JPH05280902A - Nozzle inspection device - Google Patents

Abstract

PURPOSE:To obtain a nozzle inspection device which can accurately measure the relative position between a suction nozzle and a parts supply position on a parts cassette using a simple method and can suck the parts positively with the suction nozzle. CONSTITUTION:A fiber scope 3 is mounted at a fitting position of a suction nozzle 18 on a rotary table 17 and the image of a part 19 which are located at the parts supply position of a parts cassette is picked up by a camera 1 through the fiber scope 3. Then, the imacge of the parts which is picked up is displayed on the screen of a monitor television 5 for measuring the position of the part 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a relative position between a component supply position on a parts cassette, which is a component supply means provided on a component mounting machine for a printed circuit board, and a suction nozzle provided on the component mounting machine. The present invention relates to a nozzle inspection device that measures position accuracy.

[0002]

2. Description of the Related Art A component mounter for mounting components on a printed circuit board includes a parts cassette having tapes on which components are mounted at regular intervals, and a plurality of suction nozzles concentrically mounted on a rotary table. It is provided. Then, the tape is conveyed through the sprocket at a constant pitch, the component on the tape is positioned immediately below the suction nozzle, the suction nozzle sucks the component, and the rotary table rotates to supply the component to a predetermined position on the substrate. It is like this.

[0003]

However, due to manufacturing errors, the parts cassette has play in parts, variations in tape transport, play in sprockets, variations in supply speed, and so on. May cause an error with respect to. In addition, an error may occur in the mounting position of the suction nozzle with respect to the rotary table. As a result, there is a problem in that a component suction error occurs due to the suction nozzle.

As a conventional method for inspecting the relative position of the suction nozzle and the parts on the parts cassette, as shown in FIG. There is a method of using the jig 100 in which the hole 100a is formed. That is, the jig 100 is connected to the pin 100
It is set at a predetermined position on a parts cassette (not shown) via b and 100c, and the suction nozzle is pushed down at this position by hand, and when the nozzle tip smoothly enters the hole 100a, correct positioning is performed. to decide.

However, this method has the drawback that it takes time and labor to perform the position inspection for a large number of suction nozzles, and the measurement accuracy is poor. For this reason, inspection is not performed for all suction nozzles. For example, one suction head equipped with a plurality of suction nozzles is
Only the suction nozzle of the book was inspected, and the assembly accuracy of other suction nozzles was only checked.

The present invention has been made in view of such a situation, and the relative position between the suction nozzle and the component supply position on the component supply means can be accurately measured by a simple method, and the component is suctioned. It is an object of the present invention to provide a nozzle inspection device that can surely adsorb by a nozzle.

[0007]

A nozzle inspection apparatus of the present invention includes a suction nozzle for sucking a component from a component supply means provided in a component mounting machine and conveying it to a predetermined position of the component mounting machine, and a component supply. A nozzle inspecting device for inspecting a relative position of a component on a device, the image capturing device capturing an image of the other side from one of the nozzle side and the component side, and displaying the captured image. A display means is provided.

[0008]

In the nozzle inspecting apparatus having the above construction, the image of the other side is directly picked up by the image pickup means from either the nozzle side or the component side and displayed on the display means. The relative position with can be measured easily and accurately.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a nozzle inspection device of the present invention will be described below with reference to the drawings.

1 and 2 show the configuration of the first embodiment of the present invention. In FIG. 1, a fiberscope 3 is connected via a fiber 2 to a camera 1 which is an image pickup means having a CCD image pickup element built therein. The camera 1 is also connected via a signal cable 4 to a monitor television 5, which is a display means. FIG. 2 shows a schematic configuration of the camera 1 and the fiberscope 3. An endoscope 7 is attached to the camera 1 via an adapter 6 on the same optical axis. One end of the optical fiber 2 is connected to the base end of the fiberscope 3 via a fiber chuck 8, and the other end of the optical fiber 2 is connected to the endoscope 7. A focus ring 9 for focusing the camera 1 is provided near the base end of the fiberscope 3, and a moving rod 10 is attached to the focus ring 9. A head holder 11 is attached to the tip of the fiberscope 3,
The head holder 11 is provided with a fiber head adjusting screw 12. Further, the fiberscope 3 is supported by the set block 13 so as to be movable in the axial direction.

The master jig 14 is formed in a U shape, and the fiberscope 3 is set on the upper side of the set block 13.
The mounting hole 14a is formed so that the lower end thereof penetrates when it is mounted via the. Further, a light emitting portion 15 is provided concentrically with the mounting hole 14a on the lower side, and the side surface of the lower side emits light by light sent from a light source (not shown) via an optical fiber 16 mounted. ..

Next, a method of inspecting a nozzle using the apparatus shown in this embodiment will be described. First, the fiberscope 3 is inserted into the mounting hole 14a, and the set block 13
It is attached on the master jig 14 via. Then, the lower end of the fiberscope 3 illuminated by the light emitting unit 15 is imaged by the camera 1 via the optical fiber 2 and displayed on the screen of the monitor television 5. This confirms where the center of the fiberscope 3 is on the screen. At this time, for example, a reticle 16 having a scale of 50 μm is provided in the optical system in the horizontal and vertical directions so that the reticle 16 is displayed on the television screen.

Next, one of a plurality of suction nozzles 18 concentrically mounted on the rotary table 17 of the mounting machine body.
The book is removed, and the fiberscope 3 is attached at that position. Then, the fiberscope 3 is focused on the part 19 delivered by a parts cassette (not shown) attached to the mounting machine. This focusing is performed by moving the fiberscope 3 in the axial direction with respect to the set block 13 and rotating the focus ring 9. As a result, it is possible to confirm whether or not the image of the component 19 captured by the camera 1 is displayed on the screen of the monitor television 5 and is at the center of the image of the tip of the fiberscope 3 corresponding to the nozzle. Then, the reticle 16 can measure the deviation amount.

Further, when performing the above-mentioned measurement, the parts cassette is driven to send out the parts storage tape, and the positions of the parts on the tape are confirmed, so that variations in the sprocket for driving the tape can be confirmed.

According to this embodiment, since the position of the component directly below the suction nozzle mounted on the rotary table can be directly seen, the component feeding error due to the component cassette can be accurately measured. As a result, the parts cassette or the like can be adjusted to supply the parts with high accuracy, and the suction amount of the suction nozzle can be eliminated to improve the production amount and the quality.

A second embodiment of the present invention is shown in FIGS. In these figures, the portions corresponding to those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted as appropriate. In the first embodiment, the position accuracy of the component 19 on the parts cassette is measured with the suction nozzle 18 as a reference, but in the second embodiment, the position accuracy of the suction nozzle is measured with the theoretical component position of the parts cassette as a reference. It is a thing.

As in the case of the first embodiment, the camera 1 and the monitor television 5 are connected by the cable 2, and the power source section 20 is provided in the middle of the cable 2. Power supply 20
Is connected to an AC 100V power source. One end of the optical cable 2 is connected to the light receiving side of the camera 1 via the adapter 6, and the detection unit 21 is connected to the other end of the optical cable 2. The detection unit 21 includes a support member 22 and a support member 22.
It is composed of an endoscope 7 provided on the upper side so as to be able to move forward and backward via a guide member 23, and a prism 24 provided so as to face the endoscope 7. Further, the endoscope 7 is advanced and retracted on the guide member 23 by the coarse adjustment knob 25 and the fine adjustment knob 26,
The focus of the image reflected and incident by the prism 24 is adjusted. A hook 27 is attached to the support member 22.

On the other hand, a rotary table 1 is mounted on the mounting machine body.
7, a plurality of (only one is shown in the drawing) suction nozzles 18 are concentrically attached to the rotary table 17 via a housing 28 as shown in FIG. Further, the parts cassette 2 is provided directly below the suction nozzle 18.
9 is positioned and installed, and the parts cassette 2
The detection unit 21 is attached to the lower surface of 9. Here, an opening 30 is formed at the theoretical component supply position of the parts cassette 29, and the prism 24 and the opening 3 are formed.
0 and the suction nozzle 18 are positioned so as to be aligned.

The tip of a light guide 31 shown in FIG. 5 is arranged at the lower end of the suction nozzle 18, and the light guide 31 is supported by a magnet stand 32. Further, the base end of the light guide 31 is connected to a light source 33 that lights up at 100 V AC, and the lower end of the suction nozzle 18 is illuminated via the light guide 31.

Next, a nozzle inspection method performed by using the apparatus shown in this embodiment will be described. The image of the tip of the suction nozzle 18 illuminated by the light emitted from the light guide 31 passes through the opening 30 of the parts cassette 29, is reflected by the prism 24, and enters the endoscope 7. This image is magnified by the endoscope 7 and enters the camera 1 via the optical cable 2,
It is converted into an electric signal by the camera 1. This electric signal is input to the monitor television 5, and the image of the tip of the suction nozzle 18 is superimposed on the reticle 16 and projected on the television screen. As a result, the positional accuracy of the suction nozzle 18 can be read. The notch 34 displayed on the screen shows the methodality of the suction nozzle to be inspected when viewed from the mechanical plane.

According to the experiment, the mounting machine provided with eight suction nozzles was continuously operated to measure the nozzle position accuracy, and as a result, as shown by the dotted line in FIG. Something was confirmed. In addition, by sequentially replacing the detection unit 21 with the suction nozzle 18 and performing measurement,
All of the suction nozzles 18 provided in the mounting machine can be inspected.

According to this embodiment, the suction nozzle 1 is mounted on the mounting machine.
It is possible to accurately and easily measure the positional accuracy of the suction nozzle 18 in an actually used state with the 8 and the parts cassette 29 attached.

[0023]

As described above, according to the nozzle inspection apparatus of the present invention, the one side of the nozzle side or the component side is imaged and displayed on the other side.
It is possible to easily and accurately measure the relative positions of the two, prevent the occurrence of component suction errors, and improve the production volume and quality.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration of a first embodiment of a nozzle inspection device of the present invention.

FIG. 2 is a side view showing a configuration of a camera and a fiberscope shown in FIG.

FIG. 3 is an explanatory diagram showing a configuration of a second embodiment of the nozzle inspection device of the present invention.

FIG. 4 is a perspective view of essential parts showing a mounting state of a suction nozzle in a mounting machine.

FIG. 5 is an explanatory diagram showing a configuration of an illumination system according to a second embodiment of the present invention.

6 is a front view showing an example of a screen of the monitor television shown in FIG.

FIG. 7 is a perspective view showing a configuration of an example of a jig used in a conventional nozzle inspection.

[Explanation of symbols]

 1 camera (imaging means) 5 monitor TV (display means) 18 suction nozzle 19 parts 29 parts cassette (parts supply means)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Teruyasu Sakurai, Inoue 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Inventor, Tadao Yamada 3-9-9 Inoda, Amagasaki-shi, Hyogo Taiyo Inside Densan Co., Ltd.

Claims (1)

[Claims] 1. A relative position between a suction nozzle that sucks a component from a component supply unit provided in the component mounter and conveys the component to a predetermined position of the component mounter, and a component on the component supply unit. A nozzle inspecting apparatus for providing an image pickup means for picking up an image of the other side from either the nozzle side or the component side, and a display means for displaying the picked-up image. Characteristic nozzle inspection device.