e) is an additional injection. (F) is a main part cross-sectional view showing a state in which the granular material is filled in the measuring box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filling apparatus of a granular material into a container 5 Transport means 50 Load cell stand (weighing device) 60 Electric piston-cylinder mechanism (feeding means) 76 Filling means 8 Measuring box 9 Sequencer (control unit)

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yasuhiro Honma 2-1-3 Bunka, Sumida-ku, Tokyo Kao Co., Ltd. Research Institute (72) Inventor Satoru Sugai 2-1-3 Bunka, Sumida-ku, Tokyo Kao Co., Ltd. Research In-house (58) Field surveyed (Int.Cl. ⁶ , DB name) B65B 1/30-1/42

Claims (2)

(57) [Claims] 1. A method according to claim 1, further comprising: charging the granular material in the measuring box, and then largely charging the granular material in the measuring box into a container; A method of filling a container with powder and granules, wherein the powder and granules are additionally charged, and the additional charging amount is linearly approximated with respect to time and the additional charging is stopped based on the approximate straight line and the set filling weight. . 2. A measuring box for filling powder and granules, filling means for filling the measuring box with powder, charging means for charging the powder and granules filled in the measuring box into a container, Transport means for transporting the container with a container, and a control unit for linearly approximating the additional charging amount with respect to time and operating the charging means based on the approximate straight line and the set filling weight. For filling powdery and granular materials into containers.