JP6486501B2 - Component mounting equipment - Google Patents

Description

  The present invention relates to a component mounting apparatus, and more particularly to a component mounting apparatus that captures an image of a component sucked by a suction nozzle from the side.

  2. Description of the Related Art Conventionally, a component mounting apparatus that captures an image of a component sucked by a suction nozzle from the side is known. For example, it is disclosed in Japanese Patent No. 5253540.

  The above-mentioned Japanese Patent No. 5253540 discloses a nozzle holder that can rotate around an axis extending in the vertical direction and holds a plurality of suction nozzles provided on a circumference concentric with the axis, and is arranged at the center of the nozzle holder. Electronic component mounting comprising a reflector with a mark for detecting the holding position of the electronic component on the lower surface, and a CCD camera and LED (light emitting diode) disposed on the side of the suction nozzle outside the nozzle holder An apparatus (component mounting apparatus) is disclosed. In this electronic component mounting apparatus, the light from the LED is reflected by the reflector disposed behind the suction nozzle while the light is not directly irradiated from the LED to the electronic component by the shielding plate. In this electronic component mounting apparatus, the light reflected by the reflector is incident on the CCD camera, so that the electronic component sucked by the suction nozzle is imaged from the side. Thereby, in this electronic component mounting apparatus, a captured image in which the background appears bright and the electronic component appears dark is acquired. In this electronic component mounting apparatus, the LEDs are provided on both sides of the CCD camera. That is, the LED is configured to irradiate light to the electronic component from the same side as the CCD camera.

Japanese Patent No. 5253540

  However, in the electronic component mounting apparatus described in Japanese Patent No. 5253540, since the LED irradiates the electronic component with light from the same side as the CCD camera, the light is not directly irradiated from the LED to the electronic component with the shielding plate. However, it is considered that the light from the LED is reflected to some extent by the electronic component. In this case, since the light reflected by the electronic component is incident on the CCD camera, it is considered that there is a problem that the contrast (contrast) between the background and the electronic component in the captured image is lowered. Moreover, in order not to irradiate light directly from LED to an electronic component, it is necessary to shield light, and there also exists a problem that the light quantity of the light irradiated from LED falls.

  The present invention has been made to solve the above problems, and one object of the present invention is to provide a background in a captured image while suppressing a decrease in the amount of light emitted from the light source unit. It is to provide a component mounting apparatus capable of suppressing a decrease in brightness difference (contrast) between a component and a component.

A component mounting apparatus according to an aspect of the present invention includes a rotary head including a plurality of suction nozzles arranged in a circular shape, and a position correction device provided on the rotation axis of the rotary head inside the circular suction nozzle array. A mark unit, a first imaging unit for imaging the position correction mark of the position correction mark unit from below, and a component that is provided outside the circular suction nozzle array and sucked by the suction nozzle from the side A second imaging unit for imaging, and a light source unit that is provided on the opposite side of the second imaging unit with respect to the suction nozzle on the second imaging unit side and emits light for imaging by the second imaging unit An illumination unit that emits light emitted from the light source unit toward the second imaging unit outside the circular suction nozzle array from the periphery of the position correction mark unit, and the illumination unit includes the position correction mark Provided around the light source section. Has been further comprises a diffusion member for diffusing light, diffusing member, that have a cylindrical shape surrounding the entire circumference of the position correction mark portion.

In the component mounting apparatus according to one aspect of the present invention, as described above, the second mounting unit is provided on the side opposite to the second imaging unit with respect to the suction nozzle on the second imaging unit side, and light is used for imaging by the second imaging unit. And an illumination unit that irradiates light emitted from the light source unit toward the second imaging unit outside the circular suction nozzle array from the periphery of the position correction mark unit. Thereby, unlike the case where the light source unit irradiates the component with light from the same side as the second imaging unit, the component can prevent the light from being reflected to the second imaging unit side. As a result, it is possible to suppress the light reflected by the component from entering the second imaging unit. Thereby, since it can suppress that a component appears brightly in a captured image, it can suppress that the difference (contrast) of the contrast of the background and components in a captured image falls. Moreover, since it is not necessary to shield light in order to prevent light from being directly irradiated onto the component from the light source unit, it is possible to suppress a decrease in the amount of light irradiated from the light source unit. As a result, it is possible to suppress a decrease in contrast (contrast) between the background and the component in the captured image while suppressing a decrease in the amount of light emitted from the light source unit. In addition, by irradiating light emitted from the light source unit toward the second imaging unit outside the circular suction nozzle array from the periphery of the position correction mark unit, the light emitted from the light source unit is used for position correction. Since it can be suppressed from being blocked by the mark part, even when the position correction mark part is provided, it is possible to suppress the position correction mark part from appearing in the captured image as a dark part.
The illumination unit further includes a diffusing member that is provided around the position correction mark unit and diffuses the light emitted from the light source unit. Thereby, since the light emitted from the light source unit can be diffused by the diffusion member, the light emitted from the light source unit can be easily irradiated over a wide range. As a result, since it is possible to suppress bright spots (high brightness points) from appearing in the captured image, it is possible to easily capture the background uniformly and brightly in the captured image. Thereby, it can suppress more that the difference (contrast) of the contrast of the background and components in a captured image falls.
The diffusing member has a cylindrical shape that surrounds the entire circumference of the position correction mark portion. If comprised in this way, a diffusion member can be functioned not only as a member which diffuses the light from a light source part but as a protection member which protects the position correction mark part from external force, oil, dust, etc. . As a result, the position correction mark portion can be protected from the adhesion of oil, dust, etc., or deformation due to an external force by the diffusion member.

In the component mounting apparatus according to the above aspect , the diffusion member is preferably configured to guide light while diffusing light from the light source unit toward the second imaging unit side from the light source unit side. If comprised in this way, since the light from a light source part can be light-guided with a diffusing member, ensuring sufficient light quantity, a background can be more uniformly and brightly imaged in a captured image. As a result, it is possible to more reliably suppress a decrease in contrast (contrast) between the background and the components in the captured image.

  In this case, preferably, the light source unit is provided outside the circular suction nozzle array on the side facing the second imaging unit, and the diffusing member is disposed around the position correction mark unit on the light source unit side. Is formed so as to extend from the light source unit side to the second image pickup unit side, and is configured to guide light while diffusing light from the light source unit toward the second image pickup unit side. If comprised in this way, even when a light source part is provided in the side which opposes a 2nd imaging part on the outer side of a circular adsorption nozzle arrangement | sequence, from a light source part toward the 2nd imaging part side, The light can be guided while being diffused by the diffusing member. As a result, it is possible to suppress the suction nozzle on the light source unit side from appearing in the captured image as a dark part and the light source unit itself from appearing in the captured image as a bright spot. Therefore, even when the light source unit is provided outside the circular suction nozzle array on the side facing the second imaging unit, the background can be reliably and uniformly captured in the captured image. Further, by providing the light source part outside the circular suction nozzle array, it is possible to easily secure the arrangement space of the light source part compared to the case where the light source part is provided inside the circular suction nozzle array.

In the component mounting apparatus according to the above aspect , the diffusion member preferably has a cylindrical shape. If comprised in this way, the diffusion member which has a cylindrical shape can be easily arrange | positioned inside circular suction nozzle arrangement | sequence. Also, unlike the case where the diffusing member has a polygonal cylindrical shape, the diffusing member having a cylindrical shape has no corners, thereby suppressing bright spots from appearing in the captured image due to the corners. Can do.

In the component mounting apparatus according to the above aspect , the lower end of the diffusion member preferably extends below the lower end of the position correction mark portion. If comprised in this way, since the circumference | surroundings of the position-correction mark part can be more reliably enclosed by a diffusing member, the position-correction mark part is more reliably protected from adhesion of oil, dust, etc., or deformation due to external force be able to.

In the component mounting apparatus according to the above aspect , the diffusion member is preferably formed by dispersing a diffusion material in a resin material having translucency. If comprised in this way, the light from a light source part can be easily diffused, permeate | transmitting light inside a diffusion member, with the diffusion member which disperse | distributed the diffusion material to the resin material which has translucency.

  According to the present invention, as described above, the difference in contrast (contrast) between the background and the component in the captured image is reduced while suppressing a reduction in the amount of light emitted from the light source unit by the shielding plate. It is possible to provide a component mounting apparatus capable of suppressing the above.

It is a figure showing the whole component mounting device composition by one embodiment of the present invention. It is a block diagram which shows the control structure of the component mounting apparatus of one Embodiment. It is a typical side view which shows the rotary head and imaging unit of the component mounting apparatus of one Embodiment. It is typical sectional drawing which shows the position correction mark part and diffusion member of the rotary head of one Embodiment. It is the schematic diagram which looked at the rotary head and imaging unit of one embodiment from the lower part. It is a figure for demonstrating transmission of the light by the diffusion member of the rotary head of one Embodiment. It is typical sectional drawing which shows the mark part for position correction, the diffusion member, and the light source part of the rotary head by the 1st modification of one Embodiment. It is a typical top view which shows the light source part by the 1st modification of one Embodiment. It is typical sectional drawing which shows the mark part for position correction, the diffusion member, and the light source part of the rotary head by the 2nd modification of one Embodiment. It is a typical side view which shows the rotary head and imaging unit by a reference example.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

(Configuration of component mounting device)
With reference to FIGS. 1-5, the structure of the component mounting apparatus 100 by one Embodiment of this invention is demonstrated.

  As shown in FIG. 1, the component mounting apparatus 100 is an apparatus for mounting a component E (electronic component) such as an IC, a transistor, a capacitor, and a resistor on a substrate P such as a printed circuit board.

  Further, the component mounting apparatus 100 includes a base 1, a transport unit 2, a rotary head 3, a support unit 4, a rail unit 5, a component recognition camera 6, an imaging unit 7, and a control device 8 (FIG. 2). Reference). The component recognition camera 6 is an example of the “first imaging unit” in the claims.

  Feeder arrangement portions 12 for arranging a plurality of tape feeders 11 are respectively provided at both ends (Y1 side and Y2 side) of the base 1 in the Y direction.

  The tape feeder 11 holds a reel (not shown) around which a tape holding a plurality of components E at a predetermined interval is wound. The tape feeder 11 is configured to supply the component E from the tip of the tape feeder 11 by sending a tape that holds the component E by rotating the reel.

  Each tape feeder 11 is arranged in the feeder arrangement unit 12 in a state of being electrically connected to the control device 8 via a connector (not shown) provided in the feeder arrangement unit 12. Thereby, each tape feeder 11 is configured to send the tape from the reel and supply the component E based on the control signal from the control device 8. At this time, each tape feeder 11 is configured to supply the component E according to the mounting operation of the rotary head 3.

  The conveyance unit 2 has a pair of conveyors 2a. The transport unit 2 has a function of transporting the substrate P in the horizontal direction (X direction) by the pair of conveyors 2a. Specifically, the transport unit 2 loads the substrate P before mounting from a transport path (not shown) on the upstream side (X1 side), transports the loaded substrate P to the mounting work position M, and downstream (X2 And a board P that has been mounted on the transfer path (not shown). In addition, the transport unit 2 is configured to hold and fix the substrate P stopped at the mounting work position M by a substrate fixing mechanism (not shown) such as a clamp mechanism.

  The pair of conveyors 2a of the transport unit 2 is configured to be able to transport the substrate P in the horizontal direction (X direction) while supporting the substrate P from below. The pair of conveyors 2a is configured to be able to adjust the interval in the Y direction. Thereby, according to the magnitude | size of the board | substrate P carried in, it is possible to adjust the space | interval of a pair of conveyor 2a in the Y direction.

  The rotary head 3 is provided at a position above the transport unit 2 and the tape feeder 11 and is configured to be movable in the horizontal direction (X direction and Y direction) via the support unit 4 and the pair of rail units 5. Has been. The rotary head 3 is configured to mount the component E on the substrate P fixed at the mounting work position M. The rotary head 3 includes a ball nut 31, twelve suction nozzles 32, twelve Z-axis motors 33 (see FIG. 2) provided in each of the twelve suction nozzles 32, and twelve suction nozzles 32. Twelve R-axis motors 34 (see FIG. 2) and one head motor 35 are provided.

  The twelve suction nozzles 32 are arranged in a circle at regular angular intervals in the rotary head 3. The suction nozzle 32 is configured to be able to suck and hold the component E supplied from the tape feeder 11 by a negative pressure generated at the tip by a negative pressure generator (not shown).

  Further, the suction nozzle 32 is configured to be movable up and down in the vertical direction (Z direction). Specifically, the suction nozzle 32 is located between a position in a lowered state when sucking or mounting (mounting) the component E and a position in a raised state when performing transportation or imaging of the component E. It can be moved up and down. In the rotary head 3, the twelve suction nozzles 32 are configured to be moved up and down for each suction nozzle 32 by a Z-axis motor 33 provided for each suction nozzle 32. The twelve suction nozzles 32 are configured to be rotatable around the central axis (around the Z direction) for each suction nozzle 32 by an R-axis motor 34 provided for each suction nozzle 32. The rotary head 3 is configured to be rotatable around a rotation axis A (see FIG. 3) extending in the vertical direction by the head motor 35.

  The rotary head 3 is configured to be movable in the X direction along the support portion 4. Specifically, the support portion 4 includes a ball screw shaft 41, an X-axis motor 42 that rotates the ball screw shaft 41, and a guide rail (not shown) that extends in the X direction. The rotary head 3 is configured to be movable in the X direction along the support portion 4 together with the ball nut 31 to which the ball screw shaft 41 is engaged (screwed) by rotating the ball screw shaft 41 by the X-axis motor 42. Has been.

  Further, the support portion 4 is configured to be movable in the Y direction orthogonal to the X direction along a pair of rail portions 5 fixed on the base 1. Specifically, the rail portion 5 rotates a pair of guide rails 51 that support both end portions in the X direction of the support portion 4 so as to be movable in the Y direction, a ball screw shaft 52 that extends in the Y direction, and the ball screw shaft 52. Y axis motor 53 is included. The support portion 4 is provided with a ball nut 43 with which the ball screw shaft 52 is engaged (screwed). The support portion 4 is movable in the Y direction along the pair of rail portions 5 together with the ball nut 43 to which the ball screw shaft 52 is engaged (screwed) by rotating the ball screw shaft 52 by the Y-axis motor 53. It is configured.

  With such a configuration, the rotary head 3 is configured to be movable in the horizontal direction (X direction and Y direction) on the base 1. Thereby, the rotary head 3 can move above the tape feeder 11, for example, and can adsorb | suck the component E supplied from the tape feeder 11. FIG. Further, the rotary head 3 can move, for example, above the substrate P fixed at the mounting operation position M, and mount the sucked component E on the substrate P.

  The component recognition camera 6 is configured to image the component E sucked by the suction nozzle 32 prior to mounting the component E. In addition, the component recognition camera 6 is configured to image a position correction mark (hole 37b), which will be described later, prior to the mounting of the component E. The component recognition camera 6 is fixed on the upper surface of the base 1 and is configured to take an image of the component E and the position correction mark sucked by the suction nozzle 32 from below (Z2 direction). This imaging result is acquired by the control device 8. The control device 8 is configured to recognize and correct the suction state (rotational posture and suction position with respect to the suction nozzle 32) of the component E viewed from below based on the imaging result of the part E sucked by the suction nozzle 32. Has been. Further, the control device 8 recognizes the positional deviation of the rotary head 3 (for example, the positional deviation of the rotary head 3 due to the thermal extension of the support part 4 or the rail part 5) based on the imaging result of the position correction mark, and The positional deviation of the head 3 is corrected. That is, the position correction mark is a mark for correcting the positional deviation of the rotary head 3.

  The imaging unit 7 is configured to image the suction nozzle 32 and the component E sucked by the suction nozzle 32 from the side (horizontal direction) prior to mounting the component E. This imaging result is acquired by the control device 8. The control device 8 is configured to recognize the suction state of the component E (suction posture with respect to the suction nozzle 32) viewed from the side, based on the imaging result of the suction nozzle 32 and the component E sucked by the suction nozzle 32. ing. Further, the control device 8 recognizes the actual thickness of the component E viewed from the side based on the imaging result of the suction nozzle 32 and the sucked component E, and corrects the variation in the thickness of the component E due to tolerance. It is configured as follows.

  The imaging unit 7 is provided on the rotary head 3 and is configured to be movable along the rotary head 3 in the X direction and the Y direction. Details of the imaging unit 7 will be described later.

  As shown in FIG. 2, the control device 8 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and is configured to control the operation of the component mounting apparatus 100. ing. Specifically, the control device 8 controls the transport unit 2, the X-axis motor 42, the Y-axis motor 53, the Z-axis motor 33, the R-axis motor 34, the head motor 35, and the like according to a program stored in advance, and A component E is mounted on P.

  Specifically, first, the control device 8 moves the rotary head 3 above the tape feeder 11. The control device 8 generates a negative pressure at the suction nozzle 32 by a negative pressure generator (not shown). Then, the control device 8 causes the suction nozzle 32 to suck the component E supplied from the tape feeder 11.

  Then, the control device 8 moves the rotary head 3 from above the tape feeder 11 to above the substrate P. While moving the rotary head 3 to above the substrate P, the control device 8 moves the rotary head 3 so as to pass above the component recognition camera 6. Then, the control device 8 causes the component recognition camera 6 to capture an image of the component E sucked by each suction nozzle 32 from below. In addition, while moving the rotary head 3 to above the substrate P, the control device 8 causes the imaging unit 7 to image each suction nozzle 32 and the part E sucked by each suction nozzle 32 from the side.

  When the rotary head 3 reaches above the fixed substrate P at the substrate working position M, the control device 8 lowers the head 32. Then, the control device 8 mounts (mounts) the sucked component E on the substrate P by stopping the supply of the negative pressure to the head 32 at a predetermined timing.

(Rotary head configuration)
As shown in FIGS. 3 to 5, the rotary head 3 is provided with a holding member 36 that holds the twelve suction nozzles 32 so as to be movable up and down in the vertical direction (Z direction). The holding member 36 is configured to hold the 12 suction nozzles 32 in a state where the 12 suction nozzles 32 are arranged in a circular shape.

  The rotary head 3 is provided with a mark forming member 37 inside the circular suction nozzle array. The tip portion of the mark forming member 37 has a cylindrical shape and is formed as a position correcting mark portion 37a protruding downward. The position correction mark portion 37 a is provided on the inner side of the circular suction nozzle array and on the rotation axis A of the rotary head 3. That is, the position correction mark portion 37 a is provided at the center of the rotary head 3. The holding member 36 is configured to hold a mark forming member 37 (position correction mark portion 37a) in addition to the twelve suction nozzles 32.

  In the rotary head 3, the holding member 36 is rotated around the rotation axis A by the head motor 35 (see FIG. 2). As a result, the twelve suction nozzles 32 and the mark forming member 37 (position correction mark portion 37a) held by the holding member 36 are rotated around the rotation axis A together with the holding member 36. Similarly, a diffusing member 72 b of the illumination unit 72 (described later) held by the mark forming member 37 is also rotated around the rotation axis A together with the holding member 36.

  The position correcting mark portion 37a having a cylindrical shape is provided with a hole portion 37b (see FIG. 4) having a circular shape in plan view (viewed from the top and bottom direction). The hole 37b is provided at the center of the position correction mark 37a. In the position correction mark portion 37a, the position correction mark includes a hole portion 37b. The hole 37a is an example of the “position correction mark” in the claims. Further, the position correction mark portion 37a having a cylindrical shape is made of, for example, metal, and the outer peripheral surface 37c of the position correction mark portion 37a is configured to reflect light. The lower end surface of the position correction mark portion 37a is also configured to reflect light.

  The position correction mark formed by the hole 37b is imaged from below (Z2 direction) by the component recognition camera 6 (see FIG. 1). At the time of imaging, since light is not reflected from the hole 37b, the hole 37b appears dark in the captured image. In addition, since light is reflected from the surface around the hole 37b (the lower end surface of the position correction mark portion 37a), the surface around the hole 37b (that is, the background) appears bright in the captured image. That is, the position correction mark formed by the hole 37b can be recognized by the control device 8 as a dark part at the center of the annular bright part.

  In addition to the position correction mark formed by the hole 37b, the component E sucked by the suction nozzle 32 is also imaged from below by the component recognition camera 6. Since light is reflected from the lower surface of the component E during imaging, the component E appears bright in the captured image. Further, since light is not reflected from the space around the component E, the periphery (that is, the background) of the component E appears dark in the captured image. That is, the component E can be recognized by the control device 8 as a dark part in the bright part.

  The imaging unit 7 is provided with an imaging unit 71. The imaging unit 71 includes an imaging element such as a CCD image sensor. The imaging unit 71 is provided outside the circular suction nozzle array in order to capture the component E sucked by the suction nozzle 32 and the tip of the suction nozzle 32 from the side. The imaging unit 71 is an example of the “second imaging unit” in the claims.

  The imaging unit 7 is provided with an illumination unit 72. The illumination unit 72 includes a light source unit 72a and a diffusion member 72b. The light source unit 72 a includes a plurality of LEDs (light emitting diodes) as a light source, and is configured to emit light for imaging by the imaging unit 71.

  Here, in the present embodiment, the light source unit 72a captures images outside the circular suction nozzle array and with respect to the suction nozzle 32 on the imaging unit 71 side (in FIG. 3, the suction nozzle 32 on the X1 side). It is provided on the opposite side (X2 side) from the part 71. That is, the light source unit 72a is provided on the side facing the imaging unit 71 in the horizontal direction outside the circular suction nozzle array.

  In other words, the light source unit 72a is disposed at a position opposite to the imaging unit 71 with the suction nozzle 32, the diffusing member 72b, and the position correction mark unit 37a interposed therebetween. The light is emitted toward the imaging unit 71.

  In the present embodiment, the diffusing member 72b is provided around the position correction mark portion 37a, and is configured to diffuse the light emitted from the light source portion 72a. The diffusion member 72b is formed by dispersing a particulate diffusion material in a resin material having translucency such as acrylic resin.

  The diffusing member 72b is provided with a cylindrical portion 72c having a cylindrical shape extending in the vertical direction. That is, the diffusing member 72b has a hollow structure. The position correction mark portion 37a is disposed in a space (in the hollow structure) defined by the cylindrical portion 72c of the diffusing member 72b. Further, the inner diameter D1 (see FIG. 4) of the cylindrical portion 72c of the diffusing member 72b is sufficiently larger than the outer diameter D2 of the position correcting mark portion 37a having a cylindrical shape. Further, the outer diameter D3 (see FIG. 5) of the cylindrical portion 72c of the diffusing member 72b is sufficiently larger than the width (outer diameter) D4 of the suction nozzle 32.

  The cylindrical portion 72c of the diffusing member 72b is configured to surround the entire outer periphery 37c of the position correction mark portion 37a having a columnar shape. In the present embodiment, the lower end of the cylindrical portion 72c of the diffusing member 72a extends below the lower end of the position correction mark portion 37a.

  In addition, the diffusing member 72b is provided with a hook-shaped fixing portion 72d extending in the horizontal direction from the upper end portion of the cylindrical portion 72c inward. The diffusing member 72b is fixed to the mark forming member 37 by, for example, an adhesive or a screw through the fixing portion 72d. That is, the diffusion member 72 b is held by the mark forming member 37.

  In the present embodiment, the cylindrical portion 72c of the diffusing member 72b has a cylindrical shape, so that the light source portion 72a side (X2 in FIG. 3) around the outer peripheral surface 37c of the position correction mark portion 37a. Side) to the imaging unit 71 side (X1 side in FIG. 3) so as to extend while drawing an arc. Thereby, the diffusing member 72b is configured to guide light while diffusing light from the light source unit 72a side toward the imaging unit 71 side from the light source unit 72a side. Further, when the light is guided while diffusing, the diffusing member 72b is configured so that the outer peripheral surface of the cylindrical portion 72c emits light.

  With such a configuration, in the present embodiment, the illumination unit 72 emits light emitted from the light source unit 72a toward the imaging unit 71 outside the circular suction nozzle array from the periphery of the position correction mark unit 37a. It is configured to irradiate. In the imaging unit 7, the imaging unit 71 and the light source unit 72 a are held by the rotary head 3 separately from the holding member 36 and are configured not to rotate with the rotation of the holding member 36.

  Next, with reference to FIG. 6, the imaging from the side of the component E sucked by the suction nozzle 32 and the tip of the suction nozzle 32 by the imaging unit 7 will be described.

  As shown in FIG. 6, when light is emitted from the light source part 72a, the emitted light is guided from the light source part 72a side to the imaging part 71 side while being diffused by the diffusion member 72b. When light is guided, a part of the light is guided while being diffused in the cylindrical portion 72c having a cylindrical shape, for example, as in an optical path L1 shown in FIG. Further, another part of the light passes through the cylindrical portion 72c and is reflected by the outer peripheral surface 37c of the position correction mark portion 37a, and then enters the cylindrical portion 72c as in an optical path L2 shown in FIG. The light enters again and is guided while being diffused in the cylindrical portion 72c. Further, another part of the light passes through the cylindrical portion 72c and is not reflected by the outer peripheral surface 37c of the position correction mark portion 37a, for example, as in an optical path L3 shown in FIG. The light is incident on 72c again and is guided while being diffused in the cylindrical portion 72c.

  As a result of light being guided while being diffused by the cylindrical portion 72c, light is emitted from the back side (X2 side) of the suction nozzle 32 (the suction nozzle 32 on the imaging portion 71 side) of the imaging target shown in FIG. . A part of the light emitted from the back side is blocked by the suction nozzle 32 and the component E. In addition, the light irradiated from the back side is incident on the imaging unit 71 through another portion of the adjacent suction nozzle 32. As a result, the component E and the suction nozzle 32 appear dark in the captured image. Further, the periphery of the part E and the suction nozzle 32 (that is, the background) appears bright in the captured image. That is, it is possible for the controller 8 to recognize the tip of the suction nozzle 32 and the component E as a dark part in the bright part.

  As described above, by configuring the outer peripheral surface 37c of the position correction mark portion 37a so as to reflect light, the position correction mark portion 37a can reflect light, so that the position correction mark portion can be reflected. It is possible to prevent 37a from appearing in the captured image as a dark part.

  Further, as described above, by making the outer diameter D3 (see FIG. 5) of the cylindrical portion 72c of the diffusing member 72b sufficiently larger than the width D4 of the suction nozzle 32, the light emitted from the light source portion 72a can be reduced. Irradiation over a wide range is possible. As a result, even when imaging is performed with the position of the suction nozzle 32 to be imaged slightly shifted in the rotation direction, or when imaging a relatively large component E, there is a difference in contrast between the background and the component E (contrast). It is possible to image the component E and the suction nozzle 32 while suppressing the decrease.

(Effect of this embodiment)
In the present embodiment, the following effects can be obtained.

  In the present embodiment, as described above, the suction nozzle 32 on the imaging unit 71 side is provided on the side opposite to the imaging unit 71, and includes the light source unit 72a that emits light for imaging by the imaging unit 71. An illumination unit 72 that irradiates light emitted from the light source unit 72a toward the imaging unit 71 outside the circular suction nozzle array from around the position correction mark unit 37a is provided. Thereby, unlike the case where the light source unit 72a irradiates the component E with light from the same side as the imaging unit 71, it is possible to prevent the component E from reflecting light to the imaging unit 71 side. As a result, the light reflected by the component E can be prevented from entering the imaging unit 71. Thereby, since it can suppress that the components E appear brightly in a captured image, it can suppress that the difference (contrast) of the contrast of the background and the components E in a captured image falls. Moreover, since it is not necessary to shield light in order to prevent light from being directly irradiated from the light source part 72a to the component E, it can suppress that the light quantity of the light irradiated from the light source part 72a falls. As a result, it is possible to suppress a decrease in contrast (contrast) between the background and the part E in the captured image while suppressing a decrease in the amount of light emitted from the light source unit 72a. In addition, the light emitted from the light source unit 72a is positioned by irradiating the light emitted from the light source unit 72a toward the imaging unit 71 outside the circular suction nozzle array from the periphery of the position correction mark unit 37a. Since it can be suppressed from being blocked by the correction mark portion 37a, even when the position correction mark portion 37a is provided, it is possible to suppress the position correction mark portion 37a from appearing in the captured image as a dark portion. it can.

  In the present embodiment, as described above, the illumination unit 72 is provided with the diffusion member 72b that is provided around the position correction mark unit 37a and diffuses the light emitted from the light source unit 72a. Thereby, since the light emitted from the light source part 72a can be diffused by the diffusion member 72b, the light emitted from the light source part 72a can be easily irradiated over a wide range. As a result, since it is possible to suppress bright spots from appearing in the captured image, it is possible to easily capture the background uniformly and brightly in the captured image. Thereby, it can suppress more that the difference (contrast) of the brightness and darkness of the background and the components E in a captured image falls.

  In the present embodiment, as described above, the diffusion member 72 is configured to guide the light from the light source unit 72a while diffusing the light from the light source unit 72a toward the imaging unit 71 side. Thereby, since the light from the light source part 72a can be guided by the diffusing member 72b while securing a sufficient amount of light, the background can be more uniformly and brightly captured in the captured image. As a result, it is possible to more reliably suppress a decrease in contrast (contrast) between the background and the part E in the captured image.

  In the present embodiment, as described above, the light source unit 72a is provided on the side facing the imaging unit 71 outside the circular suction nozzle array. Then, the light from the light source unit 72a is emitted from the light source unit 72a side to the imaging unit 71 side by being formed around the position correction mark unit 37a from the light source unit 72a side to the imaging unit 71 side. The diffusing member 72b is configured to guide light while diffusing. Thus, even when the light source unit 72a is provided on the side facing the imaging unit 71 outside the circular suction nozzle array, the light from the light source unit 72a is directed from the light source unit 72a side to the imaging unit 71 side. The light can be guided while being diffused by the diffusing member 72b. As a result, it is possible to suppress the suction nozzle 32 on the light source unit 72a side from appearing in the captured image as a dark part and the light source unit 72a itself from appearing in the captured image as a bright spot. Therefore, even when the light source unit 72a is provided outside the circular suction nozzle array on the side facing the imaging unit 71, the background can be reliably and uniformly captured in the captured image. Further, by providing the light source part 72a outside the circular suction nozzle array, it is possible to easily secure the arrangement space of the light source part 72a as compared with the case where the light source part is provided inside the circular suction nozzle array. it can.

  In the present embodiment, as described above, the diffusing member 72b has a cylindrical shape surrounding the entire circumference of the position correction mark portion 37a. Thereby, the diffusing member 72b can function not only as a member that diffuses the light from the light source part 72a, but also as a protective member that protects the position correcting mark part 37a from external force, oil, dust, and the like. As a result, the position correcting mark portion 37a can be protected from the adhesion of oil, dust, etc., or deformation due to external force by the diffusing member 72b.

  In the present embodiment, as described above, the diffusing member 72b has a cylindrical shape. Thereby, the diffusing member 72b having a cylindrical shape can be easily arranged inside the circular suction nozzle array. Unlike the case where the diffusing member has a polygonal cylindrical shape, the diffusing member 72b having a cylindrical shape has no corners, so that bright spots are not reflected in the captured image due to the corners. be able to.

  In the present embodiment, as described above, the lower end of the diffusing member 72b extends below the lower end of the position correction mark portion 37a. Thereby, since the periphery of the position correction mark portion 37a can be more reliably surrounded by the diffusing member 72b, the position correction mark portion 37a can be more reliably protected from adhesion of oil, dust, etc., or deformation due to external force. Can do.

  In the present embodiment, as described above, the diffusion member 72b is formed by dispersing the diffusion material in the translucent resin material. Thereby, the light from the light source part 72a can be easily diffused while the light is transmitted through the diffusion member 72b by the diffusion member 72b in which the diffusion material is dispersed in the light-transmitting resin material.

[Modification]
In addition, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is shown not by the above description of the embodiment but by the scope of claims, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims.

  For example, in the above-described embodiment, an example in which twelve suction nozzles are provided in the rotary head has been described, but the present invention is not limited to this. In the present invention, the rotary head may be provided with 2 or more and 11 or less suction nozzles, or 13 or more suction nozzles.

  Moreover, although the light source part was provided in the outer side of the circular adsorption nozzle arrangement | sequence and the diffusion member was provided in the inner side of the circular adsorption nozzle arrangement | sequence in the said embodiment, this invention is not limited to this. In the present invention, both the light source unit and the diffusing member may be provided inside the circular suction nozzle array.

  For example, in the first modification shown in FIGS. 7 and 8, the illumination unit 172 includes a light source unit 172a and a diffusion member 72b. Both the light source 172a and the diffusing member 72b are provided inside the circular suction nozzle array. The light source part 172a is provided above the fixing part 72d of the diffusing member 72b, and is configured to emit light from the upper surface of the fixing part 72d of the diffusing member 72b toward the inside of the diffusing member 72b. The light emitted from the light source unit 172a is guided while being diffused by the diffusion member 72b toward the imaging unit 71 (that is, toward the side). In the first modification, the light source unit 172 includes a light source substrate 175 having an annular shape and a plurality (eight in FIG. 8) of LEDs (light emitting diodes) 176, as shown in FIGS. doing. The eight LEDs 176 are arranged in a circular shape at equiangular intervals on the light source substrate 175.

  In the second modification shown in FIG. 9, the illumination unit 272 includes a light source unit 272a and a diffusion member 72b. Both the light source 272a and the diffusing member 72b are provided inside the circular suction nozzle array. The light source part 272a is provided so as to extend from the upper side to the side of the fixing part 72d of the diffusing member 72b, and emits light from the inner side surface of the fixing part 72d of the diffusing member 72b toward the inside of the diffusing member 72b. It is configured. The light emitted from the light source unit 272a is guided while being diffused by the diffusion member 72b toward the imaging unit 71 (that is, toward the side). Also in the second modified example, as in the first modified example, the light source unit 272a includes a light source substrate 275 having an annular shape and a plurality (eight) LEDs (light emitting diodes) 276. The eight LEDs 276 are arranged in a circular shape at equiangular intervals on the light source substrate 275.

In the reference example illustrated in FIG. 10, the illumination unit 372 includes a light source unit 372a. The light source unit 372a includes a surface-emitting light source such as an organic LED (organic light emitting diode) and is provided around the position correction mark unit 37a. The light source unit 372a has a cylindrical shape and is configured so that at least an outer peripheral surface emits light. The light source part 372a having a cylindrical shape is configured to surround the entire circumference of the outer peripheral surface 37c of the position correction mark part 37a. Also by this, similarly to the illumination part 72 of the said embodiment, it can suppress that the difference (contrast) of the brightness and darkness of the background and the components E in a captured image falls. Further, when configured as in the reference example, the light emitted from the light source unit 372a can be irradiated over a wide range without providing a diffusing member.

  Moreover, in the said embodiment, although the diffusion member showed the example which had cylindrical shape, this invention is not limited to this. In the present invention, the diffusing member may have a cylindrical shape other than the cylindrical shape. For example, it may have a cylindrical shape such as a polygonal cylindrical shape or an elliptical cylindrical shape.

  In the above embodiment, an example in which the diffusing member covers the entire circumference of the position correction mark portion has been described, but the present invention is not limited to this. In the present invention, as long as light can be guided toward the imaging unit (second imaging unit) by the diffusing member, the diffusing member may not cover the entire circumference of the position correction mark unit.

  In the above-described embodiment, the example in which the lower end of the diffusing member extends downward from the lower end of the position correction mark portion is shown, but the present invention is not limited to this. In the present invention, the lower end of the diffusing member does not have to extend below the lower end of the position correction mark portion. For example, the lower end of the diffusion member and the lower end of the position correction mark portion may be at the same height position, or the lower end of the diffusion member may be above the lower end of the position correction mark portion.

  Moreover, although the said embodiment showed the example which formed the diffusion member by disperse | distributing a diffusion material to the resin material which has translucency, this invention is not limited to this. In the present invention, the diffusing member may be formed by a method other than dispersing the diffusing material in the translucent resin material. For example, the diffusion member may be formed by performing a surface treatment that diffuses light on the surface.

  Further, in the above-described embodiment, an example in which the position correction mark of the position correction mark portion is configured by a hole has been described, but the present invention is not limited to this. In the present invention, the position correction mark of the position correction mark portion may be configured by other than the hole portion as long as it can be identified. For example, the position correction mark may be constituted by paint or a member attached to the lower end surface of the position correction mark portion.

3 Rotary head 6 Component recognition camera (1st imaging unit)
32 Suction nozzle 37a Position correction mark portion 37b Hole portion (position correction mark)
71 Imaging unit (second imaging unit)
72, 172, 272, 372 Illumination unit 72a, 172a, 272a, 372a Light source unit 72b Diffusion member 100 Component mounting device E Component

Claims (6)

A rotary heads including a plurality of adsorption Nozzle arranged in a circle,
A position correction mark portion provided on the rotation axis of the rotary head inside the circular suction nozzle array;
A first imaging section for capturing an image of the position correction mark of the position correction mark portion from below,
Provided outside the circular suction nozzle array, a second imaging unit for imaging the part products adsorbed to the suction nozzle from the side,
The position correction mark includes a light source unit that is provided on the side opposite to the second imaging unit with respect to the suction nozzle on the second imaging unit side and that emits light for imaging by the second imaging unit. from the surrounding parts toward the second imaging section of the outside of the circular suction nozzle array and a lighting unit for irradiating the light emitted from the light source unit,
The illumination unit further includes a diffusion member that is provided around the position correction mark unit and diffuses light emitted from the light source unit,
The diffusing member, that have a cylindrical shape surrounding the entire periphery of the position correction mark section, the component mounting apparatus. The component mounting apparatus according to claim 1 , wherein the diffusing member is configured to guide light while diffusing light from the light source unit from the light source unit side toward the second imaging unit side. The light source unit is provided on the outer side of the circular suction nozzle array and on the side facing the second imaging unit,
The diffusion member is formed to extend from the light source unit side to the second imaging unit side around the position correction mark unit, so that the light source unit side is directed to the second imaging unit side. The component mounting apparatus according to claim 2 , wherein the component mounting apparatus is configured to guide light while diffusing light from the light source unit. The diffusing member has a cylindrical shape, the component mounting apparatus according to claim 1. The lower end of the diffusing member, the lower end of the position correction mark portion extends downward, the component mounting apparatus according to claim 1. The component mounting apparatus according to claim 1 , wherein the diffusing member is formed by dispersing a diffusing material in a resin material having translucency.

Images