JPS5925628B2 - Automatic flow control device for color sorter - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement in an automatic flow rate control device for a color sorter.

Conventionally known color sorting machines emit light from a light source onto grains and foreign matter mixed in the grains, such as different-colored grains and foreign particles other than grains, detect the amount of light with a light receiving element, and The detection signal is input to the control circuit, the reference value set in the control circuit is compared with the detection signal of the light receiving element, and the signal of the different color particles other than the reference value is sent to the sorting actuator, and the actuator is activated to remove the different colors. Although it separates particles, there is a limit to the sorting capacity (number of operations) of the sorting body, so it is necessary to adjust the supply flow rate according to the sorting capacity of the sorting body. The amplitude of the vibrating grain feeding trough must be changed by adjusting the current of an electromagnet installed in the trough, and the adjustment must be made each time depending on the mixing rate of different colored particles in the raw material, which is time-consuming and reduces sorting accuracy and performance. There were disadvantages such as reducing

Then, a monitor is provided on the opposite side of the light source, which can use a fluorescent light, and the object to be sorted is passed between the light source and the monitor, and the reflected light or transmitted light from the object to be sorted is detected by the monitor,
The output signal from the monitor is compared to a reference value, and the irregular flow of material etc. is activated to activate the respective injection sorting device depending on whether the compared signal is above or below the reference value. A device for sorting materials is known as Japanese Patent Publication No. 41-16031, but this device cannot adjust the supply flow rate of materials to be sorted by the activation signal of the injection sorting device, and it is not electromagnetic. A continuous transfer device for powder and granular material that adjusts the overflow amount of powder and granular material by adjusting the voltage applied to the vibrating device to adjust the vibration strength of a vibrating plate is known as Japanese Utility Model Publication No. 1735/1983. However, with this method, it was not possible to separate the different color particles in the granular material.

In order to solve the above-mentioned drawbacks, the present invention extracts a signal that increases or decreases with respect to the reference number of times from an amplitude control circuit that compares the operating circuit of the sorting operating body with the reference number of times of operation, and uses the signal to control the vibration grain feeder. Developed a device that automatically adjusts the amplitude of the electromagnet and automatically adjusts the amount of grain flowing out from the vibrating grain feeder so that the grain is sorted within the operating capacity of the sorting device, thereby maintaining high-accuracy sorting rate and sorting ability. This is what we intend to provide.
Embodiments of the present invention will be described with reference to FIGS. 1 to 3. Reference numeral 1 denotes a sorting machine frame, and a vibrating grain feeder 3 equipped with a vibration mechanism 2 consisting of an electromagnet 17 is installed on the upper part of the machine frame 1, a supply hopper 14 is provided on the supply side, and a feed hopper 14 is provided on the discharge side. A downflow gutter 5 connected in a dogleg shape is mounted and fixed, and a light receiving element 6, an injection nozzle 7 of the sorting body 2, and a light source 8 are arranged at the lower part of the flow gutter 5 on both front and rear sides thereof, respectively. It is connected to the chamber frame 10 of the photoelectric sorting chamber 9. Then, the detection signal of the light receiving element 6 is sent to the control circuit 11, and the control circuit 1
An injection electromagnet 19 provided in an injection nozzle device 12A that serves as a sorting actuator for signals other than the reference value with respect to the reference value provided in 1.
are in communication via an actuating circuit 20. The amplitude control circuit 21 controls the injection electromagnet 1 provided in the injection nozzle device 12A.
The branch terminal 24 from the operating circuit 20 of No. 9 is extended and connected in series to one terminal on the input side of the voltage divider 25, the integrating circuit 26, and the setting circuit 27, and the other terminal on the input side of the setting circuit 27 is connected to the reference number of times. A setting device 28 for inputting a resistance value is connected,
A photocoupler 22 consisting of a light emitting diode 29 and a photoconductive material 30 is connected to the output side of the setting circuit 27. Further, both output side terminals of the photocoupler 22 are connected to a drive circuit 18 for an electromagnet 17 provided in the vibrating grain feeding trough 3. With the above configuration, the light source 8 emits light onto the falling locus A of the particles mixed with different colors flowing down from the vibrating grain feeder 3 through the downflow gutter 5, and the light receiving element 6 detects the amount of light of the particles. A detection signal adapted to the control circuit 11 is sent to the control circuit 11.
If the detection signal is due to different color particles, the signal is sent via the operating circuit 20 to the injection electromagnet 19 provided in the injection nozzle device 12A, which serves as the sorting actuator 12, to operate the injection nozzle 7. , the different color particles are separated by the blast action of the nozzle 7 and discharged from the different color particle outlet 13 at the bottom of the empty frame 10, and the sorted regular particles are sent to the machine from the sorted grain outlet 15 of the grain collecting cylinder 14. Take it outside. In this injection sorting step, as the rate of foreign matter contamination in the raw material grain increases or decreases, the number of injections increases or decreases accordingly. The operation signal for this injection selection is sent from the operation circuit 20 to the branch terminal 24 on the input side of the amplitude control circuit 21 in FIG.
6, the circuit 26 integrates the average value within a certain period of time using the signal, and the output signal is sent to the setting circuit 2.
7, the standard number of times (for example, 20
The light emitting diode 29 changes its light intensity according to the input increase/decrease signal, and the photoconductive material 30 changes its light intensity according to the input increase/decrease signal. As a result, its electrical resistance changes significantly, and the current value of the resistor 23 is adjusted by increasing or decreasing it. The increase/decrease signal from the photocoupler 22 is used by the drive circuit 18 to adjust the voltage to the amplitude adjustment section 16 to adjust the amplitude of the electromagnet 17, thereby adjusting the flow rate from the vibrating grain feeder 3 to the operating capacity of the injection nozzle. Adjust accordingly. Therefore, when the number of injections increases, the injection electromagnet 19 of the injection nozzle device 12A automatically reduces the amplitude of the vibration mechanism to reduce the grain flow rate from the vibrating grain feeding trough 3 and sequentially adjusts the number of injections. When the number of injections decreases, the amplitude of the vibration mechanism 2 is increased to increase the flow rate of grains from the vibrating grain feeding trough 3, thereby increasing the number of injections and always performing accurate injection operation. Next, Figure 4 shows
The sorting body 12 is a scatterer 33 device including a protrusion 32 connected to an electromagnet 31 such as a solenoid, and the scatterer 33 device is connected to the electromagnet 31 in response to a detection signal of different color particles from the light receiving element 6. The child 33 momentarily moves back and forth, and the protrusion part 32 comes into contact with the different-colored particles, scattering the particles in a trajectory A, falling into the grain tank 34 for different-colored particles, and accumulating them, and the regular particles falling within the trajectory A. It flows down, is taken out from the grain collection hopper 35, and is entrusted to the next process.

FIGS. 5 and 6 show a scatterer 33 in which the sorting body 12 has a sorting hole 37 opened in a flat plate 36 surface connected to an electromagnet 31.
A flat plate 36 connected to the electromagnet 31 instantaneously moves back and forth in response to a detection signal of different color particles from the light receiving element 6, and when there is no signal, sorted particles pass through the sorting hole 37 and are collected. It is taken out from the cylinder 14, and when there is a signal, it is removed from the sorting hole 37.
is formed so that the particles move and the different color particles are thrown off by the plate surface and are removed from the different color particle outlet (not shown). 7 and 8 show that the sorting body 12 is a scattering rotary plate 40 device equipped with a blade wheel-shaped scattering plate 39 connected to a pulse motor 38, and a detection signal of unusually colored particles is sent from the light receiving element 6. As a result, the pulse motor 38 momentarily rotates for a predetermined pulse time and stops, and the rotating scattering plate 3
Particles of different colors come into contact with the grain hopper 9 and are separated and sorted, and when there is no signal, the scattering plate 39 stops outside the trajectory A, so the sorted particles travel straight along the flow trajectory A and are taken out to the grain collection hopper 35 and then It depends on the process.

As described above, the automatic flow rate control device of the present invention compares the operating signal of the sorting actuating body with the resistance value of the reference number of times, adjusts the amplitude of the electromagnet of the vibrating grain feeding trough based on the increasing or decreasing signal, and operates. The amount of grain flowing out from the grain feeding trough is adjusted to ensure that the grain is sorted within the safe limits of the operating capacity of the sorting actuator, so that high precision sorting rate and sorting efficiency can be maintained at an optimal level and the quality of carefully selected grain can be maintained at all times. This has the effect of smoothly and quickly mass producing products.

[Brief explanation of the drawing]

The drawings are illustrations of embodiments of the present invention. Fig. 1 is a front view of the color sorter, Fig. 2 is a cross-sectional view thereof, Fig. 3 is its electric circuit diagram, Fig. 4 is a side view and plan view of the third embodiment of the sorting body, and Fig. 7. , FIG. 8 is a side view and a plan view of a fourth embodiment of the sorting body. 1...
... Sorting machine frame, 2 ... Vibration mechanism, 3 ...
- Vibrating grain feeder, 4... Supply hopper, 5...
...Flowing gutter, 6... Light receiving element, 7...
・Injection nozzle, 8...Light source, 9...Photoelectric sorting chamber, 10...Empty frame, 11...Control circuit, 12...・Selection operating body, 12A...
... Injection nozzle device, 13 ... Different color particle discharge port, 14 ... Grain collection barrel, 15 ... Sorting grain discharge port, 16 ... Amplitude adjustment Part, 17...
Electromagnet, 18...1 Drive circuit, 19...
・Injection electromagnet, 20... Operating circuit, 21...
... Amplitude control circuit, 22... Auto coupler, 23... Resistor, 24... Branch terminal, 25... Voltage divider, 26... ... Integrating circuit, 27 ... Setting circuit, 28 ... Setting device, 29 ... Light emitting diode, 30 ...
...Photoconductive material, 31...Electromagnet, 32...
... protrusion part, 33... scatterer, 34...
... Grain tank for different color particles, 35 ... Grain collection hopper,
36... Flat plate, 37... Screening hole, 38
...Pulse motor, 39...Scatter plate,
40...Scattered rotating plate, A...Downward trajectory.

Claims (1)

[Claims] 1. A light source emits light onto particles flowing down from a vibrating grain feeder equipped with a swinging mechanism through a downflow gutter, and a light receiving element sends a detection signal that adapts to the amount of light of the particles to a control circuit. In a color sorter, the control circuit sends an activation signal to the sorting actuator to operate the sorting actuator when the detection signal is due to different color particles, and separates the different color particles. the amplitude control circuit and the vibration mechanism drive circuit through a photocoupler. An automatic flow control device for a color sorter, wherein the vibration mechanism is adjusted in accordance with the increase/decrease signal by communicating with the increase/decrease signal. 2. The automatic flow rate control device for a color sorting machine according to claim 1, wherein the sorting body is a jet nozzle device that performs blast sorting by operating an electromagnetic on-off valve. 3. The automatic flow rate control device for a color sorter according to claim 1, wherein the sorting body is a scatterer device equipped with an electromagnet such as a solenoid. 4. The automatic flow rate control device for a color sorter according to claim 1, wherein the sorting body is a scattering rotary plate device equipped with a pulse motor.