JP2001068900A - Mounted part checking method and device, and lighting equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To more accurately detect whether a part resides or not on a printed wiring board by a method wherein the mounted surface of a printed wiring board is irradiated with lighting rays which contain light of the same color with resist applied onto the mounted surface, and the reflected light from the surface is detected by a monochromatic image sensing means to form a monochromatic picture image, and it is detected based on the monochromatic picture image whether a part resides or not. SOLUTION: An lighting equipment 25 and a monochromatic video camera 26 are provided above a part check device. The lighting equipment 25 is equipped as light sources with a large number of light emitting diodes 36a, 36b of two types which emit green light and red light respectively in a case where resist is green. A lighting ray is green, and when resist applied on a mounting surface 23a is green, it appears as a whitish gray image on a monochromatic picture scope. In a case where a lighting ray is green, a black part appears as a black image on a monochromatic picture scope, a brown part appears as a gray image, and a soldered part appears as a white image. Therefore, if the resist is green, and when light containing a green ray is used as a lighting ray, a brightness difference arises between resist and a part 48, so that it can be detected whether the part 48 resides or not.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting illumination light containing light of a similar color to the color of a resist used on a mounting surface of a printed wiring board on which components such as integrated circuits, semiconductor elements, and resistors are mounted. A mounting component inspection method of irradiating a surface, receiving light reflected from the mounting surface by a black-and-white photographing means, forming a black-and-white image, and detecting the presence or absence of a component to be mounted on the mounting surface based on the black-and-white image Also, the present invention relates to a mounted component inspection device and a lighting device suitable for use in the inspection device.

[0002]

2. Description of the Related Art Conventionally, as a mounted component inspection apparatus for detecting the presence or absence of a component to be mounted on a printed wiring board on which components such as an integrated circuit and a resistor are mounted, for example, a device as shown in FIG. It has been known. The mounted component inspection apparatus 1 includes a video camera 2 for color photographing, a lighting device 3 for irradiating illumination light toward a mounting surface 4a of a printed wiring board 4, and the like. The lighting fixture 3 includes a holder member 5 formed in a trumpet shape, and a plurality of light emitting diodes (LEDs) for illumination attached to an inner peripheral surface of the holder member 5.
6.

[0003] A large number of light emitting diodes 6 are divided into a plurality of sets and are arranged on the same circumference for each set, thereby forming seven sets of annular illuminating portions 6a to 6g.
The seven sets of annular illuminators 6a to 6g are arranged concentrically with different diameters from each other, and constitute a light source having a trumpet shape as a whole. A red light emitting diode that emits red light is used as the light emitting diode 6 that constitutes this light source, and the whole is a red light source that emits red light.

On the other hand, on the printed wiring board, a wiring pattern for passing electricity in a predetermined direction, through holes for electrically connecting the upper and lower surfaces of the board, and terminals of components to be mounted are placed. A pad and a resist or the like covering almost the entire mounting surface except for the pad are provided.
As shown in FIGS. 6A and 6B, the pad portions 8a and 8b of the printed wiring board 4 vary depending on the type of the component, but in the case of the component 7 having terminals 7a and 7b at both ends such as a resistor, respectively. Two sets make up one set. A conductive portion 9 connected to the wiring pattern is provided substantially at the center of each of the pad portions 8a and 8b.

A pair of pad portions 8a and 8b are provided in parallel at a predetermined interval, and a substantially middle portion of the pad portion 8a or 8b is provided with a signal indicating whether or not a predetermined component 7 is mounted at a predetermined position. Silk mark 10 for detecting (presence / absence). The silk mark 10 is generally mounted on the mounting surface 4a.
Is formed by silk-printing a bright color (for example, white) so that a large luminance difference is generated between the resist 11 and the resist 11 that covers most of the pattern. On the other hand, as the color of the resist 11, green is generally adopted.

The presence or absence of the component 7 to be mounted on the printed wiring board 4 is detected by the above-described mounted component inspection apparatus 1 as follows. That is, FIG.
As shown in (2), the mounting surface 4a of the printed wiring board 4 faces the lower part of the lighting fixture 3, and all the light emitting diodes 6 emit light to irradiate the mounting surface 4a. The mounting surface 4a illuminated by the luminaire 3 is photographed by the color video camera 2, and a part based on the image information of the mark detection area 12 corresponding to the silk mark 10 at a predetermined position is obtained from the image obtained thereby. 7 is determined.

At this time, as shown in FIG.
When a predetermined component 7 is mounted at a predetermined position a, the silk mark 10 is covered by the component 7. Therefore, the black portion of the component 7 is captured in the mark detection area 12 of the color video camera 2, and the silk mark 10 is not displayed on the image. Since the silk mark 10 is not displayed on the mark detection area 12, the component 7
Is mounted at a predetermined position. In this case, since the luminance difference between the black color of the component 7 and the green color of the resist 11 shown in the image is small, it is necessary to recognize the component 7 to the same extent as the resist 11 and clearly know the existence of the component 7. Can be.

On the other hand, as shown in FIG. 6B, when the predetermined component 7 is not mounted at a predetermined position on the mounting surface 4a, the silk mark 10 is exposed. Therefore, the silk mark 10 is displayed on the mark detection area 12 of the image of the color video camera 2. This silk mark 10
Is displayed on the mark detection area 12, it is possible to detect that the component 7 is not mounted at a predetermined position.

[0009]

However, in such a conventional mounted component inspection apparatus 1, a silk mark 10 is printed and provided at a predetermined position on the printed wiring board 4, and the component is covered so as to cover the silk mark 10. 7 is mounted, red light is illuminated on the mounting surface, the reflected light is photographed by the color photographing means, and the presence or absence of the component to be mounted is detected based on the luminance of the image obtained thereby. . Therefore, it takes a lot of labor and time to print and form the silk mark 10, which is required because the luminance difference between the black color of the component and the green color of the resist with respect to the red illumination is extremely small, which is uneconomical. And the productivity was poor.

In recent years, as components have been miniaturized, ultra-small components (for example, resistors having a size of 0.6 mm in length and 0.3 mm in width) have been targeted for mounting. The size of the silk mark 10 provided corresponding to such an ultra-small component becomes extremely small. On the other hand, with respect to the mounting of the component, a positional deviation is allowed within an appropriate range. Even when the mounting position of the component is slightly shifted and a part of the silk mark 10 protrudes from the component 7, the mounting of the component is determined as predetermined. May be regarded as a non-defective product within the standard. In such a case, if a part of the silk mark 10 protruding from the component 7 is detected by the mounted component inspection apparatus 1, it is excluded as a mounting defect of the component 7, so that the detection accuracy of the presence or absence of the component is improved. There is a problem that it is difficult to increase the efficiency and it is not possible to detect a shortage with good stability.

The present invention has been made in view of such conventional problems, and focuses on the color of a resist provided on a printed wiring board, and provides illumination light including light of a similar color to the color of the resist. Is irradiated on the mounting surface, and the reflected light is photographed by a black-and-white photographing means, so that the resist portion is recognized as a bright color (white or gray) so that a difference in magnitude and luminance is generated between the color of the components. Therefore, it is an object to solve the above problems.

[0012]

Means for Solving the Problems In order to solve the above-mentioned problems and the like and to achieve the above-mentioned object, the present invention relates to claim 1 of the present application.
The described mounting component inspection method irradiates the mounting surface of the printed wiring board on which the component is mounted with illumination light including light of a color similar to the color of the resist provided on the mounting surface, and is reflected by the mounting surface. The reflected light is received by a monochrome photographing means to form a monochrome image, and the presence or absence of a component to be mounted on a mounting surface is detected based on the monochrome image.

[0013] A method for inspecting a mounted component according to a second aspect of the present invention is characterized in that the resist is green and the illumination light includes green light.

A method for inspecting a mounted component according to a third aspect of the present invention is characterized in that the component is an electronic component having a black surface.

According to a fourth aspect of the present invention, there is provided a mounting component inspection apparatus for irradiating illumination light including light of a color similar to the color of a resist provided on a mounting surface of a printed wiring board to the mounting surface; It should be mounted on the mounting surface based on black-and-white photographing means for receiving the reflected light reflected on the mounting surface and forming the image as a black-and-white image and a video signal corresponding to the black-and-white image from the black-and-white image capturing means Component presence / absence determination means for determining the presence / absence of a component.

According to a fifth aspect of the present invention, in the mounting component inspection apparatus, the lighting fixture forms a ring-shaped illumination portion by arranging a plurality of light-emitting diodes on the same circumference and varies the diameter of the ring-shaped illumination portion. And a plurality of sets of annular illuminating units arranged concentrically, and among the plurality of sets of annular illuminating units, the second and third rows of annular illuminating units from the smaller diameter side receive light having a similar color to the color of the resist. It is characterized in that a light emitting diode for emitting light is arranged.

According to a sixth aspect of the present invention, there is provided the mounting component inspection apparatus, wherein the resist is green, and a green light emitting diode which emits green light is used for the annular illuminating units in the second and third rows. Features.

The lighting fixture according to claim 7 of the present application has a conical cylindrical holder member capable of covering a mounting surface of a printed wiring board on which components are mounted, and is mounted on an inner peripheral surface of the holder member. A plurality of light-emitting diodes, the plurality of light-emitting diodes being arranged on the same circumference to form a ring-shaped illuminating portion, and the ring-shaped illuminating portions being arranged concentrically with different diameters. And a light emitting diode that emits light of the same color as the color of the resist is arranged in the annular illumination portions of the second and third rows from the smaller diameter side of the plurality of annular illumination portions. It is characterized by.

The lighting apparatus according to claim 8 of the present application is characterized in that the resist is green, and a green light emitting diode that emits green light is used for the annular illuminating units in the second and third rows. I have.

With the above configuration, in the mounting component inspection method according to the first aspect of the present invention, when the illumination surface is irradiated with the illumination light and the reflected light is received by the black and white photographing means, Since the illumination light includes light of a similar color to the color of the resist on the mounting surface, the resist can be recognized as a bright color (white or gray), and
The difference in luminance from the color of the component can be increased. As a result, the boundary between the resist and the component can be clarified simply by irradiating the mounting surface with the illumination light, and the presence or absence of the component to be mounted on the mounting surface can be detected without providing a silk mark. .

In the mounted component inspection method according to the second aspect of the present invention, by irradiating the green resist with irradiation light containing green light, the resist can be recognized brightly and the boundary with the component is clarified. be able to.

According to the third aspect of the present invention, an electronic component having a black surface is used as a component, so that the luminance difference between the color of the resist and the component is increased. Differences can be clarified.

In the mounting component inspection apparatus according to the fourth aspect of the present invention, the mounting surface of the printed wiring board is illuminated with illumination light by a lighting fixture, and the reflected light is received by the black and white photographing means to convert the image into a black and white image. In this case, the resist is seen as a bright color by light of a similar color to the color of the resist on the mounting surface included in the illumination light, and the difference in luminance from the color of the component can be largely recognized. As a result, the boundary between the resist and the component can be clearly recognized by the monochrome image of the monochrome photographing means, and the presence or absence of the component to be mounted on the mounting surface can be detected without providing a silk mark.

In the mounting component inspection apparatus according to the fifth aspect of the present invention, a plurality of sets of annular illumination portions are formed by arranging a large number of light emitting diodes on the same circumference and concentrically arranging them with different diameters. Lighting diodes that emit light of the same color as the color of the resist are arranged in the annular illuminating units in the second and third rows from the small-diameter side. The resist can be seen as a bright color by light of the same color as the color of the resist on the mounting surface, and the presence or absence of the component to be mounted can be reliably detected.

In the mounted component inspection apparatus according to the sixth aspect of the present invention, by using an electronic component having a black surface as a component, the luminance difference from the color of the resist is increased to ensure the presence or absence of the component. Can be detected.

In the lighting apparatus according to the seventh aspect of the present invention, a number of light emitting diodes are mounted on the inner peripheral surface of the holder member.
By arranging light emitting diodes of the same color as the color of the resist in the annular lighting units in the second and third rows from the small diameter side among the plurality of sets of annular lighting units formed by these light emitting diodes, the light is included in the illumination light. The resist is seen as a bright color by light of a similar color to the color of the resist on the mounting surface, and the difference in luminance from the color of the component can be largely recognized.

In the lighting apparatus according to the eighth aspect of the present invention, by irradiating the green resist with irradiation light containing green light, the resist can be recognized brightly and the boundary with the component can be clarified. it can.

[0028]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show an embodiment of the present invention. FIG. 1 is a perspective view showing a cross section of a part of a lighting fixture according to a mounted component inspection apparatus, and FIG. 2 shows an entire configuration of the mounted component inspection apparatus. FIG. 3 is a block diagram showing the overall configuration of the mounted component inspection apparatus, and FIGS. 4A and 4B are explanatory diagrams showing a state of mounting components on a mounting surface of a printed wiring board.

As shown in FIG. 2, the mounted component inspection device 21
Is a frame 22 serving as an outer frame, and a printed wiring board 23 to be inspected that passes through the frame 22 in the left-right direction.
A substrate supply device 24 as a substrate transport means for transporting
A lighting fixture 25 for irradiating the supplied printed wiring board 23 with illumination light; a black-and-white video camera 26 showing a specific example of a black-and-white photographing means for photographing the mounting surface 23a illuminated by the lighting fixture 25; Video camera display 27 for displaying black-and-white images taken at 26
And a keyboard 28 for inputting control information, an inspection information display 29 for displaying information and the like input by the keyboard 28, and the like.

The frame 22 of the mounting component inspection device 21
It consists of a housing having left and right doors 30 on the front surface, and a drawer plate 31 protruding forward is attached to the upper part of the doors 30. A keyboard 28 for inputting operation information for controlling the operation of the mounted component inspection device 21 is placed on the drawer plate 31. A mouse 32 is connected to the keyboard 28 and can be controlled by the mouse 32. 33 is the frame 22
It is a leg that can perform height adjustment.

At both ends of the rear portion of the frame 22, support columns 22a which are raised upward are provided. The left and right support columns 22a are provided integrally with shelf plates 34 protruding forward like eaves. The video camera display 27 and the inspection information display 29 are placed side by side on the shelf 34.

A substrate supply device 24 is provided above the frame 22 so as to penetrate in the left-right direction.
The board supply device 24 has a large number of transport tables 24a on which the printed wiring boards 23 are placed, and the printed wiring boards 23 are individually placed on each of the transport tables 24a and transported to the inspection position. . This transport table 24a
Is a board moving means (FIG. 3) which is a front-back direction moving mechanism at a component inspection position set at a substantially central portion of the frame 22.
Is indicated by reference numeral 50. ), It is possible to reciprocate a predetermined distance in the front-rear direction Y indicated by the arrow Y. A lighting fixture 25 and a black-and-white video camera 26 are arranged above the component inspection position.

As shown in FIG. 1, the luminaire 25 is a specific example of a holder member 35 formed in a conical cylindrical shape like a trumpet, and a light source attached to the inner peripheral surface of the holder member 35. Two types of many light emitting diodes 36a, 36
b, and an illumination cover 37 that covers the back side of the holder member 35. One type of light emitting diode 36a is a green light emitting diode 36a that emits green light, and another type of light emitting diode 36b is a red light emitting diode 36b that emits red light. These light emitting diodes 36a and 36b are arranged on the same circumference separately for each color, thereby forming seven sets of annular illumination parts 38a to 38g.

The seven annular illumination portions 38a to 38g are formed so as to have different diameters for each of the annular illumination portions, and are arranged concentrically with each other. Therefore, many light emitting diodes 36
a and 36b constitute a conical shape as the whole light source. Further, among the seven sets of annular illuminating portions 38a to 38g, the annular illuminating portions 38 in the second and third rows from the inside, which is the smaller diameter side.
Green light emitting diodes 36a are arranged at b and 38c. And the other five sets of annular illumination parts 38a, 38d
To 38 g, that is, the innermost annular illumination part 38a of the first row
And four sets of annular illumination portions 38d in the fourth to seventh rows from the inside
A red light-emitting diode 36b is arranged at 〜38 g.

Each light emitting diode 36a, 36b
Is inserted through a through hole provided in the holder member 35 with the light-emitting portion facing inward, as shown in FIG. The terminals of the light emitting diodes 36a and 36b opposite to the light emitting portions are exposed on the back side of the holder member 35, and are electrically connected to the illumination control means from the back side. The illumination cover 37 covers the outside of the back surface of the holder member 35 in the radial direction. The illumination cover 37 is formed of a conical cylinder having a size similar to that of the holder member 35, and is detachably attached by a plurality of fixing screws 39.

A holder support 40 for fixing and supporting the holder member 35 is inserted through a through hole 37a provided at the center of the illumination cover 37. The holder support 40 has a round and shallow dish shape, and has a through hole 40a in the center thereof through which the lens portion 26a of the monochrome video camera 26 is inserted. The holder support 40 is superimposed on the holder member 35 such that its concave portion covers the central portion on the back side of the holder member 35, and is detachably attached by a plurality of fixing screws 41. As a result, the holder support 40
Is aligned substantially concentrically with the through hole 35a of the holder member 35.

The holder support 40 is detachably attached to the lower end of the slide base 43. The slide base 43 is reciprocally movable by a predetermined distance in the left-right direction X indicated by an arrow X by camera moving means (indicated by reference numeral 51 in FIG. 3) which is a left-right direction moving mechanism provided on the upper rear side of the frame 22. Supported. The black-and-white video camera 26 is attached to the slide base 43 with the lens unit 26a facing downward. The lens portion 26a of the black-and-white video camera 26 includes a holder support 40
Through the through-hole 40a of the holder member 35 and the through-hole 35a of the holder member 35, and protrudes to the inner surface side of the holder member 35.

As shown in FIG. 3, the substrate moving means 50 and the camera moving means 51 are connected to the control means 52,
The movement control of the substrate moving means 50 and the camera moving means 51 is executed based on the control signal output from the control means 52. The control means 52 includes, for example, a central processing unit CPU, a storage device RAM, a ROM, and an input / output device I / O.
It is provided with a microcomputer having O and the like. The video camera display 27, the keyboard 28, and the inspection information display 29 are connected to the control unit 52.

Further, the control means 52 includes an illumination control means 53 for controlling blinking of all the light emitting diodes 36a and 36b of the lighting fixture 25, and a predetermined signal by processing a monochrome image taken by the monochrome video camera 26. Is connected to an image processing means 54 for outputting When a predetermined signal is supplied from the image processing unit 54 to the control unit 52, a control signal is output from the control unit 52 to the video camera display 27, and the mounting surface captured by the monochrome video camera 26 is displayed on the screen. Is displayed with. When a predetermined command signal is input from the keyboard 28 to the control means 52, information corresponding to the command signal is displayed on the screen of the inspection information display 29.

The mounting component inspection position of the mounting component inspection apparatus 21 having such a configuration is covered by a protective cover 44. As shown in FIG. 2, the protective cover 44 is shaped like a step having a step, and has openings 44a on both side surfaces through which the substrate supply device 24 passes. The protective cover 44 is preferably formed of a transparent plastic so that the inside can be seen through.

As shown in FIGS. 4A and 4B, the printed wiring board 23 on which the mounting state of the component is inspected by this inspection apparatus has the same configuration as that of the conventional printed wiring board from which the silk marks have been removed. That is, the printed wiring board 23 has a wiring pattern for passing electricity in a predetermined direction, a through hole for electrically connecting the upper and lower surfaces of the board, and a component on which terminals of the mounted component are placed. And a pair of pad portions 45a and 45b corresponding to the number of, and a green resist 46 covering substantially the entire mounting surface 23a except for the pad portions 45a and 45b. A conductive portion 47 connected to the wiring pattern is provided substantially at the center of each of the pad portions 45a and 45b.

As the component 48 to be mounted, for example, a component having a configuration as shown in FIGS. 3 and 4A (for example, a resistor,
Capacitors, ICs, etc.). The component 48 has a black component body formed of a rectangular parallelepiped, and terminals 48a and 48b are provided at both ends in the longitudinal direction. The component 48 is placed so as to bridge between the pair of pad portions 45a and 45b. And each pad part 45
a and 45b are applied to the respective terminals 48 by the solder 49.
a, 48b and the conductive portion 47 are electrically connected to each other.

The mounting surface 23a of the printed wiring board 23
The presence / absence of the component 48 to be mounted can be easily and accurately inspected by the mounted component inspection device 21. As shown in FIG. 2, the printed wiring board 2 to be inspected
3 are placed on the transfer table 24a of the substrate supply device 24, respectively. When the substrate supply device 24 is driven by the control means 52 and the transport table 24a is transported to a predetermined position, the substrate moving means 50 is driven to drive the transport table 2a.
4a is transported backward. And the transport table 24a
Moves backward to a predetermined position, the control signal of the control means 52 is supplied to the lighting control means 53, and thereby all the light emitting diodes 36a and 36b of the lighting fixture 25 are turned on.

At the same time or before or after this, the monochrome video camera 26 is driven, and the mounting surface 23 of the printed wiring board 23 is
Photograph a. The video signal of the black-and-white video camera 26 is supplied to the control unit 52 via the image processing unit 54. The video captured by the monochrome video camera 26 is displayed on the video camera display 27 as a monochrome screen.
The lens unit 26a of the black-and-white video camera 26 is moved to a position where the component 48 is to be mounted by controlling the driving of the board moving unit 50 and the camera moving unit 51 by the control unit 52. Then, a predetermined range is photographed by the black-and-white video camera 26 around the inspection region 60 between the pair of pad portions 45a and 45b. As a result, a predetermined range of a certain mounting position is shown on the screen of the video camera display 27 as shown in FIG.

At this time, if the body of the component 48 is black, the black portion is the video camera display 27.
Are displayed as black on the screen. On the other hand, when the resist 46 on the mounting surface 23a is green, the green portion is displayed as whitish gray on the screen of the video camera display 27. This is because the light-emitting diodes 36a and 36b, which are the light sources of the lighting fixture 25, include a green light-emitting diode 36a, and the green light emitted from the green light-emitting diode 36a is applied to a resist 4 of a similar color.
It is observed by being whitish reflected at 6.

As a result, the black color of the component 48 and the resist 46
Since a relatively large luminance difference occurs between the color and the green color, the component 48 emerges from the resist 46 and the presence of the component 48 can be clearly known. Therefore, according to this inspection method, it is possible to detect whether or not there is the component 48 as it is, without providing a silk mark on the mounting surface of the printed wiring board as in the related art.

The inspection for the presence or absence of a component based on such a difference in luminance can be performed even when the component 48 is not black. Table 1 shows the relationship between the illumination color of the lighting fixture 25 and the brightness of the image of the black-and-white video camera 26.

[0048]

[Table 1]

Table 1 shows how the difference in the color of the reflection surface due to the difference in the color of the illumination appears as the difference in luminance between the black and white images of the black and white video camera 26. When the illumination color is red and the resist 46 on the mounting surface 23a is green, it appears as black in a monochrome image. Also,
In a black and white image with red illumination, black parts appear as black, and brown parts and soldered parts appear as white.
On the other hand, when the illumination color is green, the mounting surface 23a
When the resist 46 is green, it appears as a whitish gray in a black-and-white image. Then, in a black and white image in green illumination, a black component appears as black, a brown component appears as gray, and a soldered portion appears as white.

Therefore, when the resist 46 is green, by using light containing green as the illumination color,
The presence or absence of the component 48 can be easily recognized by causing a luminance difference between the resist 46 and the component 48. still,
As the color of the resist 46, generally, green is used in electronic devices, and thus, in this embodiment, the case where green is used has been described. However, other colors (for example, yellow, brown, blue, orange, etc.) may be used. It can also be used as the color of the resist. In these cases, a light-emitting diode that emits light of a similar color according to the color of the resist is used. Incidentally, there has been provided a printed wiring board in which the color of the resist is blue as halogen-free due to recent environmental problems. This is because the resist material does not contain halogen and environmental considerations are taken into consideration.

In the lighting fixture 25, the green light-emitting diodes 36a are connected to the annular lighting units 38 in the second and third rows.
Although the example of arrangement at b and 38c has been described, in such an arrangement, the largest luminance difference was obtained, and detection with good stability could be performed. This is because the green light alone lacks in brightness. Therefore, a large number of red light-emitting diodes 36b are arranged to secure the brightness of the entire lighting device, while the green light-emitting diodes 36a are efficiently arranged to achieve the above-described brightness. This is to make a difference effectively.
Further, the reason why the green light emitting diode 36a is arranged at a position relatively close to the black and white video camera 26 is that more green reflected light is incident from the lens portion 26a. Therefore, the arrangement of the green light emitting diodes 36a is not limited to that of this embodiment, but can be arranged in any one or more of the first to seventh columns.

Next, when the image information of the black and white video camera 26 is input to the control means 52 via the image processing means 54, the black and white image is displayed on the video camera display 27 and the control means 52 It is determined whether or not all of the predetermined components are mounted at the predetermined position of 23a. This is because a part of the control means 52 constitutes a component presence / absence determination means for determining the presence / absence of a component to be mounted.

The mounting surface 23a is determined by the component presence / absence determining means.
If it is determined that all of the predetermined components are mounted at the predetermined positions, the transfer table 24a is returned to the original transfer line and transferred to the next step. On the other hand, when the component presence / absence determination unit determines that the predetermined component is not mounted at at least one or more of the predetermined positions on the mounting surface 23a, the component is directly removed from the transport line by a not-shown defective product removal unit, or It is removed from the transport line in a downstream transport step.

As described above, the present invention is not limited to the above-mentioned embodiment. For example, in the above-described embodiment, an example in which a black-and-white video camera is used as the black-and-white shooting means has been described. Any device that can capture a black and white image, such as a black and white electronic still camera, can be used. Also, an example in which a resistor is used as a mounted component has been described. However, any component mounted on a printed wiring board can be applied without being affected by its shape, size, and the like. Thus, the present invention can be variously modified without departing from the spirit thereof.

[0055]

As described above, according to the first aspect of the present invention,
According to the mounting component inspection method described above, when the mounting surface of the printed wiring board is illuminated with illumination light and the reflected light is received by the black-and-white photographing means, the illumination light has a color similar to the color of the resist on the mounting surface. Since it is included, the resist can be recognized as a bright color (white or gray), and the difference in luminance from the color of the component can be increased. As a result, the boundary between the resist and the component can be clarified simply by irradiating the mounting surface with the illumination light, and the presence or absence of the component to be mounted on the mounting surface can be detected without providing a silk mark. The effect described above can be obtained.

According to the mounted component inspection method of the present invention, by irradiating the green resist with irradiation light containing green light, the resist can be recognized brightly and the boundary with the component can be clarified. Can be obtained.

According to the method for inspecting a mounted component according to the third aspect of the present invention, by using an electronic component having a black surface as a component, the luminance difference between the color of the resist and the component is increased. The effect that the difference with can be clarified can be obtained.

According to the mounting component inspection apparatus of the fourth aspect of the present invention, the illumination surface illuminates the mounting surface of the printed wiring board with illumination light, receives the reflected light with the black-and-white photographing means, and converts the image into black and white. Because the image is formed as an image, the resist can be seen as a bright color by light of a similar color to the color of the resist on the mounting surface included in the illumination light, and the difference in luminance from the color of the component can be largely recognized. Can be. As a result, a mounted component inspection apparatus capable of clearly recognizing the boundary between the resist and the component by the monochrome image of the monochrome photographing means and detecting the presence or absence of the component to be mounted on the mounting surface without providing a silk mark. The effect of being able to provide can be obtained.

According to the mounting component inspection apparatus of the fifth aspect of the present invention, a plurality of light emitting diodes are arranged on the same circumference and are arranged concentrically with different diameters, so that a plurality of sets of annular illumination units are provided. Is formed, and a light emitting diode that emits light of the same color as the color of the resist is arranged in the annular illuminating units in the second and third rows from the smaller diameter side. It is possible to provide a mounted component inspection apparatus that can view the resist in a bright color by light of a similar color to the color of the included resist on the mounting surface and can reliably detect the presence or absence of a component to be mounted. The effect can be obtained.

According to the mounting component inspection apparatus of the sixth aspect of the present invention, since the electronic component having a black surface is used as the component, the luminance difference from the color of the resist is increased to increase the luminance of the component. The effect of being able to provide a mounted component inspection apparatus capable of reliably detecting the presence or absence can be obtained.

According to the luminaire of the present invention, a large number of light emitting diodes are mounted on the inner peripheral surface of the holder member, and two or more sets of annular illuminating portions formed from these light emitting diodes are arranged from the smaller diameter side. Since the light-emitting diodes of the same color as the color of the resist are arranged in the annular illumination portions of the third and third rows, the resist is brighter due to the light of the same color as the color of the resist on the mounting surface included in the illumination light. Thus, it is possible to obtain an effect that it is possible to provide a lighting fixture capable of recognizing a large difference in luminance from the color of a component.

According to the lighting apparatus of the present invention, since the green resist is irradiated with the irradiation light including the green light, the resist can be recognized brightly and the boundary with the component can be clearly identified. The effect of being able to provide a lighting fixture that can do this can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a cross section of a part of an embodiment of a lighting fixture according to a mounted component inspection apparatus of the present invention.

FIG. 2 is an external perspective view in which a part of the entire configuration of the mounted component inspection apparatus of the present invention is sectioned.

FIG. 3 is an explanatory block diagram showing the overall configuration of the mounted component inspection apparatus of the present invention.

4A and 4B illustrate a state of mounting components on a mounting surface of a printed wiring board according to the mounted component inspection apparatus of the present invention. FIG. 4A illustrates a state after the components are mounted, and FIG. 4B illustrates a state before the components are mounted. It is a top view respectively.

FIG. 5 is an explanatory diagram showing a schematic configuration of a conventional component inspection apparatus.

6A and 6B illustrate a state of mounting components on a mounting surface of a printed wiring board according to a conventional component inspection apparatus. FIG. 6A is a plan view illustrating a state after the components are mounted, and FIG. FIG.

[Explanation of symbols]

21 mounted component inspection device, 22 frame, 23
Printed wiring board, 23a mounting surface, 24 board supply device (board transfer means), 24a transfer table, 2
5 lighting equipment, 26 black and white video camera (black and white photographing means), 26a lens unit, 27 video camera display, 28 keyboard, 29 inspection information display, 35 holder member, 36a, 36b light emitting diode, 38a to 38g annular lighting unit, 46
Resist, 48 parts, 50 substrate moving means, 5
1 camera moving means, 52 control means (component presence / absence determining means), 53 illumination control means, 54 image processing means, 60 inspection area

Claims (8)

[Claims] 1. A mounting surface of a printed wiring board on which components are mounted is irradiated with illumination light including light of a color similar to the color of a resist provided on the mounting surface, and reflected light reflected on the mounting surface. A black-and-white image is formed by receiving light from the black-and-white photographing means, and the presence or absence of a component to be mounted on the mounting surface is detected based on the black-and-white image. 2. The method according to claim 1, wherein the resist is green, and the illumination light includes green light. 3. The method according to claim 1, wherein the component is an electronic component having a black surface. 4. A lighting device for irradiating the mounting surface with illumination light containing light of a color similar to the color of a resist provided on the mounting surface of the printed wiring board, and receiving reflected light reflected on the mounting surface. Black-and-white photographing means for forming the image as a black-and-white image, and component presence / absence determining means for judging the presence or absence of a component to be mounted on the mounting surface based on a video signal corresponding to the black-and-white image from the black-and-white photographing means And a mounting component inspection apparatus characterized by comprising: 5. The lighting apparatus according to claim 1, wherein a plurality of light-emitting diodes are arranged on the same circumference to form an annular illuminating unit, and a plurality of sets of annular illuminating units are arranged concentrically with different diameters of the annular illuminating units. A light emitting diode that emits light of a color similar to the color of the resist is disposed in the second and third rows of the annular illuminating sections from the smaller diameter side of the plurality of sets of annular illuminating sections. The mounting component inspection apparatus according to claim 4, wherein 6. The mounting component according to claim 5, wherein the resist is green, and a green light emitting diode that emits green light is used for the annular illuminating units in the second and third columns. Inspection equipment. 7. A conical cylindrical holder member capable of covering a mounting surface of a printed wiring board on which components are mounted, and a number of light emitting diodes mounted on an inner peripheral surface of the holder member. A large number of light emitting diodes form an annular illuminating portion by arranging them on the same circumference, and form a plurality of sets of annular illuminating portions by concentrically arranging the annular illuminating portions with different diameters. A lighting device comprising a plurality of sets of annular illuminating units, wherein light-emitting diodes that emit light of a color similar to the color of the resist are arranged in the second and third annular illuminating units from the smaller diameter side. 8. The lighting apparatus according to claim 7, wherein the resist is green, and a green light emitting diode that emits green light is used for the annular illuminating units in the second and third rows. .