JPH0134150Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a rotating shaft fine movement device for optical machines such as surveying instruments and optical indexing devices, and in particular, a tensioning device in which a rotating shaft tensioning shaft and a fine movement feed shaft are coaxially arranged. This relates to a rotary shaft fine movement device equipped with a rotary shaft fine movement device.

In conventional transit and light wave range finders and angle meters, the rotating shaft fine movement device that rotates the telescope or light wave range finder minutely around the horizontal or vertical axis consists of a tensioning means that tightens the tension frame to the rotating shaft, and a tensioning means that tightens the tension frame to the rotating shaft. Since the driving shaft directions of the fine movement means that slightly rotate the tension frame that is tightened to the shaft are different, the tension operation knob and the fine movement operation knob are located at different locations, which improves the operability of tension and fine movement. There was a problem that it was bad.

In order to solve the above-mentioned problems, this invention provides a rotating shaft fine adjustment device that integrates a tensioning knob and a fine adjustment knob, which have a coaxial structure in which the outer shaft is used for tensioning and the inner shaft is used for fine adjustment. .

An embodiment of this invention will be described below using an example of an elevation angle fine movement device for a light wave rangefinder/goniometer, but this invention is not limited to this, and can also be used as a horizontal angle fine movement device. Needless to say, it can be used not only for other surveying instruments such as , transit, etc., but also for a wide range of instruments that require minute rotations of the rotation axis.

FIG. 1 is a diagram showing the tensioning frame of the rotary shaft fine adjustment device according to this invention, FIG. 2 is a diagram showing the fine adjustment feeding section, and FIG. 3 is a diagram showing the tensioning frame and the fine adjustment feeding section. FIG. 3 is an exploded perspective view for making it easier to understand the assembly relationship of each component.

The light wave distance measuring section 1 has a horizontal shaft 2, and is rotatably supported by a bearing section (not shown) of a support 3 extending from the mount section 3A. A tensioning frame 4 is fitted onto the rotating shaft 2 through a hole 5. A notch 7 is formed below the hole 5, and a tensioning piece 6 is fitted into the notch 7 so as to be slidable along the wall surface of the notch 7. A through hole 9 is formed in the arm portion 8 of the tensioning frame 4 along its longitudinal direction, and a tensioning rod 10 having a pointed head 10a at the tip can slide inside this through hole 9. is inserted into. Arm part 8
A lower flange 12 with a step is formed on the flange portion 11 formed at the tip of the pin 13.
A tension piece 14 is rotatably attached. The upper surface of this tensioning piece 14 is in contact with the lower end of the aforementioned tensioning rod 10. In addition, the lower flange 12 has a shaft hole 1.
A bearing portion 15 having a diameter 5a is formed, and a pin 16 is further implanted on the side opposite to the tension rod 10. On the other hand, one end of a spring 18 for always pulling the tension frame 4 in one direction is locked in the hole 17 formed above the flange 11, and the other end of this spring 18 is locked in the hole 17 formed above the flange 11. It is locked to member 19.

In the shaft hole 15a, there is an eccentric cam rotating member 2, which includes a circular tubular shaft 22 and a disc 21 having projecting pieces 20a, 20b disposed in front thereof in a direction perpendicular to the rotating shaft 19.
No. 3 circular tubular shaft 22 is rotatably fitted.
An eccentric cam 42 is fixed to this shaft 22. The eccentric cam 42 is in contact with the lower curved surface 14a of the tension piece 14. The protruding pieces 20a, 20b have a first groove 24 extending rearward in a direction perpendicular to the rotating shaft 19.
and a hollow slide tube 2 having a second groove 25 running in a direction perpendicular to the first groove 24 at the front.
6 is engaged by its first groove 24 so as to be slidable in the groove direction.

The tensioning operation shaft 30 is a hollow shaft integrally formed with a disc 28 having protruding pieces 27a, 27b (27b not shown) in a direction perpendicular to the arrangement direction of the protruding pieces 20a, 20b of the eccentric cam rotation member 23. A female threaded portion 29 is formed on the inner surface of the shaft. The protruding pieces 27a and 27b of the tensioning operation shaft 30 are connected to the second part of the slide tube 26.
It is slidably engaged with the groove 25. That is,
These eccentric cam rotating member 23, slide tube 26,
The tension operation shaft 30 constitutes an Oldham joint.

A tension knob 31 having a hollow shaft 31a is fitted and fixed to the outer peripheral end of the tension operation shaft 30. The tension operation shaft 30 is rotatably fitted into a bearing 41 fixed to the support column 3 with a screw 40.

On the other hand, the fine adjustment shaft 35 has a male threaded portion 32, a fine adjustment knob 33 at its rear end, and a push pin 34 loosely inserted into a tubular portion 35a at the opposite end of the fine adjustment knob 33. The fine movement shaft 35 passes through each of the aforementioned bearing 15a, the eccentric cam rotating member 23, the slide tube 26, and the tensioning operation shaft 30, and the male threaded portion 32 is screwed into the female threaded portion 29 of the tensioning operation shaft 30. has been done. The push pin 34 is in contact with a recess 37 formed in one end of an L-shaped lever 36 which is rotatably held in the column 3 by support means (not shown) with a vertical direction as a rotation axis. The other end 38 of the lever 36 is in contact with the side surface of the pin 16 implanted on the lower surface of the lower flange 12 mentioned above.

Next, the operation of this embodiment during the tightening fine movement operation will be explained.

First, the tensioning knob 31 is rotated to rotate the eccentric cam 42, and the tensioning piece 14 in contact with the eccentric cam 42 is rotated.
Push up the tension bar 10 and tighten the tension frame 4 by the tension piece 6.
is attached to the horizontal shaft 2. Next, fine movement knob 33
When the lever 36 is rotated and the fine movement shaft 32 is advanced by screw feeding, the lever 36 is rotated by the push pin 34.
Rotation of lever 36 causes movement of pin 16,
As a result, the tension frame 4 is rotated against the tension of the spring 18. Therefore, the horizontal axis 2 is rotated about the axis, thereby slightly rotating the light wave distance measuring section about the horizontal axis.

Here, the tensioning operation shaft 30 and the fine movement shaft 35 are coaxial and fixed to the support column 3, and the rotation of the tensioning frame 4 causes the eccentric cam rotation member 23 to rotate in the circumferential direction along the rotational direction of the tensioning frame 4. receive the power of However, since the eccentric cam rotating member 23 and the tension operation shaft 30 have an Oldham joint structure through the slide tube 26, the force in the circumferential direction does not interfere with the tension operation shaft 30 at all. .

As described above, according to the present invention, it is possible to provide a rotary shaft fine adjustment device with excellent operability that allows the coaxial type knobs of the tensioning outer shaft and the fine adjustment inner shaft to be operated at the same position without having to repeatedly search for them. I can do it.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the tension frame portion of the rotating shaft fine adjustment device of this invention, FIG. 2 is a diagram showing an embodiment of the fine movement feeding portion of the rotation shaft fine adjustment device of this invention, and FIG. FIG. 2 is an exploded perspective view showing an embodiment of the rotating shaft fine adjustment device of this invention. 4...Tensioning frame, 6...Tensioning piece, 10...Tensioning rod, 14...Tensioning piece, 42...Eccentric cam, 23...
... Eccentric cam rotation member, 26 ... Slide tube, 30
... Tension operation shaft, 35 ... Fine movement shaft, 36 ... Lever.

Claims (1)

[Claims for Utility Model Registration] (1) A rotating shaft, a tensioning frame inserted into the rotating shaft, and the tensioning frame being pressed against the rotating shaft in a direction intersecting the rotating shaft to be tightened. a tensioning means, a tensioning drive means for driving the tensioning means, a tensioning operation means for operating the tensioning driving means, and a tensioning means coaxial with both the tensioning operation means and the tensioning driving means. and a fine movement means for rotating the tensioning frame around the rotational shaft, the rotational shaft characterized in that the tensioning drive means and the tensioning operation means are connected by an Oldham joint. Microtremor device. (2) The tensioning drive means has a moving means that moves the tensioning means in a direction in which it comes into pressure contact with the rotating shaft by the rotation of an eccentric cam that is rotated via the Oldham joint by the rotation of the tensioning operation means. A rotating shaft fine adjustment device according to claim 1 of the utility model registration claim, characterized in that: