JPH06194276A - Precisely weighing and dispensing apparatus for powder analyzing sample - Google Patents

Abstract

PURPOSE:To provide an apparatus for precisely weighing and dispensing resin powder sample of a suitable quantity corresponding to an analysis item without manual labor in the inspecting steps. CONSTITUTION:An apparatus for precisely weighing and dispensing powder analyzing sample has a hopper 6 coupled to a vibration drive source 5 connected to a controller mounted on an electronic excretion weight 4 connected to the control circuit. A discharge route 7 connected to a lower opening of the hopper 6 is so inclined in the degree as to make the powder sample flow by a vibration from the source 5 without making the sample flow in not a vibrated state. The source 5 is operated by a control signal from the controller with a weighted value of the weight 4, and a quantity of the sample to be discharged from the hopper 6 can be regulated to a necessary quantity of the sample preset in the controller.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention precisely weighs and samples a sample for analyzing resin powders such as vinyl chloride resin, ABS resin, MBS resin, and powder products such as food powder and cement. It relates to a device for taking.

[0002]

2. Description of the Related Art When producing resin powder or shipping it from a factory, it is analyzed whether or not the prescribed quality is secured,
Quality inspection is performed. The inspection result is returned to the factory and used for improving the manufacturing process, or used for quality display to the shipping destination. For example, in the case of vinyl chloride resin powder, there are various analysis items, such as average degree of polymerization, bulk specific gravity, volatile matter, particle size distribution, amount of foreign matter, residual monomer amount, plasticizer absorbability, dry flow property (flow property), etc. There is an item. Among these analysis items, the average degree of polymerization is calculated by measuring the viscosity of a resin powder sample of a certain concentration and calculating from that viscosity, and the volatile matter is calculated from the difference in the precise weighing of the resin powder sample before and after heating, and the residual monomer amount Is calculated from a quantitative analysis of a fixed amount of resin powder sample by gas chromatography, and the plasticizer absorbability is calculated from the amount of plasticizer remaining after centrifuging the fixed amount of resin powder sample to absorb the plasticizer. In all of these examples, it is necessary to accurately weigh and separate the resin powder sample during the inspection process.

[0003]

Conventionally, these sorting operations are manually performed, which is troublesome, and cleaning of the sorting tools is troublesome. In addition, the analysis item may differ depending on the type of sample, or the amount to be collected may differ depending on the analysis item, so that a measurement error or a measurement omission may occur. The present invention has been made to solve the above problems, and an object of the present invention is to provide an apparatus for precisely weighing and dispensing an appropriate amount of a resin powder sample according to an analysis item without manpower in an inspection process. To do.

[0004]

A precise weighing and dispensing apparatus for a powder product analyzing sample to which the present invention is applied to achieve the above object will be described with reference to FIGS. 1 and 2 corresponding to the embodiments. . As shown in these figures, in the precise weighing and dispensing apparatus for a powder product analysis sample of the present invention, the vibration driving source 5 connected to the control circuit 61 is provided on the electronic discharge weighing scale 4 connected to the control circuit 61. The hopper 6 connected to the hopper 6 is placed, and the discharge path 7 continuous to the lower opening of the hopper 6 is inclined in such a manner that the powder sample does not flow in a stationary state but is caused to flow by the vibration from the vibration drive source 5. The vibration drive source 5 is operated by the control signal from the control circuit 61 based on the weight value of the discharge meter 4 and the amount of the powder sample discharged from the hopper 6 needs to be preset in the control circuit 61. It is characterized by adjusting the amount.

[0005] This precision sample dispenser for powder sample analysis is
A hopper 6 connected to the vibration drive source 5 is preferably mounted on the electronic discharge weighing scale 4 via a shock absorber 8. Further, this powder sample analysis precision balance dispensing device has a suction port 11 communicating with a suction drive device 10 (not shown in FIG. 1), and the suction port 11 is located near the bottom of the hopper 6 and the discharge path 7. It is preferable to move forward / backward by driving the forward / backward drive source 15. The suction port 11 is formed in a box 16 having a shape substantially similar to the shapes of the hopper 6 and the discharge route 7, and the gaps from the suction port 11 to the side wall and the bottom of the hopper 6 and the bottom of the discharge route 7 are small intervals. Has become. The fixed minute interval is preferably 0.5 to 5 mm. The advancing / retreating drive source 15 has an advancing speed of the suction port 11 of 40 cm / sec or less, and more preferably 5 to 40 cm / sec.
Can be set to seconds.

A bar code 2a recording a lot number and / or an analysis item of a sample is attached to a sample container 2 for putting a powder sample into a hopper 6, and a bar code reader 19 for reading the bar code 2a is provided with a control circuit 61. The required amount of the powder sample may be set in the control circuit 61 according to the analysis item transferred from the barcode reader. Further, it is preferable that the electronic balance 13 having a receiver 12a for receiving the powder sample discharged from the hopper 6 and for precisely weighing the powder sample received by the receiver 12a is connected to the control circuit 61.

Further, a robot 3 for gripping and transporting the sample container 2 and the receiver 12a is additionally provided, and an electronic discharge weighing scale 4, a vibration drive source 5, a suction drive device 10, an advance / retreat drive source 15, and a bar. Code reader 19 and electronic balance 13
Then, the robot 3 preferably operates according to the control from the control circuits 61 and 62. An analysis device (not shown) is arranged around this precise sample dispensing device for powder product analysis, and a transfer device 30 and a robot that transfer the sample container 2 containing the powder sample to a position where the robot 3 holds it. 3 is a transporting device 33, 34, 35.3 for transporting the receptacle 12a containing the powder sample from the transporting position to each analyzer.
6 may be attached. In the above-mentioned precise weighing and dispensing apparatus for powder sample analysis, the powder sample can be used for vinyl chloride resin powder, for example.

[0008]

In the device for precisely weighing and analyzing samples for powder product analysis according to the present invention, the powder sample stored in the hopper 6 is discharged through the discharge path 7 by the vibration from the vibration driving source 5. At that time, the weight reduced by the electronic discharge weigher 4, that is, the amount of the discharged powder sample is measured, and the control circuit 61
To enter. The amount of powder sample required for analysis is preset in the control circuit 61, and the electronic discharge weigher 4
When the amount of the powder sample measured by means of reaches the set required amount, the control circuit 61 controls the vibration drive source 5 to stop, and the discharge of the powder sample stops. The required amount of the discharged powder sample is received by the receiver 12a and provided as an analysis sample.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a perspective view of an embodiment of a precise weighing and dispensing apparatus for a powder product analysis sample of the present invention.

As shown in FIG. 1, a hopper 6 and a vibration driving source (vibrator) 5 connected to the hopper 6 are mounted on the electronic discharge weighing scale 4 via a shock absorber 8. The vibration drive source 5 is an electromagnetic vibrator.
A V-shaped discharge path 7 is continuous with the lower opening of the hopper 6. The discharge path 7 is inclined downward to the front, and when the vibrator 5 vibrates, the powder sample in the hopper 6 flows and is discharged, but the powder sample does not flow when the vibrator 5 is stationary. If the receiver 12a is placed just below the tip of the discharge path 7, the powder sample discharged from the hopper 6 can be received. The shock absorber 8 is a rubber cushion and is for preventing the vibration of the vibrator 5 from being transmitted to the electronic discharge weighing scale 4.

A suction port 11 is provided above the electronic discharge weighing scale 4.
Is installed so that it can move up and down. Suction port 11 is suction box 1
The suction driving device 10 is connected to the suction driving device 10 through the hose 17, and the opening portion at the lower end thereof has a shape that matches the bottom portion of the hopper 6 and the bottom portion of the V-shaped discharge path 7. Further, a large number of openings for sucking the powder adhering to the side wall of the hopper 6 are also formed on the side surface of the suction box 16.
The gap between the opening and the side wall or bottom of the hopper 6 and the bottom of the discharge path 7 is preferably about 0.5 to 5 mm. The suction box 16 is attached to a female screw box 20, and the female screw box 20 is screwed with a screw rod 21 connected to a motor 15 which is a forward / backward drive source by a bevel gear 18, and the guide rod 2
The suction port 11 can move up and down along 2 to reach the bottom of the hopper 6 and the bottom of the discharge path 7 to the immediate vicinity. The advancing / retreating drive mechanism can also be implemented by using a pneumatic cylinder or a hydraulic cylinder as a drive source. The advancing speed of the suction port 11 due to the rotation of the motor 15 is 5 to 40
It can be controlled to cm / sec. By controlling the advancing speed in this way, even if there is powder adhering to the side wall of the hopper 6, the suction port 11 can be sucked while suctioning.
Therefore, the suction port 11 does not hit the hopper 6 through the powder adhering to the side wall, and there is no danger of breaking the electronic discharge weighing scale 4 on which the hopper 6 is mounted.

Adjacent to the electronic discharge weigher 4, a roller conveyor 31, a bar code reader 19, and a carry-out table 32 of a carrier device 30 for carrying the sample container 2 for storing the powder sample are arranged in this order. The sample container 2 contains almost all the amount of resin powder to be discharged from the electronic discharge weighing scale 4, and the outer surface is a bar code that encodes inspection condition data such as the product name, lot number, and analysis item of the resin powder. 2a is attached. On the side surface of the roller conveyor 31, a container sensor 41 and an air cylinder 37 that reciprocates in parallel with the conveyance path are arranged. A transport bar 40 is attached to the tip of the movable part via a rotary actuator 39.
Is installed. The carrying bar 40 is moved from the roller conveyor 31 to the carry-out table 3 by the reciprocating motion of the air cylinder 37.
It is displaceable up to 2 and can be swung across the transport path of the roller conveyor 31 by driving the rotary actuator 39. The barcode reader 19 is attached to the side of a turntable 44 provided at the end of the roller conveyor 31. Turntable 4
Reference numeral 4 is a disk-shaped table connected to the gear motor 38.

A transport device 30 via the electronic discharge weigher 4
An electronic balance 13 is arranged on the opposite side of. The weighing platform 46 of the electronic balance 13 is covered with a windshield hood 47 that can be opened and closed by a drive source 48 during weighing.
The carrier device 30, the electronic discharge weighing scale 4, and the electronic balance 1
Guide rails 50 are installed along the arrangement of 3,
A robot 3 that runs on its own is placed there. A table 52 is arranged on the opposite side of the guide rail 50, and on the table 52, the receptacles 12a, 12b, 12c, 12 of a size type suitable for the type of analysis are arranged.
d are arranged. Further, the caterpillar conveyors 33, 3 of the transporting device connected to each of the four types of analyzers not shown
4, 35 and 36 are provided. The above device
As shown in FIG. 2, the container sensor 41, the air cylinder 37, the rotary actuator 39, the robot 3, the vibrator 5, the suction drive device 10, the suction port advancing / retreating drive source motor 15, and the hood drive source of the electronic balance 13 of the transfer device 30. 48 connects to the sequencer 62, and the sequencer 62
Are connected to the arithmetic and control unit (CPU) 61. Further, the bar code reader 19 and the electronic balance 13 are connected to the arithmetic and control unit 61. The electronic discharge weighing scale 4 is operated by the arithmetic controller 6 via the feeder controller circuit 63.
1 and the sequencer 62. The arithmetic and control unit 61 is connected to a host computer by a local area network (LAN).

The above-described precise weighing and dispensing apparatus for powder sample analysis of the present invention operates as follows. The overall control is controlled according to the program of the arithmetic and control unit (CPU) 61, and the individual operation of the device is controlled according to the control program of the sequencer 62. Hereinafter, the program chart of the arithmetic and control unit 61 shown in FIG.
(FIG. 4) and the control program chart of the sequencer 62 shown in the subroutine B (FIGS. 5 and 6). The total amount of powder sample required by each analyzer is roughly weighed and placed in the sample container 2. On the side surface of the sample container 2, a label of a bar code 2a that encodes the production lot number of the powder sample, the analysis item, and the analysis condition data is attached. The sample container 2 is placed on the roller conveyor 31 and conveyed.

After confirming that the device is in the reset state, the transport device 30 turns the sample container 2 into a turntable by the sequencer 62 in a subroutine A shown in FIG. 4 in response to a command from the arithmetic and control unit 61 in step 101 of FIG. Place on top of 44. Step 201 of FIG. 4 (subroutine A)
When the container sensor 41 detects the presence of the sample container 2 in step 4, the rotary actuator 39 operates (step 20).
2) The transport bar 40 rotates to be positioned behind the sample container 2. Here, the air cylinder 37 operates (step 20).
3) Then, the transport bar 40 pushes the sample container 2 onto the turntable 44 to place it thereon. When this operation is completed, the air cylinder 37 returns once and the rotary actuator 39
Performs a recovery operation and the transport bar 40 rotates up. That is, each returns to the home position.

Since the sample container 2 is placed on the turntable 44, the bar code reader 19 reads the bar code 2a in accordance with a command from the arithmetic and control unit 61 in step 102. The barcode reader 19 scans and reads the barcode 2a as the sample container 2 on the turntable 44 is rotated by the drive of the motor 38. And barcode 2a
The manufacturing lot number, the analysis item, and the code of the analysis condition data are decoded and transferred to the arithmetic and control unit 61. The arithmetic and control unit 61 calculates the type of receptor suitable for each analysis and the required amount of powder sample from the analysis item and analysis condition data, and stores it in the feeder controller circuit 63 (step 103).

In step 104, in response to a command from the arithmetic and control unit 61, the sequencer 62 executes the sorting of the powder sample, the precise weighing and a series of operations associated therewith in the subroutine B shown in FIGS. 5 and 6. In step 301 of FIG. 5 (subroutine B), the robot 3 grips and lifts the sample container 2 on the turntable 44, conveys it above the hopper 6, and the tip of the robot 3 rotates and the sample container 2 rotates.
When is turned upside down, the powder sample falls into the hopper 6,
Collect there. As a result, the initial weight of the powder sample is output to the electronic discharge weigher 4, and this initial weight is stored in the feeder controller circuit 63 (step 302). Here, in step 103, the feeder controller circuit 6
The analysis condition suitable for the first analysis item stored in No. 3 is determined (step 303). If the electronic balance 13 does not require a precise balance, the robot 3 takes out the receptacle 12a suitable for the analysis item from the table 52 and places it just below the tip of the discharge path 7 in step 304. Robot 3 here
Is back and waiting. Next, when the vibrator 5 is operated (step 305), the powder sample flows from the hopper 6 and is discharged. The output of the electronic discharge weighing scale 4 decreases from the initial weight stored in the feeder controller circuit 63 by the discharged amount. The discharge amount of the powder sample input to the feeder controller circuit 63 is the same as in step 10 above.
When the required amount of the powder sample stored in step 3 is reached (step 306), the vibrator 5 is stopped (step 307), and a sufficient amount of the powder sample for analysis is accumulated in the receiver 12a. The robot 3 which has been temporarily waiting here is operated again (308), and the receptacle 12a containing the powder sample is received.
Caterpillar conveyor 33 that connects to the desired analyzer
Put on.

In step 309, it is confirmed whether the powder samples for the analysis items have been collected. If not completed, the process returns to step 303 again. Step 303
If the analysis conditions require a precise balance by the electronic balance 13, the robot 3 measures the receptacle 12b suitable for the analysis item from the top of the table 52 and the hood 47 opens the electronic balance 13 in step 320 of FIG. Place on table 46. Next, the drive source 48 is operated to close the hood 47 (step 321), and the measured value, that is, the tare of the receiver 12b is transferred to the arithmetic and control unit 61 via the feeder controller circuit 63 (step 322). The drive source 48 is reversely operated to open the hood 47 (step 32
3) The robot 3 takes out the receptacle 12b from the weighing stand 46 and places it just below the tip of the discharge path 7 (step 32).
4). Next, when the vibrator 5 is operated (step 325), the powder sample flows from the hopper 6 and is discharged. The discharge amount of the powder sample output from the discharge weighing meter 4 is
When the required amount of the powder sample stored in step 103 is reached (step 326), the vibrator 5 is stopped (step 327), and a sufficient amount of the powder sample for analysis is accumulated in the receiver 12b. The robot 3 is operated again (328), and the receptacle 12b containing the powder sample is placed on the weighing table 4
Put in 6. Next, the drive source 48 is operated to operate the hood 47.
After closing (step 329), the weighed value, that is, the weight (gloss) of the tare-filled powder sample of the receiver 12b.
Is transferred to the arithmetic and control unit 61 via the feeder controller circuit 63 (step 330). The drive source 48 is operated in reverse to open the hood 47 (step 33
1), Receptor 12b containing powder sample by robot 3
Caterpillar conveyor 34 that connects the equipment to the desired analyzer
Put on.

In this way, after step 309, in step 303, step 304
Through step 308 or step 320 through step 332 are repeated, and in step 309, the powder sample remaining for the analysis items is cleaned, and the powder sample remaining in the hopper 6 and the discharge path 7 is cleaned. Step 3
When the forward / backward drive motor 15 is rotated at 10, the suction port 11
Moves down to near the bottom of the hopper 6 and the bottom of the discharge path 7. When the suction driving device 10 is driven (step 311), the residual powder sample is sucked through the suction port 11, the suction box 16 and the hose 17. When the suction is completed, the advancing / retreating drive motor 15 is rotated in the reverse direction so that the suction port 11
To the original position (step 312).

When subroutine B is finished as described above,
At steps 322 and 330, the tare of the receiver and the weight (gross) of the powder sample including the tare are input to the arithmetic and control unit 61. In step 105 shown in FIG. 3, the net amount of the powder sample is calculated, and this data is used together with other data, that is, the production lot number of the powder sample, the analysis item, and the analysis condition data, in the local area network (LA).
Transfer to the host computer via N). These data are supplied from the host computer to each analyzer and used to calculate the analysis value. These data are
It may be directly supplied from the arithmetic and control unit 61 to each analysis device via a LAN, or may be supplied to each analysis device via a storage medium such as a disk.

[0021]

As described above in detail, according to the precise weighing and dispensing apparatus for powdery sample analysis to which the present invention is applied, no labor is required by manpower. Even if the analysis item differs depending on the type of sample, or even if the preparative amount differs depending on the analysis item, there will be no measurement error or omission.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a precise weighing and dispensing apparatus for powder sample analysis to which the present invention is applied.

FIG. 2 is a control block diagram of a precise weighing and dispensing apparatus for a powder product analysis sample to which the present invention is applied.

FIG. 3 is a program chart diagram of the arithmetic and control unit.

FIG. 4 is a control program chart of the sequencer.

FIG. 5 is a control program chart of the sequencer.

FIG. 6 is a control program chart of the sequencer.

[Explanation of symbols]

2 is a sample container, 2a is a bar code, 3 is a robot, 4 is an electronic discharge weighing scale, 5 is a vibration drive source, 6 is a hopper, and 7
Is a discharge path, 8 is a shock absorber, 10 is a suction drive device, 11 is a suction port, 12a, 12b, 12c, 12d.
Is a receiver, 13 is an electronic balance, 15 is a forward / backward drive source, 16 is a suction box, 17 is a hose, 18 is a bevel gear, 19 is a bar code reader, 20 is a female screw box, 21 is a threaded rod, 22
Is a guide rod, 30 is a conveying device, 31 is a roller conveyor, 32 is a carry-out table, 33, 34, 35 and 36 are conveying devices, 37 is an air cylinder, 38 is a gear motor, 39 is a rotary actuator, 40 is a conveying bar, 41 Is a container sensor, 44 is a turntable, 46 is a weighing platform, 47
Is a hood, 48 is a hood drive source, 50 is a guide rail,
52 is a table, 61 is an arithmetic and control unit (CPU), 62
Is a sequencer, and 63 is a feeder controller circuit.

Front page continuation (72) Inventor, Hajime Yashiro, 3-43-2, Ebisu, Shibuya-ku, Tokyo Nikkiso Co., Ltd. (72) Keisuke Kato, 3-43-2, Ebisu, Shibuya-ku, Tokyo Nikkiso (72) Inventor Hajime Kitamura Hajime Towada, Kamisu-cho, Kashima-gun, Ibaraki Prefectural Shin-Etsu Chemical Co., Ltd. Yue Chemical Industry Co., Ltd. Kashima Plant Quality Assurance Department (72) Inventor Hideo Yoshikoshi 1 Towada, Kamisu-cho, Kashima-gun, Ibaraki Prefecture Shin-Etsu Chemical Co., Ltd. Kashima Factory Quality Assurance Department (72) Inventor Mikio Kitai Kashima County, Ibaraki Prefecture No. 1 Towada, Kamisu Town, Shin-Etsu Chemical Co., Ltd.

Claims (11)

[Claims] 1. A hopper connected to a vibration driving source connected to the control circuit is placed on an electronic discharge weighing scale connected to the control circuit, and a discharge path continuous to a lower opening of the hopper is provided. The powder sample in the stationary state is inclined so that it flows by the vibration from the vibration drive source without flowing,
The vibration drive source is operated by the control signal from the control circuit according to the weighted value of the electronic discharge weigher, and the amount of the powder sample discharged from the hopper is set in advance in the control circuit. An apparatus for precisely weighing and sorting a powder product analysis sample, which is adjusted to a required amount. 2. The powder sample analysis sample according to claim 1, wherein the hopper connected to the vibration drive source is mounted on the electronic discharge weighing meter via a shock absorber. Precise balance dispenser. 3. A suction port communicating with the suction drive device,
3. The precision weighing and dispensing apparatus for a powder product analysis sample according to claim 1, wherein the suction port is moved forward and backward by driving a forward-backward drive source to a position closest to the bottom of the hopper and the discharge path. 4. The suction port is formed in a box body having a shape substantially similar to the shapes of the hopper and the discharge path, and a gap is provided from the suction port to the side wall and the bottom of the hopper and the bottom of the discharge path. The precise weighing and dispensing device for a sample for powder product analysis according to claim 3, wherein the minute intervals are constant. 5. The advancing / retreating drive source sets the advancing speed of the suction port to 4
4. It can be set to 0 cm / sec or less.
Alternatively, the precise weighing and dispensing apparatus of the sample for powder product analysis according to 4. 6. The precise weighing and dispensing apparatus for a powder product analysis sample according to claim 3, 4 or 5, wherein the fixed minute interval is 0.5 to 5 mm. 7. A bar code recording a lot number and / or an analysis item of a sample is attached to a sample container for putting a powder sample in the hopper, and a bar code reader for reading the bar code is provided in the control circuit. 7. The required amount of powder sample is set in the control circuit according to an analysis item transferred from the bar code reader, and the required amount of powder sample is set in the control circuit. Precision weighing and sorting device for powder product analysis samples. 8. An electronic balance connected to the control circuit, the electronic balance having a receiver for receiving the powder sample discharged from the hopper, and precisely weighing the powder sample received by the receiver. Claims 1, 2, 3, 4, 5, 6 or 7
The precise weighing and dispensing apparatus for the powder product analysis sample according to [1]. 9. A robot for gripping and transporting the sample container and the receiver is attached, the electronic discharge weighing scale,
The vibration drive source, the suction drive device, the advancing / retreating drive source,
9. The powder product according to claim 1, wherein the bar code reader, the electronic balance, and the robot operate under the control of a control circuit. Precision weighing and sorting device for analytical samples. 10. A conveying device, wherein an analyzing device is arranged around the precise weighing and dispensing device for the powder product analyzing sample according to claim 9, and the robot conveys the sample container containing the powder sample to a position where the robot holds the sample container. A precise weighing and dispensing device for a powder product analysis sample, characterized in that it is further provided with a transport device for transporting from a position at which the robot transports the receptacle containing the powder sample to each analyzer. 11. The powder sample according to claim 1, wherein the powder sample is a vinyl chloride resin powder.
The precise weighing and dispensing apparatus for a powder product analysis sample according to 6, 7, 8, 9 or 10.