JP2013059718A - Dust collector for optical granular material-sorting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust collector for an optical granular material sorting apparatus, capable of suction-eliminating fine dust mixed in the non-defective article side as well as fine dust mixed in the defective article side.SOLUTION: The dust collector for the optical granular material sorting apparatus includes a dust collecting part 7 provided below a sorted article recovery part 6. The dust collecting part 7 includes a non-defective article side dust separating chute 71 partially formed of air permeable members 73a, 73b and communicating with the lower part of a non-defective article recovery chute 61; a defective article side dust separating chute 72 partially formed of air permeable members 74a, 74b and communicating with the lower part of a defective article recovery chute 62; a dust suction duct 75 disposed in a state of crossing the air permeable members 73a, 73b, 74a, 74b formed at the non-defective article side dust separating chute 71 and the defective article side dust separating chute 72; and a suction fan 76 connected to a suction port of the dust suction duct 75 to suck and eliminate dust separated by the air permeable members 73a, 73b, 74a, 74b, to the outside of the sorter.

Description

  The present invention relates to a dust collector in an optical granular material sorter.

  Conventionally, a dust collector is provided in an optical granular material sorter such as a grain. This type of dust collector continuously absorbs and removes scattered floating dust generated by the blast blowing action blown from the jet nozzle device in the sorting section having the jet nozzle device of the optical granular material sorter. This prevents dust from entering the optical detection unit composed of precision instruments, etc., and thus contributes to preventing the optical detection unit from malfunctioning and improving the sorting accuracy. is there. For example, a dust collector in a color sorter disclosed in Patent Document 1 includes a dust collection box in which a dust collection window portion is formed on the side facing the injection nozzle port, and an air exhaust port provided on a side portion of the dust collection box. And a dust collection duct for suctioning and removing dust.

  In the conventional dust collector, only fine dust mixed with defective products blown off by the blast from the spray nozzle device is sucked and removed. And since the non-defective product recovery rods that flow down as they are without receiving the blast of the spray nozzle device are provided below the spray nozzle device, the following problems arise. That is: In the non-defective product that flows down as it is without receiving the blast effect of the spray nozzle device, fine dust mixed in the non-defective product is not sucked and removed. 2. If the suction force of the dust collector is weak, fine dust mixed with defective products may enter the non-defective product collection basket and dust may enter the good product side.

Japanese Patent No. 3285076

  In view of the above problems, the present invention provides a dust collector in an optical granular material sorter capable of sucking and removing fine dust mixed on a defective product side as well as fine dust mixed on a defective product side. Technical issue.

  In order to solve the above-described problems, the present invention eliminates the particulate matter from the fall trajectory based on the detection result of the optical detection means that drops the raw material made of the particulate matter and optically detects it at a predetermined position. A sorting unit for sorting and a defective product collecting basket that receives the granular material excluded from the falling locus by the sorting unit, and a non-defective product collecting basket that receives the granular material that has fallen without being excluded from the falling locus by the sorting unit. An optical granular material sorter comprising a product collection unit, wherein the product is a non-defective product that is communicated with the lower part of the non-defective product collection basket and partly formed by a breathable member below the sorted product collection unit. A defective product-side dust separation chute that communicates with the side dust separation chute and the lower part of the defective product collecting bowl and is partially formed by a breathable member; the good product-side dust separation chute and the defective product-side dust component; A dust suction duct disposed in a state of traversing the breathable member formed on the chute, and a suction connected to the suction port of the dust suction duct and for removing dust separated by the breathable member outside the machine Technical measures were taken to provide a dust collector with a fan.

  According to a second aspect of the present invention, the dust suction duct is provided with a secondary air inlet on the upstream side thereof.

  According to invention of Claim 3, the said dust collection part is attached and comprised by the apparatus of the structure which arranged the optical granular material sorter in parallel, It is characterized by the above-mentioned.

  According to the present invention, the non-defective product collecting dust lowering part communicates with the lower part of the sorted product collecting part and the non-defective product side dust separation chute partially formed by the air-permeable member and communicated with the lower part of the defective product collecting basket. In addition, a dust suction duct arranged in a state of traversing the defective product side dust separation chute partially formed by the breathable member and the good product side dust separation chute and the defective product side dust separation chute And a suction fan that is connected to the suction port of the dust suction duct and sucks and removes the dust separated by the breathable member outside the machine. The plurality of air-permeable members of the defective product side dust separation chute and the good product side dust separation chute are sequentially traversed and passed. That is, as shown in FIG. 2, it is possible to suck and remove fine dust mixed with defective products on the defective product side dust separation chute, as well as fine dust mixed with defective products on the good product side dust separation chute.

  The dust suction duct is provided with a secondary air intake on the upstream side thereof, so that a plurality of air-permeable members including a non-defective product side dust separation chute on the upstream side and a defective product side dust separation chute on the downstream side are provided. Even in the case of suction, the suction wind force is not attenuated, and the dust suction force is improved.

  In addition, since the dust collecting unit is attached to an apparatus having a configuration in which a plurality of optical granular material sorters are arranged side by side, it can be applied to a wide variety of optical granular material sorters.

It is a schematic longitudinal cross-sectional view of the dust collector in the optical granular material sorter of this invention. It is a partially expanded sectional view of FIG. FIG. 2 is a perspective view of a sorting apparatus having a configuration in which a plurality of sorters shown in FIG. 1 are arranged side by side.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic longitudinal sectional view of a dust collector in the optical granular material sorter of the present invention, and FIG. 2 is a partially enlarged sectional view of FIG.

  In FIG. 1, the code | symbol 1 is an optical granular material sorter which sorts the raw material which consists of granular materials, such as a grain and a resin pellet, into a non-defective product and a defective product based on optical means, such as a color. This sorter 1 mainly includes a granular material supply unit 2, a falling chute 3, an optical detection unit 4, a sorting unit 5, a sorted product collection unit 6, and a dust collection unit 7.

  The granular material supply unit 2 includes an oscillating feeder 9 that is disposed at the top of the sorter 1 and that stably feeds the granular material in the raw material supply basket 8 toward the flow chute 3. The downflow chute 3 has a predetermined width, is arranged in a state of being inclined below the granular material supply unit 2, and the granular material continuously fed out from the vibration feeder 9 of the granular material supply unit 2 is taken into the chute. It will flow down on the surface.

  The optical detection unit 4 includes a pair of a front optical detection unit 4a disposed on the front side of the dropping trajectory of the granular material and a rear optical detection unit 4b disposed on the rear side of the falling trajectory. It is configured to monitor almost the entire circumference of one grain of objects. The front optical detection unit 4a incorporates a line sensor such as a CCD or an area sensor that can handle a granular material that freely falls in a state of spreading in the width direction from the lower end of the flow chute 3, and receives light in the visible wavelength range. A possible CCD camera 40a is provided. The optical system between the CCD camera 40a and the granular material is provided with a mirror 41a in order to reduce the size of the structure. That is, the light obtained from the granular material R is reflected 90 degrees by the mirror 41a and received by the CCD camera 40a. On the other hand, the rear optical detection unit 4b includes a CCD camera 40b capable of receiving visible light and a CCD camera 42b capable of receiving light in the near infrared (NIR) wavelength region. . Even in this optical system, the mirror 41b is disposed so that the light obtained from the granular material R is reflected by 90 degrees by the mirror 41b, and the reflected light is further dispersed by the spectral filter 43b such as a dichroic mirror. The visible light is received by the CCD camera 40b and the near-infrared light is received by the CCD camera 42b.

  The optical detection unit 4 includes illumination means 44a and 44b such as a fluorescent lamp, a halogen lamp, and an LED light source that illuminate a detection position on the falling locus of the granular material R, and a back that is a background when imaging the granular material. And ground.

  The sorting unit 5 discriminates the granular product from a non-defective product and a defective product based on the imaging signal of the optical detection unit 4, and excludes the defective product based on the discrimination result of the discrimination device 51. The injection nozzle device 52 is provided for sorting the granular material into a non-defective product and a defective product. As with the optical detection unit 4, the spray nozzle device 52 is capable of dealing with particulate matter that freely falls in a state of spreading in the width direction from the lower end of the flow chute 3, and a plurality of nozzles formed in the width direction. Defective products can be eliminated by selectively injecting air from the nozzle holes.

  The selected product collection unit 6 receives a cylindrical non-defective product collecting rod 61 that is collected as a non-defective product without receiving the air jet from the jet nozzle device 52 and the air jet from the jet nozzle device 52. It is formed from a hopper-shaped defective product collecting rod 62 that is excluded from the dropping locus. Reference numeral 63 denotes a sample take-out door provided in the non-defective product collecting basket 61.

  Next, the dust collection part 7 used as the principal part of this invention is demonstrated. Part of the dust collecting portion 7 is formed by the air permeable members 73a and 73b, and the non-defective product side dust separation chute 71 communicating with the lower part of the non-defective product collecting basket 61 and the part are formed by the air permeable members 74a and 74b. A defective product-side dust separation chute 72 communicating with the lower part of the defective product recovery basket 62, a non-defective product-side dust separation chute 71, and a particulate-falling path for dropping the defective product-side dust separation chute 72, A dust suction duct 75 disposed in a state of traversing the air-permeable members 73a, 73b, 74a, 74b, a suction fan 76 for collecting dust, a suction side 76a of the suction fan 76, and the dust suction duct The flexible duct 77 which connects between 75 inlets 75a is provided.

  The breathable members 73a, 73b, 74a, and 74b formed on a part of the non-defective product side dust separation chute 71 and the defective product side dust separation chute 72 are punched metal having a mesh width that does not allow particulate matter falling through the chute to pass through. What is necessary is just to form with woven mesh. In addition, the dust suction duct 75 has a secondary air intake port 75b formed upstream, and external air taken in from the secondary air intake port 75b is introduced into the air permeable members 73a and 73b and the air permeable member. In a state where 74a and 74b are sequentially traversed, suction and discharge are performed toward the suction port 75a. That is, as shown in FIG. 2, it falls from the non-defective product collection basket 61 together with the fine dust mixed in the defective product that falls from the defective product collection basket 62 and reaches the defective product-side dust separation chute 72. The fine dust mixed with the non-defective product reaching 71 can be sucked and removed.

  FIG. 3 is a perspective view of a sorting apparatus 100 having a configuration in which a plurality of sorters 1 shown in FIG. 1 are arranged side by side. The sorting apparatus 100 includes a plurality of sorting units including a first sorting unit 1A, a second sorting unit 1B, and a third sorting unit 1C. Accordingly, the first sorting unit 1A and the second sorting unit 1B are set for primary sorting, while the third sorting unit 1C is set for secondary sorting, or the first sorting unit 1A is set for primary sorting, It is possible to set the second sorting unit 1B for secondary sorting and the third sorting unit 1C for tertiary sorting. That is, when the state of the raw material such as the type, flow rate, and foreign matter mixing rate of the object to be selected changes, it can be appropriately changed to a selection form suitable for the raw material. Even in such a sorting apparatus 100, the dust collecting part 7 which is a main part of the present invention can be applied.

  That is, the first sorting unit 1A, the second sorting unit 1B, and the third sorting unit 1C of FIG. 3 are provided with good product side dust separation chutes 71A, 71B, 71C and defective product side dust separation chutes 72A, 72B, 72C, respectively. In addition, a common dust suction duct 75 is also provided. The remaining configuration (suction fan 76 and flexible duct 77) is not shown in FIG. 3, but has the same configuration as in FIGS. Even in the configuration in which the plurality of sorting units are arranged side by side, the dust suction duct 75 has a secondary air intake port 75b on the upstream side. In addition to the fine dust mixed in the defective product reaching the side dust separation chutes 72A, 72B, 72C, the fine dust mixed in the non-defective product reaching the non-defective product side dust separation chutes 71A, 71B, 71C can be sucked and removed. ing.

  As described above, according to the present invention, the dust collection portion 7 is formed by the non-defective product-side dust separation chute 71 partially formed by the breathable members 73a and 73b and partially formed by the breathable members 74a and 74b. It is a drop path of the defective product-side dust separation chute 72, the non-defective product-side dust separation chute 71, and the granular material that falls on the defective product-side dust separation chute 72 and crosses the air-permeable members 73a, 73b, 74a, 74b. A dust suction duct 75 that sucks in a state, a suction fan 76 for collecting dust, and a flexible duct 77 that connects between the suction side 76a of the suction fan 76 and the suction port 75a of the dust suction duct 75. Since it is provided, not only the fine dust mixed with the defective product reaching the defective product side dust separation chute 72 but also the good product reaching the good product side dust separation chute 71 is obtained. Jill even fine dust has become possible to aspirate.

  In the present invention, raw materials comprising grains such as rice, wheat, beans, nuts, etc., resin pieces such as pellets and beads, fine articles such as pharmaceuticals, ores, shirasu, and other granular materials are made into good and defective products. It can be applied to an optical granular material sorter that sorts or eliminates foreign matters mixed in raw materials, and also applies to a sorting device having a configuration in which a plurality of optical granular material sorters are arranged in parallel. be able to.

DESCRIPTION OF SYMBOLS 1 Optical granule sorter 1A 1st sort unit 1B 2nd sort unit 1C 3rd sort unit 2 Granule supply part 3 Flowing chute 4 Optical detection part 4a Front side optical detection part 4b Rear side optical detection part 40a CCD camera 40b CCD Camera 41a Mirror 41b Mirror 42b CCD camera 43b Spectral filter 44a Illumination means 44b Illumination means 5 Sorting unit 51 Discriminating device 52 Injection nozzle device 6 Sorted product collection unit 61 Non-defective product collection basket 62 Non-defective product collection basket 63 Non-defective product chute 64 Defect product chute 65 Sample extraction door 7 Dust collecting part 71 Non-defective product side dust separation chute 72 Defective product side dust separation chute 73 Breathable member 74 Breathable member 75 Dust suction duct 75a Suction port 75b Secondary air intake port 76 Suction fan 77 Flexible duct 8 Raw material supply bowl 9 Moving the feeder 100 sorting device

Claims (3)

An optical detection means for dropping a raw material made of granular material and optically detecting it at a predetermined position;
A screening unit that screens the particulate matter by removing it from the falling locus based on the detection result by the optical detection unit;
A defective product recovery basket that receives the granular material that has been excluded from the fall trajectory by the sorting section, and a sorted product recovery section that includes the non-defective product recovery basket that receives the granular material that has been dropped from the fall trajectory by the sorting section. An optical granular sorter,
A lower part of the sorted product collecting unit communicates with the lower part of the non-defective product collecting bowl, and communicates with a non-defective article side dust separation chute partially formed by a breathable member, and the lower part of the defective article collecting bowl, and Defective product-side dust separation chute partially formed by a breathable member, and a dust suction duct arranged in a state of traversing the good product-side dust separation chute and the breathable member formed on the defective product-side dust separation chute And a dust collecting unit that is connected to the suction port of the dust suction duct and has a suction fan for sucking and removing the dust separated by the breathable member outside the apparatus. A dust collector in an object sorter.   The dust collecting apparatus for an optical granular material sorter according to claim 1, wherein the dust suction duct is formed with a secondary air intake port upstream of the dust suction duct.   The dust collector in the optical granule sorter according to claim 1 or 2, wherein the dust collector is attached to an apparatus having a configuration in which a plurality of the optical granule sorters are arranged side by side.

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