JPS63191533A - Two dimensional positioning driving mechanism - Google Patents

Abstract

PURPOSE:To reduce the weight of a movable part and permit the speedy positioning with high precision by installing a trailing body in slidable ways in the vicinity of the crossing part between the drive shafts on the X and Y axis sides, in an X-Y plotter, etc. CONSTITUTION:When an X axis motor 20 and Y axis motor 40 are driven according to the position information, each revolution quantity is feedback- treated by an encoder, and ball screws 18 and 38 are turned, and drive shafts 16 and 36 are shifted in the X and Y directions, respectively, through ball nuts 22, 42, guide rails 12a, 12b, and 32a, 32b, and slide blocks 14a, 14b and 34a, 34b. Therefore, a trailing movable body 50 installed in slidable ways at the crossing point part of the both drive shafts 16 and 36 is positioned on the X-Y coordinate set by the both motors 20 and 40. Therefore, a positioning drive mechanism is prevented from being applied with a load particularly on one side, and the movable part can be made lightweight, and positioning can be carried out speedily with high precision.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention is directed to driving drive shafts on the Y side and the Y side, which are orthogonal on the XY plane, in the X direction and the Y direction by the Y side and Y side positioning drive mechanisms. The present invention relates to a two-dimensional positioning drive device in which the driven body is slidably attached at the intersection of these drive shafts, so that the driven body can be moved to any position on the XY plane.

[Prior art] The driven body is moved to the
Devices that can be moved to arbitrary positions on the Y plane are conventionally known, and a typical example thereof is an XY plotter.

In a conventional device of this kind, the entire Y-side positioning drive mechanism is mounted on a movable part driven by the Y-side positioning drive mechanism, and the driven body can be driven by the Y-side positioning drive mechanism. It is configured. In other words, the Y-side positioning drive mechanism moves the entire Y-side positioning drive mechanism in the X direction, and the Y-side positioning mechanism drives the driven body in the Y direction. The body can be positioned and driven to any position on the XY plane.

[Problems to be Solved by the Invention] The positioning drive mechanism generally includes a motor and a motion transmission mechanism that transmits its motion to a movable part. In a configuration in which the entire positioning drive mechanism is mounted, the weight of the movable part that must be moved by the X-side drive mechanism becomes very large, increasing the burden on the drive part, and the disadvantage is that high-speed drive is not possible due to the large inertia.

If you try to increase the speed, it is inevitable that the mechanism including the motor will become larger, especially on the X side.

The purpose of the present invention is to eliminate the drawbacks of the prior art as described above, to be able to move a driven body to any position on the XY plane, to reduce the weight of the moving part, to increase speed, and to achieve high positioning accuracy. Another object of the present invention is to provide a two-dimensional positioning drive device that does not require an increase in the size of the drive mechanism.

[Means for Solving the Problems] The present invention basically moves the driven body to any position on the XY plane by X-side and Y-side positioning drive mechanisms that operate independently and have substantially the same configuration. This is a device that makes it possible.

In order to achieve the above object, in the present invention, the X side and Y side positioning drive mechanisms include guide rails provided on both sides of the XY plane, guide blocks slidably attached to the guide rails, and It is equipped with a drive shaft installed between the guide blocks and driven. The driven body is attached near the intersection of the drive shafts on the X side and the Y side so as to be slidable relative to the drive shafts.

As the driving portion of the drive shaft, it is preferable to have a configuration in which, for example, a ball screw driven by a motor is disposed close to one of the guide rails, and a ball screw that is screwed into the ball screw is coupled to one of the guide plotters.

[Operation] The positioning drive mechanisms on the X side and the Y side have almost the same structure, and are provided and operated independently on the X side and Y side of the XY plane. When the guide block slides on the guide rail due to the operation of the drive unit, the drive shaft installed between the opposing guide blocks is driven in the X direction in the X-side positioning drive mechanism and in the Y direction in the Y-side positioning mechanism. be done.

The driven body located near the intersection of the drive shafts on the X and Y sides is slidably attached to the orthogonal drive shafts, so it can be moved to any position on the XY plane in response to the movement of the drive shafts. Moving.

Since the drive shaft is held by guide plotters guided by guide rails at both ends, the positional accuracy is high, and the total weight of the movable parts, that is, the guide block, the drive shaft, and the driven body can be reduced, so high-speed operation is possible.

[Embodiment] FIG. 1 is a schematic configuration diagram showing an embodiment of a two-dimensional positioning drive device according to the present invention, FIG. 2 is a plan view thereof, and FIG.
The figure is a front view of the X-side drive mechanism.

First, the positioning drive mechanism on the X side includes guide rails 12a and 12b arranged along the X axis on both sides of the XY plane IO, and a = boar guide rail 12a.

Guide block 1 slidably fitted to 12b
4a, 14b, an X-side drive shaft 16 installed between both guide blocks 14a, 14b, a ball screw 18 provided above and parallel to one guide rail 12b, and an encoder for rotationally driving the ball screw 18. It is composed of a motor 20, a ball nut 22 which is screwed into a ball screw 18 and connected to one guide block 14b, and the like.

Here, one end of the drive shaft 16 is fixed to one slide block 14a, while the other end passes through the inside of the linear bushing 24 and is slidably held against the slide block 14b, as shown in FIG. There is.

The Y-side positioning drive mechanism has almost the same structure as the above-mentioned X-side positioning mechanism. That is, guide rails 32a and 32b are arranged along the Y axis on both sides of the XY plane 10, and an eight guide rail 32a.

32b, a Y-side drive shaft 36 installed between both guide blocks 34a and 34b, and a Y-side drive shaft 36 installed above and parallel to one guide rail 32b. The motor 40 includes a ball screw 38, a motor 40 with an encoder that rotationally drives the ball screw 38, a ball nut 42 that is threadedly engaged with the ball screw 38 and connected to one guide block 34b, and the like. One end of the Y-side drive shaft 36 is also fixed to one slide block 34a,
The other end passes through the inside of the linear bushing and slides into the slide block 34.
It is held slidably with respect to b.

Here, the drive shaft 16 on the Y side and the drive shaft 36 on the Y side are arranged at different levels, and a positional relationship is maintained so as not to interfere with each other's movements. And the driven body 5 near the intersection of Y side and Y side drive shirt) 16.36
0 is located. This driven body 50 has linear bushes 52, 54 installed at different levels in the right angle direction, and the Y-side drive shaft 16 and the Y-side drive shaft 36 are slidably fitted into these, respectively.

The operation of this apparatus configured in this way is as follows. The Y-side and Y-side positioning drive mechanisms are operated according to the positional information to be driven. For example, on the Y side, the motor 20 is driven to rotate the ball screw 18 and drive the pole nut 22 to a predetermined position in the X direction. The amount of drive can be detected with an encoder attached to the motor. ball nut 22
moves, the slide block 14 connected to it
b slides on the guide rail 12b. Since this slide block 14b is connected to the other slide block 14a via the drive shaft 16, the drive shaft 16 is connected to the guide rails 12a located on both sides.
, 12b, and moves in the X direction to a predetermined position. At this time, one end of the drive shaft 16 is fixed to the slide block 14a, but the other end is slidable on the slide block 14b by the linear bushing 24, so the parallelism of both guide rails 12a and 12b may be slightly deviated. Even if there is play in the ball screw 18, it can be moved smoothly in the X direction regardless of the play, and since it has a structure in which both ends are supported, positioning can be performed with high precision. Similarly, the Y-side positioning drive mechanism allows the Y-side drive shaft 36 to be driven for positioning in the Y direction smoothly and with high precision.

Since the driven body 50 located at the intersection of these is slidable with respect to the drive shafts 16.36 on the Y side and the Y side by the linear bushes 52.54, it follows the movement of the drive shafts 16.36 in the XY plane. This means that it can be moved above and positioned at a predetermined position.

In this embodiment, as shown in FIG. 2, four limit switches 56 are installed at both ends of the ball screws 18 and 38 on the Y side and the Y side, respectively, to limit the movable range of the ball shafts 22 and 42. There is.

This prevents the slide block from falling off the rail due to runaway movement due to malfunction, etc.

Although a preferred embodiment of the present invention has been described above in detail, the present invention is not limited to only such a configuration.

Although a combination of a ball screw and a pole nut which are rotationally driven by a motor is illustrated as the driving part, it is also possible to use a linear motor or the like as the driving part.

Therefore, if a recording device is attached to the driven body of the present invention, it can be applied as an XY profiler, and if a large number of classification holes are formed in the XY plane and the opening at the lower end of the distribution pipe is attached to the driven body, a multi-class distribution device can be used. It can also be applied to

[Effects of the Invention] As described above, the present invention provides substantially the same positioning drive mechanisms on the Y side and the Y side around r@ on the xy plane, and the drive shafts intersect on the XY plane so that the intersection Since the structure has a slidable driven body in each part, there is no particular burden on one of the positioning drive mechanisms, and the weight of the movable parts can be significantly reduced and the inertia can be reduced, making it possible to perform high-speed positioning drive. can. However, since the drive shaft is supported at both ends, positioning can be performed with high precision, and the device configuration can be simplified and the weight can be reduced, which is an extremely advantageous effect.

In particular, since the present invention employs almost the same configuration on the X side and Y side, most parts can be made common, reducing the number of types of parts, making assembly easier, and parts management easier. There is also.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram showing an embodiment of a two-dimensional positioning drive mechanism according to the present invention, Fig. 2 is a plan view thereof, and Fig. 3 is an
A front view of the side positioning drive mechanism, FIG. 4 is an explanatory diagram showing one slide block and pole nut, and FIG.
The figure is an explanatory diagram of a driven body at an intersection. 10-XY plane, 12a, 12b, 32a. 32 b--Guide rail, 14a, 14b. 34a, 34b...Slide block, 16°36.
・・Drive shaft, 50・Followed body, 52゜54・
...Linear bush. Patent Applicant: Kuniyo Electric Industry Co., Ltd. Agent: Shigeru Miyoshi Hito Figure 1 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. In a device that can move the driven body to any position on the XY plane by the positioning drive mechanism on the X side and the Y side,
The X-side and Y-side positioning drive mechanisms include guide rails provided on both sides of the XY plane, guide blocks slidably attached to the guide rails, and drive shafts installed between the guide blocks and driven. A two-dimensional positioning drive device characterized in that the driven body is slidably attached to the drive shafts on the X side and the Y side near the intersection of the drive shafts.