WO2014188579A1 - 塗布試行装置、ディスペンサおよび電子部品実装装置 - Google Patents
塗布試行装置、ディスペンサおよび電子部品実装装置 Download PDFInfo
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- WO2014188579A1 WO2014188579A1 PCT/JP2013/064456 JP2013064456W WO2014188579A1 WO 2014188579 A1 WO2014188579 A1 WO 2014188579A1 JP 2013064456 W JP2013064456 W JP 2013064456W WO 2014188579 A1 WO2014188579 A1 WO 2014188579A1
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- coating
- support member
- application
- coating liquid
- unit
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K13/00—Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
- H05K13/04—Mounting of components, e.g. of leadless components
- H05K13/046—Surface mounting
- H05K13/0469—Surface mounting by applying a glue or viscous material
Definitions
- the present invention relates to a coating trial device used for measuring a coating amount of a coating liquid, and a dispenser and an electronic component mounting device equipped with the coating trial device.
- cream solder or adhesive for mounting electronic components on a substrate often flows out of an application nozzle and is applied to the substrate in the form of dots.
- This application nozzle is provided in a dispenser or an electronic component mounting apparatus.
- a dispenser is an apparatus for applying cream solder or an adhesive exclusively to a substrate with an application nozzle.
- the electronic component mounting apparatus is an apparatus for mounting an electronic component on a substrate.
- the coating nozzle provided in the electronic component mounting apparatus is provided in a head unit having a suction nozzle for component suction.
- the application nozzle descends toward the substrate in a state where an application liquid such as cream solder or adhesive overflows in a hemispherical shape from the lower end of the application nozzle.
- the coating liquid adheres to the substrate when the coating nozzle approaches the substrate. That is, the above-described coating apparatus applies the coating liquid to the substrate in a dot shape.
- the coating amount of the coating solution can be estimated based on the size of the coating solution applied in the form of dots.
- a coating trial apparatus described in Patent Document 1, for example.
- the trial application device disclosed in Patent Document 1 includes a member to be coated on which a coating solution is applied in a dot shape.
- the size of the application liquid applied in a dot shape is measured by using the image data obtained by imaging the application liquid applied to the member to be applied with a camera from above.
- Thin belt-shaped paper is used for the member to be coated. This paper can transmit light.
- the coated member made of paper is wound up in a roll shape, and is fed by a feeding mechanism by a predetermined amount onto a flat plate-shaped support member when a coating solution is applied. This feed mechanism feeds the member to be coated by a predetermined length in the longitudinal direction.
- the support member is disposed on the lighting device, and has a function of supporting the member to be coated above the lighting device and a function of diffusing light of the lighting device and guiding it to the member to be coated.
- This support member is made of plastic.
- the illumination device irradiates light onto the support member from below when the camera takes an image.
- the camera captures an image of the member to be coated with the coating liquid in a state where the light from the illumination device is irradiated on the support member. At this time, the camera images the coating liquid that appears as a shadow in a bright background.
- the size of the dot-shaped coating solution is measured based on the contour of the coating solution included in the image data captured by the camera.
- the size of the coating liquid applied to the member to be coated may not be measured correctly.
- the reason for this is considered that static electricity is generated by being rubbed against the support member when the member to be coated is sent. That is, the coating liquid applied to the member to be coated is repelled by static electricity, and the shape of the coating liquid after coating is different from usual. Due to the influence of static electricity, the size of the coating solution becomes larger or smaller than the actual size, and the shape becomes unstable, so that the size of the coating solution measured by the coating trial apparatus becomes inaccurate.
- the support member In order to solve such a problem, it is conceivable to form the support member with a conductive material such as metal to prevent the generation of static electricity. However, if this configuration is adopted, the light of the illumination device is blocked by the support member, and thus it becomes difficult to image the coating liquid after coating with a camera.
- the present invention has been made to solve such problems, and an object of the present invention is to provide a coating trial apparatus capable of measuring the size of the coating solution after coating with high accuracy.
- the application trial apparatus includes a support member formed so that light can be transmitted and a flat upper surface, and a coating liquid in a state of being superimposed on the upper surface of the support member.
- a member to be coated is provided, and a light source that irradiates the support member with light from below.
- the support member has a property of preventing charging.
- the present invention even if static electricity is generated due to friction between the member to be coated and the support member, the member to be coated and the support member are not charged. For this reason, a coating liquid is correctly apply
- FIG. 1 is a plan view of a dispenser according to the first embodiment.
- FIG. 2 is a side view of the coating head according to the first embodiment.
- FIG. 2 is drawn with a part of the coating head broken.
- FIG. 3 is a perspective view of the dot station according to the first embodiment.
- FIG. 3 is drawn with a part of the cover broken.
- FIG. 4 is an enlarged cross-sectional view showing a main part of the dot station.
- FIG. 5 is an exploded perspective view of the holder.
- FIG. 6 is a cross-sectional view of the support member.
- FIG. 7 is a cross-sectional view of the light diffusing member.
- FIG. 8 is a cross-sectional view of a support member and a light diffusing member according to the second embodiment.
- FIG. 9 is a plan view of an electronic component mounting apparatus according to the third embodiment.
- FIG. 10 is a front view of the electronic component mounting apparatus according to the third embodiment.
- the dispenser 1 shown in FIG. 1 is configured by mounting various devices to be described later on a base 2.
- the left-right direction in FIG. 1 is referred to as the X direction
- the horizontal direction orthogonal to the X direction is referred to as the Y direction.
- the lower side one end side in the Y direction
- the upper side the other end side in the Y direction
- the apparatus rear side the upper side
- the base 2 includes a substrate transport device 4 for transporting and holding the substrate 3, a coating device 6 for coating the substrate 3 with the coating liquid 5 (see FIG. 2), and a coating trial device according to the present invention.
- the dot station 7 is supported.
- the base 2 constitutes a “base portion” as used in the present invention.
- the substrate transport device 4 includes a pair of conveyors 4a supported by the base 2, and a substrate holding device (not shown) provided in the vicinity of the conveyor 4a.
- the conveyor 4a sends the substrate 3 from one end side (right end side in FIG. 1) in the X direction of the base 2 to the other end side.
- the substrate holding device raises and holds the substrate 3 transported to the central portion in the X direction by the conveyor 4a from the conveyor 4a.
- the operations of the substrate holding device and the conveyor 4a are controlled by a control device 8 disposed inside the base 2.
- the conveyor 4a constitutes a “conveying section” in the present invention.
- the coating device 6 includes a head unit 11 that moves in the horizontal direction above the base 2 and a coating head 12 (see FIG. 2) provided on the head unit 11.
- a mechanism for supporting and driving the head unit 11 will be described.
- fixed rails 13 extending in the Y direction above the conveyor 4a are provided at both ends of the base 2 in the X direction.
- a head support member 14 extending in the X direction is supported by these fixed rails 13 so as to be movable in the Y direction.
- One fixed rail 13 is provided with a Y-direction drive device 15 for driving the head support member 14.
- the Y-direction drive device 15 is fixed to the head support member 14 in a state of being screwed to the ball screw shaft 16 and a ball screw shaft 16 extending in the Y direction, a Y-axis servomotor 17 that drives the ball screw shaft 16. A ball screw nut 18 and the like are provided. The operation of the Y-axis servomotor 17 is controlled by the control device 8.
- the head support member 14 includes a head unit 11 having a coating head 12 to be described later, and an X-direction drive device 21 for driving the head unit 11.
- the head unit 11 includes a frame 22 supported by the head support member 14 described above so as to be movable in the X direction, and a plurality of parts supported by the frame 22.
- the X-direction drive device 21 that drives the head unit 11 includes a ball screw shaft 23 extending in the X direction, an X-axis servo motor 24 that drives the ball screw shaft 23, and a frame screwed to the ball screw shaft 23.
- a ball screw nut 25 fixed to 22 is provided.
- the operation of the X-axis servomotor 24 is controlled by the control device 8.
- the head unit 11 moves in the X direction by driving by the X direction driving device 21, and moves in the Y direction together with the head support member 14 by driving by the Y direction driving device 15.
- the frame 22 of the head unit 11 constitutes a “moving part” in the present invention.
- the plurality of components supported by the frame 22 of the head unit 11 include a coating nozzle 31 that constitutes a part of the coating head 12, and a lifting device 32 that moves the coating nozzle 31 in the vertical direction. And the camera 33 and the like.
- the coating head 12 includes a coating nozzle 31 and a syringe 35 connected to the coating nozzle 31 via a pipe 34.
- the coating nozzle 31 allows the coating solution 5 to flow downward from the lower end, and is supported on the frame 22 of the head unit 11 via the movable bracket 36 so as to be movable in the vertical direction.
- the coating liquid 5 that has come out from the lower end of the coating nozzle 31 is applied to the coating position of the substrate 3 or the coating position of the dot station 7 described later.
- the syringe 35 stores the coating liquid 5 such as cream solder or adhesive, and is fixed to the frame of the head unit 11. Cream solder is for mounting terminals of electronic components (not shown) on the substrate 3. The adhesive is for bonding the package part of the electronic component to the substrate 3. Although not shown, the syringe 35 is connected to an air supply source that supplies compressed air via a switching valve.
- Cream solder is for mounting terminals of electronic components (not shown) on the substrate 3.
- the adhesive is for bonding the package part of the electronic component to the substrate 3.
- the syringe 35 is connected to an air supply source that supplies compressed air via a switching valve.
- the coating liquid 5 in the syringe 35 is pushed out from the syringe 35 to the pipe 34 when pressurized air is supplied into the syringe 35 from an air supply source. Then, the coating liquid 5 is sent to the coating nozzle 31 through the pipe 34 and discharged from the lower end of the coating nozzle 31.
- the lifting device 32 moves the application nozzle 31 in the vertical direction together with the movable bracket 36 by the power of a servomotor (not shown). The operation of the servo motor and the operations of the pressurizing device and the switching valve described above are controlled by the control device 8.
- the control device 8 changes the opening / closing timing of the switching valve when controlling the coating amount of the coating liquid.
- the time during which the switching valve is open (pressurization time of the syringe 35) is lengthened.
- When reducing the application amount shorten the time during which the switching valve is open.
- the camera 33 captures an image below the head unit 11 and sends image data to the control device 8.
- the camera 33 was applied to a recognition mark (not shown) on the substrate 3, the coating liquid 5 applied on the substrate 3, and a coating paper 41 (see FIGS. 2 and 3) of the dot station 7 described later.
- the coating liquid 5 and the like are imaged.
- This camera constitutes the “imaging unit” referred to in the present invention.
- the dot station 7 is disposed on the base 2 on the front side of the substrate transfer device 4.
- the position of the dot station 7 is positioned within the movable range of the head unit 11 as viewed from above.
- the dot station 7 according to this embodiment includes a box-shaped cover 41, a coated paper 41 and a paper feeding device 43 accommodated in the cover 42.
- a hole 44 for exposing a part of the application paper 41 is formed at the upper end of the cover 42.
- a support member 45 for supporting the application paper 41 when the application liquid 5 is applied to the application paper 41 is provided in the hole 44.
- the support member 45 is formed in a rectangular plate shape (see FIG. 5) when viewed from above, and is attached to the cover 42 while being held by the holder 46.
- a light diffusing member 47 described later is overlaid.
- the holder 46 includes a frame member 46 a that is overlapped from the upper ends of the four sides of the support member 45 and two frame members 46 a attached to the lower end of the frame member 46 a. It is comprised by the board member 46b. The support member 45 and the light diffusion member 47 are sandwiched from above and below by the frame member 46a and the plate member 46b. The holder 46 is attached to the cover 42 in a state where the support member 45 is horizontal.
- the frame member 46a, the plate member 46b, and the cover 42 are each formed of metal.
- the coated paper 41 is formed in a strip shape with a thickness that allows light to pass through.
- the coated paper 41 constitutes a “member to be coated” as referred to in the present invention.
- One end side of the coated paper 41 is wound up in a roll shape and is rotatably supported by a support shaft 48 of the paper feeding device 43.
- the other end side of the coated paper 41 is wound around a winding shaft 49 of the paper feeding device 43.
- the hole 44 of the cover 42 is located between the support shaft 48 and the winding shaft 49 as viewed from above.
- the paper feeding device 43 that feeds the coated paper 41 includes a plurality of rollers 50.
- These rollers 50 include a plurality of driven rollers 50a for changing the moving direction of the application paper 41, a driving roller 50b, and a tension roller 50c for pressing the application paper 41 against the driving roller 50b.
- the driving roller 50b rotates as the power of the motor 51 is transmitted through a plurality of gears 52-54.
- the operation of the motor 51 is controlled by the control device 8.
- the take-up shaft 49 that winds the application paper 41 rotates in synchronization with the drive roller 50b.
- a lighting device 61 is provided in the cover 42 and below the support member 45.
- the lighting device 61 includes a plurality of LEDs 62 and a mirror 63.
- the LED 62 is supported by the cover 42 in a state where light is mainly irradiated in the horizontal direction.
- the mirror 63 is supported by the cover 42 in a state where the light of the LED 62 is reflected toward the upper support member 45 side.
- the lighting device 61 constitutes a “light source” in the present invention.
- the support member 45 described above includes a plate-shaped core member 64 and a coating layer 65 that covers both surfaces of the core member 64.
- the core member 64 of the support member 45 is made of a transparent plastic. As this transparent plastic, for example, acrylic can be used.
- the coating layer 65 is a layer of an antistatic agent having translucency, and is formed of, for example, a surfactant.
- the coating layer 65 may be provided on a part of the support member 45. That is, the coating layer 65 may be provided on at least one of the upper surface, the lower surface, and the intermediate surface of the support member 45. Providing on the intermediate surface is formed by dividing the support member 45 in the vertical direction, and the coating layer 65 between a half portion located above the support member 45 and a half portion located below the support member 45. Means to be sandwiched.
- the support member 45 according to this embodiment is provided with the coating layer 65 on the upper surface and the lower surface, the work of assembling the support member 45 to the dot station 7 can be easily performed. This is because the coating layer 65 is thin and is formed on the support member 45 in a state where the support member 45 can be seen through, and it is difficult to determine the presence or absence of the coating layer 65. That is, since the coating layers 65 are provided on both surfaces of the support member 45, it is not necessary to confirm the presence or absence of the coating layer 65, and thus the support member 45 can be easily assembled to the dot station 7 as described above. .
- the coating layer 65 absorbs moisture in the air and becomes a conductive material layer.
- the conductive material layer is electrically connected to the cover 42 via the holder 46 by attaching the support member 45 to the cover 42 by the holder 46. For this reason, the support member 45 can prevent charging.
- the light diffusing member 47 stacked on the lower surface of the support member 45 includes a plate-shaped core material 66 and a chemical mat layer 67 that covers both surfaces of the core material 66.
- the core material 66 of the light diffusion member 47 is formed in a plate shape from PET (polyethylene terephthalate).
- the core member 66 is formed in a size that covers the lower surface of the support member 45.
- an irregular reflection material 68 is mixed.
- the irregular reflection material 68 is for irregularly reflecting light. For this reason, when the light from the illumination device 61 is irradiated onto the light diffusing member 47 from below, the light is irregularly reflected and guided to the support member 45. That is, since the shape of the light spot formed by the LED 62 is blurred, when the support member 45 is viewed from above, the entire region of the light diffusing member 47 appears to shine in the same color.
- the application is attempted in the dot station 7 before the application liquid 5 is applied to the substrate 3. That is, the coating liquid 5 is applied to the coating paper 41 of the dot station 7 under the same conditions as when the coating liquid 5 is applied to the substrate 3.
- the coated paper 41 is fed by a predetermined amount by the paper feeding device 43 in a state where a part of the coated paper 41 overlaps the support member 45.
- the support member 45 can prevent charging. For this reason, even if static electricity is generated due to friction between the application paper 41 and the support member 45, the application paper 41 and the support member 45 are not charged.
- Application of the application liquid 5 is performed by moving the head unit 11 onto the dot station 7 and lowering the application nozzle 31 while the syringe 35 is pressurized. At this time, since the application paper 41 is not charged with static electricity, the application liquid 5 is not repelled. For this reason, the coating liquid 5 is applied to the shape obtained by transferring the shape of the coating nozzle 31 onto the coating paper 41 (in a dotted pattern). After the coating liquid 5 is applied, the illumination device 61 is turned on, the head unit 11 is moved, and the camera 33 is positioned above the coating paper 41. The camera 33 images the coating liquid 5 applied to the coating paper 41 from above.
- the light from the illuminating device 61 is guided to the coated paper 41 through the support member 45 while being diffused by the light diffusing member 47.
- the coating liquid 5 applied to the coating paper 41 appears as a shadow in a bright background having a uniform color. That is, the outline of the dot-shaped coating solution is imaged by the camera.
- the camera 33 sends image data obtained by imaging to the control device 8.
- the control device 8 analyzes the image data to determine the size of the coating liquid 5 and adjusts the pressurizing time (the coating amount of the coating liquid 5) of the syringe 35 based on this size.
- the support member 45 of the dot station 7 has a property capable of preventing charging. For this reason, in this dot station 7, even if static electricity is generated when the application paper 41 is fed on the support member 45, the application paper 41 and the support member 45 are not charged. For this reason, the coating liquid 5 is applied to the shape obtained by transferring the shape of the coating nozzle 31 onto the coating paper 41 (in a dotted pattern). Therefore, in the dot station 7 according to this embodiment, the size of the coating liquid 5 applied in a dot shape can always be measured with high accuracy.
- the support member 45 includes a coating layer 65 formed on a part thereof and made of an antistatic agent. For this reason, since a part of the support member 45 is covered with the antistatic agent, the support member 45 becomes more difficult to be charged.
- the dot station 7 according to this embodiment includes a light diffusion member 47 that covers the lower surface of the support member 45 and has a property of diffusing light. For this reason, since the application paper 41 can be directly stacked on the upper surface of the support member 45, the application liquid 5 can be applied to the application paper 41 under the same conditions as when the application liquid 5 is applied to the substrate 3. Therefore, in the dot station 7 according to this embodiment, the size of the coating liquid 5 can be measured with higher accuracy.
- the support member 45 according to this embodiment is formed in a plate shape.
- a light diffusing member 47 is provided between the support member 45 and the lighting device 61. Therefore, according to this embodiment, the light from the illumination device 61 is guided to the application paper 41 via the support member 45 in a state where the light is diffused by the light diffusion member 47.
- the coating solution 5 applied to the coating paper 41 is viewed from above, the coating solution 5 appears as a shadow in a bright background of uniform color. Accordingly, the dot station 7 according to this embodiment can accurately measure the size of the applied coating solution 5 because the contour of the coating solution 5 is correctly imaged by the camera 33.
- the dispenser 1 takes an image of the coating liquid 5 applied to the coating paper 41 with the camera 33 and measures the size of the coating liquid 5. Based on the size of the coating liquid 5, The coating amount is adjusted. For this reason, according to this embodiment, it is possible to provide a dispenser in which the coating amount of the coating liquid 5 is always an appropriate amount.
- the light diffusing member can be formed as shown in FIG. In FIG. 8, members that are the same as or equivalent to those described with reference to FIGS. 1 to 7 are given the same reference numerals, and detailed descriptions thereof are omitted as appropriate.
- the light diffusing member 47 shown in FIG. 8 is formed in a sheet shape or a film shape thinner than the support member 45. That is, the thickness t1 of the light diffusing member 47 is formed to be thinner than the thickness t2 of the support member 45.
- this light diffusing member 47 is not shown in detail, as with the light diffusing member when the first embodiment is adopted, a plastic core material and a chemical mat that covers the front and back of the core material Layer 67.
- the light diffusion member 47 is affixed to the lower surface of the support member 45.
- an adhesive 71 can be used.
- the pressure-sensitive adhesive 71 is desirably provided in a state where the thickness is uniform over the entire region of the light diffusing member 47 in order to prevent unevenness of light.
- these members can be easily handled as one assembly. Therefore, by adopting this embodiment, the assembly operation of the dot station 7 is facilitated even though the light diffusion member 47 formed separately from the support member 45 is provided.
- the thickness t1 of the light diffusion member 47 according to this embodiment is formed to be thinner than the thickness t2 of the support member 45. For this reason, although the light diffusing member 47 formed separately from the support member 45 is used, the vertical thickness of the portion supporting the support member 45 can be reduced. Therefore, in the dot station 7 according to this embodiment, the support member 45 can be positioned at the optimum height even though the illumination device 61 is provided below the support member 45.
- the optimum height is a height at which the application paper 41 on the support member 45 is positioned at the same height as the substrate 3 on the substrate transport device 4.
- a commercially available product having a simple structure can be used as the light diffusing member 47 that is thinner than the support member 45. Therefore, although the dot station 7 according to this embodiment includes the light diffusing member 47, the manufacturing cost is kept low.
- the application trial apparatus according to the present invention can be provided in an electronic component mounting apparatus as shown in FIGS. 9 and 10, members identical or equivalent to those described with reference to FIGS. 1 to 8 are given the same reference numerals, and detailed descriptions thereof are omitted as appropriate.
- the electronic component mounting apparatus 81 shown in FIGS. 9 and 10 is configured by mounting various devices to be described later on the base 2.
- the base 2 supports the substrate transfer device 4, the electronic component supply device 82, the component moving device 84 having the coating head 12 and the plurality of suction heads 83, the dot station 7 as the coating trial device according to the present invention, and the like. is doing.
- the base 2 corresponds to the “base portion” in the present invention
- the substrate transfer device 4 corresponds to the “transport portion” in the present invention.
- the electronic component supply device 82 corresponds to an “electronic component supply unit” in the present invention.
- the electronic component supply device 82 supplies the electronic component 85 (see FIG. 10) within a movable range of the suction head 83 described later.
- the electronic component supply device 82 can be constituted by a plurality of tape feeders 82a, for example.
- the component moving device 84 includes a head unit 11 that moves in the horizontal direction above the base 2.
- the head unit 11 includes a frame 22, a plurality of suction heads 83 supported by the frame 22, a coating head 12, a camera 33, and the like.
- the frame 22 constitutes the “moving part” in the present invention.
- the mechanism that drives the head unit 11 while supporting it is the same as the mechanism when the first embodiment is adopted.
- the operations of the component moving device 84 and the electronic component supply device 82 are controlled by the control device 8.
- the plurality of suction heads 83 are supported by the frame 22 so as to be movable up and down, and are supported so as to be rotatable about an axis in the vertical direction.
- a suction nozzle 86 for sucking the electronic component 85 is provided at the lower end of the suction head 83.
- the coating head 12 is for coating the substrate 3 with the coating solution 5 such as cream solder or adhesive.
- the camera 33 is supported by the frame 22 in a state where an image below the head unit 11 is captured. The camera 33 images the recognition mark on the substrate 3 and the coated paper 41 on the dot station 7.
- the coating head 12 and the camera 33 are the same as the coating head and camera used in the first embodiment.
- the electronic component 85 is attracted by the electronic component supply apparatus 82 and mounted on the substrate 3.
- the electronic component mounting apparatus 81 applies the application liquid 5 to the application paper 41 of the dot station 7 by the application nozzle 31.
- the coating liquid 5 is applied to the shape obtained by transferring the shape of the coating nozzle 31 onto the coating paper 41 (in a dotted pattern).
- the electronic component mounting apparatus 81 takes an image of the coating liquid 5 applied to the coating paper 41 with the camera 33 and measures the size of the coating liquid 5, and the coating liquid 5 is measured based on the size of the coating liquid 5. 5 is adjusted. Therefore, according to this embodiment, since the application amount of the coating liquid 5 can be adjusted using the dot station 7, an electronic component mounting apparatus in which the application amount of the coating liquid 5 is always an appropriate amount can be provided.
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- Manufacturing & Machinery (AREA)
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- Coating Apparatus (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
- Supply And Installment Of Electrical Components (AREA)
Abstract
Description
塗布ノズルは、クリーム半田や接着剤などの塗布液がその塗布ノズルの下端から半球状に溢れ出た状態で基板に向けて下降する。塗布液は、塗布ノズルが基板に接近することによって基板に付着する。すなわち、上述した塗布装置は、塗布液を基板に点状に塗布する。
被塗布部材は、薄い帯状の紙が用いられている。この紙は、光が透過可能なものである。この紙からなる被塗布部材は、ロール状に巻き取られており、塗布液が塗布されるときに、送り機構によって平坦な板状の支持部材の上に所定量だけ送られる。この送り機構は、被塗布部材を所定の長さずつ長手方向に送る。
したがって、本発明に係る塗布試行装置においては、点状に塗布された塗布液の大きさを常に高い精度で測定できる。
以下、本発明に係る塗布試行装置の一実施の形態を図1~図7によって詳細に説明する。この実施の形態においては、本発明に係る塗布試行装置をディスペンサに装備する場合の一例について説明する。
基台2のX方向の両端部には、図1に示すように、コンベア4aの上方でY方向に延びる固定レール13がそれぞれ設けられている。これらの固定レール13には、X方向に延びるヘッド支持部材14がY方向に移動自在に支持されている。また、一方の固定レール13には、ヘッド支持部材14を駆動するためのY方向駆動装置15が設けられている。
ヘッド支持部材14は、後述する塗布ヘッド12を有するヘッドユニット11と、このヘッドユニット11を駆動するためのX方向駆動装置21とを備えている。
塗布ヘッド12は、塗布ノズル31と、この塗布ノズル31にパイプ34を介して接続されたシリンジ35などによって構成されている。
塗布ノズル31は、塗布液5が下端から下方に向けて流出するもので、可動ブラケット36を介してヘッドユニット11のフレーム22に上下方向に移動可能に支持されている。塗布ノズル31がフレーム22に対して下降することにより、塗布ノズル31の下端から出た塗布液5が基板3の被塗布位置や後述するドットステーション7の被塗布位置に塗布される。
このシリンジ35は、図示してはいないが、圧縮空気を供給するエア供給源に切替バルブを介して接続されている。
昇降装置32は、サーボモータ(図示せず)の動力で可動ブラケット36ともに塗布ノズル31を上下方向に移動させる。このサーボモータの動作と、上述した加圧装置および切替バルブの動作は、制御装置8によって制御される。
カメラ33は、ヘッドユニット11の下方を撮像し、画像データを制御装置8に送る。このカメラ33は、基板3の認識用マーク(図示せず)や基板3上に塗布された塗布液5と、後述するドットステーション7の塗布紙41(図2および図3参照)に塗布された塗布液5などを撮像する。このカメラによって、本発明でいう「撮像部」が構成されている。
この塗布紙41を送る紙送り装置43は、図3に示すように、複数のローラ50を備えている。これらのローラ50は、塗布紙41の移動する方向を変えるための複数の従動ローラ50aと、駆動用ローラ50bと、この駆動用ローラ50bに塗布紙41を押し付けるためのテンションローラ50cなどである。駆動用ローラ50bは、図4に示すように、モータ51の動力が複数の歯車52~54を介して伝達されて回転する。モータ51の動作は、制御装置8によって制御される。塗布紙41を巻き取る巻取軸49は、駆動ローラ50bと同期して回転する。
ケミカルマット層67には、乱反射材68が混入されている。この乱反射材68は、光を乱反射させるものである。このため、この光拡散部材47に照明装置61の光が下方から照射されると、光が乱反射して支持部材45に導かれる。すなわち、LED62からなる光点の形状がぼやけるから、支持部材45を上方から見ると、光拡散部材47の全域が同一色に光って見える。
塗布液5が塗布された後、照明装置61が点灯し、ヘッドユニット11が移動してカメラ33が塗布紙41の上方に位置付けられる。カメラ33は、塗布紙41に塗布された塗布液5を上方から撮像する。
制御装置8は、この画像データを解析して塗布液5の大きさを求め、この大きさに基づいてシリンジ35の加圧時間(塗布液5の塗布量)を調整する。
このため、この実施の形態によれば、照明装置61の光が光拡散部材47によって拡散された状態で支持部材45を介して塗布紙41に導かれる。この塗布紙41に塗布された塗布液5を上方から見ると、均一な色からなる明るい背景の中に塗布液5が影となって現れる。したがって、この実施の形態によるドットステーション7は、塗布液5の輪郭がカメラ33によって正しく撮像されるから、塗布された塗布液5の大きさをより一層高い精度で測定可能なものとなる。
このため、この実施の形態によれば、塗布液5の塗布量が常に適量になるディスペンサを提供することができる。
光拡散部材は、図8に示すように形成することができる。図8において、前記図1~図7によって説明したものと同一もしくは同等の部材については、同一符号を付し詳細な説明を適宜省略する。
粘着剤71は、光のむらが生じることを防ぐために、光拡散部材47の全域に厚みが均一になる状態で設けられることが望ましい。
この実施の形態においては、光拡散部材47が支持部材45に貼り付けられているから、これらの部材を一つの組立体として簡単に取り扱うことが可能になる。したがって、この実施の形態を採ることにより、支持部材45とは別体に形成された光拡散部材47を備えているにもかかわらず、ドットステーション7の組立作業が容易になる。
本発明に係る塗布試行装置は、図9および図10に示すように電子部品実装装置に設けることができる。図9および図10において、前記図1~図8によって説明したものと同一もしくは同等の部材については、同一符号を付し詳細な説明を適宜省略する。
部品移動装置84は、基台2の上方で水平方向に移動するヘッドユニット11を備えている。ヘッドユニット11は、フレーム22と、このフレーム22に支持された複数の吸着ヘッド83、塗布ヘッド12およびカメラ33などを備えている。フレーム22が本発明でいう「移動部」を構成している。このヘッドユニット11を支持しながら駆動する機構は、第1の実施の形態を採るときの機構と同等のものである。この部品移動装置84と電子部品供給装置82の動作は、制御装置8によって制御される。
塗布ヘッド12は、基板3にクリーム半田や接着剤などの塗布液5を塗布するためのものである。カメラ33は、ヘッドユニット11の下方を撮像する状態でフレーム22に支持されている。このカメラ33は、基板3の認識マークやドットステーション7の塗布紙41を撮像する。これらの塗布ヘッド12とカメラ33は、第1の実施の形態を採るときの塗布ヘッドおよびカメラと同等のものが用いられている。
したがって、この実施の形態によれば、ドットステーション7を用いて塗布液5の塗布量を調整できるから、塗布液5の塗布量が常に適量になる電子部品実装装置を提供することができる。
Claims (7)
- 光が透過可能に形成されるとともに上面が平坦に形成された支持部材と、
前記支持部材の上面に重ねられた状態で塗布液が塗布される被塗布部材と、
前記支持部材に下方から光を照射する光源とを備え、
前記支持部材は、帯電を防止可能な性質を有することを特徴とする塗布試行装置。 - 請求項1記載の塗布試行装置において、
前記支持部材は、その一部に設けられ、帯電防止剤からなるコーティング層を含むことを特徴とする塗布試行装置。 - 請求項1または請求項2記載の塗布試行装置において、
前記支持部材の下面を覆い、光が拡散する性質を有する光拡散部材をさらに備えていることを特徴とする塗布試行装置。 - 請求項3記載の塗布試行装置において、
前記光拡散部材は、前記支持部材に貼り付けられていることを特徴とする塗布試行装置。 - 請求項4記載の塗布試行装置において、
前記光拡散部材の厚さは、前記支持部材の厚さより薄く形成されていることを特徴とする塗布試行装置。 - 請求項1ないし請求項5のうちいずれか一つに記載された塗布試行装置と、
前記塗布試行装置を支持する基台部と、
前記基台部に支持され、前記基台部の上で基板を水平方向に搬送する搬送部と、
前記基台部に支持され、前記基台部の上方で水平方向に移動する移動部と、
前記移動部に昇降可能に支持され、塗布液を予め定めた基板および被塗布部材の被塗布位置に塗布する塗布ノズルと、
前記移動部に支持され、前記基台部の基板および前記塗布試行装置の被塗布部材の塗布液を撮像する撮像部と、
前記撮像部によって撮像された塗布液の画像データに基づいて塗布液の大きさを測定し、この塗布液の大きさに基づいて塗布液の塗布量を制御する制御装置とを備えていることを特徴とするディスペンサ。 - 請求項1ないし請求項5のうちいずれか一つに記載された塗布試行装置と、
前記塗布試行装置を支持する基台部と、
前記基台部に支持され、前記基台部の上で基板を水平方向に搬送する搬送部と、
前記基台部に支持され、前記移動部の移動範囲の中に電子部品を供給する電子部品供給部と、
前記基台部に支持され、前記基台部の上方で水平方向に移動する移動部と、
前記移動部に昇降可能に支持された実装ヘッドと、
前記実装ヘッドの下端部に設けられ、前記電子部品を前記電子部品供給部で吸着するとともに前記基板に実装する吸着ノズルと、
前記移動部に昇降可能に支持され、塗布液を予め定めた基板および被塗布部材の被塗布位置に塗布する塗布ノズルと、
前記移動部に支持され、前記基台部の基板および前記塗布試行装置の被塗布部材の塗布液を撮像する撮像部と、
前記撮像部によって撮像された塗布液の画像データに基づいて塗布液の大きさを測定し、この塗布液の大きさに基づいて塗布液の塗布量を制御する制御装置とを備えていることを特徴とする電子部品実装装置。
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