JPH0323524Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field of the Invention) The present invention relates to a fine movement device for finely moving the telescope or main body of a surveying instrument.

(Background of the invention) The fine movement device of conventional surveying instruments consists of a tightening knob that tightens a tightening ring to the rotating shaft of a telescope, etc., and a triggering knob that slightly rotates the tightening ring tightened to this rotating shaft around the rotating shaft. Some had the tightening knob and the fine adjustment knob placed at the same time. The former has the advantage that the tightening knob and the fine adjustment knob are separate, so once you get used to the operation, you won't make the mistake of using the knob, but the disadvantage is that the knobs are in different positions, making it difficult to operate. On the other hand, the latter has the disadvantage of being difficult to use for workers accustomed to the former, but has the advantage of being easy to operate once accustomed to it.

Therefore, in recent years, an increasing number of surveying instruments are adopting the latter type of fine movement device, with emphasis on operability. However, in order to increase the strength of the latter fine movement device, it is necessary to increase the shaft diameter, but if this point is emphasized, the surveying instrument will become larger, going against the recent trend of aiming for smaller surveying instruments. You end up doing it.

(Purpose of the invention) An object of the invention is to provide a fine movement device that has sufficient strength and does not increase the size of a surveying instrument.

(Summary of the invention) In the present invention, the male screw portion 2a of the fine adjustment shaft 2, which has the fine adjustment knob 1 fixed to one end and the pressing member 4 fixed to the other end, is screwed into the female screw ring 9 of the device main body 6, and the pressing member 4 and an elastic pressing member 5 provided on the device main body 6,
7 and 8 sandwich the protrusion 3a of the tightening ring 3 surrounding the rotating shaft 25, and the tightening knob 10 is fitted into the internally threaded ring 9 adjacent to the fine adjustment knob 1 so as to rotate, The rotating shaft 25 is connected to the tightening ring 3
In order to tighten the tension, a pressing means 24 that is pressed against the rotating shaft 25 is disposed on the protrusion 3a, and a universal joint means 1 is mounted parallel to the fine movement shaft 2.
4, 14', 15, 16, 17, 18, 19, 2
0, and the rotation of the tightening knob 10 is controlled by the universal joint means 14, 14', 15,
16, 17, 18, 19, 20 are connected to the tightening knob 10 and the universal joint means 14, 14', 15,
16, 17, 18, 19, 20, and the universal joint means 14, 1
4', 15, 16, 17, 18, 19, 20 conversion transmission means 19 for converting the rotation in the direction of moving the pressing means 24 and transmitting it to the pressing means 24;
21, 22, 23 are connected to the universal joint means 14, 14', 15, 16, 17, 18, 1
This is a fine movement device of a surveying instrument provided between 9, 20 and the pressing means 24.

(Example) The present invention will be described below based on the example shown in the drawings.

Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 is a plan view of an embodiment of the present invention by rotating the horizontal scale disc of a surveying instrument. FIG. 3 is a diagram showing the arrangement of two fine movement devices when used for the purpose of

The fine adjustment knob 1 is fixed to one end of a fine adjustment shaft 2, and a pressing member 4 is fixed to the other end of the fine adjustment shaft 2 for pressing a tightening ring 3 surrounding the rotating shaft 25 in the counterclockwise direction. The tightening ring 3 is provided with a protruding part 3a, and a pin 5 that clamps the protruding part 3a together with the pressing member 4 is inserted into a spring case 7 fixed to the device body 6 so that the protruding part 3a is always pressed against the pressing member 4. It is pressed by a spring 8. A male threaded portion 2a is formed in the middle of the fine movement shaft 2, and this male threaded portion 2a is screwed into a female threaded portion 9a formed on a female threaded ring 9 integral with the main body 6 of the device. Fine movement knob 1
A tightening knob 10 is provided between the flange of the internally threaded ring 9 and
is rotatably provided on the outer periphery of the female threaded ring 9. A toothed wheel 11 is formed integrally with the tightening knob 10 and rotates around the outer circumference of the female threaded ring 9. gear wheel 1
A pinion 12 meshes with the pinion 1, and a shaft 13 of the pinion 12 meshes with the pinion 1.
passes through the collar of the female threaded ring 9. One support member 14 of a universal joint is screwed and fixed to the threaded portion at the tip of the shaft 13. The support member 14 has a universal joint connecting rod 1.
A hole is formed in which a ball 16 formed at one end of the support member 13 slides, and a pin 17 penetrating through the ball 16 is fitted into the groove 14' of the support member 13 in order to transmit the rotation of the support member 14. . The connecting rod 15 is the fine movement shaft 2
The other support member 19 extends parallel to the flange 3a of the tightening ring 3, has a ball 18 formed at the other end, and has a hole for slidably supporting the ball 18. There is. A pin 20 passes through the ball portion 18 in a direction perpendicular to the pin 16, and a support member 19
It fits into the groove (not shown). The other end of the transmission rod 21 that is in contact with the tip of the support member 19 is connected to the collar portion 3a.
The L-shaped metal fitting 23 (see FIG. 1) is in contact with one piece of the L-shaped metal fitting 23, which is rotated by the rotating shaft 22 of the L-shaped metal fitting 23, and the other piece of the L-shaped metal fitting 23 is in contact with the pressing rod 24. The pressing rod 24 penetrates the collar portion 3a and presses a friction member 26 that presses the rotating member 25.

The above-mentioned transmission rod 21, rotating shaft 22, L-shaped hardware 23, pressing rod 24, and friction member 26 serve as a pressing means, and the small gear 12, shaft 13, supporting member 14, connecting rod 15, ball portion 16, The pin 17, the ball portion 18, the support member 19, and the pin 20 constitute a universal joint means.

Note that the pin 27 of the fine adjustment shaft 2 is for preventing the fine adjustment shaft from coming off.

Because of this configuration, in Figure 2,
When the tightening knob 10 is rotated clockwise, the gear wheel 11 rotates, and the small gear 12, shaft 13, support member 14, and pin 1 are rotated.
7. The rotation is transmitted to the connecting rod 15, pin 20, and support member 19, and the support member 19 moves leftward while rotating relative to the protrusion 3a. The transmission rod 21 is pushed to the left by the support member 19, and the L-shaped hardware 23 rotates about the rotating shaft 22 shown in FIG. Therefore, the L-shaped hardware 23 pushes up the pressing rod 24, and the friction member 26 integrates the tightening ring 3 with the rotating member 25. When the fine movement handle 1 is rotated clockwise in this state, the fine movement shaft 2 moves to the left, and the pressing member 4 resists the force of the spring 8 to slightly move the tightening ring 3 to the right (clockwise). At this time, the ball portions 16 and 18 of the universal joint slide within the support members 14 and 19 and follow the change in the distance between the support members 14 and 19. If the tightening knob 10 is rotated counterclockwise from this state, the transmission rod 21 moves to the right, and the tightening ring 3 and the rotating member 25 are separated. The same applies to the case where the rotating member 25 is slightly moved to the left.

In this way, even if the fine adjustment knob 1 and the tightening knob 10 are arranged coaxially, since the fine adjustment shaft 2 and the universal joint means are arranged in parallel, rotation transmission for tightening around the fine adjustment shaft is not possible. Compared to a device with additional members, it only expands in one direction, which increases the degree of freedom in spatial usage. Good operability can be obtained without increasing the size. Further, in the embodiment described above, a large tightening force can be obtained by the gear wheel 11 and the small gear 12. In addition, a larger tightening force can be obtained by adjusting the ratio of each side of the L-shaped hardware 23.

FIG. 3 will be briefly described below. A rotating member 61 that fits around the outer periphery of the vertical shaft 60 of the device main body 6 and rotates.
The holding member 29 of the horizontal scale disc 28 is fitted onto the outer periphery of the horizontal scale disc 28 and rotates. A ring-shaped transparent plate 30 is attached to the horizontal scale disk 28 to prevent dust from adhering to the scale. The fine movement device is provided between the device main body 6 and the holding member 29 and between the holding member 29 and the rotating member 61. The latter is identified by attaching a dash. The purpose of the figure is to show the position and arrangement of the fine adjustment knob 1 and the tightening knob 10, so the mechanism is not necessarily shown accurately. Note that members corresponding to those shown in FIGS. 1 and 2 are given the same reference numerals. In FIG. 3, the fine movement device between the main body 6 and the holding member 29 is arranged so that the connecting rod 15 is below the fine movement shaft 2, and the fine movement device between the holding member 29 and the rotating member 61 is arranged so that the connecting rod 15 is located below the fine movement shaft 2. 15 is arranged above the fine movement shaft 2. That is, the connecting rods 15 are provided in such a direction that they face each other. Therefore, the horizontal scale disk 28 can be disposed close to the fine movement shaft 2 (upper fine movement device), and the rotating member 6
1 can be disposed close to the fine movement shaft 2 (lower fine movement device), the height of the surveying instrument can be lowered, and the outer diameters of the device main body 6 and the rotating member 61 can be reduced. Effective use of space can be achieved.

Here, when the tightening knob 10 of the upper fine adjustment device is turned clockwise to tighten, the tightening ring 3 is integrated with the holding member 29, and when the fine adjustment knob 1 is turned clockwise, the holding member 29 is rotated by the fitting surface l ₂ . do. Next, when the tightening knob 10' is rotated clockwise to tighten, the fine adjustment knob 1 is rotated clockwise, so that the holding member 29 and the rotating member 61 are rotated by the fitting surface _l1 .

(Effects of the Invention) As described above, according to the present invention, it is possible to obtain a fine movement device that can measure effective space utilization while maintaining necessary and sufficient strength, thereby contributing to miniaturization of surveying instruments.

[Brief explanation of drawings]

Fig. 1 is a plan view of an embodiment of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 is a plan view of an embodiment of the present invention by rotating the horizontal scale disc of a surveying instrument. FIG. 3 is a diagram showing the arrangement of two fine movement devices when used for the purpose of Explanation of symbols of main parts, 1...Fine movement knob, 2
... Fine movement shaft, 3 ... Tightening ring, 4 ... Pressing member, 5
...Pin, 7...Spring case, 8...Spring, 10
... Tightening knob, 11 ... Gear wheel, 12 ... Small gear, 13 ... Shaft, 14 ... Support member, 15 ... Connection rod, 19 ... Support member, 21 ... Transmission rod, 23
...L-shaped hardware, 24...pressing rod, 26...friction member.

Claims (1)

[Scope of utility model registration request] The male screw part of the fine adjustment shaft, which has a fine adjustment knob fixed to one end and a pressing member fixed to the other end, is screwed into the female screw ring of the device main body, and the rotation shaft is surrounded by the pressing member and the elastic pressing member provided in the device main body. In order to clamp the protrusion of the tightening ring, a tightening knob is fitted into the female threaded ring adjacent to the fine adjustment knob so as to rotate, and tighten the rotating shaft to the tightening ring,
A pressing means to be pressed by the rotating shaft is disposed on the protrusion, a universal joint means is disposed parallel to the fine movement shaft, and a transmitting means for transmitting rotation of the tightening knob to the universal joint means. A conversion transmission means is provided between the tightening knob and the universal joint means, and converts the rotation of the universal joint means in a direction of moving the pressing means and transmits the same to the pressing means. and said pressing means.