JPS6283078A - Photoelectric detector for color selector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a photoelectric detection device for a color sorting device for sorting out and removing different colored particles mixed in granular materials such as grains, beans, and resin pellets.

Prior art and its problems This type of color sorting device is based on the background of the falling trajectory of the sorted particles (
Background) is a wall surface of the same color as normal particles,
The particles mixed with different color particles flowing down the above-mentioned flowing trajectory are illuminated, and the reflected light or transmitted light is received by a light receiving element of a photoelectric detection device and inputted to a control device, and the injection nozzle device is actuated by the control signal. , the unusual particles are sorted out by removing them with a jet from the trajectory of normal particles.

In particular, for sorting particles mixed with different-colored rice from opaque materials such as beans, a photoelectric detection device is known that receives reflected light from three directions with the falling trajectory centered around the particle in order to detect the entire surface of the particle. However, the photoelectric detection device (Fig. 7).

FIG. 8) shows an opening 10 opening the flow trajectory 101.
A configuration in which a light receiving element 104 and a background 105 are respectively arranged and fixed in three directions centering on the flow locus 101 on a rectangular plate 103 provided with 2, and a plurality of the plates 103 are arranged in parallel. Therefore, there are problems in that the line arrangement area of the photoelectric detection device is enlarged, making the entire device large and the construction cost high.

OBJECTS OF THE INVENTION The present invention solves the problems of the conventional devices described above, reduces the line arrangement area of the photoelectric detection device, downsizes the entire device, and provides a photoelectric detection device for a color sorting device that performs effective color sorting. The purpose is to provide

Means for Solving the Problems The photoelectric detection device of the color sorting device of the present invention detects particles in the vicinity of the trajectory of particles mixed with different colored rice flowing down from the raw material supply section in an orderly manner.
In addition to providing a photoelectric sorting section equipped with a photoelectric detection device consisting of a light source, a light receiving element, and a background, and an injection nozzle device,
In a color sorting device in which a plurality of the photoelectric sorting sections are arranged in parallel, and the photoelectric sorting section detects and sorts out particles of a different color, each vertex of a triangle centered on the flowing trajectory is directed toward the flowing trajectory. The light-receiving elements are respectively provided, and the plurality of triangles are partially overlapped, and the light-receiving elements are arranged in horizontal rows.

A working light-receiving element is provided at each vertex of a triangle centered on the falling locus, and a plurality of triangles are overlapped to place the falling loci close to each other, thereby reducing the line arrangement area of the photoelectric detection device as much as possible. .

Embodiment An embodiment of the present invention will be explained based on FIGS. 1 to 6.

In FIGS. 3, 5, and 6, reference numeral 1 denotes a sorting machine frame, and a vibrating grain feeder 3 equipped with a vibrating device 2 is superimposed on the upper part of the machine frame 1, and a supply hopper is installed on the supply side of the machine frame 1. 4 is provided as a raw material supply section 5, and a downflow gutter 6 is provided in an inclined manner on the discharge side of the drainage gutter 3.
are mounted and connected, and a photoelectric sorting section 7 is provided at the lower end of the downflow gutter 6, and both side wall surfaces 8A, 8 of the photoelectric sorting section 7 are mounted and connected.
B is provided with photoelectric detection devices 9, 9, respectively, and within each photoelectric detection device 9, 9, a light receiving element 10. A light source 11 and a background 12 are respectively disposed, and an injection nozzle device 13 is provided opposite to the falling trajectory A of the grains in the photoelectric sorting section 7, so that the grains are fed by the vibration action and flow into the downflow gutter. A light source 11 irradiates the falling trajectory A of particles mixed with different-colored rice that has flowed down, and the light receiving element 10 receives the light amount difference between the reflected light of the mixed particles and the reflected light of the background 12, and the received light signal is The injection nozzle device 13 is configured to operate according to a signal from the control device 14 which inputs and detects different color particles,
Reference numeral 15 designates a different color grain discharge port provided at the bottom of the photoelectric sorting section 7, 16 designates a grain size adjustment discharge tube, and 17A and 17B designate machine frames that house photoelectric detection devices on the same wall side and are arranged in rows. Further, as shown in FIG. 5, a plurality of downflow troughs 5 are usually arranged in parallel in order to improve processing capacity, and FIG. 5 illustrates a 30-channel color sorting device.

Next, the photoelectric detection device 8 will be described in detail.
0 is characteristic, and at each vertex of a triangle centered on the downward trajectory A, there is a &f''C light receiving element 10 directed toward the downward trajectory A.
(1OA, 10B, 10C), firstly,
As shown in the figure, a plurality of triangles B1 made up of the light receiving elements 10
are disposed parallel to each other, partially overlapping in one circumferential direction within the same plane, and the backgrounds 12 corresponding to each light receiving element 10 are also disposed in a plane. Moreover, each light receiving element 10A, 10B.

10C is 120 so that the entire surface of the same particle can be detected.
It is set at an angle in degrees.

Further, as shown in FIGS. 2 and 4 showing another embodiment, the light receiving element 1
A plurality of triangles B2 formed from 0 are arranged three-dimensionally by partially overlapping in an inclined shape, and each background 12 corresponding to the light receiving element 1o is also arranged.

Next, the operation of the above embodiment will be explained.

The grains flow down from the opaque particles mixed with different colors into the vibrating grain feed gutter 3, further slide from the gutter 3 to the flow gutter 6 by the vibration device 2, and flow down inside the photoelectric sorting section 7 along a predetermined flow locus.

In the photoelectric sorting section 7, the mixed particles flowing down the flow locus A are irradiated from the light source 11, and the difference in light amount between the reflected light of the particles and the reflected light of the background 12 is detected from three directions on each of the light receiving elements 10A, 108 and 100 respectively receive the light and input it to the sleep control device 14, which detects different colored particles based on the difference in light intensity, and controls the injection nozzle device 13 based on the control signal.
to remove the different color particles from the falling trajectory A,
The particles of different colors are discharged from the discharge port 15, and the normal particles flow directly into the particle size discharge tube 16, are discharged outside the machine, and are entrusted to the next process.

Here, as shown in FIGS. 1 and 3, a plurality of light receiving elements 10
are arranged in the same plane, and the triangles B1 with each light receiving element 10 as the vertex and the falling trajectory A as the center are oriented in the same direction and partially overlapped, so that the light receiving elements 10 are arranged in horizontal rows on the same line. This arrangement enables integral installation and inspection, and allows the interval of the flow path A to be narrowed as much as possible. In addition, as another example, the arrangement of the light receiving elements 10 shown in FIGS. 2 and 4 is such that triangles B2 with the light receiving elements as the vertices and the falling locus A as the center are partially overlapped in an inclined manner to form a three-dimensional, parallel arrangement. Since the light receiving elements 10. The arrangement and mechanism of the background 12 are not restricted by the shape and size of the background 12, and the arrangement and configuration thereof are facilitated.

Effects of the Invention As described above, the present invention provides a photoelectric detection device for a color sorting device that can detect and remove defects on the surface of particles from three directions when sorting out different-colored particles from particles mixed with different colors in an opaque body. This has the following effects: while securing the sorting performance, the total area of the device can be reduced, maintenance and inspection can be made easier, the color sorting device as a whole can be downsized, and its component cost can be reduced.

[Brief explanation of drawings]

Figure 1 is a layout diagram of the light receiving element of this photoelectric detection device, Figure 2 is a layout diagram of the light receiving element of another embodiment, Figure 3 is a side sectional view of this device, and Figure 4 is also another embodiment. 5 is a front view of the present color sorting device, FIG. 6 is a side sectional view thereof, FIG. 7 is a plan view of a known photoelectric detection device, and FIG. 8 is a perspective view thereof. . 1... Sorting machine frame 2... Vibration device 3...
Vibrating grain feed trough 4... Supply hopper 5... Raw material supply section 6... Downflow trough 7... Photoelectric sorting section
8A, 8B...Side wall surface 9...Photoelectric detection device
10... Light receiving element 11... Light source 12.
...Background 13...Injection nozzle device 14.
... Control device 15 ... Unique color grain discharge port 16 ... Grain size adjustment discharge tube 17A, 17B ... Machine frame 101 ... Downward trajectory 102 ... Opening 103
... Rectangular plate body 104 ... Light receiving element 105 ...
・Background

Claims (4)

[Claims] (1) A photoelectric sorting section equipped with a photoelectric detection device consisting of a light source, a light-receiving element, and a background, and an injection nozzle device is provided near the trajectory of particles mixed with different colors that flow down in an orderly manner from the raw material supply section; In a color sorting device in which a plurality of sorting parts are arranged in parallel, and the photoelectric sorting part detects and sorts out particles of different colors, each vertex of a triangle centered on the flowing trajectory receives light toward the flowing trajectory. 1. A photoelectric detection device for a color sorting device, characterized in that each element is provided, a plurality of the triangles are partially overlapped, and the light-receiving elements are arranged in horizontal rows. (2) Claim No. 1 in which a plurality of triangles formed from the light-receiving elements are respectively arranged facing in the same direction.
) A photoelectric detection device for the color sorting device described in item 2. (3) A photoelectric detection device for a color sorting device according to claim (1), wherein a plurality of triangles formed from the light receiving elements are partially overlapped and arranged in parallel within the same plane. (4) A photoelectric detection device for a color sorting device according to claim (1), wherein a plurality of triangles formed from the light receiving elements are partially overlapped in an inclined manner and arranged in parallel.