JPH088600A - Electronic component mounting device - Google Patents

Abstract

(57) [Summary] [Purpose] The nozzle type is checked before mounting the parts. [Configuration] A camera for acquiring a horizontal projection image of a nozzle,
A nozzle height detection unit that detects the height of the lower end of the nozzle,
A determination unit that determines the type of nozzle by integrating the image of the camera and the height of the nozzle height detection unit is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component mounting apparatus for checking a nozzle mounting error prior to mounting a component.

[0002]

2. Description of the Related Art Some electronic component mounting apparatuses have different types of nozzles mounted on a transfer head depending on the type of component.

[0003]

However, a wrong type of nozzle may be mounted due to human error or the like by the operator. In such a case, in the conventional electronic component mounting apparatus, even if there is an error in the type of nozzle, this error cannot be detected, and the nozzle does not pick up during the component mounting operation. There was a problem that a defect would occur.

Therefore, an object of the present invention is to provide an electronic component mounting apparatus capable of confirming the nozzle type before the component mounting operation.

[0005]

An electronic component mounting apparatus according to the present invention includes a camera for acquiring a horizontally projected image of a nozzle, a nozzle height detection unit for detecting the height of a lower end portion of the nozzle, and an image of the camera. A determination unit that determines the type of nozzle by combining the height of the nozzle height detection unit is provided.

[0006]

In the above structure, the nozzle of the transfer head picks up the component from the component supply unit and mounts it on the substrate, and then the horizontal projection image of the nozzle by the camera and the nozzle by the nozzle height detection unit The determination unit determines the type of nozzle from the height of the lower end. As a result of this determination, if there is an error in the type of nozzle, it is possible to replace the nozzle with a correct nozzle before the mounting operation and avoid a defect in the mounting operation.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a plan view of an electronic component mounting apparatus according to an embodiment of the present invention. In FIG. 1, 1 is a base and 2 is a base 1.
Of the rotary head, which is provided above the center of the rotary head and is index-rotated in the direction of arrow M by a driving means (not shown), 4 is a plurality of transfer heads provided on the circumference of the rotary head 2, and 3 is a circumference of the transfer head 4. A plurality of nozzles are provided downward depending on the type of the component to be adsorbed on. Reference numeral A is a component supply unit disposed at the rear portion of the base 1, 5 of which is a parts feeder for supplying the components P of different types one by one, 6 is a moving table on which the parts feeders 5 are arranged, and 8 Is a feed screw which is screwed into a feed nut 7 provided at the rear portion of the moving table 6, extends in the X direction, and is rotatably supported by the base 1, and 9 is a drive motor for rotating the feed screw 8. When the drive motor 9 is driven, the rotary head 2
It is possible to position the part feeder 5 for supplying the necessary types of parts P to the parts supply station S1.

S2 is provided below the rotary head 2 and obtains a horizontal projection image of the nozzle 3 by an observing means B which will be described in detail later, and at the same time shifts ΔX, ΔY of the position of the component P sucked by the nozzle 3 and the like. Is the first recognition station for measuring S3 is a second recognition station that acquires the height information of the lower end portion of the nozzle 3 by the nozzle height detection unit C described in detail later. Further, 11 and 12 are provided in the front part of the base 1 and are board carry-in conveyors for carrying in the board 20 in the direction of arrow N1, and 13 and 14 are boards for carrying out the board 20 in which the component P has been mounted in the direction of arrow N2. It is a carry-out conveyor. Further, 15 is provided on the base 1 and is an X motor 1
6 is an X table driven by 6, and 17 is a Y table driven by a Y motor 18. On the Y table 17,
A substrate holder 19 that holds the substrate 20 is provided.
S4 is a component mounting station in which the nozzle 3 mounts the component P on the substrate 20 positioned by the X table 15 and the Y table 17, and S5 is a nozzle selection station provided with a nozzle selection unit 21 for selecting the nozzle 3 to be used next time. Is. When the rotary head 2 is index-rotated in the direction of arrow M, the transfer head 4 sequentially circulates through the component supply station S1, the recognition station S2, the component mounting station S3, and the nozzle selection station S4.

FIG. 2 is a side view of the observation means in one embodiment of the present invention. In FIG. 2, reference numeral 30 denotes a box-shaped case that blocks light except for an opening 30a opened on the upper surface, 31 denotes a camera housed in the case 30 so that the optical axis is lateral, and 32 denotes a camera 31. The optical axis is bent 90 degrees and the opening 30
It is a mirror which is directed to the nozzle 3 of the transfer head 4 through a. 6 (a) to 6 (d) are explanatory views showing examples of images of the camera in one embodiment of the present invention. In FIG. 6, V indicates the field of view of the camera 31. 6A is an image of a large nozzle 3A for adsorbing a large electronic component, FIG. 6B is an image of a 1005 nozzle 3B for adsorbing a very small 1005 chip, and FIG. 6C. 6D is an image of a 1608 nozzle 3C for adsorbing a medium-sized 1608 chip, and FIG. 6D is an image of a melph nozzle 3D for adsorbing a medium-sized melph chip. As is clear from FIGS. 6A to 6D, based on the image of the camera 31, a large large nozzle 3A and a small nozzle 10A.
It is relatively easy to identify the 05 nozzle 3B, the medium 1608 nozzle 3C, or the melph nozzle 3D. However, it is very difficult to distinguish the 1608 nozzle 3C and the melph nozzle 3D only by the image of the camera 31.

FIG. 3 is a side view of the nozzle height detecting portion in one embodiment of the present invention. Of the nozzle height detector C,
Reference numeral 40 denotes a box having a recess 40a in the vicinity of the orbit of the transfer head 4, through which the nozzle 3 protruding downward from the transfer head 4 can pass. Further, 41 is a laser irradiator which is provided on one wall surface of the recess 40a and irradiates a vertically long slit light, and 42 is a laser irradiator 4
1 is a laser light receiver provided on the other wall surface facing 1. That is, by irradiating the slit light from the laser irradiator 41 and passing the nozzle 3 between the laser irradiator 41 and the laser light receiver 42, the height H of the lower end of the nozzle 3 can be measured. 7 (a) and 7 (b) are side views of the nozzle in one embodiment of the present invention, in which 1608 nozzle 3C (FIG. 7 (a)) and melph nozzle 3D (FIG. 7 (b)) are shown.
Is shown. Here, at least 160
In the eight nozzles 3C and the melph nozzles 3D, the heights of the lower ends of the nozzles are made different by, for example, changing the length of the nozzle itself or shifting the vertical mounting position on the transfer head 4. Therefore, the nozzle height detector C has different heights for the 1608 nozzle 3C and the melph nozzle 3D (height H1 for the 1608 nozzle 3C,
The height H2) is detected by the melph nozzle 3D, and the 1608 nozzle 3C and the melph nozzle 3D, which are difficult to identify, are thus identified.

FIG. 4 is a block diagram of an electronic component mounting apparatus according to an embodiment of the present invention. Reference numeral 51 is a recognition unit for recognizing an image obtained by the camera 31, and 52 is an image obtained by the camera 31 and nozzle height detection. A temporary storage unit that temporarily stores data such as the height of the lower end of the nozzle 3 measured by the unit C, and a determination unit 53 that determines the type of the nozzle of interest according to the flowchart of FIG.

FIG. 5 is a flow chart for nozzle type determination of the electronic component mounting apparatus according to an embodiment of the present invention. Here, the process of FIG. 5 is performed after the nozzle 3 is mounted on the transfer head 4 at the start of operation of the electronic component mounting apparatus according to the embodiment of the present invention and before the electronic component mounting operation. And
By this processing, the mounting mistake of the nozzle 3 is checked, and if there is a mounting mistake, the operator corrects the nozzle.

Now, in step 1, the judgment part 53 checks the image data in the temporary storage part 52, and as shown in FIG.
As shown in (b), it is determined that the image having a small diameter is 1005 nozzles (step 3). However, for medium-sized images, 16
Either the 08 nozzle or the Melfu nozzle is reserved (step 4), and the height data of the lower end portion of the nozzle of interest detected by the nozzle height detection unit C is checked (step 5). Then, if the height H1 of the 1608 nozzle shown in FIG. 7A substantially matches, it is determined to be the 1608 nozzle (step 6), and if it matches the height H2 of the melph nozzle, it is determined to be the melph nozzle (step 7).

[0014]

According to the electronic component mounting apparatus of the present invention, a camera for obtaining a horizontally projected image of a nozzle, a nozzle height detection unit for detecting the height of the lower end portion of the nozzle, an image of the camera and a nozzle height detection unit. Since the determination unit that determines the type of nozzle by integrating the height of the unit is provided, it is possible to know the mounting error of the nozzle prior to the mounting operation, and it is possible to suppress defects in the mounting operation.

[Brief description of drawings]

FIG. 1 is a plan view of an electronic component mounting apparatus according to an embodiment of the present invention.

FIG. 2 is a side view of the observation means according to the embodiment of the present invention.

FIG. 3 is a side view of a nozzle height detection unit according to an embodiment of the present invention.

FIG. 4 is a block diagram of an electronic component mounting apparatus according to an embodiment of the present invention.

FIG. 5 is a flowchart of nozzle type determination of the electronic component mounting apparatus according to the embodiment of the present invention.

FIG. 6A is an explanatory diagram showing an image example of a camera in one embodiment of the present invention. FIG. 6B is an explanatory diagram showing an image example of a camera in one embodiment of the present invention. Explanatory drawing which shows the image example of a camera (d) Explanatory drawing which shows the image example of the camera in one Example of this invention.

FIG. 7A is a side view of a nozzle according to an embodiment of the present invention. FIG. 7B is a side view of a nozzle according to an embodiment of the present invention.

[Explanation of symbols]

 3 Nozzle 4 Transfer Head 15 X Table 17 Y Table 20 Substrate 31 Camera 53 Judgment Section A Component Supply Section C Nozzle Height Detection Section

Claims (1)

[Claims] 1. A component supply section for supplying a component, a table for positioning a substrate, a transfer head having a plurality of nozzles according to the type of the component, and a camera for acquiring a horizontal projection image of the nozzle. A nozzle height detecting unit that detects the height of the lower end of the nozzle, and a determining unit that determines the type of nozzle by combining the image of the camera and the height of the nozzle height detecting unit. A characteristic electronic component mounting device.