JP5365968B2 - Belt type optical sorter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a belt-type optical sorter which simplifies an optical detecting means and deteriorate no sorting performance even employing as raw materials beans such as wet peanuts containing oil and fat. <P>SOLUTION: In the belt-type optical sorter 1, since water drops on the surface of a background part 13 (a transparent cylindrical body 14) constantly rotated by a gear motor 25 are scraped and cleaned after being washed by high-pressure water with a cylindrical cleaning part 28 consisting of a water jetting water nozzle 29 and a wiper blade 30 successively disposed in the rotational direction thereof, an upper surface part 14b irradiating a CCD camera 12 with background light is constantly kept clean in the transparent cylindrical body 14, thereby the clean background light being emitted to the CCD camera 12 and sorting accuracy being kept good. Then since a fluorescent 15 is disposed inside the transparent cylindrical body 14 in the constitution of the background part 13, the constitution of the optical detecting means 10 can be simplified. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a belt-type optical sorter that optically discriminates and sorts defective products mixed in raw material granular materials, and in particular, wet raw material granular materials (for example, various beans such as peanuts). The present invention relates to an optical detection means of a so-called wet type optical sorter.

  Conventionally, this type of belt-type optical sorter, as disclosed in, for example, Patent Document 1, conveys raw material granular materials (square-cut vegetables) by a belt conveyor and discharges them to an optical detection means. In the means, it is known that the cut vegetables are irradiated with light, the reflected light is received, defective products are discriminated based on the detected light, and the blast is selected. The optical detection means is provided with each irradiation device for irradiating light from above and below the optical detection position around the optical detection position on the fall trajectory from which the cut vegetables are emitted, and Each light receiving sensor for receiving reflected light from the cut vegetables at the optical detection position from above and below is provided.

By the way, the irradiation device on the lower side at the optical detection position is formed of a transparent cylindrical body in which a fluorescent lamp is disposed. On the surface of the transparent cylindrical body, defective products in the raw material granular materials are detected by the optical detection means. Thin flakes (flakes) generated when the blast is selected fall and adhere. For this reason, the structure which cleans this thin piece is provided. In this cleaning structure, the transparent cylindrical body is rotated in a state where the lower part of the transparent cylindrical body is immersed in the water tank, and the thin piece adhering to the surface of the transparent cylindrical body at the front and back positions immersed in the water tank (water) is cleaned. (Scraper) to remove, thereby cleaning the surface of the transparent cylindrical body.
JP-A-10-202206

By the way, in the belt-type optical sorter, for example, when processing peanuts, the raw peanuts are moistened after immersion in warm water and used as raw materials, and the thin skin mixed in the wet peanut raw materials remains on the surface. When selecting peanuts (defective products), there were the following problems. That is, when the wet peanut is used as a raw material, when the wet peanut is transported by the belt conveyor, the peel remaining on the surface of the peanut is peeled off and released from the end of the belt conveyor, and the optical It falls and adheres to the surface of the irradiation device (transparent cylindrical body) below the detection position. At that time, according to the cleaning structure, when the skin adhering to the surface of the transparent cylindrical body is wiped off with the cleaning body (scraper), the fat and oil contained in the peanut skin is removed during the wiping. Will adhere to the surface of the transparent cylinder, and even if the adhered oil and fat passes through the water tank (underwater) and is wiped off with another scraper, the water in the water tank will remain in the oil and fat during continuous operation. The surface of the transparent cylindrical body cannot be completely removed by cleaning because of the remaining skin and the like. In addition, when the oil is seized on the surface of the transparent cylindrical body, the surface of the transparent cylindrical body is clouded with oil and fat and the background light changes color, etc. May not be able to be irradiated, and there is a concern of affecting the sorting performance. For this reason, in order to avoid the concern, it was necessary to periodically stop the sorting operation and perform a cleaning operation to wipe off the oil and fat adhering to the surface of the transparent cylindrical body.
On the other hand, the optical detection means in the belt-type optical sorter requires a fluorescent lamp for adjusting the brightness of the background plate. Therefore, development of a simplified optical detection means that does not require this is also desired. Yes.
In view of the above problems, the present invention provides a belt-type optical sorter that simplifies the optical detection means and that does not deteriorate the sorting performance even when beans such as wet peanuts containing fats and oils are used as raw materials. It is a technical issue to provide.

In order to solve the above problem, according to claim 1,
A belt conveyor for transporting wet legume granular material;
An irradiation unit for irradiating light to an optical detection position on a fall locus of the raw material granular material conveyed / discharged by the belt conveyor, a light receiving sensor unit for receiving reflected light from the raw material granular material at the optical detection position, and the light reception Optical detection means comprising a background portion at the optical detection position of the sensor portion;
Discriminating means for discriminating a granular material to be selected based on received light data received by the light receiving sensor unit;
Defective product sorting means for sorting the granular material to be sorted based on the sorting signal from the discriminating means while being arranged on the downstream side of the position where the optical detection means is provided in the fall locus,
In the belt type optical sorter equipped with
The light receiving sensor portion and the background portion are provided with the light receiving sensor portion facing upward and the light receiving sensor portion facing downward with the optical detection position on the falling locus of the raw material granular material as the center,
The background portion has a transparent cylindrical body provided with a fluorescent lamp inside and a rotation drive member that rotates the transparent cylindrical body toward the falling direction of the falling locus, and on the outer periphery of the transparent cylindrical body. The transparent cylinder includes a fountain nozzle that sprays high-pressure water over the longitudinal direction of the transparent cylinder and a cleaning body that contacts the surface of the transparent cylinder and cleans the surface of the transparent cylinder along the longitudinal direction. A technical means is provided in which a cylindrical body cleaning portion is sequentially arranged in the order of the fountain nozzle and the cleaning body along the rotation direction side of the transparent cylindrical body from the upper surface portion of the body .

According to claim 2,
The background portion may be provided with an air ventilation portion for allowing air to flow through the transparent cylindrical body.

Delete

  According to the belt type optical sorter of the present invention, a fountain nozzle in which the surface of a background portion (transparent cylindrical body) that is always rotated by a rotation drive member (gear motor) is sequentially arranged along the rotation direction; Since the cylindrical body cleaning unit composed of a cleaning body (wiper blade) performs wiping cleaning such as water droplets after washing with high-pressure water, the upper surface part that emits background light to the light receiving sensor unit (CCD camera) in the transparent cylindrical body Since it is always kept in a clean state in which the skin of bean raw materials containing oils and fats, water droplets after washing, etc. are not attached, a good background light can be emitted to the CCD camera. For this reason, the light receiving sensor unit and the discriminating means do not erroneously discriminate the granular material (for example, defective product) to be sorted by optically detecting the skin and water droplets, and the sorting accuracy can be kept good. Further, it is not necessary to wipe the surface of the transparent cylinder after stopping the sorting operation. Further, since the background portion allows air to pass through the transparent cylindrical body, the occurrence of condensation in the transparent cylindrical body can be prevented, and thereby, good background light can be emitted.

  In the optical detection means of the present invention, since the background portion is configured such that the fluorescent lamp is disposed inside the transparent cylindrical body, a conventional fluorescent lamp for adjusting the brightness of the background plate is used. There is no need for it, and it is simplified.

  As for the belt type optical sorter 1 of the present invention, FIG. 1 shows an overall perspective view of its front side, and FIG. 2 shows an overall perspective view of its rear side. FIG. 3 is an AA. A cross-sectional view is shown.

  The belt type optical sorter 1 is suitable for sorting various legume raw materials (peanuts, almonds, soybeans, red beans, major dead, Kinki, etc.) having oils and fats. For example, when processing peanuts, we use wet peanuts that have been moulted after hot water immersion in the peeling process of peeling the thin skin (hereinafter referred to as “skin”) on the surface of the peanuts, and mix in the wet peanut ingredients. The belt type optical sorter 1 may be used when optically discriminating and sorting the peanuts with the skin remaining on the surface. In the following examples, an example using the above-mentioned wet peanut as a raw material will be described. The granular material to be selected is peanut with the skin remaining on the surface (hereinafter referred to as “defective product”). The non-defective product is peanut with no skin remaining on the surface.

  The belt type optical sorter 1 includes a vibrating conveyor 2 that conveys the wet peanut raw material while dewatering, and an optical sorting main body 3 that optically sorts defective products in the peanut raw material.

Vibrating conveyor 2:
The vibration conveyor 2 constitutes a draining tank 4 in which a draining perforated plate 4a provided with a large number of draining holes is disposed substantially horizontally, and vibrates the draining tank 4 to convey the material while draining the material. A support member 5 a that supports the motor 5 and the lower surface of the draining tank 4 is configured. An operation panel 6 of the vibration conveyor 2 is formed on the side surface of the vibration conveyor 2. Further, the drained porous plate 4a is fixed in the draining tank 4 by a plurality of clamps 7 and presser square members 8 so that the drained porous plate 4a can be removed during cleaning by washing with water or the like. In addition, the bottom surface 4b of the draining tank 4 is inclined toward one side, and a drain port 4c is provided in the inclined lower part.

Optical sorting main unit 3:
The optical sorting main body 3 is provided with a belt conveyor 9 for conveying the raw peanuts in a substantially horizontal shape, and the upstream side of the belt conveyor 9 is connected to the discharge portion 4d of the draining tank 4. An optical detection means 10 is disposed in the vicinity of the end of the belt conveyor 9 on the downstream side of conveyance.

  The belt conveyor 9 has an endless belt 9a having a flat surface and an arbitrary width. The endless belt 9a is bridged between a pair of rotating rollers 9b and 9b, and one of the rotating rollers 9b and 9b is illustrated. It is connected to the motor drive unit that does not, and is on the rotational drive side. As described above, the conveyance upstream side of the belt conveyor 9 is disposed below the discharge portion 4 d of the draining tank 4.

  In addition, a raw material stabilization roller 9c for the supplied peanut raw material is disposed at the upper surface position in the vicinity of the conveying upstream end of the belt conveyor 9. The raw material stabilizing roller 9c constitutes a rotating roller member 9d made of a soft material having cushioning properties. The rotating roller member 9d has a width substantially equal to the width of the endless belt 9a, and is disposed so as to have an arbitrary interval between the endless belt 9a. The arbitrary interval is at least larger than the thickness of the peanut. The rotating roller member 9d is connected to a motor drive unit (not shown) so that the rotation direction is the traveling direction of the endless belt 9a, and the rotation speed is also equal to the conveyance speed of the endless belt 9a. . With this configuration, the peanut raw material that is supplied from the discharge portion 4d onto the endless belt 9a and jumps on the endless belt 9a is prevented from jumping when passing under the rotating roller member 9d, and thus the peanut raw material jumps on the endless belt 9a. It is conveyed to the optical detection means 10 in a stabilized state. Thereby, when a peanut raw material is discharge | released from the edge part 9e of the said belt conveyor 9, the fall locus | trajectory of each peanut is stabilized and optical detection becomes favorable.

  As shown in FIG. 4, the optical detection means 10 has an irradiation unit on the upper side of the optical detection position P around the optical detection position P on the falling locus L of the raw material from the end 9 e on the downstream side of the conveyance. 11 and the light receiving sensor unit 12, and the background unit 13 is disposed below the optical detection position P.

  The irradiation unit 11 has a transparent cylindrical body 11a disposed horizontally at an upper position perpendicular to the optical detection position P with respect to the falling direction of the falling locus L, and a white fluorescent lamp is provided inside the transparent cylindrical body 11a. 11b, and is arranged so as to irradiate the optical detection position P with light. In addition, the said irradiation part 11 is arranged in parallel, and both arrange | position with the space | interval 11c which only passes the detection optical path (optical axis) 12a of the light-receiving sensor part 12 mentioned later.

  The background portion 13 is disposed at a position below the optical detection position P. The background unit 13 has substantially the same configuration as the irradiation unit 11, and a transparent cylindrical body 14 is horizontally disposed at a lower position perpendicular to the optical detection position P, and white fluorescent light is formed inside the transparent cylindrical body 14. The lamp 15 is configured and disposed so as to irradiate the optical detection position P with background light.

  As shown in FIG. 1, the irradiation unit 11 and the background unit 13 are connected to the fluorescent lamps through the through holes of the end covers 16 and 17 of the transparent cylindrical body 11a and the transparent cylindrical body 14, respectively. 11b, 15 is connected to the power supply section (see the side longitudinal sectional view of the background section 13 in FIG. 5). Further, the transparent cylinders 11a, 14 are provided with vent holes 19 in the end covers 16, 17 so that air is constantly passed through the transparent cylinders 11a, 14 to prevent internal condensation. An air supply pipe 20 is connected to the vent hole 19 (see FIGS. 1 and 5). The air supplied from the air supply pipe 20 to the inside of the transparent cylindrical bodies 11a, 14 is passed through the inner surface side of a cylinder 14a (described later) through a gap between fixing members (described later), and the end covers 21 on the other side. The air is exhausted from an exhaust hole 23 provided in 22 (see FIGS. 2 and 5).

  Incidentally, the transparent cylindrical body 14 in the background portion 13 is rotatable by a rotation driving member. More specifically, with respect to the transparent cylindrical body 14, the transparent cylindrical body 14a, the end cover 21 and the support ring 23 that support the cylindrical body 14a at both ends are integrally configured, and the transparent Bearings 24 and 24 are disposed at both ends of a fixing member (consisting of a fluorescent lamp 15 and fluorescent lamp holding members 15a and 15b) inside the cylindrical body 14 so as to be rotatable. On the other hand, a gear motor 25 including a reduction gear box 25a and a motor portion 25b is disposed at a side position of the end cover 21 as the rotation driving member. The rotation output shaft 25 c protruding from the reduction gear box 25 a is fitted into a fitting recess 26 provided on the side surface of the end cover 21, and the rotation output from the motor portion 25 b is transmitted to the transparent cylindrical body 14. It is like that.

  The direction of rotation of the transparent cylindrical body 14 by the gear motor 25 is the drop direction side of the drop locus L as indicated by the arrow in FIG. The reason for this rotation direction is that the peanut peel or peanut crushed particles mixed in the peanut raw material and falling along the falling locus L are the upper surface portion that emits background light to the CCD camera 12 in the transparent cylindrical body 14. This is because the peanut skin or the like is not transported in the direction of the upper surface portion and is cleaned by a later-described injection nozzle 29 or the like because it drops and adheres to the dropping direction side (air nozzle 31 side) from 14b. The background portion 13 is mounted on the machine frame 27 at the left and right end portions and in the vicinity thereof (see FIG. 5).

  Further, a cylindrical body cleaning portion 28 for cleaning the surface of the transparent cylindrical body 14 is disposed at a side surface position of the transparent cylindrical body 14 in the background portion 13. The cylindrical body cleaning unit 28 includes a fountain nozzle 29 and a wiper blade (cleaning body) 30. A plurality of the fountain nozzles 29 are disposed along the longitudinal direction so as to spray high-pressure water onto the surface of the cylindrical body 14a, and the peanut skin K adhering to the surface of the cylindrical body 14a is washed away by the fountain. It is like that. The wiper blade 30 is disposed so as to be in pressure contact with the surface of the cylindrical body 14a along the longitudinal direction of the cylindrical body 14a so as to wipe off the water adhering to the surface of the cylindrical body 14a with the fountain from the fountain nozzle 29. It is configured. About the position which provides the said fountain nozzle 29 and the wiper blade 30, it is good to arrange | position sequentially along the rotation direction (falling direction side of the said fall locus | trajectory L) of the said transparent cylindrical body 14 in the cylinder 14a surface. In addition, below the fountain nozzle 29 and the wiper blade 30 are disposed the skin that has been washed away and the outside discharge port 28a of the washing water.

  As described above, the light receiving sensor unit 12 is disposed above the optical detection position P and further above the irradiation units 11 and 11. The light receiving sensor unit 12 is a CCD camera 12 having a built-in CCD color line sensor 12b, and receives the reflected light of the peanut raw material at the optical detection position P in color (RGB). The CCD camera (light receiving sensor unit) 12 has a background optical unit 13 through which the detection optical path (optical axis) 12a of the CCD camera 12 passes through the gap 11c between the irradiation units 11 and 11 and the optical detection position P. So as to receive the reflected light and the background light of the peanut raw material. A condensing lens 12c is built in the CCD camera 12 so that reflected light from an arbitrary width in the longitudinal direction of the optical detection position P can be received.

Defective product selection means 31:
In the drop locus L, a defective product sorting means 31 for sorting defective products is arranged on the side of the drop direction from the optical detection position P. The defective product selection means 31 is an air nozzle 31 that blows high-pressure air. The air nozzle 31 includes a plurality of air outlets arranged in parallel in a direction perpendicular to the drop locus L, and each air outlet 31 has a high pressure via an electromagnetic on-off valve (hereinafter referred to as “electromagnetic valve”). Connected to air source. Each of the solenoid valves is connected to an ejector valve drive circuit 40 described later, and is opened and closed based on a selection signal from the ejector valve drive circuit 40 to blow high-pressure air from a jet port. In the fall locus L, a defective product storage portion 32 and a non-defective product storage portion 33 are sequentially arranged further downstream from the position where the defective product selection means 31 is provided. The defective product accommodating portion 32 and the non-defective product accommodating portion 33 suspend net members 32a and 33a that absorb shocks when accommodating the dropped peanuts on the respective inner side surfaces. The lower ends of the net members 32a and 33a are fixed with arbitrary members so as not to hang.

  Next, an example of the discriminating means 34 for discriminating the granular material (defective product) to be selected based on the light receiving data of the peanut raw material received by the CCD camera 12 will be described. As shown in FIG. 6, the determination means 34 is centered on a central processing unit (CPU) 35, which includes a read-only storage unit (ROM) 36, a read / write dedicated storage unit (RAM) 37, and an input / output circuit. (I / O) 38 and 39 are connected to each other. The I / O 39 is connected to the CCD camera 12 (CCD color line sensor 12b). On the other hand, the I / O 38 is connected to the ejector valve drive circuit 40. The ejector valve drive circuit 40 is connected to the defective product selection means 31 (electromagnetic valve), and opens and closes an arbitrary electromagnetic valve based on a defective product selection signal from the CPU 35. In the ROM 36, a determination threshold value for determining whether the light reception data (pixel unit) of the peanut raw material received by the CCD camera 12 is a non-defective product or a defective product is set in advance. Pass / fail is judged using the threshold value.

  The discriminating means 34 and the CCD camera 12 are surrounded by a sealing cover 42 and are waterproof, so that water does not enter when the belt conveyor 9 or the background portion 13 is washed with water. In addition, the transparent cylindrical body 11a, 11a, 14 and the end cover 16, 17, 21, and the end part cover 16, 17 and 21, so that water does not enter the fluorescent lamps 11b, 11c, and 15 with respect to the irradiation part 11 and the background part 13 as well. The power cord 18 is also provided with a waterproof cover. An opening / closing lid 43 is provided on a side surface of the sealing cover 42, and an operation monitor (display unit) 41 for the optical sorting main body 3 is provided inside the opening / closing lid 43.

  Next, the operation of the belt type optical sorter 1 will be described.

  When the wet peanut raw material is supplied to the upstream side of the draining tank 4 in the vibrating conveyor 2, the wet peanut raw material spreads on the drained porous plate 4a and receives the vibration action by the vibration motor 5 to receive the drained porous plate 4a. It is conveyed while being drained and drained, and is supplied from the discharge part 4d to the upstream side of conveyance of the belt conveyor 9 (endless belt 9a).

  When the peanut raw material supplied to the upstream side of conveyance of the belt conveyor 9 (endless belt 9a) is sequentially conveyed in the downstream direction, it is in the same direction as the conveyance direction of the endless belt 9a and at the same conveyance speed. The rotating roller member 9b passes below the rotating roller member 9b. As a result, the peanut raw material enters a stopped state in which jumping and rolling on the endless belt 9a are prevented, and is stably conveyed to the optical detection means 10.

  Next, each peanut raw material is discharged from the end 9 e of the belt conveyor 9 and falls while drawing a parabolic drop locus L. Each falling peanut raw material receives irradiation light from the irradiation units 11 and 11 at the optical detection position P, while the CCD camera 12 (CCD color line sensor 12b) receives the irradiation light from the peanut raw material. The reflected light is scanned and imaged (received) along the longitudinal direction of the optical detection position P.

  The received light data (pixel information) captured by the CCD camera 12 is sent to the discrimination means 34. In the discriminating means 34, the received light data (pixel information) enters the CPU 35 via the I / O 39, and the CPU 35 determines whether the received light data is good or bad. The CPU 35 compares the determination threshold value stored in the ROM 36 with the RGB (color) light amount for each pixel unit of the received light data, and determines whether each pixel information is defective or not. The defective pixels thus obtained are sequentially stored in the RAM 37.

  When the CPU 35 detects that there are a plurality of defective product pixels stored in the RAM 37 in succession, the CPU 35 drives the ejector valve drive through the I / O 38 to select a signal for driving the electromagnetic valve corresponding to the defective product pixel. Output to the circuit 40. The ejector valve drive circuit 40 outputs a drive signal for driving the solenoid valve based on the selection signal to the solenoid valve after an arbitrary delay time has elapsed, and opens and closes the valve. High pressure air is blown from the air nozzle 31). The jetted high-pressure air comes into contact with the defective product on the drop locus L, and the defective product F is stored in the defective product storage section 32. On the other hand, the non-defective product R falls along the falling locus L and is accommodated in the non-defective product accommodating portion 33.

  The characteristic action in the present invention will be described.

  The peanut raw material released from the end portion 9e of the belt conveyor 9 is mixed with wet skin K (thin skin on the surface of the peanut) peeled off from the peanut during conveyance on the belt conveyor 9. Since the wet skin K does not fall along the fall locus L but falls and adheres to the transparent cylindrical body 14 in the background portion 13, the present invention cleans this by the cylindrical body cleaning portion 28. Remove. That is, the transparent cylindrical body 14 is always rotated by the rotational output of the gear motor 25, and the skin K attached to the transparent cylindrical body 14 is transparent cylinder by the high-pressure water W that is constantly ejected from the blast nozzle 29. It is washed off from the surface of the body 14. Thereafter, the transparent cylindrical body 14 further rotates, and the water droplets W due to the high-pressure water adhering to the surface of the transparent cylindrical body 14 are wiped off by the wiper blade (cleaning body) 30. In addition, since the cylinder cleaning part 28 in the present invention does not wipe off the skin K with the wiper blade (cleaning body) 30, but wash it off with the high-pressure water, the wiper blade (cleaning body) 30 contains oil and fat. When the skin K is wiped, the oil and fat is not adhered to or remains on the transparent cylindrical body 14, and the quality of the background light emitted to the CCD camera 12 does not deteriorate.

  As described above, the upper surface portion 14b that emits background light to the CCD camera 12 in the transparent cylindrical body 14 is always kept in a state in which the skin and water droplets are not attached. 34 is capable of optically detecting the skin and water droplets and not making a good / bad misjudgment and maintaining good sorting accuracy.

The whole front perspective view of the belt type optical sorter of the present invention is shown. An overall perspective view of the rear side of the belt type optical sorting is shown. AA in FIG. A cross-sectional view is shown. FIG. 4 shows a partially enlarged view in FIG. 3. The longitudinal cross-sectional view of a background part is shown. The block diagram of a discrimination means is shown.

DESCRIPTION OF SYMBOLS 1 Belt type optical sorter 2 Vibrating conveyor 3 Optical sorting main-body part 4 Water draining tank 4a Water draining perforated plate 4b Bottom face 4c Drain outlet 4d Discharge part 5 Vibration motor 5a Support member 6 Operation control panel 7 Clamp 8 Holding square 9 Belt conveyor 9a Endless belt 9b Rotating roller 9c Raw material stabilizing roller 9d Rotating roller member 9e End 10 Optical detection means 11 Irradiation unit 11a Transparent cylindrical body 11b Fluorescent lamp 11c Gap 12 CCD camera (light receiving sensor unit)
12a Detection optical path (optical axis)
12b CCD color line sensor 12c Condensing lens 13 Background portion 14 Transparent cylindrical body 14a Tube body 14b Upper surface portion 15 Fluorescent lamp 15a Fluorescent lamp holding member 16 End cover 17 End cover 18 Power cord 19 Ventilation hole (air ventilation section)
20 Air supply pipe (air ventilation part)
21 End cover 22 End cover 23 Exhaust hole (air ventilation part)
24 Bearing 25 Gear motor (Rotary drive member)
25a Reduction gear box 25b Motor unit 25c Rotation output shaft 26 Fitting recess 27 Machine frame 28 Cylindrical cleaning unit 28a Exhaust outlet 29 Fountain nozzle 30 Wiper blade (cleaning body)
31 Air nozzle (defective product sorting means)
32 Defective product storage portion 32a Net member 33 Non-defective product storage portion 33a Net member 34 Discriminating means 35 Central processing unit (CPU)
36 Read-only memory (ROM)
37 Read / write memory (RAM)
38 I / O circuit (I / O)
39 Input / output circuit (I / O)
40 Ejector valve drive circuit 41 Operation monitor (display unit)
42 Sealing cover F Defective product K Skin (Peanut skin)
L Drop locus P Optical detection position R Non-defective product W Water (high pressure water)

Claims (2)

A belt conveyor for transporting wet legume granular material;
An irradiation unit for irradiating light to an optical detection position on a fall locus of the raw material granular material conveyed / discharged by the belt conveyor, a light receiving sensor unit for receiving reflected light from the raw material granular material at the optical detection position, and the light reception Optical detection means comprising a background portion at the optical detection position of the sensor portion;
Discriminating means for discriminating a granular material to be selected based on received light data received by the light receiving sensor unit;
Defective product sorting means for sorting the granular material to be sorted based on the sorting signal from the discriminating means while being arranged on the downstream side of the position where the optical detection means is provided in the fall locus,
In the belt type optical sorter equipped with
The light receiving sensor portion and the background portion are provided with the light receiving sensor portion facing upward and the light receiving sensor portion facing downward with the optical detection position on the falling locus of the raw material granular material as the center,
The background portion has a transparent cylindrical body provided with a fluorescent lamp inside and a rotation drive member that rotates the transparent cylindrical body toward the falling direction of the falling locus, and on the outer periphery of the transparent cylindrical body. The transparent cylinder includes a fountain nozzle that sprays high-pressure water over the longitudinal direction of the transparent cylinder and a cleaning body that contacts the surface of the transparent cylinder and cleans the surface of the transparent cylinder along the longitudinal direction. A belt type optical sorter comprising a cylindrical body cleaning unit disposed in order of a fountain nozzle and a cleaning body from the upper surface of the body along the rotation direction of the transparent cylindrical body .   The belt-type optical sorter according to claim 1, wherein the background portion is provided with an air ventilation portion for allowing air to flow through the transparent cylindrical body.

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