JPS6256790B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention supplies a mixed flow of brown rice and unhulled rice removed by demashering to a sorting machine, and extracts brown rice, unhulled rice, In order to keep the removal rate of the mixed grains separated into each grain and discharged into the grain flow down trough almost constant, a photoelectric detection device is installed on the boundary plate installed in the grain flow down trough that separates the brown rice and the mixed grains. established,
The present invention relates to an automatic removal rate control device in a de-sorting machine that adjusts the removal rate in accordance with the amount of foreign matter detected by the photoelectric detection device.

[Prior art and its problems]

In normal de-rolling, the de-rolling wears out and the de-rolling rate decreases with the de-processing time of the unhulled rice supplied to the de-rolling machine, so the de-rolling gap is adjusted at predetermined intervals at predetermined intervals. .
As a means for this purpose, for the purpose of labor saving, a device is generally used in which a load detection device is installed on the drive motor for derolling, and a device is used in which the derolling interval device is connected to the load detection device to maintain the derolling rate constant at all times. ing.

However, in a device that controls the derolling interval by keeping the load detection device of the motor for driving the derolling machine constant, the derolling rate may be insufficient or excessive depending on the quality or moisture content of the unhulled rice supplied to the derolling machine. There were problems such as insufficient capacity of the sorting machine installed in the next process and damage to the brown rice.

Therefore, we installed a light source that irradiates the mixed grains of brown rice and hulled rice flowing down the inclined plate, and a phototube for receiving the light, and connected the light source phototube to a control circuit. This machine is known as Japanese Utility Model Publication No. 46-2432, and while it has the advantage of being able to control the derolling rate within a predetermined range, it also cannot safely control the main motor for driving the derolling machine. Also, mixed grains are supplied from the de-machine to the sorting machine in the next process, but if the de-massage rate is controlled only in the de-machine, it is not possible to ensure good brown rice sorting and high performance by the sorting machine, This method has problems such as fluctuations in the flow rate discharged from the de-machine due to the unhulled rice being returned from the machine to the de-machine, or brown rice mixed into the unhulled rice, causing scratches on the brown rice.

Furthermore, Japanese Utility Model Application Publication No. 117762/1984 is an automatic rice hulling device that improves the above-mentioned problems. This hulling device separates the paddy and brown rice that have been hulled by a huller into a paddy layer, a mixed rice layer of paddy and brown rice, and a brown rice layer using a swinging sorter, and separates the paddy and brown rice from the paddy layer and brown rice layer. ,
Paddy and brown rice are collected by a sample extraction device and sent out from a chute, and a color sorter serving as a means for discriminating paddy and brown rice distinguishes between paddy and brown rice, and the signal is used to separate the partition plate installed on the mounting side of the swing sorter. This automatic hulling device is configured to adjust the movement using a moving means and also adjust the gap between the rubber rolls of the hulling machine. It is necessary to feed the paddy or brown rice to a sorting machine, and the color sorting machine requires a sample extraction device to alternately discharge paddy or brown rice to distinguish between paddy and brown rice, which takes a long time to distinguish between paddy and brown rice. Problems include the time difference in movement and adjustment of the gap between the rubber rolls, which makes the sorting accuracy inaccurate, and the structure of the color sorting machine complicated and expensive.

[Purpose of the invention]

The present invention is intended to improve the above-mentioned problems, and the mixed grains supplied from the de-machine to the sorting plate are concentrated on the sorting plate into brown rice, mixed grains, and unhulled rice, and are separated from the edge of the sorting plate. When discharging grains into the grain flow down trough, a photoelectric detection device installed at the lower side of the mixed grain flow in the grain flow down trough is used to detect foreign matter in the rice grains by detecting foreign matter. By connecting the light source detection device and the de-machine roll load adjustment device through a boundary plate control circuit equipped with a setting device for the number of grains detected, it is possible to In order to prevent the contamination of unhulled rice, the purpose is to constantly adjust the removal rate of the demasher, which stabilizes the mixed grain rate fed into the sorting plate, to a nearly constant level, and to ensure that the detection action of the photoelectric detection device installed in the sorter is accurate and accurate. The purpose is to configure it at low cost.

[Means for solving problems]

In order to achieve the above object, the present invention provides a de-machine that is equipped with a roll load adjustment device on one side and a pair of de-rolls, and a grain that is connected to the end of a sorting plate that is equipped with a rocking device. In a de-sorting device in which a sorting machine having a boundary plate for separating brown rice and mixed grains in a flowing gutter is connected via a grain lifting machine, a photoelectric detection device is installed on the lower side of the mixed grain flow of the boundary plate, and The photoelectric detection device and the roll are connected to each other through a boundary plate control circuit provided with a setting device for the number of detected foreign objects so that the removal rate of the dehulling machine is adjusted to a substantially constant value based on the foreign object paddy detection value of the photoelectric detection device. This problem was solved by connecting it to a load adjustment device.

〔Example〕

One embodiment of the present invention will be described. FIG. 1 shows the entire de-sorting device, in which a de-separator 6 having a supply hopper 12 is provided on one side of the upper part of a box-shaped machine frame 2, and a pair of de-separator rolls 3 and 4 are mounted. 6, a roll load adjustment device is attached to one side of the roll-off 4 of the roll-off 3. The rice husk wind sorting section 1 connected to the mixed grain receiving trough 13 is provided with a box-shaped machine frame inside, and the grain lifting machine 11 with the grain tank 10 suspended on one side thereof is erected to form the mixed grain receiving trough 13. A grain removal machine 6 and a sorting machine 9 are connected to each other by a grain lifting machine 11 to form a sorting device for the grain circulation process. The sorting machine 9 has a grain flow down gutter 14 at the end of the sorting plate 7 equipped with a vibrating device 8, etc., and the grain flow down gutter 14 has a brown rice discharge path 16 and a unhulled rice discharge path 1, respectively.
8. Providing a mixed grain discharge path 17 for mixed paddy/brown rice grains,
The brown rice discharge path 16 is connected to the thrower 19, and the unhulled rice discharge path 18 is connected to the supply hopper 1 via the thrower 21.
2, and the mixed grain discharge passage 17 is connected from the downstream passage 20 to the mixed grain receiving trough 13.

Next, FIGS. 2 and 3 will be explained. A grain flow down gutter 14 is connected to the plate end of the sorting plate 7, and a brown rice discharge path 16, a mixed grain discharge path 17, and a paddy rice discharge path 18 are provided inside the grain flow down gutter 14, respectively. A motor 30 for forward and reverse rotation and a screw shaft 3 on one side.
A reciprocating movement adjustment device 29 is provided in which the grains flow downwardly into the brown rice discharge path 16 and the mixed grain discharge path 17. is attached to the reciprocating movement adjustment device 29.

The boundary plate 15 is provided with a boundary plate control plate 3 provided below the mixed grain flow of the boundary plate 15 with an appropriate interval W therebetween.
2, and a plurality of light sources 23 are installed inside the grain barrel 22.
A photoelectric detection device 25 consisting of an optical sensor including a light receiving element 24 and a light receiving element 24 is provided, and is configured to detect the amount of reflected light from particles flowing down the light-transmitting surface of the photoelectric detection device 25 in contact with each other. The other end of the boundary plate 15 is integrally formed with a position detection section 27 of a movement amount detection device 26 that clearly indicates the distance traveled by moving the boundary plate 15 back and forth. The distance measuring part 28 of the movement amount detection device 26 is provided on the side wall of the grain flow down trough 14, and the tightening operation ring 45 provided at the end of the boundary plate 15 is provided so as to be movable and attachable to the side wall of the grain flow down trough 14, and is movable with the photoelectric detection device 25. The quantity detection device 26 is connected to the boundary plate control panel 32. 42 is a magnetic switch provided in the distance measuring section 28;
is a magnet provided in the position detection section 27.

Next, the electric circuit diagrams shown in FIGS. 4 to 6 will be explained. FIG. 4 shows a load adjustment control circuit 33, in which a contact MC of an electromagnetic contactor is interposed in a circuit connecting the power supply terminals R, S, T and the main motor 34 for derolling, and the terminal The electromagnetic coil MC of the contactor and the button switches S and T are connected in series between R and S, and a current transformer 35 is provided in the circuit of the terminal T, and a rectifier 36 and an integrator 37 are connected in series on the output side. The output side of the integrator 37 is branched and the output side of the integrator 37 is connected to the input side of the comparators 38 and 39, respectively.
A plurality of detectors 43 each consisting of a resistor 41 of an arbitrary voltage and a magnetic switch 42 are arranged in series in the distance measuring section 28 of the movement detecting device 26 to determine the amount of movement of the boundary plate 15. is formed so as to change the voltage and transmit it to communicate with the boundary plate control panel 32, and connect the output side of the circuit of the movement amount detection device 26 to the input side and other side terminals of the comparators 38 and 39, respectively,
Each output side of comparators 38 and 39 is a relay.
The drive device 40 is connected to the electric motor M ₂ for forward and reverse rotation provided in the roll load adjustment device 5 via R ₁ and R ₂ .
has been formed.

In FIG. 7, the boundary plate 15 is automatically controlled by a boundary plate control circuit 48, which controls the light source 2 of the optical sensor provided in the photoelectric detection device 25.
3... so that the light receiving elements 24... receive the reflected light irradiating the grain flux from..., and the terminals of each of the light receiving elements are connected to amplifiers 49A, 49B, 49C...
The input side of the adder 50 is connected to the input side of the adder 50, and each output side thereof is connected by a conducting wire, and one end thereof is connected to the input side of the adder 50, and the output side of the adder 50 is connected to the shift circuit 51.
The variable resistor is connected to the input side of the integrator 52 via the integrator 52, and the input side terminal of the shift circuit 51 is a variable resistor having a reference value for detecting foreign matter unhulled. Also, the integrator 52
The output side of the comparator 53 is branched and one end thereof is connected to the input terminal of the comparator 53, and the other end is connected to the other input terminal of the comparator 54. Upper limit value setting device 5 for the number of detected paddy grains
5, and a setter 56 for the lower limit value of the number of detected grains of foreign matter is connected to the other terminal on the input side of the comparator 54, respectively.
The output side of the comparator 53 is connected via a drive circuit 57 and a relay _R3 to a motor 30 for forward and reverse rotation provided in the reciprocating movement adjustment device 29, so that the motor 30 rotates in the forward direction according to the output signal, and The output side of the comparator 54 is connected to a drive circuit 58 and a relay.
It is connected to the electric motor 30 via _R4 , and the electric motor 30 is configured to rotate in the reverse direction based on the output signal thereof.

The operation of the above embodiment will be explained below. The unhusked rice inputted from the supply hopper 12 is supplied to the de-machine 6, and the de-matter removed between the de-rolls 3 and 4 is screened in the rice husk winding section 1, and the rice husks are discharged outside the machine and remain. The mixed grains of paddy and brown rice are communicated to the grain lifting machine 11 from the mixed grain receiving trough 13. The mixed grains supplied from the grain lifting machine 11 to the sorting plate 7 of the sorting machine 9 via the grain tank 10 are sorted by specific gravity while flowing toward the edge of the sorting plate 7 by the shaking action of the vibration device 8. , brown rice flux O near the front of sorting plate 7
, the unhulled rice grain bundles Q are concentrated toward the rear, the mixed grain bundles P are gathered in the middle, and each grain bundle O, P, and Q are placed in the grain flow down gutter 14 provided at the end of the plate of the sorting plate 7. The grains flow down from the boundary plate 15 provided, respectively, and the grains flow down the gutter 14.
Polished rice is discharged from the thrower 19 from the brown rice discharge passage 16 to the outside of the machine, mixed grains from the mixed grain discharge passage 17 are connected to the mixed grain receiving trough 13 via the flow passage 20, and unhulled rice is discharged from the unhulled rice discharge passage 18 to the thrower 19. 21 and is returned to the supply hopper 12 for re-desorption.

Next, the boundary plate 1 installed in the grain flow down trough of the sorter 9
The operation of the roll load adjusting device for the de-machine 6 will be explained based on the control of 5.

In the area D on the disguised line shown in FIG. 2 as the boundary zone between the brown rice flux O and the mixed grain bundle P flowing on the sorting plate 7, a very small amount of unhulled rice is mixed in the brown rice grain bundle O. Normally, there is a brown rice discharge path 1 from brown rice grain bundle O to an arbitrary position from part D on this temporary line.
There is no mixing of unhulled rice in the brown rice flowing out in step 6, and if the flowing grain tube 22 is installed at an arbitrary position on the lower side of the mixed grain flow of the boundary plate 15 on the side of the unhulled rice grain bundle Q than the part D on the above-mentioned disguise line, The photoelectric detection device 25 can accurately detect foreign substances in the mixed grains flowing down the grain barrel 22.

The setting position of the photoelectric detection device 25 is not in the brown rice grain bundle O near the front of the sorting plate 7, but in a grain bundle slightly mixed with paddy, for example, a mixed flux of about 3 to 5%, and the sorting is performed from this base point. When the distance to the front wall of the plate is L, the voltage based on the amount of reflected light at the L position becomes the reference voltage, and is set in the reference value resistor of the movement amount detection device 26 and the variable resistor 59 of the shift circuit 51, respectively. , there is also a boundary plate 15 at the L-W position.
will be set. Then, when the drive unit and automation device of the device are started, if the mixed grain flux P in the boundary zone moves to the front side and the mixing ratio (reflected light amount) increases, each light received by the photoelectric detection device 25 The elements 24 receive the light and input the signal to the boundary plate control circuit 45, and the relay on the comparator 38 side
Activate _R3 to rotate the electric motor 30 in the forward direction, and
The screw shaft 31 rotates normally and the boundary plate 15 moves toward the brown rice flux O side, and as the boundary plate 15 moves, the magnet 44 of the position detection section 27 provided on the plate 15 moves in the same direction and changes its position. The set voltage of the switch 42 is inputted to the comparator 38 provided in the load adjustment control circuit 33, and compared with the input voltage from the converter 35, and the voltage increase is increased by the voltage increase. The relay R ₁ is operated to rotate the electric motor M ₂ in the forward direction, and the roll load adjustment device 5 rotates in the forward direction to appropriately close the roll gap and increase the ejection rate. Due to this increase in the removal rate, the flux width of the brown rice flux on the sorting plate 7 increases, so the photoelectric detection device 25 moves to the paddy/brown rice flux O side, and the magnet 44 of the boundary plate 15 increases. When moving in the same direction and reaching the reference value resistance value, each drive device 40 and electric motor 30 stop their operation at the reference voltage. In addition, when the mixed grain flux P moves to the rear side and the mixing ratio (reflected light amount) decreases,
The control circuit 33 connects the comparator 39 side, and the control circuit 4
8 actuates the comparator 54 side, reverses the screw shaft 31, moves the boundary plate 15 to the mixed grain flux P side, and adjusts the roll load adjustment device 5 of the remover 6. The load current of the main motor 34 for derolling is transformed by a current transformer 35, rectified by a rectifier 36, and conducted to an integrator 37. ，
39 respectively, and each comparator 38, 39
, an increase/decrease change is input from an arbitrary reference voltage value corresponding to the amount of movement of the boundary plate 15 detected by the amount of movement detection device 36, and both voltages are input to each comparator 38, 39.
The relay _R1 is activated for the increase from the reference voltage value, and the roll load adjustment device 5 is
The motor _M2 for forward and reverse rotation of the drive device 40 is rotated in the forward direction, and the relay is activated for the decrease from the reference voltage value.
When R ₁ is activated, the electric motor M ₂ of the drive device 40 is reversely rotated to adjust the roll gap between the two unrolled rolls 3 and 4, and the voltage is corrected to a predetermined reference voltage (an arbitrary voltage width is provided). , the electric motor _M2 stops its operation.

In addition, the mixed grains flowing through the front surface of the photoelectric detection device 25 provided on the boundary plate 15 are detected by irradiating the foreign grains from each light source 23... and detecting the amount of reflected light by each light receiving element 24... The signal is amplified by each amplifier 49A, 49B, 49C and inputted to an adder 50, and the total number of signals passing through the circuit is cumulatively calculated.The output signal is inputted to a shift circuit 51 and sent to a variable resistor 49. It is compared with a set reference value for detecting foreign grains, and signals below the reference value are shifted and eliminated, and the shift signal of only foreign grains is input to an integrator 52 for integration, and the signals are integrated by each comparator 53,5.
4, and on the comparator 53 side, if the input signal exceeds the upper limit value of the number of detected foreign particles set in the setting device 55, the comparison signal operates relay R ₃ via the drive circuit 57. Therefore, the electric motor 30 rotates in the forward direction and connects the boundary plate 1 through the screw shaft 31.
5 is moved to the brown rice grain bundle O side, and if the input signal on the comparator 54 side falls below the lower limit value of the number of detected foreign particles set in the setting device 56, the comparison signal is transferred via the drive circuit 58. By activating relay _R4 , the electric motor 30 rotates in the opposite direction to move the boundary plate 15 toward the mixed rice grain bundle P side, and the number of foreign particles detected in the fixed number of grains detected and integrated by the sensor is the reference number. When the position of the boundary plate 15 is determined, the movement adjustment is stopped and stabilized.

〔Effect of the invention〕

As explained above, according to the present invention, a boundary plate for separating brown rice and mixed grains is provided inside the grain flow down trough of the sorting machine, and a photoelectric sensor is provided below the mixed grain flow of the boundary plate to measure the foreign matter detected value. A detection device is provided, and the photoelectric detection device and the de-weaving roll load adjustment device are connected via a boundary plate control circuit provided with a setting device for the number of foreign particles to be detected, so that foreign particles can be detected by the photoelectric detection device. The value can be detected accurately, and the automatic evasion control device can operate accurately and stably, and its construction cost can be simplified and reduced.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a side view of the present invention, FIG. 2 is a plan view of the sorting plate, FIG. 3 is an enlarged perspective view of the boundary plate, and FIG. 4 is a diagram showing the structure for adjusting the load. The control circuit diagrams, FIGS. 5 and 6, are both electric circuit diagrams of the movement amount detection device, and FIG. 7 is a control circuit diagram for the boundary plate thereof. 1... Rice husk wind sorting section, 2... Box-shaped machine frame, 3, 4... Unrolling, 5... Roll load adjustment device, 6... Unrolling,
7... Sorting plate, 8... Vibration device, 9... Sorting machine, 10...
Grain tank, 11... Grain lifting machine, 12... Supply hopper, 13... Paddy/brown rice mixed grain receiving trough, 14... Grain flow down trough, 15... Boundary plate, 16, 17, 18... Discharge path, 19... Thrower , 20... Flow path, 21... Thrower, 22... Stream grain tube, 23... Light source, 24... Light receiving element, 25... Photoelectric detection device, 26... Movement amount detection device, 27... Position detection section, 28... Distance measurement section, 29
... Reciprocating movement adjustment device, 30... Forward/reverse rotation electric motor,
31... Spiral shaft, 32... Boundary plate control panel, 33... Load adjustment control circuit, 34... Main motor for derolling,
35... Current transformer, 36... Rectifier, 37... Integrator, 3
8, 39... Comparator, 40... Drive device, 41... Resistor, 42... Magnetic switch, 43... Detector,
44... Magnet, 45... Operating rod for tightening, 46...
Variable resistor, 47... Photocoupler, 48... Boundary plate control circuit, 49, 49A, 49B... Amplifier, 5
0... Adder, 51... Shift circuit, 52... Integrator,
53, 54... Comparator, 55, 56... Setting device, 5
7, 58...drive circuit, 59...variable resistor.

Claims (1)

[Claims] 1. A de-machine equipped with a roll load adjustment device on one side and a pair of de-rolls installed, and a grain flow down trough connected to the end of a sorting plate equipped with a rocking device. In a de-sorting device in which a sorter equipped with a boundary plate for separating brown rice and mixed grains is connected via a grain lifting machine,
A photoelectric detection device is installed on the lower side of the mixed grain flow of the boundary plate, and a setting device for the number of foreign matter detected is installed so that the removal rate of the dehulling machine is adjusted to a substantially constant value based on the value of foreign matter detected by the photoelectric detection device. 1. An automatic removal rate control device for a screening device, characterized in that the photoelectric detection device and the roll load adjustment device are connected via a boundary plate control circuit provided. 2. The automatic escape rate control device in a desorting device according to claim 1, wherein a movement amount detection device for measuring the movement distance of the boundary plate equipped with the photoelectric detection device is installed in the grain flow down trough. 3 A reciprocating movement in which a movement amount detection device for measuring the movement distance of the boundary plate equipped with the photoelectric detection device is attached to the grain flow down gutter, and the photoelectric detection device is moved on the boundary plate via a control circuit. 2. The automatic removal rate control device for a removal rate in a removal sorter according to claim 1, wherein a forward/reverse rotation electric motor provided in the adjustment device and the movement amount detection device are connected to the control circuit provided in the photoelectric detection device.