JPS60221809A - Moving device - Google Patents

Abstract

PURPOSE:To make a moving base execute a rotational motion and a translationl motion by the same mechanism, by pushing a block having a V-groove and a block having a plane, which have been fixed to the moving base, by the tip of a screw, respectively. CONSTITUTION:A moving base 21 is placed on guides 25, 26 installed to a fixed base 24, and a block 31 having a V-groove and a block 32 having a plane, which have been fixed to its rear side are pushed by the tip of screws 35, 34 engaged with nuts 33, 34 fixed to the fixed base 24, by which the moving base 21 executes a rotational motion and a translational motion against a tensile force of springs 29, 30.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a moving device that performs rotational movement and translational movement by the same mechanism.

[Background of the invention]

Various movements within a plane consist of a mixture of rotational movement and translational movement, or only one of the above movements.For example, reflection to reflect a light ray along a predetermined optical axis. The mirror adjustment device drives the reflecting mirror by rotational movement around a certain point within the reflecting mirror and translational movement of the reflecting surface. Further, the optical modulator adjustment device operates to align the optical modulator with a certain determined optical axis by rotational movement and translational movement about one point within the optical modulator.

An example of a conventional device that performs the above operation is shown in Figure 1 (
References 22Con Technical Journal.

No, 3. p, 40.1973; No, 4. p,
30-31, 11373), in the same figure, a rotary table 2 is provided on a movable table l around a vertical axis 3, and an arm 4 is attached to the rotary table 2, and the arm 4 is attached to a movable table l.
It is always pulled in the direction of the fixed column 5 by a spring 6 whose one end is attached to the fixed column 5 provided above, and is received by the tip of a screw 8 engaged with a nut 7 fixed on the movable table l. There is. Therefore, by rotating the screw 8, the rotary table 2 can be finely rotated without causing backlash.

On the other hand, the movable table 1 is movable only in the direction of the double-headed arrow 11 via a dovetail groove 10 on the fixed table 9.
It is always pulled in the direction of the fixing column 12 by a spring 13, one end of which is attached to the fixing column 12 provided in the fixing column 12, and is received by the tip of a screw 15 engaged with a lug 14 attached to the fixing base 9. Therefore, by rotating the screw 15, the movable table 1 can be minutely moved on the fixed table 9 in the direction of the arrow 11.

In this way, the conventional device is constructed by stacking a rotation device and a translation device, and performs one rotational movement and translational movement.

However, this type of configuration inevitably has the following drawbacks.

(1) Since the rotation device and the translation device are stacked on top of each other, the height inevitably becomes large.

(2) The number of parts constituting the device increases, making it expensive.

(3) When assembling the device, there are many parts that require adjustment, such as dovetails used in the translation device, and adjustment requires a lot of effort and time.

(Objective of the Invention) The present invention eliminates the above-mentioned drawbacks by performing rotational motion and translational motion using the same mechanism. By pushing with the tip, rotational movement and translational movement can be performed.Hereinafter, the present invention will be explained in detail with reference to examples.

[Embodiments of the invention]

FIG. 2(a) is a perspective view of an embodiment of the present invention, and FIG. 2(b) is a plan view of the embodiment of the present invention, in which a movable table 21 is made to perform rotational and translational movements, and an optical modulator 22 fixed on the movable table 21 is shown. The position of the optical modulator 22 and the optical axis 23 are not shown in FIG. 3(b) for the sake of simplicity. Omitted.

Here, the movable table 21 is a guide 25 attached to a fixed table 24.
, 2'6, and are movable on the plane defined by the guides 25 and 26, and are attached to the fixed columns 27a and 28a attached to the fixed base 24 and the back surface of the movable base 21, respectively. It is always pulled in the direction of the fixed columns 27a and 28a by springs 29 and 30 provided between the fixed columns 27b and 28b. On the other hand, blocks 31 and 32 are placed on the back surface of the moving table 21, and the upper ends 31b and 32b are arranged so that the V groove 31a of the block 31 and the flat surface 32a of the block 32 are perpendicular to the back surface of the moving table 21. has been fixed. In addition, the oak fixed to the fixed base 24) 33.
34 are provided with screws 35 and 38 that are parallel to each other and engage with each other, and each screw has a hemispherically formed tip 35a, 3.
6a abut against the V-groove 31a and flat surface 32a of the block, respectively, and prevent the movement of the movable table.

Therefore, by rotating the screws 35 and 36, the respective tips 35a
, 36a in the same direction by the same length, the moving table 21 will perform a translational movement, and if only one screw 36 is rotated, the moving table 21 will rotate around the center of the sphere of the hemispherical tip 35m of the screw 35. In this way, it performs rotational motion around the center.
By rotating the screws 35° and 36, the movable table 21 can be minutely rotated or translated.

In this case, the guides 25 and 28 are provided to allow the moving platform 21 to move smoothly on one plane, and can have any structure. Further, the V-groove 31a of the block 31 may be a spherical groove that engages with the hemispherical portion 35a at the tip of the screw 35.

Note that instead of the V groove 31a of the block 31 and the hemispherical tip 35a of the screw 35, a vertical shaft may be provided on the block 31, and a bearing fitted to the tip of the screw 35 may be engaged with the vertical shaft. It can also be a structure. In short, the block 31 is received using the tip of the screw 35 as a fulcrum, and the screw 3
It is sufficient that the movable table 21 can be finely rotated about the above-mentioned fulcrum by the adjustment in step 6.

Next, FIGS. 3(a) and 3(b) are a perspective view and a plan view showing an embodiment in which a fixing device for the moving table 21 is added to the apparatus shown in FIG. 2. For simplicity, FIG. 3(a) shows guides 25, 26, fixed columns 27a, 27b,
Descriptions of 28a, 28b and springs 29 and 30 are omitted.

In this embodiment, nuts 33 and 34 are mounted on the fixed base 24, respectively.
A nut 41.42 is attached to the opposite side of the block 31.3, and a screw 43.44 engaged with the nut 43.42 is provided, so that the hemispherical tips 43a and 44a of the screw 43.44 are connected to the block 31.3.
Make sure to press the back side of 2. That is, screw 35.3
After adjusting the position of the moving table 21 by rotating screw 6,
3. Rotate 44 and press each tip against the back of blocks 31 and 32, and then tighten blocks 31 and 32 with screws 35 and 43.
Fix with scissors between 6 and 44. In this way, the movable table 21 is fixed at a predetermined position.

In addition, as a fixing device, a hole in the movable table 21,
It is also possible to use means such as machining screws on the fixing base 24 and fixing them with bolts.

In this way, the present invention provides a movable base that is movably held on one plane by a guide provided on a fixed base, and a
and the first screws 35 and 36, which are held movably in parallel to each other by fine movement devices provided on the fixed base. a second rod; and the first rod. First and second receiving parts and spring 29.30
As in the above 1. The second receiving part is the first receiving part. means for applying a driving force to the movable table so as to be pressed against each tip of the second rod, and a fulcrum is formed between the tip of the first rod and the first receiving part, The tip of the second rod and the second receiving portion are configured to be slidable relative to each other, and the main idea is to allow the movable table to perform rotational movement and translational movement.

〔Effect of the invention〕

As explained above, in the present invention, the rotational movement and the translational movement are performed by a common mechanism, and thereby the following advantages can be obtained.

(1) Since the same mechanism is commonly used for rotation and translation, the height of the entire device can be reduced, making it extremely compact.

(2) Since rotational movement and translational movement are performed by rotating the screws 35 and 36, adjustment can be easily performed.

(3) The number of parts is small, assembly is easy, there is no risk of failure, and the structure is inexpensive.

Furthermore, by adding a moving device in the vertical direction to the device according to the present invention, a three-dimensional moving device can be obtained, and the device according to the present invention can be stacked in multiple stages to create a device with a large degree of freedom. .

[Brief explanation of drawings]

Figure 1 is a perspective view showing an example of a conventional moving device, and Figure 2 (
FIGS. 3A and 3B are a perspective view and a plan view showing an embodiment of the present invention, and FIGS. 3A and 3B are a perspective view and a plan view showing an embodiment in which a moving table fixing device is further added. . 21...Moving table, 24...Fixed table, 25.26...
・Guide, 27a, 27b, 28a, 28b... Fixed column, 29.30... Spring, 31.32... Block, 31a... V groove, 32a... Plane, 33, 34,
41°42... Natsu, 35.36, 43.44...
・Screws, 35a, 36a...tips.

Claims (1)

[Claims] A movable table is held movably on one plane by a guide provided on the fixed table, and a first movable table is held movably in each axial direction parallel to each other by fine movement devices provided on the fixed table. a second rod; and the first rod. A first rod is provided on the movable table corresponding to each tip of the second rod. a second receiving part; and the first receiving part. The second receiving part is the first receiving part. a means for applying a driving force to the movable table so as to press the second rod tip, a fulcrum is formed between the first rod tip and the first receiving part, and a fulcrum is formed between the first rod tip and the first receiving part; A moving device characterized in that the rod tip and the second receiving portion are configured to be slidable relative to each other.