JP2549988B2 - Liquid metering device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is mainly applied to liquid raw materials having a wide viscosity range from low viscosity to high viscosity in a laboratory, such as dye solutions, paints, color pastes for printing, printing inks, oils and fats, surface active agents and adhesives. The present invention relates to a small amount of liquid such as an agent, a device for performing precise weighing and mixing.

[0002]

2. Description of the Related Art Generally, in a laboratory that handles many kinds of liquid raw materials, a device called a dispenser is widely used as a device for quantitatively collecting the liquid raw materials. This type of device is a combination of a container containing each liquid material, a glass cylinder, a metering pump consisting of a piston and a check valve, and the stroke of the piston in the cylinder of the pump corresponding to the amount of liquid to be collected. The width is set, and the piston is manually operated with this stroke width to suck and discharge a required amount of liquid to collect the liquid.
In addition, a large number of dispensers are arranged in one device, and the devices that perform computer control to arbitrarily select components from various kinds of liquid raw materials and sequentially collect and mix the required amounts are the field of color matching test in the dyeing industry. Is widely used in. Japanese Patent Laid-Open Publication No. 55-12
2068 Sho 55-138577 and the like.

In Japanese Patent Laid-Open No. 55-122068, solutions of different kinds of dyes are contained in individual bottles, the dispenser is independently connected to each bottle by a thin pipe, and one piston driving device is moved, It is connected to a dispenser connected to a bottle in which the product to be sampled is stored, and drives the piston to collect the sample. The discharge port of the dispenser is centrally attached to the upper part of the port of a collection container (beaker, dyeing pot, etc.), and a solution of any kind of dye is selected and injected. According to Sho 55-138577, the raw material liquid is stored in a beaker, transferred to a sampling position by a turntable, the suction pipe part of a commonly used dispenser is inserted into the beaker, and a piston actuator is used. The piston is driven by the stroke width corresponding to the amount of the sampled liquid to collect the sampled liquid.After the sampled liquid is collected, the suction pipe is inserted into the water tank, the discharge port is located at the drainage part, and the piston is driven to clean the inside of the dispenser. (Washing), dehydration after washing, and transfer to the next sample liquid collection. In addition to these, dye solutions of individual varieties are stored in independent bottles, piping for discharging by the action of a siphon is provided, and a solenoid valve that interrupts the liquid flow is installed in the middle of the piping and installed on the electronic balance. There is also an apparatus of a system in which the solenoid valve is opened to discharge the dye solution while weighing the weight collected in the collection container, and the solenoid valve is closed when a predetermined weight is reached to collect the solution. in use.
However, these devices can only be used for low-viscosity liquids such as aqueous solutions of dyes, and since thin pipes are used for sampling and sending liquids, the applicable liquid viscosity range is limited. It was The types of liquid raw materials that can be used are also limited by the space at the bottle stock location in the equipment.

For high-viscosity liquids, a high-viscosity dispenser of the type in which a pump is connected to a liquid container by a thick pipe is used for mixing paints, inks, adhesives and the like. In this case, since the pipe is thickened and the pump is enlarged in order to cope with the flow resistance in the pipe, the entire device is enlarged and it is not suitable for precision measurement of many kinds of small amounts, and the structure is complicated, and the liquid raw material is complicated. Since it is not possible to easily switch between different types of liquid raw materials, it is not suitable for the purpose of the laboratory to precisely select and mix small amounts of liquid raw materials by freely selecting any kind of liquid raw material from multiple types of liquid raw materials. was there. Therefore, this type of device is mainly for field use, and even if it is used in a laboratory, it is only used for measuring and sampling liquid raw materials of a few types.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is to realize a small amount of liquid raw materials of various kinds having a wide viscosity range from low viscosity to high viscosity, which cannot be realized by the conventional apparatus. An object of the present invention is to provide a new type liquid metering and sampling device that can accurately perform volume sampling and can easily support product type switching.

[0006]

In order to achieve the object of the present invention, a method of directly mounting a small-diameter cylinder / piston type pump vertically at the bottom of each liquid container is adopted. This pump is provided with a check valve (A) which allows liquid to pass only in the downward direction in the vicinity of the connection with the liquid container, and a discharge nozzle is provided at the lower end of the cylinder. The cylinder is made of non-magnetic material and the piston is made of ferromagnetic material, so that the piston can freely move in the cylinder by the induction of the magnetic force from the outside without using the direct mechanical action from the outside. To do. Inside the piston, a conduit that serves as a passage for the liquid is penetrated. The conduit has a diameter as large as possible and the length of the conduit portion is shortened as much as possible so that the resistance against the passage of the highly viscous liquid is not increased. To reduce the flow resistance. Usually, it is desirable that the length of the conduit portion is about twice the length inside the cylinder. A check valve (B) that allows liquid to pass only downward is attached at any position in the conduit of the piston. As a result, when the piston floats in the direction of the liquid container (upward), the check valve (A) at the connecting portion between the cylinder and the container is closed and the check valve (B) is opened, so that the liquid in the conduit is discharged downward. Flow in the direction. As a result, the liquid is supplied toward the discharge port at the lower end of the cylinder. Next, when the piston floats in the direction opposite to the container (downward), the check valve (A) opens and the check valve (B) closes, allowing liquid to flow from the container into the cylinder and discharging the liquid. The liquid in the outlet direction is discharged to the outside from the discharge port. As a result, the effect of the pump is given and the liquid raw material having a volume corresponding to the stroke width of the piston is discharged and collected.

A cylindrical magnet having a thickness equal to the height of the piston is fitted on the outside of the cylinder. Since this magnet attracts each other with the internal piston, it is positioned at the same height as the position of the piston, so it does not fall out of the cylinder due to gravity and is always fitted into the cylinder. This cylindrical magnet is installed individually for each container and is never removed. When this cylindrical magnet is moved upward or downward along the direction of the cylinder, the piston inside the cylinder is made of a ferromagnetic material, so that it is attracted to the external magnet and moves freely. If a strong ferrite magnet is used, the mutual attraction force will be extremely large and the piston will always be held exactly at the position (height) of the cylindrical magnet. The position accuracy in this case is extremely good, and sufficiently satisfies the requirements for normal liquid sampling accuracy.

A combination of the above-mentioned discharge device in which the cylinder / piston pump is attached to the lower portion of the liquid container, and the vertical drive device for the cylindrical magnet in which the rotation of the pulse motor is controlled by the electronic computer in accordance with the sampling amount. The minimum unit weighing and sampling device can be configured. In this case, when a cylinder with an inner diameter of 20 mm is used, the amount of liquid discharged when the piston moves 0.5 mm is about 0.15.
Although it has a sufficient measurement accuracy of practical use in ml, the reliability is further improved by additionally using a method in which the sampling container is placed on an electronic balance and the discharge sampling amount is measured by weight. In addition, by combining a transfer device that sends and fixes the discharge device (including the liquid container) to the sampling position and a transfer device that switches the sampling container placed on the electronic balance, and controlling these by a computer, it was completely automated. A liquid measuring and collecting device can be constructed.

[0009]

According to the present invention, since each liquid raw material container is independent and no piping or the like is needed, a large number of containers containing liquid raw materials of each variety used in the experiment are prepared and From the range to be used in the experiment at that time to the liquid metering device of the present invention by arbitrarily selecting only the variety,
In addition, it is possible to arbitrarily collect the required amount of the required variety by replacing it with another group as needed. Therefore, even in a laboratory using a large number of liquid raw materials, a small-scale device with a relatively small number of liquid containers (usually a device capable of mounting 10 to 40) is sufficient as the sampling device. It has the advantage that it can meet the purpose. For example, when arranging liquid containers (volume: 1 L) having a diameter of 8 cm and a height of 25 cm on a turntable having a diameter of about 80 cm in two rows on the turntable, 16 liquid containers per circumference (including a discharging device)
Can be accommodated. If you arrange this in two rows, inside and outside, and switch between the inside and outside sides at any time, you will get 16 ×
Since 2 = 32, 32 kinds of liquid raw materials can be selected and used at the same time. Therefore, the size of the device is 1m x 1m
It is possible to be less than, and it is very advantageous in the installation floor area with respect to the conventional apparatus of this kind of application. Also, the liquid volume can be set by a simple operation of up and down movement according to the specified stroke width of the cylindrical magnet, so the drive device has a simple structure with a function to set the drive width and a vertical drive function. Good. In addition, by combining a turntable (1 row or 2 rows as described above) capable of accommodating about 10 to 40 liquid containers and collection containers respectively, as a transfer device, a personal computer and a sequencer or pulse motor control device controlled by the computer can be used. By controlling, it is possible to input the preparation recipe into the computer and automatically select the liquid raw material of the required type, collect the required amount and prepare the composition composition corresponding to the composition prescription. Not only does it show the same performance as conventional equipment used in the dyeing industry for ordinary low-viscosity liquids, but it also accurately measures high-viscosity liquids that were difficult to implement in the past. Collection and blending are also possible.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the discharge device of the present invention will be described with reference to FIG. 1, and the configuration and operation of a weighing and sampling device using a turntable as a transfer device will be described with reference to FIG.

In FIG. 1, a cylinder (2) is attached downward to the bottom surface of the liquid container (1). A cylindrical magnet (3) is fitted to the outside of the cylinder so as to be slidable up and down, and the cylindrical magnet (3) is attached to the cylinder (2).
The piston (4), which is freely slidable inside the cylinder by sliding and sliding up and down, slides vertically inside the cylinder (2) together with the cylindrical magnet (3). At the bottom of the liquid container (1), there is a check valve A (5) which allows the liquid to pass only in the downward direction, which gives the action of taking out the liquid. Since the check valve A (5) presses the stainless steel ball from the lower part to the valve seat with a weak spring (6) having a strength to withstand the static pressure of the liquid in the liquid container (1), the piston (4) ) Is lowered and the suction force is exerted, the liquid is made to flow down into the cylinder (2).

The internal structure of the piston (4) has a conduit (7) at the center, and a check valve B (8) at the lower end of the conduit for allowing liquid to pass only downward. This valve is a system in which a stainless steel ball is pressed against the valve seat from the bottom by a spring (9) which is weak enough to withstand the static pressure.
Only when the piston (4) rises, the liquid in the upper part of the piston is caused to flow to the lower part of the piston. The lower part of the check valve B (8) is in a released state up to the discharge port (10), and there is nothing that obstructs the flow between the cylinder (2) and the discharge port (10). The weak spring (9) pushes the ball against the valve seat by pushing it up from the bottom, and when the piston (4) descends, it remains closed, so the liquid raw material in the lower part of the piston (4) is closed. Is accurately discharged from the discharge port (10) in the lower portion and only the volume of the space in which the piston has moved is sampled. Piston (4)
Has a projection (11) for closing the discharge port (10), which comes into contact with the discharge port (10) and closes it when the piston is located at the bottom. Therefore, even after a long time has passed, the liquid raw material stored in the upper liquid container does not leak from the slight gaps of the check valves due to the static pressure due to the drop. The position in this closed state is the bottom dead center of the piston (4), and the discharge amount is 0. The upper part of the piston (4) is made of a ferromagnetic material (eg soft iron). Its surface is treated with Teflon coating or the like to make it resistant to corrosive liquids. Further, the shape of the longitudinal section of this is such that the diameters at the upper and lower ends are made large and the distance to the outer cylindrical magnet (3) is made as small as possible to enhance the mutual attraction effect. The intermediate portion (12) of the piston (4) is a spacer made of a non-magnetic, corrosion-resistant material such as synthetic resin, and has an effect of preventing airtightness of the piston and invasion of unnecessary liquid. The lower part of the piston (4) has only an action as a holding part of the check valve B (8) and has no relation to the magnetic force, so it is made of non-magnetic stainless steel or synthetic resin.

The cylindrical magnet (3) outside the cylinder (2) is two ring-shaped magnets (13) (13 '),
In this way, a plurality (two in this embodiment) are overlapped,
Disks (1) of ferromagnetic material (eg soft iron) on the top and bottom
4, 14 ') are piled up and assembled. It is desirable that the thickness of the cylindrical magnet (3) be equal to the height of the ferromagnetic portion of the piston (4) in terms of magnetic attraction efficiency and positioning accuracy.
Adjust the thickness of (14 '). Since the amount of liquid to be collected is proportional to the floating width of the cylindrical magnet (3), the driving width of the cylindrical magnet (3) is increased when the amount of sampling is large, and it is reduced when the amount of sampling is small. is there. Further, in the case of a liquid having a large viscosity, the flow resistance also becomes large, so that the driving speed of the cylindrical magnet (3) is slowed down to reduce the resistance so that the low speed ejection is performed.

Next, the operation of the liquid measuring and collecting apparatus of the present invention will be described with reference to FIG. A cylinder (2) is attached to the bottom of the liquid container (1). A piston for the discharge device having a check valve is included in the inside thereof, but since this has already been described, the description thereof will be omitted here. A cylindrical magnet (3) for driving a piston is fitted and installed outside the cylinder (2) so that it can slide up and down.
Since the cylindrical magnet (3) is attracted to the piston (4) inside the cylinder (2) by magnetic force and is at the same level as the piston (3), when the magnet up-and-down drive device (20) is not operating (normally Indicates that the discharge amount is 0) is at the lowest position of the piston (4). This is the position of the cylindrical magnet (3) shown by the solid line in FIG. 2, and the upper limit position (3 ') of the cylindrical magnet is shown by the dotted line.

On the right side of the sampling position is a magnet up-and-down driving device (20) for driving the cylindrical magnet (3) up and down.
This is composed of a lever (21) for moving the cylindrical magnet (3) up and down, a screw (22) for driving it up and down, and a pulse motor (23) for rotating this screw. These are magnet up-and-down drive stand (24)
It is assembled and attached on top of the above, and in the start state (corresponding to the liquid amount 0), the tip of the lever (21) is in contact with the lower end of the cylindrical magnet (3).

When various kinds of liquid raw materials are mounted on a transfer device (turntable) (25) and sequentially switched for measurement and sampling, the lever (21) of the magnet up-and-down drive device (20) is used.
Since the tip of the magnet may collide with the cylinder (2), the cylindrical magnet (3), etc. when the transfer device is driven, the entire magnet up-and-down drive device is moved outside this moving space, and the turntable is stopped. At that point, an operation to return to the operating position is required. For this reason, a guide for sliding is attached to the magnet up-and-down drive pedestal (24), and this drive is performed by a motor, a rack and pinion, an air cylinder, or the like. Pulse motor (2) of magnet up-and-down drive (20)
3) is a screw (22) for vertically rotating a lever (21) connected to the pulse motor, the rotation of which is controlled by a pulse generator controlled by a personal computer, a pulse motor driver or the like according to the sampling volume of the liquid raw material. The lever (21) is driven up and down by applying rotation corresponding to the volume of the liquid material to be discharged to the cylinder magnet (3). Further, a touch sensor is provided at the contact portion of the tip of the lever (21) for moving the cylindrical magnet (3) up and down with the bottom of the cylindrical magnet (3).
The position of the bottom dead center of is detected and the information with this point as the reference point is given to the personal computer. The computer recognizes the position of the discharge amount 0 at this stage. After that, the reference position was set for this type.

A sampling container (3) is provided below the discharge port (10).
A turntable (31) for sequentially switching 0) is installed, and an electronic balance (32) is located below this. This electronic balance (32) is located on the lifting device (33), and a block that allows the weighing container (30) to be pushed up from the bottom and floated above the weighing pan of the electronic balance (32) for weight measurement. (34) is attached.

Next, a typical operation method of the liquid measuring and collecting apparatus of the present invention will be described with reference to FIGS. 1 and 2. First, the magnet up-and-down drive unit is retracted to take measures to prevent the cylinder (2) and the cylindrical magnet (3) from colliding with the magnet up-and-down drive unit (20) and its lever (21), and then the cylinder (2) and piston ( A liquid container (1) to which 3) is attached (hereinafter referred to as a discharge device) stores various liquid raw materials to be used in an experiment, and the required number of turntables (2)
Attach to 5). The turntable (25) is rotated under the control of the personal computer, and the discharging device containing the liquid raw material to be sampled is transferred to the sampling position and stopped.
Next, the magnet up-and-down drive device (20) is moved (advanced) to set the tip of the lever (21) for vertically moving the cylindrical magnet (3) so that the cylindrical magnet (3) is driven. In this case, the lever (21) is positioned below the bottom surface of the cylindrical magnet (3) for safety.

The elevating device of the electronic balance (32) is moved to the lowermost position so that the electronic balance (32) and the sampling container turntable (31) under the sampling container push-up block are retracted from the operating range. The turntable (31)
Attach the required collection container to. After installation, select the collection containers (30) to be used one after another and turn the turntable (3
1) to transfer to the sampling position, and the lifting device (33) raises the electronic balance (32) to push the sampling container (30) from the lower part by the block (34) from below to make it float above the surface of the turntable. First, the tare of the sampling container (30) is adjusted. The result is the electronic balance (3
It is transmitted and input to the personal computer through the RS-232C interface attached to 2). In this case, since there is a cylindrical magnet (3) on the upper part of the electronic balance, the tare weight may not show the correct value due to the influence of the magnetism, but what is actually required is the liquid sampled by the discharge device. Therefore, there is no problem even if the tare weight obtained in this state is different from the true value.

Next, the pulse motor (2
The screw (22) is rotated by 3) according to the sampling amount, and the lever (21) that drives the cylindrical magnet (3) up and down is driven. This first raises the cylindrical magnet (3). When the cylindrical magnet (3) rises, the piston (4) inside the cylinder (2) floats due to the magnetic force and rises,
Therefore, the liquid above the piston (3) flows to the lower part of the piston (3). Then pulse motor (2
When the cylindrical magnet (3) is returned to the initial position (lowermost point position) by reversing 3) by the same number of revolutions as when rising, the space below the piston (4) due to the lowering of the liquid raw material piston. Is discharged from the discharge port (10) to the outside and enters the collection container. At this time, the same amount of the liquid material as the discharge amount is supplied to the upper part of the piston from the liquid container (1) through the check valve A (5). This corresponds to the preparation for the next stage. Generally, in the case of a low-viscosity liquid, the sampling accuracy of the capacity method by the piston (4) is good,
Although the weight correction step by the electronic balance can be omitted, in the case of a liquid raw material having a high viscosity, the liquid raw material sampled in the sampling container (30) needs to be weighed and confirmed by the electronic balance (32). In this case, it is necessary that the cylindrical magnet (3) is returned to the lowermost portion. Therefore, in the case of a liquid with high viscosity, if the return is insufficient due to viscous resistance, the pulse motor (2
Even if the lever (21) returns to the reference position by the control of 3), the piston (4) may still be in the descending state because the cylindrical magnet and the piston are in the natural descending system by their own weight. You need to expect a time lag. If there is a shortage of weight at the end of discharge, let the personal computer calculate the difference between the target sampled weight and the actual sampled weight, calculate the additional amount, and perform additional processing in the same way to obtain the target weight. This additional process is repeated until. In the case of a high-viscosity liquid, the collected amount tends to be smaller than the specified weight due to the influence of bubbles contained in the liquid, and as described above, when the cylindrical magnet (3) rises, the piston (4) Due to viscous resistance, pulse motor (2
Since the slip phenomenon of 3) tends to occur and the discharge amount tends to be small, it is often necessary to perform additional treatment once or twice.

When a plurality of types of liquid raw materials are sequentially sampled in one sampling container (30) to prepare a blended composition, the magnet up-down drive device (2
0) is retracted, and the lower part of each discharge device mounted on the turntable (25) is retracted out of the movement range space for transfer of the discharge device so that the lever (21) does not collide with the magnet upper and lower. After the evacuation of the driving device (20) is completed, the turntable (25) is rotated to move the discharging device for the next-produced variety component to the sampling position, and the above sampling operation is repeated.

The collection operation is completed when the collection of the designated number of varieties for one collection container (30) is completed. However, when a large number of blended compositions are sequentially prepared, the collection container turntable is used. Sequential collection container (3) using (31)
0) is switched and transferred to the sampling position, and the discharge device for accommodating the liquid raw material of the type that needs to be sampled is sequentially transferred to the sampling position to continue sampling. In this case, when the collection by one sampling container (30) is completed, the electronic balance (32) is lowered by the elevating device (33) and the sampling container push-up block (34) attached to the weighing pan is used for transferring the sampling container. The turntable (31) is evacuated outside the drive range space to avoid the turntable (31) from colliding with the block (34) due to rotation, and then the turntable (31) is rotated to The collection container (30) is transferred to the collection position and the collection is continued in the same manner as above. In addition, when the collection is completed for each collection container that requires collection for one liquid raw material, the magnet up-down drive device (20) is retracted (retracted) by the above method, and then the liquid raw material turntable (25) is set. Rotate to switch the product type. After the product type switching is completed and the turntable (25) is stopped at the fixed position, the magnet up-and-down drive is moved (advanced) to the operating position, the cylindrical magnet (3) is driven, and the sampling is continued. By giving a program for automatically controlling these operations to the personal computer, all the sampling, blending, etc. are automatically executed only by inputting the sampling prescription.

[0023]

As described above, according to the present invention, a small amount on a laboratory scale for a liquid raw material having a wide viscosity range from a normal low-viscosity liquid to a highly viscous liquid which has been difficult with a conventional apparatus. Since it is possible to perform operations such as measuring and sampling of amounts and blending with high accuracy and automatically, it greatly contributes to improvement of accuracy of experiments in laboratories and promotion of labor saving. In addition, the structure is greatly simplified compared to the automated dispenser device that has been used in the past, and despite the miniaturization, there is no restriction on the number of types of liquid raw materials that can be applied, and the equipment cost In terms of the occupied floor area and expansion of the number of applicable products, it is much superior to the conventional device of this kind, and it is a great contribution to the promotion of rationalization of the laboratory.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a structure of a part of a liquid metering and discharging device according to the present invention.

FIG. 2 is a mechanical part of a typical liquid metering and sampling device configured by combining the liquid metering and discharging device of FIG. 1 and its transfer device, a sampling container transfer device, a magnet up-and-down drive device, a discharge amount weighing device, and the like. It is a block diagram of.

[Explanation of symbols]

1 ... Liquid container, 2 ... Cylinder,
3 ... Cylindrical magnet 3 ... Cylindrical magnet upper limit position, 4 ... Piston,
5 ... Check valve A 6 ... Spring, 7 ... Conduit,
8 ... Check valve B 9 ... Spring, 10 ... Discharge port, 1
1 ... Discharge port lid 12 ... Spacer, 13 ... Ring magnet,
13 '... Ring magnet 14 ... Soft iron disc, 14' ... Soft iron disc 20 ... Magnet vertical drive device, 21 ... Magnet vertical drive lever 22 ... Lever drive screw, 23 ...・ Pulse motor 24 ・ ・ ・ Magnet vertical drive device stand, 25 ・ ・ ・ Turntable for liquid container 30 ・ ・ ・ Sampling container, 31 ・ ・ ・ Turntable for sampling container 32 ・ ・ ・ Electronic balance, 33 ・ ・ ・ Electron Balance lifting device 34 ... Block for pushing up sampling container

Claims (6)

(57) [Claims] 1. A pipe-shaped cylinder of a small diameter made of a non-magnetic material is attached downward to the bottom of a container for containing a liquid raw material, and the liquid is directed downward near the attachment position of the cylinder and the bottom of the container. A non-return valve that allows the liquid to pass therethrough and does not pass upward is provided, and a liquid discharge nozzle is provided at the lower end. A piston made of a ferromagnetic material that can freely reciprocate freely is fitted inside the cylinder, and a conduit through which a liquid can flow is pierced in the center of the piston in the floating direction, and the inside of the conduit, preferably the inlet / outlet of the conduit. Install a check valve at position (1) to allow liquid to pass downward and not to pass liquid upward. A cylindrical magnet that is freely slidable in the vertical direction is fitted to the outside of the cylinder, and the cylindrical magnet is controlled by a computer to adjust the driving width, and the vertical movement drive device adjusts the sampling amount of the liquid raw material. A fixed amount discharge pump is formed by vertically driving the piston in the cylinder in a non-contact state from the outside of the cylinder by vertically driving the corresponding stroke width by the magnetic action of the cylindrical magnet. A liquid measuring and collecting device characterized by discharging a required amount of liquid from the discharge port of the above and collecting the liquid in a collecting container placed below. 2. A container for collecting the discharged liquid raw material is placed on an electronic balance, and the weight of the discharged and sampled liquid is precisely weighed to obtain a deficient weight under the control of a computer, and a capacity corresponding to this weight is obtained. 2. The liquid measuring and sampling apparatus according to claim 1, further comprising a mechanism for performing accurate sampling by repeating the correction operation by additionally discharging the above liquid raw material. 3. A plurality of liquid containers containing liquid raw materials of different types are attached to a transfer device which is installed at a specific position designated for each type, and sampling is performed by computer control. Liquid containers containing liquid raw materials of the following types are automatically selected and sequentially transferred to the sampling position by the transfer device, and multiple types of liquid raw materials are sequentially measured and collected in the sampling container installed below the sampling position. The liquid measuring and collecting apparatus according to claim 1, further comprising a mechanism for performing the operation. 4. A transfer device adapted to attach a large number of collection containers to individual unique positions, and a collection container corresponding to a collection batch to be prepared is installed at each unique position, and the collection containers are sequentially required under the control of a computer. Select the collection container,
The liquid measuring and collecting apparatus according to claim 1, further comprising a mechanism for transferring to the collecting position by the transfer device to perform measuring and collecting. 5. The mechanism according to claim 3 and claim 4 is provided,
The liquid according to claim 1, further comprising a mechanism for automatically transferring each of the liquid raw material and the sampling container to the sampling position under the control of the computer so that a large number of blended compositions can be automatically prepared in sequence. Weighing device 6. The mechanism according to claim 5 is provided with the mechanism according to claim 2, wherein the liquid raw material and the collection container are automatically transferred to the collection position under the control of a computer,
2. The liquid weighing and sampling apparatus according to claim 1, wherein the sampled liquid raw material is weighed by an electronic balance and a weight correction operation is performed to automatically prepare a large number of highly accurate blended compositions in sequence.