JP3137481B2 - Automatic bulk density measuring device with static eliminator for powdered products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention automatically determines the bulk specific gravity of powdery products such as vinyl chloride resin, ABS resin, SBC resin, etc., which are easily charged with static electricity, and powder products such as food powder and cement. It relates to a device for measuring.

[0002]

2. Description of the Related Art When a resin powder is produced or shipped from a factory, it is analyzed whether or not a prescribed quality is secured.
A quality inspection is performed. The inspection result is returned to the factory and used for improving the manufacturing process, or is used for quality indication to a shipping destination.

For example, in the case of vinyl chloride resin powder, one of the inspection items is a measurement of bulk specific gravity. The bulk specific gravity is measured by JI
This is performed using a funnel with a damper and a cylindrical receiver as specified in SK-6721. Put the thoroughly stirred powder sample into the funnel, immediately pull out the damper and drop the powder sample into the receiver. After the powder sample rising from the receiver is rubbed off with a glass rod, the mass of the receiver containing the powder sample is accurately measured. The mass of the powder sample alone is obtained by subtracting the mass of the receiver alone from the mass, and the bulk specific gravity is obtained by dividing by the internal volume of the receiver.

[0004]

This JIS-K-67
Even if the rule of 21 is adhered to, if the same sample is measured several times, a reproducible measured value may not be obtained. In particular, when the measurer changes, a considerable variation occurs even with the same sample. Various investigations have been made on this point, but it has been clarified that the measurement value is affected by the charging of the resin powder due to the transportation of the resin powder through a pipe or the change of the measurement environment. For example, when the humidity is different between a sunny day and a rainy day, the charge amount of the resin powder differs and the bulkiness changes. In addition, the bulkiness may change due to a subtle difference in the way of operation accompanying the measurement from time to time. In particular, when the measurer changes, the way of working is considerably different, and this appears as a change in the measured value. For example, the density of the powder sample in the funnel differs depending on whether the powder sample is put into the funnel at once or slowly, and the falling speed of the powder sample from the funnel changes slightly, so that the powder sample in the receiver Will also differ. Also, when dropping the powder sample from the funnel, the speed at which the damper of the funnel is pulled out is different, the speed at which the powder sample touches the receiver on which the sample is raised, and the speed at which the powder sample that is raised is scraped off is reduced. The difference also changes the density of the powder sample in the receiver. As a result, the reproducibility of the measured value of the bulk specific gravity is lost.

[0005] Further, in the conventional measuring apparatus, the work is performed manually, which is troublesome and inefficient. In particular, great care must be taken when handling containers containing powder samples. In addition, unless the receiver is completely cleaned for each measurement, the next measurement value will be inaccurate, and the work of cleaning the receiver every time is troublesome.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is intended to eliminate the influence of electrification and to automatically and continuously measure as little as possible by human hands to obtain a powder product capable of high-precision measurement. It is an object of the present invention to provide a bulk specific gravity automatic measuring device with a static eliminator.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A powder specific gravity automatic measuring apparatus equipped with a static eliminator for a powdered product according to the present invention, which has been made to achieve the above object, will be described with reference to the drawings corresponding to the embodiments.

As shown in FIG. 1, the powder specific gravity automatic measuring device with a static eliminator for a powdered product according to the first invention of the present invention holds and transports a sample container 2 containing a powder sample, and holds the sample at a constant height. Sample container transport robot 3 for inverting the container and opening the powder sample, funnel with open / close bottom lid 14 connected to rotary drive source 17
20, a screw agitator 25 is inserted, and a static elimination liquid supply source
The tip of the tube 54 leading to 54a has been introduced,
The static eliminator 10 receives and stores the powder sample and mixes it with the static elimination liquid, the driving sources 17 and 19 of the static eliminator 10, the funnel 4 with a damper for receiving the powder sample falling from the static eliminator 10, and the damper 5. A damper drive source 5a, a sample sensor 7 for detecting a powder sample falling from the funnel 4 with a damper, a constant volume receiver 6 for receiving the powder sample dropped from the funnel 4 with a damper, and a sliding device which slides on the upper surface of the constant volume receiver 6 A bar 8 and a bar driving source 8 for reciprocating the bar 8
a, a constant-volume receiver transport robot 21 capable of holding and transporting and reversing a constant-volume receiver 6 containing a powder sample, an electronic balance 22 for placing and weighing the transported constant-volume receiver 6, and A cleaner 23 for sucking the weighed powder sample is arranged. As shown in FIG. 5, the sample container transport robot 3, the static eliminator drive sources 17, 19, and 54a, the damper drive source 5a, the cutting bar drive source 8a, the constant volume receiver transport robot 21, the electronic balance 22, and the cleaner 23 include: It operates under the control of the control circuits 61 and 62.

The powder specific gravity automatic gravity measuring apparatus with a static eliminator according to the second invention has a bar code 2a recording a sample lot number and / or inspection conditions on a sample container 2 containing a powder sample. A barcode reader 35 that reads the barcode 2a, grips and transports the sample container 2,
Opening / closing connected to a sample container transport robot 3 that rotates the sample container at a fixed height to open a powder sample and a rotary drive source 17
Insert screw stirrer 25 into funnel 20 with bottom lid 14
And the tip of the tube 54 connected to the static elimination liquid supply source 54a.
The Yes is introduced, the drive source 17 of the charge removing device 10, the discharger 10 to be mixed with蓄留and static liquid undergoing the powder sample
19.54a, a funnel 4 with a damper for receiving the powder sample falling from the static eliminator 10, a damper drive source 5a for inserting and removing the damper 5, a sample sensor 7 for detecting the powder sample falling from the funnel 4 with the damper, a funnel with a damper A constant volume receiver 6 for receiving the powder sample dropped from 4, a slicing rod 8 sliding on the upper surface of the constant volume receiver 6, a slicing rod drive source 8a for reciprocating the slicing rod 8, a constant volume receiver containing the powder sample. A constant-volume receiver transfer robot 21 capable of gripping and transporting and reversing the container 6, an electronic balance 22 for placing and weighing the transported constant-volume receiver 6, and a cleaner 23 for aspirating the weighed powder sample. Is arranged. Bar code reader 35, sample container transport robot 3, static eliminator driving source 17, 19.5
4a, a damper drive source 5a, a razor bar drive source 8a, a constant volume receiver transfer robot 21, an electronic balance 22, and a cleaner 23 operate under the control of control circuits 61 and 62.

The control circuit 6 of the first and second inventions
5 are connected to a host computer as shown in FIG. 5 so that the weighing result output from the control circuits 61 and 62 is transferred to the host computer together with the sample lot number and / or the inspection condition. May be. Further, as shown in FIG.
It is preferable that a transfer device 30 for transferring the sample container 2 to a position where the sample container 2 holding the powder sample is gripped is provided . Screw rotation shaft of the inclination of the inner wall of the leakage <br/> DOO 20 and screw agitator 25 is substantially the same slope, it is preferable that the direction of rotation of the funnel 20 and the screw agitator 25 rotates in the reverse direction.

[0011]

In the first aspect of the present invention, the sample container 2 is gripped by the sample container transport robot 3 and transported to a fixed position above the neutralization device 10 by a command from the control circuit 62 in the powder product automatic bulk density measuring device with the static eliminator. Then, the sample container transport robot 3 is turned over and the powder sample 1 is opened to the static eliminator 10. Static eliminator 10
In the powder sample 1 therein, the static eliminator driving sources 17 and 19 are driven by a command of the control circuit 62, and the charge is eliminated. When static elimination is completed, the powder sample 1 is dropped from the static eliminator 10 and stored in the funnel 4 with a damper. Here, when the damper driving source 5a is driven by a command from the control circuit 62 and the damper 5 is opened, the powder sample 1 in the funnel 4 falls to the constant volume receiver 6 and is heaped. When the end of the drop of the powder sample 1 is detected by the powder sample sensor 7, the control circuit 62 drives the grinding bar drive source 8a. The surging rod 8 slides on the upper surface of the constant volume receiver 6 to scrape off the excess powder sample 1, and the powder sample 1 has a constant volume. Here, the constant-volume receiver transport robot 21 operates according to a command from the control circuit 62, and transports the constant-volume receiver 6 containing the constant-volume powder sample 1 to the electronic balance 22, and the electronic balance 22 performs weighing. . The weighed value (the weight of the constant volume powder sample 1 including the tare) is transferred to the control circuit 61. Next, the constant-volume receiver 6 is transported by the constant-volume receiver transport robot 21 to the cleaner 23 under the control of the control circuit 62 and turned upside down. Here, the powder sucked by the cleaner 23 and remaining inside the constant-volume receiver 6. The sample is cleaned. When the cleaning is completed, the empty constant volume receiver 6 is returned to the electronic balance 22 by the constant volume receiver transport robot 21 and weighed by the electronic balance 22. The weighed value (tare of the constant volume receiver 6) is transferred to the control circuit 61. Next, the constant volume receiver 6 is transported to a fixed position (home position) immediately below the funnel 4 with a damper by the constant volume receiver transport robot 21 under control. The control circuit 61 calculates the value of the bulk specific gravity from the transferred weighed value, that is, the weight of the constant-volume powder sample including the tare, the tare of the constant-volume receiver 6, and the capacity of the constant-volume container stored in advance. .

In the second aspect of the present invention, the powder specific gravity automatic measuring apparatus with a static eliminator removes the bar code 2a of the sample lot number and / or the inspection condition attached to the sample container 2 by a command from the control circuit 61. It is read and stored at 35. After that, the operation of the apparatus for automatically measuring bulk specific gravity with a static eliminator for a powdered product according to the first invention is performed in the same operation order to calculate the value of bulk specific gravity. The calculated value of the bulk specific gravity is used for secondary use, for example, display display, printout, data transfer, etc., together with the stored sample lot number and / or inspection condition data.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view of a powder specific gravity automatic measuring apparatus with a static eliminator of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a main part enlarged view of the front view, FIG. 4 is a main part perspective view, and FIG. It is a control block diagram of a device.

As shown in FIGS. 1 and 2, the sample container 2
The roller conveyor 31, the barcode reader 35, and the unloading table 36 of the transport device 30 for transporting the paper are arranged in this order. A sample container 2 contains a larger amount of resin powder 1 than required for measurement, and a bar code 2a which codes inspection condition data such as the product name, lot number, and inspection items of the resin powder 1 on the outer surface. Is attached.

A path for the sample container 2 is formed on the conveyor 31 by a guide rail 31a laid along the transport direction. In the middle of the passage, the actuator 32a
A bar-shaped stopper 32 is provided which protrudes upward from between the rollers 31 by the reciprocating operation. A container sensor 41 for detecting the presence or absence of the sample container 2 is attached to the container receiving side. On the side surface of the roller conveyor 31, an air cylinder 37 that reciprocates in parallel with the transport path is arranged. A transport bar 33 is attached to the tip of the movable part via a rotary actuator 39. Transport bar 3
Numeral 3 can be displaced from above the roller conveyor 31 to above the carry-out table 36 by reciprocating operation of the air cylinder 37, and can swing across the transport path of the roller conveyor 31 by driving of the rotary actuator 39. The transport bar 33 has one point between the stopper 32 and the end of the roller conveyor 31 as a home position, and a container sensor 4 for detecting the presence or absence of the sample container 2 on the container receiving side.
2 are installed.

The bar code reader 35 is attached to a side of a turntable 34 provided at the end of the roller conveyor 31. The turntable 34 is a disk-shaped table connected to a gear motor 38. Turntable 3
The flat surface adjacent to 4 serves as an unloading table 36 for sending the sample container 2 for which barcode reading has been completed to the next step.

As shown in FIG. 3, the funnel 4 with a damper and the constant volume receiver 6 are arranged vertically. A sample container transport robot 3 is provided above these components. The sample container transport robot 3 grips the sample container 2 and can perform a lifting operation, a rotating operation (see FIG. 2), and an upside-down operation as indicated by a chain line.

The static eliminator 10 is a funnel 20 rotatably supported on the outside.
And the belt 18 is suspended. The open / close bottom cover 14 is in close contact with the inside of the outlet of the funnel 20. The shaft of the opening / closing bottom cover 14 is rotatably fitted to the sleeve 15 and the sleeve 1
5 is the arm 8 of the lifting device 81 operated by wire winding
3 (see FIG. 2). Further, the drive motor 19 of the screw stirrer 25 is attached to the arm 83, and the screw stirrer 25 is inserted into the funnel 20. The inclination of the inner wall of the funnel 20 and the screw rotation axis of the screw agitator 25 are substantially the same. The rotation directions of the funnel 20 and the screw agitator 25 rotate in opposite directions. A dam plate 16 is fixed to the sleeve 15. Therefore, when the motor 17 rotates, the funnel 20 rotates, and the opening / closing bottom cover 14 also frictionally rotates, but the sleeve 15 and the weir plate 16
Does not rotate. A vibrator 59 is attached to the back of the funnel 20. Further, a distal end of a neutralizing solution tube 54 connected to a neutralizing solution supply source 54a (not shown in FIGS. 1, 2, and 3) is introduced toward the inside of the funnel 20. An air tube 55 is introduced inside the funnel 20. The air tube 55 is connected to an air supply source 58a (FIG. 1,
2 and 3 (not shown).

The funnel 4 with a damper is JIS-K-6721.
It is defined and is supported by a support member 13 that protrudes horizontally from a support plate 12 erected on a base 50. As shown in FIG. 4, a vibrator 51 is attached to the back of the funnel 4, and a U-shaped vibration bar 51 a extending from the vibrator 51 to the vicinity of the discharge port is introduced into the funnel 4, and an air tube 58 is provided. Has been introduced. The air tube 58 is connected to the air supply source 58a together with the air tube 55.
The air tube 58 and the air tube 55 are connected to each other via separate pipes via pipes branched from a. The damper 5 is connected to an electromagnetic damper drive source 5a that reciprocates in the horizontal direction.

The constant volume receiver 6 is placed on a pedestal 9 attached to a support plate 12 via a support member 64. The constant volume receiver 6 is a cylindrical container having an inner volume of 100 cc specified in JIS-K-6721. A plurality of projections 9a are formed on the upper surface of the pedestal 9, and a through hole 9b is formed between the projections 9a.
The constant volume receiver 6 is placed on the pedestal 9 by point contact between the bottom surface and the tip of the projection 9a. A receiving hopper 11 for the surplus powder sample is arranged below the pedestal 9 and is connected to the suction device 29a.

A powder sample sensor 7 and a cutting rod 8 are arranged between the funnel 4 and the constant volume receiver 6. The powder sample sensor 7 is a photoelectric sensor that irradiates a light beam directly below the funnel 4 and detects the reflected light to detect a drop of the powder sample 1. The cutting rod 8 is connected to an electromagnetic cutting rod driving source 8a that reciprocates in the horizontal direction, and is slidable on the upper surface of the constant volume receiver 6. A suction device 29a is connected to the excess powder sample receiving hopper 11 below the pedestal 9. Further, a container disposal port 53 for disposing of an empty sample container 2 is formed on the back side of the support plate 12 (see FIG. 2).

The electronic balance 22 and the cleaner 23 are moved along the transfer path of the constant-volume receiver transfer robot 21 provided on the base 50.
And a hopper 24 for powder sample disposal.

The constant volume receiver transport robot 21 is configured to
Is attached to an elevating device 28. The elevating device 28 is arranged on a table 27 that moves along a horizontal rail 26. Constant-volume receiver transfer robot 2
Numeral 1 allows a constant volume receiver 6 to be gripped, raised and lowered, horizontally reciprocated, and vertically inverted. The constant-volume receiver transport robot 21 is in front of the base 9 (FIG. 4).
Is the home position. In this position, the constant volume receiver transport robot 21 is on standby to hold the constant volume receiver 6.

The electronic balance 22 is a general-purpose one, and the upper surface of the weighing platform is set at the same height as the tip of the projection 9 a of the pedestal 9.
A transparent windshield cover 85 that covers the weighing platform is provided above the electronic balance 22. The windshield cover 85 is attached to the arm 82 of the elevating device 81 so as to be able to move up and down, and does not come into contact with the weighing table when descending.

The cleaner 23 has an intake port 92 connected to a suction device 29b mounted on a table 91 having the same height as the weighing platform of the electronic balance 22. A plurality of depressions 93 are formed around the inlet 92. When the constant volume receiver 6 is turned down on the intake port 92, the recess 93 becomes an airflow passage communicating the outside and the inside of the constant volume receiver 6. Table 91
A cover 86 is provided above the. The cover 86 is a cylindrical container having a lower part opened and a plurality of air guide holes formed on the upper surface. The cover 86 is attached to a brace 82 of the elevating device 81 and can be moved up and down. When the descent is performed, the cover 86 covers a wider area than a portion of the table 91 where the recess 93 is formed. The hopper 24 for discarding the measured powder sample is connected to the suction device 29b.

As shown in FIG. 5, the above-mentioned apparatus comprises an actuator 32a of a transfer device 30, an air cylinder 37 and a rotary actuator 39, a sample container transfer robot 3, a rotary drive motor 17 of a funnel 20, and a drive motor of a screw agitator 25. 19, static elimination liquid supply source 54a, lifting device 81, vibrator 51, damper drive source 5a, cutting rod drive source 8a, suction device 29a and suction device 29b of cleaner 23, constant volume receiver transfer robot 21, air supply source 58a, And are connected to the sequencer 62, and the sequencer 62 is connected to the arithmetic and control unit (CPU) 61. Further, the arithmetic and control unit 61 includes a barcode reader 35.
And an electronic balance 22 are connected, and are connected to a host computer by a local area network (LAN).

The apparatus for automatically measuring bulk specific gravity with a static eliminator of a powder product according to the present invention operates as follows. The overall control is controlled according to a program of an arithmetic and control unit (CPU) 61, and the individual operation of the device is controlled according to a control program of a sequencer 62. Hereinafter, a program chart of the arithmetic and control unit 61 shown in FIG.
(FIG. 7), subroutine B (FIG. 8), subroutine C
This will be described with reference to the control program chart of the sequencer 62 shown in FIG.

A powder sample 1 of a powdered product is weighed out in an amount of about 120 cc and placed in a sample container 2. On the side surface of the sample container 2, a label of a bar code 2a in which a production lot number, an inspection number, and inspection condition data are coded is attached. When a plurality of sample containers 2 are placed on the roller conveyor 31, the sample containers 2 are conveyed while being aligned in a line between the guide rails 31a.

After confirming that the apparatus is in the reset state, in step 101 of FIG. 6, the transfer device 30 is controlled by the sequencer 62 from the sequencer 62 to one of the sample containers 2 in a subroutine A shown in FIG. Alone on the turntable 34. When the container sensor 41 detects the presence of the sample container 2 (Step 201), the actuator 32a operates (Step 202), and the stopper 32 is temporarily retracted by one passage of the first sample container 2. Then, the sample container 2 is transported by the roller conveyor 31 to the transport bar 33 at the home position. The second and subsequent sample containers 2 come into contact with the stopper 32 and stand by.
When the container sensor 42 detects that the sample container 2 has been transported to the transport bar 33 (Step 203), the rotary actuator 39 operates (Step 20).
4) The transport bar 33 moves up, and the leading sample container 2 is transported to the end of the roller conveyor 31. The transport bar 33 returns to the horizontal position and the air cylinder 37 operates (step 205), and the sample container 2 is pushed onto the turntable 34 and put on it. When this operation is completed, the air cylinder 37 returns once.

In step 102, the bar code 2a is read by the bar code reader 35 according to a command from the arithmetic and control unit 61. The barcode reader 35 is a turntable 3
The bar code 2a is scanned and read by rotating the sample container 2 on 4 by the drive of the motor 38. Then, the codes of the production lot number, the inspection number, and the inspection condition data of the barcode 2 a are decoded and transferred to the arithmetic and control unit 61.

In step 103, in response to a command from the arithmetic and control unit 61, the air cylinder 37 operates again in the subroutine B shown in FIG.
1) After the transport bar 33 pushes the sample container 2 on the turntable 34 (shown by a chain line in FIG. 2) to move the sample container 2 to the unloading table 36, the transport bar 33 returns to the home position. In step 302, the sample container transfer robot 3 at the home position grips and lifts the sample container 2 to perform a swiveling operation to transfer the sample container 2 above the funnel 20.
When the tip of the arm rotates and the sample container 2 is turned upside down as shown in FIG. 3, the powder sample 1 falls into the funnel 20 and accumulates there.

When the motor 17 is rotated (step 303), the funnel 20 rotates and the open / close bottom cover 14 also rotates, but the weir plate 16 does not rotate. The motor 19 is rotated (Step 304), and the screw agitator 25 is rotated. Here, when the neutralizing solution supply source 54a is operated (step 305), the neutralizing solution comes out of the tube 54 and is mixed into the powder sample 1. After appropriate stirring and mixing, the rotation of the motor 17 and the motor 19 is stopped. It is preferable that the rotation direction of the funnel 20 and the rotation direction of the screw stirrer 25 are reversed to increase the efficiency of mixing. By providing the non-rotating weir plate 16, even a small amount of the powder sample 1 can be uniformly stirred. As the charge removing liquid, for example, an isopropyl alcohol solution of a cationic surfactant can be used. By using the isopropyl alcohol solvent, the solvent volatilizes abundantly from the powder sample 1, and only the surfactant, which is an effective component of static elimination, remains in the powder sample 1.

A static eliminator is mixed with the powder sample 1 in the funnel 20.
When the work of static elimination with stirring and mixing is completed, step 306
By raising the elevating device 81, the opening / closing bottom lid 14 goes up, and the powder sample 1 falls from the discharge port into the funnel 4 with the damper and accumulates. In this state, the vibrator 59 is operated (step 307).
When the air is blown out from the air tube 55 by driving the 8 a, the powder sample 1 attached to the inside of the funnel 20, the open / close bottom lid 14, the weir plate 16, and the screw agitator 25 is removed, and falls into the funnel 4 with a damper. Then, by lowering the elevating device 81 (step 309), the opening / closing bottom cover 14 closes the outlet of the funnel 20.

Next, when the damper driving source 5a is driven (step 310), the damper 5 is opened, and the powder sample 1 falls to the constant volume receiver 6 on the pedestal 9 and is in a heaping state. At this time, when the end of the drop is detected by the powder sample sensor 7 (step 311), the cutting rod drive source 8a is activated (step 312), and the cutting rod 8 is moved to the constant volume receiver 6 (step 312).
The excess powder sample that has slid on the upper surface of the hopper falls on the pedestal 9 and accumulates in the receiving hopper 11 through the through-hole 9b. The excess powder sample in the hopper 11 is sucked by the suction device 29a (Step 313). Next, in step 314, the constant volume receiver transport robot 21 grasps and transports the constant volume receiver 6, and places it on the electronic balance 22, and then retreats. Step 309
Since the lifting device 81 is lowered and the windshield cover 85 is lowered (see FIG. 3), fluctuation of the balance due to wind can be prevented. Here, the powder sample 1 is measured by the electronic balance 22.
Is weighed. On the other hand, when the air supply source 58a is driven (step 315), air is blown out from the air tube 58 to remove the powder sample attached to the inner wall surface of the funnel 4 in which the damper 5 is open, and the powder sample falls into the receiving hopper 11. I do. Thereafter, the damper driving source 5a is driven (step 316), and the damper 5 is closed.

When this operation is completed, the weight of the powder sample weighed by the electronic balance 22 is transferred to the arithmetic and control unit 61 with the tare of the constant volume receiver 6 in accordance with a command from the arithmetic and control unit 61 in step 104.

In step 105, in response to a command from the arithmetic and control unit 61, the elevating device 81 is operated in a subroutine C from the sequencer 62 (step 401), and the windshield cover 85 is raised to return to the home position. Next, in step 402, the constant volume receiver transfer robot 21 retracted in step 308 is operated to hold the constant volume receiver 6 on the electronic balance 22, transported to the hopper 24, turned upside down, and weighed. After discarding the powder sample, the container is moved above the cleaner 23, and the inverted constant volume receiver 6 is placed on the air inlet 92. Here, the elevating device 81 is operated (step 403), and the cover 86 is lowered to cover the constant volume receiver 6.
When the suction device 29b is operated in step 404, the air flows through the air guide holes on the upper surface of the cover 86 and the table 9 as shown by arrows.
The powder sample flowing into the constant volume receiver 6 through the first recess 93 and remaining on the inner wall surface is removed. At this time, the discarded powder sample stored in the hopper 24 is also sucked. Next, in step 405, the lifting device 81 is operated to raise the cover 86. In step 406, the constant volume receiver transport robot 21 grasps the constant volume receiver 6, returns the electronic volume to the electronic balance 22, and then retracts. Elevating device 8
1 is actuated (step 407), and the windshield cover 85 is lowered.

When this operation is completed, in step 106, the weight is weighed by the electronic balance 22 in accordance with a command from the arithmetic and control unit 61, and the weight (tare) of only the constant volume receiver 6 is calculated.
Transferred to 1. In step 107, a subroutine D from the sequencer 62 is issued according to a command from the arithmetic and control unit 61.
(Each step is not shown), the lifting device 81 is operated,
The windshield cover 85 rises. Then, at step 407
Then, the constant-volume receiver transport robot 21 that has been retracted is operated, the constant-volume receiver 6 on the electronic balance 22 is gripped, returned to the pedestal 9, and the constant-volume receiver transport robot 21 is returned to the home position.

On the other hand, the arithmetic and control unit 61 calculates in step 108 the bulk specific gravity = (the weighed value in step 104-the weighed value in step 106) / the capacity of the constant volume receiver 6. In step 108, the calculated bulk specific gravity data is transferred to the LAN together with the production lot number, inspection number, and inspection condition data transferred and stored in step 102.
To the host computer via. These data can be output by a display device or a printer (not shown) connected to the arithmetic and control unit 61.

In step 103, that is, in step 302 of the subroutine B, the sample container transport robot 3 rotates while holding the sample container 2 to open the powder sample 1 in the sample container 2, and then in step 110, the sample container transport robot 3 operates in a subroutine E (not shown) from the sequencer 62, rotates to the rear side of the apparatus as shown in FIG. After the dumping, the sample container transport robot 3 waits on the unloading table 36 (home position).

A series of operation steps 101 to 11 described above
At the end of 0, the device returns to the reset state. In the above apparatus, the start and end of the drop of the powder sample are detected by the powder sample sensor 7, and the required time and the funnel 4 with the damper are detected.
Of the discharge port of the powder and the amount of drop of the powder sample (sample container 2
The flow characteristics of the powder sample 1 can be determined by the arithmetic and control unit 61 from the amount of the powder sample contained in the powder sample 1).

[0041]

As described in detail above, the automatic bulk density measuring apparatus with a static eliminator for powdered products to which the present invention is applied can automatically and continuously measure the bulk specific gravity of powdered products. Just by placing the powder sample of the powder product on the transport device, supply to the bulk specific gravity measuring device, constant volume of the powder sample, weighing, calculation of the bulk specific gravity, completely automatic cleaning of the constant volume receiver has been achieved,
It is extremely effective for labor saving in powder product inspection. Since there is no variation in measurement by a person and the measurement is performed after removing the charge of the powder sample, highly accurate measurement with reproducibility becomes possible. Further, in the measuring device of the present invention, all factors that cause the measurement value to be inaccurate have been improved, and from this aspect, highly accurate measurement is possible.

[Brief description of the drawings]

FIG. 1 is a front view of one embodiment of an apparatus for automatically measuring bulk specific gravity with a static eliminator for a powder product to which the present invention is applied.

FIG. 2 is a plan view of an embodiment of an automatic bulk specific gravity measuring apparatus with a static eliminator for a powder product to which the present invention is applied.

FIG. 3 is an enlarged front view of a main part of an automatic bulk specific gravity measuring apparatus with a static eliminator for a powder product to which the present invention is applied.

FIG. 4 is an enlarged perspective view of a main part of an automatic bulk specific gravity measuring apparatus with a static eliminator for a powder product to which the present invention is applied.

FIG. 5 is a control block diagram of an automatic bulk specific gravity measuring apparatus with a static eliminator for a powder product to which the present invention is applied.

FIG. 6 is a program chart diagram of the arithmetic and control unit.

FIG. 7 is a control program chart of a sequencer.

FIG. 8 is a control program chart of a sequencer.

FIG. 9 is a control program chart of a sequencer.

[Explanation of symbols]

1 is a powder sample, 2 is a sample container, 3 is a sample container transport robot, 4 is a funnel with a damper, 5 is a damper, 5a is a damper driving source, 6 is a constant volume receiver, 7 is a powder sample sensor, and 8 is a bar. , 8a is a bar drive source, 9 is a pedestal, 9a is a projection, 9b is a through hole, 10 is a static eliminator, 11 and 24 are hoppers, 12 is a support plate, 13 and 64 are support members, 14 is an open / close bottom lid, 15 is a sleeve, 16 is a weir plate, 17 and 19 are drive sources of a static eliminator, 18 is a belt, 20 is a funnel, 21 is a transfer robot for a fixed volume receiver, 22 is an electronic balance, 23 is a cleaner, 2
5 is a screw stirrer, 26 is a rail, 27 is a table, 28 is a lifting device, 29a and 29b are suction devices, 30
Is a conveyor, 31 is a roller conveyor, 31a is a guide rail, 32 is a stopper, 32a is an actuator, 3
3 is a transport bar, 34 is a turntable, 35 is a barcode reader, 36 is a carry-out stand, 37 is an air cylinder, 38
Is a gear motor, 39 is a rotary actuator, 4
1 and 42 are container sensors, 50 is a base, 51 and 59 are vibrators, 51a is a vibration bar, 53 is a container disposal port, 54
Is a neutralizing solution tube, 54a is a neutralizing solution supply source, 55 and 58
Is an air tube, 58a is an air supply source, 61 is an arithmetic and control unit, 62 is a sequencer, 81 is a lifting device, 82
83 is a brace, 85 is a windshield cover, 91 is a table, 92
Is an intake port, and 93 is a hollow.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideo Yoshikoshi 1 Towada, Kazu-gun, Kashima-gun, Ibaraki Pref., Kashima Plant Quality Assurance Department, Shin-Etsu Chemical Co., Ltd. 1 Wada Shin-Etsu Chemical Co., Ltd.PVC Research Laboratory (72) Takashi Chino 34-2, Ebisu, Shibuya-ku, Tokyo Nikkiso Co., Ltd. (72) Yuji Nogami 3-chome Ebisu, Shibuya-ku, Tokyo No. 43-2 Nikkiso Co., Ltd. (72) Inventor Kazuki Yajo 3-43-2 Ebisu, Shibuya-ku, Tokyo Japan No. 72 Kiyoshi Kato Inventor Keisuke Kato 3-43, Ebisu, Shibuya-ku, Tokyo No. 2 in Kiso Co., Ltd. (56) References JP-A-57-5640 (JP, A) JP-A-60-4860 (JP, A) JP-A-2-285235 (JP, A) JP-A-2-49147 (JP, A) JP-A-2-127417 (JP, U) JIS-K-6721 (58) Fields investigated (Int. Cl. ⁷ , DB name) G01N 9/00-9 / 36 G01N 35/02 JICST file (JOIS) EPAT (QUESTEL)

Claims (6)

(57) [Claims] 1. A sample container transport robot for gripping and transporting a sample container containing a powder sample, inverting the sample container at a fixed height, and opening the powder sample, and opening and closing connected to a rotary drive source.
Insert the screw stirrer into the funnel with the bottom lid and supply the static elimination liquid
A static eliminator that introduces the tip of a tube connected to the source, receives and stores the powder sample, mixes it with the static elimination liquid, a driving source for the static eliminator, a funnel with a damper that receives the powder sample that falls from the static eliminator, A damper drive source for inserting and removing the damper, a sample sensor for detecting a powder sample falling from the funnel with the damper, a constant volume receiver for receiving the powder sample dropped from the funnel with the damper, a grinding rod sliding on the upper surface of the constant volume receiver, A grinding rod drive source for reciprocating the grinding rod, a constant volume receiver transfer robot that can hold and transport and invert a constant volume receiver containing a powder sample, and place and carry a constant volume receiver that has been transported. An electronic balance to be removed, and a cleaner for sucking the weighed powder sample, the sample container transport robot, the static eliminator drive source, the damper drive source, the grinding bar drive source, and the constant volume receiver. The transfer robot, the electronic balance, and the cleaner discharger with bulk density automatic measuring device of the powder product, characterized in that the operation under the control of the control circuit. 2. A bar code recording a sample lot number and / or an inspection condition is attached to a sample container containing a powder sample, a bar code reader for reading the bar code, and a sample container are gripped and transported. A sample container transport robot that flips the sample container at a certain height to open the powder sample,
Screw into the funnel with open / close bottom lid connected to the rotary drive source
-Insert a stirrer and connect the tube
A static eliminator that has introduced the tip, stores and mixes the powder sample with the static eliminator, a drive source for the static eliminator, a funnel with a damper for receiving the powder sample falling from the static eliminator,
A damper drive source for inserting and removing the damper, a sample sensor for detecting the sample falling from the funnel with the damper, a constant volume receiver for receiving the powder sample dropped from the funnel with the damper, a grinding rod sliding on the upper surface of the constant volume receiver, and a slicing machine A bar drive source for reciprocating the rod, a constant volume container transfer robot capable of holding and transporting and reversing a constant volume container containing a powder sample, and placing and weighing the conveyed constant volume container An electronic balance and a cleaner for sucking the weighed powder sample are arranged, the barcode reader, the sample container transport robot, the static eliminator driving source, the damper driving source, the grinding bar driving source, and the constant volume. The receiver transport robot, the electronic balance, and the cleaner operate according to the control of the control circuit, and the sample lot number and / or inspection conditions read by the bar code reader and the electronic conditions are used. Powder products neutralization apparatus with bulk density automatic measuring apparatus characterized by weighing result by balance is outputted from the control circuit. 3. The control circuit is connected to a host computer, and the weighing result output from the control circuit is transferred to the host computer together with a sample lot number and / or an inspection condition. 3. An automatic bulk density measuring device with a static eliminator for powdered products according to 2. 4. The apparatus according to claim 1, further comprising a transfer device for transferring the sample container transfer robot to a position where the sample container holding the powder sample is gripped by the sample container transfer robot.
4. An automatic bulk specific gravity measuring device with a static eliminator for powdered products according to the item 1. 5. The inclination of the inner wall of the funnel with the openable bottom cover and the screw rotation axis of the screw stirrer are substantially the same, and the rotation directions of the funnel with the openable bottom cover and the screw agitator rotate in opposite directions. Claims 1 and 2,
3. An automatic bulk specific gravity measuring apparatus with a static eliminator for powdered products according to 3 or 4. 6. The apparatus according to claim 1, wherein the powder sample is a vinyl chloride-based resin.