JP2002232191A - Electronic component mounter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic component mounter which can quickly align a head part for positioning with high accuracy and mount multi-commodity electronic components at a high speed with high accuracy. SOLUTION: An electronic component mounter has X-axis parts 3A, 3B for driving a head in an X-axis direction, and a Y-axis part 4 for driving the X-axis parts 3A, 3B in a Y-axis direction. The Y-axis part 4 is constituted by tables 8A, 8C for driving one end of the X-axis parts 3A, 3B in the Y-axis direction; tables 8B, 8D for restricting movement in the Y-axis direction of another end of the X-axis parts 3A, 3B; position detection means 10A, 11A, 10B, 11C for detecting a position of the table 8A, 8C; and a control unit 12 which drives the tables 8A, 8C, so that one end of the X-axial parts 3A, 3B approaches a target position, and brakes another end of the X-axis parts 3A, 3B by the tables 8B, 8D at a timing of detecting an approach to the target position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component mounting apparatus.

[0002]

2. Description of the Related Art In recent years, there have been a wide variety of types of electronic components, so that a variety of electronic components can be handled, from micro chip components to electronic components such as long connectors.
There is a strong demand for an electronic component mounting apparatus capable of realizing high productivity.

FIG. 4 shows a configuration of a driving section of a conventional electronic component mounting apparatus having a plurality of head sections. Each head 21
Has a plurality of nozzles 22 to which electronic components can be attached by suction. The nozzles 22 are attached to an X-axis portion 23 and can be moved in the X-axis direction by driving means provided on the X-axis portion 23.
Each of the X-axis portions 23 is connected to the Y-axis portion 25 at one end of an articulation portion 24, and is movably supported at the other end by a guide 26.
7 is moved in the Y-axis direction as it is rotated by the drive motor 28. Therefore, the plurality of head units 21 are movable in the X-axis direction and the Y-axis direction, respectively, and by such a driving method, various types of electronic components are efficiently mounted and high productivity is realized.

[0004]

However, in the above-described conventional drive-type electronic component mounting apparatus, the head section 21 is required.
X-axis part 2 supported by guide 26 at the time of positioning
3 has a problem that the behavior of the driven side end cannot be completely controlled, and it takes time to position the head 21. Further, depending on the position of the head section 21, the drive motor 28
However, there is a problem that stable positioning accuracy cannot be ensured because the load changes.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic component mounting apparatus capable of quickly and accurately positioning and setting a head portion on which an electronic component is sucked and mounted.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a method of mounting a head portion on an X-axis.
The configuration in which both ends of the shaft portion can be subjected to a positioning settling operation at the same timing enables quick positioning of the head portion.

That is, according to the first aspect of the present invention, an X-axis portion for driving a mounting head portion capable of holding a component to be mounted in the X-axis direction, and driving in the Y-axis direction while supporting both ends of the X-axis portion. An electronic component mounting apparatus having a Y-axis portion, wherein the Y-axis portion is driven by one end of the X-axis portion in the Y-axis direction; Braking means for restricting movement, position detecting means for detecting a position of one end of the X-axis part, and a target position of the X-axis part and a position of the one end of the X-axis part corresponding to a target position detected by the position detecting means. A control unit that drives the driving unit so as to approach the position, and applies the braking unit to apply a brake to the other end of the X-axis unit at a timing when it is detected that the one end of the X-axis unit approaches the target position. X-axis on the driven side where positioning settling tends to be delayed And the other end can be quickly settled by a braking means.

According to a second aspect of the present invention, in the electronic component mounting apparatus according to the first aspect, the driving means and the braking means comprise:
A pair of first and second stators arranged in parallel along the Y-axis direction, and a first mover supporting one end of the X-axis portion and movable along the first stator. , A second mover that supports the other end of the X-axis portion and is movable along the second stator. The position detector is a first mover on the first stator. And controlling the control unit to drive the first mover closer to the target position in accordance with the target position of the X-axis unit and the detection position of the position detecting means. The second movable element is energized at the timing when it is detected that the movable element has approached the target position, and the other end of the X-axis portion is braked. Can be quickly settled by the second mover.

According to a third aspect of the present invention, in the electronic component mounting apparatus according to the second aspect, the first and second stators have first and second stators.
The second X-axis portion is provided, the first of the first movable element movable along the stator provided on one end of the first X-axis section, the second to the other end of the first X-axis section A second mover movable along the second stator is provided, and a third mover movable along the second stator is provided at one end of the second X-axis portion. A fourth mover movable along the first stator is provided at the other end of the shaft portion, and the first and second movers on the first and second stators are provided.
First and second position detecting means for detecting a position of a third movable element are provided, and the first movable element is driven so that one end of the first X-axis portion approaches a target position, and At the timing when it is detected that one end of the X-axis portion has approached the target position, the second mover is energized to apply braking to the other end of the first X-axis portion, and the second X-axis portion The third mover is driven so that one end of the second X-axis portion approaches the target position, and at the timing when it is detected that one end of the second X-axis portion approaches the target position,
A control unit for energizing the fourth mover to apply a brake to the other end of the second X-axis unit is provided. In an apparatus configuration including two X-axis units, positioning settling tends to be delayed. The other end of the driven X-axis portion can be quickly settled by the second and fourth movers.

According to a fourth aspect of the present invention, in the electronic component mounting apparatus according to the second or third aspect,
The first stator and the mover movable along the first stator and the second stator and the mover movable along the same are each configured by a linear motor, and both ends of the X-axis portion are reliably supported. Since the motor load does not change depending on the position of the X-axis portion in the Y-axis direction, the head portion can be driven stably, and stable positioning accuracy can be secured. In an apparatus configuration having two X-axis units, each drive side is connected to the first stator and the second stator.
The wiring is not concentrated on the driving side.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a schematic overall configuration of a drive unit of an electronic component mounting apparatus according to an embodiment of the present invention, and FIG. 2 is a plan view of the same.

In FIG. 1 and FIG. 2, each of the two heads 1 has a plurality of nozzles 2 to which electronic components can be attached by suction using vacuum pressure or the like, and is attached to the X-axis parts 3A, 3B. And can be moved in the X-axis direction by driving means provided on the X-axis portions 3A and 3B. The X-axis portions 3A and 3B are supported by the Y-axis portion 4 at both ends, respectively, and are movable in a Y-axis direction perpendicular to the X-axis direction.

The Y-axis portions 4 are spaced apart from each other and
A pair of guide bases 5A, 5 arranged along the axial direction
B and the guide base 5A, stator 6A arranged in a row in each of 5B, 6B and stator 6A, the guide rails 7A arranged in upper and lower along the respective 6B, 7B
A table 8A carrying one end of the X-axis portion 3A and movably supported by a guide rail 7A; a table 8B carrying the other end of the X-axis portion 3A and movably supported by a guide rail 7B; Guide rail 7B which carries one end of shaft portion 3B
A table 8C movably supported on the table, a table 8D carrying the other end of the X-axis section 3B and movably supported on the guide rail 7A, and a coil section 9A provided on the tables 8A, 8B, 8C, 8D. , 9B, 9C, and 9D.

The stator 6A and the coil 9
A, the stator 6A and the coil section 9D, the stator 6B and the coil section 9B, and the stator 6B and the coil section 9C respectively constitute linear motors, and linear motors (6A, 9A; 6B) related to the tables 8A and 8C. , 9C) are linear motors (6B, 9B; 6A, 9B) on the drive side and tables 8B, 8D.
D) is set as the driven side.

The Y-axis portion 4 is provided on the guide bases 5A, 5B along the arrangement direction of the stators 6A, 6B as position detecting means for detecting the positions of the tables 8A, 8C on the stators 6A, 6B. Position detection scale 10A,
10B and tables 8A and 8C relating to the X-axis parts 3A and 3B.
And position sensors 11A and 11C for detecting the current position from the position detection scales 10A and 10B. The tables 8A and 8B correspond to target positions of the X-axis units 3A and 3B and detection positions of the position detection means. 8B, 8C, 8
The control unit 12 independently controls the driving of the linear motor according to D.

The position detecting scales 10A and 10B are composed of origin position markers and position detecting markers such as slits arranged at equal intervals, and the position sensors 11A and 11C are used when moving with the tables 8A and 8C. The position is detected by counting the position detection marker from the origin position marker.

The operation of the electronic component mounting apparatus having the above configuration will be described below. Since the operations of the two head units 1 are similarly controlled, the head unit 1 of one X-axis unit 3A will be described as a representative. It is the control unit 12 that performs the operation control.

As shown in FIG. 3, when the positioning operation of the head unit 1 in the Y-axis direction is started, first, the table 8A
The return to the origin. Then, in S1, the excitation of the linear motor on the driving side is turned on, and the excitation of the linear motor on the driven side is turned off. This excitation ON / OFF is controlled by the stator 6
This is because the power of the coil unit 9A of the table 8A is turned on and off while the powers of A and 6B are always on.

Next, in step S2, the operation of the table 8A on the driving side is commanded to control the current value of the coil 9A, so that the table 8A is started to move to the target position while being guided by the guide rail 7A. The acceleration is performed in step S4. When the maximum speed is reached in S4, the speed is reduced in step S5. During this time, the table 8B is not energized and the X-axis portion 3A
It will move along with.

At this time, the position of the drive-side table 8A on the stator 6A is detected by the position detection scale 10A and the sensor 11A, and the difference between the detected position and the target position is calculated. It is determined whether or not the position deviation from the target position is smaller than the preset amount a.
If the position deviation is greater than or equal to the set amount a, the speed is further reduced.

When the position deviation becomes smaller than the set amount a,
In S7, while the power supply of the coil unit 9A on the driving side is turned off, the power supply of the coil unit 9B on the driven side is turned on and the table 8 is turned off.
Braking B. When the positional deviation of the drive-side table 8A from the target position becomes smaller than the set amount b (<a) in S8, the current in the coil 9B is increased in S9 to apply a strong brake to the table 8B.

By doing so, in step S10, the drive-side table 8A (therefore, one end of the X-axis portion 3A) is positioned at the target position, and when the positioning is completed, the driven-side table 8B (therefore, the X-axis portion 3A). ) Can be completed almost simultaneously with almost no overshoot.

After the tables 8A and 8B are stopped, the tip of the nozzle 2 of the head unit 1 is positioned, and the suction (or mounting) operation is performed. After that, in S11, the positioning operation of the head unit 1 in the Y-axis direction to the next target position is started.

As described above, with respect to the X-axis portions 3A and 3B, the table 8 on the driven side where positioning settling tends to be delayed.
B, 8D can be settled quickly, so that the X-axis parts 3A, 3B
Can be quickly and accurately positioned, and the production efficiency can be improved more than before.

Further, X-axis unit 3A, since the ends of 3B was a linear motor arrangement, it is possible to reliably support the X-axis unit 3A, and 3B at both ends, X-axis unit 3A, 3B in the Y
Since the motor load does not change depending on the axial position, each head 1 can be driven stably, and stable positioning accuracy can be secured. In addition, since the tables 8A and 8C on the driving side are distributed to the stators 6A and 6B, the wiring does not concentrate on one of the stators 6A and 6B.

It should be noted that not only when a single X-axis portion is provided, but also when separate driving means and braking means are used in place of the linear motor, driving and braking are performed in the same manner as described above. Can be settled quickly.
When two or more X-axis parts are provided as described above, control is performed so that the X-axis parts do not interfere with each other.

In the above description, the current position of the position sensors 11A and 11C (therefore, the tables 8A and 8C) is detected by detecting the origin position markers and the position detection markers on the position detection scales 10A and 10B.
Position sensors 11A, 10A,
It is also possible to assemble the device using other position detecting means such as an absolute encoder configured to detect the absolute position of 11C.

[0028]

As described above, according to the present invention, the driving means and the braking means are provided at one end and the other end of the X-axis section for attaching and moving the mounting head section in the Y-axis direction. Is provided, and when the one end of the X-axis unit approaches the target position, the timing is adjusted and the other end of the X-axis unit is braked by the braking unit.
The positioning settling time of the mounting head can be shortened as compared with the related art, and high productivity can be realized especially when mounting various kinds of electronic components.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic overall configuration of a driving unit of an electronic component mounting apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view of the electronic component mounting apparatus.

FIG. 3 is a flowchart showing the operation timing of the electronic component mounting apparatus.

FIG. 4 is a plan view showing a schematic overall configuration of a conventional drive-type electronic component mounting apparatus.

[Explanation of symbols]

 1 Head 2 Nozzle 3A, 3B X-axis 4 Y-axis 6A, 6B Stator 8A, 8C Table 9A, 9C Coil 8B, 8D Table 9B, 9D Coil 10A, 10B Position detection scale 11A, 11C Position sensor 12 Control unit

Of the front page Continued (72) inventor Kakita Nobuyuki Osaka Prefecture Kadoma Oaza Kadoma 1006 address Matsushita Electric Industrial Co., Ltd. in the (72) inventor Hachimura Tetsutaro Osaka Prefecture Kadoma Oaza Kadoma 1006 address Matsushita Electric Industrial Co., Ltd. in the F-term ( Reference) 3C007 AS08 AS24 BS04 BT12 CV04 CW04 CY11 DS06 FS01 FT01 FU01 HS04 HS26 KS03 KS36 KV12 KW06 LV04 MT04 NS17 5E313 AA01 EE01 EE02 EE03 EE24 EE25 FF24 FF28

Claims (4)

[Claims] 1. An electronic device comprising: an X-axis unit that drives a mounting head unit capable of holding a component to be mounted in the X-axis direction; and a Y-axis unit that supports both ends of the X-axis unit and drives in the Y-axis direction. A component mounting apparatus, comprising: a driving unit that drives the Y-axis unit at one end of the X-axis unit in the Y-axis direction; and a braking unit that controls movement of the other end of the X-axis unit in the Y-axis direction. Position detecting means for detecting the position of one end of the X-axis part, and the driving means such that the one end of the X-axis part approaches the target position in accordance with the target position of the X-axis part and the detection position of the position detecting means. And a control unit for applying a brake to the other end of the X-axis unit at a timing when it is detected that the one end of the X-axis unit approaches the target position. apparatus. 2. A pair of first and second stators arranged in parallel along the Y-axis direction with a driving unit and a braking unit,
A first mover supporting one end of the X-axis portion and movable along the first stator; and a second movable member supporting the other end of the X-axis portion and movable along the second stator. And a position detecting means configured to detect a position of the first mover on the first stator, and a control unit includes a target position of the X-axis unit and the position. The first mover is driven to approach the target position in accordance with the detection position of the detecting means, and the second mover is energized at a timing when it is detected that the first mover approaches the target position. 2. The electronic component mounting apparatus according to claim 1, wherein the other end of the X-axis portion is braked. 3. The first and second stators have first and second stators.
Is provided, a first mover movable along a first stator is provided at one end of the first X-axis portion, and a second fixed member is provided at the other end of the first X-axis portion. A second mover movable along the stator; a third mover movable along the second stator at one end of the second X-axis portion; a second X-axis portion; A fourth mover movable along a first stator is provided at the other end of the first and third stators on the first and second stators.
First and second position detecting means for detecting the position of the mover, and driving the first mover so that one end of the first X-axis portion approaches a target position, At the timing when it is detected that one end of the section has approached the target position, the second
Is energized to apply braking to the other end of the first X-axis portion, and drives the third mover so that one end of the second X-axis portion approaches the target position. 3. A control unit for applying a current to the fourth movable element and braking the other end of the second X-axis unit at a timing when it is detected that one end of the X-axis unit approaches the target position. Electronic component mounting equipment. 4. The linear motor according to claim 2, wherein each of the first stator and the movable element movable along the first stator and the second stator and the movable element movable along the second stator are respectively constituted by linear motors. Electronic component mounting apparatus according to any one of the above.