WO2013069736A1 - Granule inspection device - Google Patents

Granule inspection device Download PDF

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Publication number
WO2013069736A1
WO2013069736A1 PCT/JP2012/078998 JP2012078998W WO2013069736A1 WO 2013069736 A1 WO2013069736 A1 WO 2013069736A1 JP 2012078998 W JP2012078998 W JP 2012078998W WO 2013069736 A1 WO2013069736 A1 WO 2013069736A1
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WO
WIPO (PCT)
Prior art keywords
light
illumination
light receiving
detection location
detection
Prior art date
Application number
PCT/JP2012/078998
Other languages
French (fr)
Japanese (ja)
Inventor
砂畠睦巳
池田直人
山崎祐一
岡村真徳
Original Assignee
株式会社クボタ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2011245812A external-priority patent/JP6128730B2/en
Priority claimed from JP2012239404A external-priority patent/JP6153311B2/en
Priority claimed from JP2012239405A external-priority patent/JP6157086B2/en
Application filed by 株式会社クボタ filed Critical 株式会社クボタ
Priority to KR1020147014965A priority Critical patent/KR101683065B1/en
Priority to CN201280055104.1A priority patent/CN103907013B/en
Publication of WO2013069736A1 publication Critical patent/WO2013069736A1/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84Systems specially adapted for particular applications
    • G01N21/85Investigating moving fluids or granular solids
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84Systems specially adapted for particular applications
    • G01N21/85Investigating moving fluids or granular solids
    • G01N2021/8592Grain or other flowing solid samples

Definitions

  • the present invention provides a transfer means for transferring a granular material group as an inspection object so as to pass through a detection location, an illumination means for illuminating the detection location, a light receiving means for receiving light from the detection location, Determining means for determining whether the received light amount of the light receiving means is out of an appropriate light amount range corresponding to a normal object, whether it is a normal object or an abnormal object, and the illuminating means includes an illumination light source and
  • the present invention also relates to a granular material inspection apparatus including a diffusion transmission member that transmits light emitted from the illumination light source toward the detection portion as diffused light.
  • the light from the detection point is in the state of being close to the light receiving path guided to the light receiving unit of the light receiving unit and distributed to the upper and lower side parts of the light receiving path as the illumination light source.
  • a fluorescent lamp is provided, and between the fluorescent lamp and the detection location, as the diffuse transmission member, a plate-like diffusion that transmits light projected from the fluorescent lamp toward the detection location as diffused light and guides it to the detection location It was the structure with which a board was equipped (for example, refer patent document 1).
  • an inspection object for example, a resin pellet having a glossy portion or a curved surface portion with a small curvature on the surface, etc.
  • an inspection object for example, a resin pellet having a glossy portion or a curved surface portion with a small curvature on the surface, etc.
  • the surface as described above is glossed by illuminating the detection portion with diffused light instead of directly irradiating the detection portion with illumination light emitted from an illumination light source such as a fluorescent lamp.
  • the conventional configuration irradiates the inspection object with diffused light, there is less possibility that strong reflected light is partially generated from the granular material group.
  • a transparent detection object such as a transparent resin pellet, In some cases, there is a possibility that discrimination by the discrimination means cannot be performed properly, and there is still room for improvement.
  • the illumination light source is provided in a state approaching the light receiving path guided from the detection location to the light receiving portion, and for the inspection target located at the detection location, the light receiving portion in the detection target.
  • the light is irradiated in a direction substantially along the light receiving path with respect to the side surface on the light receiving target side.
  • the irradiated light is not only reflected on the surface of the inspection object, but, for example, in a state where it is refracted while passing through the inside of the transparent resin pellet as the inspection object and changed in a different direction. It may be emitted and received by the light receiving means.
  • the intensity of light is received as light reception information received by the light receiving unit.
  • Information with a particularly bright part or a shadow part with a low light intensity may be obtained, and even though it is a normal inspection object, a part with a high light intensity or a light intensity may be obtained.
  • the light amount of the shadow portion with a small thickness is out of the appropriate light amount range and is erroneously determined as an abnormal object, and there is a possibility that the inspection object cannot be properly determined by the determining means.
  • An object of the present invention is to provide a granular material inspection apparatus capable of satisfactorily determining whether it is a normal object or an abnormal object even when a transparent granular material group is used as a detection target. The point is to provide.
  • the first characteristic configuration of the present invention is configured to receive a light from the detection location, a transfer means for transferring the granular material group as the inspection object so as to pass through the detection location, an illumination means for illuminating the detection location, and A light receiving unit; and a determination unit that determines whether the received light amount of the light receiving unit is normal or abnormal depending on whether the amount of light received from the light receiving unit is out of an appropriate light amount range corresponding to a normal object.
  • the diffusing and transmitting member in the illuminating means is provided in a state of forming a convex curved surface that curves in a convex shape toward the outer side away from the detection location, and the illumination light source is outward from the diffusing and transmitting member. Since the light source for illumination is provided at the side location along the convex curved surface of the diffusive transmitting member, the illumination light source is directed from the location different from the location along the convex curved surface curved to the detection location to the detection location. Light is emitted, and the light emitted from the illumination light source is transmitted as diffused light by the diffusing and transmitting member and irradiated to the detection portion.
  • the illumination light source irradiates the detection location with light from different directions so that the light irradiation path toward the detection location is positioned substantially radially around the detection location. Transmits and diffuses light in various directions, such as irradiating light in a direction substantially along the light passage path guided to the means, and irradiating light in a direction substantially perpendicular to the light passage path. In this state, it is possible to irradiate the detection location.
  • the light illuminated by the irradiating means is in a state of being diffused substantially uniformly over a wide range of the outer peripheral portion of the inspection object, so that a normal inspection object (resin pellet) having the same transparency in all regions If so, the light receiving information received by the light receiving means does not cause a particularly bright part having a large light intensity or a shadow part having a small light intensity, and the risk of erroneous determination is small.
  • the illumination light source is configured to include a plurality of light emitting units in a state of being arranged along the convex curved surface, and an illumination light amount adjusting unit capable of individually changing and adjusting the light amounts of the plurality of light emitting units. It is suitable if it is provided.
  • the illumination light source includes a plurality of light emitting units arranged in a line along the convex curved surface, and the light amount of the plurality of light emitting units can be changed and adjusted individually by the illumination light amount adjusting unit. It is.
  • the light amounts of the multiple light emitting units are changed individually. By adjusting, it becomes possible to irradiate the inspection target located at the detection location with the same amount of light in a state of being diffused substantially uniformly over a wide range.
  • the amount of light applied to the inspection object can be adjusted to the same amount by a plurality of light receiving units, thereby avoiding the disadvantage that the determination unit misidentifies due to the difference in the light amounts of the plurality of light receiving units. As a result, it is possible to better determine whether the product is normal or abnormal.
  • the transfer means transfers the granular material group in a single layer state and spreads in the horizontal width direction along the moving drop path, and extends along the horizontal width direction in the middle of the moving drop path.
  • the detection unit is configured to pass through, and the illumination unit includes one side illumination unit provided on one side of the moving fall path, and the other side illumination unit provided on the other side of the movement fall path.
  • the diffuse transmission member in the one-side illuminating means has the convex curved surface that curves convexly outward from the detection location toward the one side and extends substantially in the lateral width direction.
  • the diffuse transmission member in the other side illumination means has a convex curved surface that curves in a convex shape from the detection location toward the other side outward and is oriented in the lateral width direction.
  • a convex curved surface that curves in a convex shape from the detection location toward the other side outward and is oriented in the lateral width direction.
  • the transfer means is in a state in which the granular material group as the inspection object is in a single layer state and extends in the horizontal width direction, and passes through a detection location provided in a state extending along the horizontal width direction. Move along the moving drop path.
  • the detection location is provided in a state extending along the lateral width direction, and the inspection is performed while simultaneously transferring the plurality of granular material groups in a side-by-side state, so that a large amount of inspection objects can be processed efficiently.
  • the detection location is illuminated from both sides by the one side illumination means provided on one side of the moving fall path and the other side illumination means provided on the other side of the movement fall path.
  • the one side surface and the other side surface of the body group can be illuminated together, and the substantially entire area of the outer peripheral portion of the granular body group can be well illuminated with the uniformly diffused light.
  • the diffuse transmission member in the one side illumination means has a convex curved surface that curves convexly from the detection location toward the one side outward and is formed in a substantially semi-cylindrical shape extending in the lateral width direction, and the other side illumination.
  • the diffuse transmission member in the means has a convex curved surface that curves convexly from the detection location toward the outside of the other side, and is formed in a substantially semi-cylindrical shape extending in the horizontal width direction.
  • a convex curved surface that curves in a convex manner toward the outside can be formed at any position in the longitudinal direction, and light diffused in the same way can be formed. It can be irradiated well.
  • the plurality of light emitting units provided in a state of being arranged along the convex curved surface in the illumination light source has the same or substantially the same width as the width along the horizontal width direction of the detection portion. It is preferable that the apparatus is composed of a long line illumination device.
  • a plurality of light-emitting units each including a linear illumination device that is long in the lateral width direction are arranged in a state of being aligned along the convex curved surface of the illumination light source. Is provided in a state having a width that is the same as or substantially the same as the width along the horizontal width direction. Can be irradiated with diffused light.
  • a projection member that projects light toward the light receiving unit from a position opposite to the light receiving unit of the detection position in the light receiving direction of the light receiving unit, and a background light amount capable of changing and adjusting the light amount of the projection member It is preferable that an adjusting means is provided.
  • the light is directed toward the light receiving means at a position opposite to the light receiving means in the light receiving direction of the light receiving means, that is, when the detection position is viewed from the light receiving means. Is provided, and the light quantity of the projection member can be changed and adjusted by the background light quantity adjusting means.
  • the light intensity of the projection member is adjusted to the same light intensity as that obtained from the inspection object as a normal object, and the appropriate light intensity range is set for the light intensity by the light receiving means, the light intensity of the background is measured. Even if the abnormal object exists as the inspection object, it is possible to determine that the light amount is out of the appropriate light amount range and is an abnormal object.
  • the amount of light obtained from the inspection object as a normal object differs if the type of inspection object is different, it can be handled by changing and adjusting the light amount of the projection member to match that light amount, For example, each time the type of inspection object is different, there is no need for the trouble of changing to a projection member having a different amount of light, and the convenience is improved.
  • the second characteristic configuration of the present invention is configured to receive a light from the detection point, a transfer unit that transfers the granular material group as the inspection target so as to pass through the detection point, an illumination unit that illuminates the detection point, and the like.
  • a light receiving unit having a light receiving unit, and a determination unit that determines whether the received light amount of the light receiving unit is normal or abnormal depending on whether or not the amount of light received outside a proper light amount range corresponding to a normal product
  • the illumination means includes an illumination light source, and a diffusion transmission member that transmits light emitted from the illumination light source toward the detection location as diffused light, and the diffusion transmission member is removed from the detection location.
  • the light receiving unit is A receiving path for receiving the point lies in that is provided with a transparent member which division processing film provided for dividing process incident light toward the detection position in the reflected light and transmitted light.
  • the incident light incident on the split processing film in the direction toward the detection location is split by the split processing film into reflected light that does not reach the detection location and transmitted light that reaches the detection location. Even if a dark spot occurs in the lens of the light receiving unit, the dark spot is difficult to be reflected on the inspection object located at the detection spot.
  • the lens aperture in the light receiving unit Can be imaged by the light receiving unit in a state where is adjusted to the closed side, that is, in a state where the depth of field is high.
  • the inspection object By irradiating light that is diffused substantially uniformly over such a wide range, for example, even for a transparent inspection object such as a transparent pellet, the inspection object positioned at the detection location
  • the light illuminated by the irradiating means is in a state of being almost uniformly diffused over a wide range of the outer peripheral portion of the inspection object, and it is difficult to reflect the dark spot of the lens in the light receiving unit on the inspection object.
  • the imaging by the light receiving unit can be performed in a state where the depth of field is high, if the normal inspection object (resin pellet) has the same transparency in all regions, the light receiving information received by the light receiving means is light. In particular, there is no possibility that a bright part having a large intensity or a shadow part having a small light intensity or the like is generated, and the possibility of erroneous determination is reduced.
  • the third characteristic configuration of the present invention is configured to receive a light from the detection portion, a transfer means for transferring the granular material group as the inspection object so as to pass through the detection portion, an illumination means for illuminating the detection portion, and the like.
  • a light receiving unit having a light receiving unit, and a determination unit that determines whether the light received by the light receiving unit is normal or abnormal depending on whether the amount of received light is out of an appropriate light amount range corresponding to a normal object
  • the illuminating means includes an illumination light source, and a diffusion transmission member that transmits light emitted from the illumination light source toward the detection location as diffused light, and the outside that separates the diffusion transmission member from the detection location It is provided with a state where it is formed in a convex curved surface that curves convexly toward the side, and the illumination light source is provided in a state located along the convex curved surface at a location on the outer side than the diffuse transmission member, The light receiving part and the diffuse transmission Between the wood, in gran
  • the diffusing and transmitting member in the illuminating means is provided in a state of forming a convex curved surface that curves in a convex shape toward the outer side away from the detection location, and the illumination light source Is provided in a state of being located along the convex curved surface of the diffusing and transmitting member at a location on the outer side of the diffusing and transmitting member. It is possible to irradiate light from locations different from each other along the convex curved surface, such as light in a direction substantially perpendicular to the direction along the light receiving path, as well as light in a direction substantially along the light receiving path.
  • the inspection object located at the detection location can be irradiated with light that is uniformly diffused over a wide range.
  • the lens hood means it is easy to avoid the oblique light such as reflected light reflected from the diffuse transmission member toward the side where the light receiving unit is located into the light receiving unit by the lens hood means. That is, it is difficult for light other than the light from the detection portion to enter the light receiving unit, and it is easy to clearly image the inspection object in the light receiving unit.
  • the inspection object positioned at the detection location By irradiating light that is diffused substantially uniformly over such a wide range, for example, even for a transparent inspection object such as a transparent pellet, the inspection object positioned at the detection location
  • the light illuminated by the irradiating means is in a state of being diffused substantially evenly over a wide range of the outer peripheral portion of the inspection object, and light from an oblique direction does not easily enter the light receiving portion, so that the imaging is clear.
  • the light receiving information received by the light receiving means is a particularly bright part or a light intensity with a large light intensity. There is no risk of small shadows or the like, and there is little risk of misjudgment.
  • the fourth characteristic configuration of the present invention is configured to receive a light from the detection portion, a transfer means for transferring the granular material group as the inspection object so as to pass through the detection portion, an illumination means for illuminating the detection portion, and the like.
  • a light receiving unit having a light receiving unit, and a determination unit that determines whether the received light amount of the light receiving unit is normal or abnormal depending on whether or not the amount of light received outside a proper light amount range corresponding to a normal product
  • the illumination means includes an illumination light source, and a diffusion transmission member that transmits light emitted from the illumination light source toward the detection location as diffused light, and the diffusion transmission member is removed from the detection location.
  • the light receiving unit is provided with the detection A receiving path for receiving from where, provided the transparent member which division processing film provided for dividing process incident light toward the detection position in the reflected light and transmitted light,
  • the lens hood means for the light receiving part is provided between the light receiving part and the diffuse transmission member.
  • the diffusing and transmitting member in the illuminating means is provided in a state of forming a convex curved surface that curves in a convex shape toward the outer side away from the detection location, and the illumination light source Is provided in a state of being located along the convex curved surface of the diffusing and transmitting member at a location on the outer side of the diffusing and transmitting member. It is possible to irradiate light from locations different from each other along the convex curved surface, such as light in a direction substantially perpendicular to the direction along the light receiving path, as well as light in a direction substantially along the light receiving path.
  • the inspection object located at the detection location can be irradiated with light that is uniformly diffused over a wide range.
  • the incident light incident on the split processing film in the direction toward the detection location is reflected light that does not reach the detection location by the split processing film, and transmitted light reaches the detection location. Therefore, even if a dark spot occurs in the lens of the light receiving part, it is easy to avoid the object to be reflected in the light receiving part as having a dark part, and the depth of field is high.
  • the image can be taken by the light receiving unit.
  • the lens hood means avoids obliquely incident light such as reflected light reflected from the diffuse transmission member toward the side where the light receiving unit is located. It is easy to make clear the imaging of the inspection object in the light receiving unit.
  • the inspection object By irradiating light that is diffused substantially uniformly over such a wide range, for example, even for a transparent inspection object such as a transparent pellet, the inspection object positioned at the detection location
  • the light illuminated by the irradiating means is in a state of being almost uniformly diffused over a wide range of the outer peripheral portion of the inspection object, and it is difficult to reflect the dark spot of the lens in the light receiving unit on the inspection object.
  • the imaging with the light receiving unit can be performed with a high depth of field, and further, it is difficult for light from an oblique direction to enter the light receiving unit, and it is easy to make the imaging clear, so normal inspection objects having the same transparency in all areas If it is an object (resin pellet), the light receiving information received by the light receiving means is not misidentified as there is no possibility that a particularly bright part having a high light intensity or a shadow part having a low light intensity may occur. It becomes what it is small.
  • the split processing film is provided on a side surface of the light transmitting body facing the detection portion, and an antireflection film is provided on a side surface of the light transmitting body facing the light receiving portion.
  • the split processing film forms the side surface of the light transmitting body in a mirror shape and easily generates reflected light toward the light receiving unit. According to this structure, generation
  • the light transmitting body provided with the divided processing film is provided, and it is easy to avoid the dark spot of the lens in the light receiving unit from appearing on the inspection object, but the light receiving body receives light from the light transmitting body. Generation of reflected light toward the side where the part is located can be suppressed, and light entering the light receiving part from an oblique direction can be suppressed.
  • the lens hood means includes a hood tube portion through which the light receiving path passes, and a light shielding plate portion positioned at a location between the light receiving portion and the illumination light source on the outer periphery of the hood tube portion. It is preferable to be configured.
  • the hood tube part effectively prevent oblique light from entering the light receiving unit, but also reflected light from a wide area around the hood tube part can enter the light receiving unit. This can be effectively avoided by the light shielding plate.
  • the light-shielding plate portion includes a reflection portion that generates reflected light toward the detection location.
  • the light that leaks or is reflected from the illumination light source or the diffuse transmission member to the side where the light receiving unit is located can be reflected toward the detection location by the reflection unit, and can be used for illumination of the inspection object.
  • the light that has exited from the illumination light source and leaked or reflected to the side where the light receiving unit is located can be used for illumination of the inspection object without waste.
  • a pair of each of the illumination light source, the diffusive transmission member, and the light receiving unit is disposed in a state of sandwiching a portion including the detection location in a moving and falling path along which the inspection target moves and drops. It is.
  • one side portion in a direction intersecting the moving and dropping direction of the inspection target located at the detection location is illuminated with one of the pair of illumination light source, diffuse transmission member, and light receiving portion.
  • the other side in the direction intersecting the moving and dropping direction of the inspection object located at the detection location can be inspected by the action of the light source for light, the diffuse transmission member and the light receiving portion. And the other illumination light source, diffuse transmission member, and light receiving portion of the light receiving portion.
  • the entire inspection object can be inspected appropriately by the action of the pair of illumination light source, diffuse transmission member and light receiving portion.
  • the fifth characteristic configuration of the present invention is configured to receive a light from the detection point, a transfer unit that transfers the granular material group as the inspection target so as to pass through the detection point, an illumination unit that illuminates the detection point, and the like.
  • An object to be inspected provided in a state of being formed into a convex curved surface that is curved in a convex shape, and provided with the illumination light source in a state of being located along the convex curved surface at a location on the outer side of the diffuse transmission member Moving drop where things move and fall
  • the detection is performed at a location located on a lateral side of a portion including the detection location in the path, and located on a lateral side of the diffuse transmission member in a direction intersecting a light receiving direction of the light receiving means. This is in that a reflecting member for generating reflected light toward the place is provided.
  • the following operational effects are provided in addition to the operational effects of the first characteristic configuration.
  • the light that leaks from the detection location to the lateral outside is reflected by the reflecting member toward the detection location, and is the lateral side portion of the inspection object, and the light from the illumination means is difficult to hit and is received.
  • the side part which is easy to be reflected in the light receiving part in the dark state is not illuminated.
  • the light emitted from the illumination light source to the detection location and leaking from the detection location to the lateral outside can be used for illumination of the lateral side of the inspection object that is dark and easily reflected.
  • the inspection object By irradiating light that is diffused substantially uniformly over such a wide range, for example, even for a transparent inspection object such as a transparent pellet, the inspection object positioned at the detection location
  • the light illuminated by the irradiating means is in a state of being diffused substantially uniformly over a wide range of the outer peripheral portion of the inspection object, and can illuminate the lateral side portion of the inspection object that is dark and easily reflected, If it is a normal inspection object (resin pellet) having the same transparency in all areas, the light receiving information received by the light receiving means is a particularly bright part with a large light intensity or a shadow with a small light intensity. There is no possibility of occurrence of a portion or the like, and there is little risk of erroneous determination.
  • a sixth characteristic configuration of the present invention is configured to receive a light from the detection part, a transfer means for transferring the granular material group as the inspection object so as to pass through the detection part, an illuminating unit that illuminates the detection part, and the like.
  • the illumination light source is in a state along the convex curved surface at a position on the outer side of the diffuse transmission member, and the inspection object is provided.
  • Moving and falling path of moving and falling The upper-side light-emitting portion that is configured to include a plurality of light-emitting portions in a state of being aligned in the moving direction of the inspection object in the portion including the detection location, and is located on the upper side of the inspection-object moving direction among the plurality of light-emitting portions
  • the diffusing and transmitting member in the illuminating means is provided in a state of forming a convex curved surface that curves in a convex shape toward the outer side away from the detection location, and the illumination light source Is provided in a state of being located along the convex curved surface of the diffusing and transmitting member at a location on the outer side of the diffusing and transmitting member, so that the light receiving path guided to the light receiving means for the inspection object located at the detecting location It is possible to irradiate light from locations different from each other along the convex curved surface, such as light in a direction substantially perpendicular to the direction along the light receiving path, as well as light in a direction substantially along the light receiving path.
  • the inspection object located at the detection location can be irradiated with light that is uniformly diffused over a wide range.
  • the emitted light is the Since it is set to be narrower than the irradiation range of the middle issuer that hits the middle part, it avoids the occurrence of halation and receives light in the state where the upper and lower ends are dark despite being a normal inspection object. It can be prevented from being reflected in the means.
  • the surface shape of the intermediate portion of the pellet located at the detection location is a horizontally convex arc or curved shape, the light hitting the intermediate portion of the pellet is easily reflected toward the light receiving means.
  • the surface shape of the upper end portion of the pellet located at the detection location is an upwardly convex arc or curved shape, or a shape close thereto, and the surface shape of the lower end portion of the pellet located at the detection location is convex downward.
  • the emitted light hits the intermediate part of the inspection object, and the emitted light hits the irradiation range of the upper light emitting part where the emitted light hits the upper end of the inspection object and the lower light emitting part where the emitted light hits the lower end of the inspection object. Since it is set to be narrower than the irradiation range of the middle issuer, the upper side light emitting part and the lower side light emitting part should emit strong light that is more concentrated than the middle issue part toward the upper and lower ends of the inspection object. Thus, there is no difference in intensity between the reflected light from the upper end and the lower end of the inspection object toward the light receiving means and the intensity of the reflected light from the intermediate part of the inspection object toward the light receiving means.
  • the narrow irradiation range that is the same as the irradiation range of the upper-side light-emitting unit and the lower-side light-emitting unit set so that the reflected light from the upper end and lower end of the object to be inspected to the light-receiving means has an appropriate intensity.
  • the middle issuer is provided, halation is likely to occur due to the intense light intensively hitting the intermediate part of the inspection object.
  • the occurrence of halation can be avoided because the irradiation range of the middle issuer is wider than the irradiation range of the upper light emitting unit and the lower light emitting unit.
  • the inspection object By irradiating light that is diffused substantially uniformly over such a wide range, for example, even for a transparent inspection object such as a transparent pellet, the inspection object positioned at the detection location
  • the light illuminated by the irradiating means is in a state of being diffused substantially evenly over a wide range of the outer peripheral portion of the inspection object, and illumination of the upper end and lower end of the inspection object that is dark and easily reflected Since it is effective and can avoid the halation in the intermediate part, if it is a normal inspection object (resin pellet) having the same transparency in all regions, the light intensity is received as light reception information received by the light receiving means. In particular, there is no possibility that a particularly bright part having a large light or a shadow part having a small light intensity will be generated, and there is less possibility of erroneous determination.
  • the seventh characteristic configuration of the present invention is configured to receive a light from the detection part, a transfer means for transferring the granular material group as the inspection object so as to pass through the detection part, an illumination means for illuminating the detection part, and the like.
  • a reflective member that generates reflected light toward the detection location is provided at a location located on the lateral side of the diffuse transmission member in a direction in which the illumination light source is located on the outer side of the diffusion transmission member.
  • a plurality of light emitting units are arranged in a state along the convex curved surface and arranged in a moving direction of the inspection target in the part of the moving drop path, and the inspection target of the plurality of light emitting units
  • the upper-side light emitting unit and the lower-side light emission of the plurality of light-emitting units are set as the irradiation range of the upper-side light emitting unit located on the upper side in the moving direction and the lower-side light emitting unit located on the lower side in the moving direction of the inspection object. This is in the point set narrower than the irradiation range of the middle light emitting portion located between the two.
  • the diffusing and transmitting member in the illumination means is provided in a state of forming a convex curved surface that curves convexly toward the outer side away from the detection location, Since the illumination light source is provided at a location on the outer side of the diffuse transmission member along the convex curved surface of the diffusion transmission member, the light source is guided to the inspection object located at the detection location. Irradiate light from locations that are different from each other along a convex curved surface, such as light in a direction substantially perpendicular to the direction along the light passage path, as well as light in a direction substantially along the light passage path. Therefore, it is possible to irradiate light that is uniformly diffused over a wide range with respect to the inspection object positioned at the detection location.
  • the light that leaks from the detection location to the laterally outer side is reflected by the reflecting member toward the detection location, and the lateral side of the inspection object It is a part that illuminates the side part that is difficult to receive light from the illumination means and is not directed to the light receiving part, and is easily reflected in the light receiving part in a dark state, and is emitted from the light source for illumination to the detection point.
  • the light that is about to leak laterally outward from the detection location can be used for illumination of the lateral side portion of the inspection object that is dark and easily reflected.
  • the light emitted from the irradiation range of the upper-side light emitting portion where the emitted light hits the upper end portion of the inspection object and the lower-side light emitting portion where the emitted light hits the lower end portion of the inspection object Is set to be narrower than the irradiation range of the middle issuer which hits the middle part of the inspection object, the upper light emitting part and the lower light emitting part emit more concentrated light than the middle issue part and the upper end part of the inspection object.
  • it is a normal inspection object, it can be prevented from being reflected on the light receiving means in the state where the upper end and the lower end are dark, and the occurrence of halation in the inspection object can be prevented. Can be avoided.
  • the inspection object By irradiating light that is diffused substantially uniformly over such a wide range, for example, even for a transparent inspection object such as a transparent pellet, the inspection object positioned at the detection location
  • the light illuminated by the irradiating means is in a state of being diffused substantially evenly over a wide range of the outer peripheral portion of the inspection object, and the illumination of the upper and lower ends of the inspection object that is dark and easily reflected Can effectively illuminate the lateral side of the inspection object that is dark and easy to be reflected, so that it is possible to effectively illuminate the upper and lower ends of the inspection object that is easily dark and visible in the middle part.
  • a normal inspection object resin pellet having the same transparency in all areas has a particularly high light intensity as light reception information received by the light receiving means.
  • Fear have parts or of the light intensity is small shaded area or the like is generated there is no fear of erroneous determination becomes what is small.
  • the illumination unit, the diffusing and transmitting member, and a storage case that stores a portion of the moving drop path are provided, and the reflection member is disposed between a side cover in the storage case and the portion of the moving drop path. It is suitable if it is deployed in.
  • the reflecting member is located at a location closer to the detection location than the side cover in the storage case, and light that leaks from the detection location to the lateral side is detected at a location near the detection location. Reflect towards That is, it is possible to effectively perform illumination of the lateral side portion of the inspection object by the reflected light.
  • the reflected light can be used for effective illumination of the lateral side portion of the inspection object, and the reflection of the inspection object on the light receiving portion can be improved.
  • a separating means for separating the inspection object from the detection position into a normal object and an abnormal object and flying the separated abnormal object or normal object is provided below the detection area, and above the separating means. It is preferable to provide a lower first reflecting member that generates reflected light toward the detection location.
  • the light that attempts to escape downward from the detection location is not reflected by the separation means and is not reflected in an inappropriate direction, so that the light is reflected by the lower first reflection member at the location above the separation means. It can be used to illuminate the object to be inspected.
  • the light that leaks downward from the detection point can be used for illumination of the inspection object without waste, and the reflection of the inspection object on the light receiving means can be improved.
  • a guide body is provided below the detection location to guide the abnormal or normal material that has been blown off by the separating means so as to drop to the recovery unit, and the reflection toward the detection location is provided above the guide body. It is preferable to provide a lower second reflecting member that generates light.
  • the light that attempts to escape downward from the detection location is not reflected by the guide body and is not reflected in an inappropriate direction. It can be used to illuminate the object to be inspected.
  • the light that leaks downward from the detection point can be used for illumination of the inspection object without waste, and the reflection of the inspection object on the light receiving means can be improved.
  • the first embodiment of the granular material inspection apparatus performs a determination process as to whether it is normal or abnormal and a separation process thereof while transferring a large number of resin pellets as inspection objects. The case will be described with reference to the drawings.
  • a shooter 1 having an inclined posture for guiding the pellet group k to flow down in a single layer and in a wide state so as to pass the detection point J, and from a storage hopper 2 provided on the upper side of the shooter 1. While the pellet group k conveyed and supplied by the vibration feeder 3 is caused to flow down the upper surface of the shooter 1, the normal product and the abnormal product can be selected and separated from each other.
  • the storage hopper 2 that is supplied and stored with the pellet group k from the outside is formed in a tapered shape toward the lower end in a side view, and the vibration feeder 3 is discharged from the lower part of the storage hopper 2.
  • the receiving placement unit 4 that receives the pellet group k to be received and the vibration generator 5 that applies vibration to the receiving placement unit 4 are provided.
  • the vibration generator 5 vibrates the receiving placement unit 4.
  • the pellet group k is fed out from one end thereof, and the pellet group k is fed out onto the shooter 1 so as to flow down in a single layer extending over the entire width of the shooter 1.
  • FIG. 1 the storage hopper 2 that is supplied and stored with the pellet group k from the outside is formed in a tapered shape toward the lower end in a side view, and the vibration feeder 3 is discharged from the lower part of the storage hopper 2.
  • the receiving placement unit 4 that receives the pellet group k to be received and the vibration generator 5 that applies vibration to the receiving placement unit 4 are provided.
  • the vibration generator 5
  • the shooter 1 is a flat shooter formed on a flat guide surface over the entire width in the width direction.
  • a two-layer state is included in the concept of a single layer state.
  • a detection point J for the pellet group k is set in a moving and dropping route IK in which the pellet group k is guided by the shooter 1, and the detection point J is guided by the shooter 1 and passed through the detection point J.
  • the normal pellet group k is dropped and recovered as it is in the lower normal collection unit 6, and the abnormal product is separately collected by changing the path by a blowing action by an air blowing device 7 to be described later. .
  • the storage hopper 2, the vibration feeder 3, the shooter 1, and the like transfer the pellet group k along the moving drop path IK in a state where the pellet group k is spread in the horizontal width direction and in the middle of the moving drop path IK.
  • the transfer means S which passes the detection location provided in the state extended along a horizontal width direction is comprised.
  • the vibration feeder 3 changes the conveying speed of the pellet group k due to the vibration of the vibration generator 5, thereby supplying the pellet group k fed to the shooter 1, that is, the transfer flow rate of the pellet group k by the shooter 1. It is configured to be able to change and adjust.
  • an optical measuring unit 8 is provided at a position corresponding to the detection point J.
  • the optical measuring unit 8 includes an illuminating means 9 for illuminating the detection location J, a light receiving means 10 for receiving light from the detection location J, and a pellet group than the detection location J.
  • k is provided with an air blowing device 7 or the like as a separating means for separating a separation target particle (abnormal material) from another normal pellet group k (normal material) at a separation point on the lower side in the transfer direction of k.
  • the unit is configured to be stored in the storage case 11.
  • the light receiving means 10 is positioned on the front side of the apparatus as one side with respect to the detection position J in the transfer direction view of the pellet group k or in the apparatus side view, and serves as one side light reception means for receiving light from the detection position J.
  • the front side light receiving unit 12 (hereinafter referred to as the front side light receiving unit 12) and the device rear side as the other side of the detection point J in the transfer direction view of the pellet group k or the device side view.
  • the rear side light receiving unit 13 (hereinafter, referred to as the rear side light receiving unit 13) is configured as the other side light receiving unit that receives the light from the detection point J.
  • the front side light receiving unit 12 receives light traveling outward from the detection point J toward the front side of the apparatus
  • the rear side light receiving unit 13 receives light traveling outward from the detection point J toward the rear side of the apparatus
  • the front-side light receiving unit 12 includes two front-side light receiving devices 14 ⁇ / b> A and 14 ⁇ / b> B that are arranged in a state of being aligned along the horizontal direction of the device.
  • the rear side light receiving unit 13 is also configured to include two rear side light receiving devices 15A and 15B arranged in a state of being aligned along the horizontal direction of the device.
  • each of the light receiving devices 14A, 14B, 15A, and 15B includes a plurality of unit light receiving portions t that receive light from the detection point J in a state of being juxtaposed along the device lateral width direction. It is configured to receive light in a resolution state in which a range smaller than the size of the pellet k is a unit light receiving target range. That is, each of the light receiving devices 14A, 14B, 15A, and 15B has a range p smaller than the size of the pellet k (for example, a range smaller than 1/10 of the size of the pellet) as the respective light receiving target range. As shown in FIG.
  • a plurality of unit light-receiving portions t which are light-receiving target ranges corresponding to the plurality of light-receiving target ranges, are juxtaposed in a line-like manner in correspondence with a wide detection point J. 16 and a condensing lens 17 that guides light received in a state having a viewing angle in the lateral direction of the apparatus to a plurality of unit light receiving portions t.
  • the two front-side light receiving devices 14A and 14B in the front-side light receiving unit 12 respectively target the right half and the left half of the entire width of the detection location J in the device lateral width direction.
  • An image of the pellet group k located at the detection point J is provided in a state of being formed on each unit light receiving unit t of the CCD sensor unit 16, and each light receiving information is sequentially extracted from each unit light receiving unit t. Yes.
  • the detection target areas U by the two front-side light receiving devices 14A and 14B are provided so as to overlap in the vicinity of the central portion, and all the detection locations J in the device lateral width direction are provided. Light measurement information is obtained in the region, so that no detection omission occurs. However, only the light reception data of either one of the left and right front light receiving devices 14A and 14B is used as the light reception data of the portion to be measured redundantly.
  • the rear side light receiving unit 13 is merely reverse in the light detection direction, and has the same configuration as that of the front side light receiving unit 12, and therefore description thereof is omitted. Further, such discrimination processing based on the detection information of the light receiving means 10 will be described later.
  • the optical axis CL2 is set not in a direction orthogonal to the transfer direction of the pellet group k, but in a state of being inclined toward the upper side of the pellet transfer direction from the direction orthogonal to the transfer direction, and the front side light receiving devices 14A and 14B
  • the rear side light receiving devices 15A and 15B are configured to be able to simultaneously detect light from the same detection location J.
  • the illumination means 9 will be described. As shown in FIGS. 1, 2, and 5, the illuminating means 9 is located on the front side of the apparatus as one side with respect to the detection position J in the transfer direction view of the pellet group k or in the side view of the apparatus.
  • a front side illumination unit 18 as one side illumination means for illuminating J, and a detection point located on the rear side of the apparatus as the other side with respect to the detection point J in the transfer direction view of the pellet group k or the device side view
  • the rear side illumination part 19 as an illumination means of the other side which illuminates J is comprised.
  • the front-side illumination unit 18 includes an illumination light source 20 that emits toward the detection location J, and a diffuse transmission member 21 that transmits light emitted from the illumination light source 20 toward the detection location J as diffused light. It is prepared for.
  • the diffuse transmission member 21 has a convex curved surface Q that curves from the detection point J toward the outside of the front side of the apparatus as one side outward. It has a substantially semi-cylindrical shape that extends in the width direction.
  • the diffuse transmission member 21 is formed by bending a plate-shaped member made of a general light diffusion member that transmits light incident from the outside of one side of the plate as diffused light so as to have a semi-cylindrical shape. It is comprised by doing.
  • the illumination light source 20 is configured to include a plurality of line illumination devices 23 as a plurality of light emitting units in a state of being aligned along the convex curved surface Q of the diffuse transmission member 21.
  • a plurality of long line illumination devices 23 are provided in the apparatus width direction in a state having the same or substantially the same width as the width of the detection location J along the apparatus width direction. It is provided with being arranged along the convex curved surface Q.
  • the plurality of line-like illuminating devices 23 in the front side illuminating unit 18 distributes light vertically from the detection point J to the optical axis CL1 of the light guided to the front side light receiving devices 14A and 14B.
  • Each line illumination device 23 is attached so as to emit light toward the detection portion J.
  • the diffuse transmission member 21 has a convex curved surface Q that curves in a convex shape from the detection point J toward the outside of the front side of the apparatus as one side outward, and has a substantially semi-cylindrical shape that extends in the lateral width direction.
  • a light passage hole 70 for guiding the light from the detection point J to the front side light receiving devices 14A and 14B is formed at the center in the width direction of the diffuse transmission member 21.
  • a pair of light beams emitted in a direction substantially perpendicular to the transfer direction of the pellet group k is arranged and distributed substantially evenly in the vertical direction with respect to the optical axis CL1 in a state of being close to the optical axis CL1.
  • the horizontal illuminating device 23a for horizontal light emission and the light illuminating device 23a are arranged substantially equally in the vertical direction with respect to the optical axis CL1 while being separated from the optical axis CL1, and directed in a direction substantially along the transfer direction of the pellet group k.
  • a pair of vertical light emitting line illumination devices 23b for emitting light, and a total of four line illumination devices 23a and 23b are provided.
  • the rear side illumination unit 19 has the same configuration as the front side illumination unit 18 although the arrangement state is reversed between the front and the back so that the light emitting direction is different between the front and the rear of the apparatus.
  • the illumination light source 24 is emitted toward the detection location J
  • the diffusion transmission member 25 is configured to transmit the light emitted from the illumination light source 24 toward the detection location J as diffused light.
  • the diffusing and transmitting member 25 has a convex curved surface Q that curves convexly from the detection point J toward the outer side of the rear side of the apparatus as the outer side of the other side, and extends substantially in the lateral width direction. It is configured in a cylindrical shape.
  • a light passage hole 71 for guiding light from the detection point J to the front light receiving devices 14A and 14B is formed at the center in the width direction of the diffuse transmission member 25.
  • the illumination light source 24 is configured to include a plurality of line illumination devices 27 as a plurality of light emitting units in a state of being aligned along the convex curved surface Q of the diffusing and transmitting member 25.
  • the linear illumination device 27 that is long in the horizontal width direction is arranged along the convex curved surface Q in a state having the same or substantially the same width as the width along the horizontal width direction of the detection location J.
  • a pair of light beams that are arranged substantially equally in the vertical direction with respect to the optical axis CL2 in a state of being close to the optical axis CL2 and emit light in a direction substantially orthogonal to the transfer direction of the pellet group k.
  • There is a pair of vertical light emitting line illumination devices 27b that emit light, and a total of four line illumination devices 27 are provided.
  • the white LED light emitting elements are elongated in the horizontal width direction in three rows on the substrate.
  • the light emitting device includes a light collecting member that collects light emitted from the plurality of white LED light emitting elements, a diffusion plate that diffuses light, and the like.
  • Illumination light quantity adjustment means 28 that can be changed and adjusted individually is provided.
  • the illumination light amount adjusting means 28 includes four front-side illumination light amount adjustment circuits 29 that individually act on the four line illumination devices 23 in the front-side illumination unit 18, and the rear-side illumination unit 19.
  • the four line-shaped illumination devices 27 in FIG. 4 are configured with four rear-side illumination light amount adjustment circuits 30 that act separately.
  • the pair of horizontal light emitting line illumination devices 23a and 27a that emit light in a direction substantially orthogonal to the transfer direction of the pellet group k, and the direction substantially along the transfer direction of the pellet group k.
  • the pellet k is formed of a transparent material, if the pellet k is a normal pellet k that does not have an abnormal part, the light intensity is particularly large or the light intensity is small. This is less likely to occur.
  • a total of four line lighting devices 23 in the front side lighting unit 18 are detachably screwed mounting plates on both lateral sides of the storage case 11. 31.
  • the attachment plates 31 on the both sides and the four line illumination devices 23 are integrated.
  • the state that is supported by can be removed to the outside. This facilitates maintenance work such as repair and replacement.
  • the front side of the front side light receiving unit 12 projects light toward the front side light receiving unit 12 from the side opposite to the front side light receiving unit 12 of the detection point J in the light receiving direction.
  • the projection member 32 is provided in a state of being positioned between the lower horizontal light emitting line illumination device 23 a and the lower vertical light emitting line illumination device 23 b in the front side illumination unit 18. Yes.
  • the rear side projection member 33 that projects light toward the rear side light receiving unit from the side opposite to the rear side light receiving unit 13 in the light receiving direction of the rear side light receiving unit 13 is provided in the rear side lighting unit 19. Are arranged between a line illumination device 27a for horizontal light emission located on the lower side and a line illumination device 27b for light emission on the lower side.
  • the front-side projection member 32 and the rear-side projection member 33 are not described in detail, but a large number of LED light-emitting elements are arranged side by side on a long substrate in the width direction, and the LED light-emitting elements are arranged.
  • the light is projected to the front side light receiving unit 12 and the rear side light receiving unit 13 through the detection point J.
  • the front-side projection member 32 and the rear-side projection member 33 are the same as the reflected light from the normal material in the pellet group k by the background light amount adjusting device 34 as the background light amount adjusting means.
  • the amount of light is adjusted so as to project light having substantially the same brightness.
  • projection members 32 and 33 that project light toward the light receiving means 10 from a position opposite to the light receiving means 10 of the detection position J in the light receiving direction of the light receiving means 10 are provided.
  • a background light amount adjustment device 34 that can be changed and adjusted is provided. This background light quantity adjusting device 34 changes and adjusts the light quantity projected to the light receiving means 10 by changing and adjusting the current value supplied to the LED light emitting elements constituting the front side projection member 32 and the rear side projection member 33. It is possible to do this.
  • a pellet passage space C ⁇ b> 1 penetrating in the vertical direction is formed in the front and rear central portion of the storage case 11 so that the pellet group k guided by the shooter 1 passes therethrough.
  • a front side storage space C2 for storing the front side illumination unit 18 and the front side projection member 32 is formed on the front side of the device in the space C1, and a rear side is provided on the rear side of the device in the pellet passage space C1.
  • a rear side storage space C3 for storing the illumination unit 19 and the rear side projection member 33 is formed.
  • a front-side partition portion 35 provided in the storage case 11 and a glass light transmission window 36 provided so as to be continuous therewith are provided between the pellet passage space C1 and the rear-side storage space C3.
  • a rear-side partition portion 37 and a glass light transmission window 38 provided so as to be continuous therewith are provided between the pellet passage space C1 and the rear-side storage space C3.
  • CL2 is set so as to be inclined to the upper side of the pellet transfer direction from the direction orthogonal to the transfer direction of the pellet group k, but in order to efficiently detect the light from the detection point J, Since the transmission windows 36 and 38 are provided so as to be orthogonal to the respective optical axes CL1 and CL2, the pellet passage space C1 in which the detection point J is located is widened downward toward the lower side. Will be formed.
  • An air blowing device 7 is provided for blowing air to separate the normal pellet group k from the moving direction.
  • This air spraying device 7 has a plurality of spray nozzles 7a juxtaposed in a state corresponding to each section formed by dividing the entire width of the detection location J into a plurality of sections with a predetermined width, and a section where abnormal objects are present.
  • the spray nozzle 7a is activated to blow away abnormal objects.
  • recovery part 6 which collects the normal pellet k which progresses as it is, without receiving the blowing of the air from the injection nozzle 7a, and the normal pellet k which receives the blowing of air
  • the normal material recovery unit 6 is formed in a long and narrow cylindrical shape in the horizontal width direction, and collects the pellets k that have been blown off by air blowing As described above, an abnormal object recovery unit 39 is formed.
  • FIG. 1 a bottom 41 having legs 40, a front vertical frame 42 erected from the bottom 41, a rear vertical 43, diagonal horizontal frames 44, 45 connecting them at the left and right sides, etc.
  • the machine frame is constructed, and the vibration generator 5 for the vibration feeder 3 is supported by a substantially box-shaped frame portion 47 that is installed and supported across the horizontal frames 44 on both the left and right sides.
  • a pressure adjusting device 48 for adjusting the pressure of air from an air supply source (not shown) for supplying air is provided.
  • a storage case 11 for storing the optical measurement unit 8 is supported by a box-shaped support base 49 that is installed and supported across the horizontal frames 45 on both the left and right sides.
  • the shooter 1 is supported by the frame 47 on the upper side and the storage case 11 on the lower side.
  • An operation panel 46 for displaying and inputting information is installed on a front cover 50 covering an upper oblique portion of the front vertical frame 42, and a circuit provided with a control circuit as will be described later in the rear cover 51.
  • a substrate is provided.
  • the front cover 50 and the rear cover 51 are configured to be openable and closable in the left-right direction so that the inside of the apparatus can be inspected.
  • the control device 52 includes two front light receiving devices 14A and 14B and two rear light receiving devices 15A and 15B. Each light reception signal and operation information from the operation panel 46 are input.
  • a display drive signal for the operation panel 46 from the control device 52, drive signals for the four front side illumination light amount adjustment circuits 29, and four rear side illumination light amount adjustment circuits 30.
  • a drive signal, a drive signal for a plurality of solenoid valves 53 for turning on and off the air supply to each injection nozzle 7a, a drive signal for the vibration generator 5, and a projection member 32 on the front side and a projection member 33 on the rear side Drive signal is output.
  • a determination unit 100 is configured to determine whether or not the appropriate light amount range ⁇ E1, ⁇ E2 is out of the range.
  • the discriminating means 100 samples the received light amount of each unit light receiving unit t of the front side light receiving devices 14A and 14B at a predetermined time interval, and the sampled light amount value corresponds to the reflected light on the front side. Whether or not the appropriate light amount range ⁇ E2 set for each unit light receiving unit t is deviated is determined for each unit light receiving unit t, and the amount of light received by each unit light receiving unit t of the rear side light receiving devices 15A and 15B is predetermined. Sampling is performed at time intervals, and it is determined for each unit light receiving unit t whether the sampled light amount value is outside the appropriate light amount range ⁇ E1 set for each unit light receiving unit t with respect to the reflected light on the rear surface side. In both the above determinations, the presence of an abnormal object is detected when the amount of light received by any one of the unit light receiving portions t is out of the appropriate light amount range ⁇ E1, ⁇ E2.
  • the amount of light received by the unit light receiving unit t that has received the reflected light from the abnormal portion deviates from the appropriate light amount range ⁇ E1, ⁇ E2, and the presence of an abnormal object is detected.
  • FIG. 8 is an enlarged view of a part of the waveform of the received light output voltage, and in order to make the explanation easier to understand, a state in which there are more abnormalities than actual is shown.
  • e0 is an output voltage level with respect to standard reflected light from a normal pellet.
  • the output voltage of the light receiving element 5a is smaller than the appropriate light amount range ⁇ E1, ⁇ E2, e1 and e2 are higher than normal pellets.
  • the presence of abnormal pellets with low reflectance (for example, burned portions), resin pellets of different colors, etc. are determined, and when e3 is larger than the appropriate light amount range ⁇ E1, ⁇ E2, e3 has a higher reflectance than normal pellet k.
  • the presence of foreign matter such as resin pellets of different colors (for example, white resin pellets with high brightness) is determined.
  • the control apparatus 52 conveys the pellet group k from the detection location J to the injection position of the injection nozzle 7a. As the time interval required for this elapses, air is blown from the respective injection nozzles 7a in the section corresponding to the position of the abnormal object to separate it from the normal pellet k path.
  • the appropriate light quantity ranges ⁇ E1, ⁇ E2 are set and stored. That is, for example, with respect to the pellet group k as an inspection object, a set number of abnormal objects that have been determined to be abnormal in advance by human judgment are prepared, and the abnormal object is caused to flow down the shooter 1 to receive all light. The amount of light is sequentially measured, and based on the measurement result of the amount of received light, the appropriate light amount range ⁇ E1, ⁇ E2 is determined by setting the light intensity setting threshold to be determined as abnormal, and the appropriate light amount ranges ⁇ E1, ⁇ E2 are not illustrated. When it is stored in the memory and detection is performed for a large number of pellet groups k as inspection objects, detection processing is executed using the stored appropriate light amount ranges ⁇ E1 and ⁇ E2.
  • the illumination light quantity adjustment process by the illumination light quantity adjusting means 28 acting on each of the plurality of line illumination devices 23 and 27 is performed. That is, as shown in FIG. 2, the pellet passage space C ⁇ b> 1 in which the detection point J is located is formed so as to expand downward so that the lower side of the front side illumination unit 18 is horizontal.
  • the line illumination device 23a for light emission and the line illumination device 23a for horizontal light emission on the upper side are different from each other in the distance from the detection point J. Even if the same amount of light is emitted, the detection point The amount of light that irradiates J is slightly different. The same applies to the line illumination devices 23b for vertical light emission on both the upper and lower sides.
  • the operator changes and adjusts the light amount of each linear illumination device 23 using the operation panel 46 so that the light amount of the light irradiating the detection location J by each linear illumination device 23 becomes the same.
  • the light amount of each line illumination device 27 is changed and adjusted.
  • a background light quantity adjustment process for adjusting the light quantities of the front projection member 32 and the rear projection member 33 is performed. That is, the operator uses the operation panel 46 to change and adjust the light amounts of the front-side projection member 32 and the rear-side projection member 33 so as to correspond to the normal amount. Since the background light amount becomes equal to the light amount of the normal object in this way, even when the pellet k does not exist at the detection location J, the presence of an abnormal object is not detected based on the amount of light received by the light receiving means 10, The air blowing device 7 does not operate unnecessarily and performs a useless operation.
  • the line-shaped illumination devices 23 and 27 are formed independently as the plurality of light emitting units 22 and 26 in a state where the illumination light source 20.24 is arranged along the convex curved surface Q.
  • the illumination light sources 20 and 24 instead of this configuration, for example, as shown in FIGS. 10 and 11, have a substantially arc shape along the convex curved surface Q. It may be configured by a single lighting device 60 formed integrally. In this configuration, since the illumination light sources 20 and 24 are integrally formed along the convex curved surface Q, light is directed toward the light receiving means 10 from the detection point J at the center.
  • the light passage holes 73 and 74 for allowing the light to pass therethrough are formed.
  • what is comprised by the one illuminating device 61 integrally formed in polygonal shape etc. may be sufficient.
  • the illumination light sources 20 and 24 are configured to include LED light emitting elements.
  • the illumination light source is not limited to the LED light emitting elements, but may be other fluorescent lamps or the like. Various types of lighting lamps can be used.
  • the projection members 32 and 33 which project light toward the light-receiving means 10 showed what comprised a LED light emitting element, as a projection member, it is restricted to a LED light emitting element. Instead, it may be configured by a reflector having a predetermined light reflectance.
  • the light receiving means 10 includes two front light receiving devices 14A and 14B (15A and 15B) arranged in a state of being aligned along the device width direction. It is good also as a structure which detects the full width direction of this with one light-receiving device.
  • the second embodiment of the granular material inspection apparatus performs a discrimination process as to whether it is normal or abnormal and a separation process thereof while transferring a large number of resin pellets as inspection objects.
  • the case will be described with reference to the drawings.
  • it demonstrates centering around difference with the said 1st Embodiment, and abbreviate
  • FIG. 13 is an overall side view of the second embodiment.
  • a shooter 1 having an inclined posture for flowing down and guiding the pellet group k in a single layer and in a wide state so as to pass the detection point J is provided, and vibration is generated from a storage hopper 2 provided on the upper side of the shooter 1. While the pellet group k transported and supplied by the feeder 3 is allowed to flow down the upper surface of the shooter 1, the normal product and the abnormal product can be selected and separated.
  • the front-side light receiving unit 12 is provided with front-side lens hood means 55 for the two front-side light receiving devices 14A and 14B. That is, the lens hood means 55 prevents each front side light receiving device 14A, 14B from receiving light in an oblique direction other than the light from the detection point J.
  • the lens hood means 55 is provided between the two front side light-receiving devices 14 ⁇ / b> A and 14 ⁇ / b> B and the diffuse transmission member 21 described later.
  • the lens hood means 55 includes a hood tube portion 56 through which a light receiving path R1 for receiving light from the detection point J by the two front light receiving devices 14A and 14B, and a light shielding plate portion positioned on the outer periphery of the hood tube portion 56. 57.
  • the light shielding plate 57 includes two front light-receiving devices 14A and 14B, a diffuse transmission member 21 to be described later, a plurality of linear illumination devices 23a, 23b and 23c to be described later, and a projection member 32 to be described later. Deployed between.
  • a white ceramic coat is applied to the inner and outer peripheral surfaces of the hood cylinder portion 56 and the side surface of the light shielding plate portion 57 on the side where the detection portion J is located.
  • the base portion of the hood tube portion 56 and the intermediate portion of the light shielding plate portion 57 are connected, and the light shielding plate portion 57 is fixed to the back portions of the three line illumination devices 23a and 23b. Accordingly, the lens hood means 55 is connected to the line-shaped illumination devices 23a and 23b and the four plate-shaped illumination devices 23a, 23b, and 23c via the mounting plate 31 that is attached to the side cover 11A of the storage case 11. And is supported by the storage case 11.
  • the side face of the light shielding plate 57 that faces the detection point J in the part located behind the three line-shaped illumination devices 23a and 23b is a concave surface that is convex on the side opposite to the side where the detection part J is located.
  • the part which is formed and is located behind the three line-shaped illumination devices 23a and 23b in the light shielding plate part 57 is configured as a reflection part 57a that generates reflected light toward the detection part J.
  • the light from the detection point J is received by the two front light receiving devices 14A and 14B through the inside of the hood tube portion 56.
  • Light that leaks or reflects from the line-shaped illumination devices 23a, 23b, 23c, the diffuse transmission member 21, and the projection member 32 toward the front light receiving devices 14A, 14B is received by the two front light receiving devices 14A, 14B.
  • the light is shielded by the entire hood tube portion 56 and the light shielding plate portion 57 so as not to occur.
  • the light reflected from the line-shaped illumination devices 23a, 23b, and 23c and the diffuse transmission member 21 to the front-side light-receiving devices 14A and 14B is reflected toward the detection point J by the reflection unit 57a, and the pellet group k. Lighting light for
  • the hood tube portion 56 is configured such that the shape in the direction along the light receiving path R1 is a horizontally long shape extending over the two front side light receiving devices 14A and 14B.
  • the hood tube portion 56 is formed in a tapered shape such that the inner diameter decreases as the distance from the two front side light-receiving devices 14A and 14B increases, that is, the closer the diffuse transmission member 21 is approached. Even if light enters, the front side light receiving devices 14A and 14B are hardly affected. That is, even if light entering the hood tube portion 56 from an oblique direction is reflected by the inner wall surface of the hood tube portion 56 toward the front light receiving devices 14A and 14B, the reflected light is tapered in the hood tube portion 56. Due to the inclination of the inner wall surface due to the shape, the front side light receiving devices 14A and 14B are directed outwardly from the optical axis CL1.
  • the hood cylinder portion 56 includes an upper and lower flat horizontal plate portion 56a and a left and right flat vertical plate portion 56b.
  • the upper and lower horizontal plate portions 56a and the left and right vertical plate portions 56b are inclined with respect to the optical axis CL1 so as to approach the optical axis CL1 toward the distal end side of the hood tube portion 56.
  • the inner wall surface of the hood tube portion 56 is an inclined inner wall surface that is inclined so as to approach the optical axis CL1 toward the tip end side of the hood tube portion 56 in both the upper and lower sides and the left and right sides.
  • the light entering the portion 56 from an oblique direction is reflected in a direction deviating outward from the optical axis CL1.
  • a light transmitting body 80 having a divided processing film 81 provided on one side surface is provided in the light receiving path R1 of the two front side light receiving devices 14A and 14B.
  • the light transmitting member 80 is assembled to the light transmitting hole 70 provided so that the light receiving path R1 of the front light receiving devices 14A and 14B passes through the diffuse transmitting member 21, and is supported by the diffuse transmitting member 21.
  • the light transmitting body 80 is made of organic glass such as plate glass or acrylic.
  • the divided processing film 81 is configured by plating or vapor-depositing tin or silver on the side surface of the organic glass.
  • the incident light incident on the divided processing film 81 in the direction toward the detection portion J is converted into reflected light and transmitted light.
  • a division process for dividing is performed.
  • the split processing film 81 is configured to perform split processing so that 60% of incident light becomes reflected light and 40% of incident light becomes transmitted light.
  • the ratio of dividing the incident light into the reflected light and the transmitted light is not limited to the ratio of 6 to 4, but an appropriate ratio corresponding to the intensity of light from the front side light receiving devices 14A and 14B toward the detection point J can be used. It is good to set.
  • the transmitted light reaches the detection point J by the divided processing film 81 and the reflected light does not reach the detection point J. It is divided into and. Thereby, the light reaching the detection point J from the front side light receiving devices 14A and 14B becomes weak, and the dark portion of the condenser lens 17 of the front side light receiving devices 14A and 14B is hardly reflected on the pellet.
  • the divided treatment film 81 provided in the light transmitting body 80 is provided on the side surface of the light transmitting body 80 on the side facing the detection location J.
  • An AR coating as an antireflection film 82 is provided on the side surface of the light transmitting body 80 facing the front light receiving devices 14A and 14B.
  • the division processing film 81 included in the light transmitting body 80 forms the side surface of the light transmitting body 80 in a mirror shape and easily generates reflected light toward the front light receiving devices 14A and 14B.
  • the antireflection film 82 suppresses the generation of reflected light on the side surfaces of the light transmitting body 80 facing the front light receiving devices 14A and 14B. That is, although the light-transmitting body 80 includes the divided processing film 81, the reflected light generated in the light-transmitting body 80 in the state toward the front-side light receiving devices 14A and 14B can be suppressed weakly.
  • the illumination light source 20 is configured to include a plurality of line illumination devices 23 as a plurality of light emitting units in a state of being aligned along the convex curved surface Q of the diffuse transmission member 21. Specifically, as shown in FIGS. 14 and 17, a plurality of line-like illumination devices 23 that are long in the device width direction are provided in a state having the same or substantially the same width as the width along the device width direction of the detection location J. It is provided with being arranged along the convex curved surface Q.
  • a pair of horizontal lights that are arranged approximately equally in the vertical direction with respect to the optical axis CL1 in a state of being close to the optical axis CL1 and emit light in a direction substantially orthogonal to the transfer direction of the pellet group k.
  • the light emitting line illumination devices 23a, 23a and the light illuminating devices 23a and 23a are arranged so as to be substantially evenly distributed in the vertical direction with respect to the optical axis CL1 in a state of being separated from the optical axis CL1, and toward a direction substantially along the transfer direction of the pellet group k.
  • the four linear illumination devices 23a, 23b, and 23c are arranged in the moving direction of the pellet group k in the part IKa that includes the detection part J in the moving and dropping path IK.
  • the rear side illumination unit 19 has the same configuration as the front side illumination unit 18 although the arrangement state is reversed between the front and the back so that the light emitting direction is different between the front and the rear of the apparatus.
  • the illumination light source 24 is emitted toward the detection location J
  • the diffusion transmission member 25 is configured to transmit the light emitted from the illumination light source 24 toward the detection location J as diffused light.
  • the diffusing and transmitting member 25 has a convex curved surface Q that curves convexly from the detection point J toward the outer side of the rear side of the apparatus as the outer side of the other side, and extends substantially in the lateral width direction. It is configured in a cylindrical shape.
  • a light passage hole 71 for guiding the light from the detection point J to the rear side light receiving devices 15A and 15B is formed at the center in the width direction of the diffuse transmission member 25.
  • the illumination light source 24 is configured to include a plurality of line illumination devices 27 as a plurality of light emitting units in a state of being aligned along the convex curved surface Q of the diffusing and transmitting member 25. That is, it is configured to include a plurality of line-shaped illumination devices 27 that are long in the horizontal width direction along the convex curved surface Q in a state having the same or substantially the same width as the width along the device horizontal width direction of the detection location J. ing.
  • a pair of light beams that are arranged substantially equally in the vertical direction with respect to the optical axis CL2 in a state of being close to the optical axis CL2 and emit light in a direction substantially orthogonal to the transfer direction of the pellet group k.
  • Horizontal light emitting line illuminators 27a, 27a and the optical axis CL2 in a state of being separated from the optical axis CL2 and distributed substantially evenly in the vertical direction, in a direction substantially along the transfer direction of the pellet group k.
  • the four line illumination devices 27a, 27b, and 27c are arranged in the moving direction of the pellet group k in the part IKa that includes the detection part J in the moving and dropping path IK.
  • the illumination range of the lower side line illumination devices 23c and 27c located on the lower side in the pellet group movement direction of the four line illumination devices 23 and 27 is the same as the illumination range of the four line illumination devices 23 and 27. It is set narrower than the illumination range of the middle line illumination devices 23a, 27a located between the upper line illumination devices 23b, 27b and the lower line illumination devices 23c, 27c.
  • the illumination range of the upper-side line illumination devices 23b and 27b and the illumination range of the lower-side line illumination devices 23c and 27c are set to be the same or substantially the same.
  • the surface shape of the intermediate portion of the pellet located at the detection point J becomes a horizontally convex arc or curved shape
  • the light hitting the intermediate portion of the pellet is the front side light receiving devices 14A and 14B and the rear side light receiving device. It is easy to reflect toward 15A and 15B.
  • the surface shape of the upper end portion of the pellet located at the detection location J is an upwardly convex arc, a curved shape, or a shape close thereto, and the surface shape of the lower end portion of the pellet located at the detection location J is downward.
  • the upper and lower ends of the pellet are reflected toward the front light receiving devices 14A and 14B and the rear light receiving devices 15A and 15B as compared to the middle portion.
  • Light tends to be weak.
  • the irradiation range of the upper side line illumination devices 23b and 27b in which the emitted light hits the upper end portion of the pellet and the irradiation range of the lower side line illumination devices 23c and 27c in which the emitted light hits the lower end portion of the pellet are emitted.
  • the upper side line illumination devices 23b and 27b and the lower side line illumination devices 23c and 27c are in the middle line shape. Strong light concentrated more than the illumination devices 23a and 27a is emitted toward the upper end and lower end of the pellet. Therefore, the reflected light from the upper and lower ends of the pellet toward the front light receiving devices 14A and 14B and the rear light receiving devices 15A and 15B, and the front light receiving devices 14A and 14B and the rear light receiving device from the intermediate portion of the pellet.
  • the upper-side line illumination device is set so that the reflected light from the upper end and the lower end of the pellet toward the front light-receiving devices 14A and 14B and the rear light-receiving devices 15A and 15B becomes reflected light with an appropriate intensity.
  • the middle line illumination devices 23a and 27a have the same narrow illumination range as the illumination ranges of 23b and 27b and the lower line illumination devices 23c and 27c, intense light hits the middle part of the pellet and halation occurs. It is easy to generate. However, since the irradiation range of the middle line illumination devices 23a and 27a is wider than that of the upper line illumination devices 23b and 27b and the lower line illumination devices 23c and 27c, the occurrence of halation can be avoided.
  • a reflecting member 85 is provided at a position located between both lateral sides of the part IKa including the detection part J in the moving drop path IK and the side cover 11 ⁇ / b> A in the storage case 11. It is.
  • the reflection members 85 on both lateral sides of the part IKa are positioned on the lateral sides of the diffuse transmission members 21 and 25 in a direction crossing the light receiving direction of the front light receiving devices 14A and 14B and the rear light receiving devices 15A and 15B. It is arranged at the place to do. As shown in FIGS.
  • the reflecting member 85 on both sides of the part IKa includes a pair of support arms 86 and 86 extending from the reflecting member 85 to the side opposite to the side where the detection location J is located.
  • the extended end portions of the pair of support arms 86, 86 are connected to the side cover 11A of the storage case 11 so as to be supported by the storage case 11.
  • the reflecting members 85 on both lateral sides of the part IKa reflect the light that leaks laterally outward from the part 1Ka in the moving and dropping path IK toward the detection part J to illuminate the pellet group k.
  • a reflecting surface 85a formed by applying a white ceramic coat is provided on the side face of the reflecting member 85 on both sides of the part IKa toward the detection point J.
  • the pair of horizontal light emitting line illumination devices 23a and 27a that emit light in a direction substantially orthogonal to the transfer direction of the pellet group k, and the direction substantially along the transfer direction of the pellet group k.
  • the lens hood means 55, 65 has a reflecting function, and further includes a reflecting member 85, so that the light illuminating the pellet located at the detection point J It becomes the state diffused substantially uniformly over the wide range of the outer peripheral part.
  • the concentrated strong light is applied to the pellet group k.
  • the upper end portion and the lower end portion do not appear dark on the front side light receiving devices 14A and 14B and the rear side light receiving devices 15A and 15B.
  • the pellet is formed of a transparent material, if it is a normal pellet that does not have an abnormal part, the light part with particularly high light intensity or the shadow part with low light intensity Etc. are less likely to occur.
  • an air blowing device 7 is provided below the detection location J as a separating means.
  • the air spraying device 7 is located at a position deviated to the rear side of the device as a lateral side of the dropping path L where the pellet group k falls from the detection location J.
  • the air blowing device 7 blows air against abnormal objects (for example, pellets burned and colored in the resin processing process, pellets of different colors, etc.) identified based on the received light information at the detection location J.
  • the product is separated from the normal moving direction of the pellet group k.
  • This air spraying device 7 has a plurality of spray nozzles 7a juxtaposed in a state corresponding to each section formed by dividing the entire width of the detection location J into a plurality of sections with a predetermined width, and a section where abnormal objects are present.
  • the spray nozzle 7a is activated to blow away abnormal objects.
  • a lower first reflecting member 90 is provided above the air blowing device 7, and the air blowing device 7 prevents light that tries to escape downward from the detection location J from striking the air blowing device 7. Are reflected toward the detection point J by the lower first reflecting member 90 and used for illumination of the pellet group k.
  • the lower first reflecting member 90 includes a flat main reflector 91 that is long in the lateral direction of the apparatus and a flat that rises obliquely from both ends of the main reflector 91 in the lateral direction of the apparatus. And a sub-reflecting plate portion 92.
  • the lower first reflecting member 90 includes a pair of mounting legs 93, 93 extending downward from the back surface side of the main reflector 91, and is connected to the air blowing device 7 by the pair of mounting legs 93, 93. It is configured to be supported.
  • the overall length of the lower first reflecting member 90 in the apparatus lateral direction is set to be the same or substantially the same as the apparatus lateral direction width of the detection location J.
  • Reflecting surfaces 91a and 92a formed by applying a white ceramic coat are provided on the upward surfaces of the main reflecting plate portion 91 and the sub-reflecting plate portion 92 toward the detection location J.
  • the reflecting surface 91a of the main reflecting plate portion 91 is an inclined surface that is located at a higher arrangement height as it moves to the lateral outer side from the falling path L where the pellet group k falls from the detection location J, and the lower first reflecting member 90 Is a guide function that causes the main reflector plate 91 and the sub-reflector plate portion 92 to naturally fall on the fall path L even if the beret from the detection point J falls on the main reflector plate 91 and the sub-reflector plate portion 92. It has.
  • an abnormal material recovery unit 39 (hereinafter referred to as an abnormal material recovery unit 39) for recovering abnormal materials separated from the normal pellet flow in the lateral direction by air blowing.
  • the object recovery unit 6 is formed in a cylindrical shape that is elongated in the width direction, and the abnormal object recovery unit 39 is formed so as to recover the pellets that have been blown off by the blowing of air.
  • a guide 95 that is long in the lateral direction of the apparatus is provided below the detection point J.
  • the guide body 95 is located at a position away from the side opposite to the side where the air blowing device 7 is located with respect to the drop path L.
  • the guide body 95 includes an inclined guide surface 95a in an inclined state that is positioned so as to be lowered from the fall path L to the front side of the apparatus as a lateral side thereof, and tilts abnormal objects that have been blown by the air blowing device 7.
  • the guide surface 95a guides the abnormal object collection unit 39 to drop.
  • a flat second lower reflecting member 97 that is long in the lateral direction of the apparatus is provided above the guide body 95, so that the light that tries to escape downward from the detection point J does not hit the guide body 95 and is not reflected. It is configured to be reflected toward the detection point J by the lower second reflecting member 97 at a point for illumination of the pellet group k.
  • the length of the lower second reflecting member 97 in the apparatus lateral direction is set to be the same as or substantially the same as the width of the detection position J in the apparatus lateral direction.
  • a reflective surface 97a formed by applying a white ceramic coat is provided on the upward surface of the lower second reflective member 97 toward the detection point J.
  • the lower second reflecting member 97 includes an attachment leg 98 constituted by bent ends at both ends in the lateral direction of the apparatus, and the attachment leg 98 is connected to the upper surface side of the guide body 95 and supported by the guide body 95. It is constituted as follows.
  • the illumination light sources 20 and 24 positioned along the convex curved surfaces Q of the diffusing and transmitting members 21 and 25 are provided with the line illumination devices 23 and 27 formed independently of each other.
  • the illumination light sources 20 and 24 are substantially circular along the convex curved surface Q of the diffuse transmission members 21 and 25.
  • You may comprise by the one illuminating device 60 integrally formed in the arc shape.
  • the illumination light sources 20 and 24 are integrally formed along the convex curved surface Q, light is directed toward the light receiving means 10 from the detection point J at the center.
  • the light passage holes 73 and 74 for allowing the light to pass therethrough are formed.
  • what is comprised by the one illuminating device 61 integrally formed in polygonal shape etc. may be sufficient.
  • the four light emitting units 23 and 27 (line illumination devices 23 and 27) are provided, and the upper side light emitting units 23b and 27b and the lower side are narrower than the middle light emitting units 23a and 27a.
  • the lower side light emitting parts 23c and 27c one on the lowermost side and one on the lower side are adopted as a total of two light emitting parts, one on the uppermost side and one on the next upper side. A total of two light emitting units, such as a single unit, may be employed. Further, the number of upper side light emitting units and lower side light emitting units may be different.
  • a light transmission body 80 may be employed in which a divided processing film 81 is provided on the side surface facing the 14B, 15A, and 15B, and an AR coating as an antireflection film 82 is provided on the side surface facing the detection location J.
  • the following operational effects are provided.
  • the transmitted light reaches the detection point J by the divided processing film 81, and the detection point
  • the light that reaches the detection point J from the light receiving devices 14A, 14B, 15A, and 15B on the front side and the rear side is weakened by being divided into reflected light that does not reach J, so that the light reception on the front side and the rear side is reduced.
  • the dark spots of the lenses of the devices 14A, 14B, 15A, and 15B are difficult to be reflected on the pellet.
  • the division processing film 81 transmits light that travels from the detection point J toward the front and rear light receiving devices 14A, 14B, 15A, and 15B to the front and rear light receiving devices 14A, 14B, 15A, and 15B.
  • the light is divided into reflected light that does not reach the front and rear light receiving devices 14A, 14B, 15A, and 15B.
  • the antireflection film 82 suppresses reflection of light on the side surface of the light transmitting body 80 toward the detection point J. Therefore, it is possible to suppress the light from the detection point J toward the light receiving devices 14A, 14B, 15A, and 15B on the front side and the rear side from being weakened by the divided processing film 81 by the antireflection film 82.
  • the light receiving devices 14A, 14B, 15A, and 15B on the side can be made difficult to be reflected on the pellet, but the light that reaches the front and rear light receiving devices 14A, 14B, 15A, and 15B from the detection location J is strongly strengthened. it can.
  • the illumination light sources 20 and 24 are configured to include LED light-emitting elements.
  • the illumination light source is not limited to the LED light-emitting elements, and other fluorescent lamps or the like. These types of lighting lamps can be used.
  • the projection members 32 and 33 that project the light toward the light receiving means 10 are configured to include the LED light emitting elements.
  • the present invention is not limited to this, and the reflector may have a predetermined light reflectance.
  • the light receiving means 10 includes the two light receiving devices 14A, 14B, 15A, and 15B arranged in a line in the device width direction. It is good also as a structure detected by one light receiving device covering the whole width.
  • the separation means 7 is configured to skip and separate abnormal objects.
  • a normal object may be configured to be separated by separation means.
  • the present invention can be used for a granular material inspection apparatus that uses a resin beret as an inspection object, and a granular material inspection apparatus that uses various granular materials such as candy as an inspection object.
  • Illuminating means 10 Light receiving means DESCRIPTION OF SYMBOLS 11 Storage case 12, 13 Light-receiving part 18 One side illumination means 19 Other side illumination means 20, 24 Illumination light source 21, 25 Diffuse transmission member 22, 26 Light emission part 23, 27 Line-shaped illumination apparatus 28 Illumination light quantity adjustment means 32, 33 Projection member 34 Background light amount adjustment means 55, 65 Hood means 56, 66 Hood cylinder portion 57, 67 Light shielding plate portion 57a, 67a Reflecting portion 80 Light transmitting body 81 Split processing film 82 Antireflection film IK Moving fall path J Detection location k Granular body group (pet group) S transfer means Q convex curved surface R1, R2 light receiving path

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Abstract

Provided is a granule inspection device capable of determining, in a satisfactory manner, whether the subject of inspection is normal or abnormal even if a transparent granule group is the subject of inspection. This invention is provided with: a transportation means (S) for transporting the granule group so as to pass the inspection position; a light-receiving means (10) for receiving light from the inspection position; and a determining means for determining whether or not the subject of inspection is normal or abnormal according to whether or not the amount of light received by the light-receiving means (10) is within an appropriate range for the amount of light corresponding to the subject of inspection being normal. An illumination means (9) for illuminating the inspection position (J) is provided with diffusion transmission members (21, 25) for allowing transmission, as diffused light, of light emitted from illumination light sources (20, 24) toward the inspection position (J), the diffusion transmission members being provided in a state of being formed on a convex curve surface (Q) that curves in a convex manner outward away from the inspection position. The illumination light sources (20, 24) are provided so as to be positioned along the convex curve surface (Q) at a location further outward from the diffusion transmission members (21, 25).

Description

粒状体検査装置Granule inspection device
 本発明は、検査対象物としての粒状体群を検出箇所を通過させるように移送する移送手段と、前記検出箇所を照明する照明手段と、前記検出箇所からの光を受光する受光手段と、前記受光手段の受光量が正常物に対応する適正光量範囲を外れているか否かにより正常物であるか異常物であるかを判別する判別手段とが備えられ、前記照明手段が、照明用光源と、その照明用光源から前記検出箇所に向けて出射された光を拡散光として透過させる拡散透過部材とを備えて構成されている粒状体検査装置に関する。 The present invention provides a transfer means for transferring a granular material group as an inspection object so as to pass through a detection location, an illumination means for illuminating the detection location, a light receiving means for receiving light from the detection location, Determining means for determining whether the received light amount of the light receiving means is out of an appropriate light amount range corresponding to a normal object, whether it is a normal object or an abnormal object, and the illuminating means includes an illumination light source and The present invention also relates to a granular material inspection apparatus including a diffusion transmission member that transmits light emitted from the illumination light source toward the detection portion as diffused light.
 従来の粒状体検査装置では、前記検出箇所からの光が前記受光手段の受光部に導かれる受光経路に近付けた状態で且つその受光経路の上下両側部に振り分けた状態で前記照明用光源としての蛍光灯が備えられ、その蛍光灯と検出箇所との間に、前記拡散透過部材として、蛍光灯から検出箇所に向けて投射される光を拡散光として透過させて検出箇所に導く平板状の拡散板が備えられる構成となっていた(例えば、特許文献1参照。)。 In the conventional granular material inspection apparatus, the light from the detection point is in the state of being close to the light receiving path guided to the light receiving unit of the light receiving unit and distributed to the upper and lower side parts of the light receiving path as the illumination light source. A fluorescent lamp is provided, and between the fluorescent lamp and the detection location, as the diffuse transmission member, a plate-like diffusion that transmits light projected from the fluorescent lamp toward the detection location as diffused light and guides it to the detection location It was the structure with which a board was equipped (for example, refer patent document 1).
特開2001-264256号公報JP 2001-264256 A
 蛍光灯等の照明用光源から出射された照明光を直接に検出箇所に照射する場合であれば、検査対象物として、例えば表面に光沢部分や小さい曲率の曲面部分等が存在する樹脂ペレット等を対象とするものでは、表面の光沢部分や小さい曲率の曲面部分等において、表面の他の部分における反射光よりも強い反射光が生じるおそれがある。そこで、上記従来構成では、蛍光灯等の照明用光源から出射された照明光を直接に検出箇所に照射するのではなく、拡散光によって検出箇所を照明することにより、上記したような表面に光沢部分や小さい曲率の曲面部分が存在するような粒状体群であっても、強い反射光が生じるおそれがなく、検査対象物からの本来の受光量の情報を得ることで、判別手段による正常物であるか異常物であるかの判別を適正に行うことができるようにしたものである。 In the case of directly irradiating a detection location with illumination light emitted from an illumination light source such as a fluorescent lamp, as an inspection object, for example, a resin pellet having a glossy portion or a curved surface portion with a small curvature on the surface, etc. In the target, there is a possibility that reflected light stronger than the reflected light in the other part of the surface is generated in the glossy part of the surface or the curved surface part with a small curvature. Therefore, in the above-described conventional configuration, the surface as described above is glossed by illuminating the detection portion with diffused light instead of directly irradiating the detection portion with illumination light emitted from an illumination light source such as a fluorescent lamp. Even if it is a granular group with a curved surface part with a small curvature, there is no risk of strong reflected light, and by obtaining information on the original amount of light received from the object to be inspected, a normal object by the discrimination means Or an abnormal object can be properly determined.
 上記従来構成は、拡散光を検査対象物に照射するものであることから、粒状体群から部分的に強い反射光が生じるおそれは少なくなるが、透明な樹脂ペレット等の透明な検出対象物である場合においては、判別手段による判別を適正に行うことができないおそれがあり、未だ改善の余地があった。 Since the conventional configuration irradiates the inspection object with diffused light, there is less possibility that strong reflected light is partially generated from the granular material group. However, with a transparent detection object such as a transparent resin pellet, In some cases, there is a possibility that discrimination by the discrimination means cannot be performed properly, and there is still room for improvement.
 すなわち、上記従来構成では、照明用光源が検出箇所から受光部に導かれる受光経路に近付く状態で備えられるものであり、検出箇所に位置する検査対象物に対しては、検出対象物における受光部による受光対象側の側面に対して、受光経路に略沿う方向に光が照射されるものとなる。 That is, in the above-described conventional configuration, the illumination light source is provided in a state approaching the light receiving path guided from the detection location to the light receiving portion, and for the inspection target located at the detection location, the light receiving portion in the detection target. The light is irradiated in a direction substantially along the light receiving path with respect to the side surface on the light receiving target side.
 そして、照射された光が検査対象物の表面で反射するだけではなく、例えば、検査対象物としての透明な樹脂ペレットの内部を通過しながら屈折して異なった方向に向きを変化させた状態で出射されて受光手段にて受光されることがある。その結果、実際には全ての領域で同じ透明度を有する正常な検査対象物(樹脂ペレット)であっても、光の屈折の仕方によっては、受光部にて受光される受光情報として、光の強さが大きい特に明るい部分や光の強さが小さい影の部分が存在する情報が得られることがあり、正常な検査対象物であるにもかかわらず、光の強さが大きい部分や光の強さが小さい影の部分の光量が適正光量範囲から外れて異常物であると誤判別されることがあり、判別手段による検査対象物の判別を適正に行うことができないおそれがあった。 And the irradiated light is not only reflected on the surface of the inspection object, but, for example, in a state where it is refracted while passing through the inside of the transparent resin pellet as the inspection object and changed in a different direction. It may be emitted and received by the light receiving means. As a result, even in the case of a normal inspection object (resin pellet) having the same transparency in all regions in practice, depending on how light is refracted, the intensity of light is received as light reception information received by the light receiving unit. Information with a particularly bright part or a shadow part with a low light intensity may be obtained, and even though it is a normal inspection object, a part with a high light intensity or a light intensity may be obtained. In some cases, the light amount of the shadow portion with a small thickness is out of the appropriate light amount range and is erroneously determined as an abnormal object, and there is a possibility that the inspection object cannot be properly determined by the determining means.
 本発明の目的は、透明な粒状体群を検出対象物とするような場合であっても、正常物であるか異常物であるかの判別を良好に行うことが可能な粒状体検査装置を提供する点にある。 An object of the present invention is to provide a granular material inspection apparatus capable of satisfactorily determining whether it is a normal object or an abnormal object even when a transparent granular material group is used as a detection target. The point is to provide.
 本発明の第1特徴構成は、検査対象物としての粒状体群を検出箇所を通過させるように移送する移送手段と、前記検出箇所を照明する照明手段と、前記検出箇所からの光を受光する受光手段と、前記受光手段の受光量が正常物に対応する適正光量範囲を外れているか否かにより正常物であるか異常物であるかを判別する判別手段とを備え、前記照明手段が、照明用光源と、その照明用光源から前記検出箇所に向けて出射された光を拡散光として透過させる拡散透過部材とを備えて構成され、前記照明手段が、前記拡散透過部材を前記検出箇所から離れる外方側に向けて凸状に湾曲する凸状曲面に形成する状態で備えるとともに、前記照明用光源を前記拡散透過部材よりも前記外方側の箇所に前記凸状曲面に沿って位置する状態で備えて構成されている点にある。 The first characteristic configuration of the present invention is configured to receive a light from the detection location, a transfer means for transferring the granular material group as the inspection object so as to pass through the detection location, an illumination means for illuminating the detection location, and A light receiving unit; and a determination unit that determines whether the received light amount of the light receiving unit is normal or abnormal depending on whether the amount of light received from the light receiving unit is out of an appropriate light amount range corresponding to a normal object. An illumination light source; and a diffusion transmission member that transmits light emitted from the illumination light source toward the detection location as diffused light, and the illumination means removes the diffusion transmission member from the detection location. It is provided in a state where it is formed in a convex curved surface that curves convexly toward the outer side away from the light source, and the illumination light source is positioned along the convex curved surface at a location on the outer side than the diffuse transmission member. Configured for state It lies in the fact that is.
 本構成によれば、照明手段における拡散透過部材が検出箇所から離れる外方側に向けて凸状に湾曲する凸状曲面に形成する状態で備えられ、照明用光源が拡散透過部材よりも外方側の箇所に拡散透過部材における凸状曲面に沿って位置する状態で備えられることから、照明用光源は、凸状に湾曲する凸状曲面に沿って互いに位置が異なる箇所から検出箇所に向けて光を出射し、その照明用光源が出射した光が拡散透過部材により拡散光として透過させて検出箇所に照射されることになる。 According to this configuration, the diffusing and transmitting member in the illuminating means is provided in a state of forming a convex curved surface that curves in a convex shape toward the outer side away from the detection location, and the illumination light source is outward from the diffusing and transmitting member. Since the light source for illumination is provided at the side location along the convex curved surface of the diffusive transmitting member, the illumination light source is directed from the location different from the location along the convex curved surface curved to the detection location to the detection location. Light is emitted, and the light emitted from the illumination light source is transmitted as diffused light by the diffusing and transmitting member and irradiated to the detection portion.
 言い換えると、照明用光源は、検出箇所に向かう光照射経路が検出箇所を中心にして略放射状に位置するように、互いに異なる方向から検出箇所に対して光を照射することになり、例えば、受光手段に導かれる光通過経路に略沿う方向の光を照射するとともに、その光通過経路に略沿う方向と略直交する方向の光を照射するなど、大きく向きが異なる種々の方向の光を透過拡散させた状態で検出箇所に照射させることが可能となる。 In other words, the illumination light source irradiates the detection location with light from different directions so that the light irradiation path toward the detection location is positioned substantially radially around the detection location. Transmits and diffuses light in various directions, such as irradiating light in a direction substantially along the light passage path guided to the means, and irradiating light in a direction substantially perpendicular to the light passage path. In this state, it is possible to irradiate the detection location.
 つまり、検出箇所に位置する検査対象物に対して、受光手段に導かれる光通過経路に略沿う方向の光だけでなく、その光通過経路に略沿う方向に対して略直交する方向の光等、凸状曲面に沿って互いに位置が異なる箇所から光を照射させることが可能となるので、検出箇所に位置する検査対象物に対して、広い範囲にわたり均等に拡散された光を照射することができる。 That is, not only light in a direction substantially along the light passage path guided to the light receiving means but also light in a direction substantially perpendicular to the direction substantially along the light passage path with respect to the inspection object located at the detection location, etc. Since it becomes possible to irradiate light from locations that are different from each other along the convex curved surface, it is possible to irradiate light that is uniformly diffused over a wide range to the inspection object located at the detection location. it can.
 このように広い範囲にわたり略均等に拡散された光を照射することにより、例えば、透明のペレット等の透明な検査対象物を対象とするものであっても、検出箇所に位置する検査対象部に対して照射手段にて照明される光が、検査対象物の外周部の広い範囲にわたって略均等に拡散された状態となるので、全ての領域で同じ透明度を有する正常な検査対象物(樹脂ペレット)であれば、受光手段にて受光される受光情報として、光の強さが大きい特に明るい部分や光の強さが小さい影の部分等が生じるおそれがなく誤判別のおそれが少ないものになる。 By irradiating light that is diffused substantially uniformly over a wide range in this way, for example, even for a transparent inspection object such as a transparent pellet, On the other hand, the light illuminated by the irradiating means is in a state of being diffused substantially uniformly over a wide range of the outer peripheral portion of the inspection object, so that a normal inspection object (resin pellet) having the same transparency in all regions If so, the light receiving information received by the light receiving means does not cause a particularly bright part having a large light intensity or a shadow part having a small light intensity, and the risk of erroneous determination is small.
 従って、透明な粒状体群を検出対象物とするような場合であっても、正常物であるか異常物であるかの判別を良好に行うことが可能な粒状体検査装置を提供できるに至った。 Therefore, even when a transparent granular group is used as a detection target, it is possible to provide a granular inspection apparatus that can perform a good discrimination as to whether it is normal or abnormal. It was.
 上記構成において、前記照明用光源が、前記凸状曲面に沿って並ぶ状態で複数の発光部を備えて構成され、前記複数の発光部の光量を夫々各別に変更調整自在な照明光量調整手段が備えられていると好適である。 In the above configuration, the illumination light source is configured to include a plurality of light emitting units in a state of being arranged along the convex curved surface, and an illumination light amount adjusting unit capable of individually changing and adjusting the light amounts of the plurality of light emitting units. It is suitable if it is provided.
 本構成によれば、照明用光源は凸状曲面に沿って並ぶ状態で複数の発光部を備えており、それら複数の発光部の光量を照明光量調整手段によって夫々各別に変更調整することが可能である。 According to this configuration, the illumination light source includes a plurality of light emitting units arranged in a line along the convex curved surface, and the light amount of the plurality of light emitting units can be changed and adjusted individually by the illumination light amount adjusting unit. It is.
 例えば、種々の装置の設置上の制約等から、検出箇所からの離間距離が互いに異なる状態で複数の受光部が配備されるようなことがあっても、複数の発光部の光量を各別に変更調整することにより、検出箇所に位置する検査対象物に対して、広い範囲にわたり略均等に拡散された状態で且つ同じ光量の光を照射することが可能となる。 For example, even if multiple light receiving units are deployed with different distances from the detection location due to restrictions on the installation of various devices, the light amounts of the multiple light emitting units are changed individually. By adjusting, it becomes possible to irradiate the inspection target located at the detection location with the same amount of light in a state of being diffused substantially uniformly over a wide range.
 従って、複数の受光部にて検査対象物に照射される光の光量を同じ光量に調整することができるので、複数の受光部の光量の違いに起因して判別手段が誤判別する不利を回避できるものになり、正常物であるか異常物であるかの判別を一層良好に行うことが可能となった。 Therefore, the amount of light applied to the inspection object can be adjusted to the same amount by a plurality of light receiving units, thereby avoiding the disadvantage that the determination unit misidentifies due to the difference in the light amounts of the plurality of light receiving units. As a result, it is possible to better determine whether the product is normal or abnormal.
 上記構成において、前記移送手段が、前記粒状体群を一層状態で且つ横幅方向に広がった状態で移動落下経路に沿って移送するとともに、前記移動落下経路の途中に横幅方向に沿って延びる状態で設けられた前記検出箇所を通過させるように構成され、前記照明手段が、前記移動落下経路の一方側に備えられる一方側照明手段と、前記移動落下経路の他方側に備えられる他方側照明手段とを備えて構成され、前記一方側照明手段における前記拡散透過部材が、前記検出箇所から一方側外方に向けて凸状に湾曲する前記凸状曲面を有し且つ前記横幅方向に向かって延びる略半円筒状に構成され、前記他方側照明手段における前記拡散透過部材が、前記検出箇所から他方側外方に向けて凸状に湾曲する前記凸状曲面を有し且つ前記横幅方向に向かって延びる略半円筒状に構成されていると好適である。 In the above configuration, the transfer means transfers the granular material group in a single layer state and spreads in the horizontal width direction along the moving drop path, and extends along the horizontal width direction in the middle of the moving drop path. The detection unit is configured to pass through, and the illumination unit includes one side illumination unit provided on one side of the moving fall path, and the other side illumination unit provided on the other side of the movement fall path. The diffuse transmission member in the one-side illuminating means has the convex curved surface that curves convexly outward from the detection location toward the one side and extends substantially in the lateral width direction. The diffuse transmission member in the other side illumination means has a convex curved surface that curves in a convex shape from the detection location toward the other side outward and is oriented in the lateral width direction. When configured for a substantially semi-cylindrical shape extending What is preferred.
 上記構成によれば、移送手段は、検査対象物としての粒状体群を一層状態で且つ横幅方向に広がった状態で途中に横幅方向に沿って延びる状態で設けられた検出箇所を通過させる状態で移動落下経路に沿って移送させる。このように検出箇所が横幅方向に沿って延びる状態で設けられ、複数の粒状体群を横並び状態で同時に移送させながら検査を実行するので、多量の検査対象物を能率よく処理できるものとなる。 According to the above configuration, the transfer means is in a state in which the granular material group as the inspection object is in a single layer state and extends in the horizontal width direction, and passes through a detection location provided in a state extending along the horizontal width direction. Move along the moving drop path. In this way, the detection location is provided in a state extending along the lateral width direction, and the inspection is performed while simultaneously transferring the plurality of granular material groups in a side-by-side state, so that a large amount of inspection objects can be processed efficiently.
 又、移動落下経路の一方側に備えられる一方側照明手段と、移動落下経路の他方側に備えられる他方側照明手段とにより、両側から検出箇所が照明されるので、検出箇所を移送される粒状体群における一方側の側面と他方側の側面とを共に照明することができ、粒状体群の外周部の略全域を均等に拡散された光で良好に照明することができる。 In addition, the detection location is illuminated from both sides by the one side illumination means provided on one side of the moving fall path and the other side illumination means provided on the other side of the movement fall path. The one side surface and the other side surface of the body group can be illuminated together, and the substantially entire area of the outer peripheral portion of the granular body group can be well illuminated with the uniformly diffused light.
 そして、一方側照明手段における拡散透過部材が検出箇所から一方側外方に向けて凸状に湾曲する凸状曲面を有し且つ横幅方向に向かって延びる略半円筒状に構成され、他方側照明手段における拡散透過部材が検出箇所から他方側外方に向けて凸状に湾曲する凸状曲面を有し且つ横幅方向に向かって延びる略半円筒状に構成されているから、横幅方向に沿って延びる長尺状の検出箇所において、その長手方向のいずれの位置においても、同じような外方に向けて凸状に湾曲する凸状曲面を形成することができ、同じように拡散させた光を良好に照射させることができる。 The diffuse transmission member in the one side illumination means has a convex curved surface that curves convexly from the detection location toward the one side outward and is formed in a substantially semi-cylindrical shape extending in the lateral width direction, and the other side illumination. The diffuse transmission member in the means has a convex curved surface that curves convexly from the detection location toward the outside of the other side, and is formed in a substantially semi-cylindrical shape extending in the horizontal width direction. In any elongated detection location that extends, a convex curved surface that curves in a convex manner toward the outside can be formed at any position in the longitudinal direction, and light diffused in the same way can be formed. It can be irradiated well.
 従って、多量の検査対象物を能率よく処理することが可能なものでありながら、透明な粒状体群を検出対象物とするような場合であっても、正常物であるか異常物であるかの判別を良好に行うことが可能となった。 Therefore, even if a large number of inspection objects can be efficiently processed, even if a transparent granular group is used as a detection object, is it normal or abnormal? This makes it possible to make a good discrimination.
 上記構成において、前記照明用光源における前記凸状曲面に沿って並ぶ状態で備えられる複数の発光部が、前記検出箇所の前記横幅方向に沿う幅と同じ又は略同じ幅を備える状態で前記横幅方向に長尺のライン状照明装置にて構成されていると好適である。 In the above-described configuration, the plurality of light emitting units provided in a state of being arranged along the convex curved surface in the illumination light source has the same or substantially the same width as the width along the horizontal width direction of the detection portion. It is preferable that the apparatus is composed of a long line illumination device.
 本構成によれば、照明用光源における凸状曲面に沿って並ぶ状態で横幅方向に長尺のライン状照明装置からなる複数の発光部が備えられ、しかも、そのライン状照明装置は、検出箇所の横幅方向に沿う幅と同じ又は略同じ幅を備える状態で備えられるので、検出箇所における横幅方向でのどの位置にあっても、その検出箇所に位置する検査対象物に対して広い範囲にわたって均等に拡散された光を照射することができる。 According to this configuration, a plurality of light-emitting units each including a linear illumination device that is long in the lateral width direction are arranged in a state of being aligned along the convex curved surface of the illumination light source. Is provided in a state having a width that is the same as or substantially the same as the width along the horizontal width direction. Can be irradiated with diffused light.
 上記構成において、前記受光手段の受光方向における前記検出箇所の前記受光手段とは反対側箇所から前記受光手段に向けて光を投射する投射部材と、この投射部材の光量を変更調整自在な背景光量調整手段とが備えられていると好適である。 In the above-described configuration, a projection member that projects light toward the light receiving unit from a position opposite to the light receiving unit of the detection position in the light receiving direction of the light receiving unit, and a background light amount capable of changing and adjusting the light amount of the projection member It is preferable that an adjusting means is provided.
 上記構成によれば、受光手段の受光方向における検出箇所の受光手段とは反対側箇所、すなわち、受光手段から検出箇所を見た場合に検出箇所の背景となる箇所に、受光手段に向けて光を投射する投射部材が備えられ、背景光量調整手段によりその投射部材の光量を変更調整することができる。 According to the above configuration, the light is directed toward the light receiving means at a position opposite to the light receiving means in the light receiving direction of the light receiving means, that is, when the detection position is viewed from the light receiving means. Is provided, and the light quantity of the projection member can be changed and adjusted by the background light quantity adjusting means.
 投射部材の光量を例えば正常物としての検査対象物から得られる光量と同じ光量に調整しておき、受光手段にてその光量に対して適正光量範囲を設定しておくと、背景の光量を計測しても異常と判断することはなく、検査対象物として異常物が存在するときにのみ光量が適正光量範囲を外れて異常物であると判断することができる。 For example, if the light intensity of the projection member is adjusted to the same light intensity as that obtained from the inspection object as a normal object, and the appropriate light intensity range is set for the light intensity by the light receiving means, the light intensity of the background is measured. Even if the abnormal object exists as the inspection object, it is possible to determine that the light amount is out of the appropriate light amount range and is an abnormal object.
 そして、検査対象物の種類が異なると正常物としての検査対象物から得られる光量が異なるような場合であっても、その光量に合わせるように投射部材の光量を変更調整することで対応でき、例えば、検査対象物の種類が異なる毎に光量の異なる投射部材に付け替える等の手間が不要で使い勝手のよいものとなる。 And even if the amount of light obtained from the inspection object as a normal object differs if the type of inspection object is different, it can be handled by changing and adjusting the light amount of the projection member to match that light amount, For example, each time the type of inspection object is different, there is no need for the trouble of changing to a projection member having a different amount of light, and the convenience is improved.
 本発明の第2特徴構成は、検査対象物としての粒状体群を検出箇所を通過させるように移送する移送手段と、前記検出箇所を照明する照明手段と、前記検出箇所からの光を受光する受光部を有した受光手段と、前記受光部の受光量が正常物に対応する適正光量範囲を外れているか否かにより正常物であるか異常物であるかを判別する判別手段とを備え、前記照明手段が、照明用光源と、その照明用光源から前記検出箇所に向けて出射された光を拡散光として透過させる拡散透過部材とを備えて構成され、前記拡散透過部材を前記検出箇所から離れる外方側に向けて凸状に湾曲する凸状曲面に形成した状態で備え、前記照明用光源を前記拡散透過部材よりも前記外方側の箇所に前記凸状曲面に沿って位置する状態で備え、前記受光部が前記検出箇所から受光するための受光経路に、前記検出箇所に向かう入射光を反射光と透過光とに分割処理する分割処理膜が備えられた光透過体を設けてある点にある。 The second characteristic configuration of the present invention is configured to receive a light from the detection point, a transfer unit that transfers the granular material group as the inspection target so as to pass through the detection point, an illumination unit that illuminates the detection point, and the like. A light receiving unit having a light receiving unit, and a determination unit that determines whether the received light amount of the light receiving unit is normal or abnormal depending on whether or not the amount of light received outside a proper light amount range corresponding to a normal product, The illumination means includes an illumination light source, and a diffusion transmission member that transmits light emitted from the illumination light source toward the detection location as diffused light, and the diffusion transmission member is removed from the detection location. A state in which the illumination light source is formed along a convex curved surface at a location on the outer side of the diffuse transmission member with a convex curved surface curved convexly toward the outer side away And the light receiving unit is A receiving path for receiving the point lies in that is provided with a transparent member which division processing film provided for dividing process incident light toward the detection position in the reflected light and transmitted light.
 本構成によれば、第1特徴構成の作用効果に加えて以下の作用効果を奏する。
 つまり、本特徴構成によれば、検出箇所に向かう方向で分割処理膜に入射する入射光が分割処理膜によって検出箇所に届かない反射光と、検出箇所に届く透過光とに分割処理されるから、受光部のレンズに暗い箇所が発生しても、この暗い箇所が検出箇所に位置する検査対象物に写り難い。つまり、検査対象物に受光部におけるレンズの暗い箇所に起因した暗い影が発生し、検査対象物が暗い箇所を備えるものとして受光部に写り込むことを回避し易く、かつ受光部におけるレンズの絞りを閉じ側に調整した状態、すなわち被写界深度が高い状態で受光部による撮像をできる。
According to this structure, in addition to the effect of a 1st characteristic structure, there exist the following effects.
In other words, according to this feature configuration, the incident light incident on the split processing film in the direction toward the detection location is split by the split processing film into reflected light that does not reach the detection location and transmitted light that reaches the detection location. Even if a dark spot occurs in the lens of the light receiving unit, the dark spot is difficult to be reflected on the inspection object located at the detection spot. In other words, it is easy to avoid a dark shadow caused by the dark part of the lens in the light receiving unit on the inspection object, and it is easy to avoid the inspection object being reflected in the light receiving part as having a dark part, and the lens aperture in the light receiving unit Can be imaged by the light receiving unit in a state where is adjusted to the closed side, that is, in a state where the depth of field is high.
 このように広い範囲にわたり略均等に拡散された光を照射することにより、例えば、透明のペレット等の透明な検査対象物を対象とするものであっても、検出箇所に位置する検査対象物に対して照射手段にて照明される光が、検査対象物の外周部の広い範囲にわたって略均等に拡散された状態となるので、かつ受光部におけるレンズの暗い箇所を検査対象物に写り込み難くできると共に受光部による撮像を被写界深度が高い状態でできるので、全ての領域で同じ透明度を有する正常な検査対象物(樹脂ペレット)であれば、受光手段にて受光される受光情報として、光の強さが大きい特に明るい部分や光の強さが小さい影の部分等が生じるおそれがなく誤判別のおそれが少ないものになる。 By irradiating light that is diffused substantially uniformly over such a wide range, for example, even for a transparent inspection object such as a transparent pellet, the inspection object positioned at the detection location On the other hand, the light illuminated by the irradiating means is in a state of being almost uniformly diffused over a wide range of the outer peripheral portion of the inspection object, and it is difficult to reflect the dark spot of the lens in the light receiving unit on the inspection object. In addition, since the imaging by the light receiving unit can be performed in a state where the depth of field is high, if the normal inspection object (resin pellet) has the same transparency in all regions, the light receiving information received by the light receiving means is light. In particular, there is no possibility that a bright part having a large intensity or a shadow part having a small light intensity or the like is generated, and the possibility of erroneous determination is reduced.
 従って、透明な粒状体群を検出対象物とするような場合であっても、正常物であるか異常物であるかの判別を良好に行うことが可能な高品質の粒状体検査装置を得ることができる。 Therefore, even when a transparent granular material group is used as a detection target, a high-quality granularity inspection apparatus capable of determining whether it is normal or abnormal is obtained. be able to.
 本発明の第3特徴構成は、検査対象物としての粒状体群を検出箇所を通過させるように移送する移送手段と、前記検出箇所を照明する照明手段と、前記検出箇所からの光を受光する受光部を有する受光手段と、前記受光部の受光量が正常物に対応する適正光量範囲を外れているか否かにより正常物であるか異常物であるかを判別する判別手段とが備えられ、前記照明手段が、照明用光源と、その照明用光源から前記検出箇所に向けて出射された光を拡散光として透過させる拡散透過部材とを備え、前記拡散透過部材を前記検出箇所から離れる外方側に向けて凸状に湾曲する凸状曲面に形成した状態で備え、前記照明用光源を前記拡散透過部材よりも前記外方側の箇所に前記凸状曲面に沿って位置する状態で備え、前記受光部と前記拡散透過部材との間に、前記受光部のためのレンズフード手段を設けてある粒状体検査装置点にある。 The third characteristic configuration of the present invention is configured to receive a light from the detection portion, a transfer means for transferring the granular material group as the inspection object so as to pass through the detection portion, an illumination means for illuminating the detection portion, and the like. A light receiving unit having a light receiving unit, and a determination unit that determines whether the light received by the light receiving unit is normal or abnormal depending on whether the amount of received light is out of an appropriate light amount range corresponding to a normal object, The illuminating means includes an illumination light source, and a diffusion transmission member that transmits light emitted from the illumination light source toward the detection location as diffused light, and the outside that separates the diffusion transmission member from the detection location It is provided with a state where it is formed in a convex curved surface that curves convexly toward the side, and the illumination light source is provided in a state located along the convex curved surface at a location on the outer side than the diffuse transmission member, The light receiving part and the diffuse transmission Between the wood, in granulate inspection device points is provided with a lens hood means for the light receiving portion.
 本構成によれば、第2特徴構成と同様に、照明手段における拡散透過部材が検出箇所から離れる外方側に向けて凸状に湾曲する凸状曲面に形成する状態で備えられ、照明用光源が拡散透過部材よりも外方側の箇所に拡散透過部材における凸状曲面に沿って位置する状態で備えられることから、検出箇所に位置する検査対象物に対して、受光手段に導かれる受光経路に略沿う方向の光だけでなく、その受光経路に略沿う方向に対して略直交する方向の光等、凸状曲面に沿って互いに位置が異なる箇所から光を照射させることが可能となるので、検出箇所に位置する検査対象物に対して、広い範囲にわたり均等に拡散された光を照射することができる。 According to this configuration, similarly to the second feature configuration, the diffusing and transmitting member in the illuminating means is provided in a state of forming a convex curved surface that curves in a convex shape toward the outer side away from the detection location, and the illumination light source Is provided in a state of being located along the convex curved surface of the diffusing and transmitting member at a location on the outer side of the diffusing and transmitting member. It is possible to irradiate light from locations different from each other along the convex curved surface, such as light in a direction substantially perpendicular to the direction along the light receiving path, as well as light in a direction substantially along the light receiving path. The inspection object located at the detection location can be irradiated with light that is uniformly diffused over a wide range.
 また、本構成によれば、拡散透過部材から受光部が位置する側に反射した反射光などの斜めからの光が受光部に入り込むことをレンズフード手段によって回避し易い。つまり、検出箇所からの光以外の光が受光部に入り込み難くて、受光部における検査対象物の撮像を鮮明にし易い。 Further, according to this configuration, it is easy to avoid the oblique light such as reflected light reflected from the diffuse transmission member toward the side where the light receiving unit is located into the light receiving unit by the lens hood means. That is, it is difficult for light other than the light from the detection portion to enter the light receiving unit, and it is easy to clearly image the inspection object in the light receiving unit.
 このように広い範囲にわたり略均等に拡散された光を照射することにより、例えば、透明のペレット等の透明な検査対象物を対象とするものであっても、検出箇所に位置する検査対象物に対して照射手段にて照明される光が、検査対象物の外周部の広い範囲にわたって略均等に拡散された状態となるので、かつ受光部に斜めからの光が入り込み難くて、撮像を鮮明にし易いので、全ての領域で同じ透明度を有する正常な検査対象物(樹脂ペレット)であれば、受光手段にて受光される受光情報として、光の強さが大きい特に明るい部分や光の強さが小さい影の部分等が生じるおそれがなく誤判別のおそれが少ないものになる。 By irradiating light that is diffused substantially uniformly over such a wide range, for example, even for a transparent inspection object such as a transparent pellet, the inspection object positioned at the detection location On the other hand, the light illuminated by the irradiating means is in a state of being diffused substantially evenly over a wide range of the outer peripheral portion of the inspection object, and light from an oblique direction does not easily enter the light receiving portion, so that the imaging is clear. If it is a normal inspection object (resin pellet) that has the same transparency in all areas, the light receiving information received by the light receiving means is a particularly bright part or a light intensity with a large light intensity. There is no risk of small shadows or the like, and there is little risk of misjudgment.
 従って、透明な粒状体群を検出対象物とするような場合であっても、正常物であるか異常物であるかの判別を良好に行うことが可能な高品質の粒状体検査装置を得ることができる。 Therefore, even when a transparent granular material group is used as a detection target, a high-quality granularity inspection apparatus capable of determining whether it is normal or abnormal is obtained. be able to.
 本発明の第4特徴構成は、検査対象物としての粒状体群を検出箇所を通過させるように移送する移送手段と、前記検出箇所を照明する照明手段と、前記検出箇所からの光を受光する受光部を有した受光手段と、前記受光部の受光量が正常物に対応する適正光量範囲を外れているか否かにより正常物であるか異常物であるかを判別する判別手段とを備え、前記照明手段が、照明用光源と、その照明用光源から前記検出箇所に向けて出射された光を拡散光として透過させる拡散透過部材とを備えて構成され、前記拡散透過部材を前記検出箇所から離れる外方側に向けて凸状に湾曲する凸状曲面に形成した状態で備え、前記照明用光源を前記拡散透過部材よりも前記外方側の箇所に前記凸状曲面に沿って位置する状態で備え、前記受光部が前記検出箇所から受光するための受光経路に、前記検出箇所に向かう入射光を反射光と透過光とに分割処理する分割処理膜が備えられた光透過体を設け、
 前記受光部と前記拡散透過部材との間に、前記受光部のためのレンズフード手段を設けてある点にある。
The fourth characteristic configuration of the present invention is configured to receive a light from the detection portion, a transfer means for transferring the granular material group as the inspection object so as to pass through the detection portion, an illumination means for illuminating the detection portion, and the like. A light receiving unit having a light receiving unit, and a determination unit that determines whether the received light amount of the light receiving unit is normal or abnormal depending on whether or not the amount of light received outside a proper light amount range corresponding to a normal product, The illumination means includes an illumination light source, and a diffusion transmission member that transmits light emitted from the illumination light source toward the detection location as diffused light, and the diffusion transmission member is removed from the detection location. A state in which the illumination light source is formed along a convex curved surface at a location on the outer side of the diffuse transmission member with a convex curved surface curved convexly toward the outer side away The light receiving unit is provided with the detection A receiving path for receiving from where, provided the transparent member which division processing film provided for dividing process incident light toward the detection position in the reflected light and transmitted light,
The lens hood means for the light receiving part is provided between the light receiving part and the diffuse transmission member.
 本構成によれば、第2特徴構成と同様に、照明手段における拡散透過部材が検出箇所から離れる外方側に向けて凸状に湾曲する凸状曲面に形成する状態で備えられ、照明用光源が拡散透過部材よりも外方側の箇所に拡散透過部材における凸状曲面に沿って位置する状態で備えられることから、検出箇所に位置する検査対象物に対して、受光手段に導かれる受光経路に略沿う方向の光だけでなく、その受光経路に略沿う方向に対して略直交する方向の光等、凸状曲面に沿って互いに位置が異なる箇所から光を照射させることが可能となるので、検出箇所に位置する検査対象物に対して、広い範囲にわたり均等に拡散された光を照射することができる。 According to this configuration, similarly to the second feature configuration, the diffusing and transmitting member in the illuminating means is provided in a state of forming a convex curved surface that curves in a convex shape toward the outer side away from the detection location, and the illumination light source Is provided in a state of being located along the convex curved surface of the diffusing and transmitting member at a location on the outer side of the diffusing and transmitting member. It is possible to irradiate light from locations different from each other along the convex curved surface, such as light in a direction substantially perpendicular to the direction along the light receiving path, as well as light in a direction substantially along the light receiving path. The inspection object located at the detection location can be irradiated with light that is uniformly diffused over a wide range.
 また、本構成によれば、第2特徴構成と同様に、検出箇所に向かう方向で分割処理膜に入射する入射光が分割処理膜によって検出箇所に届かない反射光と、検出箇所に届く透過光とに分割処理されるから、受光部のレンズに暗い箇所が発生しても、検査対象物が暗い箇所を備えるものとして受光部に写り込むことを回避し易く、かつ被写界深度が高い状態で受光部による撮像をできる。 Further, according to this configuration, similarly to the second feature configuration, the incident light incident on the split processing film in the direction toward the detection location is reflected light that does not reach the detection location by the split processing film, and transmitted light reaches the detection location. Therefore, even if a dark spot occurs in the lens of the light receiving part, it is easy to avoid the object to be reflected in the light receiving part as having a dark part, and the depth of field is high. The image can be taken by the light receiving unit.
 また、本構成によれば、第3特徴構成と同様に、拡散透過部材から受光部が位置する側に反射した反射光などの斜めからの光が受光部に入り込むことをレンズフード手段によって回避し易くて、受光部における検査対象物の撮像を鮮明にし易い。 Further, according to this configuration, similarly to the third feature configuration, the lens hood means avoids obliquely incident light such as reflected light reflected from the diffuse transmission member toward the side where the light receiving unit is located. It is easy to make clear the imaging of the inspection object in the light receiving unit.
 このように広い範囲にわたり略均等に拡散された光を照射することにより、例えば、透明のペレット等の透明な検査対象物を対象とするものであっても、検出箇所に位置する検査対象物に対して照射手段にて照明される光が、検査対象物の外周部の広い範囲にわたって略均等に拡散された状態となるので、かつ受光部におけるレンズの暗い箇所を検査対象物に写り込み難くできると共に受光部による撮像を被写界深度が高い状態でできるので、さらに、受光部に斜めからの光が入り込み難くて、撮像を鮮明にし易いので、全ての領域で同じ透明度を有する正常な検査対象物(樹脂ペレット)であれば、受光手段にて受光される受光情報として、光の強さが大きい特に明るい部分や光の強さが小さい影の部分等が生じるおそれがなく誤判別のおそれが少ないものになる。 By irradiating light that is diffused substantially uniformly over such a wide range, for example, even for a transparent inspection object such as a transparent pellet, the inspection object positioned at the detection location On the other hand, the light illuminated by the irradiating means is in a state of being almost uniformly diffused over a wide range of the outer peripheral portion of the inspection object, and it is difficult to reflect the dark spot of the lens in the light receiving unit on the inspection object. At the same time, the imaging with the light receiving unit can be performed with a high depth of field, and further, it is difficult for light from an oblique direction to enter the light receiving unit, and it is easy to make the imaging clear, so normal inspection objects having the same transparency in all areas If it is an object (resin pellet), the light receiving information received by the light receiving means is not misidentified as there is no possibility that a particularly bright part having a high light intensity or a shadow part having a low light intensity may occur. It becomes what it is small.
 従って、透明な粒状体群を検出対象物とするような場合であっても、正常物であるか異常物であるかの判別を良好に行うことが可能な高品質の粒状体検査装置を得ることができる。 Therefore, even when a transparent granular material group is used as a detection target, a high-quality granularity inspection apparatus capable of determining whether it is normal or abnormal is obtained. be able to.
 上記構成において、前記光透過体の前記検出箇所に向う側の側面に前記分割処理膜が備えられ、前記光透過体の前記受光部に向う側の側面に反射防止膜が備えられると好適である。 In the above configuration, it is preferable that the split processing film is provided on a side surface of the light transmitting body facing the detection portion, and an antireflection film is provided on a side surface of the light transmitting body facing the light receiving portion.
 分割処理膜は、光透過体の側面を鏡面状に形成し、受光部に向う反射光を発生させ易い。本構成によると、光透過体の受光部に向う側面での反射光の発生を反射防止膜によって抑制できる。つまり、光透過体に分割処理膜を備えるものでありながら、光透過体において受光部に向かう状態で発生する反射光を弱く抑制できる。 The split processing film forms the side surface of the light transmitting body in a mirror shape and easily generates reflected light toward the light receiving unit. According to this structure, generation | occurence | production of the reflected light in the side surface which faces the light-receiving part of a light transmissive body can be suppressed by an antireflection film. That is, although the light transmission body is provided with the divided processing film, the reflected light generated in the state toward the light receiving portion in the light transmission body can be suppressed weakly.
 従って、本発明によると、分割処理膜が備えられた光透過体を設けて、受光部におけるレンズの暗い箇所が検査対象物に写り込むことを回避し易いものでありながら、光透過体から受光部が位置する側に向かう反射光の発生を抑制して、受光部に斜めから入り込む光を抑制できる。 Therefore, according to the present invention, the light transmitting body provided with the divided processing film is provided, and it is easy to avoid the dark spot of the lens in the light receiving unit from appearing on the inspection object, but the light receiving body receives light from the light transmitting body. Generation of reflected light toward the side where the part is located can be suppressed, and light entering the light receiving part from an oblique direction can be suppressed.
 上記構成において、前記レンズフード手段が、前記受光経路が通るフード筒部と、前記フード筒部の外周囲の前記受光部と前記照明用光源との間の箇所に位置する遮光板部とを備えて構成されると好適である。 In the above configuration, the lens hood means includes a hood tube portion through which the light receiving path passes, and a light shielding plate portion positioned at a location between the light receiving portion and the illumination light source on the outer periphery of the hood tube portion. It is preferable to be configured.
 本特徴構成によると、受光部に斜めからの光が入り込むことをフード筒部によって効果的に回避できるのみならず、フード筒部の外周囲の広い範囲からの反射光が受光部に入り込むことを遮光板部によって効果的に回避できる。 According to this feature configuration, not only can the hood tube part effectively prevent oblique light from entering the light receiving unit, but also reflected light from a wide area around the hood tube part can enter the light receiving unit. This can be effectively avoided by the light shielding plate.
 従って、本発明によると、検出箇所からの光以外の光が受光部に入り込むことを効果的に回避して、受光部による検査対象物の撮像を鮮明にできる。 Therefore, according to the present invention, it is possible to effectively avoid the light other than the light from the detection point from entering the light receiving unit, and to clearly image the inspection object by the light receiving unit.
 上記構成において、前記遮光板部に、前記検出箇所に向かう反射光を発生させる反射部を備えると好適である。 In the above configuration, it is preferable that the light-shielding plate portion includes a reflection portion that generates reflected light toward the detection location.
 本特徴構成によると、照明用光源や拡散透過部材から受光部が位置する側に漏れるとか反射した光を、反射部によって検出箇所に向けて反射させて検査対象物の照明用にできる。 According to this characteristic configuration, the light that leaks or is reflected from the illumination light source or the diffuse transmission member to the side where the light receiving unit is located can be reflected toward the detection location by the reflection unit, and can be used for illumination of the inspection object.
 従って、本発明によると、照明光源から出て受光部が位置する側に漏れ出たり反射したりした光を、検査対象物の照明に無駄なく使用できる。 Therefore, according to the present invention, the light that has exited from the illumination light source and leaked or reflected to the side where the light receiving unit is located can be used for illumination of the inspection object without waste.
 上記構成において、前記照明用光源、前記拡散透過部材及び前記受光部それぞれの一対が、検査対象物が移動落下する移動落下経路のうちの前記検出箇所を含む部位を挟む状態で配備されると好適である。 In the above-described configuration, it is preferable that a pair of each of the illumination light source, the diffusive transmission member, and the light receiving unit is disposed in a state of sandwiching a portion including the detection location in a moving and falling path along which the inspection target moves and drops. It is.
 本特徴構成によると、検出箇所に位置する検査対象物の移動落下方向に対して交差する方向での一方の側部を、一対の照明用光源、拡散透過部材及び受光部のうちの一方の照明用光源、拡散透過部材及び受光部の作用によって検査でき、検出箇所に位置する検査対象物の移動落下方向に対して交差する方向での他方の側部を、一対の照明用光源、拡散透過部材及び受光部のうちの他方の照明用光源、拡散透過部材及び受光部の作用によって検査できる。 According to this characteristic configuration, one side portion in a direction intersecting the moving and dropping direction of the inspection target located at the detection location is illuminated with one of the pair of illumination light source, diffuse transmission member, and light receiving portion. The other side in the direction intersecting the moving and dropping direction of the inspection object located at the detection location can be inspected by the action of the light source for light, the diffuse transmission member and the light receiving portion. And the other illumination light source, diffuse transmission member, and light receiving portion of the light receiving portion.
 一対の受光部を備える場合、一方の受光部のレンズの暗い箇所が検査対象物に写り込むと、正常物の検査対象物であっても、暗い箇所が存在するものとして他方の受光部に写り込み易いが、この写り込みを、分割処理膜によって効果的に回避できる。 When a pair of light receiving parts is provided, if a dark spot on the lens of one light receiving part is reflected on the inspection object, even if it is a normal inspection object, the dark part is present on the other light receiving part. This reflection can be effectively avoided by the divided processing film.
 従って、本発明によると、検査対象物の全体にわたる検査を一対の照明用光源、拡散透過部材及び受光部の作用によって適性に行なうことができる。 Therefore, according to the present invention, the entire inspection object can be inspected appropriately by the action of the pair of illumination light source, diffuse transmission member and light receiving portion.
 本発明の第5特徴構成は、検査対象物としての粒状体群を検出箇所を通過させるように移送する移送手段と、前記検出箇所を照明する照明手段と、前記検出箇所からの光を受光する受光手段と、前記受光手段の受光量が正常物に対応する適正光量範囲を外れているか否かにより正常物であるか異常物であるかを判別する判別手段とを備え、前記照明手段が、照明用光源と、その照明用光源から前記検出箇所に向けて出射された光を拡散光として透過させる拡散透過部材とを備えて構成され、前記拡散透過部材を前記検出箇所から離れる外方側に向けて凸状に湾曲する凸状曲面に形成した状態で備え、前記照明用光源を前記拡散透過部材よりも前記外方側の箇所に前記凸状曲面に沿って位置する状態で備え、検査対象物が移動落下する移動落下経路のうちの前記検出箇所を含む部位の横側方に位置する箇所であって、前記受光手段の受光方向に交差する方向での前記拡散透過部材の横側方に位置する箇所に、前記検出箇所に向かう反射光を発生させる反射部材を設けてある点にある。 The fifth characteristic configuration of the present invention is configured to receive a light from the detection point, a transfer unit that transfers the granular material group as the inspection target so as to pass through the detection point, an illumination unit that illuminates the detection point, and the like. A light receiving unit; and a determination unit that determines whether the received light amount of the light receiving unit is normal or abnormal depending on whether the amount of light received from the light receiving unit is out of an appropriate light amount range corresponding to a normal object. An illumination light source; and a diffusion transmission member that transmits light emitted from the illumination light source toward the detection location as diffused light, and the diffusion transmission member is disposed on the outer side away from the detection location. An object to be inspected, provided in a state of being formed into a convex curved surface that is curved in a convex shape, and provided with the illumination light source in a state of being located along the convex curved surface at a location on the outer side of the diffuse transmission member Moving drop where things move and fall The detection is performed at a location located on a lateral side of a portion including the detection location in the path, and located on a lateral side of the diffuse transmission member in a direction intersecting a light receiving direction of the light receiving means. This is in that a reflecting member for generating reflected light toward the place is provided.
 本特徴構成によれば、第1特徴構成の作用効果に加えて以下の作用効果を奏する。
 つまり、検出箇所から横外側に漏れ出ようとする光が、反射部材によって検出箇所に向けて反射し、検査対象物のうちの横側部であって、照明手段からの光が当りにくいと共に受光部に向かわず、暗くなった状態で受光部に写り込み易い横側部を照明することになる。
According to this characteristic configuration, the following operational effects are provided in addition to the operational effects of the first characteristic configuration.
In other words, the light that leaks from the detection location to the lateral outside is reflected by the reflecting member toward the detection location, and is the lateral side portion of the inspection object, and the light from the illumination means is difficult to hit and is received. The side part which is easy to be reflected in the light receiving part in the dark state is not illuminated.
 すなわち、照明用光源から検出箇所に出射され、検出箇所から横外側に漏れ出ようとする光を、暗く写り込み易い検査対象物の横側部の照明に無駄なく使用できる。 That is, the light emitted from the illumination light source to the detection location and leaking from the detection location to the lateral outside can be used for illumination of the lateral side of the inspection object that is dark and easily reflected.
 このように広い範囲にわたり略均等に拡散された光を照射することにより、例えば、透明のペレット等の透明な検査対象物を対象とするものであっても、検出箇所に位置する検査対象物に対して照射手段にて照明される光が、検査対象物の外周部の広い範囲にわたって略均等に拡散された状態となるので、かつ暗く写り込み易い検査対象物の横側部を照明できるので、全ての領域で同じ透明度を有する正常な検査対象物(樹脂ペレット)であれば、受光手段にて受光される受光情報として、光の強さが大きい特に明るい部分や光の強さが小さい影の部分等が生じるおそれがなく誤判別のおそれが少ないものになる。 By irradiating light that is diffused substantially uniformly over such a wide range, for example, even for a transparent inspection object such as a transparent pellet, the inspection object positioned at the detection location On the other hand, the light illuminated by the irradiating means is in a state of being diffused substantially uniformly over a wide range of the outer peripheral portion of the inspection object, and can illuminate the lateral side portion of the inspection object that is dark and easily reflected, If it is a normal inspection object (resin pellet) having the same transparency in all areas, the light receiving information received by the light receiving means is a particularly bright part with a large light intensity or a shadow with a small light intensity. There is no possibility of occurrence of a portion or the like, and there is little risk of erroneous determination.
 従って、透明な粒状体群を検出対象物とするような場合であっても、正常物であるか異常物であるかの判別を良好に行うことが可能な高品質の粒状体検査装置を得ることができる。 Therefore, even when a transparent granular material group is used as a detection target, a high-quality granularity inspection apparatus capable of determining whether it is normal or abnormal is obtained. be able to.
 本発明の第6特徴構成は、検査対象物としての粒状体群を検出箇所を通過させるように移送する移送手段と、前記検出箇所を照明する照明手段と、前記検出箇所からの光を受光する受光手段と、前記受光手段の受光量が正常物に対応する適正光量範囲を外れているか否かにより正常物であるか異常物であるかを判別する判別手段とを備え、前記照明手段が、照明用光源と、その照明用光源から前記検出箇所に向けて出射された光を拡散光として透過させる拡散透過部材とを備えて構成され、前記拡散透過部材を前記検出箇所から離れる外方側に向けて凸状に湾曲する凸状曲面に形成する状態で備え、前記照明用光源が、前記拡散透過部材よりも前記外方側の箇所に前記凸状曲面に沿う状態で、かつ検査対象物が移動落下する移動落下経路のうちの前記検出箇所を含む部位における検査対象物の移動方向に並ぶ状態で複数の発光部を備えて構成され、前記複数の発光部のうちの検査対象物移動方向上手側に位置する上手側発光部、及び検査対象物移動方向下手側に位置する下手側発光部の照射範囲を、前記複数の発光部のうちの前記上手側発光部と前記下手側発光部との間に位置する中発光部の照射範囲よりも狭く設定してある点にある。 A sixth characteristic configuration of the present invention is configured to receive a light from the detection part, a transfer means for transferring the granular material group as the inspection object so as to pass through the detection part, an illuminating unit that illuminates the detection part, and the like. A light receiving unit; and a determination unit that determines whether the received light amount of the light receiving unit is normal or abnormal depending on whether the amount of light received from the light receiving unit is out of an appropriate light amount range corresponding to a normal object. An illumination light source; and a diffusion transmission member that transmits light emitted from the illumination light source toward the detection location as diffused light, and the diffusion transmission member is disposed on the outer side away from the detection location. The illumination light source is in a state along the convex curved surface at a position on the outer side of the diffuse transmission member, and the inspection object is provided. Moving and falling path of moving and falling The upper-side light-emitting portion that is configured to include a plurality of light-emitting portions in a state of being aligned in the moving direction of the inspection object in the portion including the detection location, and is located on the upper side of the inspection-object moving direction among the plurality of light-emitting portions And the irradiation range of the lower-side light emitting unit located on the lower side in the moving direction of the inspection object, the middle light emitting unit located between the upper-side light emitting unit and the lower-side light emitting unit among the plurality of light emitting units. It is in the point set narrower than the irradiation range.
 本構成によれば、第5特徴構成と同様に、照明手段における拡散透過部材が検出箇所から離れる外方側に向けて凸状に湾曲する凸状曲面に形成する状態で備えられ、照明用光源が拡散透過部材よりも外方側の箇所に拡散透過部材における凸状曲面に沿って位置する状態で備えられることから、検出箇所に位置する検査対象物に対して、受光手段に導かれる受光経路に略沿う方向の光だけでなく、その受光経路に略沿う方向に対して略直交する方向の光等、凸状曲面に沿って互いに位置が異なる箇所から光を照射させることが可能となるので、検出箇所に位置する検査対象物に対して、広い範囲にわたり均等に拡散された光を照射することができる。 According to this configuration, similarly to the fifth feature configuration, the diffusing and transmitting member in the illuminating means is provided in a state of forming a convex curved surface that curves in a convex shape toward the outer side away from the detection location, and the illumination light source Is provided in a state of being located along the convex curved surface of the diffusing and transmitting member at a location on the outer side of the diffusing and transmitting member, so that the light receiving path guided to the light receiving means for the inspection object located at the detecting location It is possible to irradiate light from locations different from each other along the convex curved surface, such as light in a direction substantially perpendicular to the direction along the light receiving path, as well as light in a direction substantially along the light receiving path. The inspection object located at the detection location can be irradiated with light that is uniformly diffused over a wide range.
 本構成によると、出射する光が検査対象物の上端部に当たる上手側発光部、及び出射する光が検査対象物の下端部に当たる下手側発光部の照射範囲を、出射する光が検査対象物の中間部に当たる中発行部の照射範囲より狭く設定してあるから、ハレーションの発生を回避しながら、正常物の検査対象物であるにもかかわらず、上端部や下端部が暗くなった状態で受光手段に写ることを防止できる。 According to this configuration, the upper side light emitting portion where the emitted light hits the upper end portion of the inspection object, and the irradiation range of the lower side light emitting portion where the emitted light hits the lower end portion of the inspection object, the emitted light is the Since it is set to be narrower than the irradiation range of the middle issuer that hits the middle part, it avoids the occurrence of halation and receives light in the state where the upper and lower ends are dark despite being a normal inspection object. It can be prevented from being reflected in the means.
 すなわち、検出箇所に位置するペレットの中間部の表面形状が横向きに凸の円弧や湾曲形状となっても、ペレットの中間部に当った光は、受光手段に向かって反射し易い。これに対し、検出箇所に位置するペレットの上端部の表面形状は、上向きに凸の円弧や湾曲形状あるいはそれに近い形状となり、検出箇所に位置するペレットの下端部の表面形状は、下向きに凸の円弧や湾曲形状あるいはそれに近い形状となることにより、ペレットの上端部及び下端部では、中間部に比べ、受光手段に向かって反射する光が弱くなり易い。 That is, even if the surface shape of the intermediate portion of the pellet located at the detection location is a horizontally convex arc or curved shape, the light hitting the intermediate portion of the pellet is easily reflected toward the light receiving means. On the other hand, the surface shape of the upper end portion of the pellet located at the detection location is an upwardly convex arc or curved shape, or a shape close thereto, and the surface shape of the lower end portion of the pellet located at the detection location is convex downward. By forming an arc, a curved shape, or a shape close thereto, light reflected toward the light receiving means tends to be weaker at the upper end and lower end of the pellet than at the intermediate portion.
 しかし、出射する光が検査対象物の上端部に当たる上手側発光部、及び出射する光が検査対象物の下端部に当たる下手側発光部の照射範囲を、出射する光が検査対象物の中間部に当たる中発行部の照射範囲より狭く設定してあるから、上手側発光部及び下手側発光部は、中発行部よりも集中した強い光を検査対象物の上端部や下端部に向けて出射することになり、検査対象物の上端部及び下端部から受光手段に向かう反射光と、検査対象物の中間部から受光手段に向かう反射光との強さの差が無いとかあまり無いことになる。 However, the emitted light hits the intermediate part of the inspection object, and the emitted light hits the irradiation range of the upper light emitting part where the emitted light hits the upper end of the inspection object and the lower light emitting part where the emitted light hits the lower end of the inspection object. Since it is set to be narrower than the irradiation range of the middle issuer, the upper side light emitting part and the lower side light emitting part should emit strong light that is more concentrated than the middle issue part toward the upper and lower ends of the inspection object. Thus, there is no difference in intensity between the reflected light from the upper end and the lower end of the inspection object toward the light receiving means and the intensity of the reflected light from the intermediate part of the inspection object toward the light receiving means.
 また、検査対象物の上端部及び下端部から受光手段に向かう反射光が適切な強さの反射光になるように設定した上手側発光部及び下手側発光部の照射範囲と同じ狭い照射範囲を中発行部に備えた場合、検査対象物の中間部に強い光が集中的に当ってハレーションが発生し易い。しかし、本特徴構成によると、中発行部の照射範囲が上手側発光部及び下手側発光部の照射範囲より広いことにより、ハレーションの発生を回避できる。 In addition, the narrow irradiation range that is the same as the irradiation range of the upper-side light-emitting unit and the lower-side light-emitting unit set so that the reflected light from the upper end and lower end of the object to be inspected to the light-receiving means has an appropriate intensity. When the middle issuer is provided, halation is likely to occur due to the intense light intensively hitting the intermediate part of the inspection object. However, according to this characteristic configuration, the occurrence of halation can be avoided because the irradiation range of the middle issuer is wider than the irradiation range of the upper light emitting unit and the lower light emitting unit.
 このように広い範囲にわたり略均等に拡散された光を照射することにより、例えば、透明のペレット等の透明な検査対象物を対象とするものであっても、検出箇所に位置する検査対象物に対して照射手段にて照明される光が、検査対象物の外周部の広い範囲にわたって略均等に拡散された状態となるので、かつ暗く写り込み易い検査対象物の上端部及び下端部の照明を効果的にできると共に中間部におけるハレーションを回避できるので、全ての領域で同じ透明度を有する正常な検査対象物(樹脂ペレット)であれば、受光手段にて受光される受光情報として、光の強さが大きい特に明るい部分や光の強さが小さい影の部分等が生じるおそれがなく誤判別のおそれが少ないものになる。 By irradiating light that is diffused substantially uniformly over such a wide range, for example, even for a transparent inspection object such as a transparent pellet, the inspection object positioned at the detection location On the other hand, the light illuminated by the irradiating means is in a state of being diffused substantially evenly over a wide range of the outer peripheral portion of the inspection object, and illumination of the upper end and lower end of the inspection object that is dark and easily reflected Since it is effective and can avoid the halation in the intermediate part, if it is a normal inspection object (resin pellet) having the same transparency in all regions, the light intensity is received as light reception information received by the light receiving means. In particular, there is no possibility that a particularly bright part having a large light or a shadow part having a small light intensity will be generated, and there is less possibility of erroneous determination.
 従って、透明な粒状体群を検出対象物とするような場合であっても、正常物であるか異常物であるかの判別を良好に行うことが可能な高品質の粒状体検査装置を得ることができる。 Therefore, even when a transparent granular material group is used as a detection target, a high-quality granularity inspection apparatus capable of determining whether it is normal or abnormal is obtained. be able to.
 本発明の第7特徴構成は、検査対象物としての粒状体群を検出箇所を通過させるように移送する移送手段と、前記検出箇所を照明する照明手段と、前記検出箇所からの光を受光する受光手段と、前記受光手段の受光量が正常物に対応する適正光量範囲を外れているか否かにより正常物であるか異常物であるかを判別する判別手段とを備え、前記照明手段が、照明用光源と、その照明用光源から前記検出箇所に向けて出射された光を拡散光として透過させる拡散透過部材とを備えて構成され、前記拡散透過部材を前記検出箇所から離れる外方側に向けて凸状に湾曲する凸状曲面に形成した状態で備え、検査対象物が移動落下する移動落下経路のうちの前記検出箇所を含む部位の横側方に位置する箇所であって、前記受光手段の受光方向に交差する方向での前記拡散透過部材の横側方に位置する箇所に、前記検出箇所に向かう反射光を発生させる反射部材を設け、前記照明用光源が、前記拡散透過部材よりも前記外方側の箇所に前記凸状曲面に沿う状態で、かつ前記移動落下経路の部位における検査対象物の移動方向に並ぶ状態で複数の発光部を備えて構成され、前記複数の発光部のうちの検査対象物移動方向上手側に位置する上手側発光部、及び検査対象物移動方向下手側に位置する下手側発光部の照射範囲を、前記複数の発光部のうちの前記上手側発光部と前記下手側発光部との間に位置する中発光部の照射範囲よりも狭く設定してある点にある。 The seventh characteristic configuration of the present invention is configured to receive a light from the detection part, a transfer means for transferring the granular material group as the inspection object so as to pass through the detection part, an illumination means for illuminating the detection part, and the like. A light receiving unit; and a determination unit that determines whether the received light amount of the light receiving unit is normal or abnormal depending on whether the amount of light received from the light receiving unit is out of an appropriate light amount range corresponding to a normal object. An illumination light source; and a diffusion transmission member that transmits light emitted from the illumination light source toward the detection location as diffused light, and the diffusion transmission member is disposed on the outer side away from the detection location. A portion that is located on a lateral side of a portion including the detection portion of a moving drop path in which the inspection object moves and drops, and is provided in a state of being formed into a convex curved surface that curves in a convex manner toward the light receiving Intersects the light receiving direction of the means A reflective member that generates reflected light toward the detection location is provided at a location located on the lateral side of the diffuse transmission member in a direction in which the illumination light source is located on the outer side of the diffusion transmission member. A plurality of light emitting units are arranged in a state along the convex curved surface and arranged in a moving direction of the inspection target in the part of the moving drop path, and the inspection target of the plurality of light emitting units The upper-side light emitting unit and the lower-side light emission of the plurality of light-emitting units are set as the irradiation range of the upper-side light emitting unit located on the upper side in the moving direction and the lower-side light emitting unit located on the lower side in the moving direction of the inspection object. This is in the point set narrower than the irradiation range of the middle light emitting portion located between the two.
 本構成によれば、本第5発明の特徴構成と同様に、照明手段における拡散透過部材が検出箇所から離れる外方側に向けて凸状に湾曲する凸状曲面に形成する状態で備えられ、照明用光源が拡散透過部材よりも外方側の箇所に拡散透過部材における凸状曲面に沿って位置する状態で備えられることから、検出箇所に位置する検査対象物に対して、受光手段に導かれる光通過経路に略沿う方向の光だけでなく、その光通過経路に略沿う方向に対して略直交する方向の光等、凸状曲面に沿って互いに位置が異なる箇所から光を照射させることが可能となるので、検出箇所に位置する検査対象物に対して、広い範囲にわたり均等に拡散された光を照射することができる。 According to this configuration, similarly to the characteristic configuration of the fifth invention, the diffusing and transmitting member in the illumination means is provided in a state of forming a convex curved surface that curves convexly toward the outer side away from the detection location, Since the illumination light source is provided at a location on the outer side of the diffuse transmission member along the convex curved surface of the diffusion transmission member, the light source is guided to the inspection object located at the detection location. Irradiate light from locations that are different from each other along a convex curved surface, such as light in a direction substantially perpendicular to the direction along the light passage path, as well as light in a direction substantially along the light passage path. Therefore, it is possible to irradiate light that is uniformly diffused over a wide range with respect to the inspection object positioned at the detection location.
 また、本特徴構成によれば、第5特徴構成と同様に、検出箇所から横外側に漏れ出ようとする光が、反射部材によって検出箇所に向けて反射し、検査対象物のうちの横側部であって、照明手段からの光が当りにくいと共に受光部に向かわず、暗くなった状態で受光部に写り込み易い横側部を照明することになり、照明用光源から検出箇所に出射され、検出箇所から横外側に漏れ出ようとする光を、暗く写り込み易い検査対象物の横側部の照明に無駄なく使用できる。 Further, according to this feature configuration, similarly to the fifth feature configuration, the light that leaks from the detection location to the laterally outer side is reflected by the reflecting member toward the detection location, and the lateral side of the inspection object It is a part that illuminates the side part that is difficult to receive light from the illumination means and is not directed to the light receiving part, and is easily reflected in the light receiving part in a dark state, and is emitted from the light source for illumination to the detection point. The light that is about to leak laterally outward from the detection location can be used for illumination of the lateral side portion of the inspection object that is dark and easily reflected.
 また、第6特徴構成と同様に、出射する光が検査対象物の上端部に当たる上手側発光部、及び出射する光が検査対象物の下端部に当たる下手側発光部の照射範囲を、出射する光が検査対象物の中間部に当たる中発行部の照射範囲より狭く設定してあるから、上手側発光部及び下手側発光部は、中発行部よりも集中した強い光を検査対象物の上端部や下端部に向けて出射することになり、検査対象物の上端部及び下端部から受光手段に向かう反射光と、検査対象物の中間部から受光手段に向かう反射光との強さの差が無いとかあまり無いことになり、正常物の検査対象物であるにもかかわらず、上端部や下端部が暗くなった状態で受光手段に写ることを防止でき、かつ、検査対象物におけるハレーションの発生を回避できる。 Further, similarly to the sixth feature configuration, the light emitted from the irradiation range of the upper-side light emitting portion where the emitted light hits the upper end portion of the inspection object and the lower-side light emitting portion where the emitted light hits the lower end portion of the inspection object Is set to be narrower than the irradiation range of the middle issuer which hits the middle part of the inspection object, the upper light emitting part and the lower light emitting part emit more concentrated light than the middle issue part and the upper end part of the inspection object. There is no difference in intensity between the reflected light from the upper end and the lower end of the inspection object toward the light receiving means and the reflected light from the intermediate part of the inspection object toward the light receiving means. Although it is a normal inspection object, it can be prevented from being reflected on the light receiving means in the state where the upper end and the lower end are dark, and the occurrence of halation in the inspection object can be prevented. Can be avoided.
 このように広い範囲にわたり略均等に拡散された光を照射することにより、例えば、透明のペレット等の透明な検査対象物を対象とするものであっても、検出箇所に位置する検査対象物に対して照射手段にて照明される光が、検査対象物の外周部の広い範囲にわたって略均等に拡散された状態となるので、かつ、暗く写り込み易い検査対象物の上端部及び下端部の照明を効果的にできるので、かつ暗く写り込み易い検査対象物の横側部を照明できるので、さらに、暗く写り込み易い検査対象物の上端部及び下端部の照明を効果的にできると共に中間部におけるハレーションを回避できるので、全ての領域で同じ透明度を有する正常な検査対象物(樹脂ペレット)であれば、受光手段にて受光される受光情報として、光の強さが大きい特に明るい部分や光の強さが小さい影の部分等が生じるおそれがなく誤判別のおそれが少ないものになる。 By irradiating light that is diffused substantially uniformly over such a wide range, for example, even for a transparent inspection object such as a transparent pellet, the inspection object positioned at the detection location On the other hand, the light illuminated by the irradiating means is in a state of being diffused substantially evenly over a wide range of the outer peripheral portion of the inspection object, and the illumination of the upper and lower ends of the inspection object that is dark and easily reflected Can effectively illuminate the lateral side of the inspection object that is dark and easy to be reflected, so that it is possible to effectively illuminate the upper and lower ends of the inspection object that is easily dark and visible in the middle part. Since halation can be avoided, a normal inspection object (resin pellet) having the same transparency in all areas has a particularly high light intensity as light reception information received by the light receiving means. Fear have parts or of the light intensity is small shaded area or the like is generated there is no fear of erroneous determination becomes what is small.
 従って、透明な粒状体群を検出対象物とするような場合であっても、正常物であるか異常物であるかの判別を良好に行うことが可能な高品質の粒状体検査装置を得ることができる。 Therefore, even when a transparent granular material group is used as a detection target, a high-quality granularity inspection apparatus capable of determining whether it is normal or abnormal is obtained. be able to.
 上記構成において、前記照明手段、前記拡散透過部材、及び前記移動落下経路の部位を収納する収納ケースを備え、前記反射部材を、前記収納ケースにおける側部カバーと前記移動落下経路の部位との間に配備すれば好適である。 In the above configuration, the illumination unit, the diffusing and transmitting member, and a storage case that stores a portion of the moving drop path are provided, and the reflection member is disposed between a side cover in the storage case and the portion of the moving drop path. It is suitable if it is deployed in.
 本構成によると、反射部材が収納ケースにおける側部カバーよりも検出箇所に寄った箇所に位置することになり、検出箇所から横側に漏れ出ようとする光が検出箇所に近い箇所で検出箇所に向けて反射する。すなわち、反射光による検査対象物における横側部の照明を効果的に行なわせることができる。 According to this configuration, the reflecting member is located at a location closer to the detection location than the side cover in the storage case, and light that leaks from the detection location to the lateral side is detected at a location near the detection location. Reflect towards That is, it is possible to effectively perform illumination of the lateral side portion of the inspection object by the reflected light.
 従って、反射光を検査対象物における横側部の効果的な照明に利用して、検査対象物の受光部に対する写り込みを良好にできる。 Therefore, the reflected light can be used for effective illumination of the lateral side portion of the inspection object, and the reflection of the inspection object on the light receiving portion can be improved.
 上記構成において、前記検出箇所の下方に、前記検出箇所からの検査対象物を正常物と異常物とに分離させ、分離した異常物又は正常物を飛ばす分離手段を設け、前記分離手段の上方に、前記検出箇所に向かう反射光を発生させる下第1反射部材を設けると好適である。 In the above configuration, a separating means for separating the inspection object from the detection position into a normal object and an abnormal object and flying the separated abnormal object or normal object is provided below the detection area, and above the separating means. It is preferable to provide a lower first reflecting member that generates reflected light toward the detection location.
 本構成によると、検出箇所から下方に抜け出ようとする光を、分離手段に当たって乱反射したり不適切な方向に反射したりしないように、分離手段の上方箇所で下第1反射部材によって検出箇所に向けて反射させて検査対象物の照明に利用できる。 According to this configuration, the light that attempts to escape downward from the detection location is not reflected by the separation means and is not reflected in an inappropriate direction, so that the light is reflected by the lower first reflection member at the location above the separation means. It can be used to illuminate the object to be inspected.
 従って、検出箇所から下方に漏れ出ようとする光を検査対象物の照明に無駄なく使用して、検査対象物の受光手段に対する写り込みを良好にできる。 Therefore, the light that leaks downward from the detection point can be used for illumination of the inspection object without waste, and the reflection of the inspection object on the light receiving means can be improved.
 上記構成において、前記検出箇所の下方に、前記分離手段によって飛ばされた異常物又は正常物を回収部に落下するよう案内する案内体を設け、前記案内体の上方に、前記検出箇所に向かう反射光を発生させる下第2反射部材を設けると好適である。 In the above-described configuration, a guide body is provided below the detection location to guide the abnormal or normal material that has been blown off by the separating means so as to drop to the recovery unit, and the reflection toward the detection location is provided above the guide body. It is preferable to provide a lower second reflecting member that generates light.
 本構成によると、検出箇所から下方に抜け出ようとする光を、案内体に当たって乱反射したり不適切な方向に反射したりしないように、案内体の上方箇所で下第2反射部材によって検出箇所に向けて反射させて検査対象物の照明に利用できる。 According to this configuration, the light that attempts to escape downward from the detection location is not reflected by the guide body and is not reflected in an inappropriate direction. It can be used to illuminate the object to be inspected.
 従って、本発明によると、検出箇所から下方に漏れ出ようとする光を検査対象物の照明に無駄なく使用して、検査対象物の受光手段に対する写り込みを良好にできる。 Therefore, according to the present invention, the light that leaks downward from the detection point can be used for illumination of the inspection object without waste, and the reflection of the inspection object on the light receiving means can be improved.
第1実施形態の全体側面図である。It is a whole side view of a 1st embodiment. 光学式計測部の縦断側面図である。It is a vertical side view of an optical measurement part. 光学式計測部の平面図である。It is a top view of an optical measurement part. 光学式計測部の斜視図である。It is a perspective view of an optical measurement part. 受光手段と照明手段の配置状態を示す斜視図である。It is a perspective view which shows the arrangement | positioning state of a light-receiving means and an illumination means. 前部側受光部における計測状態を示す平面図である。It is a top view which shows the measurement state in a front side light-receiving part. 受光手段の受光状態を示す図である。It is a figure which shows the light reception state of a light-receiving means. 受光手段の出力電圧を示す図である。It is a figure which shows the output voltage of a light-receiving means. 制御ブロック図である。It is a control block diagram. 別実施形態の光学式計測部の縦断側面図である。It is a vertical side view of the optical measurement part of another embodiment. 別実施形態の照明用光源の斜視図である。It is a perspective view of the light source for illumination of another embodiment. 別実施形態の照明用光源の斜視図である。It is a perspective view of the light source for illumination of another embodiment. 第2実施形態の全体側面図である。It is a whole side view of 2nd Embodiment. 光学式計測部の縦断側面図である。It is a vertical side view of an optical measurement part. 光学式計測部の平面図である。It is a top view of an optical measurement part. 光学式計測部の斜視図である。It is a perspective view of an optical measurement part. 受光手段と照明手段の配置状態を示す斜視図である。It is a perspective view which shows the arrangement | positioning state of a light-receiving means and an illumination means. レンズフード手段及び光透過体を示す縦断側面図である。It is a vertical side view which shows a lens hood means and a light transmissive body. 別実施形態の光透過体を示す縦断側面図である。It is a vertical side view which shows the light transmission body of another embodiment. 別実施形態の光学式計測部の縦断側面図である。It is a vertical side view of the optical measurement part of another embodiment.
〔第1実施形態〕
 以下、本発明に係る粒状体検査装置の第1実施形態を、多数の樹脂ペレットを検査対象物として移送しながら、正常物であるか異常物であるかの判別処理とそれらの分離処理を行う場合について図面に基づいて説明する。
[First Embodiment]
Hereinafter, the first embodiment of the granular material inspection apparatus according to the present invention performs a determination process as to whether it is normal or abnormal and a separation process thereof while transferring a large number of resin pellets as inspection objects. The case will be described with reference to the drawings.
 図1に示すように、検出箇所Jを通過させるようにペレット群kを一層で且つ幅広状態で流下案内する傾斜姿勢のシュータ1が備えられ、このシュータ1の上部側に設けた貯留ホッパー2から振動フィーダ3によって搬送されて供給されたペレット群kをシュータ1の上面を流下させながら、正常物と異常物とを選別してそれらを分離することができるように構成されている。 As shown in FIG. 1, there is provided a shooter 1 having an inclined posture for guiding the pellet group k to flow down in a single layer and in a wide state so as to pass the detection point J, and from a storage hopper 2 provided on the upper side of the shooter 1. While the pellet group k conveyed and supplied by the vibration feeder 3 is caused to flow down the upper surface of the shooter 1, the normal product and the abnormal product can be selected and separated from each other.
 以下、各部の構成について説明する。
 図1に示すように、外部からペレット群kが供給されて貯留される貯留ホッパー2は、側面視で下端側ほど先細の筒状に形成され、振動フィーダ3は、貯留ホッパー2の下部から排出されるペレット群kを受止める受止め載置部4と、その受止め載置部4に振動を与える振動発生器5とを備えて、振動発生器5にて受止め載置部4に振動を与えて、その一端部からペレット群kを繰出して、シュータ1の幅方向全幅に亘って広がる一層状態で流下するようにペレット群kをシュータ1上に繰出すように構成されている。このシュータ1は、図4に示すように、幅方向全幅に亘って平坦な案内面に形成された平面シュータにて構成されている。この場合、一層状態で流下させることを目的としているので、流れ状態により部分的に粒が重なって二層状態等になっても、一層状態の概念に含まれる。
Hereinafter, the configuration of each unit will be described.
As shown in FIG. 1, the storage hopper 2 that is supplied and stored with the pellet group k from the outside is formed in a tapered shape toward the lower end in a side view, and the vibration feeder 3 is discharged from the lower part of the storage hopper 2. The receiving placement unit 4 that receives the pellet group k to be received and the vibration generator 5 that applies vibration to the receiving placement unit 4 are provided. The vibration generator 5 vibrates the receiving placement unit 4. The pellet group k is fed out from one end thereof, and the pellet group k is fed out onto the shooter 1 so as to flow down in a single layer extending over the entire width of the shooter 1. As shown in FIG. 4, the shooter 1 is a flat shooter formed on a flat guide surface over the entire width in the width direction. In this case, since it is intended to flow down in a single layer state, even if grains partially overlap with each other due to the flow state, a two-layer state is included in the concept of a single layer state.
 図1に示すように、ペレット群kがシュータ1により流下案内される移動落下経路IK中にペレット群kに対する検出箇所Jが設定されており、シュータ1により流下案内されて検出箇所Jを通過した正常なペレット群kは下方側の正常物回収部6にそのまま落下して回収され、異常物は後述するエアー吹き付け装置7による吹き付け作用により経路を異ならせて別途回収されるように構成されている。 As shown in FIG. 1, a detection point J for the pellet group k is set in a moving and dropping route IK in which the pellet group k is guided by the shooter 1, and the detection point J is guided by the shooter 1 and passed through the detection point J. The normal pellet group k is dropped and recovered as it is in the lower normal collection unit 6, and the abnormal product is separately collected by changing the path by a blowing action by an air blowing device 7 to be described later. .
 従って、貯留ホッパー2、振動フィーダ3、及び、シュータ1等により、ペレット群kを一層状態で且つ横幅方向に広がった状態で移動落下経路IKに沿って移送するとともに、移動落下経路IKの途中に横幅方向に沿って延びる状態で設けられた検出箇所を通過させる移送手段Sが構成されている。 Therefore, the storage hopper 2, the vibration feeder 3, the shooter 1, and the like transfer the pellet group k along the moving drop path IK in a state where the pellet group k is spread in the horizontal width direction and in the middle of the moving drop path IK. The transfer means S which passes the detection location provided in the state extended along a horizontal width direction is comprised.
 又、振動フィーダ3は、振動発生器5の振動によるペレット群kの搬送速度を変化させることにより、シュータ1に繰出されるペレット群kの供給量、つまり、シュータ1によるペレット群kの移送流量を変更調節することが可能に構成されている。 Further, the vibration feeder 3 changes the conveying speed of the pellet group k due to the vibration of the vibration generator 5, thereby supplying the pellet group k fed to the shooter 1, that is, the transfer flow rate of the pellet group k by the shooter 1. It is configured to be able to change and adjust.
 そして、前記検出箇所Jに対応する位置に光学式計測部8が備えられている。この光学式計測部8は、図1~図5に示すように、検出箇所Jを照明する照明手段9と、検出箇所Jからの光を受光する受光手段10と、検出箇所Jよりもペレット群kの移送方向下手側の分離箇所において分離対象粒(異常物)と他の正常なペレット群k(正常物)とを分離させる分離手段としてのエアー吹き付け装置7等を備えて構成され、それらを収納ケース11の内部に収納する状態でユニット状に構成されている。 And, an optical measuring unit 8 is provided at a position corresponding to the detection point J. As shown in FIGS. 1 to 5, the optical measuring unit 8 includes an illuminating means 9 for illuminating the detection location J, a light receiving means 10 for receiving light from the detection location J, and a pellet group than the detection location J. k is provided with an air blowing device 7 or the like as a separating means for separating a separation target particle (abnormal material) from another normal pellet group k (normal material) at a separation point on the lower side in the transfer direction of k. The unit is configured to be stored in the storage case 11.
 次に、受光手段10の構成について説明する。
 受光手段10は、ペレット群kの移送方向視あるいは装置側面視において検出箇所Jに対して一方側としての装置前部側に位置して、検出箇所Jからの光を受光する一方側受光手段としての前部側の受光部12(以下、前部側受光部12と称する)と、ペレット群kの移送方向視あるいは装置側面視において検出箇所Jに対して他方側としての装置後部側に位置して、検出箇所Jからの光を受光する他方側受光手段としての後部側の受光部13(以下、後部側受光部13と称する)とを備えて構成されている。
Next, the configuration of the light receiving means 10 will be described.
The light receiving means 10 is positioned on the front side of the apparatus as one side with respect to the detection position J in the transfer direction view of the pellet group k or in the apparatus side view, and serves as one side light reception means for receiving light from the detection position J. The front side light receiving unit 12 (hereinafter referred to as the front side light receiving unit 12) and the device rear side as the other side of the detection point J in the transfer direction view of the pellet group k or the device side view. The rear side light receiving unit 13 (hereinafter, referred to as the rear side light receiving unit 13) is configured as the other side light receiving unit that receives the light from the detection point J.
 前部側受光部12は検出箇所Jから装置前部側外方に向かう光を受光し、後部側受光部13は検出箇所Jから装置後部側外方に向かう光を受光するものであって、これらの前後両側の受光部12,13を備えることで、ペレット群kの前後両側部における異常を適正に検出することができる構成となっている。 The front side light receiving unit 12 receives light traveling outward from the detection point J toward the front side of the apparatus, and the rear side light receiving unit 13 receives light traveling outward from the detection point J toward the rear side of the apparatus, By providing the light receiving portions 12 and 13 on both the front and rear sides, it is possible to appropriately detect an abnormality in the front and rear side portions of the pellet group k.
 そして、図3、図5及び図6に示すように、前部側受光部12は装置横幅方向に沿って並ぶ状態で配備された2台の前部側受光装置14A,14Bを備えて構成され、後部側受光部13も前部側受光部12と同様に、装置横幅方向に沿って並ぶ状態で配備された2台の後部側受光装置15A,15Bを備えて構成されている。 As shown in FIGS. 3, 5, and 6, the front-side light receiving unit 12 includes two front-side light receiving devices 14 </ b> A and 14 </ b> B that are arranged in a state of being aligned along the horizontal direction of the device. Similarly to the front side light receiving unit 12, the rear side light receiving unit 13 is also configured to include two rear side light receiving devices 15A and 15B arranged in a state of being aligned along the horizontal direction of the device.
 図7に示すように、前記各受光装置14A,14B、15A,15Bは、検出箇所Jからの光を受光する複数個の単位受光部tを装置横幅方向に沿って並置させる状態で備えて、ペレットkの大きさよりも小さい範囲を単位受光対象範囲とする分解能状態で光を受光するように構成されている。
 つまり、各受光装置14A,14B、15A,15Bは、夫々、ペレットkの大きさよりも小さい範囲p(例えばペレットの大きさの10分の1よりも小さい範囲)を夫々の受光対象範囲としており、図6に示すように、それら複数の受光対象範囲に対応する受光対象範囲である複数個の単位受光部tを幅広の検出箇所Jに対応させてライン状に並ぶ状態で並置されたCCDセンサ部16と、装置横幅方向に視野角を有する状態で受光した光を複数の単位受光部tに導く集光レンズ17とを備えて構成されている。
As shown in FIG. 7, each of the light receiving devices 14A, 14B, 15A, and 15B includes a plurality of unit light receiving portions t that receive light from the detection point J in a state of being juxtaposed along the device lateral width direction. It is configured to receive light in a resolution state in which a range smaller than the size of the pellet k is a unit light receiving target range.
That is, each of the light receiving devices 14A, 14B, 15A, and 15B has a range p smaller than the size of the pellet k (for example, a range smaller than 1/10 of the size of the pellet) as the respective light receiving target range. As shown in FIG. 6, a plurality of unit light-receiving portions t, which are light-receiving target ranges corresponding to the plurality of light-receiving target ranges, are juxtaposed in a line-like manner in correspondence with a wide detection point J. 16 and a condensing lens 17 that guides light received in a state having a viewing angle in the lateral direction of the apparatus to a plurality of unit light receiving portions t.
 図6に示すように、前部側受光部12における2台の前部側受光装置14A,14Bは、夫々、検出箇所Jの装置横幅方向の全幅のうちの右側半分と左側半分を夫々対象として検出箇所Jに位置するペレット群kの像をCCDセンサ部16の各単位受光部t上に結像させる状態で設けられ、各単位受光部tから各受光情報が順次取り出されるように構成されている。 As shown in FIG. 6, the two front-side light receiving devices 14A and 14B in the front-side light receiving unit 12 respectively target the right half and the left half of the entire width of the detection location J in the device lateral width direction. An image of the pellet group k located at the detection point J is provided in a state of being formed on each unit light receiving unit t of the CCD sensor unit 16, and each light receiving information is sequentially extracted from each unit light receiving unit t. Yes.
 尚、図6に示すように、2台の前部側受光装置14A,14Bによる検出対象領域Uは、中央部付近にて重複する状態で設けられ、検出箇所Jの装置横幅方向での全ての領域において光の計測情報が得られるようにしてあり、検出漏れが生じないようにしている。但し、重複して計測する箇所の受光データとしては、左右の前側受光装置14A,14Bのうちのいずれか一方の受光データだけを利用することになる。 As shown in FIG. 6, the detection target areas U by the two front-side light receiving devices 14A and 14B are provided so as to overlap in the vicinity of the central portion, and all the detection locations J in the device lateral width direction are provided. Light measurement information is obtained in the region, so that no detection omission occurs. However, only the light reception data of either one of the left and right front light receiving devices 14A and 14B is used as the light reception data of the portion to be measured redundantly.
 後部側受光部13は、光の検出方向が前後で逆向きになるだけであり、前部側受光部12と同様な構成を備えるものであるから説明は省略する。又、このような受光手段10の検出情報に基づく判別処理については後で説明する。 The rear side light receiving unit 13 is merely reverse in the light detection direction, and has the same configuration as that of the front side light receiving unit 12, and therefore description thereof is omitted. Further, such discrimination processing based on the detection information of the light receiving means 10 will be described later.
 図2に示すように、検出箇所Jから光が前部側受光装置14A,14Bに導かれる光の光軸CL1、及び、検出箇所Jから光が後部側受光装置15A,15Bに導かれる光の光軸CL2は、夫々、ペレット群kの移送方向と直交する方向ではなく、移送方向と直交する方向よりもペレット移送方向上手側に傾斜する状態で設定され、前部側受光装置14A,14Bと後部側受光装置15A,15Bとが同じ検出箇所Jからの光を同時に検出することができるように構成されている。 As shown in FIG. 2, the optical axis CL1 of light guided from the detection point J to the front light receiving devices 14A and 14B, and the light guided from the detection point J to the rear light receiving devices 15A and 15B. The optical axis CL2 is set not in a direction orthogonal to the transfer direction of the pellet group k, but in a state of being inclined toward the upper side of the pellet transfer direction from the direction orthogonal to the transfer direction, and the front side light receiving devices 14A and 14B The rear side light receiving devices 15A and 15B are configured to be able to simultaneously detect light from the same detection location J.
 次に、照明手段9について説明する。
 図1、図2及び図5に示すように、照明手段9は、ペレット群kの移送方向視あるいは装置側面視において検出箇所Jに対して一方側としての装置前部側に位置して検出箇所Jを照明する一方側の照明手段としての前部側照明部18と、ペレット群kの移送方向視あるいは装置側面視において検出箇所Jに対して他方側としての装置後部側に位置して検出箇所Jを照明する他方側の照明手段としての後部側照明部19とを備えて構成されている。
Next, the illumination means 9 will be described.
As shown in FIGS. 1, 2, and 5, the illuminating means 9 is located on the front side of the apparatus as one side with respect to the detection position J in the transfer direction view of the pellet group k or in the side view of the apparatus. A front side illumination unit 18 as one side illumination means for illuminating J, and a detection point located on the rear side of the apparatus as the other side with respect to the detection point J in the transfer direction view of the pellet group k or the device side view The rear side illumination part 19 as an illumination means of the other side which illuminates J is comprised.
 前部側照明部18は、検出箇所Jに向けて出射させる照明用光源20と、その照明用光源20から検出箇所Jに向けて出射された光を拡散光として透過させる拡散透過部材21とを備えて構成されている。
 説明を加えると、図2及び図5に示すように、拡散透過部材21は、検出箇所Jから一方側外方としての装置前部側外方に向けて凸状に湾曲する凸状曲面Qを有し且つ横幅方向に向かって延びる略半円筒状に構成されている。この拡散透過部材21は、板面の一方側の外方から入射してくる光を拡散光にして透過させる一般的な光拡散用部材からなる板状部材を半円筒形状になるように湾曲形成することにより構成されている。
The front-side illumination unit 18 includes an illumination light source 20 that emits toward the detection location J, and a diffuse transmission member 21 that transmits light emitted from the illumination light source 20 toward the detection location J as diffused light. It is prepared for.
In addition, as shown in FIGS. 2 and 5, the diffuse transmission member 21 has a convex curved surface Q that curves from the detection point J toward the outside of the front side of the apparatus as one side outward. It has a substantially semi-cylindrical shape that extends in the width direction. The diffuse transmission member 21 is formed by bending a plate-shaped member made of a general light diffusion member that transmits light incident from the outside of one side of the plate as diffused light so as to have a semi-cylindrical shape. It is comprised by doing.
 そして、照明用光源20は、拡散透過部材21における凸状曲面Qに沿って並ぶ状態で複数の発光部としての複数のライン状照明装置23を備えて構成されている。具体的には、図2及び図5に示すように、検出箇所Jの装置横幅方向に沿う幅と同じ又は略同じ幅を備える状態で装置横幅方向に複数の長尺のライン状照明装置23を凸状曲面Qに沿って並ぶ状態で備えて構成されている。 The illumination light source 20 is configured to include a plurality of line illumination devices 23 as a plurality of light emitting units in a state of being aligned along the convex curved surface Q of the diffuse transmission member 21. Specifically, as shown in FIGS. 2 and 5, a plurality of long line illumination devices 23 are provided in the apparatus width direction in a state having the same or substantially the same width as the width of the detection location J along the apparatus width direction. It is provided with being arranged along the convex curved surface Q.
 具体的には、前部側照明部18における複数のライン状照明装置23は、検出箇所Jから光が前部側受光装置14A,14Bに導かれる光の光軸CL1に対して上下方向に振り分けた状態で配備され、各ライン状照明装置23は、夫々、検出箇所Jに向けて光を出射させるように取り付けられている。拡散透過部材21は、検出箇所Jから一方側外方としての装置前部側外方に向けて凸状に湾曲する凸状曲面Qを有し且つ横幅方向に向かって延びる略半円筒状に構成されている。尚、拡散透過部材21の幅方向中央部には、検出箇所Jからの光を前部側受光装置14A,14Bに導くための光通過孔70が形成されている。 Specifically, the plurality of line-like illuminating devices 23 in the front side illuminating unit 18 distributes light vertically from the detection point J to the optical axis CL1 of the light guided to the front side light receiving devices 14A and 14B. Each line illumination device 23 is attached so as to emit light toward the detection portion J. The diffuse transmission member 21 has a convex curved surface Q that curves in a convex shape from the detection point J toward the outside of the front side of the apparatus as one side outward, and has a substantially semi-cylindrical shape that extends in the lateral width direction. Has been. A light passage hole 70 for guiding the light from the detection point J to the front side light receiving devices 14A and 14B is formed at the center in the width direction of the diffuse transmission member 21.
 説明を加えると、前記光軸CL1に近接する状態で光軸CL1に対して上下方向に略均等に振り分け配置されて、ペレット群kの移送方向と略直交する方向に向けて光を出射させる一対の水平光発光用のライン状照明装置23aと、前記光軸CL1から離れる状態で光軸CL1に対して上下方向に略均等に振り分け配置されて、ペレット群kの移送方向に略沿う方向に向けて光を出射させる一対の垂直光発光用のライン状照明装置23bとがあり、合計4個のライン状照明装置23a,23bが備えられる構成となっている。 In other words, a pair of light beams emitted in a direction substantially perpendicular to the transfer direction of the pellet group k is arranged and distributed substantially evenly in the vertical direction with respect to the optical axis CL1 in a state of being close to the optical axis CL1. The horizontal illuminating device 23a for horizontal light emission and the light illuminating device 23a are arranged substantially equally in the vertical direction with respect to the optical axis CL1 while being separated from the optical axis CL1, and directed in a direction substantially along the transfer direction of the pellet group k. And a pair of vertical light emitting line illumination devices 23b for emitting light, and a total of four line illumination devices 23a and 23b are provided.
 後部側照明部19は、光を出射する方向が装置の前後で異なるように配置状態が前後で逆になっているが、前部側照明部18と同じ構成である。すなわち、検出箇所Jに向けて出射させる照明用光源24と、その照明用光源24から検出箇所Jに向けて出射された光を拡散光として透過させる拡散透過部材25とを備えて構成されている。
 説明を加えると、拡散透過部材25は、検出箇所Jから他方側外方としての装置後部側外方に向けて凸状に湾曲する凸状曲面Qを有し且つ横幅方向に向かって延びる略半円筒状に構成されている。尚、拡散透過部材25の幅方向中央部には、検出箇所Jからの光を前部側受光装置14A,14Bに導くための光通過孔71が形成されている。
The rear side illumination unit 19 has the same configuration as the front side illumination unit 18 although the arrangement state is reversed between the front and the back so that the light emitting direction is different between the front and the rear of the apparatus. In other words, the illumination light source 24 is emitted toward the detection location J, and the diffusion transmission member 25 is configured to transmit the light emitted from the illumination light source 24 toward the detection location J as diffused light. .
In other words, the diffusing and transmitting member 25 has a convex curved surface Q that curves convexly from the detection point J toward the outer side of the rear side of the apparatus as the outer side of the other side, and extends substantially in the lateral width direction. It is configured in a cylindrical shape. A light passage hole 71 for guiding light from the detection point J to the front light receiving devices 14A and 14B is formed at the center in the width direction of the diffuse transmission member 25.
 そして、照明用光源24は、拡散透過部材25における凸状曲面Qに沿って並ぶ状態で複数の発光部として複数のライン状照明装置27を備えて構成されている。すなわち、検出箇所Jの横幅方向に沿う幅と同じ又は略同じ幅を備える状態で横幅方向に長尺のライン状照明装置27を凸状曲面Qに沿って並ぶ状態で備えて構成されている。 The illumination light source 24 is configured to include a plurality of line illumination devices 27 as a plurality of light emitting units in a state of being aligned along the convex curved surface Q of the diffusing and transmitting member 25. In other words, the linear illumination device 27 that is long in the horizontal width direction is arranged along the convex curved surface Q in a state having the same or substantially the same width as the width along the horizontal width direction of the detection location J.
 具体的には、光軸CL2に近接する状態で光軸CL2に対して上下方向に略均等に振り分け配置されて、ペレット群kの移送方向と略直交する方向に向けて光を出射させる一対の水平光発光用のライン状照明装置27aと、前記光軸CL2から離れる状態で光軸CL2に対して上下方向に略均等に振り分け配置されて、ペレット群kの移送方向に略沿う方向に向けて光を出射させる一対の垂直光発光用のライン状照明装置27bとがあり、合計4個のライン状照明装置27が備えられる構成となっている。 Specifically, a pair of light beams that are arranged substantially equally in the vertical direction with respect to the optical axis CL2 in a state of being close to the optical axis CL2 and emit light in a direction substantially orthogonal to the transfer direction of the pellet group k. A line illumination device 27a for horizontal light emission and the light illuminating device 27a that is separated from the optical axis CL2 and is arranged substantially evenly in the vertical direction with respect to the optical axis CL2, and in a direction substantially along the transfer direction of the pellet group k. There is a pair of vertical light emitting line illumination devices 27b that emit light, and a total of four line illumination devices 27 are provided.
 前部側照明部18及び後部側照明部19の夫々における各ライン状照明装置23,27は、詳述はしないが、白色LED発光素子を基板上に3列状態で横幅方向に長尺状に並べて備えるとともに、それら複数の白色LED発光素子から発せられる光を集光する集光部材や光を拡散させる拡散板等を備えて構成となっている。 The line illumination devices 23 and 27 in each of the front side illumination unit 18 and the rear side illumination unit 19 are not described in detail, but the white LED light emitting elements are elongated in the horizontal width direction in three rows on the substrate. In addition to being provided side by side, the light emitting device includes a light collecting member that collects light emitted from the plurality of white LED light emitting elements, a diffusion plate that diffuses light, and the like.
 そして、図9に示すように、前部側照明部18における4個のライン状照明装置23の夫々の光量、及び、後部側照明部19における4個のライン状照明装置27の夫々の光量を各別に変更調整自在な照明光量調整手段28が備えられている。
 この照明光量調整手段28は、前部側照明部18における4個のライン状照明装置23に対して各別に作用する4個の前部側用の照明光量調整回路29と、後部側照明部19における4個のライン状照明装置27に対して各別に作用する4個の後部側用の照明光量調整回路30とで構成される。
Then, as shown in FIG. 9, the respective light amounts of the four linear illumination devices 23 in the front side illumination unit 18 and the respective light amounts of the four linear illumination devices 27 in the rear side illumination unit 19 are obtained. Illumination light quantity adjustment means 28 that can be changed and adjusted individually is provided.
The illumination light amount adjusting means 28 includes four front-side illumination light amount adjustment circuits 29 that individually act on the four line illumination devices 23 in the front-side illumination unit 18, and the rear-side illumination unit 19. The four line-shaped illumination devices 27 in FIG. 4 are configured with four rear-side illumination light amount adjustment circuits 30 that act separately.
 このように、ペレット群kの移送方向と略直交する方向に向けて光を出射させる一対の水平光発光用のライン状照明装置23a,27aと、ペレット群kの移送方向に略沿う方向に向けて光を出射させる一対の垂直光発光用のライン状照明装置23b,27bとが備えられ、しかも、それらから出射された光を拡散光として透過させる半円筒状の拡散透過部材21,25を備えることから、検出箇所Jに位置するペレットに対して照明される光が、ペレットkの外周部の広い範囲にわたって略均等に拡散された状態となる。 As described above, the pair of horizontal light emitting line illumination devices 23a and 27a that emit light in a direction substantially orthogonal to the transfer direction of the pellet group k, and the direction substantially along the transfer direction of the pellet group k. And a pair of vertical illuminating line illuminators 23b and 27b for emitting light, and semi-cylindrical diffusing and transmitting members 21 and 25 for transmitting the light emitted therefrom as diffused light. Therefore, the light illuminated on the pellet located at the detection point J is in a state of being diffused substantially uniformly over a wide range of the outer peripheral portion of the pellet k.
 その結果、ペレットkが透明な材料で形成されるものであっても、異常な箇所が存在しない正常なペレットkであれば、光の強さが大きい特に明るい部分や光の強さが小さい影の部分等が生じるおそれが少ないものになる。 As a result, even if the pellet k is formed of a transparent material, if the pellet k is a normal pellet k that does not have an abnormal part, the light intensity is particularly large or the light intensity is small. This is less likely to occur.
 そして、詳細な取付け構造については詳述はしないが、前部側照明部18における合計4個のライン状照明装置23は、収納ケース11の横幅方向両側部に取り外し自在にビス止めされた取付け板31に亘って架設連結されており、収納ケース11における側部カバー11Aと横幅方向両側部の夫々の取付け板31を取り外すと、両側の取付け板31と4個のライン状照明装置23が一体的に支持された状態が外部に取り外すことが可能な構成となっている。このことにより、修理交換等のメンテナンス作業が行い易いものとなっている。 Although a detailed mounting structure will not be described in detail, a total of four line lighting devices 23 in the front side lighting unit 18 are detachably screwed mounting plates on both lateral sides of the storage case 11. 31. When the side cover 11A in the storage case 11 and the respective attachment plates 31 on both sides in the lateral width direction are removed, the attachment plates 31 on the both sides and the four line illumination devices 23 are integrated. The state that is supported by can be removed to the outside. This facilitates maintenance work such as repair and replacement.
 図2に示すように、前部側受光部12の受光方向における検出箇所Jの前部側受光部12とは反対側箇所から前部側受光部12に向けて光を投射する前部側の投射部材32が、前部側照明部18における下側の水平光発光用のライン状照明装置23aと下側の垂直光発光用のライン状照明装置23bとの間に位置する状態で備えられている。
 又、後部側受光部13の受光方向における検出箇所Jの後部側受光部13とは反対側箇所から後部側受光部に向けて光を投射する後部側の投射部材33が、後部側照明部19における下側に位置する水平光発光用のライン状照明装置27aと下側の垂直光発光用のライン状照明装置27bとの間に位置する状態で備えられている。
As shown in FIG. 2, the front side of the front side light receiving unit 12 projects light toward the front side light receiving unit 12 from the side opposite to the front side light receiving unit 12 of the detection point J in the light receiving direction. The projection member 32 is provided in a state of being positioned between the lower horizontal light emitting line illumination device 23 a and the lower vertical light emitting line illumination device 23 b in the front side illumination unit 18. Yes.
Further, the rear side projection member 33 that projects light toward the rear side light receiving unit from the side opposite to the rear side light receiving unit 13 in the light receiving direction of the rear side light receiving unit 13 is provided in the rear side lighting unit 19. Are arranged between a line illumination device 27a for horizontal light emission located on the lower side and a line illumination device 27b for light emission on the lower side.
 前部側の投射部材32及び後部側の投射部材33は、夫々、詳述はしないが、横幅方向に長尺に形成された基板上にLED発光素子を多数並べて配備するとともに、そのLED発光素子から発した光を拡散板にて拡散させた状態で検出箇所Jを通して前部側受光部12及び後部側受光部13に光を投射するように構成されている。
 図9に示すように、この前部側の投射部材32及び後部側の投射部材33は、背景光量調整手段としての背景光量調整装置34によってペレット群kのうちの正常物からの反射光と同一又は略同一の明るさの光を投射するようにその光量が調整されることになる。
The front-side projection member 32 and the rear-side projection member 33 are not described in detail, but a large number of LED light-emitting elements are arranged side by side on a long substrate in the width direction, and the LED light-emitting elements are arranged. In the state where the light emitted from the light is diffused by the diffusion plate, the light is projected to the front side light receiving unit 12 and the rear side light receiving unit 13 through the detection point J.
As shown in FIG. 9, the front-side projection member 32 and the rear-side projection member 33 are the same as the reflected light from the normal material in the pellet group k by the background light amount adjusting device 34 as the background light amount adjusting means. Alternatively, the amount of light is adjusted so as to project light having substantially the same brightness.
 つまり、受光手段10の受光方向における検出箇所Jの受光手段10とは反対側箇所から受光手段10に向けて光を投射する投射部材32,33が備えられ、この投射部材32,33の光量を変更調整自在な背景光量調整装置34が備えられている。この背景光量調整装置34は、前部側の投射部材32や後部側の投射部材33を構成するLED発光素子に供給する電流値を変更調整することにより、受光手段10に投射する光量を変更調整することが可能な構成となっている。 In other words, projection members 32 and 33 that project light toward the light receiving means 10 from a position opposite to the light receiving means 10 of the detection position J in the light receiving direction of the light receiving means 10 are provided. A background light amount adjustment device 34 that can be changed and adjusted is provided. This background light quantity adjusting device 34 changes and adjusts the light quantity projected to the light receiving means 10 by changing and adjusting the current value supplied to the LED light emitting elements constituting the front side projection member 32 and the rear side projection member 33. It is possible to do this.
 図2に示すように、収納ケース11の前後中央部には、シュータ1により流下案内されるペレット群kが通過するために上下方向に貫通するペレット通過用空間C1が形成され、そのペレット通過用空間C1の装置前部側には、前部側照明部18、前部側投射部材32を収納する前部側収納空間C2が形成され、ペレット通過用空間C1の装置後部側には、後部側照明部19、後部側投射部材33を収納する後部側収納空間C3が形成されている。 As shown in FIG. 2, a pellet passage space C <b> 1 penetrating in the vertical direction is formed in the front and rear central portion of the storage case 11 so that the pellet group k guided by the shooter 1 passes therethrough. A front side storage space C2 for storing the front side illumination unit 18 and the front side projection member 32 is formed on the front side of the device in the space C1, and a rear side is provided on the rear side of the device in the pellet passage space C1. A rear side storage space C3 for storing the illumination unit 19 and the rear side projection member 33 is formed.
 ペレット通過用空間C1と前部側収納空間C2との間には、収納ケース11に備えられた前部側の仕切り部35とそれに連なるように設けられたガラス製の光透過窓36が設けられ、ペレット通過用空間C1と後部側収納空間C3との間には、後部側の仕切り部37とそれに連なるように設けられたガラス製の光透過窓38が設けられている。このように前部側収納空間C2や後部側収納空間C3は、ペレット通過用空間C1と仕切られて塵埃等が侵入しないようにしている。 Between the pellet passage space C1 and the front-side storage space C2, a front-side partition portion 35 provided in the storage case 11 and a glass light transmission window 36 provided so as to be continuous therewith are provided. Between the pellet passage space C1 and the rear-side storage space C3, a rear-side partition portion 37 and a glass light transmission window 38 provided so as to be continuous therewith are provided. Thus, the front side storage space C2 and the rear side storage space C3 are partitioned from the pellet passage space C1 so that dust and the like do not enter.
 上述したように、検出箇所Jから光が前部側受光装置14A,14Bに導かれる光の光軸CL1、及び、検出箇所Jから光が後部側受光装置15A,15Bに導かれる光の光軸CL2は、夫々、ペレット群kの移送方向と直交する方向よりもペレット移送方向上手側に傾斜する状態で設定されているが、検出箇所Jからの光を効率よく検出するために、前後の光透過窓36,38は前記各光軸CL1,CL2の夫々と直交する状態で設けられることから、検出箇所Jがその内部に位置するペレット通過用空間C1は下方側ほど幅広となる下広がり状に形成されることになる。 As described above, the optical axis CL1 of the light from which the light is detected from the detection point J to the front side light receiving devices 14A and 14B, and the optical axis of the light from which the light is guided from the detection point J to the rear side light receiving devices 15A and 15B. CL2 is set so as to be inclined to the upper side of the pellet transfer direction from the direction orthogonal to the transfer direction of the pellet group k, but in order to efficiently detect the light from the detection point J, Since the transmission windows 36 and 38 are provided so as to be orthogonal to the respective optical axes CL1 and CL2, the pellet passage space C1 in which the detection point J is located is widened downward toward the lower side. Will be formed.
 前記検出箇所Jからペレット移送方向下手側に、検出箇所Jでの受光情報に基づいて判別された異常物(例えば、樹脂処理過程で焼けて着色したペレットや、色の違うペレット等)に対してエアーを吹き付けて正常なペレット群kの移動方向から分離させるためのエアー吹き付け装置7が設けられている。
 このエアー吹き付け装置7は、噴射ノズル7aの複数個を、検出箇所Jの横幅方向全幅を所定幅で複数個の区画に分割形成した各区画に対応する状態で並置させ、異常物が存在する区画の噴射ノズル7aが作動して異常物を吹き飛ばすように構成されている。
From the detection point J to the lower side of the pellet transfer direction, for abnormal substances (for example, pellets burned and colored in the resin treatment process, pellets of different colors, etc.) determined based on the light reception information at the detection point J An air blowing device 7 is provided for blowing air to separate the normal pellet group k from the moving direction.
This air spraying device 7 has a plurality of spray nozzles 7a juxtaposed in a state corresponding to each section formed by dividing the entire width of the detection location J into a plurality of sections with a predetermined width, and a section where abnormal objects are present. The spray nozzle 7a is activated to blow away abnormal objects.
 そして、図1に示すように、噴射ノズル7aからのエアーの吹き付けを受けずにそのまま進行してくる正常なペレットkを回収する正常物回収部6と、エアーの吹き付けを受けて正常なペレットkの流れから横方向に分離した異常物を回収する異常物回収部39とが設けられ、正常物回収部6が横幅方向に細長い筒状に形成され、エアーの吹き付けにより飛ばされたペレットkを回収するように、異常物回収部39が形成されている。 And as shown in FIG. 1, the normal thing collection | recovery part 6 which collects the normal pellet k which progresses as it is, without receiving the blowing of the air from the injection nozzle 7a, and the normal pellet k which receives the blowing of air And an abnormal material recovery unit 39 for recovering abnormal materials separated in the horizontal direction from the flow of the normal material, the normal material recovery unit 6 is formed in a long and narrow cylindrical shape in the horizontal width direction, and collects the pellets k that have been blown off by air blowing As described above, an abnormal object recovery unit 39 is formed.
 次に、粒状体検査装置の全体支持構造について説明する。
 図1に示すように、脚部40を備えた底部41、底部41から立設された前部縦枠42、後部縦43、左右両側部においてそれらを連結する斜め方向の横枠44,45等により機枠が構成され、振動フィーダ3に対する振動発生器5が左右両側の横枠44に亘って架設支持された略箱状の枠部47に支持され、底板41上には、エアー吹き付け装置7に対してエアーを供給するための図示しないエアー供給源からのエアーの圧力を調整するための調圧装置48等が設置されている。
Next, the whole support structure of a granular material inspection apparatus is demonstrated.
As shown in FIG. 1, a bottom 41 having legs 40, a front vertical frame 42 erected from the bottom 41, a rear vertical 43, diagonal horizontal frames 44, 45 connecting them at the left and right sides, etc. The machine frame is constructed, and the vibration generator 5 for the vibration feeder 3 is supported by a substantially box-shaped frame portion 47 that is installed and supported across the horizontal frames 44 on both the left and right sides. A pressure adjusting device 48 for adjusting the pressure of air from an air supply source (not shown) for supplying air is provided.
 又、光学式計測部8を収納する収納ケース11が左右両側の横枠45に亘って架設支持された箱状の支持台49に支持されている。又、シュータ1が上部側で枠部47に下部側
で収納ケース11に支持されている。前部の縦枠42の上部斜め部分を覆う前部カバー50に情報の表示及び入力用の操作パネル46が設置され、後部カバー51の内部には後述するような制御用の回路を備えた回路基板が備えられている。尚、図示はしないが、前部カバー50及び後部カバー51は左右方向に開閉自在に構成され、装置内部の点検等を行うことができるようになっている。
A storage case 11 for storing the optical measurement unit 8 is supported by a box-shaped support base 49 that is installed and supported across the horizontal frames 45 on both the left and right sides. The shooter 1 is supported by the frame 47 on the upper side and the storage case 11 on the lower side. An operation panel 46 for displaying and inputting information is installed on a front cover 50 covering an upper oblique portion of the front vertical frame 42, and a circuit provided with a control circuit as will be described later in the rear cover 51. A substrate is provided. Although not shown, the front cover 50 and the rear cover 51 are configured to be openable and closable in the left-right direction so that the inside of the apparatus can be inspected.
 次に制御構成について説明する。
 図9に示すように、マイクロコンピュータ利用の制御装置52が設けられ、この制御装置52に、2台の前部側受光装置14A,14B、及び、2台の後部側受光装置15A,15Bからの各受光信号と、操作パネル46からの操作情報とが入力されている。
 一方、制御装置52からは、操作パネル46に対する表示用の駆動信号と、4個の前部側用の照明光量調整回路29に対する駆動信号と、4個の後部側用の照明光量調整回路30に対する駆動信号と、各噴射ノズル7aへのエアー供給をオンオフする複数個の電磁弁53に対する駆動信号と、振動発生器5に対する駆動信号と、前部側の投射部材32及び後部側の投射部材33に対する駆動信号とが出力されている。
Next, the control configuration will be described.
As shown in FIG. 9, a control device 52 using a microcomputer is provided. The control device 52 includes two front light receiving devices 14A and 14B and two rear light receiving devices 15A and 15B. Each light reception signal and operation information from the operation panel 46 are input.
On the other hand, from the control device 52, a display drive signal for the operation panel 46, drive signals for the four front side illumination light amount adjustment circuits 29, and four rear side illumination light amount adjustment circuits 30. A drive signal, a drive signal for a plurality of solenoid valves 53 for turning on and off the air supply to each injection nozzle 7a, a drive signal for the vibration generator 5, and a projection member 32 on the front side and a projection member 33 on the rear side Drive signal is output.
 そして、制御装置52を利用して、前記各受光装置14A,14B、15A,15Bかの受光量を設定時間間隔でサンプリングして、そのサンプリングした受光量がペレット群kにおける正常物からの検出光に対する適正光量範囲ΔE1,ΔE2を外れているか否かの判別を行う判別手段100が構成されている。 Then, by using the control device 52, the received light amount of each of the light receiving devices 14A, 14B, 15A, 15B is sampled at a set time interval, and the sampled received light amount is detected light from a normal object in the pellet group k. A determination unit 100 is configured to determine whether or not the appropriate light amount range ΔE1, ΔE2 is out of the range.
 具体的には、この判別手段100は、前部側受光装置14A,14Bの各単位受光部tの受光量を所定時間間隔でサンプリングして、そのサンプリングした光量値が前面側の反射光について各単位受光部t毎に設定された適正光量範囲ΔE2を外れているか否かの判別を各単位受光部t毎に行うとともに、後部側受光装置15A,15Bの各単位受光部tの受光量を所定時間間隔でサンプリングして、そのサンプリングした光量値が後面側の反射光について各単位受光部t毎に設定された適正光量範囲ΔE1を外れているか否かの判別を各単位受光部t毎に行い、上記両判別においていずれかの単位受光部tの受光量が適正光量範囲ΔE1,ΔE2を外れている場合に異常物の存在を検出する。 Specifically, the discriminating means 100 samples the received light amount of each unit light receiving unit t of the front side light receiving devices 14A and 14B at a predetermined time interval, and the sampled light amount value corresponds to the reflected light on the front side. Whether or not the appropriate light amount range ΔE2 set for each unit light receiving unit t is deviated is determined for each unit light receiving unit t, and the amount of light received by each unit light receiving unit t of the rear side light receiving devices 15A and 15B is predetermined. Sampling is performed at time intervals, and it is determined for each unit light receiving unit t whether the sampled light amount value is outside the appropriate light amount range ΔE1 set for each unit light receiving unit t with respect to the reflected light on the rear surface side. In both the above determinations, the presence of an abnormal object is detected when the amount of light received by any one of the unit light receiving portions t is out of the appropriate light amount range ΔE1, ΔE2.
 上記異常物について説明すると、例えばペレットkの外周の一部の箇所に正常物と濃度が異なる異常箇所、具体的には、ペレットkの表面に樹脂処理の過程において生じた焼けによる黒色箇所やコンタミによる汚染箇所があるような場合に、その異常箇所からの反射光を受光した単位受光部tの受光量が、上記適正光量範囲ΔE1,ΔE2を外れて異常物の存在が検出される。 The above-mentioned abnormal material will be described. For example, an abnormal portion having a concentration different from that of a normal material in a part of the outer periphery of the pellet k, specifically, a black portion or a contamination due to burning generated in the resin treatment process on the surface of the pellet k. In the case where there is a contaminated portion, the amount of light received by the unit light receiving unit t that has received the reflected light from the abnormal portion deviates from the appropriate light amount range ΔE1, ΔE2, and the presence of an abnormal object is detected.
 異常物の信号について図8に例示する。尚、図8は、受光出力電圧の波形の一部を拡大したものであり、説明を判り易くするために、実際よりも異常が多く発生している状態が示されている。
 図8において、e0は、正常なペレットからの標準的な反射光に対する出力電圧レベルであり、受光素子5aの出力電圧が適正光量範囲ΔE1,ΔE2よりも小さい場合e1,e2では、正常なペレットよりも反射率が小さい異常のペレット(例えば、焼け部分)や異なる色の樹脂ペレット等の存在を判別し、適正光量範囲ΔE1,ΔE2よりも大きい場合e3では、正常なペレットkよりも反射率が大きい異なる色の樹脂ペレット(例えば、明度が大きい白色の樹脂ペレット)等の異物の存在を判別する。
An abnormal signal is illustrated in FIG. FIG. 8 is an enlarged view of a part of the waveform of the received light output voltage, and in order to make the explanation easier to understand, a state in which there are more abnormalities than actual is shown.
In FIG. 8, e0 is an output voltage level with respect to standard reflected light from a normal pellet. When the output voltage of the light receiving element 5a is smaller than the appropriate light amount range ΔE1, ΔE2, e1 and e2 are higher than normal pellets. Also, the presence of abnormal pellets with low reflectance (for example, burned portions), resin pellets of different colors, etc. are determined, and when e3 is larger than the appropriate light amount range ΔE1, ΔE2, e3 has a higher reflectance than normal pellet k. The presence of foreign matter such as resin pellets of different colors (for example, white resin pellets with high brightness) is determined.
 そして、制御装置52は、検出箇所Jを通過したペレット群kのうちで、異常物の存在が判別された場合には、検出箇所Jから噴射ノズル7aの噴射位置にペレット群kが搬送されるのに要する時間間隔が経過するに伴って、異常物に対してその位置に対応する区画の各噴射ノズル7aからエアーを吹き付けて正常なペレットkの経路から分離させる。 And when the presence of an abnormal thing is discriminated among the pellet groups k which passed the detection location J, the control apparatus 52 conveys the pellet group k from the detection location J to the injection position of the injection nozzle 7a. As the time interval required for this elapses, air is blown from the respective injection nozzles 7a in the section corresponding to the position of the abnormal object to separate it from the normal pellet k path.
 そして、この検査装置では、検査対象物としての多数のペレット群kについて選別処理を開始する前に、以下に説明するような種々の調整処理を実行することになる。 In this inspection apparatus, various adjustment processes as described below are executed before the selection process is started for a large number of pellet groups k as inspection objects.
 先ず、適正光量範囲ΔE1,ΔE2を設定して記憶する。
 すなわち、例えば、検査対象物としてのペレット群kについて、人為的な判断により予め異常であると判断された異常物を設定個数用意しておき、この異常物をシュータ1を流下させて全ての受光量の計測を順次行い、その受光量の計測結果に基づいて、異常であると判別すべき光量の設定閾値を定めて適正光量範囲ΔE1,ΔE2を定め、その適正光量範囲ΔE1,ΔE2を図示しないメモリに記憶させておき、検査対象物としての多数のペレット群kについて検出を実行するときには、この記憶している適正光量範囲ΔE1,ΔE2を用いて検出処理を実行する。
First, the appropriate light quantity ranges ΔE1, ΔE2 are set and stored.
That is, for example, with respect to the pellet group k as an inspection object, a set number of abnormal objects that have been determined to be abnormal in advance by human judgment are prepared, and the abnormal object is caused to flow down the shooter 1 to receive all light. The amount of light is sequentially measured, and based on the measurement result of the amount of received light, the appropriate light amount range ΔE1, ΔE2 is determined by setting the light intensity setting threshold to be determined as abnormal, and the appropriate light amount ranges ΔE1, ΔE2 are not illustrated. When it is stored in the memory and detection is performed for a large number of pellet groups k as inspection objects, detection processing is executed using the stored appropriate light amount ranges ΔE1 and ΔE2.
 又、多数のペレット群kについて選別処理を開始する前に、複数のライン状照明装置23,27に対して各別に作用する照明光量調整手段28による照明光量調整処理を行う。
 つまり、図2に示すように、検出箇所Jがその内部に位置するペレット通過用空間C1は下方側ほど幅広となる下広がり状に形成されるので、前部側照明部18における下側の水平光発光用のライン状照明装置23aと、上側の水平光発光用のライン状照明装置23aとは、検出箇所Jからの離間距離が互いに異なるものであり、同じ光量を出射させても、検出箇所Jを照射する光の光量は少しだけ異なることになる。上下両側の垂直光発光用のライン状照明装置23bについても同様である。そこで、作業者が、操作パネル46を用いて各ライン状照明装置23により検出箇所Jを照射する光の光量が同じになるように、各ライン状照明装置23の光量を変更調整するのである。
 後部側照明部19についても同様に、各ライン状照明装置27の光量を変更調整する。
In addition, before starting the sorting process for a large number of pellet groups k, the illumination light quantity adjustment process by the illumination light quantity adjusting means 28 acting on each of the plurality of line illumination devices 23 and 27 is performed.
That is, as shown in FIG. 2, the pellet passage space C <b> 1 in which the detection point J is located is formed so as to expand downward so that the lower side of the front side illumination unit 18 is horizontal. The line illumination device 23a for light emission and the line illumination device 23a for horizontal light emission on the upper side are different from each other in the distance from the detection point J. Even if the same amount of light is emitted, the detection point The amount of light that irradiates J is slightly different. The same applies to the line illumination devices 23b for vertical light emission on both the upper and lower sides. Therefore, the operator changes and adjusts the light amount of each linear illumination device 23 using the operation panel 46 so that the light amount of the light irradiating the detection location J by each linear illumination device 23 becomes the same.
Similarly, with respect to the rear side illumination unit 19, the light amount of each line illumination device 27 is changed and adjusted.
 多数のペレット群kについて選別処理を開始する前に、2台の前部側受光装置14A,14Bの個体差に起因した検出値の誤差が生じないように、すなわち、同一のペレットについて同じ検出値が得られるように、2台の前部側受光装置14A,14Bの検出値についての出力ゲイン調整処理を行う。2台の後部側受光装置15A,15Bの検出値についても同様に、検出値の誤差が生じないように出力ゲイン調整処理を行う。 Before starting the sorting process for a large number of pellet groups k, an error in detection values caused by individual differences between the two front light receiving devices 14A and 14B does not occur, that is, the same detection values for the same pellets. Thus, output gain adjustment processing is performed for the detection values of the two front light receiving devices 14A and 14B. Similarly, for the detection values of the two rear light-receiving devices 15A and 15B, output gain adjustment processing is performed so as not to cause an error in the detection values.
 さらに、多数のペレット群kについて選別処理を開始する前には、前部側の投射部材32及び後部側の投射部材33の光量を調整する背景光量調整処理を行う。つまり、作業者が、操作パネル46を用いて、前部側の投射部材32及び後部側の投射部材33の光量を、正常物に対応する光量になるように変更調整するのである。このように背景光量が正常物の光量と同等になることで、検出箇所Jにペレットkが存在しないときにも、受光手段10の受光量に基づいて異常物の存在を検出することがなく、エアー吹き出し装置7が不必要に作動して無駄な動作を実行することがない。 Furthermore, before starting the sorting process for a large number of pellet groups k, a background light quantity adjustment process for adjusting the light quantities of the front projection member 32 and the rear projection member 33 is performed. That is, the operator uses the operation panel 46 to change and adjust the light amounts of the front-side projection member 32 and the rear-side projection member 33 so as to correspond to the normal amount. Since the background light amount becomes equal to the light amount of the normal object in this way, even when the pellet k does not exist at the detection location J, the presence of an abnormal object is not detected based on the amount of light received by the light receiving means 10, The air blowing device 7 does not operate unnecessarily and performs a useless operation.
〔第1実施形態の別実施形態〕
(1)上記実施形態では、前記照明用光源20.24が、前記凸状曲面Qに沿って並ぶ状態で複数の発光部22,26として、夫々独立に形成されたライン状照明装置23,27を備えて構成されるものを示したが、この構成に代えて、例えば、図10及び図11に示すように、照明用光源20,24が、凸状曲面Qに沿うように略円弧状に一体的に形成された1つの照明装置60にて構成されるものでもよい。尚、この構成では、照明用光源20,24が凸状曲面Qに沿うように一体的に形成されるものであるから、その中央部には、検出箇所Jから受光手段10に向けて光を通過させるための光通過孔73,74が形成されることになる。
 又、図12に示すように、多角形状に一体的に形成された1つの照明装置61にて構成されるもの等でもよい。
[Another embodiment of the first embodiment]
(1) In the above embodiment, the line-shaped illumination devices 23 and 27 are formed independently as the plurality of light emitting units 22 and 26 in a state where the illumination light source 20.24 is arranged along the convex curved surface Q. However, instead of this configuration, for example, as shown in FIGS. 10 and 11, the illumination light sources 20 and 24 have a substantially arc shape along the convex curved surface Q. It may be configured by a single lighting device 60 formed integrally. In this configuration, since the illumination light sources 20 and 24 are integrally formed along the convex curved surface Q, light is directed toward the light receiving means 10 from the detection point J at the center. The light passage holes 73 and 74 for allowing the light to pass therethrough are formed.
Moreover, as shown in FIG. 12, what is comprised by the one illuminating device 61 integrally formed in polygonal shape etc. may be sufficient.
(2)上記実施形態では、前記照明用光源20,24がLED発光素子を備えて構成されるものを示したが、照明用光源としては、LED発光素子に限らず、蛍光灯等の他の種類の照明用のランプを用いることができる。 (2) In the above-described embodiment, the illumination light sources 20 and 24 are configured to include LED light emitting elements. However, the illumination light source is not limited to the LED light emitting elements, but may be other fluorescent lamps or the like. Various types of lighting lamps can be used.
(3)上記実施形態では、受光手段10に向けて光を投射する投射部材32,33が、LED発光素子を備えて構成されるものを示したが、投射部材としては、LED発光素子に限らず、所定の光反射率を備える反射板にて構成してもよい。 (3) In the said embodiment, although the projection members 32 and 33 which project light toward the light-receiving means 10 showed what comprised a LED light emitting element, as a projection member, it is restricted to a LED light emitting element. Instead, it may be configured by a reflector having a predetermined light reflectance.
(4)上記実施形態では、受光手段10として、装置横幅方向に沿って並ぶ状態で配備された2台の前部側受光装置14A,14B(15A,15B)を備える構成としたが、検出箇所の横幅方向全幅を1台の受光装置にて検出する構成としてもよい。 (4) In the above embodiment, the light receiving means 10 includes two front light receiving devices 14A and 14B (15A and 15B) arranged in a state of being aligned along the device width direction. It is good also as a structure which detects the full width direction of this with one light-receiving device.
〔第2実施形態〕
 以下、本発明に係る粒状体検査装置の第2実施形態を、多数の樹脂ペレットを検査対象物として移送しながら、正常物であるか異常物であるかの判別処理とそれらの分離処理を行う場合について図面に基づいて説明する。なお、上記第1実施形態との相違点を中心に説明し、第1実施形態と同様の点については、適宜、説明を省略する。
[Second Embodiment]
Hereinafter, the second embodiment of the granular material inspection apparatus according to the present invention performs a discrimination process as to whether it is normal or abnormal and a separation process thereof while transferring a large number of resin pellets as inspection objects. The case will be described with reference to the drawings. In addition, it demonstrates centering around difference with the said 1st Embodiment, and abbreviate | omits description suitably about the same point as 1st Embodiment.
 図13は、第2実施形態の全体側面図である。第2実施形態において、検出箇所Jを通過させるようにペレット群kを一層で且つ幅広状態で流下案内する傾斜姿勢のシュータ1が備えられ、このシュータ1の上部側に設けた貯留ホッパー2から振動フィーダ3によって搬送されて供給されたペレット群kをシュータ1の上面を流下させながら、正常物と異常物とを選別してそれらを分離することができるように構成されている。 FIG. 13 is an overall side view of the second embodiment. In the second embodiment, a shooter 1 having an inclined posture for flowing down and guiding the pellet group k in a single layer and in a wide state so as to pass the detection point J is provided, and vibration is generated from a storage hopper 2 provided on the upper side of the shooter 1. While the pellet group k transported and supplied by the feeder 3 is allowed to flow down the upper surface of the shooter 1, the normal product and the abnormal product can be selected and separated.
 図14に示すように、前部側受光部12に、2台の前部側受光装置14A,14Bのための前部側のレンズフード手段55を備えてある。すなわち、各前部側受光装置14A,14Bが検出箇所Jからの光以外の斜め方向の光を受光することをレンズフード手段55によって防止するように構成してある。 As shown in FIG. 14, the front-side light receiving unit 12 is provided with front-side lens hood means 55 for the two front-side light receiving devices 14A and 14B. That is, the lens hood means 55 prevents each front side light receiving device 14A, 14B from receiving light in an oblique direction other than the light from the detection point J.
 具体的には、図14,15,17に示すように、レンズフード手段55は、2台の前部側受光装置14A,14Bと後述する拡散透過部材21との間に設けてある。レンズフード手段55は、2台の前部側受光装置14A,14Bが検出箇所Jから受光するための受光経路R1が通るフード筒部56と、フード筒部56の外周囲に位置する遮光板部57とを備えて構成してある。遮光板部57は、2台の前部側受光装置14A,14Bと、後述する拡散透過部材21、後述する複数のライン状照明装置23a,23b,23c及び後述する前部側の投射部材32との間に配備してある。フード筒部56の内周面及び外周面、並びに遮光板部57の検出箇所Jが位置する側の側面に、白色のセラミックコートを施してある。 Specifically, as shown in FIGS. 14, 15, and 17, the lens hood means 55 is provided between the two front side light-receiving devices 14 </ b> A and 14 </ b> B and the diffuse transmission member 21 described later. The lens hood means 55 includes a hood tube portion 56 through which a light receiving path R1 for receiving light from the detection point J by the two front light receiving devices 14A and 14B, and a light shielding plate portion positioned on the outer periphery of the hood tube portion 56. 57. The light shielding plate 57 includes two front light-receiving devices 14A and 14B, a diffuse transmission member 21 to be described later, a plurality of linear illumination devices 23a, 23b and 23c to be described later, and a projection member 32 to be described later. Deployed between. A white ceramic coat is applied to the inner and outer peripheral surfaces of the hood cylinder portion 56 and the side surface of the light shielding plate portion 57 on the side where the detection portion J is located.
 フード筒部56の基部と遮光板部57の中間部とを連結し、遮光板部57を3個のライン状照明装置23a,23bの背部に止着してある。従って、レンズフード手段55は、ライン状照明装置23a,23b、及び4個のライン状照明装置23a,23b,23cの両端部を収納ケース11における側部カバー11Aに取付けている取付け板31を介して収納ケース11に支持されている。 The base portion of the hood tube portion 56 and the intermediate portion of the light shielding plate portion 57 are connected, and the light shielding plate portion 57 is fixed to the back portions of the three line illumination devices 23a and 23b. Accordingly, the lens hood means 55 is connected to the line-shaped illumination devices 23a and 23b and the four plate-shaped illumination devices 23a, 23b, and 23c via the mounting plate 31 that is attached to the side cover 11A of the storage case 11. And is supported by the storage case 11.
 遮光板部57のうちの3個のライン状照明装置23a,23bの背後に位置する部位における検出箇所Jに向う側面を、検出箇所Jが位置する側とは反対側に凸の凹入面に形成して、遮光板部57のうちの3個のライン状照明装置23a,23bの背後に位置する部位を、検出箇所Jに向う反射光を発生させる反射部57aに構成してある。 The side face of the light shielding plate 57 that faces the detection point J in the part located behind the three line-shaped illumination devices 23a and 23b is a concave surface that is convex on the side opposite to the side where the detection part J is located. The part which is formed and is located behind the three line-shaped illumination devices 23a and 23b in the light shielding plate part 57 is configured as a reflection part 57a that generates reflected light toward the detection part J.
 つまり、検出箇所Jからの光を、フード筒部56の内部を通して2台の前部側受光装置14A,14Bに受光させる。ライン状照明装置23a,23b,23c、拡散透過部材21及び投射部材32から前部側受光装置14A,14Bに向けて漏れるとか反射する光を、2台の前部側受光装置14A,14Bに受光されないようにフード筒部56及び遮光板部57の全体によって遮光する。ライン状照明装置23a,23b,23c及び拡散透過部材21から前部側受光装置14A,14Bに向けて漏れるとか反射する光を、反射部57aにより、検出箇所Jに向けて反射させてペレット群kに対する照明光にする。 That is, the light from the detection point J is received by the two front light receiving devices 14A and 14B through the inside of the hood tube portion 56. Light that leaks or reflects from the line-shaped illumination devices 23a, 23b, 23c, the diffuse transmission member 21, and the projection member 32 toward the front light receiving devices 14A, 14B is received by the two front light receiving devices 14A, 14B. The light is shielded by the entire hood tube portion 56 and the light shielding plate portion 57 so as not to occur. The light reflected from the line-shaped illumination devices 23a, 23b, and 23c and the diffuse transmission member 21 to the front-side light-receiving devices 14A and 14B is reflected toward the detection point J by the reflection unit 57a, and the pellet group k. Lighting light for
 フード筒部56は、受光経路R1に沿う方向視での形状が2台の前部側受光装置14A,14Bに一連に亘る横長形状となるように構成してある。フード筒部56は、2台の前部側受光装置14A,14Bから離れるほど、言い換えると拡散透過部材21に近づくほど内径が小さくなる先細り形状に形成してあり、フード筒部56に斜め方向からの光が入り込んでも、前部側受光装置14A,14Bに悪影響を与え難いように構成してある。すなわち、フード筒部56に斜め方向から入り込んだ光がフード筒部56の内壁面で前部側受光装置14A,14Bに向う方向に反射しても、反射した光は、フード筒部56の先細り形状による内壁面の傾斜により、前部側受光装置14A,14Bの光軸CL1から外側に外れる方向に向かうことになる。 The hood tube portion 56 is configured such that the shape in the direction along the light receiving path R1 is a horizontally long shape extending over the two front side light receiving devices 14A and 14B. The hood tube portion 56 is formed in a tapered shape such that the inner diameter decreases as the distance from the two front side light-receiving devices 14A and 14B increases, that is, the closer the diffuse transmission member 21 is approached. Even if light enters, the front side light receiving devices 14A and 14B are hardly affected. That is, even if light entering the hood tube portion 56 from an oblique direction is reflected by the inner wall surface of the hood tube portion 56 toward the front light receiving devices 14A and 14B, the reflected light is tapered in the hood tube portion 56. Due to the inclination of the inner wall surface due to the shape, the front side light receiving devices 14A and 14B are directed outwardly from the optical axis CL1.
 フード筒部56は、上下の偏平な横板部56a及び左右の偏平な縦板部56bを備えて構成してある。上下の横板部56a及び左右の縦板部56bは、フード筒部56の先端側ほど光軸CL1に近付く状態で光軸CL1に対して傾斜している。従って、フード筒部56の内壁面は、上下側及び左右側のいずれの部位においても、フード筒部56の先端側ほど光軸CL1に近付く状態で傾斜した傾斜内壁面になっており、フード筒部56に斜め方向から入り込んだ光を光軸CL1から外側に外れる方向に反射させる。 The hood cylinder portion 56 includes an upper and lower flat horizontal plate portion 56a and a left and right flat vertical plate portion 56b. The upper and lower horizontal plate portions 56a and the left and right vertical plate portions 56b are inclined with respect to the optical axis CL1 so as to approach the optical axis CL1 toward the distal end side of the hood tube portion 56. Accordingly, the inner wall surface of the hood tube portion 56 is an inclined inner wall surface that is inclined so as to approach the optical axis CL1 toward the tip end side of the hood tube portion 56 in both the upper and lower sides and the left and right sides. The light entering the portion 56 from an oblique direction is reflected in a direction deviating outward from the optical axis CL1.
 図14,18に示すように、2つの前部側受光装置14A,14Bの受光経路R1に、分割処理膜81が一側面に備えられた光透過体80を設けてある。光透過体80は、拡散透過部材21に前部側受光装置14A,14Bの受光経路R1が通るように設けた光通過孔70に組み付けてあり、拡散透過部材21に支持されている。 As shown in FIGS. 14 and 18, a light transmitting body 80 having a divided processing film 81 provided on one side surface is provided in the light receiving path R1 of the two front side light receiving devices 14A and 14B. The light transmitting member 80 is assembled to the light transmitting hole 70 provided so that the light receiving path R1 of the front light receiving devices 14A and 14B passes through the diffuse transmitting member 21, and is supported by the diffuse transmitting member 21.
 前部側受光装置14A,14Bの集光レンズ17の暗い箇所が検出箇所Jのペレットに写り込むと、ペレットに暗い影が発生して、この暗い影が後部側受光装置15A、15Bに写り込むことがある。この写り込みを防止するように、前部側受光装置14A,14Bの集光レンズ17の暗い箇所がペレットに写り込むことを防止するよう構成してある。 When the dark spot of the condensing lens 17 of the front light receiving devices 14A and 14B is reflected in the pellet of the detection spot J, a dark shadow is generated in the pellet, and this dark shadow is reflected in the rear light receiving devices 15A and 15B. Sometimes. In order to prevent this reflection, the dark portion of the condensing lens 17 of the front light-receiving devices 14A and 14B is prevented from being reflected in the pellet.
 すなわち、光透過体80は、板ガラスあるいはアクリルなど有機ガラスによって構成してある。分割処理膜81は、有機ガラスの側面に錫や銀をめっきあるいは蒸着することによって構成してあり、検出箇所Jに向かう方向で分割処理膜81に入射する入射光を反射光と透過光とに分割する分割処理を行う。具体的には、分割処理膜81は、入射光の6割が反射光となり、入射光の4割が透過光となるように分割処理するよう構成してある。入射光を反射光と透過光とに分割する割合としては、6対4の割合に限らず、前部側受光装置14A,14Bから検出箇所Jに向う光の強さに対応した適切な割合を設定するとよい。 That is, the light transmitting body 80 is made of organic glass such as plate glass or acrylic. The divided processing film 81 is configured by plating or vapor-depositing tin or silver on the side surface of the organic glass. The incident light incident on the divided processing film 81 in the direction toward the detection portion J is converted into reflected light and transmitted light. A division process for dividing is performed. Specifically, the split processing film 81 is configured to perform split processing so that 60% of incident light becomes reflected light and 40% of incident light becomes transmitted light. The ratio of dividing the incident light into the reflected light and the transmitted light is not limited to the ratio of 6 to 4, but an appropriate ratio corresponding to the intensity of light from the front side light receiving devices 14A and 14B toward the detection point J can be used. It is good to set.
 つまり、前部側受光装置14A,14Bから検出箇所Jに向う光が、光透過体80を透過する際、分割処理膜81によって検出箇所Jに届く透過光と、検出箇所Jに届かない反射光とに分割処理される。これにより、前部側受光装置14A,14Bから検出箇所Jに届く光が弱くなり、前部側受光装置14A,14Bの集光レンズ17の暗い箇所がペレットに写り込み難くなる。 That is, when the light directed from the front light-receiving devices 14A and 14B toward the detection point J passes through the light transmitting body 80, the transmitted light reaches the detection point J by the divided processing film 81 and the reflected light does not reach the detection point J. It is divided into and. Thereby, the light reaching the detection point J from the front side light receiving devices 14A and 14B becomes weak, and the dark portion of the condenser lens 17 of the front side light receiving devices 14A and 14B is hardly reflected on the pellet.
 図18に示すように、光透過体80に備えてある分割処理膜81は、光透過体80の検出箇所Jに向かう側の側面に備えてある。光透過体80の前部側受光装置14A,14Bに向う側の側面に反射防止膜82としてのARコートを備えてある。 As shown in FIG. 18, the divided treatment film 81 provided in the light transmitting body 80 is provided on the side surface of the light transmitting body 80 on the side facing the detection location J. An AR coating as an antireflection film 82 is provided on the side surface of the light transmitting body 80 facing the front light receiving devices 14A and 14B.
 光透過体80が備える分割処理膜81は、光透過体80の側面を鏡面状に形成し、前部側受光装置14A,14Bに向う反射光を発生させ易い。反射防止膜82は、光透過体80の前部側受光装置14A,14Bに向う側面での反射光の発生を抑制する。つまり、光透過体80に分割処理膜81を備えるものでありながら、光透過体80において前部側受光装置14A,14Bに向かう状態で発生する反射光を弱く抑制できる。 The division processing film 81 included in the light transmitting body 80 forms the side surface of the light transmitting body 80 in a mirror shape and easily generates reflected light toward the front light receiving devices 14A and 14B. The antireflection film 82 suppresses the generation of reflected light on the side surfaces of the light transmitting body 80 facing the front light receiving devices 14A and 14B. That is, although the light-transmitting body 80 includes the divided processing film 81, the reflected light generated in the light-transmitting body 80 in the state toward the front-side light receiving devices 14A and 14B can be suppressed weakly.
 照明用光源20は、拡散透過部材21における凸状曲面Qに沿って並ぶ状態で複数の発光部としての複数のライン状照明装置23を備えて構成されている。具体的には、図14及び図17に示すように、検出箇所Jの装置横幅方向に沿う幅と同じ又は略同じ幅を備える状態で装置横幅方向に長尺の複数のライン状照明装置23を凸状曲面Qに沿って並ぶ状態で備えて構成されている。 The illumination light source 20 is configured to include a plurality of line illumination devices 23 as a plurality of light emitting units in a state of being aligned along the convex curved surface Q of the diffuse transmission member 21. Specifically, as shown in FIGS. 14 and 17, a plurality of line-like illumination devices 23 that are long in the device width direction are provided in a state having the same or substantially the same width as the width along the device width direction of the detection location J. It is provided with being arranged along the convex curved surface Q.
 つまり、前記光軸CL1に近接する状態で光軸CL1に対して上下方向に略均等に振り分け配置されて、ペレット群kの移送方向と略直交する方向に向けて光を出射させる一対の水平光発光用のライン状照明装置23a,23aと、前記光軸CL1から離れる状態で光軸CL1に対して上下方向に略均等に振り分け配置されて、ペレット群kの移送方向に略沿う方向に向けて光を出射させる一対の垂直光発光用のライン状照明装置23b,23cとがあり、合計4個のライン状照明装置23a,23b,23cが備えられる構成となっている。4個のライン状照明装置23a,23b,23cは、移動落下経路IKのうちの検出箇所Jを含む部位IKaにおけるペレット群kの移動方向に並んでいる。 That is, a pair of horizontal lights that are arranged approximately equally in the vertical direction with respect to the optical axis CL1 in a state of being close to the optical axis CL1 and emit light in a direction substantially orthogonal to the transfer direction of the pellet group k. The light emitting line illumination devices 23a, 23a and the light illuminating devices 23a and 23a are arranged so as to be substantially evenly distributed in the vertical direction with respect to the optical axis CL1 in a state of being separated from the optical axis CL1, and toward a direction substantially along the transfer direction of the pellet group k. There are a pair of vertical illumination devices 23b and 23c for emitting light, and a total of four linear illumination devices 23a, 23b and 23c are provided. The four linear illumination devices 23a, 23b, and 23c are arranged in the moving direction of the pellet group k in the part IKa that includes the detection part J in the moving and dropping path IK.
 後部側照明部19は、光を出射する方向が装置の前後で異なるように配置状態が前後で逆になっているが、前部側照明部18と同じ構成である。すなわち、検出箇所Jに向けて出射させる照明用光源24と、その照明用光源24から検出箇所Jに向けて出射された光を拡散光として透過させる拡散透過部材25とを備えて構成されている。
 説明を加えると、拡散透過部材25は、検出箇所Jから他方側外方としての装置後部側外方に向けて凸状に湾曲する凸状曲面Qを有し且つ横幅方向に向かって延びる略半円筒状に構成されている。尚、拡散透過部材25の幅方向中央部には、検出箇所Jからの光を後部側受光装置15A,15Bに導くための光通過孔71が形成されている。
The rear side illumination unit 19 has the same configuration as the front side illumination unit 18 although the arrangement state is reversed between the front and the back so that the light emitting direction is different between the front and the rear of the apparatus. In other words, the illumination light source 24 is emitted toward the detection location J, and the diffusion transmission member 25 is configured to transmit the light emitted from the illumination light source 24 toward the detection location J as diffused light. .
In other words, the diffusing and transmitting member 25 has a convex curved surface Q that curves convexly from the detection point J toward the outer side of the rear side of the apparatus as the outer side of the other side, and extends substantially in the lateral width direction. It is configured in a cylindrical shape. A light passage hole 71 for guiding the light from the detection point J to the rear side light receiving devices 15A and 15B is formed at the center in the width direction of the diffuse transmission member 25.
 そして、照明用光源24は、拡散透過部材25における凸状曲面Qに沿って並ぶ状態で複数の発光部として複数のライン状照明装置27を備えて構成されている。すなわち、検出箇所Jの装置横幅方向に沿う幅と同じ又は略同じ幅を備える状態で横幅方向に長尺の複数のライン状照明装置27を凸状曲面Qに沿って並ぶ状態で備えて構成されている。 The illumination light source 24 is configured to include a plurality of line illumination devices 27 as a plurality of light emitting units in a state of being aligned along the convex curved surface Q of the diffusing and transmitting member 25. That is, it is configured to include a plurality of line-shaped illumination devices 27 that are long in the horizontal width direction along the convex curved surface Q in a state having the same or substantially the same width as the width along the device horizontal width direction of the detection location J. ing.
 具体的には、光軸CL2に近接する状態で光軸CL2に対して上下方向に略均等に振り分け配置されて、ペレット群kの移送方向と略直交する方向に向けて光を出射させる一対の水平光発光用のライン状照明装置27a,27aと、前記光軸CL2から離れる状態で光軸CL2に対して上下方向に略均等に振り分け配置されて、ペレット群kの移送方向に略沿う方向に向けて光を出射させる一対の垂直光発光用のライン状照明装置27b,27cとがあり、合計4個のライン状照明装置27a,27b,27cが備えられる構成となっている。4個のライン状照明装置27a,27b,27cは、移動落下経路IKのうちの検出箇所Jを含む部位IKaにおけるペレット群kの移動方向に並んでいる。 Specifically, a pair of light beams that are arranged substantially equally in the vertical direction with respect to the optical axis CL2 in a state of being close to the optical axis CL2 and emit light in a direction substantially orthogonal to the transfer direction of the pellet group k. Horizontal light emitting line illuminators 27a, 27a and the optical axis CL2 in a state of being separated from the optical axis CL2 and distributed substantially evenly in the vertical direction, in a direction substantially along the transfer direction of the pellet group k. There are a pair of vertical illuminating line illumination devices 27b and 27c that emit light toward the light source, and a total of four line illuminating devices 27a, 27b, and 27c are provided. The four line illumination devices 27a, 27b, and 27c are arranged in the moving direction of the pellet group k in the part IKa that includes the detection part J in the moving and dropping path IK.
 前部側照明部18及び後部側照明部19の夫々において、4個のライン状照明装置23,27のうちのペレット群移動方向上手側に位置する上手側ライン状照明装置23b,27bの照明範囲、及び4個のライン状照明装置23,27のうちのペレット群移動方向下手側に位置する下手側ライン状照明装置23c,27cの照明範囲を、4個のライン状照明装置23,27のうちの上手側ライン状照明装置23b,27bと下手側ライン状照明装置23c,27cとの間に位置する中ライン状照明装置23a,27aの照明範囲より狭く設定してある。上手側ライン状照明装置23b,27bの照明範囲と下手側ライン状照明装置23c,27cの照明範囲とは、同じ又はほぼ同じに設定してある。 In each of the front side illumination unit 18 and the rear side illumination unit 19, the illumination range of the upper side line illumination devices 23b and 27b located on the upper side in the pellet group movement direction among the four line illumination devices 23 and 27. , And the illumination range of the lower side line illumination devices 23c and 27c located on the lower side in the pellet group movement direction of the four line illumination devices 23 and 27 is the same as the illumination range of the four line illumination devices 23 and 27. It is set narrower than the illumination range of the middle line illumination devices 23a, 27a located between the upper line illumination devices 23b, 27b and the lower line illumination devices 23c, 27c. The illumination range of the upper-side line illumination devices 23b and 27b and the illumination range of the lower-side line illumination devices 23c and 27c are set to be the same or substantially the same.
 検出箇所Jに位置するペレットの中間部の表面形状が横向きに凸の円弧や湾曲形状となっても、ペレットの中間部に当った光は、前部側受光装置14A,14B及び後部側受光装置15A、15Bに向かって反射し易い。これに対し、検出箇所Jに位置するペレットの上端部の表面形状は、上向きに凸の円弧や湾曲形状あるいはそれに近い形状となり、検出箇所Jに位置するペレットの下端部の表面形状は、下向きに凸の円弧や湾曲形状あるいはそれに近い形状となることにより、ペレットの上端部及び下端部では、中間部に比べ、前部側受光装置14A、14B及び後部側受光装置15A,15Bに向かって反射する光が弱くなり易い。しかし、出射する光がペレットの上端部に当たる上手側ライン状照明装置23b,27bの照射範囲、及び出射する光がペレットの下端部に当たる下手側ライン状照明装置23c,27cの照射範囲を、出射する光がペレットの中間部に当たる中ライン状照明装置23a,27aの照射範囲より狭く設定してあるから、上手側ライン状照明装置23b,27b及び下手側ライン状照明装置23c,27cは、中ライン状照明装置23a,27aよりも集中した強い光をペレットの上端部や下端部に向けて出射する。従って、ペレットの上端部及び下端部から前部側受光装置14A,14B及び後部側受光装置15A、15Bに向かう反射光と、ペレットの中間部から前部側受光装置14A,14B及び後部側受光装置15A、15Bに向かう反射光との強さの差が無いとかあまり無いことになり、正常物のペレットであるにもかかわらず、上端部や下端部が暗くなった状態で前部側受光装置14A,14B及び後部側受光装置15A、15Bに写ることを防止できる。 Even if the surface shape of the intermediate portion of the pellet located at the detection point J becomes a horizontally convex arc or curved shape, the light hitting the intermediate portion of the pellet is the front side light receiving devices 14A and 14B and the rear side light receiving device. It is easy to reflect toward 15A and 15B. On the other hand, the surface shape of the upper end portion of the pellet located at the detection location J is an upwardly convex arc, a curved shape, or a shape close thereto, and the surface shape of the lower end portion of the pellet located at the detection location J is downward. By forming a convex arc, a curved shape, or a shape close thereto, the upper and lower ends of the pellet are reflected toward the front light receiving devices 14A and 14B and the rear light receiving devices 15A and 15B as compared to the middle portion. Light tends to be weak. However, the irradiation range of the upper side line illumination devices 23b and 27b in which the emitted light hits the upper end portion of the pellet and the irradiation range of the lower side line illumination devices 23c and 27c in which the emitted light hits the lower end portion of the pellet are emitted. Since light is set to be narrower than the irradiation range of the middle line illumination devices 23a and 27a where the light hits the middle part of the pellet, the upper side line illumination devices 23b and 27b and the lower side line illumination devices 23c and 27c are in the middle line shape. Strong light concentrated more than the illumination devices 23a and 27a is emitted toward the upper end and lower end of the pellet. Therefore, the reflected light from the upper and lower ends of the pellet toward the front light receiving devices 14A and 14B and the rear light receiving devices 15A and 15B, and the front light receiving devices 14A and 14B and the rear light receiving device from the intermediate portion of the pellet. There is no difference in intensity from the reflected light toward 15A and 15B, and there is not much difference, and the front side light receiving device 14A is in a state where the upper end and the lower end are dark although it is a normal pellet. , 14B and the rear side light receiving devices 15A, 15B.
 また、ペレットの上端部及び下端部から前部側受光装置14A,14B及び後部側受光装置15A、15Bに向かう反射光が適切な強さの反射光になるように設定した上手側ライン状照明装置23b,27b及び下手側ライン状照明装置23c,27cの照射範囲と同じ狭い照射範囲を中ライン状照明装置23a,27aに備えた場合、ペレットの中間部に強い光が集中的に当ってハレーションが発生し易い。しかし、中ライン状照明装置23a,27aの照射範囲が上手側ライン状照明装置23b,27b及び下手側ライン状照明装置23c,27cの照射範囲より広いことにより、ハレーションの発生を回避できる。 Further, the upper-side line illumination device is set so that the reflected light from the upper end and the lower end of the pellet toward the front light-receiving devices 14A and 14B and the rear light-receiving devices 15A and 15B becomes reflected light with an appropriate intensity. When the middle line illumination devices 23a and 27a have the same narrow illumination range as the illumination ranges of 23b and 27b and the lower line illumination devices 23c and 27c, intense light hits the middle part of the pellet and halation occurs. It is easy to generate. However, since the irradiation range of the middle line illumination devices 23a and 27a is wider than that of the upper line illumination devices 23b and 27b and the lower line illumination devices 23c and 27c, the occurrence of halation can be avoided.
 図14,15に示すように、移動落下経路IKのうちの検出箇所Jを含む部位IKaの両横側方と収納ケース11における側部カバー11Aとの間に位置する箇所に反射部材85を設けてある。前記部位IKaの両横側の反射部材85は、前部側受光装置14A,14B及び後部側受光装置15A、15Bの受光方向に交差する方向での拡散透過部材21,25の横側方に位置する箇所に配置してある。図15,17に示すように、前記部位IKaの両横側の反射部材85は、反射部材85から検出箇所Jが位置する側とは反対側に延出した一対の支持アーム86,86を備え、一対の支持アーム86,86の延出端部を収納ケース11の側部カバー11Aに連結して収納ケース11に支持させるように構成してある。 As shown in FIGS. 14 and 15, a reflecting member 85 is provided at a position located between both lateral sides of the part IKa including the detection part J in the moving drop path IK and the side cover 11 </ b> A in the storage case 11. It is. The reflection members 85 on both lateral sides of the part IKa are positioned on the lateral sides of the diffuse transmission members 21 and 25 in a direction crossing the light receiving direction of the front light receiving devices 14A and 14B and the rear light receiving devices 15A and 15B. It is arranged at the place to do. As shown in FIGS. 15 and 17, the reflecting member 85 on both sides of the part IKa includes a pair of support arms 86 and 86 extending from the reflecting member 85 to the side opposite to the side where the detection location J is located. The extended end portions of the pair of support arms 86, 86 are connected to the side cover 11A of the storage case 11 so as to be supported by the storage case 11.
 前記部位IKaの両横側の反射部材85は、移動落下経路IKにおける前記部位1Kaから横外側に漏れ出ようとする光を、検出箇所Jに向けて反射させてペレット群kの照明用にする。前記部位IKaの両横側の反射部材85の検出箇所Jに向かう側面に、白色のセラミックコートを施して形成した反射面85aを備えてある。 The reflecting members 85 on both lateral sides of the part IKa reflect the light that leaks laterally outward from the part 1Ka in the moving and dropping path IK toward the detection part J to illuminate the pellet group k. . A reflecting surface 85a formed by applying a white ceramic coat is provided on the side face of the reflecting member 85 on both sides of the part IKa toward the detection point J.
 このように、ペレット群kの移送方向と略直交する方向に向けて光を出射させる一対の水平光発光用のライン状照明装置23a,27aと、ペレット群kの移送方向に略沿う方向に向けて光を出射させる一対の垂直光発光用のライン状照明装置23b,23c,27b,27cとが備えられ、しかも、それらから出射された光を拡散光として透過させる半円筒状の拡散透過部材21,25を備えることから、さらに、レンズフード手段55,65が反射機能を備えることから、さらに、反射部材85を備えることから、検出箇所Jに位置するペレットに対して照明される光が、ペレットの外周部の広い範囲にわたって略均等に拡散された状態となる。上手側ライン状照明装置23b,27b及び下手側ライン状照明装置23c,27cが中ライン状照明装置23a,27aよりも狭い照射範囲を備えて集中した強い光をペレット群kに当てるから、ペレットの上端部及び下端部が前部側受光装置14A,14B及び後部側受光装置15A,15Bに暗くなって写ることが無い。 As described above, the pair of horizontal light emitting line illumination devices 23a and 27a that emit light in a direction substantially orthogonal to the transfer direction of the pellet group k, and the direction substantially along the transfer direction of the pellet group k. And a pair of vertical light emitting line illumination devices 23b, 23c, 27b, and 27c for emitting light, and a semi-cylindrical diffuse transmission member 21 that transmits the light emitted therefrom as diffused light. , 25, the lens hood means 55, 65 has a reflecting function, and further includes a reflecting member 85, so that the light illuminating the pellet located at the detection point J It becomes the state diffused substantially uniformly over the wide range of the outer peripheral part. Since the upper side line illuminating devices 23b and 27b and the lower side line illuminating devices 23c and 27c have a narrower irradiation range than the middle line illuminating devices 23a and 27a, the concentrated strong light is applied to the pellet group k. The upper end portion and the lower end portion do not appear dark on the front side light receiving devices 14A and 14B and the rear side light receiving devices 15A and 15B.
 その結果、ペレットが透明な材料で形成されるものであっても、異常な箇所が存在しない正常なペレットであれば、光の強さが大きい特に明るい部分や光の強さが小さい影の部分等が生じるおそれが少ないものになる。 As a result, even if the pellet is formed of a transparent material, if it is a normal pellet that does not have an abnormal part, the light part with particularly high light intensity or the shadow part with low light intensity Etc. are less likely to occur.
 図14に示すように、検出箇所Jの下方に、分離手段としてエアー吹き付け装置7を設けてある。エアー吹き付け装置7は、検出箇所Jからペレット群kが落下する落下経路Lに対してその横側としての装置後方側に外れた箇所に位置している。エアー吹き付け装置7は、検出箇所Jでの受光情報に基づいて判別された異常物(例えば、樹脂処理過程で焼けて着色したペレットや、色の違うペレット等)に対してエアーを吹き付けて、異常物を正常なペレット群kの移動方向から分離させる。
 このエアー吹き付け装置7は、噴射ノズル7aの複数個を、検出箇所Jの横幅方向全幅を所定幅で複数個の区画に分割形成した各区画に対応する状態で並置させ、異常物が存在する区画の噴射ノズル7aが作動して異常物を吹き飛ばすように構成されている。
As shown in FIG. 14, an air blowing device 7 is provided below the detection location J as a separating means. The air spraying device 7 is located at a position deviated to the rear side of the device as a lateral side of the dropping path L where the pellet group k falls from the detection location J. The air blowing device 7 blows air against abnormal objects (for example, pellets burned and colored in the resin processing process, pellets of different colors, etc.) identified based on the received light information at the detection location J. The product is separated from the normal moving direction of the pellet group k.
This air spraying device 7 has a plurality of spray nozzles 7a juxtaposed in a state corresponding to each section formed by dividing the entire width of the detection location J into a plurality of sections with a predetermined width, and a section where abnormal objects are present. The spray nozzle 7a is activated to blow away abnormal objects.
 図14に示すように、エアー吹き付け装置7の上方に下第1反射部材90を設け、検出箇所Jから下方に抜け出ようとする光を、エアー吹き付け装置7に当たって乱反射しないように、エアー吹き付け装置7の上方箇所で下第1反射部材90によって検出箇所Jに向けて反射させてペレット群kの照明用にするよう構成してある。 As shown in FIG. 14, a lower first reflecting member 90 is provided above the air blowing device 7, and the air blowing device 7 prevents light that tries to escape downward from the detection location J from striking the air blowing device 7. Are reflected toward the detection point J by the lower first reflecting member 90 and used for illumination of the pellet group k.
 図15,17に示すように、下第1反射部材90は、装置横方向に長い扁平な主反射板部91と、主反射板部91の装置横方向での両端から斜めに立ち上がった偏平な副反射板部92とを備えている。下第1反射部材90は、主反射板部91の裏面側から下向きに延出した一対の取付け脚部93,93を備え、エアー吹き付け装置7に一対の取付け脚部93,93によって連結して支持させるように構成してある。下第1反射部材90の全体での装置横方向での長さは、検出箇所Jの装置横方向幅と同じ又は略同じ長さに設定してある。主反射板部91及び副反射板部92の検出箇所Jに向かう上向き面に、白色のセラミックコートを施して形成した反射面91a,92aを備えてある。主反射板部91の反射面91aは、検出箇所Jからペレット群kが落下する落下経路Lから横外側に外れるほど高い配置高さに位置する傾斜面になっており、下第1反射部材90は、検出箇所Jからのベレットが主反射板部91及び副反射板部92の上に落ちても、主反射板部91及び副反射板部92の傾斜によって落下経路Lに自ずと落下させるガイド機能を備えている。 As shown in FIGS. 15 and 17, the lower first reflecting member 90 includes a flat main reflector 91 that is long in the lateral direction of the apparatus and a flat that rises obliquely from both ends of the main reflector 91 in the lateral direction of the apparatus. And a sub-reflecting plate portion 92. The lower first reflecting member 90 includes a pair of mounting legs 93, 93 extending downward from the back surface side of the main reflector 91, and is connected to the air blowing device 7 by the pair of mounting legs 93, 93. It is configured to be supported. The overall length of the lower first reflecting member 90 in the apparatus lateral direction is set to be the same or substantially the same as the apparatus lateral direction width of the detection location J. Reflecting surfaces 91a and 92a formed by applying a white ceramic coat are provided on the upward surfaces of the main reflecting plate portion 91 and the sub-reflecting plate portion 92 toward the detection location J. The reflecting surface 91a of the main reflecting plate portion 91 is an inclined surface that is located at a higher arrangement height as it moves to the lateral outer side from the falling path L where the pellet group k falls from the detection location J, and the lower first reflecting member 90 Is a guide function that causes the main reflector plate 91 and the sub-reflector plate portion 92 to naturally fall on the fall path L even if the beret from the detection point J falls on the main reflector plate 91 and the sub-reflector plate portion 92. It has.
 そして、図13に示すように、噴射ノズル7aからのエアーの吹き付けを受けずにそのまま進行してくる正常なペレットを回収する正常物用の回収部6(以下、正常物回収部6と称する。)と、エアーの吹き付けを受けて正常なペレットの流れから横方向に分離した異常物を回収する異常物用の回収部39(以下、異常物回収部39と称する。)とが設けられ、正常物回収部6が横幅方向に細長い筒状に形成され、エアーの吹き付けにより飛ばされたペレットを回収するように、異常物回収部39が形成されている。 And as shown in FIG. 13, the collection part 6 for normal goods which collects the normal pellet which progresses as it is, without receiving blowing of the air from the injection nozzle 7a (henceforth the normal product collection part 6 is called). ) And an abnormal material recovery unit 39 (hereinafter referred to as an abnormal material recovery unit 39) for recovering abnormal materials separated from the normal pellet flow in the lateral direction by air blowing. The object recovery unit 6 is formed in a cylindrical shape that is elongated in the width direction, and the abnormal object recovery unit 39 is formed so as to recover the pellets that have been blown off by the blowing of air.
 図14,15に示すように、検出箇所Jの下方に、装置横方向に長い案内体95を設けてある。案内体95は、落下経路Lに対してエアー吹き付け装置7が位置する側とは反対側に外れた箇所に位置している。案内体95は、落下経路Lからその横側としての装置前方側に外れるほど低い配置高さに位置する傾斜状態の傾斜案内面95aを備え、エアー吹き付け装置7によって飛ばされた異常物を、傾斜案内面95aによって異常物回収部39に落下するように案内する。 As shown in FIGS. 14 and 15, a guide 95 that is long in the lateral direction of the apparatus is provided below the detection point J. The guide body 95 is located at a position away from the side opposite to the side where the air blowing device 7 is located with respect to the drop path L. The guide body 95 includes an inclined guide surface 95a in an inclined state that is positioned so as to be lowered from the fall path L to the front side of the apparatus as a lateral side thereof, and tilts abnormal objects that have been blown by the air blowing device 7. The guide surface 95a guides the abnormal object collection unit 39 to drop.
 案内体95の上方に装置横方向に長い平板状の下第2反射部材97を設け、検出箇所Jから下方に抜け出ようとする光を、案内体95に当たって反射しないように、案内体95の上方箇所で下第2反射部材97によって検出箇所Jに向けて反射させてペレット群kの照明用にするよう構成してある。 A flat second lower reflecting member 97 that is long in the lateral direction of the apparatus is provided above the guide body 95, so that the light that tries to escape downward from the detection point J does not hit the guide body 95 and is not reflected. It is configured to be reflected toward the detection point J by the lower second reflecting member 97 at a point for illumination of the pellet group k.
 図3,5に示すように、下第2反射部材97の装置横方向での長さは、検出箇所Jの装置横方向幅と同じ又は略同じ長さに設定してある。下第2反射部材97の検出箇所Jに向かう上向き面に、白色のセラミックコートを施して形成した反射面97aを備えてある。下第2反射部材97は、装置横方向での両端部の折り曲げ端部によって構成した取付け脚部98を備え、取付け脚部98を案内体95の上面側に連結して案内体95に支持させるように構成してある。 As shown in FIGS. 3 and 5, the length of the lower second reflecting member 97 in the apparatus lateral direction is set to be the same as or substantially the same as the width of the detection position J in the apparatus lateral direction. A reflective surface 97a formed by applying a white ceramic coat is provided on the upward surface of the lower second reflective member 97 toward the detection point J. The lower second reflecting member 97 includes an attachment leg 98 constituted by bent ends at both ends in the lateral direction of the apparatus, and the attachment leg 98 is connected to the upper surface side of the guide body 95 and supported by the guide body 95. It is constituted as follows.
〔第2実施形態の別実施形態〕
(1)上記した実施形態では、拡散透過部材21,25の凸状曲面Qに沿って位置する照明用光源20,24を、夫々独立に形成されたライン状照明装置23,27を備えて構成した例を示したが、この構成に替えて、例えば、図20及び図11に示すように、照明用光源20,24を、拡散透過部材21,25の凸状曲面Qに沿うように略円弧状に一体的に形成された1つの照明装置60によって構成してもよい。尚、この構成では、照明用光源20,24が凸状曲面Qに沿うように一体的に形成されるものであるから、その中央部には、検出箇所Jから受光手段10に向けて光を通過させるための光通過孔73,74が形成されることになる。
 又、図12に示すように、多角形状に一体的に形成された1つの照明装置61にて構成されるもの等でもよい。
[Another embodiment of the second embodiment]
(1) In the above-described embodiment, the illumination light sources 20 and 24 positioned along the convex curved surfaces Q of the diffusing and transmitting members 21 and 25 are provided with the line illumination devices 23 and 27 formed independently of each other. However, instead of this configuration, for example, as shown in FIGS. 20 and 11, the illumination light sources 20 and 24 are substantially circular along the convex curved surface Q of the diffuse transmission members 21 and 25. You may comprise by the one illuminating device 60 integrally formed in the arc shape. In this configuration, since the illumination light sources 20 and 24 are integrally formed along the convex curved surface Q, light is directed toward the light receiving means 10 from the detection point J at the center. The light passage holes 73 and 74 for allowing the light to pass therethrough are formed.
Moreover, as shown in FIG. 12, what is comprised by the one illuminating device 61 integrally formed in polygonal shape etc. may be sufficient.
(2)上記した実施形態では、複数の発光部23,27(ライン状照明装置23,27)の全てが拡散透過部材21,25の近くに寄った箇所で拡散透過部材21,25に沿って一列に並ぶ構成を採用した例を示したが、複数の発光部23,27が拡散透過部材21,25の近くに寄った箇所に拡散透過部材21,25に沿って位置する列と、受光装置14A,14B,15A,15Bに寄った箇所に拡散透過部材21,25に沿って位置する列とに分かれて並ぶ構成を採用して実施してもよい。 (2) In the above-described embodiment, all of the plurality of light emitting units 23 and 27 (line illumination devices 23 and 27) are close to the diffuse transmission members 21 and 25 along the diffuse transmission members 21 and 25. Although the example which employ | adopted the structure located in a line was shown, the row | line | column located along the diffuse transmission member 21 and 25 in the location where the several light emission parts 23 and 27 approached the diffuse transmission member 21 and 25, and the light-receiving device You may implement by employ | adopting the structure divided and arranged in the row | line | column located along the diffuse transmission member 21 and 25 in the location near 14A, 14B, 15A, 15B.
(3)上記した実施形態では、4個の発光部23,27(ライン状照明装置23,27)を備え、中発光部23a,27aよりも照射範囲が狭い上手側発光部23b,27b及び下手側発光部23c,27cとして1個の発光部を採用した例を示したが、数多くの発光部23,24を備え、中発光部23a,27aよりも照射範囲が狭い上手側発光部23b,27bとして、最上手側の1個と次に上手側の1個との計2個の発光部を採用し、下手側発光部23c、27cとして、最下手側の1個と次に下手側の1個との計2個の発光部を採用して実施してもよい。また、上手側発光部と下手側発光部の数を相違させて実施してもよい。 (3) In the above-described embodiment, the four light emitting units 23 and 27 (line illumination devices 23 and 27) are provided, and the upper side light emitting units 23b and 27b and the lower side are narrower than the middle light emitting units 23a and 27a. Although the example which employ | adopted one light emission part as the side light emission parts 23c and 27c was shown, many light emission parts 23 and 24 are provided, and the upper side light emission parts 23b and 27b which have a narrower irradiation range than the middle light emission parts 23a and 27a are shown. As the lower side light emitting parts 23c and 27c, one on the lowermost side and one on the lower side are adopted as a total of two light emitting parts, one on the uppermost side and one on the next upper side. A total of two light emitting units, such as a single unit, may be employed. Further, the number of upper side light emitting units and lower side light emitting units may be different.
(4)上記した実施形態では、検出箇所Jに向かう側の側面に分割処理膜81が備えられた光透過体80を採用した例を示したが、図19に示すように、受光装置14A,14B,15A,15Bに向う側の側面に分割処理膜81が備えられ、検出箇所Jに向かう側の側面に反射防止膜82としてのARコートが備えられた光透過体80を採用してもよい。この場合、次の如き作用効果を備える。 (4) In the above-described embodiment, an example in which the light transmitting body 80 provided with the divided processing film 81 is provided on the side surface facing the detection location J is shown. However, as illustrated in FIG. A light transmission body 80 may be employed in which a divided processing film 81 is provided on the side surface facing the 14B, 15A, and 15B, and an AR coating as an antireflection film 82 is provided on the side surface facing the detection location J. In this case, the following operational effects are provided.
 前部側及び後部側の受光装置14A,14B,15A,15Bから検出箇所Jに向う光が、光透過体80を透過する際、分割処理膜81によって検出箇所Jに届く透過光と、検出箇所Jに届かない反射光とに分割処理されて、前部側及び後部側の受光装置14A,14B,15A,15Bから検出箇所Jに届く光が弱くなることにより、前部側及び後部側の受光装置14A,14B,15A,15Bのレンズの暗い箇所がペレットに写り込み難くい。 When the light directed from the front and rear light-receiving devices 14A, 14B, 15A, 15B to the detection point J passes through the light transmitting body 80, the transmitted light reaches the detection point J by the divided processing film 81, and the detection point The light that reaches the detection point J from the light receiving devices 14A, 14B, 15A, and 15B on the front side and the rear side is weakened by being divided into reflected light that does not reach J, so that the light reception on the front side and the rear side is reduced. The dark spots of the lenses of the devices 14A, 14B, 15A, and 15B are difficult to be reflected on the pellet.
 分割処理膜81は、検出箇所Jから前部側及び後部側の受光装置14A,14B,15A,15Bに向う光を、前部側及び後部側の受光装置14A,14B,15A,15Bに届く透過光と、前部側及び後部側の受光装置14A,14B,15A,15Bに届かない反射光とに分割処理する。しかし、反射防止膜82は、光透過体80の検出箇所Jに向かう側面での光の反射を抑制する。従って、検出箇所Jから前部側及び後部側の受光装置14A,14B,15A,15Bに向う光が分割処理膜81のために弱くなることを反射防止膜82によって抑制でき、前部側及び後部側の受光装置14A,14B,15A,15Bのレンズの暗い箇所をペレットに写り込み難くできながら、検出箇所Jから前部側及び後部側の受光装置14A,14B,15A,15Bに届く光を強くできる。 The division processing film 81 transmits light that travels from the detection point J toward the front and rear light receiving devices 14A, 14B, 15A, and 15B to the front and rear light receiving devices 14A, 14B, 15A, and 15B. The light is divided into reflected light that does not reach the front and rear light receiving devices 14A, 14B, 15A, and 15B. However, the antireflection film 82 suppresses reflection of light on the side surface of the light transmitting body 80 toward the detection point J. Therefore, it is possible to suppress the light from the detection point J toward the light receiving devices 14A, 14B, 15A, and 15B on the front side and the rear side from being weakened by the divided processing film 81 by the antireflection film 82. The light receiving devices 14A, 14B, 15A, and 15B on the side can be made difficult to be reflected on the pellet, but the light that reaches the front and rear light receiving devices 14A, 14B, 15A, and 15B from the detection location J is strongly strengthened. it can.
(5)上記した実施形態では、前記照明用光源20,24がLED発光素子を備えて構成されるものを示したが、照明用光源としては、LED発光素子に限らず、蛍光灯等の他の種類の照明用のランプを用いることができる。 (5) In the above-described embodiment, the illumination light sources 20 and 24 are configured to include LED light-emitting elements. However, the illumination light source is not limited to the LED light-emitting elements, and other fluorescent lamps or the like. These types of lighting lamps can be used.
(6)上記した実施例では、受光手段10に向けて光を投射する投射部材32,33が、LED発光素子を備えて構成されるものを示したが、投射部材としては、LED発光素子に限らず、所定の光反射率を備える反射板にて構成してもよい。 (6) In the above-described embodiment, the projection members 32 and 33 that project the light toward the light receiving means 10 are configured to include the LED light emitting elements. However, the present invention is not limited to this, and the reflector may have a predetermined light reflectance.
(7)上記した実施形態では、受光手段10として、装置横幅方向に沿って並ぶ状態で配備された2台の受光装置14A,14B,15A,15Bを備える構成としたが、検出箇所の横幅方向全幅に亘る1台の受光装置にて検出する構成としてもよい。 (7) In the above-described embodiment, the light receiving means 10 includes the two light receiving devices 14A, 14B, 15A, and 15B arranged in a line in the device width direction. It is good also as a structure detected by one light receiving device covering the whole width.
(8)上記した実施形態では、分離手段7によって異常物を飛ばして分離させるよう構成した例を示したが、正常物を分離手段によって飛ばして分離させるよう構成して実施してもよい。 (8) In the above-described embodiment, an example is shown in which the separation means 7 is configured to skip and separate abnormal objects. However, a normal object may be configured to be separated by separation means.
 本発明は、樹脂ベレットを検査対象物とする粒状体検査装置の他、籾などの各種の粒状体を検査対象物とする粒状体検査装置に利用可能である。 The present invention can be used for a granular material inspection apparatus that uses a resin beret as an inspection object, and a granular material inspection apparatus that uses various granular materials such as candy as an inspection object.
 9       照明手段
 10      受光手段 
 11      収納ケース
 12,13   受光部
 18      一方側照明手段
 19      他方側照明手段
 20,24   照明用光源
 21,25   拡散透過部材
 22,26   発光部
 23,27   ライン状照明装置
 28      照明光量調整手段
 32,33   投射部材
 34      背景光量調整手段 
 55,65   フード手段
 56、66   フード筒部
 57,67   遮光板部
 57a,67a 反射部
 80      光透過体
 81      分割処理膜
 82      反射防止膜
 IK      移動落下経路
 J       検出箇所
 k       粒状体群(ペット群)
 S       移送手段
 Q       凸状曲面
 R1,R2   受光経路
9 Illuminating means 10 Light receiving means
DESCRIPTION OF SYMBOLS 11 Storage case 12, 13 Light-receiving part 18 One side illumination means 19 Other side illumination means 20, 24 Illumination light source 21, 25 Diffuse transmission member 22, 26 Light emission part 23, 27 Line-shaped illumination apparatus 28 Illumination light quantity adjustment means 32, 33 Projection member 34 Background light amount adjustment means
55, 65 Hood means 56, 66 Hood cylinder portion 57, 67 Light shielding plate portion 57a, 67a Reflecting portion 80 Light transmitting body 81 Split processing film 82 Antireflection film IK Moving fall path J Detection location k Granular body group (pet group)
S transfer means Q convex curved surface R1, R2 light receiving path

Claims (18)

  1.  検査対象物としての粒状体群を検出箇所を通過させるように移送する移送手段と、
     前記検出箇所を照明する照明手段と、
     前記検出箇所からの光を受光する受光手段と、
     前記受光手段の受光量が正常物に対応する適正光量範囲を外れているか否かにより正常物であるか異常物であるかを判別する判別手段とを備え、
     前記照明手段が、照明用光源と、その照明用光源から前記検出箇所に向けて出射された光を拡散光として透過させる拡散透過部材とを備えて構成され、
     前記照明手段が、
     前記拡散透過部材を前記検出箇所から離れる外方側に向けて凸状に湾曲する凸状曲面に形成する状態で備えるとともに、前記照明用光源を前記拡散透過部材よりも前記外方側の箇所に前記凸状曲面に沿って位置する状態で備えて構成されている粒状体検査装置。
    Transfer means for transferring the granular material group as the inspection object so as to pass through the detection point; and
    Illuminating means for illuminating the detection location;
    A light receiving means for receiving light from the detection location;
    A determination means for determining whether the light receiving amount of the light receiving means is normal or abnormal depending on whether or not the amount of received light is outside an appropriate light amount range corresponding to a normal object,
    The illumination means includes an illumination light source, and a diffusion transmission member configured to transmit light emitted from the illumination light source toward the detection location as diffuse light,
    The illumination means is
    The diffuse transmission member is provided in a state of forming a convex curved surface that curves convex toward the outer side away from the detection location, and the illumination light source is provided at a location on the outer side than the diffusion transmission member. A granular material inspection apparatus provided and configured in a state of being positioned along the convex curved surface.
  2.  前記照明用光源が、前記凸状曲面に沿って並ぶ状態で複数の発光部を備えて構成され、
     前記複数の発光部の光量を夫々各別に変更調整自在な光量調整装置が備えられている請求項1記載の粒状体検査装置。
    The illumination light source is configured to include a plurality of light emitting units in a state of being arranged along the convex curved surface,
    The granular material inspection apparatus according to claim 1, further comprising a light amount adjusting device capable of changing and adjusting the light amounts of the plurality of light emitting units.
  3.  前記移送手段が、前記粒状体群を一層状態で且つ横幅方向に広がった状態で移動落下経路に沿って移送するとともに、前記移動落下経路の途中に横幅方向に沿って延びる状態で設けられた前記検出箇所を通過させるように構成され、
     前記照明手段が、前記移動落下経路の一方側に備えられる一方側照明手段と、前記移動落下経路の他方側に備えられる他方側照明手段とを備えて構成され、
     前記一方側照明手段における前記拡散透過部材が、前記検出箇所から一方側外方に向けて凸状に湾曲する前記凸状曲面を有し且つ前記横幅方向に向かって延びる略半円筒状に構成され、
     前記他方側照明手段における前記拡散透過部材が、前記検出箇所から他方側外方に向けて凸状に湾曲する前記凸状曲面を有し且つ前記横幅方向に向かって延びる略半円筒状に構成されている請求項1又は2記載の粒状体検査装置。
    The transfer means is provided in a state where the granular material group is transferred in a single layer state and spread in the horizontal width direction along the moving drop path, and is extended in the horizontal width direction in the moving drop path. Configured to pass through the detection points,
    The illumination means is configured to include one side illumination means provided on one side of the moving fall path and the other side illumination means provided on the other side of the movement fall path,
    The diffuse transmission member in the one-side illuminating means has a substantially semi-cylindrical shape that has the convex curved surface that curves convexly from the detection location toward one side outward and extends in the lateral width direction. ,
    The diffuse transmission member in the other-side illumination means has a substantially semi-cylindrical shape having the convex curved surface that curves convexly from the detection location toward the other side and extending in the lateral width direction. The granular material inspection apparatus according to claim 1 or 2.
  4.  前記照明用光源における前記凸状曲面に沿って並ぶ状態で備えられる複数の発光部が、前記検出箇所の前記横幅方向に沿う幅と同じ又は略同じ幅を備える状態で前記横幅方向に長尺のライン状照明装置にて構成されている請求項3記載の粒状体検査装置。 A plurality of light emitting units provided in a state of being arranged along the convex curved surface in the illumination light source is long in the horizontal width direction in a state of having the same or substantially the same width as the width of the detection location along the horizontal width direction. The granular material inspection apparatus according to claim 3, wherein the granular object inspection apparatus is configured by a line-shaped illumination device.
  5.  前記受光手段の受光方向における前記検出箇所の前記受光手段とは反対側箇所から前記受光手段に向けて光を投射する投射部材と、
     この投射部材の光量を変更調整自在な光量調整手段とが備えられている請求項1~4のいずれか1項に記載の粒状体検査装置。
    A projection member that projects light toward the light receiving means from a position opposite to the light receiving means of the detection position in the light receiving direction of the light receiving means;
    The granular material inspection apparatus according to any one of claims 1 to 4, further comprising a light amount adjusting means capable of changing and adjusting a light amount of the projection member.
  6.  検査対象物としての粒状体群を検出箇所を通過させるように移送する移送手段と、
     前記検出箇所を照明する照明手段と、
     前記検出箇所からの光を受光する受光部を有した受光手段と、
     前記受光部の受光量が正常物に対応する適正光量範囲を外れているか否かにより正常物であるか異常物であるかを判別する判別手段とを備え、
     前記照明手段が、照明用光源と、その照明用光源から前記検出箇所に向けて出射された光を拡散光として透過させる拡散透過部材とを備えて構成され、
     前記拡散透過部材を前記検出箇所から離れる外方側に向けて凸状に湾曲する凸状曲面に形成した状態で備え、
     前記照明用光源を前記拡散透過部材よりも前記外方側の箇所に前記凸状曲面に沿って位置する状態で備え、
     前記受光部が前記検出箇所から受光するための受光経路に、前記検出箇所に向かう入射光を反射光と透過光とに分割処理する分割処理膜が備えられた光透過体を設けてある粒状体検査装置。
    Transfer means for transferring the granular material group as the inspection object so as to pass through the detection point; and
    Illuminating means for illuminating the detection location;
    A light receiving means having a light receiving portion for receiving light from the detection location;
    A determination means for determining whether the light receiving amount of the light receiving unit is normal or abnormal depending on whether or not the appropriate light amount range corresponding to the normal object is out,
    The illumination means includes an illumination light source, and a diffusion transmission member configured to transmit light emitted from the illumination light source toward the detection location as diffuse light,
    The diffuse transmission member is provided in a state where it is formed in a convex curved surface that curves convexly toward the outer side away from the detection location,
    The illumination light source is provided in a state located along the convex curved surface at a location on the outer side than the diffuse transmission member,
    A granular body provided with a light transmitting body provided with a split processing film for splitting incident light directed to the detection spot into reflected light and transmitted light in a light receiving path for receiving light from the detection spot. Inspection device.
  7.  検査対象物としての粒状体群を検出箇所を通過させるように移送する移送手段と、
     前記検出箇所を照明する照明手段と、
     前記検出箇所からの光を受光する受光部を有する受光手段と、
     前記受光部の受光量が正常物に対応する適正光量範囲を外れているか否かにより正常物であるか異常物であるかを判別する判別手段とが備えられ、
     前記照明手段が、照明用光源と、その照明用光源から前記検出箇所に向けて出射された光を拡散光として透過させる拡散透過部材とを備え、
     前記拡散透過部材を前記検出箇所から離れる外方側に向けて凸状に湾曲する凸状曲面に形成した状態で備え、
     前記照明用光源を前記拡散透過部材よりも前記外方側の箇所に前記凸状曲面に沿って位置する状態で備え、
     前記受光部と前記拡散透過部材との間に、前記受光部のためのレンズフード手段を設けてある粒状体検査装置。
    Transfer means for transferring the granular material group as the inspection object so as to pass through the detection point; and
    Illuminating means for illuminating the detection location;
    A light receiving means having a light receiving portion for receiving light from the detection location;
    And a discriminating means for discriminating whether the received light amount of the light receiving unit is normal or abnormal depending on whether or not the appropriate light amount range corresponding to the normal object is outside,
    The illumination means includes an illumination light source, and a diffusion transmission member that transmits light emitted from the illumination light source toward the detection location as diffuse light,
    The diffuse transmission member is provided in a state where it is formed in a convex curved surface that curves convexly toward the outer side away from the detection location,
    The illumination light source is provided in a state located along the convex curved surface at a location on the outer side than the diffuse transmission member,
    A granular material inspection apparatus in which lens hood means for the light receiving part is provided between the light receiving part and the diffuse transmission member.
  8.  検査対象物としての粒状体群を検出箇所を通過させるように移送する移送手段と、
     前記検出箇所を照明する照明手段と、
     前記検出箇所からの光を受光する受光部を有した受光手段と、
     前記受光部の受光量が正常物に対応する適正光量範囲を外れているか否かにより正常物であるか異常物であるかを判別する判別手段とを備え、
     前記照明手段が、照明用光源と、その照明用光源から前記検出箇所に向けて出射された光を拡散光として透過させる拡散透過部材とを備えて構成され、
     前記拡散透過部材を前記検出箇所から離れる外方側に向けて凸状に湾曲する凸状曲面に形成した状態で備え、
     前記照明用光源を前記拡散透過部材よりも前記外方側の箇所に前記凸状曲面に沿って位置する状態で備え、
     前記受光部が前記検出箇所から受光するための受光経路に、前記検出箇所に向かう入射光を反射光と透過光とに分割処理する分割処理膜が備えられた光透過体を設け、
     前記受光部と前記拡散透過部材との間に、前記受光部のためのレンズフード手段を設けてある粒状体検査装置。
    Transfer means for transferring the granular material group as the inspection object so as to pass through the detection point; and
    Illuminating means for illuminating the detection location;
    A light receiving means having a light receiving portion for receiving light from the detection location;
    A determination means for determining whether the light receiving amount of the light receiving unit is normal or abnormal depending on whether or not the appropriate light amount range corresponding to the normal object is out,
    The illumination means includes an illumination light source, and a diffusion transmission member configured to transmit light emitted from the illumination light source toward the detection location as diffuse light,
    The diffuse transmission member is provided in a state where it is formed in a convex curved surface that curves convexly toward the outer side away from the detection location,
    The illumination light source is provided in a state located along the convex curved surface at a location on the outer side than the diffuse transmission member,
    In the light receiving path for the light receiving unit to receive light from the detection location, a light transmitting body provided with a split processing film that splits incident light toward the detection location into reflected light and transmitted light is provided,
    A granular material inspection apparatus in which lens hood means for the light receiving part is provided between the light receiving part and the diffuse transmission member.
  9.  前記光透過体の前記検出箇所に向う側の側面に前記分割処理膜が備えられ、前記光透過体の前記受光部に向う側の側面に反射防止膜が備えられている請求項6又は8に記載の粒状体検査装置。 The said division process film | membrane is provided in the side surface of the said light transmission body which faces the said detection location, The antireflection film is provided in the side surface of the said light transmission body which faces the said light-receiving part. Granule inspection device.
  10.  前記レンズフード手段が、前記受光経路が通るフード筒部と、前記フード筒部の外周囲の前記受光部と前記照明用光源との間の箇所に位置する遮光板部とを備えて構成されている請求項7又は8に記載の粒状体検査装置。 The lens hood means includes a hood tube portion through which the light receiving path passes, and a light shielding plate portion positioned at a position between the light receiving portion and the illumination light source on the outer periphery of the hood tube portion. The granular material inspection apparatus according to claim 7 or 8.
  11.  前記遮光板部に、前記検出箇所に向かう反射光を発生させる反射部を備えてある請求項10に記載の粒状体検査装置。 The granular material inspection apparatus according to claim 10, wherein the light-shielding plate portion includes a reflection portion that generates reflected light toward the detection location.
  12.  前記照明用光源、前記拡散透過部材及び前記受光部それぞれの一対が、検査対象物が移動落下する移動落下経路のうちの前記検出箇所を含む部位を挟む状態で配備されている請求項6~11のいずれか一項に記載の粒状体検査装置。 A pair of each of the illumination light source, the diffusing and transmitting member, and the light receiving unit is arranged in a state of sandwiching a portion including the detection location in a moving drop path along which an inspection object moves and drops. The granular material inspection apparatus as described in any one of.
  13.  検査対象物としての粒状体群を検出箇所を通過させるように移送する移送手段と、
     前記検出箇所を照明する照明手段と、
     前記検出箇所からの光を受光する受光手段と、
     前記受光手段の受光量が正常物に対応する適正光量範囲を外れているか否かにより正常物であるか異常物であるかを判別する判別手段とを備え、
     前記照明手段が、照明用光源と、その照明用光源から前記検出箇所に向けて出射された光を拡散光として透過させる拡散透過部材とを備えて構成され、
     前記拡散透過部材を前記検出箇所から離れる外方側に向けて凸状に湾曲する凸状曲面に形成した状態で備え、
     前記照明用光源を前記拡散透過部材よりも前記外方側の箇所に前記凸状曲面に沿って位置する状態で備え、
     検査対象物が移動落下する移動落下経路のうちの前記検出箇所を含む部位の横側方に位置する箇所であって、前記受光手段の受光方向に交差する方向での前記拡散透過部材の横側方に位置する箇所に、前記検出箇所に向かう反射光を発生させる反射部材を設けてある粒状体検査装置。
    Transfer means for transferring the granular material group as the inspection object so as to pass through the detection point; and
    Illuminating means for illuminating the detection location;
    A light receiving means for receiving light from the detection location;
    A determination means for determining whether the light receiving amount of the light receiving means is normal or abnormal depending on whether or not the amount of received light is outside an appropriate light amount range corresponding to a normal object,
    The illumination means includes an illumination light source, and a diffusion transmission member configured to transmit light emitted from the illumination light source toward the detection location as diffuse light,
    The diffuse transmission member is provided in a state where it is formed in a convex curved surface that curves convexly toward the outer side away from the detection location,
    The illumination light source is provided in a state located along the convex curved surface at a location on the outer side than the diffuse transmission member,
    Of the moving and dropping path along which the inspection object moves and falls, it is a location located on the lateral side of the portion including the detection location, and the lateral side of the diffuse transmission member in a direction intersecting the light receiving direction of the light receiving means The granular material inspection apparatus which has provided the reflective member which generates the reflected light which goes to the said detection location in the location located in the direction.
  14.  検査対象物としての粒状体群を検出箇所を通過させるように移送する移送手段と、
     前記検出箇所を照明する照明手段と、
     前記検出箇所からの光を受光する受光手段と、
     前記受光手段の受光量が正常物に対応する適正光量範囲を外れているか否かにより正常物であるか異常物であるかを判別する判別手段とを備え、
     前記照明手段が、照明用光源と、その照明用光源から前記検出箇所に向けて出射された光を拡散光として透過させる拡散透過部材とを備えて構成され、
     前記拡散透過部材を前記検出箇所から離れる外方側に向けて凸状に湾曲する凸状曲面に形成する状態で備え、
     前記照明用光源が、前記拡散透過部材よりも前記外方側の箇所に前記凸状曲面に沿う状態で、かつ検査対象物が移動落下する移動落下経路のうちの前記検出箇所を含む部位における検査対象物の移動方向に並ぶ状態で複数の発光部を備えて構成され、
     前記複数の発光部のうちの検査対象物移動方向上手側に位置する上手側発光部、及び検査対象物移動方向下手側に位置する下手側発光部の照射範囲を、前記複数の発光部のうちの前記上手側発光部と前記下手側発光部との間に位置する中発光部の照射範囲よりも狭く設定してある粒状体検査装置。
    Transfer means for transferring the granular material group as the inspection object so as to pass through the detection point; and
    Illuminating means for illuminating the detection location;
    A light receiving means for receiving light from the detection location;
    A determination means for determining whether the light receiving amount of the light receiving means is normal or abnormal depending on whether or not the amount of received light is outside an appropriate light amount range corresponding to a normal object,
    The illumination means includes an illumination light source, and a diffusion transmission member configured to transmit light emitted from the illumination light source toward the detection location as diffuse light,
    The diffusing and transmitting member is provided in a state of forming a convex curved surface that curves convexly toward the outer side away from the detection location,
    Inspection at a part including the detection point in a moving and falling path along which the inspection object moves and falls in a state where the light source for illumination is along the convex curved surface at a part on the outer side of the diffuse transmission member. It is configured with a plurality of light emitting units in a state aligned in the moving direction of the object,
    Among the plurality of light emitting units, the irradiation range of the upper side light emitting unit located on the upper side of the inspection object moving direction and the lower side light emitting unit located on the lower side of the inspection object moving direction among the plurality of light emitting units. The granular material inspection apparatus which is set narrower than the irradiation range of the middle light emitting part located between the upper light emitting part and the lower light emitting part.
  15.  検査対象物としての粒状体群を検出箇所を通過させるように移送する移送手段と、
     前記検出箇所を照明する照明手段と、
     前記検出箇所からの光を受光する受光手段と、
     前記受光手段の受光量が正常物に対応する適正光量範囲を外れているか否かにより正常物であるか異常物であるかを判別する判別手段とを備え、
     前記照明手段が、照明用光源と、その照明用光源から前記検出箇所に向けて出射された光を拡散光として透過させる拡散透過部材とを備えて構成され、
     前記拡散透過部材を前記検出箇所から離れる外方側に向けて凸状に湾曲する凸状曲面に形成した状態で備え、
     検査対象物が移動落下する移動落下経路のうちの前記検出箇所を含む部位の横側方に位置する箇所であって、前記受光手段の受光方向に交差する方向での前記拡散透過部材の横側方に位置する箇所に、前記検出箇所に向かう反射光を発生させる反射部材を設け、
     前記照明用光源が、前記拡散透過部材よりも前記外方側の箇所に前記凸状曲面に沿う状態で、かつ前記移動落下経路の部位における検査対象物の移動方向に並ぶ状態で複数の発光部を備えて構成され、
     前記複数の発光部のうちの検査対象物移動方向上手側に位置する上手側発光部、及び検査対象物移動方向下手側に位置する下手側発光部の照射範囲を、前記複数の発光部のうちの前記上手側発光部と前記下手側発光部との間に位置する中発光部の照射範囲よりも狭く設定してある粒状体検査装置。
    Transfer means for transferring the granular material group as the inspection object so as to pass through the detection point; and
    Illuminating means for illuminating the detection location;
    A light receiving means for receiving light from the detection location;
    A determination means for determining whether the light receiving amount of the light receiving means is normal or abnormal depending on whether or not the amount of received light is outside an appropriate light amount range corresponding to a normal object,
    The illumination means includes an illumination light source, and a diffusion transmission member configured to transmit light emitted from the illumination light source toward the detection location as diffuse light,
    The diffuse transmission member is provided in a state where it is formed in a convex curved surface that curves convexly toward the outer side away from the detection location,
    Of the moving and dropping path along which the inspection object moves and falls, it is a location located on the lateral side of the portion including the detection location, and the lateral side of the diffuse transmission member in a direction intersecting the light receiving direction of the light receiving means In a location located on the side, a reflection member that generates reflected light toward the detection location is provided,
    A plurality of light emitting units in a state in which the illumination light source is in a state along the convex curved surface at a location on the outer side of the diffusing and transmissive member, and aligned in the moving direction of the inspection object in the moving drop path portion Configured with
    Among the plurality of light emitting units, the irradiation range of the upper side light emitting unit located on the upper side of the inspection object moving direction and the lower side light emitting unit located on the lower side of the inspection object moving direction among the plurality of light emitting units. The granular material inspection apparatus which is set narrower than the irradiation range of the middle light emitting part located between the upper light emitting part and the lower light emitting part.
  16.  前記照明手段、前記拡散透過部材、及び前記移動落下経路の部位を収納する収納ケースを備え、
     前記反射部材を、前記収納ケースにおける側部カバーと前記移動落下経路の部位との間に配備してある請求項13又は15に記載の粒状体検査装置。
    A storage case for storing the illumination means, the diffuse transmission member, and the part of the moving drop path;
    The granular material inspection apparatus according to claim 13 or 15, wherein the reflection member is disposed between a side cover in the storage case and a portion of the moving drop path.
  17.  前記検出箇所の下方に、前記検出箇所からの検査対象物を正常物と異常物とに分離させ、分離した異常物又は正常物を飛ばす分離手段を設け、
     前記分離手段の上方に、前記検出箇所に向かう反射光を発生させる下第1反射部材を設けてある請求項13~16のいずれか一項に記載の粒状体検査装置。
    Below the detection location, separating the inspection object from the detection location into normal and abnormal materials, and providing separation means for flying the separated abnormal materials or normal materials,
    The granular material inspection apparatus according to any one of claims 13 to 16, wherein a lower first reflecting member that generates reflected light toward the detection location is provided above the separating means.
  18.  前記検出箇所の下方に、前記分離手段によって飛ばされた異常物又は正常物を回収部に落下するよう案内する案内体を設け、
     前記案内体の上方に、前記検出箇所に向かう反射光を発生させる下第2反射部材を設けてある請求項16に記載の粒状体検査装置。
    Provided below the detection location is a guide body that guides the abnormal object or normal object that has been blown off by the separating means to fall into the recovery unit,
    The granular material inspection apparatus according to claim 16, wherein a lower second reflecting member that generates reflected light toward the detection location is provided above the guide body.
PCT/JP2012/078998 2011-11-09 2012-11-08 Granule inspection device WO2013069736A1 (en)

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