JPH05172513A - Sucked-part recognizing apparatus - Google Patents

Abstract

PURPOSE:To make it possible to execute the recognition of the images of electronic parts having the diversified external sizes from the small parts to the large parts, which are sucked with a sucking nozzle of an electronic-part mounting machine, without changing the arrangement of lighting devices. CONSTITUTION:A TV camera 2 is provided so as to face the edge of a sucking nozzle 5, which is sucking electronic parts. Lighting devices 10A and 10B are arranged at the side parts of the sucking nozzle 5. The central part of the light of each lighting device is emitted on the tip part of the sucking nozzle 5 at the slightly inclined angle on the side of the attaching base part of the sucking nozzle 5 with respect to the plate, which passes through the tip of the sucking nozzle and which is orthogonal to the central axis Z of the sucking nozzle 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction component recognizing apparatus for recognizing an image of the outer shape of a chip component or a surface mounting IC or the like which is suction-held by a suction nozzle.

[0002]

2. Description of the Related Art Conventionally, a reflection mirror is provided behind an adsorption nozzle for adsorbing and holding an electronic component, and light from a light source is directly directed toward the reflection mirror, and the light reflected by the reflection mirror is converted into an electronic component. Japanese Patent Application Laid-Open No. 61-287195 proposes a configuration in which a camera captures an image in which the background of the electronic component is a bright portion and the shape of the electronic component is a dark portion so as to be blocked. Further, Japanese Patent Publication No. 53173/1990 discloses an illuminating means for illuminating a reflection surface of an electronic component sucked by a mounting head so that the illumination light passes through a peripheral portion of the electronic component. Is located on the opposite side of the mounting head with the sucked electronic component in between. Although it is less likely to hinder the movement of the mounting head, it is a wasteful structure for illuminating the reflecting surface.

[0003]

By the way, recently, there is a strong demand for mounting electronic components of various sizes from a small chip component to a large surface mounting IC on a printed circuit board by one electronic component mounting machine. However, in the structure in which the light from the light source is directly applied to the reflecting surface behind the suction nozzle, the following problems occur. (1) If the orientation of the light source is set so as to be suitable for capturing an image of a small chip component, when the suction nozzle sucks a large surface-mounting IC, the large surface-mounting IC's front surface (the surface facing the camera) The light from the light source is also directly applied to the peripheral portion, so that the image capturing of the large-sized component becomes defective. (2) If the orientation of the light source is set so as to be suitable for capturing images of large parts, the amount of reflected light at the periphery of the small chip parts will be insufficient when the suction nozzle adsorbs the small chips, and the image of the small parts will be captured. Becomes defective. (3) In order to avoid the inconveniences of (1) and (2) above, it is necessary to change the arrangement of the light source between a small component and a large component. However, when the arrangement of the light source is changed according to the component size. Has a complicated mechanism. (4) If the illumination light to the reflecting surface is irradiated on the reflecting surface side as much as possible rather than the chip parts adhering to the suction nozzle, the light is prevented from directly hitting the chip parts and the reflecting surface is not wasted. It can shine light and is efficient. For that purpose, the emission of light must be made a suitable structure.

In view of the above points, the present invention executes image recognition of electronic parts of various external dimensions from small parts to large parts that are sucked by the suction nozzle without changing the arrangement of the illuminator. It is an object of the present invention to provide a suction device recognition apparatus that can be used.

[0005]

In order to achieve the above object, the suction component recognition device of the present invention is provided with an image pickup means facing the tip surface of the suction nozzle that has sucked the electronic component, and the suction nozzle An illuminator is arranged laterally, and the center of the light of the illuminator is slightly on the attachment base side of the suction nozzle with respect to a plane that passes through the tip of the suction nozzle and is perpendicular to the central axis of the suction nozzle. It is configured so as to be inclined and emitted to irradiate the tip portion of the suction nozzle.

[0006]

In the suction component recognition device of the present invention, the illuminating device is arranged on the side of the suction nozzle, and the illuminating device is arranged with respect to the plane passing through the tip of the suction nozzle and perpendicular to the central axis of the suction nozzle. The central portion of the light of the illuminator is slightly inclined toward the attachment base side of the suction nozzle and is emitted to irradiate the tip portion of the suction nozzle. Moreover, a part of the light from the illuminator illuminates the reflecting surface behind the suction nozzle. For this reason,
Even for a large component, the light from the illuminator does not strike its front surface, and the amount of reflected light at the periphery of the small component does not become insufficient.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a suction component recognition device according to the present invention will be described below with reference to the drawings.

FIG. 1 shows the overall construction of an embodiment of the present invention.
Shows the configuration of the main part of each example, and FIG. 3 is a front view of the illuminator used in the example. In these figures, reference numeral 1 is a base of an electronic component mounting machine, and a TV camera 2 as an image pickup means is arranged upward on the base. A plurality of (for example, three) suction nozzle holders 4 are provided on the mounting head 3 which is movable by the XY drive mechanism, or a plurality of mounting heads 3 are arranged at equal intervals on the rotation circumference of the rotary table. The mounting head 3 has a plurality of suction nozzle holders 4
In the configuration provided with, each suction nozzle holder 4 has a suction pin 5 in the shape of a hollow pin. However,
In order to deal with various electronic components, for example, the first suction nozzle holder has a thick suction nozzle, the second suction nozzle holder has a middle suction nozzle, and the third suction nozzle holder has a thin suction nozzle. To do. The suction nozzle holders 4 are capable of revolving around the rotation center axis P, and the suction nozzle holders 4 that have reached the position of the center line Z are driven up and down by the mounting head 3 to have the suction nozzle holders 4. The suction nozzle 5 is vacuumed.
The lower surface (suction nozzle mounting surface) of each suction nozzle holder 4 is a main reflection surface (for example, a glossy surface of a metal such as aluminum) forming a bright background of the electronic component suction-held by the suction nozzle 5.
(Including a diffuse reflection surface that scatters light).

In order to make the back of a small chip component (phantom line S in FIG. 2) smaller than the outer diameter of the suction nozzle 5 bright, a semitransparent member such as semitransparent ceramic or semitransparent resin is used as the suction nozzle 5. Should be used.

An auxiliary reflecting plate 7 is supported in order to brighten the back of a large-sized part (phantom line L in FIGS. 1 and 2) whose external dimensions partially protrude from the main reflecting surface 6 of the suction nozzle holder 4. It is fixed to the base 1 side via an arm 8. The lower surface of the auxiliary reflecting plate 7 constitutes a sub-reflecting surface (for example, a glossy surface of a metal such as aluminum, including a diffused reflecting surface that scatters light) 9 located at the outer edge portion of the main reflecting surface 6. ..

On the other hand, illuminators 10A and 10B are arranged on the left and right sides of the suction nozzle 5 at the center line Z position. That is, the illuminators 10A and 10B are fixed to the tip ends of the mounting arms 11A and 11B supported by the fixed bracket 12 on the base 1. The lighting fixtures 10A and 10B are shown in FIG.
And as shown in FIG. 3, a slit-shaped light emission window 13 having two sides a and b parallel to a plane perpendicular to the central axis of the suction nozzle 5.
It is a structure for emitting the light from the optical fiber bundle 14 through the. A light source such as a halogen lamp is arranged at the end of the optical fiber bundle 14. When considering a plane Q passing through the tip of the suction nozzle 5 which is on the center line Z and at a height position at the time of image recognition and is perpendicular to the suction nozzle central axis, the illuminators 10A and 10B are The central portion of the light is directed to the plane Q and the suction nozzle 5 as shown by a ray R.
The mounting arms 11A, 1 supporting the illuminators 10A, 10B so as to emit the light slightly inclined to the mounting base side (that is, the upper side) and irradiate the tip portion of the suction nozzle 5.
Adjust the tilt of 1B and fix it. At this time, the incident angle α of the light ray R with respect to the central axis of the suction nozzle (corresponding to the center line Z) forms an acute angle extremely close to a right angle (for example, the angle α is 90).
The angle is a few degrees less than the degree).

A lower reflecting member 20A as a first reflecting member is fixedly integrated with the lower side of the illuminating device 10A, and a reflecting surface 21A of the lower reflecting member 20A is provided with a light from the illuminating device 10A. The one that is emitted downward is the suction nozzle 5
Is reflected toward the main reflecting surface 6 and the sub-reflecting surface 9 behind.

Further, on the lower side of the illuminator 10B, a first
The lower reflection member 20B as a reflection member is fixedly integrated with the reflection surface 21B of the lower reflection member 20B.
Of the light from 0B, the light emitted downward is reflected toward the main reflection surface 6 behind the suction nozzle 5. further,
An upper reflecting member 22 as a second reflecting member is fixedly integrated on the upper side of the lighting fixture 10B.
The reflecting surface 23 is configured to reflect the light emitted upward from the illuminator 10B toward the reflecting surface 21B. The upper reflecting member 22 includes the suction nozzle 5 and the suction nozzle holder 4 adjacent to the suction nozzle 5 and the suction nozzle holder 4 on the center line Z where the electronic components are suctioned.
In addition to the effect of avoiding the irradiation of light (thing in an idle state), the light directed to the reflecting surface 21B is increased to effectively use the light. Those reflecting surfaces 21A, 2
1B and 23 are composed of a glossy surface or a mirror surface of a metal such as aluminum.

In the configuration of the above embodiment, first, the operation when the large-sized component L is suction-held by the suction nozzle 5 on the center line Z will be described. In this case, the central portion of the light emitted from the illuminators 10A and 10B illuminates the tip portion of the suction nozzle 5, and the downward light of the illuminators 10A and 10B is reflected by the reflecting surfaces 21A and 21B. The main reflecting surface 6 on the suction nozzle holder side and the sub-reflecting surface 9 on the auxiliary reflecting plate 7 side face toward the main reflecting surface 6 and the sub-reflecting surface 9 which are the background of the large component L.
Is a brightened area, and the lower surface (the surface facing the TV camera 2) and the side surface of the large-sized component L are darkened areas where no light is applied. As a result, as shown in FIG. 4, an image in which the outer shape of the large component L is a dark part and the other part is a bright part is displayed on the TV camera 2
The image processing device for processing the video signal of the TV camera 2 can detect the center of the suction nozzle 5 (for example, by the XY drive mechanism of the mounting head 3 which is movable by the XY drive mechanism). Alternatively, it can be mechanically determined in a configuration in which a plurality of mounting heads 3 are arranged at equal intervals on the rotary circumference of the rotary table.) The positional deviation amount ΔX in the X direction of the large component L with respect to
Positional deviation ΔY in Y direction and positional deviation Δθ in rotational direction
Can be recognized.

When the suction nozzle 5 on the center line Z sucks and holds a small component S having a smaller outer diameter than the suction nozzle 5 as shown in FIG. 2, the suction nozzle 5 is made of a semitransparent member. At this time, the central portion of the light emitted from the illuminators 10A and 10B irradiates the tip portion of the suction nozzle 5, and the illuminator 1
Of the light from 0A and 10B, the downward light is reflected by the reflecting surface 21A,
21B, the main reflection surface 6 on the suction nozzle holder side after being reflected by 21B.
And the sub-reflecting surface 9 on the side of the auxiliary reflecting plate 7, so that the tip portion of the suction nozzle 5, which is the background of the small component S, and the main reflecting surface 6
And the sub-reflective surface 9 becomes a bright part, and the small component S
The lower surface (the surface facing the TV camera 2) and the side surface are the dark areas where light is not applied. Therefore, an image in which the outer shape of the small component S is a dark portion and the other is a bright portion is displayed on the TV camera 2
Then, the suction state can be image-recognized as in the case of a large-sized component.

[0016]

As described above, according to the suction component recognition device of the present invention, the suction nozzle can be used without changing the position of the illuminator or the reflector from small chip components to large components such as surface mounting ICs. It is possible to obtain an effect of accurately recognizing the suction state of the electronic component suction-held by.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a suction component recognition device according to the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part of the embodiment.

FIG. 3 is a front view of a lighting device according to an embodiment.

FIG. 4 is an explanatory diagram illustrating an example of a captured image according to the embodiment.

[Explanation of symbols]

 1 Base 2 TV Camera 3 Mounting Head 4 Adsorption Nozzle Holder 5 Adsorption Nozzle 6 Main Reflective Surface 7 Auxiliary Reflector 9 Sub-Reflective Surface 10A, 10B Lighting Equipment 13 Light Emitting Window 14 Optical Fiber Bundle 20A, 20B Lower Reflecting Member 21A, 21B, 23 reflective surface 22 upper reflective member

Claims (6)

[Claims] 1. An imaging device is provided so as to face a tip end surface of a suction nozzle that has sucked an electronic component, and an illuminating device is disposed on a side of the suction nozzle so as to pass through the tip of the suction nozzle and the suction nozzle. The suction part is characterized in that the center part of the light of the illuminator is slightly inclined and emitted toward the mounting base side of the suction nozzle with respect to a plane perpendicular to the central axis to irradiate the tip part of the suction nozzle. Recognition device. 2. The suction component recognition device according to claim 1, wherein the suction nozzle is made of a semitransparent member. 3. The suction component recognition device according to claim 1, further comprising a first reflecting member having a first reflecting surface that directs the light of the illuminator to a reflecting surface behind the suction nozzle. 4. The suction component recognition device according to claim 3, further comprising a second reflecting member having a second reflecting surface that directs the light of the illuminator to the first reflecting surface. 5. A reflection surface behind the suction nozzle is provided on a main reflection surface provided on a member to which the suction nozzle is attached and a sub surface provided on a member different from the member to which the suction nozzle is attached. The suction component recognition device according to claim 3, wherein the suction component recognition device comprises a reflection surface. 6. The suction component recognition according to claim 1, wherein the illuminator emits light from the optical fiber bundle through a light emission window having two sides parallel to a plane perpendicular to the central axis of the suction nozzle. apparatus.