JP3306525B2 - Device for measuring substances such as powder and liquid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring substances such as powders and liquids used in a wide range of fields such as pharmaceuticals, foodstuffs and chemicals at a high speed and with high accuracy.

[0002]

2. Description of the Related Art Conventionally, when measuring substances such as powders and liquids, the substances have been measured while being charged into containers such as bags, boxes and cans. However, in such a weighing method, substances must be taken in and out until the set value is reached,
It took time and the weighing accuracy was not sufficient.

Therefore, for example, a measuring device disclosed in Japanese Patent Publication No. 33-9191 is provided as a device for measuring powder at a high speed. This apparatus supplies most of the set value, for example, 90% of the fixed amount, from the first feeder 1 to the weighing hopper 2 at a high speed in a short time, and throws an object to be weighed from the hopper 2 into another hopper 8. Next, the first feeder 7
The remaining 10% up to the fixed amount is supplied to the hopper 8 within a range smaller than the feeder 1 supply amount.

[0004]

In the above-described apparatus, the weighing and supply of the objects to be weighed are divided into two stages, and the weighing and supply are performed in a short time. Since the weighing was performed with the weights 4 and 10, the weighing accuracy was not high. Also,
The first hopper 1 is rotatable and has two storage portions formed in a vertical relationship. When the object supplied to the upper storage portion reaches a fixed amount (90%), the first hopper 1 rotates. Although the object to be weighed is put into the hopper 8, the object to be weighed may be scattered when the hopper 1 rotates. In addition, hopper 1
Is stopped when the convex portion 6 protruding from the hopper 1 abuts against the stopper 5, but the mechanical shock is large.

[0005] An improved version of the above device is disclosed in
There is a measuring device of No.-22566, but in this case,
Two weighing machines are required to weigh one type of weighing object,
The whole apparatus was enlarged. In addition, in each of the above devices, when weighing various types of powders of different qualities, a weighing device for each type is required, which also increases the size of the device.

In view of the above-mentioned problems of the conventional apparatus, the present invention provides high-speed and high-precision measurement of substances such as powders and liquids (hereinafter simply referred to as "substances") by two-stage measurement and two-stage supply. An object of the present invention is to provide a metering device capable of supplying a substance. Further, the present invention provides a weighing device capable of weighing with one weighing device when supplying various kinds of substances having different content components to one container.

[0007]

In order to achieve the above object, the present invention provides an apparatus for opening and closing a storage tank 1 capable of discharging a powder material contained therein and a container 9 capable of being measured by a measuring device 10. The intermediate receiving tank 6 having the valve 7 is installed independently, and most of the total set amount to the container 9 is supplied from the storage tank 1 to the intermediate receiving tank 6 by time control, and the substance to be stored in the intermediate receiving tank 6 is supplied. After being supplied to the container 9, the remaining amount of the total set amount of the substance can be directly supplied from the storage tank 1 to the container 9 by weight control, and the storage tank 1 capable of discharging the powder material to be stored is provided. A plurality of measuring devices each including an intermediate receiving tank 6 having an opening / closing valve 7 are installed, and each storage tank 1 contains a powder having a different content component. Placed on a movable carriage 12 between the weighing devices, from the storage tank 1 After the majority of the total set value to the container 9 is supplied to the intermediate receiving tank 6 by time control, and the substance to be accommodated in the intermediate receiving tank 6 is supplied to the container 9, the remaining substance of the total set value is weighed. It is possible to supply directly from the storage tank 1 to the container 9 by control.

[0008] The storage tank 1 is provided with a single screw conveyor 2 which can cut out and discharge the powder to be stored in the lower part. The storage tank 1 is provided with a plurality of screw conveyors 2 including a large-capacity discharge conveyor and a small-capacity discharge conveyor capable of cutting out and discharging the powder to be stored, in a lower part thereof.

Further, in the apparatus of the present invention, an intermediate receiving tank 6 having an on-off valve 7 is independently installed between a storage tank 1 capable of discharging a contained liquid substance and a container 9 which can be measured by a measuring device 10. At the same time, a pump 13 and a liquid supply valve 14 are installed between the storage tank 1 and the intermediate receiving tank 6, and most of the total set value to the container 9 is supplied from the storage tank 1 to the intermediate receiving tank 6 by time control. Together with the substance contained in the intermediate receiving tank 6
After being supplied to the container, the remaining amount of the total set amount can be directly supplied from the storage tank 1 to the container 9 by weight control.
Further, it has a storage tank 1 capable of discharging the contained liquid substance and an intermediate receiving tank 6 having an on-off valve 7, and a pump 13 and a liquid supply valve 14 are installed between the storing tank 1 and the intermediate receiving tank 6. A plurality of weighing devices are installed, each storage tank 1 contains a liquid having a different content component, and a weighing device 10 on which a container 9 is placed is fixed on a carriage 12 movable between the weighing devices. After supplying the majority of the total set value to the container 9 from the storage tank 1 to the intermediate receiving tank 6 by time control, and supplying the substance contained in the intermediate receiving tank 6 to the container 9, the remaining amount of the total set value is The quantity of substance is transferred from storage tank 1 to container 9 by weight control.
Available directly.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an embodiment in a case where powder among substances such as powder and liquid is measured. In the figure, reference numeral 1 denotes a storage tank for storing powder, and a known screw conveyor 2 is installed in a lower portion of the storage tank 1. The screw conveyor 2 is a single unit in which a screw blade 4 is spirally attached to a single screw shaft 3. The screw conveyor 3 is driven by a motor M, and the screw blade 4 is rotated together with the screw shaft 3. The substance contained in the hopper 1 is cut out and discharged from the powder discharge port 5.

An intermediate receiving tank 6 is provided in a hollow portion of the storage tank 1 below the powder outlet 5. The intermediate receiving tank supported by a suitable supporting girder material (not shown) temporarily receives most (80-90%) of the total set amount of powder. An opening / closing valve 7 is provided below the intermediate receiving tank 6. The opening / closing valve 7 is operated by an opening / closing cylinder 8 connected to the side.

A container 9 such as a bag, a box, and a can is provided below the intermediate receiving tank 6, and the container 9 is detachably suspended from a measuring instrument 10 installed in a hollow space. When the shape of the container 9 can be specified as a cylindrical or rectangular box or can, a flange is formed on the outer periphery of the upper edge of the container 9, and the flange is attached to an appropriate receiving member suspended from the measuring device 10. Just hook it. When the shape of the container 9 cannot be specified like a bag, the upper end edge of the opening of the bag may be gripped by a receiving member, for example, a chuck.

Regardless of the shape of the container 9, any container may be used as long as it can be hung and connected to the measuring device 10 below the intermediate receiving tank 6, can be measured in that state, and can be easily attached and detached.
Although the intermediate receiving tank 6 is located between the container 9 and the measuring device 10 in the drawing, there is no connection between the two, and the weight of the intermediate receiving tank 6 itself and the weight of the powder supplied therein. Do not affect the scale 10.

Next, the powder is placed in a container 9 using the above apparatus.
An operation state in which the total set value is supplied to the controller will be described. The motor M, the opening / closing cylinder 8 and the measuring device 10 can be automatically controlled by the control device 11. Therefore, the rotation speed and rotation time of the screw conveyor 2 when cutting out the powder from the storage tank 1 are regulated, and the set supply amount is supplied to the intermediate receiving tank 6.

For example, the supply amount to the intermediate receiving tank 6 is
When 90% of the total set value supplied to the intermediate receiving tank 6 is set, the motor M is driven by time control to supply 90% of the powder into the intermediate receiving tank 6 in a short time. When the supply of the set amount is completed, the drive of the motor M is stopped, the control device 11 operates the opening / closing cylinder 8 to open the opening / closing valve 7, and the powder in the intermediate receiving tank 6 is charged into the container 9 by gravity. You.

When the charging of the powder from the intermediate receiving tank 6 is completed, the measuring device 10 measures the substantial amount of the powder in the container 9, the motor M is driven again, and the rotational speed of the screw conveyor 2 is controlled by the control device 11. The powder is directly charged into the container 9 from the storage tank 1 through the intermediate receiving tank 6 while controlling. Therefore, the on-off valve 7 remains open. Since the weight of the container 9 is input to the control device 11 in advance, the weight of the charged powder and the weight of the container 9 are distinguished.

Since the input amount is measured by the measuring device 10, when the input amount reaches the remaining portion (10%) of the total set value, the motor M stops and the supply of the powder is stopped. At this point, the on-off valve 7 is closed and the container 9 is removed from the receiving member of the measuring device 10 and transferred to another place for storage or processing.

The container 9 into which the total set amount has been loaded as described above is removed and transferred, and before the new empty container 9 is set on the measuring device 10, the screw conveyor 2 is moved by the motor M in the same manner as described above. By rotating, the required supply amount (90%) is supplied to the intermediate receiving tank 6 in advance. Thereafter, the powder having the set value is charged into the container 9 by the same operation as described above. By repeating the above operation, a required amount of powder is supplied to all the containers 9.

FIG. 2 shows another embodiment in which powder is weighed in the apparatus of the present invention. In this embodiment, the weighing device 10 is fixed on the ground or on a suitable table so that the container 9 can be placed thereon. Is the same as With such a configuration, the structure of the measuring instrument 10 is simplified, and the installation and removal of the container 9 is facilitated.

FIG. 3 shows a state in which the amount of powder input is controlled by time control and weight control using the above-described apparatus. It can be seen that the remaining powder is supplied to the container 9 by controlling the weight of the measuring device 10.

FIG. 4 shows another embodiment of the storage tank 1. In each of the above embodiments, the powder is discharged and supplied by one screw conveyor 2, but in this embodiment, the two screw conveyors 2 having different discharge amounts are used.
a, 2b are used. Conveyor 2
a is for large-capacity discharge having screw blades 4 having a large pitch and a diameter, and the conveyor 2b is for small-capacity discharge having screw blades 4 having a small pitch and a diameter.

The screw conveyor 2 in the present embodiment has the above-described structure, so that the storage tank 1 to the intermediate receiving tank 6
If the powder is discharged to the conveyor using the large-capacity conveyor 2a, the required amount can be supplied within the total set value in a shorter time. In addition, if the supply of the remaining amount from the storage tank 1 to the container 9 is performed by the small-capacity conveyor 2b, the small amount can be discharged, and the accuracy of the measured value can be improved. Although the case of two screws has been described, three or more screw conveyors 2 having different discharge amounts may be used.

FIG. 5 shows still another embodiment using the apparatus shown in the above embodiment. In the second embodiment, the measuring device 10 is in a stationary state, and the container 9 is placed thereon. In the present embodiment, a plurality of weighing devices each including the storage tank 1 and the intermediate receiving tank 6 are installed, and a weighing device 10 on which the container 9 can be placed is fixed on a carriage 12 so as to be movable. The tank 1 is characterized by storing powders having different contents components.

Although three weighing devices are shown in the drawing,
The number of weighing devices is determined according to the type of powder. The movement and stop of the carriage 12 can be performed by the control device 11, and by moving the container 9 between the respective measuring devices, the powder having different content components is supplied from the respective measuring devices in required amounts. . The operation of supplying the powder, the setting of the supply amount, and the like are exactly the same as those in the above embodiment.

As shown in the figure, three weighing devices are installed and three
When supplying different kinds of powder to the container 9, for example, the supply amount from the first measuring device A is set to a total set value amount (100%).
30%, the supply amount from the second measurement device B is 40%, and the supply amount from the third measurement device C is 30%.

First, 90% of the total set amount (30%) of the first measuring device A is charged from the storage tank 1 to the intermediate receiving tank 6 in advance. Similarly, 90% of the total set amount of the powder is charged into the intermediate receiving tank 6 in the other measuring devices B and C in the same manner. When the container 9 is moved by the carriage 12 and arrives below the intermediate receiving tank 6 of the first weighing device A,
The on-off valve 7 is opened and the powder in the intermediate receiving tank 6 is charged into the container 9, and then 10% of the remaining amount is charged into the container 9 with the on-off valve 7 open.

After the supply of the required amount of powder is completed by the first measuring device A, the container 9 is moved, and the powder in the intermediate receiving tank 6 is also transferred to the container 9 by the second and third measuring devices B and C. It is sufficient to input the remaining amount together with the input. By moving the container 9 between the measuring devices A → B → C as described above, different types of powder can be supplied according to the respective input amounts, and finally the container 9 is set to the total setting. A value amount of powder will be supplied.

The measuring time when three different powders are measured is the sum of the moving time of the carriage 12 and the supply time of about 10% of the total set value by the above-described method. The supply time can be significantly reduced as compared with the supply time of 100% of the value.

In each of the above embodiments, the case where powder is used as the substance is described. The substance to be measured in the measuring device of the present invention is not limited to the powder, and the liquid can be supplied and measured at a high speed and with high accuracy. FIG. 6 shows an embodiment in which a liquid is measured as a substance. In the figure, a pump 13 and a liquid supply valve 14 are provided between the liquid storage tank 1 and the intermediate receiving tank 6, and the other parts are the same as those in the case of the powder measurement. I have.

The liquid stored in the storage tank 1 is sucked by the pump 13, passes through the channel pipe, and is supplied to the intermediate receiving tank 6 via the supply valve 14. This is done by controlling. For example, 90% of the total set value amount (100%) to the container 9 is supplied to the intermediate receiving tank 6. After the container 9 is set on the measuring device 10, the on-off valve 7 is opened so that 90%
Amount of liquid is supplied to the container 9 collectively. Thereafter, the remaining amount (10%) of the liquid may be supplied from the supply valve 14 into the container 9 by weight control by the measuring device 10 through the intermediate receiving tank 6 with the on-off valve 7 opened.

The operation of supplying the liquid by the time control and the weight control described above is exactly the same as the case of the powder. Therefore, in the case of a liquid as well, if a plurality of weighing devices are installed and the container 9 is movable between the weighing devices, liquids having different contents can be supplied from the respective weighing devices in required amounts.

[0032]

As described above, according to the present invention described above, it is possible to supply the required amount of the tank set value to the container by the time control and the metering control for the substance composed of the powder or the liquid. Therefore, the intermediate receiving tank 6 having the on-off valve 7 is independently installed between the storage tank 1 and the container 9 that can be measured by the measuring device 10, and the total receiving value of the container 9 is set in the intermediate receiving tank 6. Most of the amount can be supplied from the storage tank 1 by time control.

After the container 9 is set on the measuring device 10, the on-off valve 7 is opened to supply the substance to the container 9, and then the on-off valve 7 is opened.
The remaining amount of the substance may be directly discharged and supplied from the storage tank 1 to the container 9 in a state where is opened. The intermediate receiving tank 6 is located between the storage tank 1 and the container 9, and the container 9 is located immediately below the intermediate receiving tank 6, so that the substance can be supplied without being scattered around.

After the supply of the total set amount of the substance to the container 9 is completed, if the required amount of the substance is supplied to the intermediate receiving tank 6, the container 9 filled with the substance is removed from the measuring device 10.
When a new empty container 9 is installed in the measuring device 10, a required amount of compartments can be immediately supplied to the container 9 by opening the on-off valve 7, so that the material can be supplied at a high speed.

The intermediate receiving tank 6 is supplied in advance with the majority of the total set value from the storage tank 1, and the supply of the remaining substance to the container 9 is performed by weight control by the measuring device 10. In addition, the supply amount of the powder to the container 9 can be performed with high accuracy.

If the screw conveyor 2 for cutting out the powder in the storage tank 1 in the powder measurement is constituted by two conveyors 2a and 2b for discharging large capacity and discharging small capacity, the conveyor 2a for discharging large capacity is used. Intermediate receiving tank 6 by using
Can supply the required amount (most amount) of the total set value amount in a shorter time. In addition, the use of the small-capacity discharge conveyor 2b makes it possible to adjust the discharge amount by a small amount.
By performing the weight control by zero, it is possible to supply with high accuracy.

Further, if the measuring device 10 on which the container 9 can be placed is placed on the carriage 12 so as to be movable between a plurality of measuring devices, each of the storage tanks 1 containing substances having different contents can be obtained.
Can supply a required amount of each substance into the container 9, and can supply a plurality of kinds of substances by set value amounts.

The supply and stop of the substance from the storage tank 1 to the intermediate receiving tank 6 or the container 9 and the measurement and the like by the measuring device 10 are controlled by a single control device 11 so that the driving and stopping of each section are performed in an interlocked manner. This makes it possible to efficiently supply powder.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of a powder measuring device of the present invention.

FIG. 2 is a front view showing another embodiment of the powder measuring device of the present invention.

FIG. 3 is a graph showing a supply amount of powder in each embodiment.

FIG. 4 is a front view showing another embodiment of the hopper.

FIG. 5 is a front view of an apparatus capable of supplying a plurality of types of powder.

FIG. 6 is a front view of a liquid supply and measurement device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hopper 2 Screw conveyor 3 Screw shaft 4 Screw blade 5 Discharge port 6 Intermediate receiving tank 7 Opening / closing valve 8 Opening / closing cylinder 9 Container 10 Measurer 11 Controller 12 Truck 13 Pump 14 Liquid supply valve

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01G 13/04 G01G 17/06 G01G 19/38

Claims (6)

(57) [Claims] 1. A storage tank 1 capable of discharging a powder material to be contained.
And an intermediate receiving tank 6 having an on-off valve 7 between the measuring vessel 10 and the container 9 that can be measured by the measuring instrument 10. The intermediate receiving tank 6 from the storage tank 1 to the intermediate receiving tank 6 has most of the total set value for the container 9. After supplying the amount by time control and supplying the substance contained in the intermediate receiving tank 6 to the container 9, the remaining amount of the total set amount can be directly supplied from the storage tank 1 to the container 9 by weight control. An apparatus for measuring a powdery substance, comprising: 2. A storage tank 1 capable of discharging a powder material contained therein.
And an intermediate receiving tank 6 having an on-off valve 7 are provided with a plurality of measuring devices, and each storage tank 1 contains a powder having a different content component, and a measuring instrument 1 on which a container 9 is placed.
Numeral 0 is fixed on a trolley 12 movable between the respective weighing devices. The storage tank 1 supplies most of the total set value to the container 9 from the storage tank 1 to the intermediate receiving tank 6 by time control and accommodates it in the intermediate receiving tank 6. A powdery substance measuring device, characterized in that after supplying the substance to the container 9, the remaining amount of the total set amount can be directly supplied from the storage tank 1 to the container 9 by weight control. 3. The powder substance metering device according to claim 1, wherein the storage tank 1 is provided with a single screw conveyor 2 at a lower portion capable of cutting out and discharging the powder to be stored. 4. The storage tank 1 is provided with a plurality of screw conveyors 2 including a large-capacity discharge conveyor and a small-capacity discharge conveyor, which are capable of cutting out and discharging the powder to be accommodated, in a lower part thereof. Item 4. The powder substance measuring device according to Item 1 or 2. 5. A storage tank 1 capable of discharging a contained liquid substance.
And an intermediate receiving tank 6 having an on-off valve 7 between the storage tank 1 and the intermediate receiving tank 6, and a pump 13 and a liquid supply valve 1 between the storing tank 1 and the intermediate receiving tank 6.
4 is installed, and the majority of the total set value to the container 9 is supplied from the storage tank 1 to the intermediate receiving tank 6 by time control, and at the same time, the substance to be stored in the intermediate receiving tank 6 is supplied to the container 9 and the total setting is performed. An apparatus for measuring a liquid substance, characterized in that a residual substance of a value amount can be directly supplied from the storage tank 1 to the container 9 by weight control. 6. A storage tank 1 capable of discharging a contained liquid substance.
And an intermediate receiving tank 6 having an opening / closing valve 7, a plurality of measuring devices in which a pump 13 and a liquid supply valve 14 are installed between the storage tank 1 and the intermediate receiving tank 6 are installed. Is a weighing machine 10 that accommodates liquids having different contents and mounts a container 9 on a trolley 1 that can move between the weighing devices.
2 and supplies the majority of the total set value to the container 9 from the storage tank 1 to the intermediate receiving tank 6 by time control, and supplies the substance contained in the intermediate receiving tank 6 to the container 9, An apparatus for measuring a liquid substance, characterized in that the remaining substance of a set amount can be directly supplied from the storage tank 1 to the container 9 by weight control.