JPH11248452A - Laser indicator - Google Patents

Abstract

(57) [Summary] [Purpose] The height difference between two points can be measured very easily, and the same level can be measured. In addition, a measuring device can be very easily installed just above a reference point. To provide a laser indicator device that can. A laser index device includes a laser oscillator for irradiating a laser beam inside a case and a battery serving as a power supply for the laser oscillator, and is irradiated from the laser oscillator. Adjusting screw 4 for adjusting the storage position of laser oscillator 46 so that the optical axis of the laser beam and the center of rotation L of the case coincide with each other;
Since 9 is provided, laser light can be emitted from the center of the case 41, and when attached to the surveying instrument, the laser light can indicate a predetermined index.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser index device which is detachably attached to a surveying instrument and indicates a predetermined index by a laser beam.

[0002]

2. Description of the Related Art Conventionally, for example, a height difference between two points is measured using a level (including an auto level including a correction device called a convencator inside a telescope), or the same level is measured. To do this, one worker looks into the telescope at the level mounted on the tripod, and the other worker holds the staff and adjusts each point to the line of sight of the telescope and scales the staff. He called to determine the height difference between the two points, or set the same level.

When measuring a horizontal angle, an altitude angle, or a distance using a theodolite or a total station, the theodolite or the total station is mounted on a tripod so that the theodolite or the total station is directly above a reference point. He set the position of the tripod while looking into the provided centripetal telescope.

[0004]

As described above, when a level difference is used to measure the height difference between two points, or when the same level is measured, it is troublesome and easy to measure. When measuring the horizontal angle, altitude angle, or distance using a theodolite or a total station, make sure that they are located directly above the reference point while looking into the centripes provided on those measuring points. There is a problem that it takes time to install a tripod. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has as its object to measure a height difference between two points very easily, to measure the same level, and to set a reference level. It is an object of the present invention to provide a laser indicator device that can extremely easily install a measuring device directly above a point.

[0005]

A specific solution adopted by the present invention to achieve the above object will be described with reference to the drawings. As shown in FIG. 3, the invention according to claim 1 is a laser index device 4 which is detachably attached to a surveying instrument 27 and indicates a predetermined index by a laser beam.
0, the laser indicator device 40 is configured by housing a laser oscillator 46 for irradiating a laser beam inside a case 41 and a battery 45 as a power source of the laser oscillator 46. An adjustment screw 49 is provided as an adjustment mechanism for adjusting the storage position of the laser oscillator 46 so that the optical axis of the laser beam emitted from the laser beam coincides with the rotation center L of the case. . With this configuration, the laser light can be emitted from the center of the case 41, and when attached to the surveying instrument, the laser light can indicate a predetermined index.

The laser index device 40 constructed as described above is attached to the eyepiece 29 of the level 20 for measuring the horizontal level via the adapter 55 as shown in FIG. So, staff 62
By irradiating the laser beam to the desired height P point measured by the above and then rotating the level 20, points P1 to P6 having the same height as the point P can be easily indexed. This operation can be easily performed by one person.

Further, as shown in FIG. 5, by attaching the laser index device 40 to the fixed rod 12 provided on the leg 3 of the surveying tripod 1, as shown in FIG. Irradiated laser light is used as reference point Q
By setting the tripod 1 while adjusting the leg 2 and the like of the tripod 1 so as to adjust the position, the tripod 1 can be easily set to the reference point Q. After being installed in this manner, the laser indicator device 40 is removed from the center rod 12, and for example, as shown in FIG. 7, the total station 70 is loosely fixed to the head 3 of the tripod 1 by the center rod 12. Thereafter, the fixed rod 12 may be fixed so that the total station 70 is accurately located right above the reference point Q while looking into the centripetal telescope 71. In this case, since the position of the fixed rod 12 is located near the reference point Q by the laser indicator device 40, the operation of searching for the reference point Q by the centripetal telescope 71 can be performed extremely easily.

Further, by connecting the laser indicator device 40 directly to the eyepiece of the centripetal telescope 71 of the total station 70 via an attachment as shown in FIG.
Is applied to the ground via the centripetal telescope 71. By adjusting the legs 2 and the like of the tripod 1 so that the irradiation point of the laser light coincides with the reference point Q, the total station can be easily obtained. 70 can be set directly above the reference point Q.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. First, the structure of the tripod 1 on which the surveying instrument is installed will be described with reference to FIGS. Figure 1 shows a tripod 1 with an auto level 2 as a surveying instrument.
FIG. 6 is a perspective view showing a state in which
FIG. 6 is a cross-sectional view showing a state in which a laser indicator device 40 is fixed to the leg 3 of FIG. In the figure, a surveying tripod 1 includes a leg 3 on which a surveying instrument is mounted and fixed, and three legs 2 supporting the leg 3. The leg portion 2 is configured to be extendable and contractible so that it can be fixed at an arbitrary height and can be opened at an arbitrary angle with respect to the leg head 3. The leg head 3 and the leg 2 are formed by die casting of an aluminum alloy. On the other hand, the leg head 3 includes a leg support 4 on which the leg 2 is mounted and supported,
A spherical cylindrical body 5 in which the inner spherical surface of the leg support 4 abuts on the outer peripheral surface thereof, and a spherical cylindrical body 5 interposed between an inner peripheral surface of the spherical surface of the leg support 4 and an outer peripheral surface of the spherical cylindrical body 5. A ball receiving member 7 made of synthetic resin (nylon resin, polyacetal resin, or the like), a horizontal base 6 screwed to the upper end of the spherical cylinder 5 and capable of mounting a measuring instrument, A swinging member 10 which is supported by the inner surface of the horizontal base 6 on the back surface of the horizontal base 6;
And a fixed rod 12 that can move along the longitudinal direction of the measuring instrument and fixes the surveying instrument.

The horizontal base 6 has an upper surface formed in a substantially horizontal shape, and a moving opening circle 9 for determining a moving range of the fixed rod 12 is formed at the center thereof. Swing member 1
Reference numeral 0 denotes a substantially rectangular rod-shaped member, and has a movable opening 11 through which the fixed rod 12 can be inserted and moved along the longitudinal direction of the rod-shaped member. The swing member 10 has one end pivotally supported by a screw, and the other end is always in contact with the back surface of the horizontal base 6 regardless of the swing direction.
Further, the fixed core rod 12 inserted into the swinging member 10 has a screw portion 13 formed at an upper portion thereof, and regulating projections 12a and 12b for preventing the movable rod 11 from coming off from the movable opening 11 in the middle thereof. Vertical movement of the fixed rod 12 is restricted by the restriction protrusions 12a and 12b. Also, the through hole 1 is
4 is formed, a surveying instrument to be described later is
, A reference point serving as a reference point for surveying can be seen through a surveying instrument, and surveying at an accurate position becomes possible. In the illustrated embodiment, the fixed rod 1
Although the diameter of the threaded portion 13 of FIG. 2 is a small-diameter screw (5/8 inch screw) with a small diameter, the diameter of the threaded portion of the fixed core rod 12 may be a 35 mm screw with a large diameter.

Although the constituent members of the leg head 3 have been described above, when the leg members 3 are constructed by assembling the above-described members, the spherical cylinder 5 integrally connected to the horizontal base 6 and the leg support 5 The body 4 can freely tilt by 360 degrees via the ball receiving member 13, and the lower end of the fixed rod 12 projects downward from the lower end edge of the leg support 4. Since the swinging member 10 supporting the fixed rod 12 is located inside the spherical cylinder 5, the size of the leg 3 in the vertical direction does not increase, and the size can be reduced. Since the swinging member 10 is supported on the rear surface of the horizontal base 6 whose horizontality is provided by using a spherical surface with respect to the leg support 4, even if the fixed rod 12 is strongly tightened, 6 does not move with respect to the leg support 4 and the levelness can be reliably maintained. In addition, a ball receiving member 7 made of synthetic resin is interposed at a contact portion between the inner peripheral surface of the spherical surface of the leg support 4 and the outer peripheral surface of the spherical cylinder 5 of the horizontal base 6, so that the leg support 4 is Movement by the spherical surface with the flat base 6 can be performed more smoothly. In addition, a fixing knob 8 for pressing and fastening the ball receiving member 7 toward the outer peripheral surface of the spherical cylinder 5 of the horizontal base 6 is provided on one side of the leg support 4, so that the horizontality can be reduced by a simple operation. The tilting position of the horizontal base 6 after being extended can be securely held by tightening the fixing knob 8. Further, by forming the through hole 14 vertically penetrating at the center of the fixed rod 12, the fixed point of the survey can be accurately known even when the surveying instrument is attached.

A measuring instrument is mounted and fixed on the leg 3 of the surveying tripod 1 constructed as described above. FIG. 1 and FIG. This will be described with reference to FIG. FIG. 1 is as described above, and FIG. 2 is a perspective view of the automatic level 20.
In the drawing, an auto level 20 is provided via a support fixing base 21 having a screw portion screwed to the screw portion 13 of the fixed core rod 12 formed in the center of the back surface thereof, and a support adjusting base 21 and a horizontal adjustment knob 22. Angle scale display stand 23, which is connected to the rotary scale 24 and has an angle scale displayed on the outer periphery thereof, a turntable 24 rotatable with respect to the angle scale display stand 23, and a telescope (shown in FIG. ) Is built-in.

The support base 21 is a horizontal base 6 of the tripod 1.
The horizontal adjustment knob 22 is
Three are arranged at equal angles to fine-tune the horizontal.
The confirmation of the horizontality is performed by a bubble tube 26 provided on the upper surface of the turntable 24. The rotation of the turntable 24 is controlled by a rotation adjustment knob 25 provided in front of the turntable 24.
The rotation angle is confirmed by checking the position of the turntable 24 at an arbitrary position (not shown in the figure).
7) and the angle scale display 23.
It can be read from the scale. Further, the telescope built in the telescope tube 27 naturally includes an objective lens 28 and an eyepiece 29 (see FIG. 3).
And a correction device called a convencator is built therein. This compensator corrects the inclination even if the auto level 20 is slightly inclined, and maintains the horizontal. Note that the eyepiece 29 has
The laser indicator device 40 constituting a main part of the present embodiment can be attached via an attachment 55. The eyepiece 2 is located at the middle side of the telescope tube 27.
In order to be able to check the level of the auto level 20 while maintaining the position of looking into the camera 9, a bubble tube reflecting mirror 31 is provided above the bubble tube 26, and the built-in telescope is focused. Adjustment knob 3 for
0 is provided.

The automatic level 20 constructed as described above
As described above, the laser index device 40 can be attached to the eyepiece 29 via the attachment 55 as described above. Therefore, a detailed configuration of the laser indicator 40 will be described below with reference to FIGS. FIG. 2 is as described above, and FIG. 3 is a cross-sectional view of the laser index device 40 attached to the eyepiece 29 of the automatic level 20. In the figure, a laser indicator device 40 is configured by housing a laser oscillator 46 for irradiating a laser beam inside a case 41 and a battery 45 as a power supply for the laser oscillator 46. More specifically, the case 41 is a cylindrical member formed by die-casting an aluminum alloy, into which a sleeve 42, which is also precisely formed of an aluminum alloy, is inserted and fixed. It is fixed to the case 41 by screws 43 and 44. The front sleeve fixing screw 43 is screwed into a screw hole formed in the case 41, and the tip of the screw is fitted into a concave portion of the sleeve 42 to rotate the sleeve 42 in the case 41, and to move forward and backward in the case 41. The rear sleeve fixing screw 44 is screwed through a screw hole formed in the case 41 so that the tip thereof presses and abuts the outer periphery of the sleeve 42. The front area of the sleeve 42 is a storage space for the laser oscillator 46, and the rear area is a storage space for the battery 45.

A laser oscillator 46 disposed in a storage space in front of the sleeve 42 is supported by an adjusting screw 49 screwed to the sleeve 42. That is, the adjustment screw 49 inserted from the operation hole 48 formed in the case 41 is screwed from a screw hole formed in the sleeve 42, and the tip thereof comes into contact with the outer peripheral cylinder of the laser oscillator 46. I have. Four adjusting screws 49 are screwed at equal intervals (90 degrees) forward and backward, respectively, and the storage position of the laser oscillator 46 can be adjusted by a total of eight adjusting screws 49. . That is, the adjusting screw 49 constitutes an adjusting mechanism. Thus, this adjustment is performed as follows. That is, as shown in FIG. 3, the rear end of the outer peripheral cylinder of the laser oscillator 46 comes into contact with an arc portion formed substantially in the middle of the sleeve 42, so that the laser oscillator 46 is inserted into the sleeve 42. At this point, the laser oscillator 46 is positioned substantially at the center of rotation of the case 41, so that the four adjustment screws 49 on the rear side are gently tightened to make contact with the outer cylinder of the laser oscillator 46,
Thereafter, the four front adjustment screws 49 are gently tightened to make contact with the outer cylinder of the laser oscillator 46. In this state, since the optical axis of the laser oscillator 46 and the center of rotation of the case 41 do not exactly coincide with each other, the laser index device 40 is then rotated on, for example, a V-shaped block and rotated for a predetermined distance (for example, 1.5 m) Adjust the front adjustment screw 49 so that the laser irradiation light applied to the distant wall does not move circularly. When the laser irradiation light does not move circularly even when the laser index device 40 is rotated, the optical axis of the laser light irradiated from the laser oscillator 46 coincides with the rotation center L of the case 41.

In order to focus on a position separated by a predetermined distance, the lens holder 47 provided at the tip of the laser oscillator 46 is rotated with respect to the main body of the laser oscillator 46 and moved in the front-back direction. In addition, in order to irradiate the laser beam from the laser oscillator 46, the switch 51 provided on the battery cover 50 screwed to the sleeve 42 at the rear end of the battery 45 is turned on. Note that the battery cover 50 is
1 is protected by a protective cover 52 screwed to the rear end except for the rear surface where the switch 51 is provided.

As described above, by aligning the optical axis of the laser beam emitted from the laser oscillator 46 with the rotation center L of the case 41, the laser index device 40 can be mounted on the eyepiece 29 or the like of a surveying instrument. The optical axis of the laser beam emitted from the laser oscillator 46 and the central axis of the telescope of the surveying instrument can be uniquely matched.
Here, the primary reason is that the laser indicator 4
This is because it is necessary to satisfy the premise that 0 is perpendicular to the eyepiece 29 of the surveying instrument and that the center of the eyepiece 29 and the center of rotation L are attached to each other. Therefore, in the present embodiment, the laser is attached via the attachment 55 so that the laser indicator device 40 is attached at right angles to the eyepiece 29 of the surveying instrument and the center of the eyepiece 29 coincides with the center of rotation L. The index device 40 is attached to a surveying instrument. That is, the attachment 55 is attached to a screw portion formed on a member for supporting and fixing the eyepiece 29 (a protection cover for protecting the periphery of the eyepiece portion is screwed to the screw portion). Screw part 55a
Into the attachment 55, and attach the case 4 to the attachment 55.
1 is fixed by screwing a screw portion 54 formed on the outer periphery of the front end. With this attachment, the laser indicator device 40 can be attached so as to be perpendicular to the member for fixing the eyepiece 29. This means that the laser indicator device 40 is perpendicular to the eyepiece 29 and Center of lens 29 and center of rotation L
Means that they are attached in conformity with each other. When the laser indicator device 40 is attached, the eyepiece 29 is housed in an eyepiece housing 53 formed at the end of the case 41.

However, when the automatic level 20 is used as a surveying instrument to which the laser index device 40 is to be mounted, a correction device is built in, and the mounting accuracy of the correction device differs depending on each product. Therefore, it is necessary to actually attach the laser indicator device 40 to the automatic level 20 and adjust the adjustment screw 49 so that the height visually recognized from the eyepiece lens 29 and the point irradiated with the laser beam coincide. Specifically, the laser index device 4
With the eyepiece 29 removed, the user looks into the eyepiece 29 and adjusts the hairline (the internal crosshair) to an arbitrary height (for example, 100 cm) of a staff staff that is erected at a predetermined distance away from the eyepiece 29. The laser index device 40 is mounted and a laser beam is irradiated on the staff, and the adjusting screw 49 is adjusted so that the irradiated point indicates the above-mentioned arbitrary height (100 cm). Thereby, the hairline and the irradiation point can be matched.

The operation of the automatic level 20 with the laser index device 40 in which the hairline and the irradiation point are matched as described above will be described with reference to FIG. FIG. 4 is a schematic diagram for explaining the operation when the same level is measured by the automatic level 20 with the laser indicator device 40. The auto level 20 is mounted and fixed on the tripod 1, but the tripod 1 is omitted in FIG. In the figure, the switch 51 of the laser indicator 40 is turned on.
After irradiating the laser beam, the laser beam is adjusted to the height P to be measured of the staff 62 erected at a predetermined distance. This alignment operation is performed so that the bubble tube 26 provided in the automatic level 20 supports the horizontal level and the focus adjustment knob 30 focuses on the index line P of the staff 62 at a desired height. Then, the rotation adjustment knob 25 of the automatic level 20 is designated to indicate a point having the same height as the height P.
By turning, points P1 to P6 at the same height can be indexed very simply and quickly. The work in this measurement can be performed by one person.

In the above description, the auto level 2
Although the case of measuring the same height by 0 has been described, in the case of measuring the height difference, the height of the first point is measured by irradiating the staff 62 with laser light,
Then, by measuring the height of the second point by irradiating the staff 62 with laser light, it is possible to measure extremely simply and quickly.

Next, the case where the above-mentioned laser index device 40 is mounted on the fixed rod 12 of the leg 3 of the tripod 1 and the tripod 1 is set at the reference point Q for survey will be described with reference to FIGS. I do. FIG. 5 is a perspective view showing a state where the laser index device 40 is attached to the fixed rod 12 of the leg 3 of the tripod 1, and FIG. 6 is a state where the laser index device 40 is fixed to the leg 3 of the tripod 1. FIG. 7 is a perspective view showing a state in which a total station 70 as a surveying instrument is mounted and fixed on the leg 3 of the tripod 1.

5 and 6, the construction of a laser index device 40 fixed to the fixed rod 12 of the leg 3 of the tripod 1 is the same as that shown in FIG. A cylindrical first attachment 58 and a second
Attachment 59 is screwed into each, and bubble tube support member 56 having bubble tube 57 in the middle of case 41 is provided.
Is fixed. As shown in FIG. 6, a fixed rod 12 is provided on the inner periphery of the lower part of the first attachment 58.
A small diameter screw 60 to be screwed in when the screw portion 13 at the upper end is a ／ inch screw is formed, and a fixed rod 12 is formed on the inner periphery of the second attachment 59 as shown in FIG.
A large-diameter screw portion 61 to be screwed when the upper screw portion 13 is a 35 mm screw is formed. Further, the second attachment 59 has a bottom surface abutting on the horizontal base 6 of the tripod 1, and the second attachment 59 is attached to the horizontal base 6.
The horizontal state can be obtained by tilting the spherical cylinder 5 while watching the bubble tube 57 in a state in which it is in contact with.

Thus, the laser index device 40 constructed as described above is attached to the fixed rod 12 of the tripod 1 and fixed. In this state, the leg 3 of the tripod 1 is positioned almost directly above the reference point Q. After turning on the switch 51 of the laser indicator device 40, the spherical cylinder 5 is tilted with the fixing knob 8 loosened, so that the laser beam points to the reference point Q and the bubble tube 57 is leveled. The fixing knob 8 is turned at the indicated position to fix the spherical cylinder 5. As a result, the foot 3 of the tripod 1
Can be located directly above the reference point Q. In particular, when the tripod 1 is installed on a slope such as a mountainous area and the foot 3 of the tripod 1 is installed just above the reference point Q located in the middle of the slope, quick and easy operation is performed. Can be.

After the foot 3 of the tripod 1 has been set just above the reference point Q as described above, the core rod 12 is loosened and the laser indicator 40 is removed. A surveying instrument, for example, a total station 70 as shown in FIG. In this case, since the fixed rod 12 is loosened, the position of the swing member 10 is
Although the position is shifted from the position indicating the reference point Q, since the deviation is within the swing range of the swing member 10, the total station 70 is loosely fixed to the fixed rod 12 and is provided in the total station 70. While looking into the centripetal telescope 71, the rocking member 10 is rocked so that the cross line of the centripetal telescope 71 coincides with the reference point Q, and the fixed rod 12 is fixed at the coincident position. Thus, the total station 70 can be installed right above the reference point Q.

The laser index device 40 shown in FIG. 5 is attached to the fixed rod 12 of the tripod, and the tripod 1 is positioned just above the reference point Q.
Without going through the work process of positioning the leg head 3 of the tripod, the total station 70 is attached to the leg head 3 of the tripod 1 from the beginning, and an attachment (not shown) is attached to the centripetal telescope 71 of the total station 70 as shown in FIG. 1 may be attached to the base 2 and the leg 2 and the spherical cylinder 5 may be adjusted so that the irradiation point indicates the reference point Q while the laser light is irradiated on the ground. . In this case, after the laser indicator device 40 is finally removed from the centripetal telescope 71, the horizontal adjustment knob or the like of the total station 70 is adjusted so that the crosshair of the centripetal telescope 71 coincides with the reference point Q while looking into the centripetal telescope 71. To operate the total station 7 directly above the reference point Q.
What is necessary is just to set correctly so that 0 may be located.

The embodiment of the present invention has been described above. In the above embodiment, the automatic level 20, the tripod 1, and the total station 70 are shown as the surveying equipment. Even so, the laser indicator 40 according to the present embodiment can be applied. Further, the structure of the tripod for mounting and fixing the automatic level 20 is not limited to the one shown in the figure, and any structure may be used as long as the automatic level 20 can be fixed to the leg. Further, the structure of the tripod on which the laser index device 40 and the total station 70 are mounted and fixed may be any structure provided that it has the fixed core rod 12 having the through hole 14.

[0027]

As is apparent from the above description, the invention according to claim 1 is a laser index device which is detachably attached to a surveying instrument and indicates a predetermined index by a laser beam. Laser indicator device
A laser oscillator for irradiating laser light inside the case and a battery as a power supply for the laser oscillator are housed, and the optical axis of the laser light emitted from the laser oscillator coincides with the rotation center of the case. Since the adjusting mechanism capable of adjusting the storage position of the laser oscillator is provided, the laser light can be emitted from the center of the case, and when attached to the surveying instrument, the laser light points to a predetermined index. Can be.

According to a second aspect of the present invention, the laser index device configured as described above is attached via an adapter to an eyepiece having a level for measuring horizontality.
By irradiating a laser beam to a desired height point measured by a staff and then rotating the level, a point having the same height as the desired height can be easily indexed.
This operation can be easily performed by one person.

According to a third aspect of the present invention, a laser index device is attached to a fixed rod provided on a leg of a tripod for surveying, so that a laser beam emitted from the laser index device is adjusted to a reference point. By installing the tripod while adjusting the legs, the tripod can be easily installed in accordance with the reference point.

According to a fourth aspect of the present invention, by connecting the laser index device directly to an eyepiece of a centripetal telescope of the surveying instrument via an attachment, the laser light emitted from the laser index device is transmitted to the ground surface through the centripetal telescope. By adjusting the legs of the tripod so that the irradiation point of the laser beam coincides with the reference point, the surveying instrument can be easily installed directly above the reference point.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state where an automatic level as a surveying instrument is mounted on a tripod.

FIG. 2 is a perspective view of an automatic level.

FIG. 3 is a cross-sectional view of a laser index device attached to an auto-level eyepiece.

FIG. 4 is a schematic diagram for explaining an operation when the same level is measured by an automatic level with a laser indicator device.

FIG. 5 is a perspective view showing a state in which a laser index device is attached to a fixed rod at the head of a tripod.

FIG. 6 is a cross-sectional view showing a state in which a laser index device is fixed to a leg of a tripod.

FIG. 7 is a perspective view showing a state in which a total station as a surveying instrument is placed and fixed on a leg of a tripod.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tripod 2 Leg part 3 Leg head 12 Constant core rod 20 Auto level (level) 40 Laser indicator 41 Case 45 Battery 46 Laser oscillator 49 Adjustment screw (Adjustment mechanism) 55 Attachment 58 First attachment 59 Second attachment 62 Staff 70 Total station 71 Centripetal Telescope

Claims (4)

[Claims] 1. A laser index device which is detachably attached to a surveying instrument and indicates a predetermined index by a laser beam, the laser index device comprising: a laser oscillator for irradiating a laser beam inside a case; An adjustment unit configured to house a battery as a power source of the oscillator, and to adjust an accommodation position of the laser oscillator so that an optical axis of laser light emitted from the laser oscillator and a rotation center of the case coincide with each other. A laser indicator device provided with a mechanism. 2. The laser indicator according to claim 1, wherein the surveying instrument is a level for measuring horizontality, and the laser indicator device can be removably attached to an eyepiece of the level via an adapter. apparatus. 3. The surveying instrument according to claim 1, wherein the surveying instrument is a surveying tripod, and the laser indicator device can be detachably attached to a fixed rod provided on a leg of the surveying tripod. Laser indicator device. 4. The surveying instrument is a theodolite as a goniometer or a total station as an electronic ranging goniometer, and the laser indicator device is detachably attached to the theodolite or a centripetal telescope of the total station via an adapter. The laser indicator device according to claim 1, wherein the laser indicator device can be attached.