JPH0560592A - Hopper feeder of vertical accurate weighing and supply device - Google Patents

Abstract

PURPOSE:To provide a hopper feeder capable of promptly feeding powder many times while holding the accuracy of weighing constant every time as well as casting the powder into a hopper container even while a feed motor is driven and whose washing work is simple, in a vertical powder supply device which accurately measures the quantity of and weighs the powder. CONSTITUTION:A hopper feeder is provided with a primary rotating knife 2 which makes sliding cutting motion by means of rotary motion within a cylindrical portion 1a located in the lower portion of a hopper container 1 for storing powder beta, a primary fixed slit panel 3 located immediately below the knife 2 and causing the roughly weighed powder beta to drop through weighing by the rotary, slidingly cutting action, a secondary rotating knife 4 installed below the slit panel 3, a secondary fixed slit panel 5 being finer than the primary fixed slit panel 3, a feed motor 9 for driving the primary and secondary rotating knives 2, 4, and a transfer rotary shaft for transferring torque. A wash nozzle 7 for injecting a wash liquid and a dry air nozzle 6 for feeding dry air or the like to dry the inside of the hopper container 1 are installed in the upper portion of the inside of the hopper container 1.

Description

Detailed Description of the Invention

[0001]

The present invention relates to semiconductor materials and others,
When performing various processes such as production, analysis, experimentation, quality control, etc. on fine powders of chemicals, chemicals, foods, etc., the feeder of the vertical type fine powder supply device that precisely weighs and supplies the fine powders precisely. Regarding the improvement of the device.

[0002]

2. Description of the Related Art Conventionally, a brush type precision weighing feeder device shown in FIG. 6 is known as a feeder device of a vertical precision weighing and feeding device for handling this kind of fine powder. In the figure, A is a brush type precision weighing feeder device, a is a motor, b is a hopper part, c is a feeder shaft, d is a cylindrical part, e is a screw brush, f is a supply outlet, and g is a constant-feed brush.

[0003]

Since the conventional brush type precision weighing feeder device A has a structure in which the motor a is directly attached to the upper end of the feeder shaft c protruding directly above the hopper part b, the motor a is a fine powder. Is a hindrance when charging the inside of the hopper part b, and charging the fine powder while the motor a is being driven becomes a dangerous work.

When actually used, it takes about 60 seconds to weigh 1 g, and the brush type precision weighing feeder device A is used in the manufacturing process for the purpose of rapid supply of fine powder for multiple times. It is unsuitable, considering that

Further, since it is difficult to put the washing water into the hopper portion b when washing is performed, it is necessary to take out the feeder shaft c together with the screw brush e housed in the cylindrical portion d. Exists.

Further, in actual use, the cylindrical portion d
Since the precision of the fixed amount feed brush g stored in the supply outlet f at the lower end influences the accuracy of the weighing, if the fixed amount feed brush g is worn due to friction with fine powder or the inner surface of the cylindrical portion d, etc. , The accuracy will drop immediately.

The present invention has been made in order to solve the above-mentioned problems. It is possible to carry out quick processing and feeding a number of times, maintain the weighing accuracy constant, and even if the motor is being driven, fine powder can be obtained. An object of the present invention is to provide a hopper feeder device in which the body can be thrown in and the cleaning work is simple.

[0008]

The solution to the above-mentioned problems can be achieved by adopting the novel characteristic construction means listed below in the present invention. That is, the first feature of the present invention is that in a vertical type fine powder precision weighing and feeding device for precisely and quantitatively measuring fine powder, thick radial slit groups are provided above and below the cylindrical portion of the hopper container for storing and storing the fine powder. While arranging a primary fixed slitting machine that is engraved and a secondary fixed slitting machine that is engraved with a group of fine radial slits to divide it into two stages, the upper end of the motor shaft of the supply motor arranged above the hopper container. The lower end of the transmission rotary shaft for coupling coupling is inserted into the cylindrical portion of the hopper container and penetrates through the center of the primary fixed slit board to face directly above the secondary fixed slit board, while, on the other hand, the primary fixed slit board. Secondary rotary slits Fixed rubbing and sliding fine particles into each slit group to drop and weigh primary rotary knife and secondary rotary knife respectively transmission rotary shaft Coaxial fixed to the hopper feeder device of the vertical precision weighing feeder comprising.

A second feature of the present invention is, in the hopper feeder device of the precision weighing and feeding device having the first feature, a cleaning nozzle for injecting a cleaning liquid into the upper part of the hopper container to clean the inside, It is a hopper feeder device of a vertical precision weighing and feeding device provided with a dry air nozzle for sending dry air or the like to dry the inside.

[0010]

According to the present invention, since the above-mentioned means are taken, it is possible to carry out rapid processing and feeding a number of times by high-speed rotary precision weighing of the primary and secondary rotary knives and the primary and secondary fixed slitting machines. As compared with the above-mentioned device, deterioration with time hardly occurs, and the cleaning mechanism and the drying mechanism are installed in the upper part of the hopper container, so that the cleaning operation can be easily performed.

[0011]

Embodiments of the present invention will be described with reference to the drawings. Figure 1
2 is a vertical cross-sectional view of the hopper feeder device of the present embodiment, FIG. 2 is an overall configuration diagram of a vertical precision weighing and feeding system device to which the hopper feeder device of the present embodiment is applied, and FIG. 3 is a dashed line circle in FIG. FIG. 4 is an enlarged view, FIG. 4 is a plan view of a primary and secondary fixed slitting machine that divides the inside of the cylindrical portion at the bottom of the hopper container into two stages, and FIG. FIG. 3 is a front and side view of a primary and secondary rotary knife.

In the figure, α is a hopper feeder of this embodiment, β is a fine powder to be weighed, γ is a control unit, 1 is a hopper portion for storing the fine powder β in the upper part and a cylindrical part 1a in the lower part. A hopper container having 2 a primary rotary knife, 3 a primary fixed slitting disk, 4 a secondary rotary knife, 5 a secondary fixed slitting disk, 6 a cleaning liquid spray nozzle, 7 a dry air nozzle for blowing dry air or the like, Reference numeral 8 denotes a coupling portion that connects the upper end of the transmission rotary shaft 23 that rotates the rotary knives 2 and 4 by fixing them coaxially and the motor shaft 9a of the supply motor 9 that is a drive source.

Reference numeral 10 is a hopper feeder device α for separating the fine powder β inside the hopper container 1 by impact.
Knocker device attached to, 11 is fine powder β out of weighing
A shutter mechanism that can be retracted and retracted to prevent the falling of particles, 12 is a cup that receives the fine powder β that is weighed and supplied from the hopper feeder device α, and 13 is a measurement that measures the fine powder β that is received in the cup 12. A weighing instrument that outputs the signal S1 and a vibration isolation table 14 that prevents vibrations or the like that affect the weighing of the weighing instrument 13.

Reference numeral 15 is an elevating unit for vertically moving the hopper feeder device α, 16a, 16b and 16c are CRT displays, floppy devices (hereinafter referred to as FD devices) and keyboards, 17a is a CRT driver board, and 17b is FD control. The board 17c is a central processing unit (hereinafter referred to as a CPU).

Reference numeral 18a denotes a forward / backward motor 11a for the shutter 11.
And a PI / O board for controlling the knocker device 10, 18b is an SIO board for feedback of the measurement signal S1 from the weighing instrument 13 and data transfer to an external host, and 18c drives the motor 9 and the lifting motor 15a of the lifting unit 15. A motor control board for controlling the motor, 20 is an interface board, 21 is a DC driver for the motor 9, 2
Reference numeral 2 is a driver of the lifting unit lifting motor 15a.

The weighing operation of the vertical precision weighing and feeding apparatus to which the hopper feeder device α of this embodiment is applied will be described with reference to FIGS. 1 and 2. First, data such as an initial operation is given from the keyboard 16c and the FD device 16b in the control unit γ, and the data is calculated by the CPU 17c to be processed by the data bus 19, the interface board 20, and the supply motor 9.
The control signal S2 is supplied via the driver 21 for the motor 9
To reach. The supply motor 9 has a transmission rotary shaft 23.
Rotating knives 2, 4 for fixed slitting machines 3, 5 through
Is rotated to supply the fine powder β to the cup 2 as planned.

The fine powder β contained in the cup 2 is
The measuring signal is measured by the measuring device 13 and is sent out. The measurement signal S1 is the SIO board 1 in the control unit γ.
8c, the CPU 17c performs arithmetic processing, and CR
Whether or not the weighing is appropriate is displayed on the CRT display 16a through the T driver board 17a, and at the same time, when the prescribed weighing is approached, the control signal S2 for stopping the operation of the supply motor 9 is output. The supply motor 9 is stopped by the control signal S2, and the weighing of the fine powder β is completed.

After the completion, the CPU 17c sends a control signal S3 to the advancing / retreating motor 15a so that the shutter mechanism 11 advances and closes so that the unscheduled fine powder β does not drop from the hopper feeder device α and the weighing becomes poor. It should be noted that the knocker device 10 operates during the weighing operation of the hopper feeder device α to prevent the adhesion of the fine powder β in the hopper container 1 and the occurrence of the bridging phenomenon by applying an impact from the surroundings.

Next, the fixed slitters 3, 5 and the rotary knives 2, 4 for precisely weighing the fine powder β will be described with reference to FIGS. 1 and 3 to 5. The fixed slitters 3 and 5 have two types, a primary type and a secondary type. Only the primary fixed slitting disk 3 has a through hole for the rotation transmission shaft 23 in the center, but as shown in FIGS. 4 (a) and 4 (b), the primary fixed slitting disk 3 has a slit 5 a in the secondary fixed slitting disk 5. In comparison, the slit 3a is larger. The reason is as follows.

If, suddenly, the fine powder contained in the hopper container 1 is to be slid and weighed only by the secondary rotary knife 4 and the secondary fixed slitting disk 5 having the slits 5a precisely etched, the fine powder is stored. The weight of β causes the load on the supply motor 9 to be irregular. Therefore, the rotation of the supply motor 9 becomes irregular, and the weighing becomes unstable. This deviates from the original purpose of performing stable precision weighing and performing rapid processing supply many times. Therefore, as a pre-stage for precision weighing, an approximate fixed amount is sent in advance to the secondary fixed slitting disc 5 by the upper fixed slitting disc 3 with the slits 3a having a relatively large mesh size, and the secondary fixing installed in the lower stage. The slit disk 5 is used for precise weighing.

As shown in FIG. 5, the primary and secondary rotary knives 2 and 4 are formed like blades such as a knife so that the thickness thereof decreases toward the bottom. Then, it is coaxially attached to the transmission rotary shaft 23, and can rotate freely in any direction by the rotation of the supply motor 9. The tip portion of the lower part is processed to have an appropriate thickness in order to give elasticity when sliding. The material is preferably engineering plastic or the like in consideration of abrasion resistance.

The cleaning liquid sprayed from the cleaning liquid spraying nozzle 6 applied to this embodiment may be mere water, but if the fine powder is a substance that reacts violently with water (eg sodium). Needless to say, an appropriate cleaning agent such as a water-free detergent is used. The same applies to the dry air or the like sent from the dry air nozzle 7 after cleaning.

[0023]

As described above, according to the present invention, high-speed rotary precision weighing of the primary and secondary rotary knives and the primary and secondary fixed slitting machines makes it possible to rapidly and finely supply fine powder a number of times. Compared to the above-mentioned device, it is less likely to deteriorate with time, and exhibits excellent usability and convenience such as easy cleaning work.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an embodiment of a hopper feeder device of the present invention.

FIG. 2 is an overall configuration diagram of a vertical precision weighing and feeding apparatus including the same as above.

FIG. 3 is an enlarged vertical cross-sectional view of a cylindrical portion of a lower portion of a hopper container.

FIG. 4 is a plan view of a slitting machine that divides the inside of the cylindrical portion at the bottom of the hopper container into two stages, (a) is a primary fixed slitting machine, and (b) is a plan view.
Is a secondary fixed slitting machine.

FIG. 5 shows primary and secondary rotary knives for sliding and weighing fine powder by sliding and rotating on fixed primary and secondary slitting disks.
(A) is a side view and (b) is a front view.

FIG. 6 is a perspective view of a conventional brush-type precision weighing feeder device.

[Explanation of symbols]

 A ... Brush type precision weighing feeder device a ... Motor b ... Hopper part c ... Feeder shaft d ... Cylindrical part e ... Screw brush f ... Supply outlet g ... Constant feed brush α ... Hopper feeder device β ... Fine powder γ ... Control unit DESCRIPTION OF SYMBOLS 1 ... Hopper container 1a ... Cylindrical part 2 ... Primary rotary knife 3 ... Primary fixed slit board 4 ... Secondary rotary knife 5 ... Secondary fixed slit board 3a, 5a ... Slit 6 ... Cleaning liquid spraying nozzle 7 ... Dry air nozzle 8 ... Coupling Part 9 ... Supply motor 10 ... Knocker device 11 ... Shutter mechanism 11a ... Advancing / retreating motor 12 ... Cup 13 ... Measuring instrument 14 ... Vibration isolation stand 15 ... Elevating unit 15a ... Elevating motor 16a ... Keyboard 16b ... Floppy device 16c ... CRT display 17a ... CPU 17b ... CRT driver board 17c ... FD control board 18a ... I / O boards 18b ... SIO board 18c ... motor control board 19 ... data bus 20 ... interface board 21 ... DC driver 22 ... elevation unit for elevating motor driver 23 ... transmission rotary shaft

Claims (2)

[Claims] 1. A vertical type fine powder precision weighing and feeding device for precisely quantitatively weighing fine powder, wherein primary fixing slits are formed by engraving thick radial slit groups at the top and bottom of a cylindrical portion of a hopper container for storing and storing the fine powder. A disc and a secondary fixed slit disc that engraves a group of fine radial slits are arranged to divide the disc into two stages, while the transmission rotation is such that the upper end is coupled to the motor shaft of the supply motor arranged above the hopper container by coupling. The lower end of the shaft is inserted into the cylindrical part of the hopper container and penetrates through the center of the primary fixed slit board to face directly above the secondary fixed slit board, while the primary fixed slit board and the secondary fixed slit board are placed. The primary rotary knife and the secondary rotary knife, which are fixedly rubbed against each other and slid fine particles into the respective slit groups and are weighed, are coaxially fixed to the transmission rotary shaft. Hopper feeder device of the vertical precision weighing feeder, wherein 2. A vertical mold according to claim 1, wherein a cleaning nozzle for injecting a cleaning liquid to clean the inside and a drying air nozzle for discharging the drying air to dry the inside are installed in an upper part of the hopper container. Hopper feeder device of precision weighing and feeding device