JP2846829B2 - Electronic component holding position detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is held by the holder
Conductive by imaging a projection image of the electronic component relates device for detecting the position relative to the holder of the electronic component, in particular, it relates to facilitating the detection.

[0002]

2. Description of the Related Art Such a position detecting device is already known. As one type, there is a type in which a projection image obtained by reflecting light emitted from a light emitter toward an electronic component by a reflector is captured by an imaging device. In this device, the reflector and the imaging device are provided at positions opposite to each other across the electronic component, and the illuminant is provided on the same side as the imaging device, and emits light toward the reflector. ing. In such an apparatus, the light emitted from the light emitter directly hits the electronic component, and the reflected light is transmitted to the imaging device.
If it is incident, the projected image will be disturbed and the detection accuracy will be reduced. Therefore, a shielding plate is provided so that light emitted from the light emitter does not hit the electronic components.

[0003]

However, if the size of the electronic component changes, it is necessary to replace the shielding plate accordingly. When illuminating the electronic component to obtain a projected image, the shielding plate reflects light from the illuminator directly to the electronic component so that the reflector reflects light from the portion inside the outer edge of the electronic component. It is necessary to prevent the light from illuminating the portion closer to the holder of the reflector as the electronic component becomes smaller, while preventing the light from reaching the reflector. However, in the case of a shielding plate for a large electronic component, the light of the luminous body is only emitted to a position distant from the holder of the reflection plate. The shielding plate cannot sufficiently prevent the light of the luminous body from directly reaching the large electronic component. Therefore, it is necessary to provide shielding plates suitable for the size of the electronic components.However, it is troublesome to replace the shielding plates every time the size of the electronic components changes. This is necessary and increases the equipment cost. Claim
Invention in claim 1 is one that was made as object to provide a detecting device that can reliably detect the holding position regardless of the size of the change of the electronic component. In addition,
The invention of claim 2 provides the electronic component with visible light as uniformly as possible.
Irradiation so that a good projected image of the electronic component can be obtained
This was done as an issue . The invention of claim 3
The light emitting plate as close as possible to the suction surface of the holder.
For better imaging of small electronic components
This was done as an issue. The invention of claim 4
In the case of using the normal body of the imaging device,
Obtaining a clear projected image of electronic components by eliminating the effects of lines
The task was to obtain a detection device capable of detecting
It is.

[0004]

To solve the above SL problems SUMMARY OF THE INVENTION, holding position detection instrumentation of an electronic component according to the invention of claim 1
(A) One side of the electronic component is sucked by the suction surface at the tip
(B) at a position facing the suction surface
Provided, imaging not sensitive to ultraviolet light, but sensitive to visible light
The device and (c) the side opposite to the imaging device with respect to the suction surface
UV light that is provided and emits UV light toward the imaging device
A radiation device, and (d) between the ultraviolet radiation device and the adsorption surface.
Is provided around the entire periphery of the holder,
UV light is absorbed from the surface on the radiator side and from the surface on the adsorption side
And a light-emitting plate that emits visible light. Ma
In the holding position detecting device according to the second aspect of the present invention,
Is a main body in which the light emitting plate is made of a material that diffuses light.
Formed on the surface of the main body on the side of the ultraviolet radiation device.
Absorbs ultraviolet light from the ultraviolet radiation device and allows
A light-emitting layer that emits visible light. Claim
In the holding position detecting device according to the third aspect, the light emission
A plate is fixed to the holder, and the suction surface of the holder is
The suction tube provided extends through the center of the light-emitting plate
It is said. The holding position detecting device according to the invention of claim 4 is provided.
In other words, the image pickup apparatus allows transmission of visible light,
It shall have a filter that does not allow transmission of outside lines.
You.

[0005]

The holding position detecting device according to the first aspect of the present invention
Te is a state where the electronic component is held by the suction surface of the holder,
An ultraviolet light emitting device emits ultraviolet light toward the light emitting plate.
The light-emitting plate absorbs and absorbs ultraviolet light from the surface on the side of the ultraviolet radiation device.
Visible light is emitted from the surface on the landing side. This visible light is the adsorption surface
From behind, the electronic components sucked into the
) To be illuminated, so that the imaging device
A projected image of the article can be obtained. According to the invention of claim 2
In the holding position detection device, light is emitted from the ultraviolet radiation device.
The ultraviolet light emitted to the plate is absorbed by the light emitting layer, and visible light is emitted.
Fired. Visible light is diffused in the body and
The product is irradiated almost uniformly. Holding according to the invention of claim 3
In the position detection device, the light emitting plate is fixed to the holder,
A suction tube that sucks electronic components penetrates the center of the light-emitting plate
The light-emitting plate is attracted because it extends to the imaging device side
Arrange to the position where it touches or is very close to the outer peripheral surface of the pipe
be able to. A holding position detecting device according to claim 4.
In the case, the incidence of ultraviolet light on the imaging device is
Is prevented. Some of the ultraviolet light is other than electronic components and light emitting plates
Of the reflected ultraviolet light
Part is incident on the imaging device and the quality of the projected image of the electronic component is deteriorated.
However, if a filter is provided, these harmful
UV light can be almost eliminated.

[0006]

As is apparent from the above description, the claims
According to the first aspect, light is emitted from the ultraviolet radiation device.
Ultraviolet light incident on the plate is converted to visible light by the light-emitting plate,
Is the electronic component held by the holder by the visible light behind?
Is lit. The light-emitting plate is the electronic component held by the holder
Because it is located between the ultraviolet radiation device, the ultraviolet radiation device
Prevents ultraviolet rays emitted from the
It also plays the role of a shielding plate that stops, and the imaging device is ultraviolet
Because it is insensitive to rays, the projected image
It is hardly affected. Therefore, poor projection image
It is possible to avoid a decrease in detection accuracy of the holding position due to
Easy and accurate positioning of electronic components by the holder
Thus, it is possible to obtain a holding position detecting device capable of detecting the position of the object. Ma
In addition, ultraviolet rays emitted from the ultraviolet radiation device
There be Tatte or is reflected toward the imaging device
However, since the imaging device is not sensitive to ultraviolet light,
Unaffected by those UV rays, no disturbance
A clear projected image can be obtained. In addition, conventionally required
Installation and replacement of shielding plates according to the size of electronic components
No need for replacement, etc., to reduce work steps and equipment costs
Can be. Further, according to the invention of claim 2, the electronic component
Visible light is emitted from behind almost uniformly,
According to the third aspect of the present invention, a clear projected image can be obtained.
Irradiate electronic components from a position very close to the suction tube.
A good projection image can be obtained,
According to the fourth aspect of the invention, there is provided a normal imaging device which is also sensitive to ultraviolet rays.
While using the imaging device, the product of the projected image
Additions such as quality deterioration can be avoided well
Effect can be obtained. In particular, the invention of claim 3
The light-emitting plate in contact with or very close to the outer peripheral surface of the suction tube.
Very small electrons can be placed by touching
Remarkable that a good projection image can be obtained even with parts
The effect is obtained.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram illustrating an electronic component holding device that holds an electronic component for mounting on a printed circuit board. In the figure, reference numeral 8 denotes a frame, on which an XY table 10 which is moved in mutually orthogonal X and Y directions in a horizontal plane is attached. The table 10 is driven by a servomotor or the like, and is positioned at an arbitrary position in a horizontal plane with high accuracy. The table 10 is provided with a linear slide 12 that is moved in a vertical direction by a driving device (not shown), and a holder 14 is fixed to the linear slide 12. The holder 14 includes an arm 16 extending horizontally from a lower end thereof. A cylindrical member 18 is supported by the arm 16 via a sleeve 20 so as to be rotatable around a vertical axis.

The cylindrical member 18 has a stepped shape, and its small-diameter portion 2
6, the sleeve 20 is axially movably fitted to the sleeve 20, and is engaged with an engagement projection 32 provided at an upper end of the sleeve 20 in an engagement hole 30 provided in the large diameter portion 28. , The rotation with respect to the sleeve 20 is prevented. Further, an air passage 34 is formed in the cylindrical member 18 so as to penetrate the center part in the axial direction, and a nut 36 is fixed to an upper end part. A connection fitting 40 of a rubber vacuum hose 38 is screwed into the nut 36.
Thereby, the cylindrical member 18 is connected to a vacuum source (not shown). A compression coil spring 46 is provided between the sleeve 20 and the end of the tubular member 18 projecting from the sleeve 20, so that the large diameter portion 28 of the tubular member 18 abuts on the upper surface of the sleeve 20. Have been allowed.

A large-diameter gear 50 is integrally provided on an upper portion of the sleeve 20 protruding from the arm portion 16 and is meshed with a small-diameter gear 52 rotatably supported by the arm portion 16. A medium-diameter gear 54 is fixed to the small-diameter gear 52, and the medium-diameter gear 54 is meshed with a drive gear 58. The drive gear 58 is rotated by a servomotor 60 attached to the linear slide 12 by a bracket 59. Thus, the large-diameter gear 50 is rotated via the medium-diameter gear 54 and the small-diameter gear 52, and the cylinder member 18 is rotated together with the sleeve 20.

An outer flange 64 is provided at the lower end of the cylindrical member 18 protruding from the sleeve 20, and the light emitting plate 66 is fixed by screws 68. The light emitting plate 66 has a plate shape and includes a main body 70 fixed to the flange portion 64, and a light emitting layer 72 in which a fluorescent paint is applied to an upper surface of the main body 70. In this embodiment,
The body 70 is made of a translucent material that diffuses light.
I have. The light-emitting plate 66 penetrates it in the thickness direction,
An air passage 74 concentric with the air passage 34 formed in the cylindrical member 18 is formed. One end of the air passage 74 is connected to the main body 70.
Open at the center of the surface (lower surface) of the
Connected to a vacuum source. A metal suction tube 78 having excellent wear resistance is press-fitted into a side of the air passage 74 which opens on the surface (lower surface) of the main body 70 . Suction pipe 78 is rather fine than the electronic component 80. The suction tube 78 sucks and releases the electronic component 80 in accordance with switching of an electromagnetic direction switching valve provided in the vacuum source.

The frame 8 includes an image pickup device 84.
Is attached. This imaging device 84 is a lens 86
And a camera 88. When the suction tube 78 is positioned right above the imaging device 84, the suction tube 78
Are provided so as to face the light emitting plate 66 with the electronic component 80 held therebetween. Shooting for electronic components 80
On the opposite side of the image device 84 and above the light emitting plate 66
Is provided with a ring lamp 90 as an ultraviolet radiation device.
The cylindrical member 18 is supported by a bracket (not shown).
Are arranged around. Ring lamp 90 is intended to emit ultraviolet, light-emitting layer 7 2 formed by coating the fluorescent paint which emits visible light as well as absorb the UV. The wavelength of the light emitted to the light emitting plate 66 and the wavelength of the light emitted from the light emitting plate 66 are different from each other. Furthermore, close to the lens 86 to the imaging apparatus 84, full I Le <br/> data 94 is provided is supported by a bracket (not shown) at a position opposite to the electronic component 80. This filter 94, while absorbing ultraviolet light, other
It is intended to permit the transmission of light of a wavelength, an imaging device 84
Only the visible light emitting layer 7 2 radiate becomes possible to light incident on.

The electronic component holding device configured as described above receives the electronic component 80 from the component supply device and mounts it on the printed circuit board. The image pickup device 84 is located between the component receiving position and the mounting position. The electronic component 80 is mounted on a printed circuit board after the holding position error of the electronic component 80 detected by the imaging device 84 is corrected. When the electronic component 80 is received, the linear slide 12 is lowered while the suction tube 78 is positioned on the electronic component 80 to be received in the component supply device, and the suction tube 78 is brought into contact with the upper surface of the electronic component 80. . Although it is slightly lowered even after the contact, the suction tube 78 compresses the compression coil spring 46 and moves with respect to the sleeve 20, thereby avoiding damage to the electronic component 80 and the suction tube 78. In this state, the suction tube 78 is communicated with the vacuum source, and sucks the electronic component 80.

Thereafter, the linear slide 12 is raised, the XY table 10 is moved, and the suction tube 78 is positioned right above the imaging device 84. Then, ultraviolet rays are radiated toward the ring lamp 90 or al onset optical plate 66. As a result, the light emitting layer 72 absorbs ultraviolet light and emits visible light toward the electronic component 80 . This visible light
Is an electronic component that is transmitted through the main body 70 and diffused.
The light is substantially uniformly irradiated on the light, and enters the lens 86 to form a projected image of the electronic component 80 on the solid-state image sensor surface of the image pickup device 84. The ring lamp 90 is an imaging device for the light emitting plate 66.
84, the ring lamp 9
The ultraviolet rays emitted from the light emitting layer 72 and incident on the light emitting layer 72
Is converted to visible light. The light emitting plate 66 is a ring lamp 9
0 prevents ultraviolet rays emitted directly from entering the imaging device.
It also functions as a shielding plate to stop
There is little risk of being affected by lines. However, in peripheral equipment
The applied ultraviolet light was reflected toward the imaging device 84
Or a light emitting plate according to a change in the size of the electronic component 80
The size of the light emitting plate 66 has been reduced by replacing the 66.
The ultraviolet light of the ring lamp 90 passes through the light emitting plate 66 and
It can be radiated to the device 84. for that reason,
A filter 94 is provided so that most of those ultraviolet rays
It is shut off and the projected image of the electronic component 80 is affected.
Have been less. The imaging device 84 converts the projection image into binary signal, and outputs to a control device (not shown).
The control device compares the binarized signal with a binarized signal indicating the position of the legitimate electronic component 80 stored in advance in the memory of the control device itself, and calculates the angle error Δθ about the center line of the electronic component 80 and The center position errors ΔX and ΔY are calculated.

After the component position detection is performed, the electronic component 80 is moved to the mounting position. At this time, the electronic component 80 is moved so that the center position errors ΔX and ΔY are eliminated. During this movement, the servo motor 60 is driven, and the suction tube 78 is rotated to rotate the suction tube 78 by an angle necessary to eliminate the angular error Δθ. Therefore, when the suction tube 78 is positioned at the electronic component mounting position, the printed board and the electronic component 80 are at a relative position suitable for mounting, and the linear slide 12 is lowered, and The held electronic component 80 is pressed to a predetermined position on the printed circuit board and fixed by bonding or the like. In this state, the electronic component 80 is released by switching the electromagnetic directional switching valve to communicate the suction tube 78 to the atmosphere. Thereafter, when the suction tube 78 is raised, the mounting of the electronic component 80 on the printed circuit board is completed.

As described above, in the electronic component holding apparatus of the present embodiment, the holding position of the electronic component 80 by the suction tube 78 is
The electronic component 80 is detected based on the emission of ultraviolet light from a ring lamp 90 provided on the side opposite to the imaging device 84 , but the ultraviolet light is blocked by the light emitting plate 66 and can be detected.
Together are converted to visual light, even blocked by the filter 94, since it does not incident on the imaging device 84, the effects of ultraviolet
A projection image without disturbance due to the electronic component 80 can be obtained.
Position can be easily and accurately detected.
You.

Further, the light emitting plate 66 is inexpensive as compared to the light emitting body provided with eyes in which emits visible light by ultraviolet radiation to the fluorescent paint, a large number of light emitting elements, of the detection device Cost can be reduced.

In the above embodiment, the light emitting plate 66 is composed of the main body 70 and the light emitting layer 72. However, as shown in FIG. 2, an acrylic resin or a polyacetal resin (for example, Duracon of DuPont) or the like is used. The light emitting plate 100 may be formed using a material in which a fluorescent paint is mixed in a synthetic resin. Such a material includes, for example, clear color (trade name) manufactured by Takiron Corporation.

Further, the body 70 of the light emitting plate 66 may be transparent. Moreover, it is provided with a filter that absorbs visible light emitted with ultraviolet rays Li Nguranpu 90
However, this filter can be omitted if the ultraviolet radiation device emits substantially only ultraviolet rays . Ma
If the imaging device itself is not sensitive to ultraviolet light but is sensitive to visible light , the ultraviolet light is blocked by a filter 94.
The filter that allows transmission of visible light can be omitted.

[0019] Furthermore, the light emitting plate <br/> in each of the above embodiments have been a flat, Ru possible der be a tapered tubular or the like. Luminescent plate is visible to ultraviolet light from ultraviolet radiation device
If you change to light and install the electronic components in the direction to illuminate from behind
It is good. Similarly, ultraviolet radiation devices are not limited to circular rings.
It can be assumed to have a shape suitable for emitting light toward the light emitting plate. And the light (ultraviolet light) emitted from the ultraviolet radiation device and the light (visible light) emitted from the light emitting plate
Wavelength is different from that of the
Can be so is not affected by the light that
Therefore, the position of the ultraviolet radiation device, a light-emitting plate may be set in a position to radiate uniformly and efficiently visible light to the electronic component.

In each of the above embodiments, the light emitting plate 66,
10 0 Both are intended to hold the suction tube 7. 8, the light from the close proximity position had been to be able to emit the electronic component 80, provided separately from the suction pipe 7 8,
It may be attached to the arm 16 or the like. Although not specifically exemplified, the present invention can be implemented in various modified and improved embodiments based on the knowledge of those skilled in the art.

[Brief description of the drawings]

FIG. 1 is a front view (a partial cross section) showing an electronic component holding device including a holding position detecting device according to an embodiment of the present invention.

FIG. 2 is a front sectional view showing another embodiment of the light emitting plate constituting the holding position detecting device.

[Explanation of symbols]

66: light-emitting plate 78: suction pipe 80: electronic component 84: imaging device 90: Ring lamp 94: filter 100: emission plate

Continuing from the front page (72) Inventor Shinsuke Suhara 19th Chausan Yamamachi, Chiryu-shi, Aichi Prefecture Inside Fuji Machinery Manufacturing Co., Ltd. (56) References JP-A-62-46382 (JP, A) JP-A-60-103700 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G01B 11 / 00-11/30 B23Q 17/24 B23P 19/00 303 H05K 13/04

Claims (4)

(57) [Claims] A suction surface at an end sucks one surface of an electronic component.
A holder that is attached and held, and is provided at a position facing the suction surface, and is exposed to ultraviolet light.
Instead, an imaging device that is sensitive to visible light, and an imaging device that is provided on the opposite side of the suction surface from the imaging device.
UV radiation device that emits UV light toward the imaging device
Between the device and the ultraviolet radiation device and the adsorption surface,
It is provided so as to surround the entire circumference of the holder, and
Absorbs ultraviolet light from the surface and emits visible light from the surface on the adsorption surface side.
Holding an electronic component, comprising:
Position detection device. 2. The light-emitting plate is made of a material that diffuses light.
A body comprising the body and a surface of the body on the side of the ultraviolet radiation device.
The body is formed and absorbs ultraviolet rays from the ultraviolet radiation device.
2. A light-emitting layer that emits visible light to the side.
Electronic component holding position detecting device. 3. The light emitting plate is fixed to the holder.
The suction tube provided with the suction surface of the holder is located at the center of the light emitting plate.
3. The electrode according to claim 1, which extends through the
Device for detecting the holding position of child parts. 4. The apparatus according to claim 1, wherein the imaging device allows transmission of the visible light.
Equipped with a filter that allows
4. The electronic component according to claim 1,
Holding position detection device.