JPH089605Y2 - Surveying instrument - Google Patents

Description

[Detailed description of the device]

[0001]

The present invention relates to a surveying instrument. More specifically, the present invention relates to a surveying instrument with good reproducibility of attaching / detaching a telescope to / from an alidade.

[0002]

2. Description of the Related Art In a conventional surveying instrument, in order to ensure the reproducibility of attachment / detachment of a telescope to / from an alidade, in order to maintain a highly accurate fit between the horizontal axis fitting portion of the telescope and the alidade horizontal axis, a so-called Precision fitting processing was performed.

In conventional surveying instruments, particularly in electronic theodolites, the elevation angle measurement is performed by a photoelectric encoder.
The photoelectric encoder is composed of a fixed movable encoder disk, an encoder index and a photoelectric detector. The encoder disk is fixed to one horizontal shaft that fits into the horizontal shaft fitting portion of the telescope. Further, when the telescope is mounted on the alidade, it is common that the horizontal shaft is disengaged from the horizontal shaft fitting portion and then mounted again. If the mutual positional relationship between the horizontal axis and the horizontal axis fitting part is not reproduced before and after attachment / detachment, surface positional deviation etc. occurs and the mutual positional relationship between the encoder disk fixed to the horizontal axis and the telescope cannot be reproduced. Therefore, the altitude angle measurement accuracy is reduced. For this reason, conventionally, in order to ensure the reproducibility of the mutual positional relationship between the encoder disk and the telescope, the fitting surface of the horizontal axis and the fitting part of the horizontal axis has been precision fitting processing.

However, the conventional precision fitting requires a high processing technique for processing parts and is expensive. Further, when assembling, the fitting surface of the component is apt to be damaged because the component which is tightly fitted is detached.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a surveying instrument which does not require precision fitting and which has a good reproducibility of attaching and detaching a telescope to and from an alidade.

[0006]

The present invention is directed to an alidade (2) and a pair of horizontal shaft bearing parts (8) of the alidade (2).
a) and (8b), respectively, a horizontal axis (6a) rotatably supported so that the inclination angle of the optical axis can be changed in the vertical plane,
Horizontal shaft fitting portions (10a) and (10) that fit into (6b)
In a surveying instrument having a telescope (1) in which b) is formed, screw holes (9c) and (9d) are radially formed in the horizontal shaft fitting portions (10a) and (10b), and Hole (9
c), screwed to (9d), and the horizontal shafts (6a), (6b)
And screws (9a) and (9b) for fixing the horizontal shaft fitting portions (10a) and (10b) to each other, and the horizontal shaft (6a),
(6b) and the horizontal shaft fitting portions (10a) and (10b) have markings (6e), (6f) and (10) for matching, respectively.
e) and (10f) are engraved, and the horizontal axes (6a) and (6
The markings (6e) and (6f) engraved on b) and the markings (10) engraved on the horizontal shaft fitting portions (10a) and (10b).
e) and (10f) so that the horizontal axis (6
a), (6b) and the horizontal shaft fitting portions (10a), (10
b) is fixed by the screws (9a) and (9b), which constitutes a surveying instrument.

Further, the horizontal shaft fitting portions (10a), (10
b) A grooved notch (10 g) is axially formed at a position facing the screw holes (9 c) and (9 d) on the inner peripheral surface of the survey instrument. .

[0008]

Operation: Horizontal shafts (6a) and (6b) and horizontal shaft fitting portion (1
0a) and (10b) are engraved marks (6
After the marks e) and (6f) and the markings (10e) and (10f) match, they are removably fixed with screws (9a) and (9b).

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment according to the present invention will be described with reference to FIGS. FIG. 1 is a sectional view showing a first embodiment, and FIGS. 2 and 3 show horizontal shafts (6a) and (6b) and a horizontal shaft fitting portion (1).
0a) and (10b) are shown in cross section.

The telescope (1) for collimation has a horizontal axis (6
a), (6b) is fitted from the outside to the horizontal shaft fitting portion (10
Two a) and (10b) are provided. The alidade (2) is a rotating member that rotates about a vertical axis (not shown), and two holes (2a) and (2b) for supporting and fixing the horizontal axis bearings (8a) and (8b) are located at two opposite positions. Has been drilled. The two horizontal axes (6a) and (6b) are coaxial with each other, and the telescope (1) rotates about this axis, and is supported by the holes (2a) and (2b) of the alidade (2). The horizontal shaft bearings (8a) and (8b) are pivotally supported. This rotation allows the tilt angle of the optical axis of the telescope to be changed within the vertical plane. Horizontal shaft fitting part (10a),
(10b) has set screws (9a) and (9b), respectively.
Set screw holes (9c) and (9d) screwed with are drilled in the radial direction. Horizontal shafts (6a), (6
b) and the horizontal shaft fitting portions (10a) and (10b) are fixed by set screws (9a) and (9b), respectively, and tightened by horizontal shaft fixing screws (7a) and (7b), respectively. There is. The encoder disk (3) is installed on the end surface of one horizontal shaft (6a) perpendicularly to the axis and with its center aligned with the axis. Then, the altitude angle is measured together with the encoder index (4) and the photoelectric detection unit (5) fixed to the alidade (2).

The horizontal axis fitting portion (10a) of the telescope (1),
As shown in FIG. 2, indicia (10e) and (10f) are formed on the surfaces (10c) and (10d) where (10b) fits into the horizontal shaft bearings (8a) and (8b), respectively. . The engraved positions are the horizontal shaft fitting portions (10a), (10
b) and the horizontal shaft bearings (8a) and (8b) may be located at any positions facing each other, but in the present embodiment, they are formed on the opposite sides of the set screw holes (9c) and (9d) on the circumference. There is.
The horizontal shafts (6a) and (6b) are the horizontal shaft bearings (8a),
Marks (6e) and (6f) are engraved on the sides (6c) and (6d) of the horizontal shaft fitting portions (10a) and (10b), respectively, which are fitted to (8b). Surface (10
c), markings (10e), (10d) engraved on (10d)
f) and the markings (6) on the surfaces (6c) and (6d)
e) and (6f) are signs of each other.

Next, the fitting between the horizontal shafts (6a) and (6b) and the horizontal shaft fitting portions (10a) and (10b) will be described. In FIGS. 2A, 2B and 3, the horizontal axis (6
The horizontal shaft fitting portion (10a) is fitted to (a) from the outside. The fitting of the horizontal shaft (6b) and the horizontal shaft fitting portion (10b) is the same and the description thereof is omitted. Horizontal axis (6
The diameter of a) is smaller than the diameter of the horizontal shaft fitting portion (10a), so that the horizontal shaft (6a) has a horizontal shaft fitting portion (10a).
However, the center (O) of the horizontal shaft (6a) does not coincide with the center (O ') of the horizontal shaft fitting portion (10a). When inscribed, the horizontal shaft (6a) is rotated relative to the horizontal shaft fitting portion (10a), and the engraved mark (6) is engraved on the horizontal shaft (6a).
e) and the engraving mark (10) engraved on the horizontal shaft fitting portion (10a).
e) are matched with each other so that the mutual positions of both are kept constant. Then, by fixing with set screws (9a) after matching, it is possible to keep the difference Δa between both centers in the direction of marking matching constant with good reproducibility.

If the marking (6e) and the marking (10e) do not match or are not fixed by the set screw (9a), the horizontal shaft (6a) and the horizontal shaft fitting portion (10a) are mutually positioned. Cannot be held constant, and therefore, holding the difference Δx or Δy between the two centers shown in FIG. 3 constant means that the horizontal shaft (6a) and the horizontal shaft fitting portion (10a) are true. It is extremely difficult unless the circles have the same diameter.

Next, processing and assembly of the horizontal shafts (6a) and (6b) and the horizontal shaft fitting portions (10a) and (10b) will be described. First, the horizontal shafts (6a) and (6b) are inserted into the horizontal shaft fitting portions (10a) and (10b) of the telescope (1) at predetermined positions, and then the markings (6e) and (6f) and the markings (1) are inserted.
0e), (10f) and the horizontal axes (6a), (6
b) and the horizontal shaft fitting portions (10a) and (10b) are installed at predetermined positions in the rotating direction. Set screw (9a),
The horizontal shafts (6a) and (6b) are fixed to the horizontal shaft fitting portions (10a) and (10b) by (9b). Further, the horizontal shaft fixing screws (7a) and (7b) are tightened.

Next, after the horizontal shafts (6a) and (6b) are clamped to the horizontal shaft fitting portions (10a) and (10b) of the telescope (1) to be integrated, the integrated shafts are used as shafts. The end face of one horizontal shaft (6a) which rotates around the center and installs the encoder index (3) is machined into a plane perpendicular to the shaft.

The horizontal axis fitting portion (10a) of the telescope (1),
The horizontal axes (6a) and (6b) are separated from (10b). The horizontal shaft bearing (8) supporting the telescope (1) in the opposite holes (2a) and (2b) of the alidade (2).
It is installed between a) and (8b), and horizontal axes (6a) and (6
b) through the horizontal shaft bearings (8a), (8b),
Insert into the horizontal shaft fitting portions (10a) and (10b) at predetermined positions. Then, the markings (6e), (6f) and the markings (10e),
The horizontal shafts (6a) and (6b) and the horizontal shaft fitting portions (10a) and (10b) are installed at predetermined positions in the rotational direction by matching with (10f). Set screw (9a), (9b)
The horizontal shafts (6a) and (6b) by the horizontal shaft fitting portion (10
It is fixed to a) and (10b). Furthermore, the horizontal axis fixing screw (7
Tighten with a) and (7b). This allows the horizontal axis (6
a), (6b) and horizontal shaft fitting parts (10a), (10b)
The mutual positional relationship with and is reproduced in the same state as before the separation.

A second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a sectional view of the horizontal shafts (6a), (6b) and the horizontal shaft fitting portions (10a), (10b) of the second embodiment.
Description of the same or similar points as in the first embodiment will be omitted. The horizontal shaft fitting parts (10a) and (10b) are engraved with (1
0e), (10f) positions, that is, set screw holes (9
c), (9d) and the notch (1
0g) is provided. The notch portion (10g) is a groove that is bored in the axial direction, and the horizontal shaft fitting portion (10a), (1
0b) is fitted with the horizontal shafts (6a), (6b) and fixed by the set screws (9a), (9b).
No contact is made at the positions (10h) and (10k) of the markings (10e) and (10f) with the marks (a) and (6b), but line contact is made at the edges (10i) and (10l) of the groove. . Horizontal axis (6a), (6
b) and the horizontal axis fitting portions (10a) and (10b) can be reciprocally secured with good reproducibility, and both centers (O) in one direction,
It is possible to keep the difference Δa of (O ′) constant with good reproducibility.

The horizontal shaft fitting portions (10a), (10b)
Has been described as being fitted to the horizontal shafts (6a) and (6b) from the outer surface side, but the same is applied to the case where the horizontal shaft fitting portion (10a) is fitted to the horizontal shaft (6a) from the inner surface side. It goes without saying that it is possible.

Conventionally, the horizontal axis fitting portion (10) of the telescope (1) is used.
In order to obtain good reproducibility when detaching the horizontal shafts (6a) and (6b) from (a) and (10b) and mounting them again, precision fitting processing that requires high technology is performed, and high technology is applied. The process in which the required attachment / detachment and assembly was performed is made possible by the ordinary technique.

[0020]

According to the present invention, the horizontal axis (6a), (6
Since the markings (6e) and (6f) and the horizontal shaft fitting portions (10a) and (10b) engraved in b) are removably and removably fixed, precise fitting is not required and the telescope A surveying instrument with good reproducibility of attaching and detaching to and from Alidade was obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment.

FIG. 2 is a cross-sectional view of a horizontal shaft and a horizontal shaft fitting portion in FIG.

FIG. 3 is a cross-sectional view of a horizontal shaft and a horizontal shaft fitting portion in FIG.

FIG. 4 is a sectional view of a horizontal shaft and a horizontal shaft fitting portion according to a second embodiment.

[Explanation of symbols]

 1 Telescope 2 Alidade 3 Encoder Disk 4 Encoder Index 5 Photoelectric Detector 6a, 6b Horizontal Axis 6e, 6f Marks 7a, 7b Horizontal Axis Fixing Screws 8a, 8b Horizontal Axis Bearings 9a, 9b Set Screws 10a, 10b Horizontal Axis Fitting 10e 10f stamp

Claims (2)

[Scope of utility model registration request] 1. An alidade and a pair of horizontal shaft bearings installed on the alidade, each of which is fitted to a horizontal shaft rotatably supported so that the inclination angle of the optical axis can be changed within a vertical plane. In a surveying instrument having a telescope having a shaft fitting portion formed therein, a screw hole is bored in the horizontal shaft fitting portion in a radial direction, and screwed into the screw hole to form the horizontal shaft and the horizontal shaft fitting. And a screw for fixing the horizontal shaft and the horizontal shaft fitting portion, and a marking for engraving is engraved on the horizontal shaft and the horizontal shaft fitting portion, respectively. The marking engraved on the horizontal shaft and the horizontal shaft fitting portion are engraved. A surveying instrument, characterized in that the horizontal shaft and the horizontal shaft fitting portion are fixed by the screw so that the markings provided are in agreement with each other. 2. A groove-shaped notch is formed in the axial direction at a position facing the screw hole on the inner peripheral surface of the horizontal shaft fitting portion. Surveyor.