JPH0577186A - Electronic parts holding device - Google Patents

Abstract

PURPOSE:To provide an electronic parts holding device capable of vacuum- sucking an electronic component without the suitable face to close a suction nozzle at the part to be held. CONSTITUTION:A transparent cover 140 made of synthetic resin is fitted to the lower end part, protruding from a light emitting plate, of a suction tube 102. At the time of holding a connector 10, the cover 140 is brought into contact with the opening periphery of a body 18 by the descent of the suction tube 102 so as to close the opening and thereby to form a vacuum pressure chamber 150 communicated with the suction tube 102, and the connector 10 is sucked by the supply of vacuum. The light radiated by the light emitting plate is transmitted through the cover 140 so as to irradiate the connector 10, and a holding position is detected by the pickup of a projected image.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for holding electronic parts, and more particularly to a device for holding electronic parts by vacuum.

[0002]

2. Description of the Related Art An electronic component holding device includes a device that has a suction nozzle and suctions an electronic component by vacuum.
The suction nozzle is brought into close contact with the end surface of the electronic component, and the vacuum is supplied to the space inside the suction nozzle closed by the electronic component to suck the electronic component. When the electronic component is held by the suction nozzle in this way, it is desirable that the axis of the electronic component be positioned in the vertical direction and held on the axis. This is because, if held in this way, the electronic component can be easily mounted on the mounting target member and can be stably held, but it is difficult for some electronic components. For example, in the case of a connector that is formed into a container opening larger than the suction nozzle, and pins are erected inside the container, and the connector is mounted with the opening facing upward, even if you try to hold the upper part,
Because of the opening, the suction nozzle cannot be closed, and the suction cannot be performed by vacuum. Therefore, conventionally, in such a case, the electronic component is held by the four claws, or the flat side surface of the electronic component having no opening is adsorbed.

[0003]

However, when four claws are used, the claws are provided so as to be openable and closable.
A device for opening and closing the claw is required, which complicates the device configuration and increases the cost. Further, when the side surface of the electronic component is sucked, the electronic component is held in a cantilevered manner, and the holding force is weak and unstable, which is not suitable for practical use. It is an object of the invention of claim 1 to provide an electronic component holding device capable of stably sucking an electronic component having no surface suitable for closing the suction nozzle at a portion to be sucked by the suction nozzle by vacuum. It was done. According to a second aspect of the present invention, there is provided an electronic component holding device having a function of detecting a holding position by picking up an image of an electronic component, and a surface suitable for closing the suction nozzle at a portion to be sucked by the suction nozzle. It is an object of the present invention to provide an electronic component holding device capable of stably sucking a non-existent electronic component by vacuum.

[0004]

In order to solve the above-mentioned problems, the invention according to claim 1 is such that the suction nozzle is brought into close contact with a portion on the outer peripheral side of a portion facing the suction nozzle of the electronic component. The gist is to provide a cover that forms a vacuum pressure chamber that communicates with the suction nozzle in cooperation with the electronic component. In order to solve the above-mentioned problems, the invention of claim 2 has: (a) a suction nozzle that sucks an electronic component by vacuum; (b) a light emitting member that emits light toward the electronic component; In an electronic component holding device including an image pickup device for picking up an image of an electronic component formed by the light emitted by the light emitting member, the suction nozzle has optical transparency and faces the suction nozzle of the electronic component. The gist of the present invention is to provide a cover that forms a vacuum pressure chamber that is in close contact with the electronic component and that communicates with the suction nozzle by closely contacting the portion on the outer peripheral side of the portion.

[0005]

In the electronic component holding apparatus according to the first aspect of the present invention, even if the portion of the electronic component to be sucked by the suction nozzle does not have a surface suitable for closing the suction nozzle, the surface on the outer peripheral side of that portion A vacuum pressure chamber is formed when the cover is in close contact with the cover, and electronic components are adsorbed by the vacuum supplied to the vacuum pressure chamber. In the electronic component holding apparatus according to the second aspect of the present invention, the electronic component is also adsorbed in the same manner, but since the cover has a light-transmitting property, it does not interfere with the irradiation of light to the electronic component, and the imaging is performed. An electronic component can be imaged by the device.

[0006]

As described above, according to the first aspect of the present invention, even if the portion of the electronic component to be sucked by the suction nozzle does not have a surface suitable for closing the suction nozzle, it is the same as when the surface is provided. Moreover, the electronic component can be sucked by vacuum, the holding force does not become insufficient, the electronic component can be stably held, and the device can be configured easily and inexpensively. According to the invention of claim 2, in addition to the effect of the invention of claim 1, the holding position of the electronic component can be detected by capturing an image of the electronic component, and the mounting position can be corrected.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment common to the inventions of claims 1 and 2 will be described below in detail with reference to the drawings.

FIGS. 8, 9 and 10 show connectors 10, 12 and volume 14 as electronic components held by the electronic component holding device of this embodiment, respectively.
The main body 18 of the connector 10 shown in FIG. 8 has a rectangular container shape and is mounted on a printed circuit board with the opening 20 facing upward.
A plurality of pins 22 are erected inside the main body 18. These pins 22 have a length that does not project from the opening 20 to the outside of the main body 18. Further, a plurality of lead wires 24 are attached to each of two sides of the bottom of the main body 18 which are parallel to the longitudinal direction. Main body 2 of connector 12 shown in FIG.
Reference numeral 6 is a hollow rectangular parallelepiped, and a plurality of through holes 28 communicating with the inside are formed on one surface thereof, and the through holes 28 are mounted upward. In addition, it is parallel to the longitudinal direction of the bottom of the body 26.
A plurality of lead wires 30 are attached to each side. The volume 14 shown in FIG.
A cylindrical knob 34 is rotatably attached to the. A concave spherical surface 36 is formed on the upper surface of the knob 34.

Next, the electronic component holding device will be described. In FIG. 2, reference numeral 40 denotes a device body of an electronic component mounting device having an electronic component holding device. This device body 40
Is moved in the X-axis direction perpendicular to the paper surface by a moving device (not shown). A through hole 42 penetrating in the vertical direction is formed in the apparatus main body 40, and a nut 44 and a spline member 46 are concentrically supported and rotatably supported at a distance in the vertical direction. A male screw portion 50 of the hollow rod 48 is screwed into the nut 44, and a spline portion 52 formed below the male screw portion 50 of the hollow rod 48 is fitted to the spline member 46. The nut 44 and the spline member 46 are a ball nut and a ball spline member that hold a large number of balls in order to remove backlash and reduce friction. A gear 54 is fixed to an upper end portion of the nut 44 protruding from the apparatus main body 40, and is meshed with a gear 58 fixed to an output shaft of a nozzle lifting servomotor 56, so that the nut 44 moves the nozzle lifting servomotor 56. The hollow rod 48 is moved up and down by being rotated by. 60 is
It is an encoder that detects the rotation angle of the nozzle lifting servomotor 56. A gear 62 is fixed to a lower end portion of the spline member 46 protruding from the apparatus main body 40, and is meshed with a gear fixed to an output shaft of a nozzle rotation servo motor (not shown). By rotating 46,
Hollow rod 48 is rotated about its axis.

A chuck adapter 66 and a chuck 68 are attached to the lower end portion of the hollow rod 48, and these three portions form a holding portion 71 of the suction nozzle 70. As shown in FIGS. 1 and 3, the chuck adapter 66 is composed of two diametrically separated ears 74, 76 extending outward in the radial direction at one end of the cylindrical portion 72. The ear piece 76 is formed with a slit 78 extending in the axial direction of the cylindrical portion 72 and opening to the inner peripheral surface of the cylindrical portion 72. The inner peripheral surface of the cylindrical portion 72 has a stepped shape, and is fitted to the lower end portion of the hollow rod 48 in the large-diameter hole portion 80 on the side where the ear pieces 74 and 76 are provided, and the ear piece 76 has a screw (not shown). The slit 78 is contracted by screwing with, and the large diameter hole portion 80 is contracted in diameter, and is attached to the hollow rod 48 so as not to slip out.

The chuck 68 has a cylindrical portion 82 as shown in FIGS. 1 and 4, like the chuck adapter 66.
And a pair of ear pieces 84 and 86 provided at one end thereof, and a slit 88 is formed in one ear piece 86. The chuck 68 includes the ear pieces 84, 8 of the cylindrical portion 82.
6 is fitted into the cylindrical portion 72 of the chuck adapter 66 in the small diameter hole portion 90 formed on the side where the ear piece 86 is provided.
It is attached to the chuck adapter 66 by screwing a screw (not shown). The lower end of the inner peripheral surface of the cylindrical portion 82 is a large-diameter hole portion 92, and pins 94 project into the large-diameter hole portion 92 at two locations diametrically separated from each other on the peripheral wall of the large-diameter hole portion 92. It is fitted in the direction.

As shown in FIG. 1, the suction nozzle 70 includes a sleeve 100 and a suction tube 1 fitted to the sleeve 100.
02 and. The sleeve 100 has a stepped shape,
A compression coil spring 106 (hereinafter abbreviated as spring 106) is fitted to the small diameter portion 104, and one end thereof is supported by a shoulder surface 110 between the small diameter portion 104 and the large diameter portion 108. In addition, the large diameter portion 108 of the sleeve 100
1 and 6 at the end opposite to the small diameter portion 104 of FIG.
As shown in FIG. 3, the engaging portion 112 having a substantially rectangular shape is formed, and the ears 114 are formed at both ends in the longitudinal direction of the engaging portion 112, and the ears 114 are respectively illustrated in the drawing. As shown in FIG. 5, an inclined surface 116 is formed. These inclined surfaces 116 are inclined with respect to a plane parallel to the axis of the sleeve 100 and are located on the same plane. Further, a fitting portion 118 having a circular cross section is provided on the lower surface of the engaging portion 112, and a light emitting plate 120 as a light emitting member is fitted and fixed on the outer peripheral surface thereof, while the suction tube 102 is fitted on the inner peripheral surface thereof. They are joined together and penetrate the light emitting plate 120 to project downward. The light emitting plate 120 receives an ultraviolet ray and emits a visible ray when the holding posture of the electronic component is detected by the suction nozzle 70.

In the middle of the movement path of the electronic component holding device,
An imaging device 122 is provided as shown in FIG. The image pickup device 122 includes a lens 124 and a camera 126, and faces the light emitting plate 120 with the electronic component held by the suction pipe 102 interposed therebetween in a state where the suction pipe 102 is positioned directly above the image pickup device 122. It is provided to do. Around the lens 124 of the imaging device 122,
A ring lamp 128 is provided and attached to a frame (not shown). The ring lamp 128 emits ultraviolet rays, and a ring-shaped first filter 130 that allows only ultraviolet rays to pass through on the side facing the light emitting plate 120.
Is provided and is supported by the frame. Therefore, the light emitting plate 120 is irradiated with only ultraviolet rays, absorbs the ultraviolet rays, and emits visible light. Light emitting plate 12
The wavelength of the light emitted to 0 and the wavelength of the light emitted from the light emitting plate 120 are different from each other.

Further, the image pickup device 122 includes a lens 12
The second filter 1 is located at a position close to 4 and facing the electronic component.
32 is provided so as to be supported by a frame that supports the first filter 130. The second filter 132 absorbs ultraviolet rays while permitting transmission of visible rays, and only the visible rays emitted by the light emitting plate 120 enter the imaging device 122.

As shown in FIG. 1, a cover 140 is attached to the lower end portion of the adsorption tube 102 protruding from the light emitting plate 120. The cover 140 includes the connectors 10, 12
It has a square shape larger than the volume 14 and is made of a transparent and hard synthetic resin.

When attaching the suction nozzle 70 to the holding portion 71, the pair of ears 114 of the engaging portion 112 and the chuck 6 are attached.
The small diameter portion 104 of the sleeve 100 is fitted into the small diameter hole portion 142 provided at the lower end portion of the cylindrical portion 72 of the chuck adapter 66 in a state of being out of phase with the pin 94 of No. 8. The sleeve 100 starts from the state where the other end of the spring 106 abuts on the cylindrical portion 72 of the chuck adapter 66, and
06 is compressed and fitted, and after the engaging portion 112 reaches the position beyond the pin 94, it is rotated to a position where the phase of the ear portion 114 and the pin 94 match.

When the force applied to the sleeve 100 in that state is released, the sleeve 100 is released from the spring 10
6 is urged by 6 to move the chuck 68 in a direction to come out of the chuck 68, the inclined surface 116 engages with the pin 94, and is relatively movable in the axial direction with respect to the chuck 68, but cannot come out. By engaging with 94, it will be attached so that relative rotation is impossible. Since the inclined surfaces 116 are inclined in the same direction, the torque applied to the sleeve 100 is balanced due to the effect of the inclined surface, and the sleeve 100 does not rotate. In this way, the suction nozzle 70 attached to the chuck 68 sucks electronic components by vacuum and mounts them on the printed circuit board 144 as a mounting target member. The suction nozzle 70
When removing the spring from the holding portion 71, the spring 106
The sleeve 100 may be moved to the hollow rod 48 side while compressing, and the inclined surface 116 and the pin 94 may be disengaged from each other, and then the sleeve 100 may be rotated and the phases thereof may be deviated from the chuck adapter 66.

The hollow rod 48, as shown in FIG.
A pipe 146 is fitted to the inner peripheral surface of the pipe so as to be relatively movable in the axial direction. Due to its own weight, the pipe 146 is, as shown in FIG. 1, the suction nozzle 7 held by the holding portion 71.
0 of the sleeve 100 is in contact with the upper surface. The pipe 146 detects the start of relative movement between the suction nozzle 70 and the hollow rod 48, as described in the specification of Japanese Patent Application No. 3-176038 related to the present applicant, and the electronic component is printed circuit board. This is for controlling the pressing force when mounting on 144 to an optimum magnitude, but since it is not directly related to the present invention, description thereof is omitted.

When the connector 10 is mounted on the printed circuit board 144 by the electronic component mounting apparatus configured as described above, the electronic component holding device is moved to the electronic component supply position and the suction tube 102 is in the component supply device. The suction nozzle 70 is lowered in a state of being positioned on the connector 10 to be received. The connector 10 is housed in the component supply device with the opening 20 that is on the upper side when mounted, facing upward, and when the suction nozzle 70 is lowered, the suction pipe 102 faces the opening 20, and as shown in FIG. ,
The cover 140 is brought into contact with the upper surface of the main body 18. At this time, the suction nozzle 70 is slightly lowered even after the cover 140 abuts, but the sleeve 100 compresses the compression coil spring 106 and moves with respect to the hollow rod 48. The damage of 140 is avoided, and the cover 140 is brought into close contact with the periphery of the opening 20.

The opening 20 is larger than the end face of the suction nozzle 70 and forms a quadrangle that completely encloses a circle that is a projected figure of the outer peripheral surface of the suction nozzle, and the periphery of the opening 20 is a strip-like shape that surrounds the quadrangle without interruption. Is a face. Therefore, if the cover 140 is closely attached to the periphery of the opening 20, the opening 2
0 is substantially airtightly closed, and the main body 18 and the cover 14
By 0, a vacuum pressure chamber 150 communicating with the suction pipe 102 is formed, a vacuum is supplied to the vacuum pressure chamber 150, and the connector 10 is suctioned. Since the cover 140 is made of a hard synthetic resin, when the connector 10 is brought into close contact with the connector 10 and the connector 10 is adsorbed, the cover 140 is not distorted or deformed, and an error may occur in the holding posture of the connector 10. Absent.

After suction, the suction nozzle 70 is raised,
The device body 40 is moved and the suction tube 102 is positioned directly above the imaging device 122. Then, of the light emitted from the ring lamp 128, only ultraviolet rays pass through the first filter 130 and are emitted toward the light emitting plate 120.
The cover 1 is provided between the first filter 130 and the light emitting plate 120.
Although there is 40, since the cover 140 is transparent, it does not prevent the ultraviolet light from reaching the light emitting plate 120, and the light emitting plate 120 absorbs the ultraviolet light and emits visible light toward the connector 10. The visible light passes through the cover 140 and illuminates the connector 10, and further enters the lens 124 to form a projected image of the connector 10 on the solid-state image sensor surface of the image pickup device 122.

At this time, the ultraviolet light emitted by the ring lamp 128 hits the connector 10 and peripheral equipment, and the reflected light is directed to the image pickup device 122. However, the second filter 132 absorbs the ultraviolet light, and therefore the light emitted by the light emitting plate 120. Forms a clear projected image without being affected by the reflected light from the connector 10 or the like. The image pickup device 122 converts this projection image into a binarized signal and outputs it to a control device (not shown). The control device compares the binarized signal with a binarized signal indicating the position of the regular connector 10 stored in advance in the memory of the control device itself, and compares the angular error Δθ about the center line of the connector 10 with the center position. The errors ΔX and ΔY are calculated.

After the component position is detected in this way, the connector 10 is moved to the mounting position. At this time, the connector 10 is moved so as to eliminate the center position error ΔX, and the movement thereof is performed. During this period, the nozzle rotation servomotor is driven to rotate the suction pipe 102 by an angle necessary to eliminate the angle error Δθ, and the printed circuit board 144 causes the center position error ΔY.
It can be moved the distance necessary to eliminate. Therefore, in the state where the suction pipe 102 is positioned at the electronic component mounting position, the printed board 144 and the connector 10 are in the relative position suitable for mounting, and the suction nozzle 7 is located.
0 is lowered, the connector 10 held by the suction tube 102 is pressed to a predetermined position on the printed circuit board 144, and is fixed by adhesion or the like. In this state, the vacuum directional chamber 150 is made to communicate with the atmosphere by switching the electromagnetic directional control valve, so that the connector 10 is released, and thereafter, if the suction tube 102 rises, the printed circuit board 1 of the connector 10 is released.
The attachment to 44 is completed.

When the connector 12 is held by the electronic component holding apparatus according to the present embodiment, the cover 140 is formed in the through hole 28 of the connector 12 and is brought into close contact with the end face which is the upper side at the time of mounting. As a result, all the through holes 28 are closed, and the portion of the main body 26 where there is no through hole 28 and the cover 14
0 forms a vacuum pressure chamber, or a part of the through hole 28 faces the suction pipe 102, and the cover 14
The vacuum pressure chamber is formed by the space in the main body 26, the through hole 28, and the cover 140 without being covered by 0. Then, the connector 12 is sucked by the vacuum supplied from the suction pipe 102 to the vacuum pressure chamber.

When the volume 14 is held, the cover 140 contacts the tip surface of the knob 34, and a vacuum pressure chamber is formed between the cover 140 and the concave spherical surface 36 so that the volume 14 is held.
Are adsorbed. Since the end surface of the knob 34 is a flat surface,
When the cover 140 contacts the knob 34, the knob 34
And the axis of the adsorption tube 102 are substantially concentric, and the volume 14 can be held without tilting.

Another embodiment of the present invention is shown in FIG. The electronic component holding device according to the present embodiment has a connector 16 shown in FIG.
It holds 0. Main body 162 of connector 160
Has a U-shaped cross section, and a plurality of pins 166 having a length protruding from the opening 164 are erected inside the main body 162. Reference numeral 168 is a lead wire.

The cover 170 of the present electronic component holding device is in the shape of a shallow container, and is covered with the main body 162 of the connector 160 so as to be in close contact with the periphery of the opening 164 and have a shape and dimensions that close the opening 164. There is.

When holding the connector 160, the suction nozzle 70 descends to cover the main body 162 with the cover 170 as shown in FIG. 14, and closely adheres to the peripheral edge of the opening 164 to form the vacuum pressure chamber 172. The connector 160 is attracted by the vacuum supplied to the vacuum pressure chamber 172.

In each of the above embodiments, the cover 14
Although 0 and 170 were supposed to be transparent, the light emitting plate 120
It suffices to allow the transmission of the light emitted by, and may be a semitransparent one. Also, instead of making the cover with a hard material, it is possible to make it with a material having a slight flexibility, or to form a thin layer of a flexible material on the surface of the hard material,
The airtightness of the contact surface between the cover and the electronic component can be improved.

In each of the above embodiments, the cover 1
Although the light emitting members 40 and 170 are different from the light emitting member that emits light to the electronic component, the light emitting member may also serve as a cover.

Further, in each of the above embodiments, the light emitting member is supposed to absorb ultraviolet rays and emit visible rays. However, the diffuser plate for diffusing the light emitted from the light source and the reflecting plate for reflecting the light. Alternatively, a light emitting device including a light emitting diode may be used. Further, both the image pickup device and the light emitting member may be provided on the side opposite to the suction nozzle with respect to the electronic component, and an image of the electronic component may be formed by reflected light to pick up the image.

Further, when the image of the electronic component is not captured, the light emitting plate 120 and the image pickup device 122 are not necessary. A mode without them is not included in the invention of claim 2, but the invention of claim 1 is Included.

Further, when the image of the electronic component is not captured, or when the image formed by the reflected light of the electronic component is captured even when the image is captured, it is not necessary to make the cover light transmissive. It is possible to use opaque materials.

In addition, the present invention can be implemented in various modified and improved modes based on the knowledge of those skilled in the art without departing from the scope of the claims.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an electronic component holding device which is an embodiment common to the inventions of claims 1 and 2. FIG.

FIG. 2 is a front sectional view showing an electronic component mounting device including the electronic component holding device.

FIG. 3 is a plan view showing a chuck adapter of a holding unit that holds a suction nozzle in the electronic component holding device.

FIG. 4 is a plan view of a chuck attached to the chuck adapter.

FIG. 5 is a front view showing a sleeve that constitutes the suction nozzle.

FIG. 6 is a bottom view of the sleeve.

FIG. 7 is a front view (partial cross section) showing the suction nozzle together with an imaging device.

FIG. 8 is a perspective view showing a connector held by the electronic component holding device.

FIG. 9 is a perspective view showing another connector held by the electronic component holding device.

FIG. 10 is a perspective view showing a volume held by the electronic component holding device.

FIG. 11 is a front view (partial cross section) showing a state in which the connector shown in FIG. 8 is held by the electronic component holding device.

FIG. 12 is a front view (partial cross section) showing a suction nozzle of an electronic component holding device according to another embodiment of the present invention.

13 is a perspective view showing a connector held by the electronic component holding device shown in FIG.

14 is a front view (partial cross section) showing a state in which the connector shown in FIG. 13 is sucked by the suction nozzle shown in FIG.

[Explanation of symbols]

 10 Connector 12 Connector 14 Volume 70 Suction Nozzle 120 Light Emitting Plate 122 Imaging Device 140 Cover 150 Vacuum Pressure Chamber 160 Connector 170 Cover 172 Vacuum Pressure Chamber

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seiichi Terui No. 19 Chausan, Yamamachi, Chiryu-shi, Aichi Fuji Machinery Manufacturing Co., Ltd. (72) Inventor Yuji Katsumi 19 No. Fuji Machine Manufacturing Co., Ltd.

Claims (2)

[Claims] 1. An electronic component holding device having a suction nozzle for sucking an electronic component by vacuum, wherein the suction nozzle is brought into close contact with a portion of an outer peripheral side of a portion of the electronic component facing the suction nozzle, and An electronic component holding device comprising a cover that forms a vacuum pressure chamber that communicates with a suction nozzle in cooperation with a component. 2. A suction nozzle for sucking an electronic component by vacuum, a light emitting member for emitting light toward the electronic component, and an image of the electronic component formed by the light emitted by the light emitting member. In the electronic component holding device including the image pickup device, the suction nozzle has optical transparency, and the electronic component is adhered to a portion of the electronic component on the outer peripheral side of a portion facing the suction nozzle. An electronic component holding device comprising a cover that forms a vacuum pressure chamber that communicates with a suction nozzle in cooperation with the electronic component holding device.