JPH0134153Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a rotation axis fine movement device that minutely rotates a rotation axis (or rotation axis). This invention relates to a rotary shaft fine movement device for minute rotations around the horizontal and vertical axes of a surveying instrument such as a transit or a light wave rangefinder/angle meter that rotates to measure distance and/or angle.

In the conventional rotational shaft fine adjustment device, a tensioning means for tightening the rotational shaft is provided on the arm of the tensioning frame, and the tensioning frame is tightened on the rotational shaft by rotating the tensioning knob of this tensioning means. ing. A fine movement means having a microscrew is rotated forward and pressed from the side surface of the arm of the tensioning frame, thereby rotating the tensioning frame and thereby slightly rotating the rotating shaft.

In the case of such a conventional rotating shaft fine adjustment device,
Since the tension knob exposed outside the surveying instrument housing rotates with the rotation of the tension frame, it is necessary to form a slot hole on the housing side and pass the tension knob through this hole to prevent dirt and dust from entering. Surveying instruments, which are one of the most hated optical precision instruments, have had major dust-proofing problems.

In addition, in order to improve the operability of the fine movement means that presses the side surface of the arm of the tensioning frame, a swingable push pin is loosely inserted into the tip, and the arm is pushed through this push pin. . However, with this configuration, the push pin makes contact with the arm at a point, which causes the pressure point to wander, resulting in an error in the amount of rotation, and unreasonable force is applied to the push pin, causing damage to the push pin. It was hot.

In addition, in conventional rotating shaft fine adjustment devices, the tension knob and the fine adjustment knob are placed in different positions, so due to surveying technology, the rotation and tension of the sighting telescope and self-protractor plate must be rotated many times. Surveying instruments such as transits, light wave distance meters, and goniometers that have to be used have a problem of poor operability.

This invention was made in view of the above problems, and includes a rotating shaft, a tensioning frame that is fitted into the rotating shaft and has an arm protruding, and a tensioning frame that is provided on the arm and presses against the rotating shaft to tighten the tensioning frame. A pressure contact means for fixing the fixed frame, a tension means operated in conjunction with the pressure contact means, a fine movement means having a cylindrical tip attached through the tension means, and a fine movement means that slides on the tip of the fine movement means. By making the rotating shaft fine adjusting device consist of a spherical seat member provided on the arm through the tip of the tensioning means, it has excellent operability and solves the problems of conventional rotating shaft fine adjusting devices. The purpose of the present invention is to provide a rotating shaft fine movement device with good precision and durability.

Next, this invention will be explained based on the drawings.

FIG. 1 is a partial cross-sectional view showing a first embodiment of the rotating shaft fine adjustment device according to the invention. A tensioning frame 2 having an arm portion 3 is rotatably fitted into the rotating shaft 1 . The arm portion 3 of this tensioning frame 2 has a notch 4.
is formed, and a tensioning piece 5 is loosely fitted into this notch 4. The tensioning piece 5 is attached to a pin 7 implanted in a recessed flange 6 formed on the arm portion 3 via a triangular lever 8 and a push rod 10 rotatably attached. The push rod 10 is slidably fitted into a through hole 9 formed in the direction toward the center O of the rotation shaft 1 of the arm portion 3, and is tightened by pressing the tensioning piece 5 against the rotation shaft 1 by rotating the lever 8. Fixed quota 2 has been tightened. Further, an opening 30 is provided on one side of the arm portion 3, and a spherical seat member 13 having a spherical seat 13a is loosely fitted into this opening 30, as shown in FIG. It is desirable that this spherical seat 13a be coated with a material having a small coefficient of friction, such as Teflon. Further, on the other side of the arm portion 3, a known compression means 1 is screwed onto the housing 14.
The second piston pin 12a presses the arm portion 3 by a spring 12b.

On the other hand, a micro female screw 15 is fixed to the housing 14 by a screw 16, and a fine adjustment screw 20 is screwed into the micro female screw 15. The fine adjustment screw 20 has a cylindrical shape with a fine adjustment knob 17 formed at one end, has a micro male screw 18 formed on the outer periphery of the intermediate portion to be screwed into the micro female screw 15, and has a female screw 19 formed on the inner periphery. has been done. The tensioning screw 11 has a tensioning knob 21 at one end, a contact rod 24 at the other end, and a male thread 22 in the middle, so that the tip of the contact rod 24 passes through the fine adjustment screw 20 and comes into contact with the lever 8. It is screwed onto a female screw 19.

Next, the action will be explained.

First, when the tightening knob 21 is rotated and the male screw 22 is threaded to advance the tightening screw 11, the lever 8, which the contact rod 24 is in contact with, is rotated around the pin 7. By rotating the lever 8, the push rod 10 is moved toward the rotation center O, the tensioning piece 5 is brought into pressure contact with the rotation shaft 1, and the tension frame 2 is moved toward the rotation shaft 1.
Be nervous. This state is schematically shown in FIG. 2 by a solid line.

Next, turn the fine adjustment knob 17, and then turn the fine adjustment screw 20.
When the micro male screw 18 is screwed forward, the tip of the fine adjustment screw 20 touches the spherical seat 1 of the spherical seat member 13.
3a. When the fine adjustment screw 20 is further advanced, the tension frame 2 is rotated against the elastic force of the spring 12b of the elastic pressure means 12. At this time, since the tensioning frame 2 is tightened to the rotating shaft 1 as described above, the rotating shaft 1 is eventually rotated slightly in accordance with the amount of feed of the fine screw 20. That is, a slight rotation is made from the position indicated by the solid line in FIG. 2 to the position indicated by the two-dot chain line.

Although the spherical seat member 13 rotates around the rotation center O as the tension frame 2 rotates, the fine adjustment screw 20 always moves only in a straight line. Even if the moving directions of the two are different, the spherical seat 13a of the spherical seat member 13
This allows for easy movement. That is, since the fine adjustment screw 20 is always in contact with the spherical seat 13a of the spherical seat member 13 and is sliding on the spherical seat 13a, the fine adjustment screw 20 always moves the tension frame 2 in the linear direction (the tangential direction of the rotating shaft 1). Can be pressed.

When the fine adjustment screw 20 is further fed in, the spherical seat member 13
Since the arm itself is loosely inserted into the opening 30 of the arm section 3, the fine movement range can be made somewhat large. Fine adjustment screw 2
The tip of 0 has a cylindrical shape, the abutment surface of the tip is circular, and the spherical seat 13a of the spherical seat member 13, which is the abutted surface, has a spherical surface, so that the two completely come into contact and tighten the micro-movement pressing force. It can be transmitted to frame 2 and there is no wobbling.

In addition, the tightening screw 1 is attached to the female thread 19 of the fine adjustment screw 20.
Since the male screw 18 of 1 is screwed together, the fine adjustment screw 2
When the tension screw 11 is fed out by the same amount, the tension screw 11 also moves by the same amount, so that the tension does not loosen. Further, the contact rod 24, which is the tip of the tension screw 11, is connected to the spherical seat member 1.
However, since the diameters of the hollow portion 13b and the opening 30 are sufficiently larger than the contact rod 24 of the tensioning screw 11, the tensioning frame 2 does not rotate. Even if it does, it will not come into contact with the tip contact rod 24 of the tensioning screw 11 and will not receive any lateral force.

FIG. 3 is a partial cross-sectional view showing a second embodiment of the rotating shaft fine adjustment device of this invention. In this figure, the same components as those in the first embodiment shown in FIGS. 1 and 2 are given the same reference numerals and explanations are omitted, and the same tension screws, fine adjustment screws, etc. as in the first embodiment are Illustration is omitted.

This second embodiment has a slide member 40 that slides instead of the rotating lever 8 shown in the first embodiment.
The second embodiment is different from the first embodiment except that . This slide member 40 has a through hole 9 in the arm portion 3.
A push rod portion 41 that is inserted into and slides thereon, and a head portion 43 having an inclined surface 42 that is housed in a hollow portion formed by the recessed flange 6 of the arm portion 3 are integrally molded. A slot hole 44 that is long in the axial direction of the push rod portion 41 is bored in the head 43. The recessed flange 6 is configured such that the inclined surface 42 and the contact rod 24 are in contact with each other, and the input from the contact rod 24 is transmitted in the axial direction of the push rod portion 41, that is, in the direction of pressing the tensioning piece 5 against the rotating shaft 1. A slot hole 44 is fitted into the implanted pin 45.
Instead of the slot hole 44 and the pin 45, the through hole 9 and the push rod portion 41 may have a cross-sectional shape that does not rotate when sliding, for example, they may be rectangular, or they may be engaged by a groove and a protrusion.

The action of this embodiment is that, whereas the lever 8 of the first embodiment rotates and pushes the push rod 10 and presses the tensioning piece 5, the slide member 40 receives a force in a direction approximately perpendicular to the direction of movement and slides. The difference is that the tensioning piece 5 is pressed, but the rest is the same.

As explained above, according to this invention, compared to the conventional rotary shaft fine adjustment device, the operation knobs for tightening and fine movement are in one place, which provides excellent operability, and the tensioning and fine movement are reliable and durable. A coaxial rotating shaft fine movement device in which fine movement is provided concentrically can be provided.

Note that this invention is not limited to rotating shaft fine movement devices for surveying instruments, but is applicable to various types of devices that have a rotating shaft, such as optical indexing devices, and have the common purpose of micro-turning this rotating shaft. Of course, it can be widely used in devices in many fields.

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional view showing a first embodiment of the rotating shaft fine adjustment device of this invention, Fig. 2 is a schematic diagram illustrating the operation of the rotating shaft fine adjustment device of this invention, and Fig. 3 is a rotational shaft of this invention. FIG. 7 is a partial cross-sectional view showing a second embodiment of the shaft fine adjustment device with some of its components omitted. 1...Rotation axis, 2...Tension frame, 3...Arm, 5
... Tensioning piece, 8 ... Lever, 10 ... Push rod, 11 ... Tensioning screw, 13 ... Ball seat member, 1
7...Fine adjustment knob, 20...Fine adjustment screw, 21...
Tightening knob, 40...slide member.

Claims (1)

[Claims for Utility Model Registration] (1) A rotating shaft; a tensioning frame fitted into the rotating shaft and having an arm protruding therefrom; a pressure contact means for fixing the frame; a tensioning means operated in conjunction with the pressure contact means; a fine movement means having a cylindrical tip attached through the tensioning means; a fine movement means slidingly in contact with the tip of the fine movement means; A rotating shaft fine movement device comprising: a spherical seat member provided on the arm portion so as to pass through the distal end portion of the tightening means. (2) The rotating shaft fine adjustment device according to claim 1, wherein the tensioning means and the fine adjustment means are screwed together and arranged concentrically. (3) The rotating shaft fine adjustment device according to claim 1 or 2, wherein the spherical seat member is loosely fitted to the arm portion of the tensioning frame.