JPH09257477A - Laser reference level apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily set a laser projection apparatus, save labor, enhance visibility of a target and improve workability. SOLUTION: The apparatus is constituted of a laser projection device 10 and a target 61. The target 61 has a reflecting face related to a predetermined position thereon. The laser projection device 10 has a laser oscillation device with a rotatably supported projection means for projecting laser beams and a detecting means for detecting reflecting laser beams, a driving device for rotating at least the projection means of the laser oscillation device, and a control part for controlling the driving device in accordance with a detecting state of the reflecting laser beams from the reflecting face of the target so that the laser beams are directed to a predetermined position of the target 61. In this case, the laser reference level apparatus can be remote-controlled from two directions, i.e., front-rear and up-down directions. Therefore, when inclined reference laser beams are to be formed to bury a tunnel and when an inclined angle of the buried tunnel is to be measured, etc., the laser reference level apparatus is manipulated from the ground, and cost-saving and workability features are furthermore improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser reference level device for setting a reference line for performing various civil works.

[0002]

2. Description of the Related Art In civil engineering work, a horizontal reference line or a reference line inclined at a required angle to the horizontal is required. A laser reference level device is used for setting such a reference line.

For example, when burying a concrete pipe in sewage work, it must be further inclined at a required angle so as not to bend.

[0004] Such concrete pipes are used for water supply and sewerage.
It is provided as a flow path for flowing a liquid material, and is set up with a certain gradient and without bending. If the buried concrete pipe meanders up and down, left and right, the liquid material stays and becomes clogged or leaks into the ground, and cannot function as a flow path. Therefore, an appropriate reference line is required for burying the concrete pipe.

As such a reference line, a laser beam is convenient, does not slacken like a thread even at a long distance, does not interfere with work, and further interferes with work or concrete pipes. It will not be cut. The laser reference level device emits a laser beam to form a reference line when installing a concrete pipe.

As a typical work for burying a concrete pipe or the like in the soil, there is an open cut method in which the ground is dug down, and concrete pipes are sequentially buried and buried in the dug trench.

The open-cut construction method will be described below with reference to FIG.

The laser reference level device has a laser irradiating device 1 for emitting a laser beam in a horizontal or gradient direction and a target 9.
If the laser beam emitted from the laser beam coincides with the horizontal, the reference line becomes a horizontal reference line, and if the laser beam is inclined by a required angle, the reference line has a gradient.

At every straight line section, a vertical hole 3 is excavated at a starting point where the concrete pipe 2 is to be buried, and a buried groove 4 continuous with the vertical hole 3 is formed at a depth where the concrete pipe is to be laid. Excavate above. The laser irradiation device 1 is installed in the vertical hole 3 and emits a laser beam at a gradient θ to form a reference laser beam L. The concrete pipe 2 is installed in the embedding groove 4 via a temporary table 5 so that the axis matches the reference line L. When the axis of the concrete pipe 2 matches the reference laser beam L, the buried groove 4 is backfilled and the concrete pipe 2 is refilled.
Buried.

The position of the laser irradiation device 1 in the horizontal direction must be accurately set. Conventionally, in the horizontal position setting of the laser irradiation device 1, a support base 6 is provided above the vertical hole 3, a transit 7 is installed on the support base 6, and a plumb bob 8 is hung from the transit 7 to make a known position. Set the point. Further, a laser irradiation device is installed in the vertical hole 3, the plumb bob 8 is aligned with the center of the laser irradiation device 1, and the plumb bob 8 is drooped from the laser irradiation device 1. It is done by matching with.

In the open cut method, the concrete pipe 2 is temporarily installed at the end position of the buried groove 4 and the target 9 is installed therein. The distance between the center of the target 9 and the ground contact point is equal to the inner diameter of the concrete pipe 2. When the target 9 is installed inside the concrete pipe 2, the center of the target coincides with the center of the concrete pipe 2.

The laser beam irradiation portion of the target 9 is composed of a semitransparent member, and the irradiation position of the laser beam can be confirmed, and the transmitted laser beam diffuses in a conical shape.
The irradiation position of the target 9 can be confirmed within the range where the transmitted laser beam is diffused. When setting the inclination of the laser beam emitted from the laser irradiation device 1, the inclination setting angle is input to the laser irradiation device. The laser irradiation device 1 has a built-in tilt mechanism using a pulse motor as a drive source.
The tilting mechanism is operated to tilt the laser beam to a predetermined tilt.

The irradiation position of the laser beam is confirmed by the target 9 placed on the extension of the laser beam irradiated from the laser irradiation device 1. When the irradiated laser beam is deviated from the center of the target 9, the temporary concrete pipe 2 or the laser beam is adjusted up and down in the vertical direction, and the laser beam of the target 9 is shifted from the laser irradiation device 1 side in the horizontal direction. While checking the light irradiation position,
The adjusting device (not shown) of the main body is manually operated to adjust the laser beam to the center of the target 9 or the concrete pipe. The concrete pipe 2 is installed with the laser beam irradiating the center of the target 9 as a reference line.

[0014]

In the above-mentioned conventional laser reference level device, when the laser irradiation device 1 is installed,
Since the plumb bob 8 is used to align the surveying instrument such as the transit 7 placed on the ground side with the laser irradiation device placed below, an error may occur due to external factors such as wind. , Adjustment takes time and effort. Furthermore, there is a problem that a worker is required for each of the laser irradiation device side and the target side, a plurality of manpower is required for alignment, workability is poor, and loss time cannot be avoided.

Further, the laser beam transmitted through the target 9 is uniformly diffused in a conical shape and can be confirmed from above, below, left and right.
Actually, the irradiation position of the target 9 is mainly confirmed from the vertical direction, and since it is diffused uniformly, there is much waste,
The visibility from the required direction is low. Further, in the above-mentioned conventional laser irradiation apparatus, since the pulse motor is used as a power source for operating the mechanism for setting the tilt, and the number of pulses of the pulse motor from the horizontal is converted into the tilt angle, the pulse motor may lose step. However, if there is a deviation between the pulse motor and the driven mechanism driven by the pulse motor, there is a problem that the correct inclination cannot be set.

In view of such circumstances, the present invention intends to facilitate the installation of the laser irradiation device to save labor, enhance the visibility of the target, and improve the workability.

[0017]

The present invention comprises a laser irradiation device and a target, the target having a reflecting surface associated with a predetermined position on the target, the laser irradiation device being rotatable. A laser oscillating device having a laser beam emitting means and a reflected laser beam receiving means supported by the driving means, a driving means for rotating at least the laser beam emitting means of the laser oscillating device, and a reflecting surface of the target. The present invention relates to a laser reference level device having a control unit for controlling the driving device so as to direct the laser beam to a predetermined position of the target according to a reflected laser beam receiving state, and a remote receiving unit before and after the laser irradiation device. According to the laser reference level device provided, at least one of the front surface and the rear surface of the laser irradiation device is inclined, and the display portion is provided on the inclined surface. Laser reference level device, wherein the laser beam emitting means comprises a projection optical system and a laser beam emitting section, and a laser reference level for guiding the laser beam from the laser beam emitting section to the projection optical system by an optical fiber. The present invention relates to a laser reference level device which is a laser beam emitting means which is arranged near the output end of a fiber and which has a reflecting means for reflecting a laser beam and splitting a part as monitor light. The means has an aperture,
The present invention relates to a laser reference level device that increases the light intensity in the central portion of a projected image, and a laser irradiation device has a vertical beam emitting unit that emits a laser beam in a vertical direction, and at least a laser of an optical system of the vertical beam emitting unit. The present invention relates to a laser reference level device provided with a correction mechanism for directing a laser beam from a light beam emitting part in a vertical direction, and a laser irradiation device has a vertical beam emitting part for irradiating a laser beam in the vertical direction. The present invention relates to a laser reference level device provided with a laser protection cover provided with a density filter on the optical path of a vertical beam of a part, and is composed of at least two different condensing lenses, and a reflected laser beam and a remote scanning light are provided. The present invention also relates to a laser reference level device which is a remote receiving unit having a light receiving unit which also receives light, and is composed of different condenser lenses divided into at least two. In addition, at least one is related to a laser reference level device which is a remote receiving unit having a light receiving unit which transmits a specific wavelength and also receives a reflected laser beam and a remote scanning light, and a battery which is detachable from the main body. A main body side contact is provided in the main body part, and a battery pack side contact is provided in the battery pack, and a main body side contact,
A waterproof packing is provided on either one of the battery pack side contacts, and the waterproof packing is related to a laser reference level device that houses and seals the body side contacts and the battery pack side contacts when the battery pack is mounted, and the target plate of the target is It relates to a laser reference level device that is different in color from the laser beam that transmits a plurality of wavelengths including the wavelength of the laser beam. Furthermore, the target plate of the target has translucency, and the irradiated laser beam is expanded in one direction. The laser reference level device can be operated remotely from the top and bottom in two directions, forming tilt reference laser beams when burying a tunnel, and measuring the tilt angle of the tunnel after burying. Also, operation from the ground is possible, which saves labor and improves workability.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, the same parts as those shown in FIG. 33 are designated by the same reference numerals. First, the outline of the present embodiment will be described.

The laser irradiation device 10 is so constructed as to emit a vertical laser beam Lv in the vertical direction as well, and observes it with a centripetal telescope of the transit 7, and performs alignment so that the vertical laser beam irradiates the grounding point. . Since the laser beam is used as the reference for measurement, it is not affected by external factors such as wind.

The target 61 is provided with a reflecting portion for reflecting the laser beam, and the laser irradiation device 10 is constructed so as to detect the reflected laser beam from the target 61, and the target can be detected from the aspect of the reflected laser beam. The center of 61 can be detected.

The adjustment of the horizontal deviation of the irradiation position of the laser beam applied to the target 61 is performed by scanning the target 61 with the laser beam emitted from the laser irradiation device 10 and receiving the reflected light from the reflection part. , The center of the target 61 is calculated from the received state of the reflected light, and the irradiation position of the laser beam is automatically adjusted. Further, the laser irradiation device 10 is configured to be remotely controllable, and work can be performed without requiring an operator on the laser irradiation device 10 side.

Further, the target 61 is constructed so as to diffuse the laser beam only in the vertical direction, so that the visibility in the necessary direction without waste, that is, the vertical direction is improved.

Hereinafter, one embodiment will be described in detail with reference to FIGS.

First, the laser irradiation device 10 will be described.

The main body 100 has a cylindrical shape, and the main body 100 is supported by four support legs 41. A laser oscillation device 11 is provided in a main body 100 inside a cylindrical casing 102 so as to be swingable in two directions, a vertical direction and a horizontal direction. The laser oscillation device 11 is horizontally and vertically oriented. It is configured to emit a laser beam.

A light projecting window 103 covered with glass is provided on the front surface of the main body 100, and a laser beam from the laser oscillator 11 is irradiated through the light projecting window 103.

A light receiving window 104 is provided above the light projecting window 103, and the target 61 is passed through the light receiving window 104.
It receives the reflected laser beam from, and also receives the operation signal light for remote control.

A front leg 105 is provided on the front surface of the main body 100.
Is provided, and the laser irradiation device 1 is provided through the front leg 105.
0 can be installed upright.

A laser protection cover 106 is provided on the upper surface of the main body 100.

As shown in FIGS. 5 and 6, the laser protection cover 106 is rotatably provided around the shaft bolt 107, and a cutout 108 is formed in a part thereof. ND at a position symmetrical with the notch 108
A (density) filter 109 is provided, and although not shown, a diffusion filter is provided in contact with the ND filter.
Good visibility of the laser beam. A top hole 110 is formed in the housing 102, a transparent glass gas 111 is provided in the top hole 110, and the cutout portion 108 and the ND filter 109 are aligned with the top hole 110. ing.

Thus, the notch 108 is formed in the top hole 110.
In the state in which the ND filter 1 and the vertical laser beam Lv are radiated by the laser irradiating device 10 in the vertical method,
When 09 is aligned with the top hole 110, the ND filter 109 slightly transmits the laser beam, so that the vertical laser beam is blocked and the diffusion filter and the ND filter 1 are provided.
The irradiation position of the laser beam can be confirmed through 09.

A battery pack 1 is provided on the upper rear side of the casing 102.
13 is fitted so that it can be inserted and removed. A recess 114 into which the battery pack 113 is fitted is formed in the housing 102, and the battery pack 113 is fitted into the recess 114. The recess 114 has a W-shaped cross-section, and a plurality of contacts 116 are provided on the upper surface of a ridge 115 that divides the left and right small recesses for accommodating batteries, and the contacts 116 are connected to the power supply line of the internal circuit. . The exposed upper end of the contact 116 is covered with a waterproof packing 118 made of a highly elastic material such as synthetic resin or rubber.
Reference numeral 18 has a funnel shape, and is in close contact with the bottom surface of the battery pack 113 when the battery pack 113 is fitted.

The battery pack 113 has a W-shaped cross section so as to fit into the recess 114, and a required number of batteries 119 such as dry batteries or rechargeable batteries are provided inside the battery pack 113, for example, four batteries 119. It is stored. A movable contact 120 is provided on the bottom surface of the recess into which the ridge 115 is fitted. A contact 122 is slidably fitted to a stator 121 of the movable contact 120, and the contact 122 is biased in a protruding direction by a spring. The waterproof packing 118 is attached to the battery pack 113 and the contact 12
2 is surrounded and closely adheres to the bottom surface of the battery pack 113, and the contact state between the contact 116 and the contact element 122 is made watertight independently for each contact. A drain hole 123 is formed in the side wall of the recess 114 of the housing 102 at a position lower than the top of the ridge 115. Thus, even if water enters the recess 114, the contacts are independently sealed to prevent a short circuit, and the invaded water is discharged from the drain hole 123. The battery pack 113 has a lock knob 124, and the body portion 100 of the battery pack 113 can be rotated by rotating the lock knob 124.
Can be easily locked and unlocked. Battery pack 1
13 includes a dry battery pack and a rechargeable battery pack. The operating voltage of dry batteries and rechargeable batteries differs depending on the characteristics of the batteries. A means for detecting the voltage is provided on the main body side, and the battery can be effectively used by detecting the voltage flowing through the contacts and setting different operating voltage ranges.

The rear portion of the main body 100 is inclined, and the inclined surface also serves as the operation panel 125.
5 is provided with various operation switches 126, and the light receiving window 12 for receiving the remote control operation signal is provided similarly to the display section 50, the bubble tube 128 and the light receiving window 104.
9 are provided. Since the light receiving window 129 is provided on the inclined operation panel 125, it can be remotely operated from either a horizontal direction or a vertical direction by a remote controller, and the laser irradiation device 10 can be installed underground from outside the shaft. It can be operated remotely. Further, since the display unit 50 is provided on the tilted operation panel 125, the display content can be similarly confirmed from above.

Next, the internal structure of the laser irradiation device 10 will be described with reference to FIGS.

The laser oscillator 11 is provided on a swing frame 13 which can be tilted about a horizontal shaft 12, and the swing frame 13 is provided on a main body frame 40 so as to be horizontally rotatable about a vertical shaft 14. . Further, a tilting frame 42 is provided on the horizontal shaft 12, a tilt lever 15 is connected to the tilting frame 42, and a tilt sensor 1 such as a bubble tube for indicating a horizontal state is provided on the tilting frame 42.
6 are provided. An encoder 43 is provided on the horizontal shaft 12, and the encoder 43 is provided on the horizontal shaft 12.
Rotation angle, that is, the tilt angle of the laser oscillator 11 is detected. Also, the signal from the encoder 43 is input to a gradient controller 48 (described later).

A horizontal angle adjusting mechanism 17 is provided in connection with the swing frame 13, a vertical angle adjusting mechanism 18 is provided in connection with the laser oscillator 11, and a tilt sensor tilting mechanism is provided in connection with the tilt lever 15. 19 are provided. The tilt sensor tilting mechanism 19 is provided on the support of the laser oscillator 11 and tilts integrally with the laser oscillator 11.

The horizontal angle adjusting mechanism 17 includes a horizontally rotatable first screw 20, a first slide nut 21 screwed to the first screw 20, and a first slide nut 21.
A pin 23 that is planted in the slide nut 21 and that engages with the swing frame 13, a driven gear 24 that is fitted to the first screw 20, and a drive gear 25 that is attached to the driven gear 24.
It is composed of a horizontal angle adjusting motor 26 connected via.

The vertical angle adjusting mechanism 18 includes a horizontally rotatable second screw 27, a second slide nut 28 screwed to the second screw 27, and a second slide nut 28.
The laser oscillation device 1 is planted in the slide nut 28.
1, a pin 29 that engages with the first screw 27, a driven gear 30 that is fitted to the second screw 27, and a vertical angle adjustment motor 32 that is connected to the driven gear 30 via a drive gear 31.

The tilt sensor tilting mechanism 19 includes a vertically rotatable third screw 33 and a third slide nut 34 screwed onto the third screw 33.
A pin 35 that is planted in the third slide nut 34 and that engages with the tilt lever 15, a driven gear 36 that is fitted to the third screw 33, and a gradient that is connected to the driven gear 36 via a drive gear 37. It is composed of a setting motor 38.

The lower end portion of the tilting frame 42 is formed in a bifurcated shape, and a vertical beam emitting portion 44 is provided on the crotch portion. The vertical beam emitting unit 44 will be described.

A laser beam emitting section 52 is provided on one of the vertical inner wall surfaces facing the tilting frame 42, and a reflecting mirror 53 is provided on the other vertical inner wall surface facing the laser beam emitting section 52. The reflecting mirror 53 and the laser beam emitting section 5
A beam splitter 39 is provided between the beam splitter 39 and the beam splitter 39, and the laser beam emitted from the laser beam emitting section 52 is split and reflected by the beam splitter 39 in two vertical directions.

The horizontal adjustment controller 46 drives the horizontal angle adjustment motor 26, the vertical angle controller 47 drives the vertical angle adjustment motor 32, and the gradient controller 48 drives the gradient setting motor 38.

The horizontal angle adjusting motor 26 of the horizontal angle adjusting mechanism 17 is a horizontal adjusting controller 46, the vertical angle adjusting motor 32 of the vertical angle adjusting mechanism 18 is a vertical angle controller 47, and a gradient setting motor 38 of the tilt sensor tilting mechanism 19. Is driven by a gradient controller 48, and the gradient controller 48 includes an encoder 43
The rotation angle signal from is input.

The horizontal adjustment controller 46 and the vertical angle controller 4
7. The gradient controller 48 is controlled by the controller 45, and the detection signal from the tilt sensor 16 is input to the controller 45. The control device 45 includes an operation panel 49 for starting and stopping the device, setting a gradient, etc., a gradient set value, an operating state, a laser beam irradiation direction, and a target 6.
A display unit 50 for displaying the detection position of 1 and the like, and a reflected laser beam detector 51 (described later) are connected.

Next, the laser oscillator 11 will be briefly described with reference to FIG.

In the figure, 55 is a laser beam emitting section for emitting a linearly polarized laser beam, and the laser beam emitting section 55 has a laser diode 56 and a collimating lens 57.
The laser beam from the laser diode 56 is converted into a parallel laser beam 58 by the collimator lens 57, passes through a half mirror 59 or a perforated mirror, and is a target 61.
Is irradiated.

Reflected light 5 reflected by the target 61
8'is incident on the laser oscillator 11, the reflected light 58 'incident on the laser oscillator 11 is reflected by the half mirror 59, and the reflected light 58' reflected by the half mirror 59 is further reflected on the half mirror 7.
Divided by 3, a part of the light is received by a light receiving means including a focusing lens 60, a polarizing plate 72, a reflected laser beam detector 51, and the like, and the remaining part reflected by the half mirror 73 is a focusing lens 74 and a polarizing plate 75. Laser beam detector 76 reflected via
And the received light signals from the reflected laser beam detector 76 and the reflected laser beam detector 51 are transmitted to the control device 45.
To enter. The half mirror 59 may be a perforated mirror.

The controller 45 drives and controls the horizontal angle adjusting motor 26 via the horizontal adjusting controller 46 according to the light receiving state of the reflected laser beam detector 51, and via the vertical angle controller 47. The vertical angle adjusting motor 32 is drive-controlled to determine the irradiation direction of the laser beam 58 from the laser oscillator 11.

In FIG. 14, a laser beam emitting section and an optical system for emitting a laser beam of the laser oscillator, a reflected laser beam detector which is a light receiving section for receiving a reflected laser beam, and an optical system are integrally shown. However, it may be constructed as a separate unit as will be described later. Further, the laser beam emitted from the laser diode 56 is linearly polarized light defined in a predetermined direction, but a polarizing plate for more accurately defining the deflection direction may be provided. Further, the half mirror 7
By using 3 as a polarization mirror, the polarizing plate 72 and the polarizing plate 7
5 can be omitted. Change to linearly polarized light, 1 / 4λ
A birefringent member may be provided at the laser beam emission end to detect circularly polarized light. In this case, the half mirror 73 becomes a polarization mirror.

Further, the visibility of the laser beam is improved by adding a diaphragm 54 described below to the above laser oscillator 11.

As shown in FIG. 15, when the diaphragm 54 is arranged on the laser beam emitting side of the collimator lens 57,
Due to the interference of light, the light intensity unevenness of the projected image appears in a ring shape,
The light intensity in the central portion increases and the light intensity in the peripheral portion decreases. Therefore, the center of the projected image, that is, the center of the irradiation spot becomes easier to visually recognize.

Next, the light receiving window 104 will be described with reference to FIGS. Since the light receiving window 129 has a configuration in which the reflected laser beam detector is omitted from 104, the light receiving window 104 will be described below. Further, the light receiving window described below is a case where an optical system is provided in which a reflected laser beam detector, which is a light receiving unit for receiving a reflected laser beam, is divided.

The light receiving window 104 has a structure in which the reflected light 58 'from the target 61 and the remote control signal light enter.
Also, both are identified and detected.

A light receiving lens 131 is provided in the light receiving window 104. The light receiving lens 131 has a toric lens portion 131a having a different magnifying power in the two directions orthogonal to the optical axis in the central portion and in the peripheral portion. Fresnel lens unit 131
b, the light incident from the light receiving lens 131 is split by the polarization mirror 132, the transmitted laser beam is incident on the reflected laser beam detector 51, and the reflected laser beam is the reflected laser beam. Light enters the detector 76, receives each light, and outputs a light reception signal to the control device 45.

The toric lens unit 131a collects the reflected laser beam from the target 61, and the Fresnel lens unit 131b collects the remote control signal light for remotely operating the machine body. The Fresnel lens portion 131b is provided with a filter that transmits a specific wavelength, and the remote control signal light passes through the Fresnel lens portion 131b and the toric lens portion 131a, but the reflected laser beam passes through only the toric lens portion 131a.

The polarization mirror 132 transmits only polarized light in a predetermined direction. For example, a reflected laser beam whose polarization direction is unchanged is transmitted, and a reflected laser beam whose polarization direction has been changed is reflected. However, as a characteristic of the polarization mirror 132, if it exceeds the incident angle limit, it cannot be used as a polarization mirror. The toric lens unit 131a is a condensing lens in consideration of it, and does not collect much light in the vertical direction in which the polarization mirror 132 is inclined, and collects light in the horizontal direction because it does not exceed the limit angle.

The remote control signal light does not need to be selected by the polarization mirror 132. Therefore, the wavelength of the reflected laser beam is different from that of the reflected laser beam, and the light is transmitted through the polarization mirror 132 and condensed, but a part is reflected. When the remote control signal light is received, the output signals of the two light receivers are added, the operation of the main body is controlled based on the signals, and when the reflected laser beam is received, the difference between the output signals of the two light receivers is received. To calculate the center of the target,
The operation of the main body is controlled based on the signal.

Next, the target 61 is replaced with the one shown in FIGS.
This will be described with reference to FIG.

A cross line 63 is engraved at the center of the target of a vertically elongated target plate 62, and a left reflection surface 64 and a right reflection surface 65 are provided at symmetrical positions about the intersection of the cross lines 63, respectively. The left reflective surface 64 and the right reflective surface 65 have at least the same width in the horizontal direction. When the widths are not the same, the left reflecting surface 64 and the right reflecting surface 65 may be symmetrical with respect to the vertical line and the horizontal line of the cross line.

The left reflecting surface 64 is the target plate 62.
A retroreflective layer consisting of small spheres or small prisms is stretched, and a 1/4 λ birefringent member is laminated on the retroreflective layer to convert the polarization direction of an incident laser beam. It is a polarization conversion reflection surface that reflects light, and the right reflection surface 65 is a target plate 62 on which a retro-reflection layer composed of small spheres or small prisms is attached, and the polarization direction of the incident laser beam is preserved and reflected. It is a polarization preserving reflective surface.

The target plate 62 is installed vertically by a target plate stand 66, and the target plate 62 can be moved up and down with respect to the target plate stand 66. It can be fixed at any position by 67, and the target center can be adjusted to the center of the concrete pipe 2 by installing the target on the concrete pipe 2 as described above.

Further, the target 61 is constructed so as to be greatly expanded and diffused only in the vertical direction.

The target plate 62 is a hollow body made of a transparent material, and a flat plate-shaped space is formed inside, and a large number of columnar optical fibers 68 are continuously arranged in the space. The axis is horizontal. A diffusion sheet 69 is provided on the side of the optical fiber 68 opposite to the incident surface. Then, the laser beam incident by the lens effect only in the vertical direction of the optical fiber 68 is expanded in the vertical direction and further projected on the diffusion sheet 69 to facilitate visual observation, and the transparent surface side of the target plate 62 ( When viewed from the anti-laser irradiation device 1 side), it can be recognized as a line segment extending in the vertical direction,
The range that can be seen from the vertical direction is widened, and it is especially easy to see from above the shaft, and it is not necessary to enter the shaft each time for confirmation. The diffusion sheet 69 may be provided in front of or behind the optical fiber 68, or only on one side, or may be provided on the target plate itself. In addition, 7 in the figure
0 is a bubble tube. Further, if the optical fibers 68 are arranged side by side in a vertical posture, they can be diffused only in the horizontal direction. The target plate easily transmits the wavelength of the laser beam. For example, in the case of a green laser beam, the target member is also transparent green. Further, if a member that easily transmits the wavelength of the laser beam and other wavelengths is used, the color of the laser beam and the target plate are different and the visibility can be improved.

The operation of this embodiment will be described below.

The setting of the reference line by the laser beam when burying a pipe or the like will be described below with reference to the case where the reference line is inclined by a required angle θ with respect to the horizontal.

The laser irradiation device 10 is installed in the vertical hole 3,
The bubble tube 128 provided on the upper surface of the laser irradiation device 10 is adjusted so as to be horizontal with respect to the circumferential direction of the pipe (direction orthogonal to the axial direction of the pipe). At this time, since the vertical laser beam Lv is irradiated from the laser irradiation device 10 in the vertical direction, the installation work can be performed easily and accurately.

Next, the control device 4 is operated from the operation panel 49.
Input the set inclination angle θ into 5. The controller 45 drives the gradient setting motor 38 via the gradient controller 48. The third slide nut 34 is moved upward via the drive gear 37, the driven gear 36, and the third screw 33 to tilt the tilt lever 15 in the direction opposite to the set angle θ. The tilt lever 15 rotates integrally with the tilting frame 42, and the rotation angle of the tilting frame 42 is detected by the encoder 43 and fed back to the gradient controller 48. When the angle detected by the encoder 43 becomes equal to the set angle, the gradient setting motor 38 is stopped.

The controller 45 includes the vertical angle controller 47.
Drive the vertical angle adjusting motor 32 via the drive gear 31, the driven gear 30, and the second screw 27 to move the second slide nut 28, and drive the laser oscillator 11 and the tilt lever via the pin 29. Tilt 15 together. The vertical angle adjusting motor 32 is driven until the angle detected by the tilt sensor 16 becomes zero.

The controller 45 controls the tilt sensor 16
The vertical angle adjusting motor 32 is stopped when the reference level is detected and the laser beam emitted from the laser oscillator 11 is set to the set angle θ. This set angle is displayed on the display unit 50.

After setting the inclination angle, the horizontal angle adjusting motor 2
6 is driven to horizontally scan the laser beam emitted from the laser oscillator 11 by the horizontal angle adjusting mechanism 17, and the laser beam irradiates the intersection of the crosshairs 63 based on the detection of the target 61. Set the horizontal direction of the reference line. The horizontal angle adjusting motor 26 is provided with an encoder, and the angle and the like are converted from the output signal pulse thereof.

If the laser irradiation device is further installed after the gradient setting is completed by the laser irradiation device, it is not necessary to reset the laser oscillation device horizontally. No matter what angle the main body is installed, the previously set angle can be obtained by the encoder, so the difference from the newly set angle can be calculated, and when the tilt sensor reaches the reference level, It becomes the set angle.

The gradient setting motor 38 is a pulse motor,
Needless to say, a motor such as a DC motor or a servo motor can be used, and further, the encoder 43 may be mechanically connected to the tilting frame 42, and the horizontal axis 1
It may be connected to the shaft 2 via a shaft joint, or may be connected via a motion transmitting means such as a gear. In addition, the encoder 43
Since the actual inclination angle is detected, the gradient may be displayed on a gradient setting indicator provided at a required position of the laser irradiation device. Further, the tilt sensor 16 includes a tilting frame 42.
However, the tilt lever 15 or the like may be provided at a position where the tilt lever 15 and the tilt lever 15 are integrally tilted. Further, the encoder 43 may be either an optical type or a magnetic type.

Next, the present invention has a function of detecting the center of the target 61, and this center detection function enables an automatic adjustment function when the irradiation position of the laser beam is moved due to, for example, vibration. .

First, the laser irradiation device 10 is horizontally installed at a starting point, and the target 61 is installed at a target position. The laser irradiation device 10 is operated to irradiate the laser beam 58, and the left and right of the irradiation direction and the inclination are roughly manually set. After setting, activate automatic adjustment.

The horizontal angle adjusting motor 26 is rotated, the first screw 20 is rotated, and the laser oscillation device 11 of the laser irradiation device 10 is rotated about the vertical shaft 14 via the first slide nut 21 and the pin 23. It is reciprocally rotated in the horizontal direction, and the parallel laser beam 58 is horizontally reciprocally scanned. In horizontal scanning, reciprocal scanning is performed while gradually moving upward or downward. If it is not detected, the scanning range is expanded and scanning is performed again.

When the laser beam 58 crosses the target 61, the reflected light 5 from the left reflecting surface 64 and the right reflecting surface 65
8'is incident on the laser oscillator 11, and the reflected laser beam detector 51 and the reflected laser beam detector 76 detect the reflected light 58 '.

The left reflecting surface 64 has a ¼λ birefringent member on its surface and is a conversion reflecting surface that converts and reflects the polarization direction of the laser beam, while the right reflecting surface 65 is the polarization direction of the incident laser beam. Since it is a polarization-preserving reflection surface that preserves and reflects light, the polarization direction of the polarizing plate 72 is changed to the laser beam emitting section 55.
When the polarization direction of the laser beam when irradiated from the above is adjusted and the polarization direction of the polarizing plate 75 is adjusted to the polarization direction when the polarization is converted, the reflected light 58 'reflected by the left reflecting surface 64 is The polarizing plate 75 transmits but is blocked by the polarizing plate 72, only the reflected laser beam detector 76 detects the reflected laser beam, and the reflected light 58 'reflected by the right reflecting surface 65 is the polarizing plate. Only 72 passes through, is blocked by the polarizing plate 75, and only the reflected laser beam detector 51 detects the reflected laser beam.

When the received light signals from the reflected laser beam detector 51 and the reflected laser beam detector 76 are emitted at a predetermined interval and with a predetermined pulse width, the reflected light from the target 61 is generated. Judge that there is. Laser irradiation device 1
Disturbance light also enters 0, and the reflected laser beam detector 5
1. It is expected that the reflected laser beam detector 76 may detect it, but the probability of detection under the above-mentioned conditions is extremely low, so the detection reliability is high. Further, the center of the target is detected from the time difference or the angle difference of the light received by the two reflected laser beam detectors 51 and 76.

When the signals from the reflected laser beam detector 51 and the reflected laser beam detector 76 are pulses having the same width at a predetermined interval, the controller 45 determines that the received reflected light is from the target 61. When it is recognized that there is one, the horizontal barycentric position for the two received light signals, that is, the intersection of the cross lines 63 in the horizontal direction is calculated. The calculation result is the control device 45.
And is displayed as a horizontal angle on the display unit 50. Further, the control device 45 controls the horizontal adjustment controller 46 to drive the horizontal angle adjustment motor 26 based on the calculation result, and sets the irradiation direction of the laser beam 58 to the calculated direction, and matches the horizontal center of gravity position. Let

When the position of the horizontal center of gravity is calculated, the angular difference between the left reflecting surface 64 and the right reflecting surface 65 in the irradiation direction of the laser beam is obtained. Further, since the distance between the left reflecting surface 64 and the right reflecting surface 65 is a known value, the distance from the laser irradiation device 10 to the target 61 depends on the angle difference and the distance between the left reflecting surface 64 and the right reflecting surface 65. The distance can be measured.

Next, the measurement of the inclination angle of the concrete pipe 2 by the laser irradiation device 10 according to the present invention will be described with reference to FIG.

The target 61 is installed at one end of the concrete pipe 2 and the laser irradiation device 10 is installed at the other end. The target 61 has a structure such that, when the target 61 is installed on the concrete pipe 2, the irradiation center (the intersection of the cross lines 63) coincides with the center of the concrete pipe 2.

Similarly, the laser irradiation device 10 includes the support leg 4
The laser beam irradiation center of the laser irradiation device 10 is installed on the concrete pipe 2 through 1 and substantially coincides with the center of the concrete pipe 2.

When the laser irradiation device 10 is operated, the laser irradiation device 10 automatically detects the irradiation center of the target 61 by the above-mentioned operation, and matches the irradiation position of the laser beam with the irradiation center of the target 61. At this time, the irradiation direction of the concrete pipe, the laser beam, and the inclination angle of the tilt sensor match the inclination of the concrete pipe 2.

Next, the tilt setting motor 38 is driven so that the tilt sensor is horizontal, that is, the tilt controller 48 is driven, and the detection result of the tilt sensor 16 is set to the horizontal position. The angle from the state where the laser beam irradiates the irradiation center of the target 61 until the detection result of the tilt sensor 16 indicates a horizontal position is detected by the encoder 43, and the detected result is the inclination of the concrete pipe 2. The angle of inclination is displayed on the display unit 50.

Thus, the inclination angle is measured, the measurement result can be easily known from the display unit 50, and the measurement operation only needs to place the laser irradiation device 10 and the target 61 on the concrete pipe 2. It can be measured by a human operator. Further, since the remote operation can be performed from two directions, that is, the horizontal direction and the vertical direction, the workability is remarkably improved, and further, the distance measurement can be performed together as described above.

Next, an embodiment of the vertical vertical beam will be described with reference to FIGS.

The pendulum holder 1 is provided below the tilting frame 42.
35 is hung vertically via a pin 136 in a direction perpendicular to the optical axis of the laser oscillator 11. The pendulum holder 135 is integrally provided with a beam splitter 39 and a reflecting mirror 53, faces the beam splitter 39, and is provided with a laser beam emitting section 52 on the tilting frame 42.
The laser beam emitted from the laser beam emitting section 52 is irradiated vertically. Further, since the pendulum holder 135 constantly hangs down in the vertical direction due to gravity, the laser beam emitted from the laser beam emitting section 52 is irrespective of the inclination of the laser irradiation device 10.
The irradiation is performed in a divided manner via 9 so that the irradiation is always performed in the vertical direction.

Further, it is known that the visibility is improved by making the color of the laser beam green, and the light emitting section 137 emitting the green laser beam is fixed to the bottom surface of the casing 102 so that the light from the light emitting section 137 is emitted. The laser beam is guided to the optical fiber 138 and emitted from the laser oscillator 11. The green laser beam is usually excited by a laser beam such as an infrared laser beam, frequency-converted, and changed to green. The light emitting unit 137 that excites and emits the laser beam generates a large amount of heat, and when incorporated in a small device, the influence of heat cannot be ignored. In this device, the light emitting unit 137 is directly attached to the housing 102, the heat from the light emitting unit 137 is transferred to the housing 102 by heat conduction, the housing 102 is used as a radiator, and the optical fiber 138 is further used.
The laser beam from the laser is guided by the optical fiber 138 and the heat source is separated from the optical system of the laser oscillator 11, thereby preventing the influence of heat. Therefore, it is possible to use a laser light source having a high heat generation property or a laser light source that requires temperature stability, and since it is not necessary to consider the influence of heat, the size of the housing can be reduced.

The output end of the optical fiber 138 will be described with reference to FIGS. The output end of the optical fiber 138 is guided to the laser beam emitting portion, and the output end is fitted into the holder 130 at a required angle with respect to the laser beam emitting optical axis. The optical fiber 138 is a constant polarization fiber that transmits light while preserving the polarization direction. The optical fiber 138 is close to the end face of the optical fiber 138, and the polarization mirror 132.
A mirror 133 is sequentially arranged on the back side of the polarizing mirror 132, and a polarizing plate 134 and a monitor light receiver 139 are provided to face the mirror 133. Among the laser beams emitted from the output end of the optical fiber 138, the transmitted light that has passed through the polarization mirror 132 is reflected by the mirror 133 and received by the monitor light receiver 139. The linearly polarized laser beam emitted from the laser light source is guided by the optical fiber 138 while preserving the polarization direction and emitted toward the polarization mirror 132.

The polarization mirror 132 almost reflects the laser beam, but transmits a few% as the monitor light. The laser beam output from the optical fiber 138 is S-polarized, but it also contains some P-polarized light. The polarization mirror 132
In the case, P polarized light is transmitted together with S polarized light of several%. The mirror 133 reflects the transmitted polarized light toward the light receiver. A polarizing plate 134 is arranged between the mirror 133 and the light receiver 139 and transmits only S-polarized light. Since the emitted laser beam is S-polarized light, S-polarized light is monitored. The monitored information is fed back to the light emission drive of the laser light source, and the visibility and output of the emitted laser beam are stabilized.

FIG. 26 is an optical path diagram showing the relationship between the arrangement of the polarization mirror and the light source. When the relation of the mounting error to the polarization mirror 132 on the optical path is replaced with the movement of the light source L, the movement of the light source is the movement of the condensing point with reference to the optical axis. The larger the distance between the light source and the polarization mirror 132, the greater the movement of the light source.
To reduce the movement amount, it is necessary to reduce the distance between the light source L and the polarization mirror 132. When the light source L does not move, the movement of the light source L is replaced by the tilt angle of the polarization mirror. Therefore, it is necessary to reduce the distance between the light source L and the polarization mirror in order to reduce the influence of the attachment error of the polarization mirror and focus the laser beam on the optical axis. In this device, a polarization mirror is arranged near the fiber end.

Next, by providing a liquid crystal shutter on the surface of the reflecting surface, it is possible to prevent noise reduction in the light receiving state of the reflected light 58 '.

A liquid crystal shutter is further attached to the surfaces of the left reflection surface 64 and the right reflection surface 65 of the target 61, and a shutter control circuit for driving the respective liquid crystal shutters at different frequencies is provided at a desired position of the target 61, for example, the back surface. Set up. Further, the reflected laser beam detector 51 is provided with an electric filter tuned to the frequency of the liquid crystal shutter.

When the liquid crystal shutter is driven, the reflected light is blocked in accordance with the opening and closing of the liquid crystal shutter and is modulated by the driving frequency of the liquid crystal shutter. Further, the reflected laser beam detector 51 can detect only the reflected light from the target 61 by passing through the electrical filter, and the noise from other unnecessary reflectors can be removed and the detection accuracy can be improved. improves. The liquid crystal shutters provided on the left reflecting surface 64 and the right reflecting surface 65 may be opened / closed at the same frequency or may be opened / closed at different frequencies. When opening and closing at different frequencies, the left reflecting surface 64 and the right reflecting surface 65 can be individually recognized.

It should be noted that three or more reflecting surfaces of the target 61 may be provided along the scanning line, a desired pattern is formed by the reflecting surface, and the pattern is recognized from the light receiving signal obtained by scanning, and the light receiving signal is It may be so arranged that the target center is recognized and the target center is discriminated from the pattern.

FIG. 27 shows another target 90 used in this embodiment.

The target 90 is the target 6 described above.
1, the left reflecting surface 64, the right reflecting surface 65, the lower reflecting surface 79,
The upper reflecting surface 80 is provided, and the surface of the lower reflecting surface 79 is further ¼
A λ birefringent member is provided.

The parallel laser beam 58 emitted from the laser irradiating device 10 is reflected by the left reflecting surface 64 and the lower reflecting surface 79 of the target 90, and reflected light 58 having a polarization direction different from that of the parallel laser beam 58 emitted. ′, And the right reflecting surface 65 and the upper reflecting surface 80 are reflected with their polarization directions preserved.

By scanning in the horizontal direction as described above,
The target center in the horizontal direction can be detected. Next, when the laser beam is operated in the vertical direction by the same procedure, the lower reflecting surface 7
9. The center of gravity of the vertical direction can be calculated by the reflected light from the upper reflecting surface 80 to detect the center of the target, and the center of the target 90 can be detected based on both detection results.

Next, examples of still other targets will be described with reference to FIGS.
This will be described with reference to FIG.

The target 91 shown in FIG. 28 is the reflecting surface 8
1 and 82 are symmetrical right-angled triangles and inverted right-angled triangles, and a 1 / 4λ birefringent member is attached to one reflecting surface 81.

The reflected light 58 'from the target 91 is 2
And the left and right pulse widths change depending on the scanning position of the laser beam, and the positions where the left and right pulse widths are equal are the positions where the intersections of the cross lines 63 pass, and the center of gravity of the left and right pulse widths is The position of the cross wire 63 in the horizontal direction can also be detected by calculation. Therefore, the target 91
While scanning in the horizontal direction by using, the position of the intersection of the cross line 63
The irradiation center can be detected.

The target 92 shown in FIG. 29 is basically the same as the target 91, and is symmetrical with an erected right angle 3 with a strip-shaped non-reflective surface 83 having reflective surfaces 81 and 82 provided along a diagonal line. The target plate 92 is formed in a square shape and an inverted right-angled triangular shape, and is integrally provided at one corner of the target plate 92. A ¼λ birefringent member is attached to the reflecting surface 81. Reflective surface 8
1, 82, the distance between the non-reflective surface 83 and the cross line 63 is known, so that the intersection point position of the cross line 63 can be determined by determining the centers of the reflective surfaces 81, 82 and the non-reflective surface 83.

Targets 93 and 9 shown in FIGS.
Reference numeral 4 indicates that all of the plurality of reflection surfaces are polarization-preserving reflection surfaces or polarization conversion reflection surfaces. In this case, the target is accurately recognized by detecting the pulse width and pulse interval of the reflected light. can do. In this case, the reflected laser beam detector 51 and the reflected laser beam detector 7
Either one of 6 can be omitted.

A target 93 shown in FIG. 30 is provided with an upright right-angled triangular reflective surface 81 and an inverted right-angled triangular non-reflective surface 84 in contact with each other, and a strip-shaped reflective surface along the non-reflective surface 84. 85 is provided. When the laser beam horizontally scans the reflecting surface 81, the non-reflecting surface 84, and the reflecting surface 85, pulse-like reflected light is generated from the reflecting surface 81 and the reflecting surface 85 of the target 93.
1, the width of the pulse of the reflected light and the reflection surface 8 from the pulse.
The irradiation center of the target 93 can be detected in the same manner as described above by detecting the state where the width of the reflected light by 5 (the width of the non-reflecting surface 84) is the same.

A target 94 shown in FIG. 31 has three strip-shaped reflecting surfaces 86 arranged in an N-shape. When a laser beam scans the target 94 in the horizontal direction, the target 94 has a number of three. When there is pulsed reflected light of the same width, and the intervals of the pulsed reflected light of the three are the same, it is the position that passes through the intersection of the cross lines 63. The irradiation center can be detected.

If the shape of the reflecting surface has a maximum value and a minimum value and the extreme value and the target center are associated with each other, the control unit 45 detects the extreme value to detect the target center. can do.

Next, referring to FIG. 32, the laser irradiation device 10
6 shows a state in which the trivet stand 140 is supported when the is installed in a manhole or the like other than the concrete pipe 2.

A handle 141 is provided in the laser irradiation device 10, the handle 141 is connected to a clamp 142 so as to be tiltable in the vertical direction, and the clamp 142 is slidably fitted to a column 143 of the trivet stand 140. To do.
The clamp 142 is fixed by the fixing knob 144.
It is fixed to 43.

Loosen the fixing knob 144 and move the clamp 142 up and down to adjust in the height direction, and
The posture of the laser irradiation device 10 is adjusted by loosening the connection between the clamp 142 and the clamp 142 and tilting.

[0114]

As described above, according to the present invention, it is possible to perform remote control from the front and rear and the upper and lower directions of the laser irradiating device, and to use a laser beam emitting section that generates a large amount of heat, and to use a vertical laser. The light beam is always radiated correctly in the vertical direction by the correction mechanism, and the laser beam in the vertical direction is observed through the density filter, so it is safe, and the image of the laser beam etc. has a high luminous intensity at the center part and the center can be easily identified, and the accuracy is improved. However, the lens of the light receiving part facilitates detection when two lights, the remote control signal light and the laser beam, enter, and furthermore, a short circuit is prevented even if rainwater or the like enters between the main body part and the battery pack. Since the background color of the target plate and the color emitted by the laser beam are different, excellent effects such as improved recognition are exhibited.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an outline of an embodiment of the present invention.

FIG. 2 is a perspective view of a laser reference level device according to the previous embodiment.

FIG. 3 is a front perspective view of the laser irradiation apparatus according to the previous embodiment.

FIG. 4 is a rear perspective view of the laser irradiation apparatus according to the previous embodiment.

FIG. 5 is a plan view of the laser protection cover according to the embodiment.

FIG. 6 is a cross-sectional view of a laser protection cover according to the previous embodiment.

FIG. 7 is a cross-sectional view of a battery pack portion of the laser reference level device according to the previous embodiment.

FIG. 8 is a side view of a main part of the laser irradiation apparatus according to the previous embodiment.

FIG. 9 is a side sectional view of a main part of the laser irradiation apparatus according to the previous embodiment.

FIG. 10 is a front sectional view of a main part of the laser irradiation apparatus according to the embodiment.

FIG. 11 is a side sectional view of a main part of the laser irradiation apparatus according to the previous embodiment.

12 (A), (B) and (C) are operation explanatory views of the embodiment.

FIG. 13 is a control block diagram of the embodiment.

FIG. 14 is a block diagram showing still another example of the optical system of the laser oscillator provided in the laser reference level setting device of the previous embodiment.

FIG. 15 is an explanatory diagram showing a luminous intensity distribution of a projected image when a diaphragm is provided in the projection optical system of the previous embodiment.

FIG. 16 is a side view illustrating a light receiving window of the projection optical system according to the previous embodiment.

FIG. 17 is a plan view illustrating a light receiving window of the projection optical system according to the previous embodiment.

FIG. 18 is a front view of the target.

FIG. 19 is a side view of the target.

FIG. 20 is a rear view of the target.

FIG. 21 is a partial cross-sectional view of a target.

FIG. 22 is a front cross-sectional view showing the main parts of another embodiment of the present invention.

FIG. 23 is a side sectional view showing a main part of another embodiment of the present invention.

FIG. 24 is a partially enlarged view of a laser beam emitting unit according to another embodiment of the same.

FIG. 25 is a skeleton view of the laser beam emitting portion of the same.

FIG. 26 is an optical path diagram of the laser beam emitting unit of the same.

FIG. 27 is an explanatory diagram showing another example of the target.

FIG. 28 is an explanatory diagram showing another example of the target.

FIG. 29 is an explanatory diagram showing another example of the target.

FIG. 30 is an explanatory diagram showing another example of the target.

FIG. 31 is an explanatory diagram showing another example of the target.

FIG. 32 is a perspective view showing an example of a supporting form of a laser irradiation device.

FIG. 33 is an explanatory diagram of a conventional tunnel tilt angle measuring method.

[Explanation of symbols]

 1 Laser Irradiation Device 2 Concrete Pipe 10 Laser Irradiation Device 11 Laser Oscillation Device 16 Tilt Sensor 17 Horizontal Angle Adjustment Mechanism 18 Vertical Angle Adjustment Mechanism 19 Tilt Sensor Tilt Mechanism 43 Encoder 45 Controller 48 Gradient Controller 50 Display 61 Target 90 Target 91 Target 92 Target 93 Target 94 Target 104 Light receiving window 106 Laser protection cover 109 ND filter 116 Contact 118 Waterproof packing 120 Moving contact 129 Light receiving window 135 Pendulum holder 138 Optical fiber 140 Trivet stand

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Kunihiro Hayashi No. 75-1 Hasunumacho, Itabashi-ku, Tokyo Topcon Co., Ltd. (72) Inventor Toshikazu Adegawa No. 75 Hasunuma-cho, Itabashi-ku, Tokyo Topcon Co., Ltd. Within

Claims (13)

[Claims] 1. A laser irradiation device and a target, wherein the target has a reflecting surface associated with a predetermined position on the target, and the laser irradiation device emits a laser beam rotatably supported. A laser oscillating device having a means and a means for receiving a reflected laser beam, a driving device for rotating at least a laser beam emitting device of the laser oscillating device, and a laser beam receiving device for receiving a reflected laser beam from a reflecting surface of the target. A laser reference level device, comprising: a controller that controls the drive device so as to direct a laser beam to a predetermined position of the target. 2. The laser reference level device according to claim 1, wherein the remote receiver is provided before and after the laser irradiation device. 3. The laser reference level device according to claim 1, wherein at least one of a front surface and a rear surface of the laser irradiation device is inclined, and a display portion is provided on the inclined surface. 4. The laser reference level according to claim 1, wherein the laser beam emitting means comprises a projection optical system and a laser beam emitting section, and the laser beam from the laser beam emitting section is guided to the projection optical system by an optical fiber. apparatus. 5. The laser reference level device according to claim 4, wherein the laser reference level device is a laser beam emitting means having a reflecting means arranged near the fiber output end for reflecting the laser beam and splitting a part thereof as monitor light. 6. The laser reference level device according to claim 1, wherein the means for emitting the laser beam has a diaphragm to increase the light intensity at the central portion of the projected image. 7. A correction mechanism for directing a laser beam from at least a laser beam emitting part of an optical system of the vertical beam emitting part, wherein the laser irradiation device has a vertical beam emitting part for emitting a laser beam in the vertical direction. Claim 1 provided with
Laser reference level device. 8. The laser irradiation device has a vertical beam emitting part for emitting a laser beam in a vertical direction, and a laser protection cover provided with a density filter is provided on an optical path of the vertical beam of the laser irradiation device main body. 1. Laser reference level device. 9. The laser reference level device according to claim 2, wherein the remote reference level device is a remote receiving unit that is composed of at least two different condensing lenses and that has a light receiving unit that also receives the reflected laser beam and the remote scanning light. 10. A remote receiving device comprising a different condenser lens divided into at least two and at least one of which has a light receiving portion which transmits a specific wavelength and also receives a reflected laser beam and a remote scanning light. 3. The laser reference level device of claim 2, which is a part. 11. A detachable battery pack is provided in a main body portion, and a main body side contact is provided in the main body portion and a battery pack side contact point is provided in the battery pack, and either one of the main body side contact point and the battery pack side contact point is provided. 2. The laser reference level device according to claim 1, wherein a waterproof packing is provided in the housing, and the waterproof packing accommodates and seals the main body side contact and the battery pack side contact when the battery pack is mounted. 12. The laser reference level device according to claim 1, wherein the target plate of the target is different in color from the laser beam that transmits a plurality of wavelengths including the wavelength of the laser beam. 13. The laser reference level device according to claim 1, wherein the target plate of the target has a light-transmitting property, and expands the irradiated laser beam in one direction.