JPS6236751B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a color sorter for discharging different colored grains from a color sorter for sorting and removing different colored grains such as paddy, contaminated rice, spoiled rice, pebbles, etc. mixed in white rice and shipping homogeneous white rice as a product. Concerning improvements to equipment.

The different color particle emitting device of the conventional color sorter makes the reflected light flowing down from the supply gutter into the light receiving device, and then sends the converted detection signal to the solenoid valve attached to the air nozzle to detect the different color particles. When a particle passes by, the detection signal changes and a solenoid valve is operated to inject compressed air from an air nozzle, releasing the unusually colored particles and causing them to flow down into the discharge gutter.

In addition, as another color sorting machine,
No. 13064, which has a drum equipped with a plurality of nozzles, irradiates light onto the raw material sucked into the nozzles, and determines the quality of the raw material while rotating the drum. A rotary encoder that outputs a signal, a detection device that outputs a pulse signal in accordance with the color or shape of the raw material, a shift register, and the shift register is controlled by each pulse signal of the rotary encoder and the detection device. A device is known that is equipped with a device and removes defective raw materials in response to the output of the shift register.

However, the above-mentioned device is one in which one solenoid valve or defective material removal device is provided for one light receiving element or a plurality of detection devices, and the operation of the solenoid valve or defective material removal device itself is mechanical. It is
The disadvantage is that the time required for operation is long, and because the delay time of operation cannot be ignored, the solenoid valve or defective raw material removal device cannot respond to all input signals when a large number of different colored particles pass through in a short period of time. It was hot.

In order to cope with this, a device in which multiple photoelectric elements were provided corresponding to multiple solenoid valves was developed by JP-A-Sho.
No. 53-137169 has been proposed, but this device has multiple photoelectric elements arranged perpendicular to the direction of movement of rice grains, and a plurality of solenoid valves arranged perpendicular to the direction of movement of rice grains, corresponding to each photoelectric element. This method requires multiple photoelectric elements, and when multiple grains of different colors pass in a short time in a line in the direction of rice grain movement, a solenoid valve that performs mechanical operation responds to all input signals. I was unable to respond.

Furthermore, a sorting device was proposed in Japanese Patent Application Laid-Open No. 18700-1870, in which a plurality of detectors each detecting different colors and brightnesses are provided, and a jet of air is blown based on the combination of the output signals of the plurality of detectors. However, this device also has only one pneumatic removal mechanism that blows an air jet, so in order to sort out small grains such as white rice that pass in large numbers in a short period of time, the pneumatic removal mechanism must be able to remove all the grains. It had the disadvantage of not being able to fully respond to the body.

The present invention has been made in order to eliminate the above-mentioned drawbacks, and provides a color sorter in which a light receiving device and an air nozzle are provided between a supply gutter and a receiving gutter, and a solenoid valve attached to the air nozzle is connected to the light receiving device. In the different color particle emitting device, a plurality of electromagnetic valves are provided for one light receiving device, and the light receiving device is connected to the electromagnetic valve via a signal distribution device that sequentially transmits the sequential operation of the light receiving device to another electromagnetic valve. It is characterized by being connected to a valve.

Next, an embodiment of the different color particle discharging device of the color sorter of the present invention will be described based on the drawings. As shown in FIG. 1, the hopper 17 is connected to the feeder 2, and the feeder 2 is oscillated by the action of the electromagnet 1.
Prevent accumulation of spillage. The feeder 2 communicates with a supply gutter 3, and the lower end of the feed gutter 3 communicates with a receiving gutter 15. As shown in FIG. 2, a light tube 8 and an air nozzle 11 are provided between the lower end of the supply gutter 3 and the receiving gutter 15, and a filter 7 and a lens 6 are provided at the right end of the light tube 8.
and light-receiving elements 5 are arranged so as to have the same optical axis, forming the main part of the light-receiving device.

Moreover, three air nozzles 11 are provided in parallel,
Each air nozzle 11 is connected to a pressure line 19 via three solenoid valves 12, each pressure line 19 communicating with a pressure source 20. A plurality of solenoid valves 12 are provided for one light-receiving element 5, and the light-receiving element 5 is electrically connected to the light-receiving element 5 through a signal distribution device consisting of a circulation counter 21 that sequentially transmits the sequential operation of the light-receiving device to another solenoid valve. are connected to each other. Note that a reference plate 4 is provided so as to face the left end of the light tube 8, and the light receiving element 5 is calibrated.

Next, to explain the operation of the present invention, a material to be sorted, such as polished rice, is supplied from the hopper 17 and flows down the supply gutter 3 while being vibrated by the action of the electromagnet 1 in the feeder 2. The lower end of the supply gutter 3 is a narrow passage, and the falling material enters the receiving gutter 15 in a single line. However, if particles of different colors other than polished rice are mixed in the flowing material, the reflectance or wavelength distribution will be affected. Since the rice is different from that of white rice, the signal of the light receiving element 5 generates a signal, for example, 1, which is different from the signal of white rice, such as 0, and activates the circulation counter 21. Therefore, a filter 7 is used to select the reflected light, and the light is focused by a lens 6 so as to increase the light receiving sensitivity. Since the circulation counter 21 is connected to the solenoid valve 12, when the output signal of the circulation counter 21, for example, the signal 1 mentioned above, is sent to any of the solenoid valves 12, the solenoid valve 12 opens and air is injected from the air nozzle 11. The foreign particles are discharged, and the discharged foreign matter is sent to the discharge gutter 18. Naturally, when the signal is 0, the solenoid valve 12 is closed. In this case, when different colored particles continuously flow down within a short period of time, the detection signal of the different colored particles from the light receiving element 5 is sent to each electromagnetic valve 12 by the circulation counter 21.
Therefore, one of the electromagnetic valves 12 is always ready to respond to the abnormal-color particle detection signal.

When discharging different colored grains using the air nozzle 11, white rice may be discharged at the same time by mistake.
In such a case, a measure is taken to return the polished rice to the hopper 17 again by installing a grain lifting machine (not shown) at the bottom of the discharge gutter. In this embodiment, three air nozzles 11 are provided in parallel, but there may be no problem with one air nozzle 11, and in the case of one air nozzle 11, it is necessary to provide the solenoid valve 12 in parallel with the air nozzle.

As described above, the present invention provides a different color particle emitting device for a color sorter, in which a light receiving device and an air nozzle are provided between a supply gutter and a receiving gutter, and a solenoid valve attached to the air nozzle is connected to the light receiving device. A plurality of solenoid valves are provided for one light receiving device, and the light receiving device is connected to the solenoid valve via a signal distribution device that sequentially transmits the sequential operation of the light receiving device to another solenoid valve. Therefore, although it is a single light receiving device, by sequentially operating multiple mechanical solenoid valves that take a long time to operate compared to an optical light receiving device, it is possible to operate multiple solenoid valves in a short time on one line. It is possible to prevent the solenoid valve from becoming unresponsive even when particles of a different color pass through, and the structure of the light receiving device can be simplified. It has the remarkable effect of almost completely removing mixed colored grains and helping to improve quality control.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of an embodiment of a different-color particle discharging device for a color sorter according to the present invention, and FIG. 2 is an enlarged longitudinal cross-sectional view of the main parts thereof. 1... Electromagnet, 2... Feeder, 3... Supply gutter, 4... Reference plate, 5... Light receiving element, 6... Lens, 7... Filter, 8... Light tube, 11... Air nozzle, 12... Solenoid valve, 14... Pressure pipe, 1
5... Receiving gutter, 17... Hopper, 18... Discharging gutter, 20... Pressure source, 21... Circulation counter.

Claims (1)

[Scope of Claims] 1. A different color particle emitting device for a color sorter, in which a light receiving device and an air nozzle are provided between a supply gutter and a receiving gutter, and a solenoid valve attached to the air nozzle is connected to the light receiving device, A plurality of solenoid valves are provided for one light receiving device, and the light receiving device is connected to the solenoid valve via a signal distribution device that sequentially transmits the sequential operation of the light receiving device to another solenoid valve. A device for discharging different colored grains in a color sorter. 2. The device for discharging different colored grains in a color sorter according to claim 1, wherein the signal distribution device is a circulation counter. 3. The device for discharging different color particles for a color sorter according to claim 1 or 2, wherein the number of air nozzles is plural.