JPH06318800A - Component mounter - Google Patents

Abstract

PURPOSE:To dispense with procedure works such as adjusting the gap dimension of guide rails even with a change in kinds of boards and to enable mounting components on each board with a variety of boards transported at the same time. CONSTITUTION:A transparent jig 17 fitted with a variety of boards 31-35 is transported to a predetermined position by a conveyor belt 22. At this position the transparent jig 17 is illuminated from below by a lamp 26 and photographed from above by a camera 25. Kinds and positions of the boards 31-35 are detected from photographed images of this camera 25, whereby electronic components are mounted on each board 31-35.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component mounting apparatus for mounting a component on a board sequentially sent by a carrier.

[0002]

2. Description of the Related Art In a component mounting apparatus for mounting an electronic component on a printed wiring board, the printed wiring board is conveyed to a predetermined position by a conveying device and positioned, and then the electronic component is mounted on the printed wiring board. ing. A conventional example of this component mounting apparatus will be described with reference to FIGS.

In FIGS. 12 and 13, a pair of conveyor belts 3 and 4 which constitute a conveying device are provided inside the pair of guide rails 1 and 2, and the printed wiring board 5 has the conveyor belts 3 and 4. Placed on 4 arrow A
Is conveyed in the direction. The pair of guide rails 1 and 2 serve as a guide for the printed wiring board 5, one guide rail 2 is configured to be movable in the direction of arrow B, and the distance from the other guide rail 1 is set to the printed wiring board. 5 can be changed according to the width dimension.

When the printed wiring board 5 is conveyed to a predetermined position, that is, a position where it abuts on the stopper 6, a backup pin 7 for horizontally supporting the printed wiring board 5 without warping rises and the printed wiring board 5 Board 5
The positioning pin 8 for fixing the to the regular position rises and fits into the reference hole 5a of the printed wiring board 5. After this, the camera 10 of the mounting apparatus 9 is used to print the printed wiring board 5
Is photographed, and the accurate position of the printed wiring board 5 with respect to the component mounting device is detected based on the reference mark printed on the printed wiring board 5. Based on the position data, the mounting device 9 mounts the electronic component on the printed wiring board 5.

[0005]

In the above-described conventional component mounting apparatus, in order to insert the positioning pin 8 into the reference hole 5a for the accurate positioning of the printed wiring board 5, the printed wiring board 5 is mounted on the conveyor belt 3. , 4 need to be positioned to a certain degree at the stage of being conveyed, and for that purpose, it is necessary to adjust the distance between the guide rails 1 and 2 in accordance with the width of the printed wiring board 5. Also, the positioning pins 8 may be replaced with those having different thicknesses, or the intervals and the amount of rise may be adjusted according to the inner diameter dimension and spacing of the reference holes 5a of the printed wiring board 5 and the board thickness of the printed wiring board 5. However, there is a problem that a large amount of time is spent in so-called setup work.

The present invention has been made in view of the above circumstances, and an object thereof is to perform setup work such as adjusting the spacing between the guide rails even if the type of the board changes,
Moreover, it is an object of the present invention to provide a component mounting apparatus capable of simultaneously loading a plurality of types of substrates and mounting components on each substrate.

[0007]

The component mounting apparatus of the present invention is provided with a transparent jig to which a plurality of substrates can be attached, and a transport device for transporting the transparent jig to a predetermined position, and the transparent jig is transported to the predetermined position. A light source is provided for illuminating the formed transparent jig from one side of the front and back sides of the transparent jig, and a photographing means is provided for photographing the transparent jig conveyed to the predetermined position from the side opposite to the light source. An image processing device for detecting a substrate attached to the transparent jig by a photographed image of a photographing means is provided, and a mounting device for mounting a component on the substrate based on a detection result of the image processing device is provided. To do.

[0008]

Since the type and position of the substrate mounted on the transparent jig can be detected by photographing the transparent jig with the photographing means, setup work such as adjusting the distance between the guide rails is unnecessary. Moreover, it is possible to simultaneously carry in a plurality of types of substrates and mount components.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. 1 to 6 by applying an electronic component to a printed wiring board (hereinafter referred to as a board). The schematic configuration of the component mounting device will be described with reference to FIG. 4. The device includes a Cartesian coordinate robot 11 as a mounting device, and an electronic component 1 supplied from a component storage unit 12 by a component supply device 13.
4 is grasped by the head 15 of the robot 11, and the electronic component 14 is mounted on the substrate transported by the transport device 16.

The substrate is attached to the transparent jig 17 and carried in. As shown in FIG. 5, the transparent jig 17 is made of a rigid material such as heat-resistant glass or acrylic resin that does not bend even when a plurality of substrates are placed, and is formed in a rectangular plate shape. The substrate is attached to the transparent jig 17 by a screw fastening means. That is, a large number of screw holes 17a are formed in the transparent jig 17, and the fixing plate 18 makes the substrate transparent by screwing the mounting screws 19 passed through the fixing plate 18 into the screw holes 17a. It is pressed and fixed to the jig 17. The fixing plate 18 and the mounting screw 19 are also made of a transparent material.

On the other hand, as shown in FIGS. 1 and 2, the transfer device 16 has a conveyor belt 22 inside a pair of guide rails 21 and 21 provided on a base 20 (shown in FIG. 4) of the component mounting device. , 22 are arranged. A stopper 2 is provided between the pair of conveyor belts 22 and 22.
3 is arranged so that it can move up and down, and the conveyor belt 22
As a result, the transparent jig 17 conveyed in the direction of arrow C stops at the position where it abuts against the stopper 23. A pair of guide rails 21 and 21 are provided with side stoppers 24 for pressing the transparent jig 17 from both sides and fixing the transparent jigs 17 at positions stopped by the stoppers 23 so as to be movable in the left-right direction.

On the upper and lower sides of the position where the transparent jig 17 is stopped by the stopper 23, a board detecting C for photographing the board mounted on the transparent jig 17 is provided.
A lamp 26, which is a light source for illuminating the CD camera (hereinafter referred to as camera) 25 and the transparent jig 17 from below, is provided.
Then, the image signal output from the camera 25 is given to the image processing device 27 shown in FIG. 6, where the image processing is performed to detect the type and position of the substrate attached to the transparent jig 17. The detection information regarding the board is provided to the control device 28 that controls the Cartesian coordinate robot 11, the component supply device 13, the transfer device 16, and the like.

The head 15 of the Cartesian robot 11
As shown in FIG. 4, a CCD camera 29 is attached to the portion, and the controller 28 controls the head 15 above the substrate by the Cartesian coordinate type robot 11 based on the position information of the substrate given from the image processing device 27. And the reference mark on the substrate is photographed. Then, the image signal output from the camera 29 is applied to the image processing device 30, where it is image-processed to detect the accurate position of the substrate from the position of the reference mark and apply the detection information to the control device 28. It has become.

Next, the operation of the above configuration will be described. First, as shown in FIG. 2, the transparent jig 17 includes three substrates 31 of the same type, and one substrate 32 of each different type.
It is assumed that a total of seven boards 35 are mounted by the mounting screws 19 and the fixing plate 18 shown in FIG. When the transparent jig 17 is supplied from the pre-process device to the conveying device 16 of the component mounting device, the transparent jig 17 moves to the conveyor belt 22,
It is conveyed in the direction of arrow C by 22.

When the transparent jig 17 comes into contact with the stopper 23 set at the raised position and stops, the side stoppers 24 press the transparent jig 17 from both sides in the lateral direction to fix it. Then, the lamp 26 is turned on and the transparent jig 17 is illuminated from the lower side, so that the camera 25 captures an image as shown in FIG. Based on this image signal, the image processing device 27 detects the positions of the substrates 31 to 35 and determines the type of each substrate 31 to 35 from the shape of the captured image.

The control device 28 moves the head 15 of the Cartesian coordinate type robot 11 above each of the substrates 31 to 35 according to the position information of the substrates 31 to 35 provided from the image processing device 27, and the substrates 31 to 35. The reference mark printed on the image is photographed by the camera 29, and the image processing device 30 detects the accurate position of each of the substrates 31 to 35 based on the image signal. Then, the control device 28 controls the image processing device 3
Position information of each substrate 31 to 35 from 0 and the image processing device 2
The rectangular coordinate type robot 11 is operated according to the type information of each substrate 31 to 35 from 7 to mount each electronic component 14 supplied by the component supply device 13 at a predetermined location on a predetermined substrate.

When the mounting of the electronic components 14 on the substrates 31 to 35 is completed, the side stopper 24 releases the holding of the transparent jig 17 and the stopper 23 descends. While being conveyed in the C direction and carried out to the post-process apparatus, another transparent jig is carried in and the component mounting operation as described above is executed.

As described above, according to this embodiment, the substrates 31 to 31
35 is attached to the transparent jig 17 and conveyed, and the position and type of each substrate on the transparent jig 17 are detected by the image information of the camera 25. Therefore, a pair of guide rails 21 are formed according to the size of the substrate. , 21 does not require setup work such as changing the interval dimension, and moreover, different types of substrates can be carried in at the same time and electronic components can be mounted, thereby improving productivity.

Further, since the transparent jig 17 has a large rigidity and is unlikely to warp, the backup pin 7 shown in FIGS. 11 and 12 which is conventionally required to horizontally support the substrate is unnecessary.

7 and 8 show a second embodiment of the present invention, in which the lamp 26 is arranged below the transparent jig 17 and the camera 25 is transparent in the first embodiment. Jig 1
The lamp 26 is arranged on the upper side of the transparent jig 17 and the camera 25 is arranged on the lower side of the transparent jig 17 contrary to the arrangement on the upper side of 7. The same effect as the example can be obtained.

The transparent jig of the present invention is not limited to the structure shown in the first embodiment, but the structure shown in the third to fifth embodiments shown in FIGS. 9 to 11. May be.
In the third embodiment shown in FIG. 9, the transparent jig 36 has two upper and lower parts.
The transparent plates 37 and 38 are joined together. An inverted T-shaped engaging groove 39 is formed in the upper transparent plate 37, and a nut 40 is slidably accommodated in the engaging groove 39. Then, in order to fix the substrate, the mounting screw 19 passed through the fixing plate 18 is screwed into the nut 40 and tightened. In this way, if the screw hole side of the screw tightening means is configured by the slidable nut 40, the position of the fixing plate 18 can be freely changed according to the size of the substrate.

In the fourth embodiment shown in FIG. 10, the transparent jig 36 is the same as that in the third embodiment, but the substrate is attached by an attachment 41 made of a transparent material.
The fixture 41 has an engaging portion 41a slidably inserted into the engaging groove 39 on the lower side, and a pressing portion 41b for sandwiching the substrate between the upper transparent plate 37 and the upper portion. .

In the fifth embodiment shown in FIG. 11, the transparent jig 42 is constructed by connecting two upper and lower transparent plates 43 and 44 with a rectangular frame 45 made of a transparent material sandwiched therebetween. In this case, the space between the rectangular frame 45 and the upper and lower transparent plates 43, 44 is made airtight by a seal 46. Upper transparent plate 43
In addition to a plurality of suction holes 47 formed therein, an intake port 48 attached to the rectangular frame 45 is connected to a vacuum suction device (not shown). When the substrate is placed on the upper transparent plate 43 and the vacuum suction device is operated, the air in the rectangular frame 45 is sucked by the vacuum suction device, so that the substrate is vacuum-sucked by the suction holes 47. Note that the suction holes that are removed from the substrate are closed by a transparent plug (not shown).

[0024]

As described above, according to the present invention, a transparent jig having a substrate attached thereto is conveyed to a predetermined position, and the substrate attached to the transparent jig is photographed to detect each substrate. Therefore, every time the type of the board is changed, the setup work which is conventionally required is not necessary, and moreover, it is possible to carry in a plurality of kinds of boards at the same time and mount the components, thereby improving the productivity.

[Brief description of drawings]

FIG. 1 is a front view of a main part showing a first embodiment of the present invention.

FIG. 2 is a plan view of the main part

FIG. 3 is a diagram showing an image taken by a camera.

FIG. 4 is a perspective view showing a schematic configuration of a component mounting device.

FIG. 5 is a perspective view showing a mounting structure of a substrate on a transparent jig.

FIG. 6 is a block diagram showing a control configuration.

FIG. 7 is a view corresponding to FIG. 1 showing a second embodiment of the present invention.

FIG. 8 is a view corresponding to FIG.

FIG. 9 is a view corresponding to FIG. 5, showing a third embodiment of the present invention.

FIG. 10 is a view corresponding to FIG. 5, showing a fourth embodiment of the present invention.

FIG. 11 is a view corresponding to FIG. 5, showing a fifth embodiment of the present invention.

FIG. 12 is a view corresponding to FIG. 1 showing a conventional example.

FIG. 13 is a view corresponding to FIG.

[Explanation of symbols]

11 is a Cartesian robot (mounting device), 14 is an electronic component, 16 is a transfer device, 17 is a transparent jig, 17a is a screw hole, 18 is a fixing plate, 19 is a mounting screw (screw tightening means),
21 is a guide rail, 22 is a conveyor belt, 23 is a stopper, 24 is a side stopper, 25 is a CCD camera (imaging means), 26 is a lamp (light source), 27 is an image processing device, 28 is a control device, and 31 to 35 are Substrate, 36 is a transparent jig, 39 is an engaging groove, 40 is a nut, 41 is a fixture, 4
2 is a transparent jig, and 47 is a suction hole.

Claims (4)

[Claims] 1. A transparent jig to which a plurality of substrates can be attached, a transport device for transporting the transparent jig to a predetermined position, and a transparent jig transported to the predetermined position on both sides of the transparent jig. A light source for illuminating from one side, a photographing means for photographing the transparent jig conveyed to the predetermined position from the side opposite to the light source, and a substrate attached to the transparent jig by a photographed image of the photographing means. A component mounting apparatus comprising: an image processing device for detecting; and a mounting device for mounting a component on the substrate based on a detection result of the image processing device. 2. The component mounting apparatus according to claim 1, wherein the substrate is attached to the transparent jig by screw fastening means. 3. The component mounting apparatus according to claim 1, wherein an engaging groove is formed in the transparent jig, and the board is attached to the transparent jig by a fixture that engages with the engaging groove. 4. The transparent jig is provided with a plurality of suction holes, the suction holes are connected to a vacuum suction device, and the substrate is attached to the transparent jig by a vacuum suction force. Parts mounting device.