JP2002148216A - Sample table apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the danger that a table separates up and eliminate the use of a strong tension spring. SOLUTION: There is provided a sample table apparatus which includes a table 22, a base 21, an oscillation bearing for supporting the table in a manner to freely oscillate about an X axis and a Y axis centering an intersection of the X axis and the Y axis as an oscillation center O, a spring 15 for urging the table in one direction about each of the X axis and the Y axis, and an adjusting screw 8 for oscillating the table in the other direction about each of the X axis and the Y axis against the spring thereby adjusting an oscillation angle of the table. The oscillation bearing is constituted of a self-aligning ball bearing 24. An outer ring 24a of the self-aligning ball bearing 24 is fixed to the table 22, and moreover an inner ring 24c is fixed to a support shaft 25 erect to the base 21. A hitting point of a leading end ball 9 of the adjusting screw 8 to the table 22 is set on an X-Y plane to be equal in height to the oscillation center O.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sample table device (sample table) used for an X-ray diffraction device or the like.

[0002]

2. Description of the Related Art FIG. 3 shows the appearance of a sample table apparatus of this kind. The sample table device incorporates, for example, an adjustment mechanism for adjusting the surface of the sample horizontally (adjustment). In this case, it is necessary that the table 2 on which the sample 3 is placed can be rotated about ± 2 degrees about two orthogonal axes, that is, about the X axis and the Y axis.

In the apparatus of FIG. 3, 1 is a base,
A table 2 on which a sample 3 is placed is arranged on the base 1. The table 2 is in the XY plane, and is swingably supported around the X axis and the Y axis with the intersection of the X axis and the Y axis as the swing center. Then, the table 2 can be rotated around the X axis by turning the adjustment screw 8 'arranged at the position of the Y axis, and the table 2 can be rotated Y by rotating the adjustment screw 8 arranged at the position of the X axis. It can be rotated around its axis. Table 2
Is prevented from turning to the right or left by two sets of guide plates 11 and guide pins 12. Reference numeral 17 denotes a clamp screw for stably fixing the table 2 after the tilt adjustment.

FIG. 4 is a sectional view showing details of a swing support mechanism of a conventional sample table apparatus. In this sample table device, a pivot type swing bearing is provided at the swing center of the table 2. That is, the spherical body 4 is arranged at the center of swinging, and this spherical body 4 is conical surface 5a of the seat 5 on the base 1 side.
And a bearing having a structure sandwiched between the conical surface 6a of the seat 6 on the table 2 side. As means for adjusting the swing angle of the table 2, for each of the X axis and the Y axis,
A set of a tension spring 15 and an adjusting screw 8 is provided.

A tension spring 15 and an adjusting screw 8 are provided between the table 2 and the base 1.
In the above, the table 2 is urged clockwise, and the adjusting screw 8 swings the table 2 counterclockwise against the spring 15 to adjust the swing angle of the table 2. In this case, the adjusting screw 8 is screwed into the screw hole 7 on the base 1 side at a position away from the center of swinging of the base end, so that the tip ball 9
The height of the tip 2 can be adjusted, and the tip ball 9 is pressed into contact with the contact portion 10 on the table 1 side, so that the table 2 can be moved by an appropriate angle according to the height of the tip ball 9. It can be swung against Since the adjustment screw 8 is located at a position inside the outer peripheral edge of the table 2, the adjusting screw 8 is provided with a disk 8 a with a knurl so that it can be rotated from the outside.

[0006]

In the above-mentioned conventional sample table apparatus, the table 2 is provided by a pivot bearing.
Therefore, there is a problem that when an upward force is applied to the table 2, the table 2 easily comes off. Further, when the table 2 is turned downward, the weight of the table 2 itself and the weight of the sample 3 act on the tension spring 15, so that it is necessary to use a strong tension spring 15.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sample table apparatus which eliminates the possibility of the table coming off and eliminates the need for using a strong tension spring.

[0008]

According to the first aspect of the present invention, when two axes orthogonal to each other are an X axis and a Y axis and a plane including both the X axis and the Y axis is an XY plane, A table disposed in a plane, a base disposed below the table, and a table provided between the base and the table.
A rocking bearing that supports the table so that it can swing about the X axis and the Y axis around the intersection of the axis and the Y axis, and a spring that biases the table in one direction about the X axis and about the Y axis. And an adjusting screw for adjusting the swing angle of the table by swinging the table in the other directions around the X axis and the Y axis against the spring. The bearing is constituted by a self-aligning bearing whose rotation axis is oriented in a direction orthogonal to the XY plane, and an outer ring and an inner ring of the self-aligning bearing are fixed to the table and the base, respectively. .

In this sample table apparatus, a self-aligning bearing is used as the oscillating bearing, and the outer ring and the inner ring are fixed to the table and the base, respectively, so that the table can be reliably supported and the upward force can be reduced. The table does not come off even if it hangs. In addition, since the weight of the table and the sample is handled by the self-aligning bearing, the spring may be given a strength sufficient to give a reaction force to the adjusting screw.

According to a second aspect of the present invention, in the first aspect, the base end of the adjusting screw is screwed into a screw hole on the base side at a position distant from the swing center, so that the distal end ball of the adjusting screw is screwed. The height can be adjusted, and the tip sphere is brought into press contact with the contact surface on the table side, so that the table can be swung according to the height of the tip sphere, and the contact surface with which the tip sphere contacts. The height is set on the same XY plane as the swing center.

In this sample table apparatus, when the swing adjustment is performed on one axis, the influence is not exerted on the other axis. Therefore, adjustment of each axis is facilitated, and quick and accurate adjustment is possible.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a main part of a sample table apparatus according to an embodiment. Since the overall appearance is the same as that of FIG. 3, the same components as those of the apparatus of FIG.

In FIG. 1, 21 is a base, and 22 is a table thereon. As shown in FIG. 3, the table 22 has two axes orthogonal to each other as an X axis and a Y axis, and a plane including both the X axis and the Y axis as an XY plane. Are arranged. The table 22 is supported so as to be swingable around the X axis and the Y axis around the intersection of the X axis and the Y axis as a swing center, and as a swing bearing for swingably supporting the table 22 as described above. A commercially available self-aligning ball bearing 24 capable of swinging about ± 3 degrees is employed.
Therefore, the swing center of the table 22 (the intersection of the X axis and the Y axis)
And the swing center O of the self-aligning ball bearing 24 coincides. It should be noted that although a self-aligning roller bearing can be used in principle, a small-sized general-purpose product is difficult to obtain, so a self-aligning ball bearing is used here. In addition,
Spherical bearings usually used for such purposes do not have high precision, and it is difficult to use them for tables for X-ray diffraction devices that require high precision.

In the center of the table 22, a bearing mounting hole 23 is provided.
The outer ring 24a of the self-aligning ball bearing 24 is fitted and fixed in the bearing mounting hole 23. Base 21
A support shaft 25 is provided upright at the center of the shaft, and an inner ring 24c of a self-aligning ball bearing 24 is fitted and fixed to an upper end thereof. Thus, the table 22 is securely supported by the support shaft 25 erected on the base 21 via the self-aligning ball bearing 24. In the self-aligning ball bearing 24, the raceway surface of the outer ring 24a is spherical, the inner ring 24c, the ball 24b, and a cage (not shown).
Can be freely tilted with respect to the outer ring 24a. By being attached as described above, the table 22 is swung while its own rotation axis is directed in a direction orthogonal to the XY plane. It is freely supported.

As means for adjusting the swing angle of the table 22, a set of a tension spring 15 and an adjusting screw 8 is provided for each of the X axis and the Y axis. Tension spring 15
1 and the adjusting screw 8 are provided between the table 22 and the base 21.
Is adjusted clockwise, and the adjustment screw 8 swings the table 22 counterclockwise against the spring 15 to adjust the swing angle of the table 22. In this case, the adjusting screw 8
The base 21 at a position away from the center of swing
The height of the tip ball 9 can be adjusted by screwing the tip ball 9 into the screw hole 7 on the side of the table 21. According to the height of the table 9, the table 22 can be swung by an appropriate angle against the spring 15. Note that the table 22 may be urged clockwise by the compression spring 35 instead of the extension spring 15.

What is important here is that the height of the contact point between the tip ball 9 of the adjusting screw 8 and the abutting portion 10 is adjusted by the self-aligning ball bearing 24.
Is set on the same XY plane as the swing center O. That is, the contact point between the tip ball 9 and the contact portion 10 and the swing center O of the self-aligning ball bearing 24 are on the straight line L in the XY plane shown in FIG. .

Next, the operation will be described. In this sample table apparatus, similarly to the conventional apparatus, the table 22 can be rotated around the X-axis by turning the adjustment screw 8 disposed at the Y-axis position, and the adjustment screw disposed at the X-axis position. By turning 8, the table 22 can be rotated around the Y axis. At this time, the height of the contact point between the tip ball 9 of the adjusting screw 8 and the contact portion 10 is set to be equal to the height of the swing center O of the self-aligning ball bearing 24. When the adjustment is made, the adjustment of the other axis is not affected. This point will be described with reference to FIG.

FIG. 2A is a view showing the principle of adjustment of the sample table apparatus of the present embodiment. In this case, a plate P rotatable about two axes X and Y passing through point O which is a swing center.
(Corresponding to the table 22) by Sx and Sy on the X axis and the Y axis.
Will be pressed at two points.

First, when the point Sx is pressed, the plate P rotates around the Y axis and tilts. However, since the relationship between the Y axis and the Sy point does not change, the next time the Sy point is pressed, the plate P only rotates around the X axis and does not move with respect to the Y axis.

On the other hand, when the thickness of the plate P is t, Sx, Sy
Consider the case where the point is separated from the XY plane by t. In this case, if the plate P is tilted by θ by pressing the Sx point, the Sy point must also be rotated by θ to become Sy ′. However, if it is pushed at the original Sy point, X
Since the left side is pushed by a, the plate P rotates about the X axis and also rotates about the Y axis. As described above, if there is a difference between the points Sx and Sy to be pushed up and the height of the swing center O (the thickness t of the plate is equivalent in this example), the adjustment on the X axis will affect the Y axis. It can be seen that it occurs.

On the other hand, the height of the push-up point (the point of contact between the tip ball 9 of the adjusting screw 8 and the contact portion 10) is set on the same XY plane as the swing center O of the self-aligning ball bearing 24. In the case of the apparatus according to this embodiment, the tilt of the table 22 can be adjusted for each axis without affecting other axes. Therefore, the adjustment is easy, and the adjustment can be quickly and accurately performed.

Further, in the case of this sample table apparatus, since the table 22 is supported by the self-aligning ball bearing 24, even if an upward force acts on the table 22, the table 22 does not come off and is easy to handle. . Table 2
2 and the load of the sample are all received by the self-aligning ball bearings 22, so that they can be used sideways or downwards.
There is no need to adopt a powerful one. In some cases, the use of a compression spring 35 is also possible.

[0023]

As described above, according to the first aspect of the present invention, since the self-aligning bearing is used as the bearing for swingably supporting the table, the table can be raised even when an upward force acts. There is no need to worry about the table coming off easily, and the table can be used sideways or down. Further, since the force for supporting the table is borne by the self-aligning ball bearing, there is no need to expect the force for supporting the table from the tension spring, and it is not necessary to employ a strong tension spring. Further, a compression spring can be used instead of the tension spring.

According to the second aspect of the present invention, the point at which the table is pushed up by the adjustment screw and the height of the swing center of the table are made to coincide with each other, so that when one axis is adjusted, the other axis is affected. And adjustment can be done easily, accurately and quickly.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a sample table device according to an embodiment of the present invention.

FIG. 2A is a diagram illustrating the principle of adjustment of the sample table device according to the embodiment, and FIG. 2B is a diagram illustrating a comparative example thereof.

FIG. 3 is an external perspective view of this type of sample table device.

FIG. 4 is a cross-sectional view showing a main part configuration of a conventional sample table device.

[Explanation of symbols]

 O Oscillating center 8 Adjusting screw 9 Tip ball 15 Extension spring 21 Base 22 Table 24 Self-aligning ball bearing 35 Compression spring

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2G001 AA01 BA18 CA01 GA13 JA08 JA12 PA12 5C001 AA03 AA05 CC05

Claims (2)

[Claims] 1. An X-axis and a Y-axis, which are two axes orthogonal to each other,
When a plane including both the X axis and the Y axis is an XY plane, X
A table disposed in the Y plane, a base disposed below the table, and a base provided between the base and the table. A rocking bearing that supports the table so as to be swingable about the Y axis, a spring that urges the table in each direction about the X axis and about the Y axis, and a table that rotates the table around the X axis against the spring; And an adjusting screw for adjusting the swing angle of the table by swinging in each of the other directions around the Y axis. In the sample table apparatus, the swing bearing has its own rotation axis orthogonal to the XY plane. A sample table device comprising a self-aligning bearing oriented in a direction, wherein an outer ring and an inner ring of the self-aligning bearing are fixed to the table and the base, respectively. 2. The height of the tip ball of the adjusting screw can be adjusted by screwing the base end of the adjusting screw into a screw hole on the base side at a position distant from the swing center. Is brought into press contact with the contact surface on the table side, so that the table can be swung according to the height of the tip sphere, and the height of the abutment surface that the tip sphere contacts is the same as the swing center. 2. The sample table apparatus according to claim 1, wherein the sample table apparatus is set on an XY plane.