JP2012007999A - Particulate foreign material inspecting device using particulate sieving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a particulate foreign material inspecting device using a particulate sieving device capable of sieving particulates with a simple structure.SOLUTION: A particulate foreign material inspecting device using a particulate sieving device comprises; a particulate supply mechanism 13 for supplying stored particulates; a sieving device body 15a for sieving with a sieving net 15h after the particulates supplied by the particulate supply mechanism 13 are charged; an elastic supporting member 15v for elastically supporting the sieving device body 15a on a fixed part; and a vibration generating source 15w for transmitting a vibration with being attached to the sieving device body. The particulates sieved by the sieving device are equalized while being conveyed by a powder conveying mechanism and foreign materials mixed in the powder supplied by the powder conveying mechanism are inspected by a foreign material inspecting mechanism.

Description

  The present invention relates to a particulate foreign matter inspection apparatus using a particulate sieving device for sieving, for example, a granular material such as food and medicine.

  Conventionally, as a granular foreign substance inspection device for inspecting foreign substances mixed in granular materials used in foods and pharmaceuticals, for example, a granular material stored in a hopper is adjusted to a predetermined width while adjusting the supply amount with a partition plate. Supplied to the vibration feeder, leveled and transported while applying vibration, then dropped onto the rotating drum from the vibration feeder, transported while forming a uniform layer using the outer peripheral surface of the drum as a guide, and attached to the top surface of the drum By irradiating light to the granular material from the light source, the surface of the granular material is imaged with a line imaging device before the granular material falls freely from the drum, and the image signal is processed by the image processing device to obtain the powder. 2. Description of the Related Art A foreign matter inspection method and foreign matter inspection device in a granular material that determine the presence or absence of foreign matter in a granular material are known (for example, see Patent Document 1).

JP-A-11-190697 JP 2003-126780 A

By the way, in the granular material foreign matter inspection apparatus, if the granular material to be inspected is a powder having a strong cohesiveness, an error will occur if it is supplied to the inspection apparatus as an agglomerate in the powder supply unit. Causes diagnosis. Therefore, it is conceivable to screen the powder to remove agglomerates.
Conventionally, as a sieving device for powder particles, for example, a powder particle feeder is installed on the upper part of the frame body, vibrators are installed on both sides of the middle part of the frame body, and a sieve screen is installed on the two vibrator bodies. There has been proposed a sieving device in which a vibration generating device that attaches and detachably attaches to a vibrating body is installed, and a granular material receiver is installed in the lower part of the frame (see, for example, Patent Document 2).

However, in the conventional example described in the above-mentioned Patent Document 2, since the sieve mesh is mounted between the two vibrating bodies, the structure becomes complicated and the sieve mesh is greatly vibrated. It is necessary to generate a large vibration with the vibration generator, and there is an unsolved problem that the entire configuration becomes large.
Furthermore, in the granular foreign material inspection apparatus, there has been a problem that the structure of the powder supply unit cannot be increased due to a demand for compactness of the apparatus.
Therefore, the present invention has been made paying attention to the above-mentioned unsolved problems of the conventional example, and the granular material using the granular material sieving apparatus capable of sieving the granular material with a simple configuration. The object is to provide a foreign matter inspection apparatus.

  In order to achieve the above object, a particulate foreign matter inspection apparatus according to claim 1 includes: a particulate supply mechanism that supplies a stored particulate; and a particulate that is supplied from the particulate supply mechanism. A sieving device main body that is charged and screened by a sieving net, an elastic support member that elastically supports the sieving device main body on a fixed portion, a vibration generation source that is attached to the sieving device main body and transmits vibrations, and the sieving device A powder transport mechanism for leveling while transporting the powder particles sieved from the main body, and a foreign matter inspection mechanism for inspecting foreign matter mixed in the powder supplied from the powder transport mechanism. It is a feature.

In addition, in the invention according to claim 1, the granular foreign object inspection device according to claim 2 is characterized in that the elastic support member is provided between a support piece fixed to a support substrate, the support piece, and the sieving device main body. It is characterized in that it has a configuration in which it is supported so that the vibration generated by the vibration generating source is amplified by the inserted elastic body and the sieving device main body is swung.
Further, in the particulate foreign matter inspection device according to claim 3, in the invention according to claim 1 or 2, the vibration generation source includes a vibrator attached to at least one of the outer surfaces of the sieving device body. It is characterized by being.

According to a fourth aspect of the present invention, there is provided the particulate foreign matter inspection apparatus according to the third aspect, wherein the vibrator is composed of an air vibrator that generates vibration by supplying pressurized air. It is said.
Moreover, the granular material foreign material inspection apparatus according to claim 5 is the invention according to any one of claims 1 to 5, wherein the foreign material inspection mechanism has an outer periphery of the granular material falling from the granular material transport mechanism. A rotating drum that receives the surface of the rotating drum and conveys it to a sliding position; and an illumination mechanism that illuminates at least the rotating drum in a predetermined illumination area extending in the axial direction between the powder particle dropping position of the rotating drum and the sliding position. And a line imaging device that images the powder illuminated by the illumination mechanism, and a foreign material contamination detection device that detects foreign material contamination based on powder image information captured by the line imaging device. It is said.

According to the present invention, the vibration generating source is configured such that the sieving device main body into which the granular material is charged and sieved by the sieving net is supported by the elastic support member with respect to the fixed portion so as to be swingable, and transmits the vibration to the sieving device main body. By simply amplifying the vibration generated by the vibration source with the elastic support member, the sieving device main body can be greatly swung by a simple configuration with only a small size installed. Can be demonstrated.
By configuring the granular foreign substance inspection device using the granular sieve device having the above effects, it is possible to reliably prevent the agglomerated product of the granular material from being supplied to the granular foreign object inspection device. And accurate foreign matter inspection can be performed.

It is a system configuration figure showing one embodiment of a granular material foreign substance inspection device concerning the present invention. It is sectional drawing which shows the specific structure of the granular material foreign material inspection apparatus of FIG. It is sectional drawing which shows a powder cutting device. It is a perspective view which shows a powder storage hopper and a powder cutting mechanism. It is a front view which shows a powder cutting device. It is a right view which shows a powder cutting device. It is a top view which shows a powder cutting device. It is sectional drawing which shows a powder storage hopper and a powder cutting mechanism. It is an expanded sectional view of the principal part of a powder cutting mechanism. It is a left view which expands and shows a cutting roller to a U-shaped groove | channel. It is a right side surface which shows a cutting roller. It is a figure which shows a cutting roller, Comprising: (a) is a front view, (b) is sectional drawing of the AA line shape of FIG. It is a front view which shows a powder storage hopper and a powder cutting mechanism. It is sectional drawing on the BB line of FIG. It is the C section enlarged view of FIG. It is the D section enlarged view of FIG. It is a longitudinal cross-sectional view of a powder storage hopper and a powder cutting mechanism. It is a front view which shows a powder cutting mechanism and a powder sieving mechanism. It is the perspective view seen from the lower part which shows a powder sieving mechanism. It is a perspective view which shows the principal part of a powder sieving mechanism. It is a front view of a powder sieving mechanism. It is sectional drawing which expands and shows a part of powder sieving mechanism. It is sectional drawing on the EE line of FIG. It is a perspective view which shows a powder guide mechanism and a vibration feeder.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a system configuration diagram showing an embodiment of the present invention. In the figure, 1 is weakly cohesive like powders and pharmaceuticals such as lactose powder, skim milk powder, corn starch and the like that are highly cohesive. This is a color granular material foreign matter inspection apparatus for inspecting foreign matters mixed in various powders such as powder.
The color powder foreign matter inspection apparatus 1 includes a powder cutting device 2 as a granular material supply mechanism, a vibration feeder 3, a foreign matter inspection mechanism 4, a non-defective product collection tank 5, a cyclone 6, a defective product collection tank 7, a blower 8, and A neutral filter 9 is provided.

Moreover, the color powder foreign material inspection apparatus 1 includes a housing 10 having a cutting device installation unit 10A and a foreign material inspection mechanism housing unit 10B.
The powder cutting device 2 stores powders such as lactose powder, skim milk powder, and corn starch that have high cohesiveness to be inspected. Quantitatively cut out as follows.
As shown in FIG. 2, the powder cutting device 2 is installed in a cutting device installation portion 10A of the housing 10, and has a high cohesive powder such as lactose powder, skim milk powder, corn starch, and the like. A powder storage hopper 11 for storing powder, a powder cutting mechanism 13 as a granular material supply mechanism having a cutting roller 12 for cutting powder from the powder storage hopper 11, and the powder cutting mechanism 13 And a roller driving mechanism 14 that rotationally drives the cutting roller 12.

As shown in FIGS. 3 to 8, the powder storage hopper 11 includes a relatively large rectangular tube portion 11 a having an open upper end, a rectangular tube portion 11 c that forms a relatively small rectangular opening 11 b at the lower end, and a rectangular tube portion. 11a and the rectangular pyramid cylinder part 11d which connects between the rectangular cylinder part 11c. A rectangular mounting flange portion 11e is formed to protrude from the outer peripheral side of the rectangular tube portion 11c.
And the rectangular cylinder part 11a of the powder storage hopper 11 is obstruct | occluded with the openable open / close lid 11f. Further, a capacity sensor 11g for measuring the powder capacity in the powder storage hopper 11 is disposed on one short side plate portion of the rectangular pyramidal cylinder portion 11d. Further, an air vibrator 11h that generates vibration is attached to the outer side surface of the long side plate portion on the opposite side to the foreign substance inspection device 4 of the rectangular pyramid cylinder portion 11d. Further, the mounting flange portion 11 e is attached to the mounting flange portion 13 a formed in the powder cutting mechanism 13.

As shown in FIGS. 3 and 8 to 17, the powder cutting mechanism 13 has a rectangular tube portion 13 b that is slightly larger than the rectangular frame portion 11 c of the powder storage hopper 11. A mounting flange 13a protrudes from the outer surface on the upper end side of 13b, and a mounting flange 13c projects from the outer surface slightly below the center.
In addition, the inner peripheral surface of the rectangular rectangular tube portion 13b is opposed to the rectangular opening 11b of the powder storage hopper 11 on the upper end side from the lower side, as clearly shown in FIG. 3, FIG. 8, and FIG. A cutting roller 12 is disposed at a central position between the side wall portions so as to be rotatable in parallel with the long side wall portion. The cutting roller 12 is made of a hard synthetic resin material such as tetrafluoroethylene, and is formed in a cylindrical shape having a diameter of about 150 mm and a length of about 150 mm, which is slightly shorter than the length between the short side wall portions of the rectangular tube portion 13b. ing.

  As shown in FIGS. 10 to 12, the cutting roller 12 is formed with a rough surface that extends in the axial direction at equal intervals in the circumferential direction on the outer peripheral surface, and efficiently cuts out powder having strong cohesion. A relatively large U-shaped groove 12a having a depth of about 3 mm (for example, 26) is formed. As shown in an enlarged view in FIG. 10, the U-shaped groove 12a has a cross-sectional shape that is a flat surface 12b in which the central portion of the bottom portion extends slightly in the tangential direction, and both ends of the flat surface 12b in the circumferential direction. The tapered side wall portions 12e and 12f, which become wider as they go to the outer peripheral surface through the curved portions 12c and 12d, and the outer peripheral end side are formed in a relatively shallow U shape with an angle of 60 °, for example.

Further, the cutting roller 12 has a central opening 12g at the center. The center opening 12g has a shaft fitting hole 12h having a circular cross section chamfered on the end surface side, and a two-sided width hole portion 12i communicating with the shaft fitting hole 12h and having a width shorter than the diameter of the shaft fitting hole 12h. And is formed.
A rotary shaft 12k is inserted from the shaft fitting hole 12h side of the cutting roller 12.
14 to 17, the rotary shaft 12k has a diameter that fits into the shaft fitting hole 12h of the cutting roller 12, and has a large diameter that protrudes relatively long from the end of the cutting roller 12. A portion 12m, a medium diameter portion 12n connected to the large diameter portion 12m, inserted through the two-sided width hole portion 12i of the cutting roller 12, and protruding from the other end of the cutting roller 12, and the medium diameter portion 12n It is formed with a small-diameter male screw portion 12o formed at the tip.

  Further, as shown in FIG. 14, a short cylindrical support portion 13d that supports the rotation shaft 12k and communicates inward is formed on the rotation shaft support portion on one short side portion of the rectangular rectangular tube portion 13b. Yes. In addition, the rotation shaft support portion at the other short side of the rectangular rectangular tube portion 13b supports the rotation shaft 12k having a diameter larger than the large diameter portion 12m of the rotation shaft 12k and smaller than the outer diameter of the cutting roller 12. A long cylindrical support portion 13e communicating inward is formed to face the cylindrical support portion 13d.

Then, the small-diameter male screw portion 12o of the rotary shaft 12k inserted through the cutting roller 12 protrudes from the cylindrical support portion 13d, and the medium-diameter portion 12n of the rotary shaft 12k is rotatable to the cylindrical support portion 13d via the rolling bearing 13f. The large-diameter portion 12m of the rotating shaft 12k is supported rotatably at the tip of the cylindrical support portion 13e via a rolling bearing 13g. Further, a U nut 12p having a locking function is screwed onto the male screw portion 12o of the rotary shaft 12k.
Further, a spur gear 12q is mounted on the outer side of the mounting flange 13c so as to protrude from the cylindrical support portion 13e of the rotary shaft 12k.

  Further, as shown in FIGS. 3, 8 and 9, the powder cutting mechanism 13 is in a horizontal direction with respect to the entire axial length of the cutting roller 12 in contact with the long side plate portion of the rectangular tube portion 13 b. A cutting amount adjusting unit 13h that adjusts a cutting amount of the powder that is moved in accordance with the rotation of the cutting roller 12 that is disposed opposite to each other at a predetermined interval, and a cutting amount adjusting unit 13h. On the other hand, a powder scraping portion 13i that scrapes off the powder adhering to the cutting roller 12 disposed in close proximity to the cutting roller 12 is provided on the opposite side of the cutting roller 12.

  Here, as shown in FIG. 9, the cutout amount adjusting unit 13h has a vertical back surface portion 13j extending along the rectangular tube portion 13b and a downward direction from the upper end of the vertical back surface portion 13j. An inclined guide surface 13k that gradually protrudes inward and extends to a position that maintains a predetermined interval with respect to the cutting roller 12, and is inclined at an inclination angle substantially equal to the inclination angle of the rectangular pyramid cylinder portion 11d of the powder storage hopper 11. A vertical surface 13m slightly extending downward from the lower end of the inclined guide surface 13k, a horizontal surface 13n slightly extending outward from the lower end of the vertical surface 13m, and a large diameter of the rotary shaft 12k downward from the horizontal surface 13n. A vertical surface 13o extending to a substantially lower end position of the portion 12m, and a horizontal bottom surface 13p extending outward from the vertical surface 13o in the horizontal direction and reaching the vertical back surface portion 13j are provided. Then, the powder moved by the cutting roller 12 rotated in the clockwise direction in FIG. 9 is formed by the horizontal surface 13n and the vertical surface 13o through the gap between the outer peripheral surface of the cutting roller 12 and the vertical surface 13m. Is cut downward through the stepped portion.

As shown in FIG. 9, the powder scraping portion 13i includes a vertical back surface portion 13q extending along the rectangular rectangular tube portion 13b, and an inclination of the cutout amount adjusting portion 13h connected to the upper end of the vertical back surface portion 13q. An inclined guide surface 13r that is symmetric with respect to the guide surface 13k across a vertical line passing through the central axis of the cutting roller 12, and extends downward from the lower surface of the inclined guide surface 13r close to the cutting roller 12. A vertical surface 13s and a horizontal bottom surface 13t extending outward in the horizontal direction at the same height as the horizontal bottom surface 13p of the cutout amount adjusting portion 13h of the vertical surface 13s and reaching the vertical back surface portion 13q are provided. . Then, the powder adhering to the cutting roller 12 is scraped off at the edge portion 13u where the vertical surface 13s and the horizontal bottom surface 13t are connected.
Then, as shown in FIG. 14, the cutout amount adjusting portion 13h and the powder scraping portion 13i are screwed to the side wall of the rectangular tube portion 13b so that the vertical position and the horizontal position can be adjusted. .

The spur gear 12q attached to the rotary shaft 12k of the cutting roller 12 is connected to the roller driving mechanism 14. As shown in FIGS. 4, 13 and 14, the roller driving mechanism 14 is attached to the cutting device installation portion 10A of the housing 10 and the mounting flange 13c of the rectangular rectangular tube portion 13b of the powder cutting mechanism 13. There are fixed on a supporting substrate 14a which is detachably screwed, and the electric motor 14b of the rotation speed is high speed drive at a rotational speed range of 2000m ^-1 ~4000m ^-1, the rotation shaft 14c of the electric motor 14b And a spur gear 14d that meshes with a spur gear 12q attached to the rotary shaft 12k. As shown in FIG. 22, the support substrate 14 a is inserted through the lower end side of the rectangular tube portion 13 b of the powder cutting mechanism 13 and through the powder sieving mechanism 15, and the insertion hole 14 e. And a rectangular tube portion 14f extending downward from the peripheral edge portion.

  The powder sieving mechanism 15 is a sieving device body composed of a rectangular rectangular tube part that surrounds a protruding part protruding downward from the support substrate 14a of the rectangular rectangular tube part 13b in the powder cutting mechanism 13 with a predetermined interval from the outside. 15a. In this sieving device main body 15a, as shown in FIG. 22, an inclined guide surface 15b is formed at a position facing the cutting amount adjusting portion 13h of the powder cutting mechanism 13 so as to largely protrude inward. A guide portion 15c is formed, and an inclined guide portion 15e is formed at a position facing the powder scraping portion 13i of the powder cutting mechanism 13 to form an inclined guide portion 15e that protrudes inwardly, A rectangular through hole 15f is formed between the inclined guide portions 15c and 15e.

  An opening portion 15g is formed on the lower surface side of the through hole portion 15f at a position facing the through hole portion 15f, and a sieve portion 15i in which a predetermined mesh screen 15h is disposed so as to cover the opening portion 15g is a sieving device. The main body 15a is detachably supported. Specifically, as shown in an enlarged view in FIG. 22, the sieving portion 15i includes a U-shaped support portion 15j viewed from a plane detachably disposed on the long side portion of the sieving device body 15a, and the support portion 15j. A first support plate 15m having a mounting plate portion 15k extending downward from the outer edge of the central portion of the portion 15j, and a predetermined distance from the protruding portion of the U-shaped support portion 15j in the first support plate 15m And a second support plate 15p having a rectangular plate portion 15n facing each other and a mounting plate portion 15o extending downward from the outer edge thereof.

  In the mounting plate portions 15k and 15o of the support plates 15m and 15p, a dharma hole 15r is formed through which a bolt 15q screwed to the sieving body 15a is inserted. An opening 15g is formed between the first support plate 15m surrounded by the U-shaped support portion 15j of the second support plate 15p and the rectangular plate portion 15n of the second support plate 15p, and a sieve mesh is formed so as to cover the opening 15g. 15h is arranged. Here, the sieve mesh 15h is a flat mesh and a mesh of 10 to 40 is selected according to the properties of the powder to be inspected.

  Further, a mounting flange portion 15s protruding outward is fixed to the outside of the intermediate portion in the vertical direction of the sieving device main body 15a. Four U-shaped support pieces 15t having the mounting flange portions 15s fixed to the support substrate 14a, and coil springs as elastic bodies interposed between the U-shaped support pieces 15t and the mounting flange portions 15s. It is supported by an elastic support member 15v composed of 15u so as to be swingable.

  Further, an air vibrator 15w as a vibration generation source is disposed on the outer surface above the mounting flange portion 15s of the sieving device main body 15a. Vibration is generated by supplying pressurized air to the air vibrator 15w, and this vibration is transmitted to the sieving device main body 15a. At this time, the sieving device main body 15a has the mounting flange portion 15s supported by the support substrate 14a via the coil spring 15u and the U-shaped support plate 15t, so that the vibration of the air vibrator 15w is amplified (resonated) and sieved. The apparatus main body 15a can be swung to exhibit a sieving function with a large amplitude.

  A powder guide mechanism 16 is provided at the lower end of the powder sieving mechanism 15 as shown in FIG. As shown in FIG. 24, the powder guide mechanism 16 includes a rectangular rectangular tube portion 16 a that covers the lower end of the sieving device main body 15 a while maintaining a predetermined distance, and a rectangular rectangular tube portion that opens to the vibration tray 3 a of the vibration feeder 3. The rectangular square tube portion 16b is smaller than 16a, and the rectangular pyramid tube portion 16c connects the rectangular square tube portions 16a and 16b. The powder guide mechanism 16 guides the powder falling from the mesh 15 h of the powder sieving mechanism 15 onto the vibration tray 3 a of the vibration feeder 3. The vibration feeder 3 vibrates the vibration tray 3a in the powder conveying direction, and leveles the powder cut from the powder cutting device 2 so as not to overlap in the vertical direction, and conveys it in a strip shape.

  The foreign matter inspection mechanism 4 has a translucent drum 21 formed of, for example, a milky white acrylic plate having translucency in which powder particles leveled and conveyed from the vibration feeder 3 are dropped on the outer peripheral surface and conveyed. And an illumination mechanism 23 for forming a linear illumination area 22 extending in the axial direction with respect to the powder on the rotating drum 21, and color image information of the linear illumination area 22 formed by the illumination mechanism 23. And a color line imaging device 24 for imaging in a line shape.

Then, the rotary drum is driven to rotate counterclockwise in FIG. 1 at a predetermined rotational speed (for example, about 40 min ⁻¹ ). For this reason, the rotating drum 21 receives the powder falling from the vibration tray 3a of the feeder 3 at the uppermost part thereof, conveys this powder counterclockwise, and rotates about 90 degrees through the non-defective product collection hopper 21u. And recovered in the non-defective product collection tank 5.
Further, the foreign matter that sucks and removes the particulate matter mixed with the foreign matter extending in the axial direction at the position facing the powder conveyed by the rotary drum 21 on the line-shaped illumination area 22 side from the powder slide position of the rotary drum 21. A suction nozzle 27 is provided. The foreign matter suction nozzle 27 is formed with an air curtain mechanism 27a for injecting air to the downstream side in the rotation direction of the rotary drum 21, as shown in an enlarged view in FIG.

The illumination mechanism 23 includes an outer illumination unit 31 disposed outside the rotating drum 21 and a dimming illumination unit 32 supported inside the rotating drum 21.
The dimming illumination unit 32 includes an illumination light source 32A capable of dimming light source colors composed of light emitting diodes of three colors RGB, which are the three primary colors of light, and the rotating drum 21 with respect to the line-shaped illumination region 22 described above. By irradiating the illumination light from the inside, the color of the granular material to be inspected and the color of the light-transmitting cylindrical portion 21a as the background are made the same color to prevent the background from being erroneously recognized as a foreign object.

Then, the line illumination area 22 illuminated by the illumination mechanism 23 is imaged in a line shape by a line imaging unit (not shown) of the color line imaging device 24, and the color line image information is output to the control device 40 described later.
The cyclone 6 has an output side connected to a coarse filter 8 a provided in the blower 8, and an input side connected to a foreign matter suction nozzle 27 and a granular material suction nozzle 28 for sucking unrecovered powder accumulated below the rotary drum 21. It has the structure made. Then, with the suction force of the blower 8, the particles and foreign particles collected by the foreign matter suction nozzle 27 and the powder suction nozzle 28 are sucked through the cyclone 6 and the uncollected powder is sucked into the cyclone 6. Separate solid and gas.

A neutral filter 9 is connected to the output side of the blower 8, and residual particles contained in the air are removed by the neutral filter 9 and released to the atmosphere.
Moreover, the non-defective product granular material collected in the non-defective product collecting tank 5 is stored in the hopper portion 5a on the upper side of the non-defective product collecting tank 5, and when a predetermined amount of non-defective powder is stored in the hopper portion 5a, the hopper portion The on-off valve 5b disposed on the lower side of 5a is controlled to be in an open state, dropped into the lower pressurizing chamber 5c, and the non-defective powder pressurized in the pressurizing chamber 5c is supplied to the mixing container 50, for example. Air transported.

  The control device 40 includes a programmable controller 41 that controls the powder conveyance speed of the feeder 3, the granular material conveyance speed of the rotary drum 21, and the foreign matter suction operation of the foreign matter suction nozzle 27, and the color line image captured by the color line imaging device 24. An image processing device 42 that performs image processing based on the information to inspect the foreign matter, a liquid crystal touch panel 43 that displays the result of foreign matter inspection and the like, and instructs the foreign matter inspection, a programmable controller 41, the image processing device 42, and the liquid crystal touch panel 43 And a management personal computer 44 for overall management.

  The image processing device 42 includes, for example, a microcomputer, and a color line image captured by the color line imaging device 24 in a state where non-defective powder composed of only non-defective powder is supplied to the rotary drum in advance. Information is converted into a three-dimensional color space such as RGB, HSI (HSL), and YUV, and a discrimination condition three-dimensional table corresponding to the distribution in the converted three-dimensional color space is generated. Then, when the granular material that is actually expected to be mixed with foreign substances is stored in the powder storage hopper 11 and placed on the rotating drum 21 via the vibration feeder 3, the color line imaging device 24 takes an image. . The captured color line image information is converted into a three-dimensional color space similar to the above, and when included in the normal distribution of the distribution and the determination condition three-dimensional table at that time, it is determined as non-defective and the determination condition three-dimensional A foreign substance inspection process for determining that a foreign substance is mixed when a distribution that is not included in the normal distribution of the table occurs is executed.

Next, the operation of the above embodiment will be described.
The open / close lid 11f of the powder storage hopper 11 is opened, and a predetermined volume of powder having high cohesiveness such as lactose powder, skim milk powder, corn starch, or the like to be inspected is charged, and then the open / close lid 11f is closed.
At this time, the rotational speed of the electric motor 14b of the roller drive mechanism 14 is adjusted according to the properties of the powder to be inspected, and the rotational speed of the cutting roller 12 is controlled to the optimum rotational speed, and the powder The mesh of the mesh 15h of the sieving mechanism 15 is selected as the optimum mesh and attached to the sieving portion 15i.

In a state where the powder to be inspected is stored in the powder storage hopper 11, pressurized air is supplied to the air vibrator 11h attached to the powder storage hopper 11 to vibrate the powder storage hopper 11 and stored. Prevent the body from solidifying.
In this state, the powder begins particle inspection, first, the electric motor 14b in the roller drive mechanism 14 of the powder cutting device 2 2000m ^-1 ~4000m inspected powder at a rotational speed range of ^-1 Drive control is performed at a rotational speed selected based on the properties, and pressurized air is supplied to the air vibrator 15w of the powder sieving mechanism 15 to generate vibration.

Therefore, the rotational force of the electric motor 14b is transmitted to the rotary shaft 12k through the spur gears 14d and 12q, and the cutting roller 12 is driven to rotate at a high speed in the clockwise direction in FIG.
Above the cutting roller 12, the powder to be inspected stored in the powder storage hopper 11 is inclined guide surface 13k of the cutting amount adjusting unit 13h and the inclined guide surface of the powder scraping unit 13i. The powder guided by 13r is contacted in an angle range of 120 °, for example. Since the powder storage hopper 11 is vibrated by the air vibrator 11h as described above to suppress the agglomeration of the stored powder, the cutting roller without the powder becoming agglomeration. 12 is contacted.

Since a large number of relatively shallow U-shaped grooves 12a are formed at equal intervals in the circumferential direction on the outer peripheral surface of the cutting roller 12, the cutting roller 12 is driven to rotate at high speed. As a result, the powder in contact with the cutting roller 12 passes through the gap between the outer peripheral surface of the cutting roller 12 and the vertical surface 13m of the cutting amount adjusting portion 13h as the cutting roller 12 rotates, and the horizontal surface. It flies diagonally downward by centrifugal force through the space part of the step part formed by 13n and the vertical surface 13o.
At this time, since the outer peripheral surface of the cutting roller 12 is roughened by the U-shaped groove 12a, slippage on the outer peripheral surface of the cutting roller 12 is suppressed and stable even if the powder is highly cohesive. The cutout can be performed in the state.

  The powder flying obliquely downward by the cutting roller 12 is guided by the inclined guide surfaces 15b and 15d of the powder sieving mechanism 15 and reaches the net 15h through the through holes 15f. In the powder sieving mechanism 15, the mounting flange 15s of the sieving device main body 15a is swingably supported on the support substrate 14a via an elastic support member 15v composed of a coil spring 15u and a U-shaped support piece 15t. Therefore, when pressurized air is supplied to the air vibrator 15w attached to the sieving device main body 15a to generate vibration, the sieving device main body 15a itself vibrates, and this vibration is caused by the coil spring 15u and the U-shaped support piece 15t. The sieving device main body 15a is greatly swung by being amplified (resonated) by elasticity, and the powder is sieved by the sieving mesh 15h, so that the powder larger than the mesh remains on the sieving mesh 15h, and the powder smaller than the mesh. The body falls downward.

The powder that has fallen below is guided by the inner surface of the rectangular pyramid cylinder portion 16c of the powder guide mechanism 16 and from the lower rectangular prism tube portion 16b onto the vibration tray 3a of the vibration feeder 3 in the width direction perpendicular to the conveying direction. It is dropped in a band shape.
When the vibration tray 3a is driven to vibrate, the powder dropped on the vibration tray 3a is leveled so as not to overlap in the vertical direction and is placed on the light-transmitting cylindrical portion 21a of the rotating drum 21 of the foreign matter inspection mechanism 4. By dropping, the powder can be transported in a state of riding on the translucent cylindrical portion 21a.

  When the granular material reaches the line-like bright region 22 irradiated with illumination light by the illumination mechanism 23, a color line image in which the granular material and the background are mixed is captured by the color line imaging device 24, and the captured color is captured. When the line image information is input to the image processing device 42, the foreign matter inspection process described above is performed by the image processing device 42, and the color line image information captured by the color line imaging device 24 is converted into a three-dimensional color space. When the distribution of the three-dimensional color space is included in the normal distribution of the discrimination condition three-dimensional table generated in advance, it is determined that the distribution is non-defective and there is a distribution that is not included in the normal distribution. Judge that foreign matter is mixed.

At this time, since the background and the powder are made the same color by the dimming illumination unit 32 in the dimming control process, when a foreign material having a color different from that of the granular material is mixed, the foreign material and the other background In addition, it is possible to accurately discriminate between the particles and the granular material, and the foreign matter inspection can be performed with high accuracy.
Moreover, since the illumination light source 32A of the dimming illumination unit 32 is illuminated from the inside of the translucent cylindrical part 21a, the surface color of the translucent cylindrical part 21a when viewed from the color line imaging device 24 is accurately adjusted. In addition, the illumination light emitted from the illumination light source 32A of the dimming illumination unit 32 does not irradiate the surface of the powder or foreign matter on the color line imaging device 24 side, so the color of the powder or foreign matter is changed. Accurate imaging can be performed.

When foreign matter is detected in the foreign matter inspection processing, the foreign matter can be reliably sucked by starting the suction operation with the foreign matter suction nozzle 27 immediately before the detected foreign matter reaches the foreign matter suction nozzle 27. .
The sucked foreign matter is solid-gas separated by the cyclone 6 and collected in the defective product collecting tank 7. The solid-gas separated air is removed to the atmosphere by removing the residual powder through the blower 8 by the neutral filter 9. Is done.

On the other hand, the non-contaminated non-contaminated product powder is not sucked by the foreign matter suction nozzle 27, so when it reaches the sliding position, it slides down from the translucent cylindrical portion 21a and is collected in the non-defective product collecting tank 5. .
The recovered non-defective powder particles are stored in the recovery hopper 5a, and when the storage amount reaches a predetermined value, the on-off valve 5b is opened and dropped into the lower pressurizing chamber 5c, and the on-off valve 5b is closed. The pressurizing chamber 5 c is pressurized and pneumatically transported to the mixing container 50.

As described above, according to the above embodiment, the cutting roller 12 whose outer peripheral surface of the powder cutting mechanism 13 disposed at the lower end of the powder storage hopper 11 is roughened by the U-shaped groove 12a is disposed. Therefore, even if the powder stored in the powder storage hopper 11 is a powder having strong cohesive properties such as lactose powder, skim milk powder, corn starch, etc., it can be stably cut out without agglomeration. it can. At this time, the cutting roller 12 is driven to rotate at a high speed in a rotational speed range of 2000 ^{−1 to} 4000 m ⁻¹ by the roller driving mechanism 14, whereby the powder that has passed through the cutting amount adjusting unit 13 h is peeled off by centrifugal force. It can be made to fly downward, and it can prevent that the powder with strong cohesion adheres to the cutting roller 12, and a thick layer is formed. Further, when the agglomerated powder is peeled off from the U-shaped groove 12a, the mass thereof is large, so that it crushes against the inner surface of the rectangular rectangular tube part 13b by centrifugal force and falls as a lump. This can be prevented. Furthermore, even if powder adheres to the cutting roller 12, the powder adhering to the outer peripheral surface of the cutting roller 12 can be scraped off by the powder scraping portion 13i.

  Since the powder sieving mechanism 15 is provided below the powder cutting mechanism 13, those having a large particle size are sieved by the sieving mesh 15h and stay on the sieving mesh 15h, and pass through the sieving mesh 15h. Only the powder that has passed through the powder guide mechanism 16 falls on the vibration tray 3a of the vibration feeder 3 as a band in the width direction perpendicular to the conveying direction, so that the lump is supplied to the foreign matter inspection mechanism 4. Can be reliably prevented.

  Here, in the powder sieving mechanism 15, a sieving net 15h is disposed inside a rectangular square cylindrical sieving device main body 15a, and the sieving device main body 15a includes a U-shaped support piece 15t and a coil spring 15u. Since it is swingably supported by the support substrate 14a as a fixed portion via the elastic support member 15v, the vibration generated by the air vibrator 15w is transmitted to the sieving device body 15a, and the vibration of the sieving device body 15a is transmitted. When amplified or resonated by the elastic support member 15v, the sieving device main body 15a is swung with a large amplitude, and the powder particles are sieved by the sieving net 15h.

In this way, the sieving device body 15a can be largely swung by simply mounting one air vibrator 15w as a vibration source on the outer surface of the sieving device body 15a, and the configuration of the entire sieving device can be simplified and miniaturized. And manufacturing cost can be reduced.
Further, the powder storage hopper 11, the powder cutting mechanism 13, the powder sieving mechanism 15 and the powder guide mechanism 16 are used when handling highly coherent powders such as lactose powder, skim milk powder, and corn starch. Although periodic cleaning is required, the powder cutting mechanism 13 and the powder sieving mechanism 15 are individually screwed to the support substrate 14a, and the powder storage hopper 11 is screwed to the powder cutting mechanism 13. Therefore, each part can be separated separately, and cleaning can be performed easily.

  Furthermore, when a powder having a low cohesiveness, such as a pharmaceutical raw material or food powder, is to be inspected, it is not necessary to provide the cutting roller 12, so the powder storage hopper 11 is removed from the powder cutting mechanism 13. At the same time, the powder cutting mechanism 13 itself is removed from the support substrate 14a, and instead of this, the cutting roller 12 is omitted, and the inclined guide portion having a shape in which the amount of inward protrusion of the powder scraping portion 13i is increased. It is only necessary to mount a powder cutting mechanism arranged opposite to each other while maintaining a predetermined distance on the support substrate 14a, and to mount the powder storage hopper 11 on this powder cutting mechanism. Accordingly, the foreign matter inspection of various powders having different properties can be performed only by replacing the powder cutting mechanism 13 according to the above.

In the above embodiment, the case where the powder cutting mechanism 13 has the cutting roller 12 to cut out the powder has been described. However, the present invention is not limited to this, and any other arbitrary screw feeder or the like can be used. A granular material cutting apparatus can be applied and a granular material can be cut out.
In the above embodiment, the case where the power transmission between the roller driving mechanism 14 and the rotating shaft 12k of the cutting roller 12 is performed via the spur gears 12q and 14d has been described. However, the present invention is not limited to this. In addition, other gear mechanisms such as a helical gear and a bevel gear, and an arbitrary power transmission mechanism such as an endless chain and a sprocket can be applied.

Furthermore, in the said embodiment, although the case where the air vibrators 11h and 15w were mounted | worn with the powder storage hopper 11 and the powder sieving mechanism 15 was demonstrated, it is not limited to this, A mechanical vibrator and other Arbitrary vibrators can be applied.
Moreover, in the said embodiment, although the case where the sieving apparatus main body 15a was formed in the rectangular rectangular tube shape was demonstrated, it is not limited to this, The structure which can throw in a granular material and can install the sieving net | network 15h If it is, it can be set as arbitrary shapes.
In the above embodiment, the case where the elastic support member 15v is constituted by the U-shaped support piece 15t and the coil spring 15u has been described. However, the present invention is not limited to this, and the sieving device main body only by the coil spring 15u. 15a may be supported, or may be supported by other elastic bodies such as bamboo springs and leaf springs so as to be swingable.

In the above embodiment, the foreign matter suction nozzle 27 is arranged in a line shape, and the powder particles in the foreign matter mixed region are sucked in a line shape. However, the present invention is not limited to this. Since the foreign substance mixing position can be detected from the color line image information imaged by the device 24, the granular material may be sucked in a predetermined range including the foreign substance mixing position. For this purpose, the foreign matter suction nozzle 27 may be divided into predetermined regions in the axial direction of the rotary drum 21 or a plurality of suction regions may be formed in the foreign matter suction nozzle 27 in the axial direction.
Furthermore, the foreign matter inspection mechanism 4 is not limited to the above configuration, and a foreign matter inspection mechanism having an arbitrary configuration can be applied as long as foreign matter mixed in the powder can be detected.
Furthermore, the granular material sieving apparatus according to the present invention is not limited to being applied to a granular material foreign matter inspection apparatus, and can be applied to any apparatus that handles other granular materials.

  DESCRIPTION OF SYMBOLS 1 ... Color particle foreign material inspection apparatus, 2 ... Powder cutting apparatus, 3 ... Vibrating feeder, 3a, 3b ... Vibrating conveyor, 4 ... Foreign substance inspection mechanism, 5 ... Non-defective product collection tank, 6 ... Cyclone, 7 ... Defective product Recovery tank, 8 ... Blower, 9 ... Neutral filter, 10 ... Housing, 11 ... Powder storage hopper, 11g ... Powder capacity sensor, 11h ... Air vibrator, 12 ... Cutting roller, 12a ... U-shaped groove, 12k ... rotating shaft, 12q ... spur gear, 13 ... powder cutting mechanism, 13h ... cutting amount adjusting unit, 13i ... powder scraping unit, 14 ... roller driving mechanism, 14a ... support substrate, 14b ... electric motor, 14c ... Rotating shaft, 14d ... Spur gear, 15 ... Powder sieving mechanism, 15a ... Sieving device body, 15h ... Mesh, 15i ... Sieving part, 15s ... Mounting flange part, 15t ... U-shaped support piece, 15u ... Spring coil , 15v ... elastic support part 15 ... Air vibrator, 16 ... Powder guide mechanism, 21 ... Rotating drum, 23 ... Illumination mechanism, 24 ... Color line imaging device, 27 ... Foreign matter suction nozzle, 31 ... Outer illumination unit, 31A ... First illumination unit, 31B ... second illumination unit, 32 ... light control illumination unit, 32A ... illumination light source, 40 ... control device, 41 ... programmable controller, 42 ... image processing device, 43 ... liquid crystal touch panel, 44 ... PC for management, 50 ... mixing container

Claims (5)

A granular material supply mechanism for supplying the stored granular material;
A sieving device main body in which the granular material supplied from the granular material supply mechanism is charged and screened by a sieving net;
An elastic support member for elastically supporting the sieving device main body to the fixed portion;
A vibration generating source that is mounted on the sieving device body and transmits vibration;
A powder transport mechanism for leveling while transporting the sifted powder from the sieving device body;
A foreign matter inspection mechanism for inspecting foreign matter mixed in the powder supplied from the powder transport mechanism;
An apparatus for inspecting a foreign material for a granular material, comprising:   The elastic support member amplifies the vibration generated in the vibration generation source by a support piece fixed to a support substrate and an elastic body interposed between the support piece and the screen device main body, and the screen device The granular foreign material inspection apparatus according to claim 1, further comprising a structure that supports the main body so as to swing.   The granular material foreign matter inspection apparatus according to claim 1, wherein the vibration generation source includes a vibrator attached to at least one outer surface of the sieving device main body.   The granular material foreign matter inspection apparatus according to claim 3, wherein the vibrator is an air vibrator that generates vibration by supplying pressurized air. The foreign matter inspection mechanism is
A rotating drum that receives the granular material falling from the granular material conveying mechanism at the outer peripheral surface and conveys it to the sliding position;
An illumination mechanism that illuminates at least the rotary drum with a predetermined illumination region extending in the axial direction between the powder particle fall position of the rotary drum and the sliding position;
A line imaging device for imaging powder illuminated by the illumination mechanism;
6. A granular material according to claim 1, further comprising: a foreign matter contamination detection device that detects foreign matter contamination based on powder image information captured by the line imaging device. Foreign matter inspection device.

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