JP3184371B2 - Single plate type XY table device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an XY table device used for general production equipment which requires plane movement in the XY direction, and particularly to an automatic insertion device or an automatic mounting device for electronic parts and the like. The present invention relates to a single-plate type XY table device for holding a printed circuit board and the like so as to be movable back and forth and left and right.

[0002]

2. Description of the Related Art Conventionally, as an XY table device used to hold a printed circuit board so as to be able to move back and forth and left and right in an automatic insertion device and an automatic mounting device of an electronic part, Japanese Utility Model Application Laid-Open No. Such a configuration is known. In this conventional XY table device, a Y-axis direction table is slidably supported by a Y-axis direction guide rail fixed in parallel on a base, and fixed in parallel to each other on the Y-axis direction table. The X-axis direction guide rail slidably supports the X-axis direction table (work table), and the Y-axis direction table is moved along the Y-axis direction guide rail by the Y-axis direction helical shaft, thereby moving the X-axis direction table. In this configuration, the helical shaft is moved along the X-axis guide rail.

[0003]

By the way, in the above-mentioned conventional example, an X-axis direction table, an X-axis drive source (servo motor, etc.) for driving the X-axis direction table, and an X-axis Drive transmission unit (X-axis helical axis, etc.)
Are arranged, and each table is moved in the Y-axis direction and the X-axis direction, so that two tables are overlapped. Therefore, there is a disadvantage that the weight becomes large as a whole. In particular, the Y-axis direction table needs to have sufficient strength to support the X-axis direction table, the X-axis drive source, and the X-axis transmission unit, and it can be said that it is difficult to reduce the weight of the Y-axis direction table. . Therefore, since the weight is large, X
It was difficult to speed up the movement of the axial direction table and the Y-axis direction table, which hindered the speeding up of the insertion and mounting of electronic components and the like. Further, since the two tables are superposed, there is a problem in that bending and distortion are likely to occur due to the structure, and there is a problem that vibration generated when each table moves is increased, and accuracy may be reduced.

In view of the above, the present invention has a structure in which a work table on which a printed circuit board or the like is placed is directly driven in the X-Y directions, and only one work table is used to reduce the weight. It is an object of the present invention to provide a single-plate type XY table device that realizes a significant speed-up of a planar movement in a direction and reduces vibration and improves accuracy.

[0005]

In order to achieve the above object, a single plate type XY table apparatus of the present invention comprises a Y-axis work table guide fixed to a base, and a Y-axis work table guide. An orthogonal guide block slidably supported in the Y-axis direction by a table guide portion, and an X-axis work table slidably supported in the X-axis direction orthogonal to the Y-axis direction by the orthogonal guide block. A guide portion, a work table to which the X-axis direction work table guide portion is fixed, an X-axis direction secondary guide portion and a Y-axis direction secondary guide portion provided on the work table, an X-axis drive source and an X-axis An X-axis direction moving body driven in the X-axis direction by a drive transmission unit, a first roller pivotally attached to the X-axis direction moving body and engaging with the Y-axis direction secondary guide, Drive source and Y-axis drive transmission unit And a second roller that is pivotally attached to the Y-axis direction moving body and is engaged with the X-axis direction secondary guide section. I have.

Further, the X-axis direction secondary guide portion and the Y-axis
A linear scale is provided on each of the axial secondary guides,
And by providing a measuring unit that reads the linear scale on the X-axis direction moving body and the Y-axis direction moving body,
You may comprise a linear scale sensor of an X-axis direction and a Y-axis direction, respectively.

Further, the X-axis drive source and the X-axis drive transmission unit are arranged between the X-axis direction work table guide and the extension thereof, and the Y-axis drive table and the Y-axis drive transmission unit are arranged between the Y-axis direction work table guide and the extension. It is good also as a structure which arranges a shaft drive source and a Y-axis drive transmission part.

[0008]

In the single-plate type XY table apparatus of the present invention, the X-axis drive source and the X-axis drive transmission unit allow the X-axis table to be driven.
An axial moving body is driven, a Y-axis moving body is driven by a Y-axis driving source and a Y-axis driving transmitting unit, and an X-axis secondary guiding unit and a Y-axial secondary guiding unit provided on a work table, respectively. By transmitting the driving force in each axis direction, the XY movement is performed with one table, so that the weight is about half as compared with the conventional configuration in which two tables are stacked. It can be lighter. Therefore, the speed of movement of the work table can be increased, the deflection and the distortion can be reduced, and the vibration can be reduced.

A linear scale section is provided on each of the X-axis direction secondary guide section and the Y-axis direction secondary guide section, and the measurement section reads the linear scale section on each of the X-axis direction moving body and the Y-axis direction moving body. When the linear scale sensor is configured with each sensor, the amount of movement of the work table in each axis direction can be detected with high accuracy, and the position of the work table is controlled based on the detection, thus controlling by a completely closed loop. It can be realized, and the work table can be positioned with high accuracy.

An X-axis drive source and an X-axis drive transmission unit are arranged between the pair of X-axis work table guides and the extension line, and the pair of Y-axis work table guides and the extension line When the Y-axis drive source and the Y-axis drive transmission unit are disposed in the X-axis or Y-axis direction work table guide unit, the distance from the drive source in each axis direction to the work working position becomes small, so that the X-axis or Y-axis An XY table suitable for high-speed operation of a work table because vibration expansion and compounding at the work working position can be made smaller than when a Y-axis drive source and a drive transmission unit are arranged, and vibration is less likely to occur. A device is obtained.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a single plate type X- according to the present invention will be described.
An embodiment of a Y table device will be described with reference to the drawings.

1 to 7 show an embodiment of a single plate type XY table device according to the present invention. In these figures, a pair of Y-axis direction work table guides 2A and 2B are attached and fixed on a base 1 in parallel at a predetermined interval. That is, the Y-axis direction work table guides 2A, 2B are mounted on the fixed blocks 21A, 21B fixed on the base 1 on the Y-axis direction guide rails 22A, 22B.
22B are integrally fixed. Also, Y
A Y-axis direction movable body guide rail 23 is fixed to the inner side surface of the axial direction guide rail 22A along the Y-axis direction.

A pair of Y-axis direction work table guides 2
A pair of orthogonal guide blocks 3 are supported on A and 2B slidably in the Y-axis direction. Each of the orthogonal guide blocks 3 has a Y-axis guide groove 24 slidably engaged with the Y-axis guide rails 22A and 22B on the bottom surface, and an X-axis guide rail on the upper surface orthogonal to the Y-axis direction. An X-axis direction guide groove 25 slidably engaged with 5A, 5B (fixed to the work table 4 side as an X-axis direction work table guide portion) is formed, respectively.

The upper surface of the work table 4 serves as a substrate mounting surface 30 for holding a printed circuit board or the like, and the Y-axis direction guide rails 22A, 22B are provided on both sides of the bottom surface of the work table 4.
X-axis direction guide rails 5A and 5B serving as X-axis direction work table guides orthogonal to 22B are fixed in parallel. In addition, linear bar-shaped (long rectangular parallelepiped) X-axis direction secondary guides 15A and 15B are integrally formed or fixed to both end surfaces parallel to the X-axis direction of the work table 4, respectively. Notches 26 are formed on both sides of the work table 4 parallel to the Y-axis direction, and a linear bar-shaped (long rectangular parallelepiped) Y-axis direction secondary guide portion extends across the inside of the notch 26 in the Y-axis direction. 16A and 16B are fixed integrally. Then, on the four orthogonal guide blocks 3,
The work table 4 is mounted, and the X-axis guide rails 5A and 5B fixed to the work table 4 are slidably engaged in the X-axis direction guide grooves 25 of the orthogonal guide block 3 in the X-axis direction. ing. As a result, work table 4
Are movable in the X-Y direction (front-rear, left-right) with respect to the Y-axis direction work table guides 2A, 2B by four orthogonal guide blocks 3.

The work table 4 is provided on the base 1 between the X-axis direction guide rails 5A and 5B as a pair of X-axis direction work table guides and an extension thereof.
X-axis moving body 6 for moving X in the X-axis direction, and an X-axis driving source 8 for driving the X-axis moving body 6 in the X-axis direction.
And the X-axis drive transmission section 9 are provided in parallel with the X-axis direction, and the work table 4 is provided between a pair of Y-axis direction work table guide sections 2A and 2B and an extension thereof.
A Y-axis direction moving body 11 for moving the object in the Y-axis direction;
A Y-axis drive source 12 and a Y-axis drive transmission unit 13 for driving the Y-axis direction moving body 11 in the Y-axis direction are provided in parallel with the Y-axis direction.

The X-axis direction moving body 6 comprises an X-axis direction moving bar 31 and a ball screw nut 32 fixedly attached to one end thereof. A pair of first grooved rollers 17 having grooves engaging with the thicknesses of the Y-axis direction secondary guides 16A and 16B are pivotally mounted one by one. That is, the pair of first grooved rollers 17 sandwich the Y-axis direction secondary guides 16A and 16B without play.

The X-axis drive transmission unit 9 includes a ball screw shaft 9A.
The ball screw shaft 9A is pivotally supported by a bearing 33 having a front end fixed on the base 1, and is rotationally driven by the X-axis drive source 8 connected to a rear end. .
Then, the ball screw nut 32 of the X-axis direction moving body 6
And the ball screw shaft 9A are screwed together, and the X-axis direction moving body 6 is driven in the X-axis direction as the ball screw shaft 9A rotates. The X-axis drive source 8
Is constituted by an AC servomotor or the like, and is fixed on the base 1.

The Y-axis direction moving body 11 includes a Y-axis direction slider 34, roller mounting members 35A and 35B fixedly integrated at both ends thereof, and a ball screw nut fixed to the Y-axis direction slider 34. A second grooved roller 18 having a groove that engages with the thickness of the X-axis direction secondary guides 15A and 15B is pivotally mounted on the upper surfaces of the roller mounting members 35A and 35B, respectively. Then, one of the second grooved rollers 18 hits the X-axis direction secondary guide portion 15A, and the other second grooved roller 18 hits the X-axis direction secondary guide portion 15B. I do.

Further, a guide groove 38 is formed in the Y-axis direction on the side surface of the Y-axis direction movable body 11 (Y-axis direction slider 34) facing the Y-axis direction work table guide portion 2A. Is the Y-axis direction work table guide 2
A slidably engages with the Y-axis direction movable body guide rail 23 provided on the side surface of A. Y-axis drive transmission unit 1
Numeral 3 has a ball screw shaft 13A. The ball screw shaft 13A is pivotally supported by a bearing 37 having a front end fixed on the base 1 and connected to a rear end of the Y-axis drive source. 12 is driven to rotate. Then, the ball screw nut 36 of the Y-axis direction moving body 11 and the ball screw shaft 13
A is screwed together with the A, and the Y-axis direction moving body 11 is driven in the Y-axis direction with the rotation of the ball screw shaft 13A. The Y-axis drive source 12 is constituted by an AC servomotor or the like, and is fixed on the base 1.

The secondary guides 15A and 15B in the X-axis direction of the work table 4 are brought into contact with the pair of second grooved rollers 18 of the Y-axis moving body 11 without backlash, so that the second guides 15A and 15B in the Y-axis direction are moved. It follows the movement of the moving body 11 in the Y-axis direction, but is slidable in the X-axis direction, and the Y-axis direction secondary guides 16A and 16B connect the pair of both ends of the X-axis direction moving body 6 to each other. The X-axis direction moving body 6 follows the movement of the X-axis direction moving body 6 in the X-axis direction while being held between the formed first grooved rollers 17 without play, but is slidable in the Y-axis direction.

An X-axis direction linear scale portion (for example, an optical scale) 19A is fixed to a long end surface (an end surface facing the roller mounting member 35A) of the X-axis direction secondary guide portion 15A along the X-axis direction. The linear scale portion 19A is provided on the roller mounting member 35A of the Y-axis direction moving body 11.
Is fixed, and constitutes a linear scale sensor for detecting the movement amount and position of the work table 4 in the X-axis direction.

The Y-axis direction secondary guide 16A has a Y
A linear scale portion (for example, an optical scale) 19B in the Y-axis direction is fixed to the long outer end face along the axial direction, and the Y-axis direction linear bar is fixed on the X-axis direction moving bar 31 of the X-axis direction moving body 6. A measurement unit 20B such as an optical system for reading the scale unit 19B is fixed, and the work table 4 in the Y-axis direction is fixed.
A linear scale sensor for detecting the moving amount and the position of the linear scale.

In the configuration of the above embodiment, the work table 4 is moved by the X-axis drive source 8 according to the control program.
Alternatively, the control is performed by controlling the Y-axis drive source 12 and rotating the ball screw shaft 9A of the X-axis drive transmission unit 9 or the ball screw shaft 13A of the Y-axis drive transmission unit 13. That is, the movement of the work table 4 in the X-axis direction is performed by rotating the ball screw shaft 9A of the X-axis drive transmission unit 9 by the X-axis drive source 8, and the ball screw nut 32 screwed with the ball screw shaft 9A. To move the X-axis direction moving body 6
In the axial direction, an operating force is applied vertically to the Y-axis secondary guides 16A and 16B engaged with the first grooved roller 17, and with the movement of the X-axis movable body 6, The X-axis direction guide rails 5A and 5B on the bottom of the worktable 4 are Y
This is performed by sliding along the X-axis direction guide groove 25 of the orthogonal guide block 3 on the axial direction work table guides 2A and 2B.

The movement of the work table 4 in the Y-axis direction is as follows.
The ball screw shaft 13A of the Y-axis drive transmission unit 13 is rotated by the Y-axis drive source 12, and the ball screw nut 36 screwed with the ball screw shaft 13A is moved to move the Y-axis direction moving body 11 in the Y-axis direction. In the X-axis direction and the X-axis direction secondary guides 15A, 15 engaged with the second grooved roller 18.
An operating force is applied vertically to B, and the Y-axis direction moving body 11 is applied.
Y-axis direction work table guides 2A, 2
This is performed by the orthogonal guide block 3 on B sliding along the Y-axis direction guide rails 22A and 22B. The movement of the work table 4 in the X-axis direction or the Y-axis direction can be performed simultaneously.

At this time, as the work table 4 moves in the X-axis direction or the Y-axis direction, the X-axis direction secondary guide portion 15A
And the linear scale sections 19A and 19B provided on the secondary guide section 16A in the Y-axis direction are read by the measurement sections 20A and 20B, and the movement amounts in the X-axis direction and the Y-axis direction, and further, the positions in the X-axis direction and the Y-axis direction. Detected. Then, the X-axis drive source 8 and the Y-axis drive source 1
2 to control the position of the work table 4 in the X-axis direction and the Y-axis direction. In this case, the position control of a completely closed loop by a linear scale sensor can be realized instead of the semi-closed loop by a servo motor which is normally performed, and highly accurate positioning is possible.

FIGS. 3 to 7 show the range of movement of the work table 4 in the X-axis direction or the Y-axis direction controlled by the linear scale sensor including the linear scale units 19A and 19B and the measurement units 20A and 20B. .
In these figures, the substrate mounting surface 3 of the work table 4 is shown.
The inside of the rectangular frame 10 (two-dot chain line) 10 is brought directly below the work table 4 by moving in the X-axis direction and the Y-axis direction with respect to the work work position P located at the center of the work table 4 in FIG. It is the area where you can do.

As shown in FIG. 3, when the center of the work table 4 coincides with the work position P, it is assumed that both the X-axis direction and the Y-axis direction of the work table 4 are at the origin.

FIG. 4 shows a case where the amount of movement of the work table 4 in the X-axis direction is a negative limit, and the amount of movement of the work table 4 in the Y-axis direction is a positive limit.

FIG. 5 shows a case where the amount of movement of the work table 4 in the X-axis direction is a negative limit and the amount of movement of the work table 4 in the Y-axis direction is a negative limit.

FIG. 6 shows a case where the movement amount of the work table 4 in the X-axis direction is the positive limit and the movement amount of the work table 4 in the Y-axis direction is the positive limit.

FIG. 7 shows a case where the movement amount of the work table 4 in the X-axis direction is a positive limit, and the movement amount of the work table 4 in the Y-axis direction is a negative limit.

As shown in FIGS. 3 to 7, the work working position P is always between the X-axis guide rails 5A and 5B as the X-axis work table guide, and the Y-axis work table It is located between the guides 2A and 2B. Moreover, the work working position P is located closest to the X-axis drive source 8 and the X-axis drive transmission unit 9 and the Y-axis drive source 12 and the Y-axis drive transmission unit 13, and the vibration during the operation of the drive source is enlarged. And a combination of vibration and vibration can be reduced.

The configuration of the above embodiment has the following features. (1) The work table 4 has a secondary guide 15 in the X-axis direction.
A, 15B and Y-axis direction secondary guides 16A, 16B are provided, and the driving force in each axis direction is transmitted to them, so that the XY movement of the work table 4 can be performed with one table. Therefore, the weight can be reduced to about half the weight as compared with the conventional configuration in which two tables are stacked. Therefore, the speed of movement of the work table 4 can be increased, the deflection and the distortion can be reduced, and the vibration can be reduced. (2) When operating the XY table device at high speed,
Vibration of the work table 4 becomes a problem, and the larger the distance from the drive source in each axial direction to the work position, the more likely it is for the vibration to be enlarged or combined at the work position. The X-axis direction guide rails 5A and 5B serving as the X-axis direction work table guide section and the X-axis drive source 8 and the X-axis drive transmission section 9 are arranged between the extension lines, and the Y-axis direction work table guide section 2 is provided.
A, 2B and the Y-axis drive source 12 and Y
Since the shaft drive transmission unit 13 is arranged, the distance from the drive source in each axial direction to the work position P is small, and the vibration is not enlarged or complex at the work position, and the vibration is generated. Hard to do. (3) Each axis direction of the work table 4 using a linear scale sensor that reads the linear scale sections 19A and 19B provided on the X-axis direction secondary guide section 15A and the Y-axis direction secondary guide section 16A with the measuring sections 20A and 20B. Since the movement amount and position of the work table 4 are detected with high accuracy and the position of the work table 4 is controlled based on the detection, the work table 4 can be positioned with high accuracy by a completely closed loop.

Although the embodiments of the present invention have been described above, it is obvious to those skilled in the art that the present invention is not limited to the embodiments and various modifications and changes can be made within the scope of the claims. Would.

[0035]

As described above, according to the single plate type XY table apparatus of the present invention, the work table is provided with the X-axis secondary guide and the Y-axis secondary guide, and By transmitting the driving force in the axial direction, the XY movement of the work table can be performed with a single table, so that the work table can be moved about half as compared with the conventional configuration in which two tables are stacked. It can be reduced in weight. Therefore, the speed of movement of the work table can be increased, the deflection and the distortion can be reduced, and the vibration can be reduced. Therefore, it is possible to realize a single plate type XY table device which is high-speed, high-precision, low-vibration, and most suitable for an automatic insertion device or an automatic mounting device for electronic components and the like.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a single plate type XY table device according to the present invention.

FIG. 2 is a front sectional view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a plan view showing a case in which the moving amount of the work table is a limit on the negative side in the X-axis direction and a limit on the positive side in the Y-axis direction in the embodiment.

FIG. 5 is a plan view showing a case where the movement amount of the work table is a limit on the negative side in the X-axis direction and a limit on the negative side in the Y-axis direction in the embodiment.

FIG. 6 is a plan view showing a case where the movement amount of the work table is a positive limit in the X-axis direction and a positive limit in the Y-axis direction in the embodiment.

FIG. 7 is a plan view showing a case where the movement amount of the work table is a limit on the positive side in the X-axis direction and a limit on the negative side in the Y-axis direction in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2A, 2B Y-axis direction work table guide part 3 Orthogonal guide block 4 Work table 5A, 5B X-axis direction guide rail 6 X-axis direction moving body 8 X-axis drive source 9 X-axis drive transmission part 11 Y-axis direction Moving body 12 Y-axis drive source 13 Y-axis drive transmission section 15A, 15B X-axis secondary guide section 16A, 16B Y-axis secondary guide section 17 First grooved roller 18 Second grooved roller 19A, 19B Linear scale Section 20A, 20B Measurement section

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-57-24595 (JP, A) JP-A-1-2722041 (JP, A) JP-A-1-314993 (JP, A) JP-A-2- 202000 (JP, A) JP-A 1-179298 (JP, U) JP-A 53-59784 (JP, U) JP 1-71053 (JP, U) JP-A 59-99472 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H05K 13/04

Claims (3)

(57) [Claims] A Y-axis direction work table guide fixed to a base; and a Y-axis direction work table guide.
An orthogonal guide block slidably supported in the axial direction, an X-axis work table guide slidably supported by the orthogonal guide block in an X-axis direction orthogonal to the Y-axis direction, A work table to which an X-axis direction work table guide section is fixed, an X-axis direction secondary guide section and a Y-axis direction secondary guide section provided on the work table, and an X-axis drive source and an X-axis drive transmission section. An X-axis moving body driven in the axial direction, a first roller pivotally attached to the X-axis moving body and engaging with the Y-axis secondary guide portion;
A Y-axis moving body driven in the Y-axis direction by a Y-axis driving source and a Y-axis driving transmitting unit, and pivotally attached to the Y-axis moving body to engage with the X-axis secondary guide unit A single plate type XY table device comprising: a second roller. 2. A linear scale section is provided on each of the X-axis direction secondary guide section and the Y-axis direction secondary guide section,
And a measuring unit for reading the linear scale is provided on the X-axis direction moving body and the Y-axis direction moving body.
2. The single-plate type XY according to claim 1, wherein a linear scale sensor in the axial direction and a linear scale sensor in the Y-axis direction are configured.
Table equipment. 3. The X-axis drive source and the X-axis drive transmission unit are disposed between the X-axis direction work table guide and an extension thereof, and the Y-axis drive table and the Y-axis drive transmission unit are arranged between the Y-axis work table guide and the extension. The single-plate type XY table device according to claim 1, wherein an axis drive source and a Y-axis drive transmission unit are arranged.