JPH09275115A - Equipment for positioning board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an equipment for positioning a board so as to perform highly accurate chip mounting on a board, etc., by performing both large-angle horizontal rotation of the board such as a display panel and fine angle accurate horizontal rotation. SOLUTION: A board is placed on the turn table 21 of a turn table part 20. The rack teeth 55a of a rack member 55 are firmly engaged with a gear 56, which integrally rotates with the turn table 21, by being pressed by a press- contact member 51 and a spring 54. The rack member 55 shifts by the shifting mechanisms, such as a nut 43, feed screw 44 and a motor 45, in the direction of the teeth arrangement. When the rack member 55 shifts, the gear 56 rotates, and the rotation angle in the horizontal direction of the board placed on the turn table 21 is adjusted. The deviation of the chip in the rotation direction is corrected by rotating the turn table 21 at a fine angle, and the directions of the longer side and the shorter side of the board are changed by rotating the turn table 21 at a large angle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a board positioning device used in a step of mounting a chip on a board, a step of inspecting a board on which the chip is mounted, and the like.

[0002]

2. Description of the Related Art A display panel of an electronic device such as a word processor, a personal computer and a mobile phone is assembled by mounting a chip which is a driving element on a side edge portion of a substrate such as a glass substrate.
After mounting the chip, the board is inspected to see if the chip is mounted correctly. As the chip, for example, a chip obtained by punching out a film carrier is used.

As a conventional mounting device for this type of chip,
The thing described in Unexamined-Japanese-Patent No. 7-106796 is known. As shown in FIG. 2, the display panel 60 (reference numeral is used in the publication, the same applies hereinafter) is mounted on a movable table 61.
Is composed of an X table 62, a Y table 63, and a θ table (turn table) 64. Electronic components (chips) obtained by punching with the punching device 40 of the film carrier are vacuum-sucked and picked up by the nozzles 54 of the mounting head, and the rotary table 51 is index-rotated in the horizontal direction, whereby the display panel 60 of the display panel 60 is rotated. Bonded (mounted) on the side edge.

The electronic component (chip) 7 is a display panel 60.
Since the display panel 60 is mounted on a plurality of side edges of the
The table 64 can be rotated 90 ° or 180 ° horizontally to change its direction.

[0005]

By the way, extremely high mounting accuracy is required for electronic parts (chips) mounted on a display panel. Therefore, the electronic components are
It must be mounted at a predetermined position on the display panel after accurately correcting the positional deviation in the azimuth direction and the θ (rotation) direction. Therefore, in the above-described conventional electronic component mounting apparatus, the X table 62, the Y table 63, and the θ table 64 are driven to move the display panel 60 in the X direction, the Y direction, and the rotation direction, thereby correcting the positional deviation. It has become.

However, since the θ table 64 is designed to rotate the display panel 60 by a large angle such as 90 ° or 180 °, it is difficult to accurately correct the positional deviation in the θ direction. was there. By the way, the magnitude of the positional deviation in the θ direction is generally a minute angle within 1 °, and in order to correct such a minute angle accurately, the display panel must be extremely minutely rotated. The same problem also occurs in an inspection device that inspects whether or not the chip is correctly mounted on the substrate after mounting the chip on the substrate.

Therefore, an object of the present invention is to provide a substrate positioning device capable of realizing both large-angle horizontal rotation of a substrate such as a display panel and accurate horizontal rotation of a minute angle.

[0008]

SUMMARY OF THE INVENTION The present invention provides a turntable portion for horizontally rotating a substrate such as a display panel,
A turntable on which the substrate is placed, a gear that rotates integrally with the turntable, a rack member that engages with the gear, an elastic contact means that elastically contacts the rack teeth of the rack member with the gear, The rack member is composed of a feed screw for moving the rack member in the direction in which the rack teeth are aligned, a nut, and a moving unit including a motor.

[0009]

According to the present invention, by driving a motor to move a rack member in a rack tooth alignment direction, both a large-angle horizontal rotation of a substrate and an accurate horizontal rotation of a minute angle can be performed. Therefore, the chips can be mounted on the plurality of side edge portions of the substrate with high accuracy. Further, the inspection of the substrate on which the chips are mounted can also be performed by performing a predetermined inspection while surely putting the chips one by one into the visual field of the camera.

Next, an embodiment of the present invention will be described with reference to the drawings. 1 is a perspective view of a chip mounting apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view of the turntable portion,
3 is a plan view of the turntable portion, and FIG. 4 is a side view of the turntable portion.

In FIG. 1, a movable table portion 10 which is a substrate positioning device is provided on a base 1.
The movable table unit 10 is configured by stacking an X table unit 11, a Y table unit 12, and a turntable unit 20. The turntable unit 20 includes a turntable 21 on which the substrate 2 is placed. Reference numeral 13 is a motor for driving the X table portion 11, and 14 is a motor for driving the Y table portion 12. When the X table unit 11 and the Y table unit 12 are driven, the turntable unit 20 holding the substrate 2 moves to X
Move horizontally in the Y direction. That is, the X table unit 1
The 1 and Y table portions 12 are moving table portions that horizontally move the turntable portion 20 that holds the substrate 2. When the turntable unit 20 is driven, the substrate 2 rotates horizontally.

A gate-shaped support portion 3 is provided on a side portion of the base 1. A moving mechanism section 4 is provided on the upper portion of the support section 3. The moving mechanism unit 4 holds a mounting head 5. The mounting head 5 has a nozzle 6. Behind the support portion 3, there is provided a base portion 9 on which a tray 8 as a chip supply portion for accommodating the chips 7 is placed. When the moving mechanism unit 4 is driven, the mounting head 5 moves between the tray 8 and the substrate 2, and the chips 7 provided on the tray 8 are vacuum-sucked and picked up by the lower end portion of the nozzle 6 to pick up the substrate 2. Mount on the side edge. As the chip supply unit, in addition to the tray, a punching mechanism for punching the film carrier with a die and supplying the same is also used. Below the moving path of the mounting head 5, a camera 33 as a detection means for observing the chip held by the nozzle 6 from the lower side and detecting the positional deviation thereof.
Is provided.

Next, the detailed structure of the turntable portion 20 will be described with reference to FIGS. Reference numeral 22 is a base plate, and a supporting wall 23 is provided upright. On the front of the branch wall 23,
An elevating table 24 having a key-shaped cross section is provided. On the front surface of the support wall 23, a slider 2 slidably fitted to a vertical guide rail 25 mounted on the back surface of the lifting table 24.
6 are provided.

In FIG. 4, a motor 27 is mounted on the base plate 22.
Is provided. An encoder 28 and a cam 30 are provided on the rotation shaft of the motor 27. Reference numeral 29 is a sensor that detects the amount of rotation of the encoder 28. A roller 31 that contacts the cam 30 is provided on the inner surface of the lift table 24. The lift table 24 is elastically urged downward by a spring 32, and the roller 31 is in contact with the cam 30 by the spring force thereof. Therefore, when the motor 27 is driven and the cam 30 rotates, the elevating table 24 is moved to the guide rail 25 and the slider 26.
Guided to go up and down. The amount of elevation is the encoder 28
Is detected by the sensor 29.

In FIG. 2, a movable plate 40 is provided on the upper surface of the lift table 24. In FIG. 4, the movable plate 40
The slider 41 is provided on the lower surface of the slider 41.
Is slidably fitted to a horizontal guide rail 42 arranged on the upper surface of the lifting table 24. A nut 43 is attached to the lower surface of the movable plate 40. The nut 43 is screwed onto a horizontal feed screw 44 parallel to the guide rail 42. In FIGS. 2 and 3, a motor 45 for rotating the feed screw 44 is mounted on the side of the lift table 24.
46 is an encoder mounted on the rotating shaft of the motor 45, and 4
A sensor 7 detects the amount of rotation of the encoder 46.

At the center of the side of the movable plate 40, a hook-shaped plate 48 is mounted. Further, a start end sensor 49 and a end sensor 50 for detecting the plate body 48 are provided on both sides of the upper surface of the lift table 24. When the motor 45 is driven and the feed screw 44 rotates, the movable plate 40 moves to the guide rail 42.
Along with the horizontal movement in the horizontal direction, the amount of movement is detected by the encoder 46 and the sensor 47. Further, the movement of the movable plate 40 to the start limit point is detected by the start sensor 49, and the movement of the movable plate 40 to the end limit point is detected by the end sensor 50.

In FIG. 4, an elastic contact member 51 is provided above the movable plate 40. A slider 52 is attached to the lower surface of the elastic contact member 51. The slider 52 is the movable plate 4
It is slidably fitted to a guide rail 53 provided on the upper part of the table. The elastic contact member 51 elastically presses the rack member 55 attached to the front portion thereof by the spring 54 against the gear 56. A gear 56 is provided below the turntable 21. When the rack member 55 is elastically pressed from behind by the elastic contact member 51, the rack teeth 5 of the rack member 55 are
The gear 5a is firmly elastically engaged with and engaged with the gear 56. That is, the elastic contact member 51, the spring 54, etc. are elastic contact means for elastically contacting the rack teeth 55 a with the gear 56.

As shown in FIG. 4, an upright pipe 57 is connected to the lower portion of the turntable 21. The pipe 57 is connected to a pneumatic unit (not shown) via an elbow 58. The pipe 57 is held by a bearing 59 so as to be rotatable around its axis. Reference numeral 60 is a support cylinder for the bearing 59. The turntable 21 and the gear 56 are integrally attached to the upper portion of the pipe 57.
As shown in FIG. 1, the substrate 2 is placed on the turntable 21. The substrate 2 is firmly vacuum-adsorbed and held on the turntable 21 by driving the air pressure unit and performing vacuum suction through the pipe 57. A large number of concentric grooves 61 are formed on the upper surface of the turntable 21. The groove 61 serves as a slip stopper for the substrate 2.

When the motor 45 shown in FIG. 1 is driven to rotate the feed screw 44, the nut 43 moves along the feed screw 44. As a result, the movable plate 40 and the elastic contact member 51 and the rack member 55 on the movable plate 40 move in the tooth alignment direction of the rack teeth 55a (longitudinal direction of the rack member 55), whereby the gear 56 rotates and the turntable 21. Gear 5
It rotates together with 6. This makes the turntable 2
The substrate 2 on 1 rotates horizontally. In this case, the rack member 5
Since 5 is elastically pressed toward the gear 56 by the spring force of the spring 54, the rack teeth 55a are firmly engaged with the gear 56, so that the gear 56 can rotate accurately without rattling.

The mounting device of this chip is constructed as described above, and the overall operation will be described below. As shown in FIG. 1, the substrate 2 is placed on the turntable 21, and the X table unit 11, the Y table unit 12, and the turntable unit 20 are driven to move the substrate 2 in the X direction, the Y direction, and the rotation direction. It is moved and the long side of the substrate 2 is positioned at a predetermined position on the mounting head 5 side as shown in the figure. Therefore, the mounting head 5 moves above the tray 8 to pick up the chips 7 of the tray 8 by vacuum suction on the lower end of the nozzle 6, and moves toward the substrate 2. In the middle of the process, the chip 7 vacuum-adsorbed by the nozzle 6 is observed from below with the camera 33, and the X direction of the chip 7,
Positional deviations in the Y and rotation directions are detected.

Of the detected positional deviations, positional deviations in the X direction are corrected by driving the X table portion 11 to move the substrate 2 in the X direction, and positional deviations in the Y direction drive the Y table portion 12. Then, the substrate 2 is moved in the Y direction for correction, and the positional deviation in the rotational direction is corrected by driving the turntable unit 20. The turntable 21 of the turntable unit 20 is horizontally rotated by driving the motor 45 to rotate the gear 56, and the rotation direction is corrected. The rotation of the gear 56 causes the nut 43 to move with the feed screw 44. Since it is carried out by moving the gear 56 along with, the gear 56 can be precisely rotated and the positional deviation in the rotational direction can be carried out with high accuracy. Moreover, since the rack teeth 55a of the rack member 55 are firmly engaged with the gear 56 by being elastically repelled by the spring 54, the gear 56 can be accurately rotated without rattling.

When the positional deviations in the X-direction, the Y-direction, and the rotation direction have been corrected as described above, the mounting head 5 has the substrate 2
Of the chip 7 is mounted on the side edge portion of the substrate 2 by moving the nozzle 6 downward and upward there. When the chip 7 is a chip obtained by punching a film carrier, the lead is bonded by thermocompression bonding to the electrode on the side edge portion of the substrate 2 by thermocompression bonding means. Since this is a well-known mechanism, its explanation is omitted.

In FIG. 1, the mounting head 5 repeatedly moves back and forth between the tray 8 and the substrate 2 so that the substrate 2
A predetermined number of chips 7 are mounted in a horizontal row on the side edge of the long side of the. When the mounting of the chip 7 on the long side is completed, the motor 45 is driven to rotate the turntable 21 largely (90 °), and the short side of the substrate 2 is directed to the mounting head 5 side. And by repeating the above operation,
The chip 7 is also mounted on the short side edges of the substrate 2. In general, the type of the chip 7 is different between the long side and the short side of the substrate 2, and in this case, the chip 7 supplied to the mounting head 5 is different.
To change. As described above, the chip 7 for the substrate 2
When the mounting of is completed, the substrate 2 is turnedtable 21
From the turntable 2
The next substrate 2 is placed on the substrate 1, and the above-described work is repeated.

The present invention is not limited to the above-mentioned embodiment, and other embodiments are possible. That is, for example, in FIG. 1, after mounting the chip 7 on the substrate 2, the chip 7 is mounted on the substrate 2.
It can also be used in a board inspection process for inspecting whether or not the board is correctly mounted. In this case, the camera 33 is also used as this inspection camera, and while the substrate 2 is accurately horizontally rotated to a large angle or a minute angle as described above, the chip 7
It is possible to perform the inspection while surely putting each one in the visual field of the camera 33. Of course, a board inspection device may be provided separately from the chip mounting apparatus shown in FIG. 1, and the board on which the chips have been mounted may be conveyed to the board inspection apparatus to inspect the board. it can. As described above, the substrate positioning apparatus of the present invention can be used in various steps in a substrate assembly line.

[0025]

According to the present invention, the motor of the turntable portion is driven to move the rack member in the direction in which the rack teeth are aligned, so that a large-angle horizontal rotation of the substrate and an accurate horizontal rotation of a minute angle are performed. Therefore, the chips can be accurately and accurately mounted on the plurality of side edge portions of the substrate. Also, the inspection of the board on which the chip is mounted
It is possible to perform a predetermined inspection while surely putting the chips one by one into the visual field of the camera. As described above, according to the present invention, it is possible to accurately position the substrate and perform a predetermined work in various steps in the substrate assembly line.

[Brief description of drawings]

FIG. 1 is a perspective view of a chip mounting apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of a turntable portion of the chip mounting apparatus according to the embodiment of the present invention.

FIG. 3 is a plan view of a turntable portion of the chip mounting apparatus according to the embodiment of the present invention.

FIG. 4 is a side view of a turntable portion of the chip mounting apparatus according to the embodiment of the present invention.

[Explanation of symbols]

 2 substrate 4 moving mechanism part 5 mounting head 6 nozzle 7 chip 8 tray 10 movable table part 11 X table part 12 Y table part 20 turntable part 21 turntable 40 movable plate 43 nut 44 feed screw 45 motor 51 elastic contact member 54 spring 55 rack member 55a rack tooth 56 gear

Claims (1)

[Claims] 1. A substrate positioning device comprising: a turntable part for placing a substrate thereon; and a moving table part for horizontally moving the turntable part, wherein the turntable part places the substrate on the substrate. A turntable and a gear that rotates integrally with the turntable,
A rack member that engages with this gear, an elastic contact means for elastically contacting the rack teeth of this rack member with this gear, a feed screw, a nut, and a motor for moving this rack member in the tooth alignment direction of the rack teeth. A substrate positioning device, comprising: