JP5523257B2 - Sorting device - Google Patents

Description

  The present invention relates to a sorting device for removing a desired sorting object from a plurality of sorting objects.

  Conventionally, defective products are detected from a plurality of chopped vegetables conveyed by a conveyor using an optical sensor, and air is selectively injected from a nozzle assembly in which a large number of nozzles each having an air injection port are arranged in a straight line. There is known a color sorter for square-cut vegetables that blows out defective products to a defective product discharge chamber and removes defective products from a plurality of square-cut vegetables. In such a conventional color sorter for square-cut vegetables, when the defective product is blown away by air injection from the nozzle, not only the defective product but also the good product in the vicinity of the defective product may be blown together. As a result, there is a problem that the accuracy of selecting good products and defective products is reduced (see, for example, Patent Document 1).

  Conventionally, in order to improve the accuracy of selecting non-defective products and defective products, air injection by reducing the width of each air injection port of the nozzle assembly and the interval between adjacent air injection ports. There has been proposed a granular color sorter that makes it difficult for air injected from a mouth toward a defective product to hit a non-defective product close to the defective product (see, for example, Patent Document 2).

JP-A-10-202206 JP 2006-150177 A

  However, in the conventional granular material color sorter disclosed in Patent Document 2, the nozzle assembly includes a plurality of solenoid valves that individually inject air from each air injection port, an air passage that supplies air to each nozzle, and the like. Since it is necessary to provide it, there is a limit in narrowing the space | interval between each air injection port. Therefore, it becomes impossible to further improve the accuracy of selecting good products and defective products.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a sorting apparatus that can improve the accuracy of sorting the objects to be sorted.

  The sorting apparatus according to the present invention includes a first detection unit and a first injection nozzle that detect the state of the sorting object when the sorting object passes through a preset first detection region and should be removed. By selectively injecting gas for blowing away the object to be sorted from the first injection nozzle according to the detection result by the first detection unit, among the objects to be sorted that have passed through the first detection region, A first injection nozzle having a first gas injection device and a second injection nozzle for removing an object to be sorted, and selectively ejecting a gas for blowing away the object to be removed from the second injection nozzle. The 2nd gas injection device which removes a part of sorting objects among the sorting objects which passed through this position is provided.

  In the sorting apparatus according to the present invention, the gas for blowing away the sorting object to be removed is selectively jetted from the first jet nozzle in accordance with the detection result by the first detector, whereby the first detection region. A part of the objects to be sorted out of the objects to be filtered is removed, and after that, a gas for blowing away the objects to be removed is selectively injected from the second injection nozzle, whereby the first Of the objects to be sorted that have passed through the position of the spray nozzle, some of the objects to be sorted are removed again, so that the process of removing the objects to be sorted can be provided a plurality of times. Thereby, the precision which sorts each to-be-sorted thing to the to-be-sorted article to be removed and the to-be-sorted article which does not want to be removed can be improved.

It is a block diagram which shows the selection apparatus by Embodiment 1 of this invention. It is a top view which shows the rear-end part of the belt conveyor of FIG. 1, and its vicinity. It is a block diagram which shows the selection apparatus by Embodiment 2 of this invention. It is a block diagram which shows the selection apparatus by Embodiment 3 of this invention. It is a bottom view which shows the 1st gas injection device of FIG. 4, the 2nd gas injection device, and the 3rd gas injection device.

Embodiment 1 FIG.
FIG. 1 is a block diagram showing a sorting apparatus according to Embodiment 1 of the present invention. In the figure, the sorting apparatus 1 includes a sorting object (non-defective product) that is not to be removed and a sorting object (non-defective product) that is to be removed (a non-defective product, for example). This is a device that sorts out defective products. Examples of materials to be sorted by the sorting device 1 include those in which rice grains (good products) and pebbles (defective products) are mixed, plastic pieces not containing bromine (good products), and bromine. Examples include a mixture of plastic pieces (defective products).

  The sorting device 1 includes a supply device 4 that supplies a plurality of non-defective products (sorted items to be removed) 2 and defective products (sorted items to be removed) 3 mixed together, and a plurality of sorted items. A belt conveyor (conveying device) 5 that conveys an object at a predetermined speed, a slide 6 that guides an object to be sorted from the supply device 4 to the belt conveyor 5, and a position different from each other disposed near the rear end of the belt conveyor 5. Among the first detection area 7 and the second detection area 8 set in advance, the state of the object to be sorted that passes through the first detection area 7 and the state of the object to be sorted that passes through the second detection area 8 are individually set. And a first gas injection device that removes a part of the objects to be sorted out of the objects to be sorted that have passed through the first detection region 7 according to the detection result of the integral detector 9. 10 and removed by the first gas injection device 10 A guide device 11 that guides the selection items to the second detection region 8 and a part of the selection items that have passed through the second detection region 8 are removed according to the detection result of the integrated detection device 9. A second gas injection device 12, a first recovery box (first recovery portion) 13 for recovering the object to be sorted that has passed through the first gas injection device 10 without being removed by the first gas injection device 10, and a second A second recovery box (second recovery unit) 14 that recovers the object to be sorted that has passed through the second gas injector 12 without being removed by the gas injector 12, and the object that has been removed by the second gas injector 12 And a third collection box (third collection unit) 15 for collecting items.

  The supply device 4 includes a hopper 16 that stores the non-defective product 2 and the defective product 3 as the objects to be sorted in a mixed state, and a supply device body 17 that sequentially supplies a predetermined amount of the material to be sorted from the hopper 16 to the slide 6. Have. The supply device main body 17 sequentially feeds the objects to be sorted to the slide 6 by applying vibration to the objects to be sorted in the hopper 16.

  A vibration device is attached to the slide 6. The objects to be sorted on the slide 6 are moved when the slide 6 is vibrated by the vibration device, and are sequentially sent to the belt conveyor 5. As a result, a predetermined amount of objects to be sorted is supplied to the belt conveyor 5 at a constant rate.

  The belt conveyor 5 includes a pair of rollers 18 and 19 disposed apart from each other, and an endless belt 20 wound between the rollers 18 and 19. The belt 20 is rotated by rotating at least one of the rollers 18 and 19 by a driving machine (not shown). The objects to be sorted supplied to the belt conveyor 5 are conveyed at a predetermined speed from the front end portion to the rear end portion of the belt conveyor 5 by the circular movement of the belt 20. The object to be sorted that has reached the rear end of the belt conveyor 5 jumps out from the rear end of the belt conveyor 5 toward the first detection region 7.

  Here, FIG. 2 is a top view showing the rear end portion of the belt conveyor 5 of FIG. 1 and the vicinity thereof. As shown in FIGS. 1 and 2, the first detection region 7 is set on a path along which the object to be sorted that has jumped out from the rear end of the belt conveyor 5 naturally falls. In this example, the first detection region 7 is set at a position facing the rear end of the belt conveyor 5. Further, the width of the first detection region 7 is wider than the width of the belt 20. Accordingly, all the objects to be sorted that have jumped out of the belt conveyor 5 pass through the first detection region 7.

  The second detection area 8 is set at a position that is out of the path where the object to be sorted that has jumped out from the rear end of the belt conveyor 5 naturally falls. Therefore, the object to be sorted conveyed by the belt conveyor 5 jumps out from the rear end portion of the belt conveyor 5 while avoiding the second detection area 8. The second detection area 8 is set at a position adjacent to the first detection area 7. In this example, the second detection region 8 is adjacent to the first detection region 7 in the width direction of the belt conveyor 5.

  The first detection region 7 and the second detection region 8 are spaces set between the irradiation source 21 and the receiver 22 arranged in parallel to each other. The irradiation source 21 and the receiver 22 are arranged along the direction in which the first detection region 7 and the second detection region 8 are arranged (in this example, the width direction of the belt conveyor 5).

  The irradiation source 21 emits electromagnetic waves (for example, visible light and X-rays) to the first detection area 7 and the first irradiation unit 21a that irradiates the first detection areas 7 with electromagnetic waves (for example, visible light and X-rays). It is comprised by the 2nd irradiation part 21b to irradiate. The first irradiation unit 21a and the second irradiation unit 21b are integrated with each other. In this example, a portion of the irradiation source 21 that contacts the first detection region 7 is a first irradiation unit 21a, and a portion of the irradiation source 21 that contacts the second detection region 8 is a second irradiation unit 21b.

  The receiver 22 includes a first receiver 22a that receives electromagnetic waves that have passed through the first detection area 7 from the first irradiation section 21a, and a second receiver that receives electromagnetic waves that have passed through the second detection area 8 from the second irradiation section 21b. 22b. The first receiver 22a and the second receiver 22b are integrated with each other. In this example, the receiver 22 is composed of a plurality of unit reception sensors (not shown) arranged along a straight line parallel to the irradiation source 21. Among the unit reception sensors, the unit reception sensor that is in contact with the first detection region 7 is the first reception unit 22a, and the unit reception sensor that is in contact with the second detection region 8 is the second reception unit 22b.

  That is, the first detection region 7 is set between the first irradiation unit 21a and the first reception unit 22a, and the second detection region 8 is set between the second irradiation unit 21b and the second reception unit 22b. Yes.

  The electromagnetic waves received by the first receiving unit 22 a are different when the non-defective product 2 passes through the first detection region 7 and when the defective product 3 passes through the first detection region 7. The electromagnetic waves received by the second receiver 22 b are different when the non-defective product 2 passes through the second detection region 8 and when the defective product 3 passes through the second detection region 8. The receiver 22 detects the state of the object to be sorted by the difference in electromagnetic waves when the object to be sorted passes through each of the first detection area 7 and the second detection area 8.

  For example, when the electromagnetic wave emitted from the irradiation source 21 is visible light, the color and shape of the object to be sorted are detected by the receiver 22. When the electromagnetic wave irradiated from the irradiation source 21 is X-rays, the X-ray transmittance of the object to be selected is detected by the receiver 22. Therefore, for example, when rice grains and pebbles are to be sorted, electromagnetic waves from the irradiation source 21 are made visible light, and a plastic piece not containing bromine and a plastic piece containing bromine are taken to be sorted. In the case where the electromagnetic wave is present, the electromagnetic wave from the irradiation source 21 becomes X-rays. Information on the electromagnetic wave received by the receiver 22 is sent to a control unit (discrimination unit) (not shown).

  The 1st irradiation part 21a and the 1st receiving part 22a comprise the 1st detection part which detects the state of the to-be-sorted object which passes the 1st detection field 7. The 2nd irradiation part 21b and the 2nd receiving part 22b comprise the 2nd detection part which detects the state of the to-be-sorted object which passes the 2nd detection area 8. FIG. The integrated detection device 9 includes a first detection unit and a second detection unit.

  Based on the information from the first receiving unit 22a (that is, based on the detection result by the first detecting unit of the integrated detection device 9), the control unit converts the non-defective product 2 that has passed through the first detection region 7 to the non-defective product 2. And pass through the second detection area 8 based on the information from the second receiver 22b (that is, based on the detection result of the second detector of the integrated detector 9). The to-be-sorted object is discriminated as either a non-defective product 2 or a defective product 3. Further, the control unit controls the first gas injection device 10 according to the determination result based on the information from the first reception unit 22a, and the second gas injection according to the determination result based on the information from the second reception unit 22b. The device 12 is controlled.

  The first gas injection device 10 includes a first injection nozzle 10 a that is disposed on the downstream side of the first detection region 7 in the traveling direction of the object to be sorted that has jumped out from the rear end portion of the belt conveyor 5. The first injection nozzle 10a has a plurality of gas injection ports (not shown) arranged at intervals from each other in the direction intersecting the traveling direction of the object to be sorted (in this example, the width direction of the belt conveyor 5). ) Are provided in a row. Further, the first injection nozzle 10a is provided with a gas passage for introducing gas to each gas injection port and a plurality of electromagnetic valves for individually injecting gas from each gas injection port (all are Not shown).

  The first gas injection device 10 controls the gas (in this example, air) for blowing off the defective product 3 under the control of the control unit according to the detection result by the first detection unit of the integrated detection device 9. It selectively injects from each gas injection port of the injection nozzle 10a. That is, the first gas injection device 10 controls the control unit to control the gas from each gas injection port of the first injection nozzle 10a at the timing when the defective product 3 is blown out of the selection object that has passed through the first detection region 7. Inject selectively.

  Among the objects to be selected that have passed through the first detection region 7, some of the objects to be selected are removed by the guide device 11 by changing the traveling direction by being blown off by the gas injection from the first injection nozzle 10a. . In this example, the object to be sorted is blown away by the gas injection from the first injection nozzle 10a, whereby the traveling direction of the object to be sorted is changed downward. On the other hand, the object to be sorted that has passed through the position of the first injection nozzle 10a while avoiding the removal of the gas from the first injection nozzle 10a is naturally dropped and recovered in the first recovery box 13 as it is.

  Here, for example, when the number of objects to be selected per unit space is large, or when the objects to be selected are relatively small, not only the defective product 3 but also the defective product due to the gas injected from the first injection nozzle 10a. Non-defective products 2 that are close to 3 may also be blown off together. Accordingly, some of the objects to be selected that have been removed by the gas injection from the first injection nozzle may include not only the defective product 3 but also the non-defective product 2.

  The guide device 11 is provided at the lower end portion of the receiving portion 23 that collects the object to be sorted removed by the gas injection from the first injection nozzle 10a, and the object to be sorted that is collected by the receiving portion 23. And a discharge portion 24 that leads to the second detection region 8 while avoiding the first detection region 7.

  The receiving part 23 is arrange | positioned under the 1st injection nozzle 10a. Moreover, the receiving part 23 becomes a case opened from the lower end part toward the upper end part and opened at the upper end part. The bottom surface of the receiving portion 23 is inclined downward toward the discharge portion 24.

  The discharge portion 24 is a tubular member that is inclined downward toward the second detection region 8. The object to be sorted that has entered the discharge portion 24 from the receiving portion 23 moves while sliding on the discharge portion 24 due to the inclination of the discharge portion 24, and jumps out from the discharge portion 24 to the second detection region 8. Thereby, the direction in which the object to be sorted jumps out from the discharge portion 24 is substantially opposite to the direction in which the object to be sorted jumps out from the rear end portion of the belt conveyor 5. That is, among the objects that have passed through the first detection area 7, the traveling direction of some of the objects to be selected is reversed toward the second detection area 8 by the first gas injection device 10 and the guide device 11. .

  The second gas injection device 12 includes a second injection nozzle 12 a that is disposed on the downstream side of the second detection region 8 in the traveling direction of the object to be sorted that has jumped out from the discharge portion 24. Similarly to the first injection nozzle 10a, the second injection nozzle 12a is disposed at a distance from each other in the direction intersecting the traveling direction of the object to be sorted (in this example, the width direction of the belt conveyor 5). A plurality of gas injection ports (not shown) are provided in a row. Further, the second injection nozzle 12a is provided with a gas passage for guiding gas to each gas injection port and a plurality of solenoid valves for individually injecting gas from each gas injection port (all of them). Not shown).

  The second gas injection device 12 controls the second gas injection device 12 according to the detection result by the second detection unit of the integrated detection device 9 to blow off the defective product 3 (air in this example) under the control of the control unit. It injects selectively from each gas injection port of the injection nozzle 12a. That is, the second gas injection device 12 controls the control unit to control the gas from each gas injection port of the second injection nozzle 12a at the timing when the defective product 3 is blown out of the selection object that has passed through the second detection region 8. Inject selectively. In this example, the gas injection direction of the first injection nozzle 12a is vertically downward.

  Among the objects to be sorted that have passed through the second detection region 8, some of the objects to be sorted are removed by changing the traveling direction by being blown off by the gas injection from the second injection nozzle 12a, and the third collection box 15 is removed. To be recovered. In this example, the traveling direction of the object to be sorted blown off by the gas injection from the second injection nozzle 12a is changed downward. On the other hand, the object to be sorted that has passed through the position of the second injection nozzle 12a while avoiding the removal of the gas from the second injection nozzle 12a is naturally dropped and recovered in the second recovery box 14 as it is.

  Next, the operation will be described. When a plurality of objects to be selected are supplied from the supply device 4 to the belt conveyor 5 via the slide 6, the objects to be selected are conveyed from the front end portion of the belt conveyor 5 to the rear end portion at a predetermined speed. The object to be sorted that has reached the rear end portion of the belt conveyor 5 jumps out of the rear end portion of the belt conveyor 5, passes through the first detection region 7, and advances to the position of the first injection nozzle 10a.

  When each object to be sorted passes through the first detection region 7, the state of the object to be sorted that has passed through the first detection region 7 is detected by the first detection unit of the integrated detection device 9. Thereafter, information on the detection result by the first detection unit is sent to the control unit, and each control unit determines whether the selection object that has passed through the first detection region 7 is a non-defective product 2 or a defective product 3. Discriminated about things.

  Thereafter, when each object to be sorted reaches the position of the first injection nozzle 10a, the first injection nozzle is timed to blow the defective product 3 out of each object under control of the first gas injection device 10 by the control unit. Gas is selectively injected from each gas injection port 10a. As a result, among the objects to be sorted that have passed through the first detection region 7, a part of the objects to be sorted is blown off and removed, and the remaining objects to be sorted proceed without being removed. At this time, not only the defective product 3 but also the non-defective product 2 may be blown together by the gas jetted from the first injection nozzle 10a, so that not only the defective product 3 but also the good product is removed. 2 is also included.

  Thereafter, the object to be sorted removed by the gas injection from the first injection nozzle 10a is collected in the receiving portion 23, and the object to be sorted that has proceeded without being removed is collected in the first collection box 13.

  The object to be sorted collected in the receiving part 23 is guided to the emitting part 24 by the inclination of the bottom surface of the receiving part 23 and jumps out from the emitting part 24 to the second detection region 8. The object to be sorted out of the discharge unit 24 passes through the second detection region 8 and advances to the position of the second injection nozzle 12a.

  When each object to be sorted passes through the second detection region 8, the state of the object to be sorted that has passed through the second detection region 8 is detected by the second detection unit of the integrated detection device 9. Thereafter, the information of the detection result by the second detection unit is sent to the control unit, and in the control unit, whether the selection object that has passed through the second detection region 8 is a non-defective product 2 or a defective product 3 is selected. Discriminated about things.

  Thereafter, when the object to be selected reaches the position of the second injection nozzle 12a, the second injection nozzle 12a is controlled at the timing when the defective product 3 is blown out of each object to be selected by the control of the second gas injection device 12 by the control unit. Gas is selectively injected from each gas injection port. As a result, among the objects to be selected that have passed through the second detection region 8, some of the objects to be selected are blown off and removed, and the remaining objects to be selected proceed without being removed.

  Thereafter, the object to be sorted removed by the gas injection from the second injection nozzle 12a is collected in the third collection box 15, and the object to be sorted without being removed is collected in the second collection box 14. .

  In such a sorting apparatus 1, the gas for blowing off the defective product 3 is selectively injected from the first injection nozzle 10 a according to the detection result by the first detection unit of the integrated detection device 9. Among the objects to be sorted that have passed through the one detection region 7, a part of the objects to be sorted is removed, and then a gas for blowing off the defective product 3 is selectively jetted from the second jet nozzle 12a. Of the objects to be sorted that have passed through the position of the first injection nozzle 10a, some of the objects to be sorted are removed again, so that the step of removing the defective product 3 can be provided a plurality of times. As a result, it is possible to greatly improve the accuracy of sorting the objects to be sorted into the objects to be removed (defective products) and the objects to be sorted (non-defective products) that should not be removed.

  Further, the state of the object to be sorted removed by the gas injection from the first injection nozzle 10a is detected by the second detection unit of the integrated detection device 9, and the gas injection from the second injection nozzle 12a is the second. Since the detection is performed according to the detection result by the detection unit, the defective product 3 can be more reliably removed from each object to be sorted not only at the position of the first injection nozzle 10a but also at the position of the second injection nozzle 12a. .

  In the integrated detection device 9, the first irradiation unit 21a and the second irradiation unit 21b are integrated with each other to form the irradiation source 21, and the first reception unit 22a and the second reception unit 22b are integrated with each other. Since the receiver 22 is configured, the number of parts constituting the integrated detection device 9 can be reduced, and the cost can be reduced. Further, the integrated detection device 9 can be downsized.

Embodiment 2. FIG.
In the first embodiment, the first detection unit that detects the state of the selection object that passes through the first detection region 7 and the second detection unit that detects the state of the selection object that passes through the second detection region 8 include Although integrated, the first detection unit and the second detection unit may be separately provided.

  That is, FIG. 3 is a block diagram showing a sorting device according to Embodiment 2 of the present invention. In the figure, the first detection area 7 is set at a position facing the rear end of the belt conveyor 5 as in the first embodiment. The second detection area 8 is set at a position away from the first detection area 7. The second detection area 8 is set below the guide device 11. A first detection device (first detection unit) 31 that detects the state of the object that passes through the first detection region 7 and a second detection device that detects the state of the object that passes through the second detection region 8 ( The second detection unit 32 is arranged away from each other.

  The first detection device 31 is disposed away from the first irradiation unit 33 and the first irradiation unit 33 that irradiates the first detection region 7 with electromagnetic waves (such as visible light and X-rays), and the first irradiation unit 33. And a first receiver 34 that receives the electromagnetic wave that has passed through the first detection region 7. The first detection region 7 is set between the first irradiation unit 33 and the first reception unit 34.

  The first irradiation unit 33 is disposed along the width direction of the belt conveyor 5. The first receiver 34 is arranged in parallel with the first irradiation unit 33. Further, the first receiving unit 34 includes a plurality of unit receiving sensors (not shown) arranged along a straight line parallel to the first irradiation unit 33. The first detection device 31 detects the state of the object to be sorted based on the difference in electromagnetic waves received by the first receiver 34 when the object to be sorted passes through the first detection region 7.

  The second detection device 32 is disposed away from the second irradiation unit 35 and the second irradiation unit 35 that irradiates the second detection region 8 with electromagnetic waves (for example, visible light, X-rays, etc.). And a second receiver 36 that receives the electromagnetic wave that has passed through the second detection region 8. The second irradiating unit 35 and the second receiving unit 36 are opposed to each other via the second detection region 8 in the horizontal direction. Therefore, the second detection region 8 is set between the second irradiation unit 35 and the second reception unit 36.

  The second irradiation unit 35 is disposed along the width direction of the belt conveyor 5. The second receiving unit 36 is disposed in parallel with the second irradiation unit 35. The second receiving unit 36 includes a plurality of unit receiving sensors (not shown) arranged along a straight line parallel to the second irradiation unit 35. The second detection device 32 detects the state of the object to be sorted based on the difference in electromagnetic waves received by the second receiver 36 when the object to be sorted passes through the second detection region 8.

  That is, in this example, the 1st irradiation part 33, the 1st receiving part 34, the 2nd irradiation part 35, and the 2nd receiving part 36 are arrange | positioned mutually apart.

  Information on the electromagnetic waves received by each of the first receiving unit 34 and the second receiving unit 36 is sent to the control unit. Based on the information from the first receiving unit 34, the control unit discriminates the selection object that has passed through the first detection region 7 as either a non-defective product 2 or a defective product 3, and uses the information from the second receiving unit 36 as the information. Based on this, the object to be sorted that has passed through the second detection region 8 is determined as one of the non-defective product 2 and the defective product 3. Further, the control unit controls the first gas injection device 10 according to the determination result based on the information from the first reception unit 34, and the second gas injection according to the determination result based on the information from the second reception unit 36. The device 12 is controlled.

  The guide device 11 is provided at the lower end portion of the receiving portion 37 for collecting the object to be sorted removed by the gas injection from the first injection nozzle 10a, and the object to be sorted collected by the receiving portion 37 is collected at the lower end of the receiving portion 37. And a discharge portion 38 that leads to the second detection region 8 while avoiding the first detection region 7.

  The receiving part 37 is arrange | positioned under the 1st injection nozzle 10a. The receiving portion 37 is a case that extends from the lower end portion toward the upper end portion and is opened at the upper end portion.

  The discharge portion 38 is a tubular member that protrudes downward from the lower end portion of the receiving portion 37 along the vertical line. The object to be sorted that has entered the discharge unit 38 from the receiving unit 37 moves in a narrowed range within the discharge unit 38 and jumps out of the discharge unit 38 to the second detection region 8. Thereby, the direction in which the object to be sorted jumps out from the discharge portion 38 is vertically downward. In this example, the range in which the selection object jumps out from the discharge unit 38 to the second detection region 8 is limited to a narrowed range in the discharge unit 38, whereby the second detection region 8 and the second detection device 32. Each of these is reduced.

  In this example, the gas injection direction of the second injection nozzle 12a is the horizontal direction. Other configurations are the same as those in the first embodiment.

  Next, the operation will be described. The operation until the object to be sorted jumps out from the rear end portion of the belt conveyor 5 and passes through the first detection region 7 is the same as that in the first embodiment. When the object to be sorted passes through the first detection area 7, the state of the object to be sorted that has passed through the first detection area 7 is detected by the first detection device 31. Thereafter, information on the detection result by the first detection device 31 is sent to the control unit, and the control unit determines whether the object that has passed through the first detection region 7 is a non-defective product 2 or a defective product 3. Discrimination is made for the selected item.

  Thereafter, when each object to be sorted reaches the position of the first injection nozzle 10a, the gas is injected into the first injection nozzle 10a at the timing when the defective product 3 is blown off by the control of the first gas injection device 10 by the control unit. It is jetted selectively from the mouth. As a result, some of the objects to be sorted are removed and collected in the receiving portion 37, and the remaining objects to be sorted proceed without being removed and collected in the first collection box 13.

  The objects to be sorted collected in the receiving part 37 are guided to the discharge part 38 by the guidance of the receiving part 37. The object to be sorted guided from the receiving part 37 to the discharge part 38 moves in a narrowed range in the discharge part 38 and jumps downward along the vertical line from the discharge part 38. The object to be sorted out of the discharge unit 24 passes through the second detection region 8 and advances to the position of the second injection nozzle 12a.

  When each object to be selected passes through the second detection region 8, the state of the object to be selected is detected by the second detection device 32. Thereafter, information of the detection result by the second detection device 32 is sent to the control unit, and the control unit determines whether the object that has passed through the second detection region 8 is a non-defective product 2 or a defective product 3. Discrimination is made for the selected item.

  Thereafter, when the object to be sorted reaches the position of the second injection nozzle 12a, the gas is discharged to each gas injection port of the second injection nozzle 12a at the timing when the defective product 3 is blown off by the control of the second gas injection device 12 by the control unit. Is selectively injected. As a result, of the objects to be sorted that have passed through the second detection area 8, some of the objects to be sorted are removed and collected in the third collection box 15, and the remaining objects to be sorted are not removed and proceed as they are. 2 Collected in a collection box 14.

  In such a sorting apparatus 1, since the first irradiation unit 33, the first reception unit 34, the second irradiation unit 35, and the second reception unit 36 are arranged apart from each other, the second detection region 8 is first detected. It can be set at a position away from the region 7. Thereby, the freedom degree of the layout of the 2nd detection apparatus 32 with respect to the 1st detection apparatus 31 can be aimed at.

  In the first and second embodiments, the guide device 11 is not provided with a device for forcibly moving the object to be selected. For example, the object to be selected is forcibly moved by applying vibration to the object to be selected. A vibration device to be operated may be provided in the guide device 11 or a belt conveyor may be used as the guide device 11.

  Moreover, in Embodiment 1 and 2, the to-be-sorted object removed by the gas injection from the 1st injection nozzle 10a is once collect | recovered by the guide apparatus 11, and is guide | induced to the 2nd detection area | region 8. FIG. However, if the traveling direction of the object removed by the gas injection from the first injection nozzle 10a is the direction toward the second detection region 8, the object to be sorted is once recovered by the guide device 11. Since the object to be sorted can pass through the second detection region 8 as it is without it, the guide device 11 is not necessary.

Embodiment 3 FIG.
FIG. 4 is a block diagram showing a sorting device according to Embodiment 3 of the present invention. In the figure, a gas injection device for removing a part of the objects to be sorted out of the objects having passed through the first detection area 7 at a position farther from the rear end of the belt conveyor 5 than the first detection area 7. A group 41 is provided. The objects to be sorted removed by the gas injection device group 41 are collected in the defective product collection box 42, and the items to be sorted that are not removed by the gas injection device group 41 are collected in the non-defective product collection box 43.

  The gas injection device group 41 includes a first gas injection device 44 having a first injection nozzle 44a, a second gas injection device 45 having a second injection nozzle 45a, and a third gas injection device having a third injection nozzle 46a. 46 is included. The first injection nozzle 44a is disposed at a position closer to the first detection region 7 than the respective positions of the second injection nozzle 45a and the third injection nozzle 46a. The second injection nozzle 45a is disposed at a position closer to the first detection region 7 than the position of the third injection nozzle 46a. Each of the 1st injection nozzle 44a, the 2nd injection nozzle 45a, and the 3rd injection nozzle 46a removes a to-be-sorted thing from a to-be-sorted object by injecting gas and blowing away to-be-sorted object.

  FIG. 5 is a bottom view showing the first injection nozzle 44a, the second injection nozzle 45a, and the third injection nozzle 46a of FIG. 4 and 5, the second injection nozzle 45a is moved to the first injection nozzle 44a in the traveling direction of the object to be sorted that has passed through the position of the first injection nozzle 44a while avoiding removal by the gas from the first injection nozzle 44a. They are arranged at intervals. The third injection nozzle 46a is arranged at an interval with respect to the second injection nozzle 45a in the traveling direction of the selection object that has passed through the position of the second injection nozzle 45a while avoiding removal by the gas from the second injection nozzle 45a. Has been. That is, the first injection nozzle 44a, the second injection nozzle 45a, and the third injection nozzle 46a are not removed by the first to third injection nozzles 44a, 45a, and 46a, respectively, and the traveling directions of the objects to be sorted (see FIG. 5) (in the direction of the arrow 5). Further, each of the first injection nozzle 44a, the second injection nozzle 45a, and the third injection nozzle 46a has a length in a direction intersecting with the traveling direction of the object to be sorted (in this example, the width direction of the belt conveyor 5). It is a nozzle with. The 1st injection nozzle 44a, the 2nd injection nozzle 45a, and the 3rd injection nozzle 46a are mutually arrange | positioned in parallel.

  The first injection nozzle 44a is provided with a plurality of gas injection ports 47 arranged in a row at intervals in the length direction of the first injection nozzle 44a. Further, the first injection nozzle 44a is provided with a gas passage for guiding gas to each gas injection port 47 and a plurality of solenoid valves for individually injecting gas from each gas injection port 47 ( Neither is shown).

  The second injection nozzle 45a is provided with a plurality of gas injection ports 48 arranged in a row at intervals in the length direction of the second injection nozzle 45a. Further, the second injection nozzle 45a is provided with a gas passage for guiding gas to each gas injection port 48 and a plurality of electromagnetic valves for individually injecting gas from each gas injection port 48 ( Neither is shown).

  The third injection nozzle 46a is provided with a plurality of gas injection ports 49 arranged at intervals in the length direction of the third injection nozzle 46a. Further, the third injection nozzle 46a is provided with a gas passage for guiding gas to each gas injection port 49 and a plurality of solenoid valves for individually injecting gas from each gas injection port 49 ( Neither is shown).

  The gas injection ports 47, 48, 49 have the same cross-sectional size and shape. Moreover, the cross-sectional shape of each gas injection port 47,48,49 is made into the rectangle.

  The center of each gas injection port 49 when the first to third injection nozzles 44a, 45a, 46a are viewed along the traveling direction of the selection object is the center of each gas injection port 47 and each gas injection port 48. In contrast, the first to third injection nozzles 44a, 45a, 46a are displaced in the length direction. The center of each gas injection port 48 when the first to third injection nozzles 44 a, 45 a, 46 a are viewed along the traveling direction of the object to be sorted is first relative to the center of each gas injection port 47. -It has shifted | deviated to the length direction of the 3rd injection nozzle 44a, 45a, 46a.

  When the first to third injection nozzles 44a, 45a, 46a are viewed along the traveling direction of the object to be sorted, the gas injection port 47 overlaps with the gas injection port 48 at one end and the gas injection port at the other end. It overlaps with 49. When the first to third injection nozzles 44a, 45a, 46a are viewed along the traveling direction of the object to be sorted, the gas injection port 48 overlaps with the gas injection port 47 at one end and the gas injection port at the other end. It overlaps with 49. When the first to third injection nozzles 44a, 45a, 46a are viewed along the traveling direction of the object to be sorted, the gas injection port 49 overlaps with the gas injection port 47 at one end and the gas injection port at the other end. 48 and overlap. That is, when the first to third injection nozzles 44a, 45a, 46a are viewed along the traveling direction of the object to be sorted, a part of each of the gas injection port 47 and the gas injection port 48, the gas injection port 48, and A part of each of the gas injection ports 49 and a part of each of the gas injection ports 47 and 49 overlap each other.

  The state of the object to be sorted that has passed through the first detection region 7 is detected by the first detection device 31 having the same configuration as in the second embodiment. Information from the first detection device 31 is sent to a control unit (not shown). Based on the information from the first receiving unit 34 of the first detection device 31, the control unit determines the object to be sorted that has passed through the first detection region 7 as either the non-defective product 2 or the defective product 3. Further, the control unit controls each of the first gas injection device 44, the second gas injection device 45, and the third gas injection device 46 in accordance with the determination result based on the information from the first reception unit 34.

  Each of the first gas injection device 44, the second gas injection device 45, and the third gas injection device 46 first detects a gas (air in this example) for blowing off the defective product 3 under the control of the control unit. According to the detection result by the apparatus 31, it injects selectively from each of the 1st injection nozzle 44a, the 2nd injection nozzle 45a, and the 3rd injection nozzle 46a.

  In this example, the guide device 11, the second detection device 32, the second gas injection device 12, the first recovery box 13, the second recovery box 14, and the third recovery box 15 according to the second embodiment are not provided. . Other configurations are the same as those of the second embodiment.

  Next, the operation will be described. The operation until the control unit determines whether each object to be selected that has passed through the first detection region 7 is a non-defective product 2 or a defective product 3 is the same as that in the second embodiment.

  When the object to be selected reaches the position of the first injection nozzle 44a, each gas of the first injection nozzle 44a is controlled at the timing when the defective product 3 is blown out from each object under the control of the first gas injection device 44 by the control unit. Gas is selectively injected from the injection port 47. As a result, among the objects to be sorted that have passed through the first detection region 7, a part of the objects to be sorted is blown off and removed, and the remaining objects to be sorted proceed without being removed.

  The to-be-sorted object that has advanced without being removed at the position of the first injection nozzle 44a reaches the position of the second injection nozzle 45a. When the object to be selected reaches the position of the second injection nozzle 45a, each gas of the second injection nozzle 45a is blown out of the object to be selected 3 by the control of the second gas injection device 45 by the control unit. Gas is selectively injected from the injection port 48. As a result, among the objects to be selected that have passed through the position of the first injection nozzle 44a, some of the objects to be selected are blown off and removed, and the remaining objects to be selected proceed without being removed.

  The object to be sorted that has not been removed at the position of the second injection nozzle 45a reaches the position of the third injection nozzle 46a. When the object to be selected reaches the position of the third injection nozzle 46a, the control unit controls the third gas injection device 46 to control each gas of the third injection nozzle 46a at the timing when the defective product 3 is blown out of each object to be selected. Gas is selectively injected from the injection port 49. As a result, among the objects to be selected that have passed through the position of the second injection nozzle 45a, some of the objects to be selected are blown off and removed, and the remaining objects to be selected proceed without being removed.

  The objects to be sorted removed at the positions of the first injection nozzle 44a, the second injection nozzle 45a, and the third injection nozzle 46a are recovered in the defective product recovery box 42. The to-be-sorted object that has been advanced without being removed to the position of the third injection nozzle 46a is recovered in the non-defective product recovery box 43.

  In such a sorting apparatus 1, the first injection nozzle 44 a and the second injection nozzle 45 a are arranged at intervals from each other in the traveling direction of the object to be sorted that avoids the removal by the first injection nozzle 44 a and proceeds as it is. When the first injection nozzle 44a and the first injection nozzle 44a are viewed along the traveling direction of the object, the center of each gas injection port 48 is shifted from the center of each gas injection port 47, and the gas injection Since a part of each of the opening 47 and the gas injection port 48 is overlapped, the defective product 3 that cannot be removed by the first injection nozzle 44 a by passing the object to be sorted between the gas injection ports 47, It can be removed by gas injection from each gas injection port 48 of the two injection nozzles. Thereby, the defective product 3 can be more reliably removed from the objects to be sorted, and the accuracy of sorting the objects to be sorted can be improved.

  In the above example, the three gas injection devices 44, 45, and 46 are included in the gas injection device group 41, but the number of gas injection devices included in the gas injection device group 41 is two or four. It may be the above.

  Further, the gas injection device group 41 in the above example may be applied to the sorting device 1 of the first or second embodiment.

  Moreover, in each said embodiment, although the vibration apparatus which forcibly moves a to-be-sorted object is provided in the slide stand 6, the slide stand 6 is good also as a belt conveyor. Further, if the object to be sorted naturally moves while sliding due to the inclination of the slide 6, the vibration device may not be provided on the slide 6.

  DESCRIPTION OF SYMBOLS 1 Sorting apparatus, 7 1st detection area, 8 2nd detection area, 9 Integrated detection apparatus, 10 1st gas injection apparatus, 10a 1st injection nozzle, 11 Guide apparatus, 12 2nd gas injection apparatus, 12a 2nd injection Nozzle, 21a first irradiation unit, 21b second irradiation unit, 22a first reception unit, 22b second reception unit, 31 first detection device (first detection unit), 32 second detection device (second detection unit), 33 1st irradiation part, 34 1st receiving part, 35 2nd irradiation part, 36 2nd receiving part, 44 1st gas injection device, 44a 1st injection nozzle, 45 2nd gas injection device, 45a 2nd injection nozzle, 47, 48, 49 Gas injection ports.

Claims (1)

A first detection unit that detects the state of the object to be sorted by passing the object through a first detection area set in advance;
The first injection nozzle has a first injection nozzle, and selectively ejects a gas for blowing off the object to be removed from the first injection nozzle according to a detection result by the first detection unit. 1st gas injection device which removes a part of above-mentioned sorting thing among the above-mentioned sorting objects which passed 1 detection field ,
The state of the object to be sorted is detected when the object to be sorted removed by gas injection from the first injection nozzle passes through a second detection area set at a position different from the first detection area. A second detector
The second injection nozzle has a second injection nozzle, and selectively ejects a gas for blowing away the object to be removed from the second injection nozzle according to a detection result by the second detection device . A second gas injection device that removes some of the objects to be sorted out of the objects to be sorted that have passed through the two detection areas ; and
A guide device for guiding the object to be sorted removed by gas injection from the first injection nozzle to the second detection region ;
The first detection region and the second detection region are set at positions adjacent to each other,
The first detection unit includes a first irradiation unit and a first reception unit that receives an electromagnetic wave that has passed through the first detection region from the first irradiation unit,
The second detection unit includes a second irradiation unit and a second reception unit that receives an electromagnetic wave that has passed through the second detection region from the second irradiation unit,
The first irradiation unit and the second irradiation unit are configured integrally with each other,
The first receiving unit and the second receiving unit are configured integrally with each other,
The guide device is provided at a lower end portion of the receiving portion for collecting the object to be sorted removed by gas injection from the first injection nozzle, and the object to be sorted collected at the receiving portion. And a discharge part that guides to the second detection region,
The bottom surface of the receiving part is inclined downward toward the discharge part,
The discharge part inclines downward toward the second detection area, thereby reversing the traveling direction of the object to be sorted in a substantially reverse direction with respect to the direction in which the object passes through the first detection area. Sorting device characterized by letting go.

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