JPH09139597A - Component mounting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To recognize the external shape of a component by a method wherein a component mounting machine is provided with a recognition means, which recognizes the transmitted image or the reflected optical image of the component attracted to an attracting nozzle and is provided with a filter which transmits light of a certain wavelength, illuminating means, which irradiate lights of wavelengths different from each other, and a member, which reflects illuminating light of a certain wavelength and absorbs illuminating light of a certain wavelength. SOLUTION: A component mounting machine is provided with a small-diameter reflective member 7, which reflects illuminating light A of a certain wavelength and absorbs illuminating light of a certain wavelength B. As an attracting nozzle 5, an attracting nozzle 5a for small- sized component use is selected and in the case where a small-sized electronic component 9a is attracted to the nozzle 5a, the illuminating light A is irradiated on the component 9a from first illuminating means 10. Reflected light reflected by the member 7, which reflects the light A, is recognized by a recognition means 6 as a silhouette image, which is the transmitted light of the component 9a, and the external shape of the component 9a can be recognized. By transmitting the light A through a filter 12, which transmits the light A only, before the external shape is inputted in the means 6, lights other than the light A are cut and a high-accuracy recognition of the external shape of the component 9a is made.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component mounting machine having a component mounting head capable of selectively attaching and detaching a plurality of types of suction nozzles, and more particularly to a component mounting system having means for recognizing a component suctioned by a suction nozzle. It is about machines.

[0002]

2. Description of the Related Art Conventionally, in an electronic component mounting machine for mounting electronic components of various sizes on a printed circuit board, a component mounting head is provided with a plurality of types of suction nozzles which can be attached or detached or which can be selectively switched. The component recognizing means 6 for recognizing the electronic component 9 and the component illuminating means 13 for illuminating the electronic component 9 as shown in FIGS. It is provided.

Further, in the case of recognizing the external shape of the component shown in FIG. 5, a reflecting member 14 for reflecting the illumination light from the component illuminating means 13 toward the electronic component 9 is provided in the suction nozzle 5, and the reflecting member is provided. Light reflected by 14 is emitted from above the electronic component 9, a silhouette image that is a transmitted light image of the electronic component 9 is recognized by the recognition means 6, and the outer shape of the electronic component 9 is recognized. Next, when there is a lead on the lower side of the electronic component 9 shown in FIG. 6 or when the suction nozzle 5 is larger than the outer shape of the electronic component 9, the suction nozzle 5 is opened and closed so as to sandwich it from both sides above the recognition means 6. The shutter member 15 is provided so as to be capable of closing the reflection member 14 in the closed state, and absorbs the illumination light emitted from the side portion of the recognition unit 6 toward the suction component 9, and the shutter member 15 is closed. The position of the lead of the electronic component 9 is recognized by illuminating the lower surface of the electronic component from the illuminating means 13 in this state and recognizing the reflected light image of the lower surface of the electronic component by the recognizing means 6.

[0004]

However, in the above-mentioned conventional example, when there is a lead on the lower side of the electronic component 9 or when the suction nozzle is larger than the outer shape of the electronic component 9,
A shutter member that absorbs illumination light other than the illumination light that illuminates the lower surface of the electronic component 9 is required, and the shutter member 15 needs to be opened and closed in accordance with the operation timing of the suction nozzle due to the operation of the head.

However, there is a mechanical limit to the opening / closing speed of the shutter member 15, and due to this limit, the conventional recognition method for recognizing the reflected light image of the electronic component 9 cannot increase the component mounting speed. There was a point. Also, due to a malfunction, the suction nozzle 5 and the shutter member 15 interfere with each other,
There is a problem that the suction nozzle 5 is destroyed. In view of the above conventional problems, the present invention can arbitrarily switch the component recognition by the transmitted light image and the reflected light image without the shutter member 15.
An object of the present invention is to provide a component mounting machine in which the component mounting speed is increased by removing the mechanical limit of the speedup by the shutter member 15.

[0006]

In order to solve the above-mentioned problems, the present invention solves the above-mentioned problems by mounting a component mounting head capable of selectively switching a plurality of types of suction nozzles, and a transmitted light image or reflection of the components suctioned by the suction nozzles. Recognition means for recognizing an optical image, which transmits only light of a certain wavelength, and which is provided with a filter which can be arbitrarily switched, and illumination means which is provided on the side of the recognition means and emits light of several kinds of different wavelengths. , Which is provided on an appropriate suction nozzle, reflects the illumination light A of a certain wavelength emitted from the side of the recognition means toward the adsorption component and the recognition means, and absorbs the illumination light B of a certain wavelength. The component mounting machine is provided with a member for performing.

Therefore, according to the present invention, when recognizing the outer shape of a component, a suction nozzle provided with a reflecting member that reflects light A and absorbs light B is used. The illuminating light A is applied to the reflecting member, and recognition is performed by a recognizing unit equipped with an optical filter that allows only the light A to pass the transmitted light image of the component. If there is a lead on the lower side of the component or if the suction nozzle is larger than the outer shape of the component, use a suction nozzle provided with a reflection member that reflects the light A and absorbs the light B. After irradiating the reflecting member with the light B and passing the reflected light image of the component lead through an optical filter that allows only the light B to pass through, the recognition unit recognizes the light. In this way, even when recognizing the reflected light image of the component, a certain light A
The shutter mechanism can be eliminated by using a member that reflects light and absorbs a certain light B, so that mechanical troubles can be reduced.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the component mounting machine of the present invention will be described below with reference to FIGS. As shown in FIG. 4, the component mounting machine of this embodiment includes a component supply unit 1 for supplying various electronic components to be mounted on the printed circuit board 2 and an XY table 3 on which the printed circuit board 2 is mounted. Twelve component mounting heads 4 arranged in an annular shape are arranged between them, and these component mounting heads 4 are installed at twelve stations S1.
It is configured to move clockwise with respect to S12.

The mounting head 4 for each component is provided with five nozzle mounting portions, and by rotating the component mounting head 4 around the vertical axis, the suction nozzle 5 can be switched and used. These suction nozzles 5 are roughly classified, as shown in (a) and (b) of FIG. 1, to reflect the illumination light A having a certain wavelength toward the suction component and the recognizing means, and to generate a certain wavelength. A suction nozzle 5a for a small component equipped with a small-diameter reflecting member 7 that absorbs the illumination light B, and an illumination light A of a certain wavelength that is reflected toward the adsorption component and the recognition means and has a certain wavelength. The suction nozzle 5b for a large-sized component is provided with a large-diameter reflecting member 8 that absorbs the illumination light B.

Here, infrared light (wavelength 800 to 1000 nm) is used as the illumination light A having a certain wavelength, and visible light (wavelength 500 to 700 nm) is used as the illumination light B having another wavelength. Further, as the member that reflects the illumination light A and transmits the illumination light B, a member that reflects infrared light and absorbs visible light may be used.
Here, a member having a filter that absorbs visible light and transmits infrared light is used on the surface of a reflecting plate that reflects both visible light and infrared light. The infrared light emitted from the light source passes through the filter, is reflected by the reflection plate, passes through the filter again, and is emitted to the component. In addition, visible light is absorbed by the filter. This makes it possible to realize a member that reflects the illumination light A and absorbs the illumination light B. A characteristic diagram of this filter and the illumination lights A and B is shown in FIG.

Next, each station S _{1 of the} mounting head 4
The operation in S ₁₂ will be described. The first station S1 is a component take-out station, and the suction nozzle 5 of each component mounting head 4 picks up a predetermined electronic component 9 from the component supply section 1 and takes it out. The second station S2 is an empty station. The third station S3 is an attitude adjusting station that rotates the suction nozzle 5 about its axis to adjust the mounting attitude of the component.

The fourth station S4 is a component recognition station, which is provided with a recognition means 6 for recognizing the shape and the suction posture of the electronic component 9 sucked by the suction nozzle 5. The component recognition station S4 irradiates the members 7 and 8 that reflect the illumination light A toward the suction component and the recognition means and absorb the illumination light B toward the members 7 and 8. Then, the first illuminating means 10 for irradiating the reflected light from above the electronic component 9 with light A, and the second illuminating with the light B for irradiating the lower surface of the electronic component with light B.
Illuminating means 11 is provided. Further, the image input section of the recognition means 6 is provided with a filter member that transmits only the lights A and B, respectively.

At the fifth station S5, the rotational attitude of the electronic component 9 is corrected. The sixth station S6 is an empty station. At the seventh station S7, the electronic component 9 is mounted on the printed board 2. The eighth station S8 is a nozzle returning station for returning the used suction nozzle 5 to the upper side. The ninth station S9 is a station for discharging the electronic component 9 that has not been mounted because it is a defective product. The tenth station S10 is a nozzle switching station, and switching of the suction nozzles 5 (5a, 5b) used according to the size of the electronic component 9 to be mounted next is performed for each component mounting head. The eleventh station S11 is a nozzle starting station that outputs the suction nozzle switched in the tenth station to the lower side. The twelfth station S12 is the third station S3
It is a nozzle origin returning station for returning the suction nozzle 5 whose rotation has been adjusted in step 1 to the original rotation position.

Next, the component recognition operation in the component recognition station S4 will be described. As shown in FIG. 1A, when the suction nozzle 5a for small components is selected as the suction nozzle 5 and the small electronic component 9a is sucked, the illumination light A is emitted from the first illuminating means 10. The small-diameter reflecting member 7 that irradiates the light A and reflects the light A recognizes the reflected light as a silhouette image that is a transmitted light image of the electronic component 9a.
And the outer shape of the electronic component is recognized. It is to be noted that, by transmitting the light A through the filter 12 that transmits only the light A before the light is input to the recognition means, light other than the light A is cut and highly accurate recognition is performed.

Further, a suction nozzle 5b for a large component as shown in FIG. 1 (b) is selected, and a large electronic component 9b with leads protruding outward as shown in FIG. 3 (a) is selected. Also in this case, as in the case of FIG. 1A, the transmitted light image of the reflected light passes through the filter 12, is recognized by the recognition means 6, and the outer shape of the electronic component 9b is recognized. FIG.
When the suction nozzle 5b for a large component as shown in (b) is selected and the electronic component 9c having leads on the lower surface side as shown in FIG. 3 (b) is sucked, the second illuminating means. The light B is applied to the lower surface of the electronic component 9c from 11 and passes through the filter 12 that transmits only the light B of the reflected light image of the lower surface of the electronic component 9c. Is recognized. Since the large-diameter reflecting member 8 that reflects the light A absorbs the light B, the recognition unit 6 recognizes only the reflected light from the lower surface of the electronic component 9c. Similarly, in the case of the electronic component 9 having a diameter smaller than that of the suction nozzle 5, the outer shape of the electronic component is recognized from the reflected light image.

As described above, according to this embodiment, it is possible to select the component recognition by the transmitted light image or the reflected light image according to the electronic component 9 sucked by the suction nozzle 5, and the outer shape of the electronic component 9 can be selected. When it is sufficient to recognize it, and when it is necessary to recognize the lead on the lower surface side of the electronic component 9, it is possible to appropriately and accurately recognize it. Further, even when performing reflection recognition, by using a member that reflects the light A and absorbs the light B, it is possible to eliminate the shutter member that has been conventionally used, which may cause mechanical trouble. Can be reduced.

[0017]

According to the component mounting machine of the present invention, when recognizing the outer shape of a component, the transmitted light image of the component is recognized by the recognizing means by using the light A and a member that reflects the light A. By recognizing, the outer shape can be recognized, and when recognizing the lead on the lower surface side of the component, the reflected light image of the component is recognized by the recognizing means using the light B and a member that absorbs the light B. It can be recognized by doing. Further, in the case of recognizing a reflected light image of a component, in the past, a shutter member that shields the reflected light by the reflecting member was required, but the shutter member can be eliminated by using a member that reflects only specific light. It is possible to reduce mechanical troubles. Further, also in the component mounting tact, the mechanical restriction by the shutter member is eliminated, so that the speed can be increased.

[Brief description of the drawings]

1A and 1B show a component recognition state according to an embodiment of the present invention, in which FIG. 1A is a front view showing a transmitted light image of the component outline, and FIG.
FIG. 6 is a front view showing a recognition state of a lower surface of a component by a reflected light image.

FIG. 2 is a characteristic diagram of an optical filter provided on the surface of a reflector. A region having a wavelength longer than 800 nm is a transmission region, and a region having a shorter wavelength is an absorption region.

3A and 3B show examples of electronic components to be recognized, wherein FIG. 3A is a front view of an electronic component for performing outer shape recognition, and FIG. 3B is a front view of an electronic component for performing lead recognition on a lower surface.

FIG. 4 is a plan view showing the overall schematic configuration of the component mounting machine.

FIG. 5 is a front view in the case of recognizing the outer shapes of components in a conventional example.

FIG. 6 is a front view when recognizing a lead position of a component in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Component supply part 2 Printed circuit board 3 XY table 4 Component mounting head 5 Adsorption nozzle 6 Recognition means 7 Small diameter reflection member 8 Large diameter reflection member 9 Electronic component 10 1st illumination means 11 2nd illumination means 12 Filter

Claims (2)

[Claims] 1. A component mounting head capable of selectively attaching and detaching a plurality of types of suction nozzles, a recognition unit for recognizing a transmitted light image or a reflected light image of a component suctioned by the suction nozzle, and a side portion of the recognition unit. The illuminating means provided for irradiating different kinds of light having different wavelengths and the illuminating light A having a certain wavelength radiated from the side of the recognizing means provided on the suction nozzle are provided to the suction part and the recognizing means. A component mounting machine comprising a member that reflects toward and absorbs illumination light B having another wavelength. 2. The component mounting machine according to claim 1, further comprising a filter which can be arbitrarily switched and which allows only an arbitrary wavelength to pass in front of the input portion of the recognition means.