JPS6295409A - External appearance inspecting instrument - Google Patents

Abstract

PURPOSE:To inspect simply an external appearance from the desired direction with a set of image pickup means by turning a body to be inspected on a turntable. CONSTITUTION:An electronic parts 21 such as an IC conveyed from the direction shown with the arrow 31 in figure by a conveying guide 23 is stopped on the turntable 33 provided on the way of the conveying guide 23 and can be freely turned. An ITV camera 35 which is the image pickup means is provided in the opposition to the turntable 33 at a place where the turntable 33 is provided and the external appearance of the turning electronic parts 21 on the turntable 33 can be picked up on image.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an appearance inspection apparatus for inspecting the appearance of electronic components, such as ICs, that are conveyed by a conveyance guide.

[Technical Background of the Invention and Problems Therewith] Electronic components such as ICs that are sequentially transported from a production line by a transport guide are conventionally transported by ITV cameras 25. 27 or the like, and this improved appearance information is compared with a normal one using, for example, a Conbuque hat, and the appearance is inspected.

By the way, in such conventional visual inspection of electronic components, since ITV cameras are required on both sides of the transport guide 23, the images are high and the transport guide 23 is
It is possible to inspect only the appearance of both sides of the electronic component 21 along
There is a problem in that the appearance of the nine surfaces cannot be inspected.

[Object of the Invention] This invention has been made in view of the above, and its purpose is to provide an appearance inspection device that can economically and easily inspect the entire appearance of an object to be inspected. be.

[Summary of the Invention] In order to achieve the above object, the present invention provides an appearance inspection apparatus for inspecting the appearance of an object to be inspected being transported by a transport guide, and as shown in FIG. a turntable 1 provided at
a rotary drive means 5 for rotating the rotary table 1 so that the external appearance of the object to be inspected that has been conveyed upward is conveyed from a desired direction by the image means 3; The gist of the present invention is to include a determining means 7 for determining whether the appearance of the object to be inspected is good or bad based on the appearance information of the object to be inspected.

[Embodiments of the invention] Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 2 shows an embodiment of the present invention. In this embodiment, an electronic component 21 such as an IC, which is transported from the direction indicated by an arrow 31 by a transport guide 23, is installed in the middle of the transport guide 23. It is designed to stop on a rotary table 33 which is mounted on a rotary table 33 and freely rotate 1q. Where this rotary table 33 is installed, the rotary table 3
A TV camera 35, which is an imaging means, is disposed opposite to 1! ? It has become so. In the diagram, electronic component 2
1 shows a case where the conveyance guide 23 is rotated by 90 degrees with respect to the conveyance direction, and the ITV camera 35 images the appearance of the rear thereof. Moreover, in this way, the electronic component 21 is
°Another transport guide 29 is provided in the rotated direction, that is, in a direction perpendicular to the transport direction of the transport guide 23, but the electronic component 21 is determined to be defective as a result of the visual inspection. In this case, this transport guide 29 is used as shown by the arrow 37.
The products are transported in the direction shown by and are distinguished from non-defective products. Electronic components 21 that are found to be non-defective as a result of the visual inspection on the rotary table 33 are further transported along the +m transport guide 23 in the direction indicated by an arrow 39 .

FIG. 3 is a configuration diagram of a control section of the visual inspection apparatus shown in FIG. 2. Appearance information of the electronic component 21 imaged by the ITV camera 35 is converted into a digital signal by the A/D converter 43 via the interface circuit 41, stored in the pattern memory 45, and then converted into an image via the binarization circuit 47. It is processed by four processors. Further, the image processing processor 49 is connected to the mechanism control processor 51,
This mechanism control processor 51 is further connected to a rotary table drive section 53. This rotary table drive section 53
is for controlling the rotation of the surface rotary table 33.

In the visual inspection apparatus configured as described above, the electronic component 21 transported on the rotary table 33 by the transport guide 23 is moved by the rotary table drive unit 53 to a
The ITV camera 35 images the entire external appearance of the electronic component 21 by rotating in sequence, and the imaged external appearance information is processed by four image processing processors to determine whether the external appearance of the electronic component 21 is good or bad. However, its detailed operation will be explained next with reference to the flowchart of FIG.

First, the electronic component 21 that has been conveyed from the direction of the arrow 31 along the conveyance guide 23 is stopped on the rotary table 33, and an image of the external appearance of the first side is conveyed and inputted by the rTV camera 35. (step 110). The input appearance information of the first side is sent to the image processing processor 4.
In step 120, a pass/fail judgment process is performed.
).

If the result of the pass/fail judgment process is that the electronic component 21 is defective, the electronic component 21 is rotated 90' as shown in FIG. (Step 130).

If the result of the visual inspection of the first side surface is that the side surface is normal, then in the next step 140 it is checked whether the visual inspection of the four side surfaces has been completed.

That is, since the electronic component 21 has four sides, first to fourth, it is checked whether inspection of all these sides has been completed. If the inspection of the four side surfaces has not been completed, the rotary table 33 is rotated 90 degrees and both images of the next side surface are captured by the ITV camera 35 and the inspection is carried out.
Steps 150, 160>. Then, in step 120, the image information of the other side inputted in this way is similarly subjected to the quality determination process. Thereafter, all four sides of the electronic component 21 are visually inspected in the same manner.

Note that in the above embodiment, the electronic component 21, especially the IC
Although the case where the external appearance inspection is performed has been described, the present invention is not limited to this. In addition, although the external appearance inspection of the side surface has been explained, by rotating the rotary table 33 not in a plane but in another direction, the outer surface inspection of the upper and lower surfaces, etc.
It can be inspected from Further, a plurality of guides for sending defective products m may be provided in the defective inspection item 1G.

[Effects of the Invention] As explained above, according to the present invention, the object to be inspected is rotated by the rotary drive means on the rotary table, so even one single-layer imaging means can move the object in the desired direction. Since the entire appearance can be easily inspected if necessary, there is no need for multiple ITV cameras as in the past, making it extremely economical. In some cases, the object to be inspected can be transported by a rotary table in the direction that separates it from non-defective items.

[Brief explanation of drawings]

FIG. 1 is a diagram corresponding to the claims of the present invention, FIG. 2 is a perspective view showing a partial configuration of a visual inspection device showing an embodiment of the present invention, and FIG. 3 is a block diagram of the control section of the visual inspection device shown in FIG. 4 is a flowchart showing the operation of the visual inspection device shown in FIG. 1, and FIG. 5 is a block diagram of a conventional visual inspection device. DESCRIPTION OF SYMBOLS 1... Turntable, 3... Imager means, 5... Rotation drive means, 7... Judgment means. Figure 1 Figure 4

Claims (1)

[Claims] An appearance inspection apparatus for inspecting the appearance of an object to be inspected that is transported by a transport guide, the apparatus comprising: a rotary table provided in the middle of the transport guide; and at least one imaging means provided opposite the rotary table. a rotary drive means for rotating the rotary table so that the appearance of the object to be inspected that has been transported onto the rotary table can be imaged from a desired direction by the image pickup means; 1. A visual inspection apparatus comprising: a determining means for determining whether the external appearance of an object to be inspected is good or bad based on external appearance information.