JPS6122711Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a swing sorting device equipped with a grain sensor that detects brown rice, paddy, etc. by transmitting or reflecting a projected light beam onto grains on a sorting plate.

Conventionally, as shown in Japanese Utility Model Application Publication No. 53-54872, there has been a technique in which a sensor for detecting grains is disposed on a sorting plate.

However, in the conventional technology, in addition to the light reflected from the sorting plate surface, light from the side is also likely to enter the sensor, and a device and operation for correcting the amount of light received by the sensor are required, resulting in stable partition plate control. There were problems such as not being able to obtain it easily.

However, in the present invention, a photoelectric sensor is attached to the partition plate provided in the grain discharge section of the sorting plate and is movable in the left and right direction of the discharge part, while a photoelectric sensor is fixed to the left and right walls of the sorting plate and is installed between the sorting plate and the sensor. A movable side light shielding plate having a long hole whose longitudinal direction matches the moving direction of the photoelectric sensor in the supported fixed side light shielding plate, and a hole through which the photoelectric sensor can detect the sorting plate surface through the long hole. The present invention is characterized in that a plate is provided between the sensor and the fixed light shielding plate, and the movable light shielding plate is integrally connected to the sensor.

Therefore, the sensor detects only reflected light in a certain range approximately directly below the sensor through the elongated holes and holes of each of the light shielding plates, thereby preventing input of diffuse reflection of outside light other than the detection light of the sensor and improving detection accuracy. In addition, even if the sensor moves by adjusting the partition plate, only the area of the hole in the movable side light shielding plate remains and other reflected light is blocked. Stable partition plate control can be obtained without the need for
It is possible to easily improve the sorting efficiency and work efficiency in any working environment, and it can be easily handled since there is almost no need to adjust the amount of light received and the sensitivity of the sensor.

An embodiment of the present invention will be described in detail below with reference to the drawings.

Fig. 1 is an overall schematic side view of the oscillating sorting machine according to the present invention, and Fig. 2 is a plan view of the same. A swing sorting device equipped with a plurality of sorting plates 3 in multiple stages for sorting grains into brown rice and paddy; 4 is a supply hopper that stores the grains after hulling; 5 is a sorting plate for sorting the grains in the hopper 4; 3 is a distribution chute for discharging the grains after sorting, and 6 is a discharge gutter for discharging the grains after sorting. The structure is such that brown rice and paddy are separated and sorted by the oscillating motion of 2 and taken out to a delivery chute 7 via a discharge gutter 6.

As shown in FIGS. 3 and 4, the sorting device 2
Each sorting plate 3 is provided in a plurality of stages on a frame 8, and the upper surface of the sorting plate 3 is formed into a resistive rough surface having small waveforms or a plurality of depressions.
The hopper 4 is formed to have a flow angle of an inclination angle β in the front and back (that is, right and left in FIG. 4) and an inclination angle α in the left and right with respect to the horizontal plane of the screen. While the grains distributed and supplied to the upper end of the inclination flow down to the lower end of the inclination, their oscillating motion causes the brown rice layer A to be on the left oscillating up side of the sorting plate 3 and the paddy on the right oscillating down side. The structure is such that the layer B and the mixed rice layer C in the middle are separated and flowed down.

In addition, at the downstream end of the sorting plate 3, there is a brown rice layer A.
A brown rice partition plate 9 that separates the mixed rice layer C and a paddy partition plate 10 that separates the mixed rice layer C and the paddy layer B are provided, respectively, and the brown rice groups separated by the brown rice partition plate 9 are separated from each other by each flow guide plate. Discharge gutter 6 via 11, 12a
The mixed rice group separated by the brown rice partition plate 9 and the paddy partition plate 10 is transferred to the brown rice discharge port 13 of each flow guide plate 12.
Mixed rice discharge port 15 of discharge gutter 6 via b, 14a
Furthermore, the rice grains separated by the rice partition plate 10 are dropped into the rice discharge port 16 of the discharge gutter 6 via the downstream guide plate 14b, and taken out to the delivery chute 7.

Further, the brown rice partition plate 9 is movably connected to a partition adjustment motor 17 attached to the machine body 8 via a screw shaft 18 and an engaging member 19, and
The rice grain partition plate 10 is attached and connected to the machine body 8 via a long hole 20 and a screw member 21 so as to be manually adjustable.

Furthermore, the brown rice and mixed brown rice discharge port 1 is provided in the brown rice falling guide port 23 formed by the guide plate 11 and the grain flow board 22 below the brown rice side of the brown rice partition plate 9.
A switchable opening/closing shutter 24 is provided at the shutters 3 and 15 via a rotary shaft 25, and the switching operation is performed by a bundle 26 or a solenoid 27.

Further, the brown rice partition plate 9 has a partition plate position detection rack 29 and a rod 30 attached via a fixing member 28, and a pinion gear 32 that is linked to a potentiometer 31 which is a position sensor for detecting the position of the partition plate 9. While engaging the racks 29, when the partition plate 9 reaches the end of its left and right movement, the motor 17 is brought into contact with the rod 30.
Stop switches 33 and 34 for stopping the drive of the rod 30 are arranged on the left and right sides of the rod 30.

Furthermore, a photoelectric boundary sensor 36 for paddy detection, which is a grain sensor, is installed at the upper end of the brown rice partition plate 9 via a fixed pavement plate 35. 38, the grains flowing down the mixed rice side of the partition plate 9 are irradiated with light, and the reflected light is received. It is configured to detect the amount of mixture.

Furthermore, photoelectric brown rice and photoelectric paddy sensors 41 and 42, which are grain sensors, are installed on the brown rice side and the paddy side of the frame 8 via fixed mounting plates 39 and 40, respectively, and It is configured to irradiate brown rice and paddy with light and receive the reflected light.

Next, automatic control of the brown rice partition plate 9 will be explained with reference to FIG.

The boundary sensor 36 is connected to one input terminal of a differential amplifier 44 via a buffer circuit 43, and the differential amplifier 44 is connected to the other input terminal of the differential amplifier 44 via the brown rice and paddy sensors 41 and 42. A regulator 46 for setting the level of the 45 output is connected, and the output side of the differential amplifier 44 is electrically connected to the converter 48 via the relay switch 47a of the relay 47, so that the paddy amount detection output of the sensor 36 and a motor 17 that matches the output of a potentiometer 31 that detects the position of the partition plate 9;
The comparator 48 is provided to output a forward/reverse signal. The forward rotation drive circuit 49 of the motor 17 is connected to the comparator 48 through the relay switch 50a of the relay 50 and the switch 33, and the reverse rotation drive circuit 51 of the motor 17 is connected to the comparator 48 through the relay switch 52a of the relay 52 and the switch 34. When the relay switch 47a is turned on, the motor 17 is appropriately rotated forward or reverse depending on the output change due to increase or decrease in the amount of paddy detected by the sensor 36, and the partition plate 9 is moved to the brown rice side or the paddy side. When the output of the potentiometer 31 and the output of the sensor 36 are balanced, the drive of the motor 17 is stopped, and the amount of paddy contained in the mixed rice is controlled at a constant level at the detection position of the sensor 36. This structure is intended to prevent paddy from entering the brown rice side of the partition plate 9.

Further, the relays 50 and 52 are connected to the operating power supply 53 via manual switches 54 and 55 for forward and reverse rotation of the motor, respectively, and these switches 54 and 55 are connected to one NAND circuit 57 of the flip-flop circuit 56 through a notch circuit 58. A partition control automatic switch 61 is connected to the other NAND circuit 59 of the flip-flop circuit 56 via a knot circuit 60, and the output side of the NAND circuit 57 of this flip-flop circuit 56 is connected to a manual indicator lamp 62. Further, the output side of the NAND circuit 59 is connected to the relay 47 via an automatic indicator lamp 63 and a buffer circuit 64, so that the automatic indicator lamp 63 is turned on when the manual switches 54 and 55 are off and the automatic switch 61 is on. Turn on the light and excite the relay 47 to turn on the relay switch 4.
7a is turned on to rotate the motor 17 in the forward and reverse directions under automatic control, while the manual switch 5 is turned on.
When either one of the switches 4 and 55 is turned on, the manual indicator lamp 62 is turned on, and the relay 47 is set to give priority to these switches 54 and 55.
is deenergized to turn off the relay switch 47a, and the relays 50, 52 are energized to turn the relay switches 50a, 52a on and off.
55 circuit side, and the motor 17 is configured to be rotated forward and reverse by manual operation.

Furthermore, the brown rice sensor 41 is connected to the differential amplifier 4.
5 through a buffer circuit 65 to one input terminal of the
Further, the paddy sensor 42 is connected to the other input terminal of the differential amplifier 45 via a buffer circuit 66 and a relay switch 67a of a relay 67, and the differential amplifier connects each input terminal to the reference voltage Vcc and the buffer circuit 66. The relay 6 is connected to the output side of 68.
7 is connected. Furthermore, a regulator 70 is provided for controlling the operation of the relay 50 and the output of the differential amplifier 45 via a relay switch 69a of the relay 69, and the regulator 70 controls the operation of the relay 50 and the output of the differential amplifier 45 via a relay switch 69a of the relay 69. When the paddy sensor 42 is detecting paddy, the relay 67 is excited to turn on the relay switch 67, and the light detected by the sensor 42 and the brown rice sensor 41 is connected to the output side of the paddy sensor 42. While the standard sensitivity of the boundary sensor 36 is automatically set based on the reflection difference, the paddy sensor 42 is automatically set based on the difference in reflection.
When the state is reached where the surface of the sorting plate 3 is detected without detecting paddy, the relay 67 is de-energized and the relay switch 67a is turned off, and the relay 69 is energized and the relay switch 69a is turned on. Then, the relay 50 is energized, the relay switch 50a is switched, the motor 17 is rotated forward, the partition plate 9 is moved to the maximum movement end on the brown rice side, and the brown rice partition width T is minimized. There is.

In addition, a normally open switch 72 that operates in conjunction with the normally closed switch 33, which operates when the brown rice side partition width T of this partition plate 9 is the minimum, is connected to the operating power source 53, and a normally closed limit switch 73 is connected to the switch 72.
and the switching shutter 24 via the operation delay circuit 74.
When the partition plate 9 reaches the maximum movement end on the brown rice side, the solenoid 27 is energized after a predetermined period of time, and the shutter 24 is activated.
The mixed rice outlet 15 is configured to switch from the brown rice outlet 13 to the mixed rice outlet 15. The switch 73 is the third
As shown in the figure, it is installed on the back side of the guide plate 11, and is turned off when the shutter 24 is switched so that the grains on the brown rice side flow down to the mixed rice discharge port 15.

By the way, as shown in FIGS. 6 to 9, a transparent plate 75 is provided on top of the uppermost sorting plate 3.
In order to prevent dust from scattering to the outside, a light shielding plate 76 made of, for example, a dark-colored shielding plate is provided at the sensor 36, 41, 42 setting position of the sorting plate 3. The upper part of the irradiation position is covered with a light shielding plate 76.

The light shielding plate 76 has elongated holes 77 and holes 78 and 79 for passing the projected light beams of the movable boundary sensor 36 and fixed brown rice and paddy sensors 41 and 42, respectively. 41,4
The light emitted from the two light emitting diodes 80 toward the sorting plate 3 hits the grain layer and is reflected, and then passes through the filter 81 to the sensors 36, 41, 42 again.
By passing the light rays received by the photodiode 82 through the holes 77, 78, and 79 during the round trip, unnecessary light rays due to natural light or diffused reflection are blocked by the light shielding plate 76, and the necessary incident light is blocked by the light shielding plate 76. It is configured so that only the light is received by the photodiode 82 to prevent the sensors 36, 41, 42 from erroneously detecting the light.

Further, a rectangular light shielding box 83 is attached to the boundary sensor 36 so that the light shielding plate 76 and the sensor 3
The circumferential side of the 6 spaces is covered in a sealed manner. The shielding box 83
An auxiliary light-shielding plate 84 is provided inside the light-shielding plate 84, and a circular hole 85 for passing the light emitted from the sensor 36 is provided in the center of the light-shielding plate 84.
The shielding box 83 and the auxiliary light shielding plate 84 block unnecessary light such as diffused reflection that enters the sensor 36 through the elongated hole 77 and the hole 85 of the light shielding plate 84. The configuration is such that the light is incident on the photodiode 82 and received by the photodiode 82.

The present embodiment is constructed as described above, and the hulled grains that are now supplied from the hopper 4 onto each sorting plate 3 via the distribution chute 5 are flown down along the inclination angle β. Differences in specific gravity and coefficient of friction, rocking motion of the sorting plate 3, and sorting plate 3
By the rough sorting surface, the brown rice layer A is concentrated on the upper shaking side of the upper end of the inclination angle α, the paddy layer B is concentrated on the lower shaking side, and the mixed rice layer C is concentrated in the middle area. This is separated by the partition plates 9 and 10 provided at the end of the flow and taken out respectively, and the position of the brown rice partition plate 9 is controlled by the paddy detection operation of the boundary sensor 36 in the mixed rice layer C. It is.

In other words, when detecting the difference in light reflection between brown rice and paddy, the reflectance increases in proportion to the amount of mixed paddy, and as a result, the amount of paddy contained in the mixed rice at the detection position of the sensor 36 is higher than usual, and the paddy mixing ratio becomes higher than a certain reference value, the detection output of the sensor 36 also increases, creating an output difference between the output of the potentiometer 31 and the comparator 48 causing the forward rotation drive circuit 49 to be activated. A signal for activation is output. As a result, the partition plate 9 is moved toward the brown rice side, and the partition width T on the brown rice side is automatically adjusted to be small, thereby preventing paddy from entering the brown rice side.

On the other hand, contrary to the above, when the paddy mixing ratio of this mixed rice is lower than the reference value and the detection output of light reflection by the sensor 36 is also small, the comparator 48 outputs a signal to activate the reverse drive circuit 46. , the partition plate 9 is moved toward the paddy side and the partition width T on the brown rice side is automatically adjusted to a large value, thereby appropriately increasing the amount of brown rice to be taken out.

Therefore, when the paddy sensor 42 detects the 3 sides of the sorting plate due to insufficient supply of unsorted grains or the end of sorting, the grain layer becomes thinner and the grains become separated or the paddy floats. The rocking motion of the sorting plate 3 and its rough sorting surface cause the whole to be concentrated on the shaking side, that is, on the brown rice side, without causing any phenomenon, resulting in a problem of poor sorting.

Therefore, when the paddy sensor 42 detects the plate surface of the sorting plate 3, an output balanced with the reference voltage Vcc is input from the paddy sensor 42 to the differential amplifier 68, and the output signal de-energizes the relay 67. When the switch 67a is turned off, the relay 69 is excited by the output inversion signal via the NOT circuit 71, and the relay switch 69a is turned on.As a result, the relay 50 is excited and the relay switch 50a is switched. The motor 17 is driven in normal rotation to move the partition plate 9 to the maximum movement end on the brown rice side, thereby minimizing the partition width T on the brown rice side.

When the partition plate 9 reaches the maximum movement end on the brown rice side, the switch 33 is activated to stop driving the motor 17 and stop the movement of the partition plate 9. At the same time, the normally open switch 72, which is linked to the switch 33, is turned on. After a certain period of time due to the operation, the solenoid 2
7 is energized, the shutter 24 is switched, and grains on the brown rice side are allowed to flow down into the mixed rice outlet 15, thereby preventing rice mixed with paddy from flowing down into the brown rice outlet 13. In addition, the shutter 2
4 switches and the switch 24 comes into contact, the switch 73 is turned off and the solenoid 27
The excitation of is released.

During such work, even under conditions where the light reflectance changes due to changes in the material such as the variety and moisture content of the unsorted grains, the brown rice and paddy sensor 41 detects the reflectance of the brown rice and paddy after this alteration. 42, and the boundary sensor 36 is automatically adjusted to have an appropriate reference sensitivity adapted to the material of the grain based on the difference in reflection.

In addition, the boundary sensor 36 and the brown rice and paddy sensor 41,
During the detection operation, the light shielding plate 76 or the shielding box 83 prevents other unnecessary light rays such as diffusely reflected light from entering the hole 42, and only the necessary working light rays are transmitted to the hole 7.
7, 85, 78, and 79, accurate detection operation can be obtained without malfunction, and as a result, automatic control of the partition plate 9 can be performed properly.

Furthermore, by providing the light shielding plate 76 or the shielding box 83, the sensors 36 and 4 can be separated from the sorting plate 3.
By changing the size of each hole 77, 78, 79, 85, the size of each hole 77, 78, 79, 85 is greatly reduced.
Sensitivity adjustment of 1.42 is also possible.

Note that FIGS. 10 and 11 show the shielding box 8.
10 shows a cylindrical shielding box 83a, and the sensor 36
The passage hole 85a for the projected light beam is connected to the auxiliary light shielding plate 84a.
The one in FIG. 11 shows a rectangular shielding box 83b, and the passage hole 85b is opened in a rectangular shape in an auxiliary light shielding plate 84b. Both have the same effect as the shielding box 83, and detailed explanation thereof will be omitted.

As is clear from the embodiments described above, in this embodiment, a photoelectric sensor 36 is mounted on the partition plate 9 provided at the grain discharge portion of the sorting plate 3 and is movable in the right and left direction of the grain discharge portion.
At the same time, a long hole 77 whose longitudinal direction coincides with the moving direction of the photoelectric sensor 36 is formed in a fixed light shielding plate 76 fixed to the left and right walls of the sorting plate 3 and supported between the sorting plate 3 and the sensor 36. At the same time, a movable light shielding plate 84 having a hole 85 through which the photoelectric sensor 36 can detect the surface of the sorting plate 3 through the elongated hole 77 is provided between the sensor 36 and the fixed light shielding plate 76,
The movable light shielding plate 84 is integrally connected to the sensor 36, and only the reflected light in a certain range approximately directly below the sensor 36 is transmitted to the sensor 36 through the elongated hole 77 and hole 85 of each of the light shielding plates 76, 84. This makes it possible to prevent diffuse reflection input of external light other than the light detected by the sensor 36 and maintain the detection accuracy at a substantially constant level.Also, even if the sensor 36 moves by adjusting the partition plate 9, light is always blocked on the downward movement side. Since only the surface area of the hole 85 in the plate 84 is left and other reflected light is blocked, stable control of the partition plate 9 can be obtained without requiring a received light amount correction device for adjusting the partition plate 9, making it possible to perform any work. It is possible to easily improve the sorting efficiency and work efficiency in the environment, and it also has practical effects such as being able to handle it easily since it is almost unnecessary to adjust the amount of light received by the sensor 36 and the sensitivity. It is something.

[Brief explanation of the drawing]

Figure 1 is an overall side view of the swing sorter, Figure 2 is a plan view of the same, Figure 3 is a front sectional view of the main part, Figure 4 is a side sectional view of the main part, and Figure 5 is the main part. Electric circuit diagram, Fig. 6 is a front view of the main part, Fig. 7 is a plan view of the main part, Fig. 8 is a diagram to explain the operation of the sensor, Fig. 9 is an enlarged explanatory diagram of a part of the main part, Fig. 10 Figures 1 through 11 are explanatory diagrams showing other modified structures. 2... Oscillating sorting device, 3... Sorting plate, 36,3
7, 42...grain sensor, 76, 84...shading plate.

Claims (1)

[Scope of utility model registration request] A photoelectric sensor 36 is attached to the partition plate 9 in the grain discharge section of the sorting plate 3 and is movable in the right and left direction of the discharge section, while a photoelectric sensor 36 is fixed to the left and right walls of the sorting plate 3 and supported between the sorting plate 3 and the sensor 36. A long hole 77 whose longitudinal direction coincides with the moving direction of the photoelectric sensor 36 is formed in the fixed side light shielding plate 76, and a hole through which the photoelectric sensor 36 can detect the surface of the sorting plate 3 through the long hole 77 is formed. 85 is provided between the sensor 36 and the fixed side light shielding plate 76, and the movable side light shielding plate 84 is provided between the sensor 36 and the fixed side light shielding plate 76.
A photoelectric detection device for an oscillating sorter, characterized in that it is integrally connected with.