JPH0519859A - In-plane position mechanism - Google Patents

Abstract

PURPOSE:To use only one actuator, to reduce the size and weight of the mechanism itself and also to reduce its power consumption as to an in-plane positioning mechanism which moves one driving point to a specific position or corrects the deviation from an initial position due to an external factor and secures the initial position. CONSTITUTION:The in-plane positioning mechanism consists of a front plate type guide 4 or front circular spiral stage type spiral guide 11 which has spiral guide grooves 5 and 12 digged in the top surface or outer peripheral spiral stage surface, swivel bars 7 and 13 which have base ends fixed to the upper end of the rotary shaft 2 of a rotary motor 1 rotatably penetrating the center of the guide 4 or spiral guide 11 and swivel along the top surface or outer peripheral spiral stage surface integrally as the rotary shaft 2 rotates, and driving slide bars 8 and 15 which project having one-end parts slidably fitted in the guide grooves 5 and 12 and are slidably inserted into guide slots 9 and 14 extending in the length direction of the swivel control bars 7 and 13; and the driving slide bars 8 and 15 are freely positioned and moved along the guide grooves 5 and 12 as the swivel control bars 7 and 13 swivel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-plane positioning mechanism that secures an initial position by moving a certain driving point to a predetermined position or correcting a deviation from an initial position due to an external factor.

[0002]

2. Description of the Related Art FIG. 6 shows a plan view of a typical configuration example of a conventional in-plane positioning mechanism of this kind, and FIG. 7 shows a side view thereof.
In the figure, a is a y-axis direction rail of the linear motor, b is a y-axis direction sliding portion slidably mounted on the y-axis direction rail a of the linear motor, and c is a y-direction slide of the linear motor. An x-axis direction rail whose base is fixed orthogonally on the moving part b and d is an x-axis direction sliding part slidably mounted on the x-axis direction rail c.

The x-axis direction linear movement of the x-axis direction sliding portion d is performed by itself sliding on the x-axis direction rail c, while the y-axis direction linear movement is performed by the x-axis direction rail. c
The y-axis direction sliding portion b having the base portion cantilevered on the upper side is made to slide on the y-axis direction rail a together with the x-axis direction rail d.
The axial sliding portion d can be freely positioned within the plane coordinates.

[0004]

However, in the above-described conventional structure, since one linear motor as an actuator is required in each of the x and y axis directions, the weight of the in-plane positioning mechanism itself increases. In addition, there is a problem that there is a limit to miniaturization of the mechanism and power consumption is also required. In view of the above-mentioned conventional problems, the present invention provides an in-plane positioning mechanism that is more compact and can be operated by a single motor.

[0005]

The above-mentioned problems can be solved by the present invention by adopting the following novel characteristic construction means. That is, the feature of the present invention is that the rotation shaft of the rotary motor is rotatably passed through the center of the front plate type guide or the front conical vortex step spiral guide in which the spiral guide groove is excavated on the upper surface or the outer peripheral vortex step surface, A swivel restriction bar is provided, which is fixed to the upper end of the rotary shaft, and swivels integrally with the rotation of the rotary shaft along the upper surface or the outer peripheral spiral step surface, and one end is slidably fitted in the guide groove. The projecting drive slide bar is slidably inserted into a guide elongated hole extending in the longitudinal direction of the swivel restriction bar, and the drive slide bar is inserted into the guide groove as the swivel restriction bar swivels. It is an in-plane positioning mechanism that is formed so as to be positioned and movable along it.

[0006]

Since the present invention has taken the above-mentioned means, the driving slide bar guided in the guide groove by the turning restriction bar is moved for positioning in the plane and the radial radial coordinate position from the rotating shaft. Is performed by performing long and short displacements, so that only one motor is required as an actuator.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Prior to the embodiments of the present invention, the principle of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing the principle of the present invention, and FIG.
2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is an enlarged sectional view of the groove portion in FIG. In the figure, 1 is a rotary motor, 2 is a rotary motor 1
Rotating shaft, 3 is a connecting member, 4 is a front plate type guide in which a spiral guide groove 5 is dug on the upper surface, 6 is a bearing,
Reference numeral 7 is a turning regulation bar, 8 is a drive slide bar, and 9 is a guide elongated hole.

The drive slide bar 8 has a wide cross-section spiral guide groove 5 dug in a guide 4 whose enlarged cross section is shown in FIG.
2 is inserted and fitted in, and the movement in the direction of arrow α in FIG. 2 is restricted. On the other hand, the guide 4 is connected to the non-rotating main body 1a of the rotary motor 1 through the connecting member 3, and the center thereof is inserted through the rotary shaft 2 through the bearing 6. A base end of the turning restriction bar 7 is cantilevered horizontally at a right angle to the upper end of the through hole.

The turning restriction bar 7 has a length longer than a radius connecting the center of the spiral guide groove 5 dug in the guide 4 to the outermost end, and extends in the longitudinal radial direction of the turning restriction bar 7. The drive slide bar 8 is inserted from above the guide 4 into the extended guide long hole 9, and the swollen root 8a at the lower end of the drive slide bar 8 is formed in the guide 4 as described above. 5 is slidably inserted and fitted. According to the principle of the present invention, the turning restriction bar 7 is driven to rotate by the rotation of the rotary shaft 2 of the rotary motor 1, and as a result, the drive slide bar 8 inserted into the guide elongated hole 9 of the turning restriction bar 7 is subjected to the turning restriction. The coordinate positioning in the plane is performed by being pushed by the bar 7 and curvedly moving in the tangential direction on the guide 4.

Embodiments of the present invention will be described with reference to the drawings. FIG. 4 is a sectional view of the in-plane positioning mechanism of this embodiment, and FIG. 5 is an enlarged sectional view of the groove portion of the conical spiral spiral guide. In the figure, 1 is a rotary motor, 2 is a rotary shaft of the rotary motor 1, and 10
Is a constrained bellows, 11 is a conical spiral spiral guide in which a spiral guide groove 12 is dug along the outer peripheral swirl side surface 11a, 6 is a bearing, and 13 is a rotary shaft that matches the outer peripheral swirl surface inclination angle θ. 2 A swivel control bar having a base end cantilevered to the upper end with an oblique inclination and extending through a guide slot 14 in the longitudinal radial direction; The L-shaped drive slide bar 16 which is fitted to and the orthogonal portion is inserted into the elongated guide hole 14 of the turning restriction bar 13 is a rotator board. The same members as those in the description of the principle of the present invention are designated by the same reference numerals.

The turning restriction bar 13 and the rotary disk 15 are connected to the rotary shaft 2 of the rotary motor 1, while the conical spiral spiral guide 11 is fixed to the main body 1a of the rotary motor 1 via a restraining bellows 10. Has been done. The rotation restricting bar 13 is rotated by the rotation of the rotary motor 1, and the drive slide bar 15 pushed by the rotating restricting bar 13 is driven by the conical vortex step spiral as in the case of FIGS. The guide 11 is curvedly moved in the tangential direction on the outer peripheral vortex step side surface 11a and positioned at an arbitrary point on the conical vortex step spiral guide 11.

As shown in FIG. 5, the outer peripheral vortex step surface inclination angle of the conical vortex step spiral guide 4 is θ, and the pitch (the distance of the drive slide bar 15 per turn of the turning restriction bar 13 in the y direction) is p. Then, the distance that the drive slide bar 15 advances in the x direction is represented by p · tan θ. Therefore, by reducing the outer peripheral vortex step surface inclination angle θ of the conical vortex step spiral guide 11, the x of the drive slide bar 15 is reduced.
Since the distance p · tan θ that travels in the direction can be reduced, as a result, the resolution of the positioning of the drive slide bar 15 can be improved.

Here, in order to prevent the drive slide bar 15 from moving downward in the y direction, the conical spiral step type spiral guide 11 and the rotator disc 16 are formed on the outer peripheral spiral step of the conical spiral step type spiral guide 11. The spiral guide groove 12 digging along the side surface 11a is connected by a screw pair set in the opposite winding, and the pitch is the spiral guide groove 12 digging in the conical spiral step type spiral guide 11. Pitch p
It is set to the same as. Since the rotator board 16 is connected to the rotary shaft 2 of the rotary motor 1, it is configured to rotate synchronously with the rotary shaft 2 of the rotary motor 1 and the turning restriction bar 13.

The conical spiral step type spiral guide 11 is connected to the main body 1a of the rotary motor 1 via a constraining bellows 10, and the restricting bellows 10 constrains the rotational movement of the conical spiral step spiral guide 11. . Therefore, in the in-plane positioning mechanism of the present invention, although the rotator board 16 rotates with the rotation of the rotary motor 1, the conical spiral step-type spiral guide 11 does not rotate, and the rotary motor 1 is rotated by one rotation. The conical vortex step-type spiral guide 11 moves downward in the y direction by p, and the drive slide bar 15 does not move upward or downward in the y direction, so that in-plane driving can be ensured.

[0015]

As described above, according to the present invention, the driving slide guide guided in the guide elongated hole of the turning restriction bar is positioned in the plane from the rotation axis of the front plate type guide and the front conical spiral step type spiral guide. Since it is performed by fitting the radial radial coordinate position in the spiral guide groove whose length changes, the in-plane positioning mechanism, which requires two actuators in the prior art, can be configured with one actuator. It has the utility and usefulness that the mechanism can be made lighter and smaller, and the power consumption can be expected to be reduced.

[Brief description of drawings]

FIG. 1 is a plan view showing the principle of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

3 is an enlarged cross-sectional view of the spiral guide groove portion in FIG.

FIG. 4 is a cross-sectional view of the in-plane positioning mechanism of this embodiment.

FIG. 5 is an enlarged cross-sectional view of a guide groove portion of a conical vortex step spiral guide.

FIG. 6 is a plan view of a typical configuration example of a conventional in-plane positioning mechanism.

FIG. 7 is a side view of the same.

[Explanation of symbols]

 1 ... Rotary motor 1a ... Main body 2 ... Rotary shaft 3 ... Connecting member 4 ... Plate type guide 5,12 ... Guide groove 6 ... Bearing 7,13 ... Rotation control bar 8,15 ... Drive slide bar 9,14 ... Guide oblong hole 10 ... Restraining bellows 11 ... Conical vortex step spiral guide 11a ... Peripheral vortex step side surface 16 ... Rotor board a ... y-axis direction rail b ... y-axis direction sliding part c ... x-axis direction rail d ... x-axis direction sliding Department

Claims (1)

Claim: What is claimed is: 1. A rotary shaft of a rotary motor is rotatably mounted at the center of a front plate type guide or a front conical spiral step type spiral guide in which a spiral guide groove is excavated on an upper surface or an outer peripheral spiral step surface. A swirl restricting bar that penetrates through and has a base end fixed to the upper end of the rotary shaft and that swivels integrally with the rotation of the rotary shaft along the upper surface or the outer peripheral swirl surface is provided, and the end portion is slidable in the guide groove. The drive slide bar that is fitted and protrudes is slidably inserted into a guide elongated hole that extends in the longitudinal direction of the swivel restriction bar, and the drive slide bar is guided by the swivel motion of the swivel restriction bar. In-plane positioning mechanism characterized by being formed so as to be positioned and movable along the groove