JPH078463B2 - Table positioning mechanism - Google Patents

Description

TECHNICAL FIELD The present invention relates to a table positioning mechanism applicable to precision measuring instruments, precision processing machines, general industrial machines, industrial robots, and the like.

(Prior Art) A conventional work table positioning mechanism in a general industrial machine or the like includes two sets of uniaxial moving mechanisms that are movable in one direction by a pair of left and right linear guide bearings and one feeding mechanism. There is something I did.

The uniaxial movement mechanisms are combined and configured so that the movement direction of the uniaxial movement mechanism coincides with the orthogonal axis, whereby the positioning mechanism of the working table achieves the positioning on the orthogonal axis.

(Problems to be Solved by the Invention) However, in such a configuration, there are problems that the space occupied by the mechanism is large, the number of parts is large, and the cost is high.

The present invention aims to solve such problems.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a support base with a linear guide shaft on which a first sliding member and a second sliding member are provided. Are arranged so that the first sliding member and the second sliding member slide on the guide shaft by a driving mechanism, respectively, and either the first sliding member or the second sliding member is provided. One end of the parallel link is pivotally attached to one side and one end of the link is pivotally attached to the other side, and a table is pivotally attached to the other ends of the parallel link and the link. By moving the second sliding member on the guide shaft to control the relative positional relationship, the parallel link and the link are interlockedly displaced, and the table is moved in the axial direction of the guide shaft and the axial direction of the guide shaft. Adjust the holding position at right angles It is a thing.

The drive mechanism according to the present invention includes a screw shaft provided on the support in the same direction as the axial direction of the guide shaft, a female screw member that moves back and forth on the screw shaft, and is attached to one end of the screw shaft. A driving motor, and the female screw members are attached to the first sliding member and the second sliding member, respectively.

(Operation) According to the present invention, the drive mechanism controls the positions of the first sliding member and the second sliding member to displace the parallel link and the link, thereby causing the table to move in the axial direction of the guide shaft and the guide shaft. It is possible to adjust the holding position in the direction perpendicular to the axial direction of the. Further, the moving directions of the first sliding member and the second sliding member are made to coincide with one of the two axial directions to be positioned, and the other axial direction of the two axial directions is caused by the indirect movement of the link mechanism. Since the table is aligned with the moving direction and the positioning is done in two axes,
A drive mechanism in the direction of the other axis and a special transmission mechanism are unnecessary, the structure can be simplified, and the occupied space becomes small.

(Example) Next, one example of the positioning mechanism of the table according to the present invention will be described with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 indicates a table positioning mechanism. The positioning mechanism 1 includes guide rails 3a and 3b, which are linear guide shafts fixed to a support base 2, and guide rails 3a and 3b. A first sliding member 4a and a second sliding member 4b that slide on the first sliding member 4a, and a parallel link 5 to the first sliding member 4a.
One end of the parallel link 5 and the link 6 are axially attached to the second sliding member 4b so that the parallel link 5 and the link 6 cross each other, and the other end of the parallel link 5 and the link 6 has a table. 7 is pivoted.

The positioning mechanism 1 includes a drive mechanism 8 as shown in FIG. That is, the drive mechanism 8 is the guide rail 3
Screw shafts 10a, 1 interposed between the support members 9a, 9b at both ends of the support base 2 so as to be oriented in the same axial direction as a, 3b.
0b, female screw members 11a, 11b that move forward and backward on the screw shafts 10a, 10b, and drive motors 12a, 12b attached to one end of the screw shafts 10a, 10b. The female screw members 11a and 11b are attached to the first sliding member 4a and the second sliding member 4b, respectively. That is, as shown in FIG. 3, of the female screw members 11a and 11b, the female screw member
The reference numeral 11b is incorporated in a portion projecting below the second sliding member 4b placed so as to be bridged between the guide rails 3a and 3b. Since the female screw member 11a is also attached to the first sliding member 4a in the same manner, illustration and description thereof are omitted.

The operation of the table positioning mechanism 1 having such a configuration is as follows.

By driving the drive motors 12a and 12b, the screw shafts 10a and 10b rotate, and the female screw members 11a and 11b move together with the first sliding member 4a and the second sliding member 4b.
Move forward and backward on 0b. In this case, the screw shaft 10
By rotating a and 10b in the same direction, the first sliding member
The 4a and the second sliding member 4b can slide on the guide rails 3a and 3b (X axis) by the same distance to move and hold the table 7 at a desired position (see FIG. 4).

Further, by driving only one of the drive motors 12a and 12b to change the relative position between the first sliding member 4a and the second sliding member 4b, the parallel link 5 and the link 6 are displaced, The table 7 can be vertically adjusted and moved and held in the vertical direction (Z axis) which is a direction perpendicular to the axial directions of the guide rails 3a and 3b (see FIG. 5).

As shown in FIG. 6, the parallel link 5 and the link 6 are attached to the upper surfaces of the first sliding member 4a and the second sliding member 4b and the table 7 facing the guide rails 3a and 3b. Then, the table 7 can be moved and adjusted in the horizontal direction (Y axis).

As described above, according to the present invention, the first sliding member 4a and the second sliding member 4b are moved in the axial direction of the guide rails 3a and 3b to control the positions, so that the positioning in the two axial directions is performed. It will be possible.

In addition, the guide rails 3a and 3b should be positioned in the axial direction 2
By matching with one axis (X axis) in the axial direction,
Since the installation positions of the drive motors 12a and 12b are determined at one place, the space occupied by the positioning mechanism 1 can be correspondingly small.

Furthermore, since the other axis (Y axis or Z axis) of the two axis directions is made to coincide with the direction in which the table 7 is moved by the indirect movement of the parallel link 5 and the link 6,
A drive mechanism in the other axis direction and a special transmission mechanism are unnecessary and the structure is simplified.

Although the table positioning mechanism according to the present invention has been described with reference to the embodiment, a linear motor may be applied to the drive mechanism. If such a linear motor is applied, the space for the drive motors 12a and 12b becomes unnecessary,
The soot of the positioning mechanism can be further reduced.

(Effect of the Invention) According to the present invention, two sets of uniaxial moving mechanism configured to move in one direction by a pair of right and left linear inner bearings and one feeding mechanism are provided as in the conventional case, and the uniaxial moving is performed. The moving directions of the mechanisms are not combined and configured so as to match the orthogonal axes, but the moving directions of the first sliding member and the second sliding member are made to match one of the two axial directions to be positioned. Therefore, the position of the drive mechanism is set at one place, and the space can be saved accordingly.

Further, the other axis of the two axis directions is aligned with the direction in which the table is moved by the indirect movement of the ring mechanism, and the positioning in the two axis directions is performed. No special transmission mechanism is required, and the configuration can be simplified.

[Brief description of drawings]

FIG. 1 is a schematic side view showing one embodiment of a table positioning mechanism according to the present invention, FIG. 2 is a schematic plan view showing one embodiment of the table positioning mechanism shown in FIG. 1, and FIG. In FIG. 1, a cutting arrow view taken along the line AA, FIGS. 4 and 5 are explanatory views of the operation of a table positioning mechanism according to the present invention, and FIG. 6 is a table positioning according to the present invention. FIG. 7 is a schematic plan view showing another embodiment of the mechanism, and FIG. 7 is an explanatory view of the action of the positioning mechanism of the table shown in FIG. 1 ... Positioning mechanism, 2 ... Support base, 3a, 3b ... Guide rail, 4a, 4b ... Liquid, 5 ... Parallel link, 6 ... Link, 7 ... Table, 8 ... Drive mechanism, 9a , 9b ...... Support member, 10a, 10b ...... Screw shaft, 11a, 11b ...... Female screw member, 12a, 12b ...... Drive motor

Claims (2)

[Claims] 1. A linear guide shaft is provided on a support base, and a first sliding member and a second sliding member are arranged on the guide shaft, and the first sliding member and the second sliding member are provided. Each moving member is made to slide on the guide shaft by a drive mechanism,
One end of the parallel link is pivotally attached to either one of the first sliding member or the second slide member and one end of the link is pivotally attached to the other, and a table is attached to the parallel link and the other end of the link. The parallel link and the link are interlockingly displaced by axially mounted and by moving the first sliding member and / or the second sliding member on the guide shaft by the drive mechanism to control the relative positional relationship, and the table is moved. A table positioning mechanism characterized in that a holding position is adjusted in an axial direction of a guide shaft and a direction perpendicular to the axial direction of the guide shaft. 2. The drive mechanism according to claim 1, wherein a screw shaft provided on the support base in the same direction as the axial direction of the guide shaft, a female screw member that moves back and forth on the screw shaft, and one end of the screw shaft. And a drive motor attached to the portion, wherein the female screw members are attached to the first sliding member and the second sliding member, respectively.