JPS606323A - Simplified x-y table - Google Patents

Abstract

PURPOSE:To eliminate the need for the control for putting a table in or out of motion when the table is to be shifted or stopped, by providing a rotary member rotating about a vertical axis within a drive portion. CONSTITUTION:A drive portion 3 is interposed between a base member 1 and a table 2, wherein the drive portion 3 is supported so as to be able to slidably travel straightly in one direction with reference to the base 1. On the top face along the both sides in parallel with the X axis of the member 1, there are fixedly provided a first and second ratchets 4, 5 which are toothed in the opposite directions with each other, and on the bottom face along the both sides in parallel with the Y axis of the table 2, there are fixedly provided a third and fourth ratchets 6, 7 which are toothed in the opposite directions with each other. Within the drive portion 3, there is provided a disk, or a rotary member, rotatable about a vertical axis, which disk is provided with a first to fourth ratchet pawls 9-12 which engage the first to fourth ratchets, respectively, whereby the table 2 is adapted to shifted upon selection of the engagement.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a simple type XY table, and more particularly to a simple type XY table configured so that the table can be moved in steps in the X direction and the Y direction by a single drive device.

Place the object on the table and cross it at right angles to each other
Conventionally, an XY table configured to be able to move in the Y-axis direction, that is, to any point on a certain plane, is generally an XY table equipped with a feed screw mechanism and a motor (DC servo motor or pulse motor) that drives it. By combining the feeding mechanisms and driving and controlling these feeding mechanisms appropriately, the table installed on top of these is configured to be able to take any position on the plane while maintaining its direction constant. There is.

In other words, the conventional XY table is
Since separate feed screws or drive motors are required for each direction, the control becomes complicated, and the entire device including the control system becomes considerably large-scale and expensive. The problem is that it is not possible.

On the other hand, by moving the table on which items are arranged in a grid with predetermined pinch points in steps, the specified work can be carried out in sequence, and the accuracy of the table's stopping position is not required. In such a case, regarding each direction of X-Y as described above,
Expensive conventional XY tables, which have feeding mechanisms equipped with DC servo motors or pulse motors and require complex control systems to control them, are unsuitable.

The present invention has been devised in view of the above, and its purpose is to provide a simple type
The idea is to provide a new table.

In order to achieve such an objective, the present invention takes the following technical measures.

That is, the driving part is supported so as to be slidable in the X-axis direction with respect to the base member, the table is supported so as to be slidable in the Y-axis direction with respect to the driving part, and the table is supported so as to be slidable in the Y-axis direction with respect to the driving part. The base member is provided with a first ratchet tooth and a second ratchet tooth that face parallel to the Y-axis and have teeth in opposite directions; and a third ratchet tooth and a fourth ratchet tooth whose teeth are in opposite directions to each other, and a swinging member that swings about a vertical axis is provided in the drive unit, and the swinging member has the following features: A first ratchet pawl, a second ratchet pawl, a third ratchet pawl, and a fourth ratchet pawl are provided, which can select a state in which they engage with each of the ratchet teeth and a state in which they do not engage.

For example, if only the first ratchet pawl is in a state where it can engage with the first ratchet teeth, the swinging member to which the ratchet pawl is attached is oscillating around the vertical axis, so the first ratchet pawl is engaged with the first ratchet tooth. Push the ratchet teeth in one direction. Due to the reaction force at this time, the portion of the XY table of the present invention above the drive section moves intermittently along the Y axis. Further, when only the second ratchet pawl is brought into a state where it can engage with the second ratchet teeth, the portion of the XY table of the present invention above the drive section is intermittently moved in the opposite direction to the above along the Y axis. That will happen. Furthermore, when only the third ratchet pawl is brought into a state where it can engage with the third ratchet tooth, the table moves intermittently in the Y direction with respect to the drive section. Further, for example, if the first ratchet pawl is brought into a state in which it can engage with the first ratchet teeth, and the third ratchet pawl is brought into a state in which it is possible to engage with the third ratchet teeth, the table will be able to move along the Y axis with respect to the base member. and the Y-axis.

The most characteristic feature of the device of the present invention is that, as is clear from the above-mentioned general explanation of its operation, its driving source is the swinging of a single swinging member disposed within the drive section. be. This swinging does not require control to move and stop the table, and it is sufficient to simply swing the table, so there is no need to use a high-grade drive source such as a DC servo motor. Moreover, because of this and because only one driving source is required, the cost of parts is reduced. Furthermore, in order to move or stop the table, it is only necessary to select a state in which the first to fourth ratchet pawls can engage with their corresponding ratchet teeth and a state in which they do not engage. Control is much simpler than before.

Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a perspective view schematically showing the external appearance of an embodiment of a simple XY table according to the present invention, and FIG. 2 is a perspective view showing the internal structure of FIG. FIG. 2 is a partially cutaway perspective view with the housing omitted.

As is clear from FIG. 1, the base member 1 and the table 2
The driving part 3 is interposed between the base member 1 and the driving part 3, and the driving part 3 is supported so as to be able to slide linearly in one direction with respect to the base member 1 (in this way, the driving part 3
Here, the direction in which the table 2 moves with respect to the base member 1 is the X-axis direction).
As described above, this drive unit 3 is supported so as to be able to slide linearly in a direction perpendicular to the direction in which it moves relative to the base member 1 (in this way, the table 2 is Here, the direction of movement relative to the Y-axis is defined as the Y-axis direction). As shown in FIG. 2, the base member 1 has a substantially rectangular shape that is long in the X-axis direction.
First ratchet teeth 4 and second ratchet teeth 5 having opposite tooth directions are fixed to the upper surface along opposite sides in the axial direction. Further, the table 2 also has a substantially rectangular shape that is long in the Y direction, and a third ratchet tooth 6 and a fourth ratchet tooth 7 whose teeth are in opposite directions are fixed to the lower surface along the opposite side in the Y axis direction. There is.

On the other hand, a disk serving as a swinging member 8 that is swingable around a vertical axis is disposed inside the drive section 3, and this disk is engaged with the first to fourth ratchet teeth. a first ratchet pawl 9 that can be selected to be engaged or not engaged;
A second ratchet pawl 10, a third ratchet pawl 11 and a fourth ratchet pawl 12 are attached.

Further, as a means for swinging the disk 8, in this embodiment, as schematically shown in FIG. 3, a spring 1 is used.
3 elastically biases the disc 8 in one direction, a cam follower 14 is fixed to the disc 8, and the cam follower 14 is brought into contact with the rotating cam 15 by the force of the spring 13. It consists of

The above configuration will be explained in more detail with reference to FIGS. 4 to 6.

In order to support the drive unit 3 so as to be able to slide in the X-axis direction with respect to the base member 1, in this embodiment, the fourth
As shown in the figure and FIG. 6, guide rollers 16 that roll while hugging the side surfaces of the base member 1 are attached to the left and right connecting parts of the lower surface of the drive unit 3, and It is constructed by attaching rollers 17... that roll on the rollers. That is, the guide rollers 16 prevent the drive section 3 from shifting in the lateral direction, and the rollers 17 support the weight above the drive section 3 with respect to the base member 1. -ing Note that the means for supporting the table 2 so as to be slidable in the Y-axis direction with respect to the drive unit 3 also employs a configuration similar to that described above. That is, as shown in FIGS. 4 to 6, a guide roller 18 that rolls around the side surface (long side) of the table 2 is attached to a continuous section on the upper surface of the drive section 3. At the same time, rollers 19, which are transferred in contact with the lower surface of the table 2, are also attached. Guide roller 18... is table 2
The rollers 19 play the role of supporting the weight of the table 2 by preventing it from shifting in the lateral direction. Further, as shown in FIG. 4, a leaf spring 20 is provided at the lower part of the drive unit 3, the tip of which elastically contacts the upper surface of the base member 1.
A leaf spring 21 is attached to the upper surface of the driving section 3 so as to provide a certain resistance to the sliding movement of the driving section 3 relative to the base member, and whose tip elastically contacts the lower surface of the table 2, as shown in FIG. , also provides a certain resistance to the sliding movement of the table 2 with respect to the drive unit 3.

As is clear from FIGS. 4 to 6, the drive section 3
has a box-shaped frame 22 as a whole. Inside this frame 22, a disc that can swing around a vertical axis is disposed. The lower support plate 24 rotatably supports both upper and lower ends of a vertical rotating shaft 25 that supports a disk.

As shown in FIGS. 4 and 5, a motor 26 for driving the swinging member 8 is attached to the side of the frame 22. As shown in FIGS. The above-described cam 15 is attached to the rotational output shaft of this motor 26.
In addition, a cam follower 14 fixed to the outer periphery of the disc 8 is in constant contact with the cam 15. Although not shown in FIG. 5, the disk 8 is given a tendency to rotate counterclockwise in FIG. 5 by a spring 13.

Thus, when the rotary cam 15 is rotated, the disk 8 starts a rocking motion in which the cam 15 pushes it clockwise in FIG. 5 and the spring 13 pushes it back counterclockwise in FIG. 5.

The disk 8 that swings as described above has first and second ratchet teeth 4, 5 fixed to the base member l, and third and fourth ratchet teeth 6, 7 fixed to the lower surface of the table 2. 9.10.1 The first to fourth ratchet pawls can be engaged or not engaged with each other.
1.12 is installed. In this embodiment, a so-called rotary solenoid is used as a means for selecting a state in which each ratchet pawl can engage with its corresponding ratchet tooth and a state in which it does not engage. are doing.

FIG. 5 shows the third and fourth ratchet pawls 11.12 associated with a rotary solenoid 27.28 mounted on the disc 8.

The rotary solenoids 27 and 28 each have a substantially cylindrical shape, and when the rotary solenoids 27 and 28 are energized, the rotating part on the top surface tends to rotate clockwise in FIG. It is designed to return to rotation counterclockwise in Fig. 5 by a spring or the like. The ratchet pawl 11
．． 12 is supported at its intermediate portion on the disk 8, and its rear end is connected to the other end of a rod 29 whose one end is connected to an eccentric position of the rotating portion of the rotary solenoid 27, 28. . The first and second ratchet pawls 9.10 and the rotary solenoid for selecting their states are provided on the back side of the disc 8 shown in FIG. 5 in the same way as the third and fourth ratchet pawls 11.12. It is composed of

Next, the operation of this embodiment will be explained.

For example, to explain the case where you want to move the table 2 in the positive direction of the Y-axis direction (the upward direction is positive in FIG. When the rotary solenoid 27 is turned on, the tip of the third ratchet pawl 11 moves clockwise in FIG. However, since the force for this is obtained electromagnetically by the rotary solenoid 27, the pawl 11 can elastically return in the direction of the arrow Q if an external force is applied. Therefore, of the rocking motion of the disc 8, only the counterclockwise motion in FIG. 5 is transmitted to the third ratchet tooth 6 or the table 2 via the pawl 11. The pinch of the ratchet teeth 6 may be set to the pinch at which the table 2 is to be moved step by step. Y for table 2
If you want to move in the negative axial direction, turn off the rotary solenoid 27 for the third ratchet pawl 11.
F and turn on the rotary solenoid 28 for the fourth ratchet pawl 12 instead.Also, if you want to move the table 2 in the X-axis direction, turn on the first or second ratchet pawl 9, 10. , just turn on one of the rotary solenoids.

As described above, according to the simple XY table of the present invention,
Since only one driving source is required, the configuration is simple, the reliability of operation is improved, and manufacturing costs are reduced.In addition, each ratchet pawl does not engage with its corresponding ratchet tooth. Since the table can be moved in a desired direction simply by selecting the state, the control becomes easy.

It goes without saying that the scope of the present invention is not limited to the embodiments shown in the drawings.

For example, as a means for swinging the swinging member,
In addition to using a cam, a so-called crank mechanism can also be used. Further, in the illustrated example, the rotary solenoid and the ratchet pawl are linked via the rod 29, but the ratchet pawl may be directly supported by the output shaft of the rotary solenoid. Further, as means for selecting each state of the ratchet pawl, in addition to using a rotary solenoid as shown in the illustrated example, various modifications can be considered. However, due to the nature of the ratchet pawl being operated in combination with ratchet teeth, it is desirable to apply an electromagnetic biasing force to the ratchet pawl as in the embodiment.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a perspective view schematically showing the external appearance of the device, FIG. 2 is a schematic perspective view showing the interior of FIG. 1 with a cutout, and FIG. FIG. 4 is a perspective view schematically showing an example of means for swinging the swinging member.
FIG. 5 is a cross-sectional front view showing details of an embodiment of the present invention, FIG. 5 is a cross-sectional plan view, and FIG. 6 is a side view in the ■ direction of FIG. 4. ■・・・Base member, 2・・・Table,
3... Drive unit, 4... First ratchet tooth, 5... Second ratchet tooth, 6...
Third ratchet tooth, 7. Old... Fourth ratchet tooth, 8.
... Swinging member (disk), 9... First ratchet throat pawl, 10... Second ratchet pawl, 11
...Third ratchet pawl, fourth ratchet pawl for 12... Applicant: ROHM Co., Ltd.

Claims (1)

[Claims] (1) A drive unit is supported so as to be slidable in the X-axis direction with respect to the base member, and a table is supported so as to be slidable in the Y-axis direction with respect to the drive unit, and the pace member a first ratchet tooth and a second ratchet tooth are provided on the table, facing parallel to the X-axis and having tooth directions opposite to each other; and on the table, facing parallel to the Y-axis; A third ratchet tooth and a fourth ratchet tooth are provided in which the directions of the teeth are opposite to each other, and a swinging member that swings about a vertical axis is provided in the drive section, and the swinging member has a third ratchet tooth and a fourth ratchet tooth that have opposite directions to each other. A first ratchet pawl, a second ratchet pawl, a third ratchet pawl, and a fourth ratchet pawl are provided, which can select a state in which they engage with each other and a state in which they do not engage with each other.
Simple XY table.