JPH0347974B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a moving table drive mechanism used for automatic processing and assembly inspection of workpieces, and in particular to a moving table drive mechanism that can drive the moving table at high speed and reduce costs. This is what I did.

BACKGROUND TECHNOLOGY AND PROBLEMS In industry, moving tables are used, for example, for assembling equipment, machining parts, measuring, and the like. The commonly used moving tables are:
This is called an XY table. FIG. 1 shows an example of this XY table. As shown in FIG. 1, the XY table is constructed by stacking a base 1, a lower table 2, and an upper table 3. Specifically, there are two guide rails 4 on the base 1,
5 and a feed screw 6 are attached in parallel. On the other hand, the lower part of the lower table 2 is attached to these guide rails 4, 5 and the feed screw 6 so as to form a pair. In this case, the rotational force of the motor 7 is transmitted to the feed screw 6 via the reducer 8 .
Therefore, the feed screw 6 rotates based on the rotation of the motor 7, and the lower table 2 reciprocates in the direction shown by the arrow X in response. lower table 2
There are also two guide rails 9, 10 and feed screw 1.
1 are installed in parallel. These rails 9, 10 and feed screw 11 are arranged perpendicular to the directions of the rails 4, 5 and feed screw 6 described above. The rotational force from another motor 12 is transmitted to the feed screw 11 via a reducer 13, and in this case as well, the upper table 3 is configured to reciprocate based on the rotation of the motor 12. However, the direction of the reciprocating motion is the direction shown by arrow Y.

In such an XY table, motors 7 and 12
It will be easily understood that the upper table 3 can be moved arbitrarily on a predetermined plane by driving. When processing a workpiece, etc., the workpiece may be placed on the upper table 3, and the controller may be used to control the upper table 3 so as to sequentially position the upper table 3 at desired coordinates. In the controller, corresponding to the coordinates,
This can be easily done by programming how much the motors 7 and 12 should be rotated. If necessary, a control signal may be supplied from the controller to the machining tool to move the tool up and down, for example. By using the XY table in this way, equipment can be assembled in sequence.

Incidentally, recently there has been a demand for moving such an XY table at high speed. This is because if the XY table can be driven at high speed, equipment can be assembled in a short time. However, the first
In the XY table shown in the figure, since the upper table 3 and lower table 2 are moved by a pair of screws, there is a limit to increasing the moving speed even if the motor is rotated at high speed. Moreover, the lower table 2 is placed on the base 1.
Since the structure is such that the upper tables 3 and 3 are stacked one after another, the rigidity of the lower table 2 and the upper table 3 must be increased, and therefore their weight must be increased. For this reason, the reactance component of the vibration system becomes large and has a slow rise, and it takes a long time to stabilize, making high-speed movement impossible.

In addition, the above-mentioned XY table has a stacked structure as described above, and requires feed screws, etc., which makes the structure complicated and increases costs.

OBJECTS OF THE INVENTION The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a moving table drive mechanism that can drive a moving table at high speed and reduce costs.

SUMMARY OF THE INVENTION In the present invention, two guide rails are provided to intersect with each other, and the movable table can reciprocate in the longitudinal direction of both guide rails by engaging with these guide rails. Each of the guide rails is made to be able to move in parallel, so that when one guide rail moves in parallel, the moving table moves along the other guide rail.

According to the moving table drive mechanism of the present invention, unlike conventional XY tables and the like, a stacking structure is not adopted, so that weight reduction and structure simplification can be achieved. Therefore, the movable table can be driven at high speed, and costs can be reduced.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to FIG. 2 and subsequent drawings.

In FIGS. 2 and 3, 21 indicates a frame, on which a fixed table 22, motors 23, 24, reduction gears 25, 26, bearing boxes 27, 28, etc. are fixedly provided. The fixed table 22 has a square plate shape, and its upper surface is flat.

One motor 23 is connected to one side of the fixed table 22,
That is, it is provided near one side on the left side of FIG. A reduction gear 25 is connected to the upper part of the motor 23, and an X arm 29 is fixedly attached to a drive shaft 25a of the reduction gear 25. On the other hand, this motor 2
A bearing box 27 is provided in such a manner as to sandwich the fixed table 22 together with the bearing box 3. That is, the bearing box 27 is attached near one side on the right side in FIG. Another X-arm 30 is fixedly attached to the shaft 27a of this bearing box 27. An X guide rail 31 is attached to the tips of the above-mentioned X arm 29 and this X arm 30 so as to connect them.
The guide rail 31 and the X arms 29, 30 constitute a parallel link. In this case, when one X-arm 29 is driven by the rotation of the motor 23, the other X-arm 30 rotates accordingly, and the guide rail 31 moves in parallel in the vertical direction in FIG. It will be done.

Further, another motor 24 is provided near the other side of the fixed table 22, that is, the lower side in FIG. A speed reducer 2 is mounted on the top of this motor 24.
6 are connected to each other, and a Y arm 32 is provided fixed to the drive shaft 26a of this reducer 26. On the other hand,
A bearing box 28 is provided facing the motor 24.
Another Y arm 33 is provided fixed to the shaft 28a of No. 8. A Y guide rail 3 is provided at the tip of each of this Y arm 33 and the above-mentioned Y arm 32.
4 are connected. In this case, the rotation of the motor 24 causes the Y guide rail 34 to be translated in the left-right direction in FIG. There is no need to explain this.

The moving table 35 is also shaped like a square plate, for example. Guide rollers 36 to 4 are provided on the lower surface of the movable table 35, that is, the surface facing the fixed table 22.
3 is installed. These rollers 36-4
3 is rotatably mounted so as to rotate clockwise or counterclockwise in FIG. The moving table 35 has guide rollers 36 to 3.
9 along the X guide rail 31, and on the other hand, the other rollers 40 to 43 guide the rollers along the Y guide rail 34. As the material of this moving table 35, honeycomb core can be used. That is, the honeycomb core skin layer can be applied to form a plate-like structure as a whole. In this example, compressed air is jetted from the movable table 35 toward the fixed table 22,
On the contrary, it is designed to be able to suck air.

In addition, in this example, the auxiliary arms 44, 45, 46, 4
7 to drive shafts 25a, 26a and shafts 27a, 2, respectively.
I am trying to fix it to 8a. These installations are done using X arms 29 and 30, respectively.
and the Y arms 32 and 33 have an angular difference of 90°. And the auxiliary arm 44,
An auxiliary link 48 is connected to the tip of each of the auxiliary arms 46, and another auxiliary link 48 is connected between the other auxiliary arms 45 and 47.
9 are connected. Even when the X-arm 29 driven by the rotation of the motor 23 is at the dead center, the auxiliary arm 44 works effectively to reliably drive the moving table 35 in the vertical direction in FIG. 2 even in such a case. be able to. Y arm 32 driven based on the rotation of the other motor 24
In the case of the dead center, the auxiliary arm 45 functions effectively. There is no need to explain these matters.

In addition, in FIG. 3, 50, for example, a pulse generator is shown. That is, the rotation of the motor 23 can be counted. By counting the rotations of the motor 23, the angular position of the X arm 29 can be detected. 51 is a similar pulse generator for detecting the angular position of Y-arm 32.

FIG. 4 shows a case where a workpiece 52 is processed by a tool 53 using such a moving table drive mechanism. In such machining, a predetermined position of the work 52 is positioned exactly below the tool 53, and then the tool 53 is lowered toward the work 52, thereby machining the work 52. If there are a plurality of machining locations on the workpiece 52, the moving table 35 may be sequentially moved and the tool 53 may be driven each time.

When moving the workpiece 52 in the direction of the arrow X, the X guide rail 31 may be moved in parallel in the direction of the arrow X. That is, when the motor 23 (FIG. 2) is rotated forward or reverse, the X arm 29 (FIG. 2) swings by an amount corresponding to the number of rotations, thereby moving the X guide rail 31. In this case, the other guide rail 34 has the role of guiding the moving table 35. For example, when the moving table 35 is in the position shown in FIG. 5A, if the X guide rail 31 is moved to the right side in the figure, the moving table 35
5 moves to the right side of the figure using the Y guide rail 34 as a guide, and sequentially reaches the position shown in FIG. 5B and then the position shown in FIG. 5C. As a result, the moving table 35 is moved to a desired position in the direction of the arrow X.

Of course, the same applies to the case where the Y guide rail 34 is moved in parallel. In this case, it goes without saying that the X guide rail 31 functions as a guide.

Of course, in this example, in order to move the moving table 35 instantaneously, the motors 23 and 24 can be rotated at the same time by a desired number of rotations, and the moving table 35 can be simultaneously moved in the direction of the arrow X and the direction of the arrow Y. Of course, if you don't mind the travel time being a little longer, you can do it one by one.

By using such a moving table drive mechanism and controlling the driving parts of the moving table 35 and the tool 53 by a controller, desired processing can be performed automatically in sequence. In this case, the position of the movable table 35 can be detected by the pulse generators 50, 51 provided on the motors 23, 24, which can drive the movable table 35 to a predetermined position.

In this example, the movable table 35 uses honeycomb core as the material of the movable table 35.
The weight itself can be made extremely small. Moreover, as mentioned above, the compressed air is fixed on the table 22.
Since it can be ejected to the side, a slight positional deviation between the tool 53 and the workpiece 52 can be absorbed. That is, as shown in FIG. 6, a screw is used as the workpiece 52, and the tip of the tool 53 and the workpiece 52
Even if the engagement of the slots 52a is slightly deviated, the movable table 35 side will be slightly deviated, and flexibility can be increased.

Of course, when performing measurements, such movement of the moving table 35 is inconvenient. Therefore, in this case, air is sucked so that the movable table 35 remains immovable with respect to the fixed table 22. In this way, even if the moving table 35 is lightweight as described above, there will be no inconvenience.

Effects of the Invention As described above, in this invention, two guide rails are provided in an intersecting arrangement so that they can each be moved in parallel. When one side is moved in parallel, the moving table is moved along the other guide rail. Therefore, only a single moving table moves, and there is no need for a configuration in which both the upper table and the lower table move, unlike the aforementioned XY table. That is, there is no need for a stacked structure. Therefore, the structure becomes simple. Furthermore, since there is no need to increase rigidity, the weight does not need to be increased, and the movable table can be moved at high speed. Further, since the above-mentioned stacked structure is not required and there is no need for a feed screw or the like, the structure is simple and costs can be reduced.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a conventional example, Fig. 2 is a plan view showing an embodiment of the present invention, Fig. 3 is a similar side view, and Fig. 4 is a part for explaining the above-mentioned embodiment. An omitted perspective view, FIG. 5 is a plan view for explaining the operation of the above-described embodiment, and FIG. 6 is a similar side view. 22 is a fixed table, 23 and 24 are motors, 2
9 and 30 are the X arm, 31 is the X guide rail, 3
2 and 33 are Y arms, 34 are Y guide rails, 3
5 is a moving table, and 36 to 43 are guide rollers.

Claims (1)

[Claims] 1 a movable table comprising first and second guide shafts arranged to intersect with each other at a predetermined angle; an engaging member that engages with the first and second guide shafts; a first parallel arm that is loosely fitted to both ends of the guide shaft and arranged parallel to each other, and a first motor that rotationally drives one of the first parallel arms to rotate the first guide shaft in parallel. a first guide shaft parallel movement mechanism for moving; and the second
a second parallel arm that is loosely fitted to both ends of the guide shaft and arranged parallel to each other, and a second motor that rotationally drives one of the second parallel arms to rotate the second guide shaft in parallel. a second guide shaft parallel movement mechanism for moving the moving table, the moving table moves following an intersection of the first and second guide shafts that is displaced in accordance with the first and second guide shafts. A moving table drive mechanism.