JP3008293B2 - Centripetal devices for surveying machines such as transit and theodolite - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a centering device of a surveying machine such as a transit or a theodolite having a machine center.

2. Description of the Related Art Conventionally, surveying instruments such as transit and theodolite have, as shown in FIG. 2, an objective lens as a centripetal device for setting the center of the machine (center of a vertical axis) on a vertical line of a measurement point. , A centripetal telescope with an eyepiece protruding outside from the side of the machine body was incorporated in the machine body.

When centrifuging using this centripetal telescope, the machine is first leveled, and as shown in FIG. 3, the machine is moved on a tripod head while looking through the eyepiece of the centripetal telescope protruding from the machine body. The machine was fixed when the point coincided with the reticle (crosshair) of the centripetal telescope.

When performing the above-mentioned centering, it is necessary to install the center of the tripod and the machine in advance on the approximate vertical line of the measurement. After moving the tripod and the machine so as to adjust the center and roughly centriped, the centripetal telescope described above has been used to accurately centrifuge.

"Problems to be Solved by the Invention" (1) When centriped by a centripetal telescope, it is inconvenient in actual use to mount the tripod and the machine on the approximate vertical line of the measuring point while looking through the eyepiece. It was difficult.

(2) For this reason, it is necessary to perform centripetal movement using a centripetal telescope in combination with a vertical ball. In this case, it is difficult to stabilize the vertical ball due to the influence of the wind. Each time, there is a work to remove the vertical ball,
For this reason, when surveying, there is a problem that a long time is required for a centripetal operation.

(3) Also, as shown in FIG. 2, the eyepiece of the centripetal telescope is exposed to the outside of the frame of the main body of the surveying machine, and collimation, packing,
Consideration must be given to the difficulty of carrying, the appearance, the protection from wind, rain and dust, and the like, which has been a limiting factor in design.

Means for Solving the Problems The present invention provides a centering method for aligning a measurement point on a vertical line with a vertical axis of a surveying machine having a collimating telescope set rotatably about a horizontal axis and a vertical axis. An apparatus comprising a leg supported on a tripod; a machine body supporting a collimating telescope and supported on the foot via a leveling screw; having a centripetal optical axis coinciding with a vertical axis of the surveying machine. A centripetal optical system built in the machine main body; and a visible light laser diode driven by a battery built in the machine main body and emitting monochromatic visible laser light on a centripetal optical axis of the centripetal optical system. A visible centripetal collimation line is constituted by the visible laser light.

"Example" Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. First, in the conventional example of FIGS. 2 and 3, reference numeral 1 denotes a machine main body of a surveying machine, and It is installed while maintaining the level through the quasi-screw 4. In the machine body 1,
The centripetal optical system moves the objective lens 5 horizontally toward the machine center,
A centripetal telephoto length 8 comprising a focusing plate 6 having a crosshair and an eyepiece 7 protruding outside the frame of the machine body is provided, and a vertical axis 9 is provided at the center of the machine. Is configured to be vertically refracted by the optical path changing prism 10 and coincide with the centripetal collimation line 11. The machine body 1 is provided with a collimating telescope T to be set rotatably about a horizontal axis and a vertical axis.

Therefore, the eyepiece of the centripetal telescope 8 protrudes outside from the frame of the machine main body 1 as shown in FIG. 2, and as shown in FIG. Is moved horizontally, and if the crosshairs of the measurement point 12 and the reticle 6 match, the centripetal operation has been completed, but the operation is difficult as described above.

Here, in a centripetal device of a surveying machine such as a transit or theodolite according to the present invention, as shown in the embodiment of FIG. 1, a visible light laser diode 13 is provided so as to be built in the machine main body 1. Visible laser diode
Reference numeral 13 is provided at the end of a centripetal optical system that projects a visible laser beam toward the centripetal collimation line 11 and is built in the machine main body 1. In addition, visible light laser diode 13
Is a small electronic part 14 built into the machine body 1.
Is driven by a very small drive circuit board 15 equipped with
The power source is also configured to be supplied by a battery 16 housed in a space in the machine body 1. The visible laser beam emitted from the visible laser diode 13 is used as a projection lens 17 and an optical path changing prism that constitute a centripetal optical system.
It is configured to project vertically on a centripetal collimation line (centripetal optical axis) 11 via 10 or the like. In addition, 18 is a power cord for connecting the battery 16 and the drive circuit board 15,
Reference numeral 19 denotes an inner cylinder that supports the projection lens 17.

In the above-described device of the present invention, the visible laser beam emitted from the visible laser diode 13 is a projection lens.
17. The optical path changing prism 10 projects the centripetal optical axis as a visible centripetal collimation line 11, and condenses and projects as a beam spot on the target measurement point 12. In addition, regardless of the distance of the target measurement point 12, the inner cylinder 19 of the projection lens 17 is provided so as to be movable and adjustable along the optical axis from outside so that the diameter of the projected beam spot can be adjusted to the minimum. Of course, it is possible.

Therefore, since the centering can be performed while directly looking at the centripetal collimation line 11 which can be visually recognized by the monochromatic visible light laser beam,
It is possible to solve the problem that the centering is performed while looking through the conventional centripetal telescope.

Here, the visible light laser diode 13 can be driven by a very small drive circuit board 15 on which a few electronic parts 14 are mounted, and can be sufficiently housed in the housing space of a centripetal telescope device of a conventional surveying machine, and Since the power supply is sufficient with a battery 16 of about 6 V (for example, four dry batteries), these can be housed in the frame of the body of the conventional surveying machine such as theodolite or transit without changing the size of the surveying machine. can do.

“Effects of the Present Invention” According to the present invention, a centripetal telescope which has conventionally been indispensable in a surveying machine having a collimating telescope that is set rotatably about a horizontal axis and a vertical axis can be omitted. Therefore, the configuration of the machine body can be simplified. Since the centripetal collimation line is composed of a single-color, narrow-diameter visible laser beam that can be visually recognized from the surroundings, the operation of matching the machine vertical line, that is, the centripetal collimation line, with the vertical line passing through the measurement point can be performed accurately. And easily. Therefore, the collimating telescope of the surveying machine can be set to be accurately rotatable about the horizontal axis and the vertical axis via the leveling screw on the tripod head. Furthermore, the laser light source of visible laser light that constitutes the centripetal collimation line is made up of a laser diode driven by a battery built into the machine body, so it is small and is resistant to vibrations and shocks to which this type of surveying machine is exposed. A strong device is obtained.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing a main part of the apparatus of the present invention, which is partly longitudinally cut. FIG. 2 is a schematic front view showing a main part of a conventional apparatus, partly cross-sectionally shown. FIG. DESCRIPTION OF SYMBOLS 1 ... Machine main body 2 ... Tripod 3 ... Tripod leg head 4 ... Leveling screw 5 ... Objective lens 6 ... Focusing plate 7 ... Eyepiece 8 ... Centripetal telescope 9 ... Vertical axis 10 ... Optical path Changing prism 11… Centered collimation line 12… Measurement point 13… Visible laser diode 14 …… Electronic parts 15 …… Drive circuit board 16 …… Battery 17 …… Projection lens 18 …… Power cord

Continuation of the front page (56) References JP-A-63-153420 (JP, A) JP-A-63-279190 (JP, A) JP-A-2-52218 (JP, A) JP-A-62-95418 (JP) , A)

Claims (1)

(57) [Claims] 1. A centripetal device for aligning a vertical axis of a surveying machine having a collimating telescope set rotatably about a horizontal axis and a vertical axis on a vertical line passing through a measuring point, comprising: A machine body that supports the collimating telescope and is supported on the foot via a leveling screw; the machine body having a centripetal optical axis coinciding with a vertical axis of the surveying machine. A built-in centripetal optical system; and a visible laser diode that is driven by a battery built into the machine main body and emits a monochromatic visible laser beam on a centripetal optical axis of the centripetal optical system. A centripetal device for a surveying machine such as a transit or a theodolite, comprising a visible centripetal collimation line.