JPS6337331B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a light amount adjustment device for a color sorter. Specifically, the present invention relates to a technique for increasing or decreasing the amount of light from a light source in response to the cause of contamination of different-colored particles in the particles supplied to a color sorter, thereby improving the detection accuracy of a light-receiving element that detects different-colored particles.

[Prior art and its problems]

This type of color sorter allows particles mixed with different colors to flow down from a downflow gutter into a grain collection tube, and a photoelectric sorting chamber consisting of a photoelectric device and a sorting body is installed in the flow trajectory, and the particles flowing down along the trajectory The bundle is irradiated from the light source of the photoelectric device, the reflected or transmitted light is detected by the light receiving element, the detection signal is communicated to the control circuit, and the sorting actuator is actuated in accordance with the detection signal to separate out the unusually colored particles. However, depending on the type and properties of the particles to be sorted, there are cases where different-color particles are detected by receiving changes in the reflected light beam obtained by irradiating the particle bundle on the falling trajectory with a light receiving element, and cases where different color particles are detected by a light receiving element. In some cases, a falling particle flux is irradiated from a light source, and a light-receiving element is disposed opposite to the light source to receive changes in the amount of light transmitted through the falling particle flux, thereby detecting different-color particles.

In other words, in the detection of transparent colored grains or speckled colored particles mixed in polished rice, and colored grains mixed in particles that do not transmit light such as glutinous rice, Unusual colored particles cannot be detected unless a light-receiving element is arranged to receive the reflected light, and it is also possible to detect particles of different colors that are mixed in unpolished rice, regular white rice mixed in sticky rice, and colored rice mixed in brown rice. When detecting different colored particles such as grains,
The method using transmitted light, which has a large amount of change in received light, has excellent detection accuracy.

An example of a conventional color sorting machine is the JP-A-51-
The one published in No. 27568 is known, and this one is
Below the central part is a hole through which the grains pass, there is a background where the amount of light from the light source can be controlled freely by a controller, and above the hole through which the grains pass, there is a light source.
A sensor that receives the reflected light from the grains irradiated by the light source is provided, and an injector that is activated by the reaction of the sensor is provided behind the sensor. By this configuration, the amount of reflected light from the grains and the background can be adjusted. The amount of light is matched by the controller, and the sensor does not activate when a normal grain passes through the passage hole, but the sensor reacts to the reflected light of the discolored grain, which differs from the background light amount. It has the function of transmitting the reaction to the injector to select and eliminate non-standard grains.

However, this technology does not have a means for selectively using reflected light and transmitted light to make the sensor respond optimally to each of the various non-standard grains, and the user's selection function is not provided. Improvements were requested in terms of satisfying the following.

In addition, the reflected light and the transmitted light are each individually detected by a light receiving element, and the light receiving signal value detected by each photoelectric element is compared with a reference value provided in an individual comparator, and either one of the light receiving elements is detected. A method of detecting defective rice grains by detecting defective rice using a signal output from a comparator is known as Japanese Patent Application Laid-open No. 78191/1983.

This technology can detect defective rice even if one side of the rice grain is defective, or even if the surface of the rice grain is normal but the defective part is only inside the grain. However, this device also does not have a means for adjusting the light intensity of the projector through which the photoelectric element receives reflected light and transmitted light, and the amount of transmitted light can be adjusted to increase or decrease in response to particles of various shapes of different colors. death,
There were some improvements to be made in the ability to screen and separate defective rice with high precision.

For the purpose of improving the above-mentioned problems, the present applicant, dated October 4, 1978, prior to the filing of this application,
According to Japanese Patent Application No. 129028/1984, a plurality of light sources and light receiving elements provided facing the falling locus of particles mixed with different colors are connected via a control circuit to an injection nozzle device below them, The present application has been filed for an illumination device for a color sorter, in which a light projection regulating plate for adjusting the direction or amount of light emitted from the light source is removably attached to the transparent wall surface of a pair of light source containers containing light sources.

With the above configuration, the device of this application uses a pair of light source containers when sorting glutinous rice with white opaque grains mixed in non-glutinous rice, or sake rice with some opaque parts mixed in non-glutinous rice. Detects glutinous rice and sake rice mixed in non-glutinous rice using multiple light-receiving elements using reflected light and transmitted light without installing a light-transmitting regulation plate, and also detects the transparency of white opaque grains mixed in glutinous rice. Non-glutinous white rice with
Alternatively, when sorting translucent non-glutinous rice mixed in sake rice with opaque shinpaku and colored grains mixed in brown rice, a translucent control is applied to each of the pair of light source containers. Attach a plate so that the light-receiving element receives and detects the above-mentioned particles by transmitting the illumination light from the light source, and if necessary, completely block the light-transmitting wall surface of the light source container. By reducing the amount of transmitted light, the amount of light irradiated by the light source is adjusted as appropriate in accordance with the supplied particles containing different color grains. However, with this method, it is necessary to attach and detach the light-transmitting regulating plate every time the particles mixed with different colors supplied to the color sorter are changed, and this operation is troublesome and requires manpower.

[Purpose of the invention]

The present invention has been devised in view of the above-mentioned problems, and corresponds to the particles mixed with different colors supplied to the downflow gutter, and adjusts the irradiation light of the light source to increase or decrease as appropriate to increase or decrease the amount of light received by the light receiving element. Switch to reflected light or transmitted light,
It is an object of the present invention to provide a light amount adjustment device for a color sorter that can improve the detection accuracy of a light receiving element that detects different color particles and can adjust the light amount of a light source with a simple operation.

[Means for solving problems]

In a color sorter, a spray nozzle device is provided around a flow locus formed in a space between a gutter end of a flow gutter and a bran collector cylinder, connected to a light amount detection device consisting of a light source, a light receiving element, and a reference color plate. The problem is solved by arranging the light sources of the photoelectric detection device at opposing positions centering on the falling trajectory, and connecting each of the light sources with a light amount adjustment device that adjusts the amount of light to increase or decrease. It was used as a means.

[Embodiments of the invention]

Embodiments of the present invention will be described with reference to illustrative figures. In FIGS. 1 and 2, reference numeral 1 denotes a sorting machine frame, and a vibrating grain feeder 3 with a vibrating device 2 is installed on the upper part of the machine frame 1, and a supply hopper 4 is installed on the supply side. A falling gutter 5 connected in a dogleg shape is installed on the discharge side to form a grain flow path, and a light source 6 and A photoelectric sorting chamber 1 is equipped with a photoelectric detection device 9 consisting of a light receiving element 7 and a reference color plate 8, and an injection nozzle device 10 that operates in communication with the detection device 9.
1, a photoelectric detection device 9 and an injection nozzle device 1
0 in relation to and electrically connected to the control circuit 12, an outlet 13 for different color grains is provided at the bottom of the photoelectric sorting chamber 11, and a grain collecting cylinder for grading is provided on the extension line of the flow trajectory A. 14 is provided and is fitted and fixed to the wall of the sorting chamber 11.

Next, a configuration for increasing or decreasing the amount of light from the light source in the photoelectric sorting chamber 11 will be explained. The photoelectric detection device 9 is provided with a plurality of light sources 6A, 6B, 6C, 6D, and each light source 6 is arranged at opposing positions (transmitted light side B and reflected light side C) with the falling locus A as the center. In addition, each light source 6 is provided with a light amount adjustment device 15 that increases or decreases the amount of light.

In the one shown in FIG. 2, each light source 6 is replaced by a fluorescent lamp 16.
The light sources 6A and 6B on the transmitted light side B are respectively composed of a plurality of fluorescent lamps 16 and 16.
Each fluorescent lamp is formed so as to be blinked by a light amount adjustment device 15A.

The effects of the above configuration will be explained below. The mixed particles of different colors of the raw material flowing down from the supply hopper 4 to the vibrating grain feeder 3 flow down into the lower flow gutter 5 due to the vibration action of the vibrating grain feeder 3, and are transferred to the photoelectric sorting chamber 1.
1 in a flight-like manner along a predetermined flow trajectory A. In the photoelectric sorting chamber 11, the difference between the amount of light reflected by the different color particles and the amount of light from the reference color plate 8 is detected by the light receiving element 7, and the injection nozzle device 10 is actuated based on the detection signal. The different color particles are released from the flow path A by the action of the jet, and the separated particles flow down from the outlet 13 and are removed, and the regular particles flow out along the flow path A. The grains are directly taken out of the machine via the grain collecting cylinder 14 and sent to the next process.

In the above injection sorting process, when sorting glutinous rice with white opaque grains mixed in non-glutinous rice, or sake rice with some opaque parts mixed in,
By operating the light amount adjustment device 15A, the fluorescent lamps 16 of the light sources 6C and 6D are turned on, and at the same time, the light sources 6A and 6B are turned on.
The fluorescent lamps 16... are turned off, and the light receiving element 7 receives the reflected light side C of the light irradiated by the light sources 6A and 6B onto the particles mixed with different color particles flowing down the falling trajectory. The injection nozzle device 10 is actuated by the output signal of the control circuit that transmitted the detection signal, and the unique color particles are separated from the falling trajectory A by the jet action and are directed to the discharge port. 13 and is ejected from the plane.

Transparent non-glutinous white rice mixed into glutinous rice with white opaque grains, transparent non-glutinous rice mixed into sake rice with opaque shinpaku, and colored rice mixed into brown rice. When sorting grains, etc., the light amount adjustment device 15A is operated to turn on each of the fluorescent lamps 16 of the light sources 6A, 6B, 6C, 6D, and the amount of light on the transmitted light side B is doubled and the amount of light on the reflected light side C is doubled. When a difference in the amount of light occurs, the light receiving element 7 detects the difference between the amount of transmitted light and the amount of reflected light from the reference color plate 8, and sends a detection signal of the different color particles to the control circuit to control the injection nozzle device described above. 10 will be activated.

Moreover, what is shown in FIG. 3 includes light sources 6A, 6B,
6C and 6D are constituted by incandescent light bulbs 17, and the voltage of the incandescent light bulbs 17 is increased or decreased by a light amount adjustment device 15B to adjust the amount of light.

In this embodiment, the voltage of the incandescent bulbs 17 on the transmitted light side B is increased by operating the light amount adjustment device 15B,
Furthermore, when the voltage of the incandescent light bulbs 17 on the reflected light side C is decreased, the light rays from the incandescent light bulbs 17 on the transmitted light side B enter and pass through the particle bundle flowing down along the flow locus A, and the light beams of the incandescent light bulbs 17 on the transmitted light side B are transmitted. This method separates out different colored particles in the same way as the jet sorting action.

〔Effect of the invention〕

As explained above, according to the present invention, the irradiation light of the light source formed on the falling trajectory is increased or decreased by the light amount adjustment device, and the irradiation of the light source is Since the light-receiving element receives either reflected light or transmitted light, the detection accuracy of particles containing different color particles detected by the light-receiving element is improved, and it is also possible to use both reflected light and transmitted light. In addition, a remarkable effect is achieved in that the light amount of the light source can be adjusted by a simple operation.

[Brief explanation of drawings]

The drawings are illustrations of embodiments of the present invention. Figure 1 is a side sectional view of this device, Figure 2 is a sectional view of its main parts, and Figure 3 is a sectional view of the main parts.
The figure is a sectional view of a main part of another embodiment. 1... Sorting machine frame, 2... Vibrating device, 3... Vibrating grain feeder, 4... Supply hopper, 5... Downflow gutter,
6, 6A, 6B, 6C, 6D... light source, 7... light receiving element, 8... reference color plate, 9... photoelectric detection device,
10... Injection nozzle device, 11... Photoelectric sorting chamber,
12...Control circuit, 13...Discharge port for different colored grains, 1
4... Grain collection tube for grading, 15, 15A, 15B...
Light amount adjustment device, 16...Fluorescent lamp, 17...Incandescent light bulb, A...Downward trajectory, B...Transmitted light side, C...Reflected light side.

Claims (1)

[Claims of Claims] 1. A light source and a light-receiving element are installed around the flow path formed in the space between the end of the flow gutter that supplies particles mixed with different color grains and the grain collection tube that receives the particles and discharges them outside the machine. A color sorter is provided with an injection nozzle device connected to a light amount detection device consisting of a reference color plate and a reference color plate, in which the light sources of the photoelectric detection device are respectively disposed at opposing positions centering on the flow trajectory, and 1. A light amount adjustment device for a color sorter, characterized in that a light amount adjustment device for increasing or decreasing the amount of light is connected to a light source. 2. Color selection according to claim 1, wherein the light source is formed into a plurality of fluorescent lamps, and only the fluorescent lamp disposed on the opposite side of the light receiving element is formed to be blinkable via the light amount adjustment device. Machine's light intensity adjustment device. 3. The color according to claim 1, wherein the light source is formed as a plurality of incandescent light bulbs, and the light amount can be increased or decreased by adjusting the voltage of the plurality of incandescent light bulbs via the light amount adjustment device. Light intensity adjustment device for sorting machine.