JP5463201B2 - Surface inspection equipment for cylindrical parts - Google Patents

Description

  The present invention relates to a surface inspection apparatus for a cylindrical part, and more specifically, a desired part of a surface of a cylindrical part formed in a cylindrical shape, such as an outer peripheral surface, an inner peripheral surface, and an end surface, is imaged by a camera. The present invention relates to a surface inspection apparatus for a cylindrical part that inspects whether the surface of the cylindrical part is damaged by processing such as a scratch or a dent.

  In various cylindrical parts such as cylindrical metal processed parts formed by pressing, forging, cutting, etc., and cylindrical resin molded parts formed by injection molding, etc. In some cases, the inner peripheral surface, the end surface, etc. are inspected for damage such as scratches or dents.

  Here, in recent years, so-called “image processing” technology has been developed in which an image captured by a camera is processed by a computer, and it can be assumed that the above-described inspection is performed by image processing. In addition, when inspection of the surface of a cylindrical part is performed by image processing, it is convenient to take an image of an appropriate part of the surface with a camera while rotating the cylindrical part, and rotation that supports and rotates the cylindrical part It is possible to envisage a surface inspection device in which a support device is created and cameras are installed in front of and behind the rotation support device and in the vicinity of the left and right.

  However, the following problems arise in a surface inspection apparatus in which a camera is simply installed in the vicinity of a rotating support device for cylindrical parts.

  When it is desired to inspect a plurality of parts such as an outer peripheral surface, an inner peripheral surface, and an end face on the surface of the cylindrical part, a plurality of surface inspection apparatuses with different parts to be photographed by a camera are necessary. And, in order to inspect a plurality of parts on the surface of the cylindrical part by the plurality of surface inspection devices in this way, the cylindrical parts are put into the rotation support device individually for each surface inspection device, The operation of taking out the cylindrical part is required, and the entire inspection operation becomes complicated.

  This invention is made | formed in view of the said actual condition, and makes it a subject to provide the novel surface inspection apparatus which can test | inspect the some site | part of a cylindrical component surface by throwing in a cylindrical component once.

The main means taken by the present invention to solve the above problems are as follows:
"With the base,
It includes at least a loading stage for loading cylindrical parts, a plurality of imaging stages for photographing a predetermined part of the surface of the cylindrical parts with a camera, and an extraction stage for taking out the cylindrical parts, and is disposed around the base. Multiple stages,
A pair of rollers arranged in parallel so that the respective rotation axes are parallel to each other, and the roller between the pair of rollers in a state where the outer peripheral surface of the roller is in contact with the outer peripheral surface of the cylindrical part the cylindrical part is placed on the outer peripheral surface of the roller unit to rotate the cylindrical component by rotation of the roller, but is more arranged at predetermined angular intervals on the same circumference, rotates in a horizontal direction to the base A component conveyor that is freely supported and rotationally driven to move the cylindrical component placed on the roller unit between the stages;
The roller unit has a roller contact portion disposed below the roller unit and in contact with the outer peripheral surface of the roller. The roller base is rotatably supported on the base by the same rotation axis as the component conveying board and is driven to rotate. A roller drive board that rotates the roller by the roller contact portion ,
A cylindrical part surface inspection device characterized in that the rotating shaft of the roller is inclined upward toward the inside of the parts conveying board. "
It is.

  In the surface inspection apparatus having the above-described configuration, the roller unit corresponds to a rotation support device that supports and rotates the cylindrical component, and a plurality of roller units are provided on the component conveyance board at predetermined angular intervals on the same circumference. It has been. The component conveying board rotates to move the cylindrical component supported by the roller unit between a plurality of stages such as an input stage, an imaging stage, and an extraction stage. Therefore, in this surface inspection apparatus, when a cylindrical part is put into the roller unit at the charging stage and the parts conveying board is rotated, the cylindrical parts put on the charging stage are changed to different parts on the surface of the cylindrical part. Can be sequentially moved to a plurality of imaging stages, and a desired part can be imaged at each imaging stage and finally moved to an extraction stage.

  Therefore, according to the surface inspection apparatus having the above configuration, it is possible to inspect a plurality of parts on the surface of the cylindrical part by inputting the cylindrical part once.

  In the surface inspection apparatus having the above-described configuration, the roller unit that supports and rotates the cylindrical component is configured by using a pair of rollers having a rotation axis in parallel, and the cylindrical component is mounted between the rollers. Since the cylindrical part is supported by rotating and the cylindrical part is rotated by rotating each roller, the following advantages can be obtained.

  In order to support and rotate the cylindrical part, a gripping tool that holds the cylindrical part or a holding tool that is held by externally or internally fitting the cylindrical part is used. A rotation support device that is driven to rotate can be assumed. However, in such a rotation support device, a portion that is hidden by a gripping tool or a holder and cannot be photographed by a camera is likely to be generated, and a single rotation support device is photographed at a different portion. It is difficult to share with multiple shooting stages.

  On the other hand, in the roller unit configured as described above, the cylindrical part is placed between the pair of rollers and rotated, so that the portion hidden by the roller is exposed by the rotation of the cylindrical part itself. Therefore, the entire surface of the cylindrical part can be exposed so as to be photographed by the camera, and a single roller unit can be shared in a plurality of photographing stages having different parts to be photographed.

  Further, in the surface inspection apparatus having the above configuration, the roller is rotated by bringing the roller contact portion of the roller driving plate rotating on the same rotation axis as the component conveying plate into contact with the outer peripheral surface of each roller of the roller unit. Such advantages can be obtained.

  In order to rotate the rollers of the roller unit, it can be assumed that each roller unit in the individual roller unit of the component transport board is rotated by an individual rotation driving device. A drive device must be mounted, and the entire device becomes a large structure. Moreover, when it is going to change the rotational speed of a roller according to the kind of cylindrical components, many rotation drive devices must be adjusted individually and it is inferior to usability.

  On the other hand, in the roller unit configured as described above, each roller is driven to rotate by the rotation of the roller drive board, so that an individual rotation drive device is required to rotate each roller in each roller unit of the component transport board. Instead, the overall structure of the apparatus can be simplified. Further, by adjusting the rotation speed of the roller drive board, the rotation speed can be adjusted for all the rollers of the roller units at once, and the usability can be improved.

In the means described above,
“The roller contact portion of the rotating disk is made of an elastic material having a circular cross section.”
Is preferable.

  The roller of the roller unit is rotationally driven by the outer peripheral surface coming into contact with the roller contact portion of the rotating roller driving plate. In other words, the roller unit contacts the outer peripheral surface by the roller contact portion of the roller driving plate that moves relative to the roller. The roller contact portion is made of elastic material such as rubber, elastomer, foamed resin, etc., so that the roller contact portion is elastically deformed by the pressing force of the contacting roller. Therefore, an appropriate contact resistance can be given to the outer peripheral surface of the roller by the elastically deformed roller contact portion.

  In addition, by making the elastic material constituting the roller contact portion into a circular cross section, the contact surface in contact with the roller is greatly changed by a slight change in the pressing force of the roller. Therefore, a contact resistance can be favorably given to the outer peripheral surface of the roller by the roller contact portion.

In the means described above,
“A surface inspection apparatus for cylindrical parts, wherein the rotation shaft of the roller is inclined upward toward the inside of the parts conveying board”
It shall be the.

  Since the roller unit is for placing a cylindrical part between a pair of rollers arranged side by side, when the rotation axis of the roller is inclined with respect to the horizontal, the cylindrical part placed between the rollers Is applied with the force of sliding down on the outer peripheral surface of the roller by its own weight. Therefore, if the further movement of the cylindrical part that slides down due to its own weight is restricted, it can be accurately positioned on the outer peripheral surface of the roller. For example, the cylindrical part abuts against the end face of the cylindrical part (in the case where the cylindrical part has a flange, a stepped part, etc., the end face of the flange or the stepped part etc.). If the roller itself is provided with a restricting portion that restricts further downward movement, the cylindrical part can be accurately positioned with a simple structure. Therefore, in this respect, it is preferable to incline the rotating shaft of the roller with respect to the horizontal.

  By the way, when the rotation axis of the roller is inclined with respect to the horizontal, if the rotation axis of the roller is inclined upward toward the outside of the component transport board, the component can be used when photographing the inner peripheral surface of the cylindrical component with a camera. A camera must be installed outside the transport board. This is because it is difficult to install a camera inside the component transport board due to interference between the component transport board itself and the roller unit. Therefore, in the aspect in which the rotation shaft of the roller is inclined upward toward the outside of the component conveying board, the degree of freedom of camera installation is low.

  In addition, even if there is a request for photographing the end surface near the inner side of the component transport board with the camera from the axial direction of the cylindrical part on the surface of the cylindrical part, the end surface near the inner side of the component transport board of the cylindrical part faces downward. For this reason, the parts conveyance board itself and the roller unit interfere with each other, so that the camera cannot be installed and the above-mentioned demand may not be met.

  On the other hand, if the rotation axis of the roller is inclined upward toward the inside of the component transport board, the end surface closer to the inside of the component transport board will be upward in the cylindrical part placed between the rollers. By installing a camera above the inside of the component transport board, it is possible to photograph the inner peripheral surface of the cylindrical part and the end surface near the inside of the component transport board. Therefore, by tilting the rotating shaft of the roller upward toward the inside of the component conveying board, it is possible to increase the degree of freedom of installation of the camera, and it is possible to meet various demands regarding the part to be imaged.

  As described above, according to the present invention, it is possible to provide a novel surface inspection apparatus capable of inspecting a plurality of portions on the surface of a cylindrical part by inserting the cylindrical part once.

It is a section front view of the surface inspection device concerning the present invention. It is a top view of the surface inspection apparatus shown in FIG. It is an enlarged view of the roller unit part of FIG. It is a partial section top view showing a roller corresponding to cylindrical parts of various shapes. It is explanatory drawing which shows the state which mounted cylindrical parts between the rollers of a roller unit.

  An example of an embodiment of a surface inspection apparatus for cylindrical parts according to the present invention will be described below in detail with reference to the drawings.

  As shown in FIGS. 1 and 2, the surface inspection apparatus according to the present invention includes a component conveying apparatus 100 installed in a frame F (detailed illustration is omitted) that constitutes a casing of the entire surface inspection apparatus, and a frame F. A plurality of stages S1 to S10 including at least an input stage, a plurality of photographing stages, and a take-out stage installed in the apparatus.

  The parts conveying apparatus 100 moves the thrown cylindrical parts between the stages S1 to S10. The base 10 and the roller driving board 20 supported by the base 10 so as to be rotatable in the horizontal direction. And a parts conveying board 30 supported on the base 10 so as to be rotatable in the horizontal direction. Here, the rotation axis of the roller drive board 20 and the rotation axis of the component conveying board 30 are set to be the same.

  The base 10 includes a base 11 and a cylindrical body 12 that is erected on the base 11, and is erected and fixed to a central portion of the frame F.

  The roller drive board 20 includes an annular drive board body 21 and a pulley 22 assembled below the drive board body 21, and the pulley 22 is attached to the cylindrical body 12 of the base 10 via a bearing B <b> 2. It is supported rotatably. The roller drive board 20 is rotationally driven via a belt (not shown) wound around the pulley 22 by a drive device (not shown) such as a motor provided on the frame F. In order to rotationally drive the roller drive board 20, not only the pulley 22 and the belt but also a sprocket, a chain, or a gear may be used.

  The component transport board 30 includes a main shaft 31 that is rotatably supported on the cylindrical body 12 of the base 10 via a bearing B <b> 1, and a disc-shaped transport board main body 34 that is assembled to the upper portion of the main shaft 31. Yes. Here, the conveyance board main body 34 includes a bush 33 on the inner side, and is assembled to the main shaft 31 via the bush 33. Further, the transport board main body 34 includes an annular unit board 35 on which the roller unit 40 is assembled.

  In addition, the component conveying board 30 has a pulley 32 assembled to the lower part of the main shaft 31, and a belt (not shown) wound around the pulley 32 by a driving device (not shown) such as a motor provided on the frame F. (Not shown). In order to rotationally drive the component conveying board 30, not only the pulley 32 and the belt but also a sprocket, a chain, or a gear may be used.

  As shown in FIGS. 2 and 3, the roller unit 40 includes a bracket 42 attached to the unit board 35 on the outer peripheral edge of the transport board body 34, and the bracket 42 is freely rotatable via a roller shaft 44 and a bearing B <b> 3. And two rollers 41 assembled to each other. In this example, one end side of each roller shaft 44 of the pair of rollers 41 is fixed to the bracket 42, but the other end side of each roller shaft 44 is also fixed to the connecting bracket 43 and integrated. The mounting structure of the pair of rollers 41 is a rigid structure in which the distance between the pair of rollers 41 does not unintentionally widen or narrow.

  The rotation axes of the rollers 41 are parallel to each other across a reference line extending radially from the rotation center of the component transport board 30. Further, the rotation shaft of each roller 41 is inclined upward toward the inside of the component conveying board 30. Furthermore, as shown in FIG. 5, the distance between the pair of rollers 41 is set so that the cylindrical part W can be placed between the rollers 41. Specifically, the dimension S between the outer peripheral surfaces of the pair of rollers 41 is set to be slightly narrower than the outer diameter dimension G of the portion of the cylindrical component W placed between the rollers 41. The cylindrical part W can be stably placed between them.

  As shown in FIG. 4, the roller 41 of the roller unit 40 has a shape corresponding to the type of the cylindrical part W. For example, as shown in FIG. In the case where the portion has a flange Wa, the upward end surface 41a of the roller 41 whose rotation axis is inclined (the end surface on the inner side of the component transport board 30) is brought into contact with the flange Wa of the cylindrical component W. As a contact portion for positioning the cylindrical part W, the cylindrical part W can be accurately positioned and held. Further, as shown in FIG. 4B, when the cylindrical component W has a stepped portion Wb, the lower side of the roller 41 whose inclination is inclined (outside of the component conveying board 30). A large-diameter portion 41b is provided on the outer peripheral surface, and the large-diameter portion 41b is used as an abutting portion for abutting the stepped portion Wb of the cylindrical component W to position the cylindrical component W, thereby accurately positioning the cylindrical component W. Can be held.

  In order to make the component conveying apparatus 100 compatible with various types of cylindrical parts W, the individual rollers 41 may be replaced or the individual roller units 40 may be replaced according to the types of the cylindrical parts W. However, the unit board 35 on which a large number of roller units 40 are attached can be attached to and detached from the parts transport board 30 so that the unit board 35 can be replaced to cope with various cylindrical parts W. Then, the exchange work for corresponding to the cylindrical part W to be inspected can be simplified.

  As described above, the roller unit 40 is configured to place the cylindrical member W between the pair of rollers 41, but also rotates the cylindrical member W by the rotation of the roller 41. As shown, in the component conveying device 100, a ring-shaped roller contact portion that rotates and drives the roller 41 in contact with the outer peripheral surface of the roller 41 is provided along the outer peripheral edge portion of the roller driving board 20. .

  Here, the roller contact portion may be constituted by a part of the roller drive board 20 itself, such as the outer peripheral edge part of the roller drive board 20, but in this example, a circle is formed on the upper surface of the outer peripheral edge part of the roller drive board 20. An annular mounting plate 23 is attached, and a contact member 24 is mounted on the mounting plate 23, and a roller contact portion is configured by the contact member 24. An annular presser plate 25 is attached to the upper surface of the mounting plate 23 so that a part of the contact member 24 is exposed, and the contact member 24 is not between the mounting plate 23 and the presser plate 25. It is firmly fixed so that it does not fall off.

  In this example, the roller 41 is made of metal, whereas the contact member 24 is made of an elastic material such as rubber, elastomer, or foamed resin having a circular cross section. As a result, the contact member 24 can be elastically deformed moderately by the pressing force of the roller 41, and the roller 41 can be driven to rotate favorably by giving an appropriate contact resistance to the roller 41 by the rotation of the roller drive board 20. .

  By the way, as shown in FIG.1 and FIG.2, several stage S1-10 provided in the flame | frame F is installed around the base 10 of the components conveyance apparatus 100, and the roller of the components conveyance apparatus 100 is used. The cylindrical component supported by the unit 40 moves between the stages S1 to S10 by the rotation of the component conveying board 30. And each roller unit 40 stops rotation of the component conveyance board 30 in the position corresponding to each stage S1-10, and the process in each stage S1-10 is performed to a cylindrical component. Here, if the roller driving board 20 is rotated, the roller 41 of the roller unit 40 is rotated in accordance with the rotation of the roller driving board 20, so that the cylindrical component placed on the roller unit 40 can be rotated. it can.

  If the roller drive board 20 is always rotated at a constant speed, the cylindrical component placed on the roller unit 40 can be rotated in a state where the roller unit 40 is positioned on each stage S1-10. In addition, the roller drive board 20 is not always rotated, and the roller drive board 20 may be rotated in a state where the roller unit 40 is positioned on each of the stages S1 to S10.

  By the way, although the rotation direction of the roller drive board 20 can be set suitably, it is reverse to the rotation direction of the component conveyance board 30 which moves the cylindrical components mounted in the roller unit 40 to each stage S1-10. In terms of the direction, the entire component conveying apparatus 100 can be an apparatus having a plurality of members having different rotation directions, and can be a stable apparatus. Moreover, in the aspect which always rotates the roller drive board 20, when rotating the component conveyance board 30 and moving between each stage S1-10, the relative speed of the roller drive board 20 and the component conveyance board 30 becomes high. Therefore, the rotational speed of the cylindrical part can be increased. Therefore, when moving the cylindrical part between the stages S1 to S10, dust or dust attached to the cylindrical part is shaken off, or dust or dust is transferred to the cylindrical part that is moving between the stages S1 to S10. It can be made difficult to adhere.

  On the other hand, in a mode in which the roller drive board 20 is always rotated, when the rotation direction of the roller drive board 20 is the same as the rotation direction of the component transport board 30, when the cylindrical part is moved between the stages S1 to S10, Since the relative speed between the roller driving board 20 and the parts conveying board 30 can be reduced, it is possible to suppress the occurrence of a problem that the cylindrical parts rotate unnecessarily at high speed and jump out of the roller unit 40. In particular, when the rotation speed of the roller drive board 20 and the rotation speed of the component conveying board 30 are the same, the rotation of the cylindrical member can be stopped while moving between the stages S1 to S10.

  Next, each stage S1-10 of a surface inspection apparatus is demonstrated based on FIG.

  The stage S <b> 1 is a loading stage for loading a cylindrical component into the component conveying apparatus 100. Here, the input stage is configured by using a known parts feeder (not shown) that accommodates a large number of cylindrical parts and aligns the individual cylindrical parts, and is positioned on the input stage from the parts feeder. One cylindrical part is supplied to the roller unit 40 one by one.

  Each of the stages S2 to S6 is an imaging stage, and is configured using a camera that images a desired part of the surface of the cylindrical part. By these stages S2 to S6, the outer peripheral surface, inner peripheral surface, one end surface, the other end surface of the surface of the cylindrical component, or the surface of the flange when the cylindrical component has a flange or a stepped portion. It is possible to inspect for damage such as scratches or dents on the surface of the cylindrical part by performing image processing by photographing appropriate portions such as the back surface, the end surface of the stepped portion, and the peripheral surface with a camera.

  Although the detailed description is omitted, the surface inspection apparatus of this example is configured using a computer and includes a control apparatus that performs the above-described image processing. The control device controls the operation of various devices at a take-out stage, which will be described later, according to the result of the inspection.

  The stage S7 is provided between the photographing stage and the extraction stage, and is a blank stage that does not perform any processing on the cylindrical part. When it takes time to process the images shot on the shooting stages of stages S2 to S6, securing a sufficient time for image processing by temporarily stopping the cylindrical part on this blank stage. Can do.

  Stages S <b> 8 to S <b> 10 are take-out stages for taking out the cylindrical parts from the parts conveying apparatus 100. Here, the take-out stage is configured by using an appropriate device (not shown) that picks up a cylindrical part placed on the roller unit 40 upward or jumps out of the parts conveying board. .

  Further, the three stages S8 to S10 are assigned as three types of extraction stages, that is, a non-defective product extraction stage, a defective product extraction stage, and a reinspection product extraction stage. The non-defective product taking out stage is a stage for taking out cylindrical parts that are determined to be non-defective as a result of performing image processing and inspection of images taken at the respective photographing stages. The defective product take-out stage is a stage for taking out a cylindrical part determined to be a defective product as a result of performing image processing and inspection of images taken at each imaging stage. The reinspection product take-out stage is a cylinder that has been determined to require re-inspection because it cannot determine whether it is a non-defective product or a defective product as a result of performing image processing and inspecting images taken at each imaging stage. It is a stage which takes out a shaped part.

  The cylindrical parts taken out from the non-defective product take-out stage, defective product take-out stage, and re-inspection product take-out stage are placed in their respective dedicated storage boxes through a transport path such as a dedicated chute or conveyor corresponding to each stage. Accumulated.

W Cylindrical parts Wa Flange Wb Step part 10 Base 11 Base 12 Tubular body 20 Roller drive panel 21 Drive panel body 22 Pulley 23 Mounting plate 24 Contact member (Roller contact part)
25 Presser Plate 30 Parts Conveying Board 31 Main Shaft 32 Pulley 33 Bush 34 Conveying Board Main Body 35 Unit Board 40 Roller Unit 41 Roller 42 Bracket 43 Connecting Bracket 44 Roller Shaft 100 Component Conveying Device

Claims (2)

The base,
It includes at least a loading stage for loading cylindrical parts, a plurality of imaging stages for photographing a predetermined part of the surface of the cylindrical parts with a camera, and an extraction stage for taking out the cylindrical parts, and is disposed around the base. Multiple stages,
A pair of rollers arranged in parallel so that the respective rotation axes are parallel to each other, and the roller between the pair of rollers in a state where the outer peripheral surface of the roller is in contact with the outer peripheral surface of the cylindrical part the cylindrical part is placed on the outer peripheral surface of the roller unit to rotate the cylindrical component by rotation of the roller, but is more arranged at predetermined angular intervals on the same circumference, rotates in a horizontal direction to the base A component conveyor that is freely supported and rotationally driven to move the cylindrical component placed on the roller unit between the stages;
The roller unit has a roller contact portion disposed below the roller unit and in contact with the outer peripheral surface of the roller. The roller base is rotatably supported on the base by the same rotation axis as the component conveying board and is driven to rotate. A roller drive board that rotates the roller by the roller contact portion ,
The cylindrical component surface inspection apparatus , wherein the rotation shaft of the roller is inclined upward toward the inside of the component conveying board . Before Symbol roller contact portion, the cylindrical parts of the surface inspection apparatus according to claim 1, characterized in that it is constituted by a circular cross section of the elastic member.

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