JPS6354433B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a discharging device for an oscillating sorting plate.

A sorting plate with a rough surface is swung diagonally up and down, and a small friction is created on the shaking side while flowing the mixed grains of different color grains (for example, mixed grains of paddy and brown rice) supplied to any position on the sorting plate. A vibrating discharge gutter installed at the edge of the sorting plate is used to collect brown rice grain bundles with a high coefficient of friction and paddy grain bundles with a large friction coefficient on the opposite side, and flow a mixed grain bundle of paddy brown rice between them. flowing down to
Providing a movable and adjustable guide wall for separately introducing each of the particle bundles into each flow path in the discharge gutter,
A photoelectric detection device consisting of a light source and a light-receiving element is installed near the boundary between the brown rice grain bundle on the shaking side of the sorting board and the adjacent mixed grain bundle to detect the mixing ratio of different types of mixed grains based on the amount of light. In a discharge device that adjusts the outflow width of a grain bundle discharge port, a conventional photoelectric detection device that uses a light source in a specific infrared region to illuminate the grains of the grain bundle can detect the intensity of reflected light from green rice and paddy. Since the difference between the two is small, it is easy to make an error in the discrimination, which disturbs the detection accuracy and hinders accurate regulation of the outflow width.

In order to solve the above-mentioned drawbacks, the present invention provides a photoelectric detection device consisting of a light source and a light receiving element equipped with a plurality of light emitting diodes with different wavelength regions, and is arranged on the guide wall. Irradiating the grains of the grain bundle with a plurality of light beams in the range (infrared rays and visible light) and receiving the reflected light, increasing the difference in reflected light intensity between brown rice and paddy, and between paddy and green rice, respectively, By comparing or synthesizing the detection, it is possible to clarify the identification of foreign grains to be excluded and improve the detection accuracy, and also to accurately regulate the outflow width of each grain bundle using the inspection signal to produce high quality carefully selected grains. The aim is to develop and provide equipment that can reliably, smoothly, and quickly mass-produce.

To explain the present invention with reference to embodiment figures, reference numeral 1
is a sorting board with a rough surface that acts as a frictional resistance that can guide rice grains, and the sorting board 1 vibrates diagonally up and down.
A brown rice grain bundle P with a small friction coefficient is placed on the shaking side H while supplying unique grains, such as mixed grains of paddy and brown rice, in the outflow direction C lateral to the vibration direction AB.
In addition, rice grain bundles R with a large friction coefficient are concentrated on the opposite side L, and three types of grain bundles of mixed grains Q are placed between them.
The brown rice, paddy, and mixed grains are discharged from the sorting board 1 into the vibrating discharge gutter 3 provided at the end 2 of the board by guide walls 4 and 5 that adjust their movement along the end 2 of the board. Channels 6, 7, and 8 are configured to separately introduce the respective grain bundles. And the swinging side H
A light source 10 including a plurality of light emitting diodes 9A and 9B having different wavelength ranges is provided in a portion E where the rice grain bundle at the boundary D between the brown rice grain bundle P and the mixed grain bundle Q flows near the plate edge 2. , a photoelectric detection device 12 consisting of a light receiving element 11 for receiving the reflected light rays irradiated onto the grain from the light source 10 is provided on the guide wall 4 at an arbitrary correction interval, and the guide wall 4 is threaded. The light emitting diodes 9A or 9B are connected to a reciprocating device 15 consisting of a shaft 13 and a reciprocating electric motor 14, and each of the light emitting diodes 9A or 9B irradiates the grains flowing down inside the cylinder 16 of the photoelectric detection device 12 and measures the amount of reflected light. The light receiving element 11 receives the light, and the received light signal is transmitted through the control device 17 to rotate the electric motor 14 forward and backward, and the screw shaft 13 rotates forward and backward to move the guide wall 4 laterally for adjustment. It is formed in

The guide wall 4 provided at the end of the sorting board 1 is for accurately regulating the outflow width of the discharge port of the brown rice grain bundle P on the shaking side, so the reason for the brown rice grain bundle P to be described later is that Although the contamination of green rice is allowed, it is necessary to completely prevent the contamination of paddy, and the green rice is removed by a color sorter in the subsequent process or milled by a rice miller. It is something.

Next, with reference to FIG. 4, a description will be given of the state of change in each reflected light on paddy, brown rice, and green rice due to the light rays of each wavelength from the light source. In the figure, the vertical axis represents the reflected light intensity, and the horizontal axis represents the wavelength change of the light source.The solid waveform curve represents paddy, the dotted waveform curve represents brown rice, and the dashed-dotted waveform curve represents green rice. Conventional photoelectric detection devices operate in the infrared wavelength region (700 nm or more)
In the above, a light source with an arbitrary wavelength (for example, 940 nm) with a large difference in reflected light intensity between paddy and unpolished rice was installed and the light was irradiated, so as can be seen from the figure, the reflected light intensity a of paddy and the reflected light intensity c of polished rice are difference (a
-c) will be relatively large, but the difference (a-b) between the reflected light intensity a of paddy and the reflected light intensity b of green rice will be relatively small, and therefore the change in light amount between green rice and paddy will be It is unclear, and errors often occur in regulating the outflow width using the detection signal.

Therefore, the present invention focuses on visible light from 660nm to 700nm.
Since a light emitting diode 9A in a specific (red) wavelength region up to m and a light emitting diode 9B in the infrared region (700 nm or more) are provided respectively for irradiation,
When the grains are irradiated with visible light in the wavelength range from 660 nm to 700 nm, the difference a′−b′ between the reflected light intensity a′ of the paddy and the reflected light intensity c′ of the polished rice becomes slightly smaller. , the difference a'-c' between the reflected light intensity a' of paddy and the reflected light intensity b' of green rice becomes relatively large and is detected. Therefore, the light emitting diode 9
Data of each reflected light intensity a', b', c' by A, and each reflected light intensity a, irradiated with a light beam in an arbitrary wavelength range of 700 nm or more from the light emitting diode 9B.
By combining (or comparing) data b and c, it is possible to clearly distinguish between various types of grains, and the movement of the guide wall 4 can be adjusted accurately based on the detection signal. That is, when the light beams from the diodes 9A and 9B are irradiated and the reflected light intensities of paddy, brown rice, and green rice are combined equally, the average reflected light intensity of the paddy is a+a'/2=a ″, the same strength of green rice is b + b′/2 = b″, and the same strength of brown rice is c + c′/2 = c″, and as shown in a″, b″, and c″ on the diagram, brown rice c″ and The average reflected light intensities of green rice b'' are very close to each other, and at the same time they are far apart from the reflected light intensity a'' of paddy, making it possible to clearly identify the paddy. To easily and smoothly ensure a complete flux of brown rice (including green rice) without contamination of paddy by accurately adjusting the movement of the guide wall 4 to regulate the outflow width of the brown rice grain bundle at a discharge port part. Can be done.

In some cases, the reflected light intensities of paddy, brown rice, and green rice in each of the wavelength ranges are compared in a comparison circuit, and the movement of the guide wall 4 is adjusted based on the comparison signal. In this case, a plurality of the light-receiving elements 11 are provided to receive each reflected light, compare them, and generate a signal. Furthermore, the photoelectric detection device of the present invention, which is composed of a light source equipped with a plurality of light emitting diodes with different wavelength ranges and a light receiving element, can of course be used for general grain sorting in addition to mixed grains of unhulled brown rice. .

In this way, the discharging device for the oscillating sorting board of the present invention has the following features:
A plurality of light beams in different wavelength ranges are irradiated onto grains near the boundaries of various grain bundles discharged from a sorting plate, the reflected light is received, and the amount of each of the reflected light received is combined or compared to identify the The different colored grains (grains to be excluded) are accurately determined, and the mixing ratio (light amount) of the flowing mixed grain bundle of different colored grains is accurately detected and the guide wall is quickly moved. The outflow width of the outlet can be accurately regulated. In addition, the movement adjustment is simple and accurate, and safety is fully taken into consideration, making it possible to always smoothly mass-produce completely selected grains.

[Brief explanation of drawings]

The drawings are illustrations of embodiments of the present invention. Fig. 1 is a plan view of the sorting board, Fig. 2 is a partially enlarged sectional view of the main part of the sorting board, Fig. 3 is a partially enlarged plan view of the main part of the sorting board, and Fig. 4 is a partially enlarged plan view of the main part of the sorting board.
The figure shows the relationship between each wavelength and reflected light intensity for paddy, brown rice, and green rice. 1... Sorting board, 2... Board edge, 3... Vibration discharge gutter, 4, 5... Guide wall, 6, 7, 8... Outflow path,
9A, 9B... Light emitting diode, 10... Light source,
11... Light receiving element, 12... Photoelectric detection device, 13
... Spiral shaft, 14 ... Forward and reverse rotation electric motor, 15 ... Reciprocating device, 16 ... Cylindrical body, 17 ... Control device, P
...Brown rice grain bundle, Q...Mixed grain bundle, R...Paddy grain bundle.

Claims (1)

[Scope of Claims] 1. A sorting board with a rough surface is swung diagonally up and down, and while flowing mixed grains of different color grains supplied to an arbitrary position on the sorting board, a small coefficient of friction is created on the shaking side. Grain bundles and grain bundles with a large friction coefficient are concentrated on the swinging side of the grain bundles, and the mixed grain bundles are flowed between them and flowed down from the sorting board to a vibrating discharge gutter provided at the end of the board, A guide wall is provided in each flow path in the discharge gutter to separate and introduce each of the particle bundles, and a sorting device is provided with a reciprocating device connected to the guide wall, and the sorting device is provided with a plurality of light emitting diodes having different wavelength regions. A photoelectric detection device consisting of a light source and a light receiving element is provided, the detection device is arranged on the guide wall, and the grain is irradiated with light beams in a plurality of wavelength ranges emitted from the light source, and the reflected light is transmitted to the light receiving element. A discharging device for a swinging sorting board, which receives light by a oscillating sorting board, and moves and adjusts the guide wall based on the received light signal. 2. The discharging device for a oscillating sorting board according to claim 1, wherein the light source is comprised of a light emitting diode in the wavelength range from 660 nm to 700 nm and a light emitting diode in the wavelength range of 700 nm or more.