JPH0777422A - Laser gradient setting device - Google Patents

Abstract

(57) [Abstract] [Purpose] Make it possible for one person to easily position the laser gradient setting device. A laser gradient setting device that emits a gradient reference laser beam L is configured to emit a vertical reference laser beam 12, and the position of the laser gradient setting device 11 is set by the vertical reference laser beam. . As a result, the position of the laser gradient setting device can be easily set by one person without using swinging.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A civil standard construction requires a horizontal reference line or a reference line inclined by a required angle with respect to the horizontal. A laser gradient setting device sets 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.

As a typical work for burying a concrete pipe or the like in the soil, there is a work method in which the ground is dug down, concrete pipes are sequentially installed in the dug down trenches, and backfilled.

[0005] The ground is dug deeper than the depth at which the concrete pipe is installed, and the concrete pipe is installed on a temporary table provided at the bottom of the groove for each constant straight line section.

Such concrete pipes are used for water supply and sewerage, etc.
It serves as a flow path for flowing a liquid substance, and is installed with a certain degree of inclination so as not to bend. When the buried concrete pipe meanders vertically and horizontally, the liquid substance stays, becomes clogged, or leaks into the ground, and cannot function as a flow path. Therefore, burying the concrete pipe requires an appropriate reference line.

A laser beam is convenient as such a reference line, does not sag even at a long distance like a thread, does not become an obstacle during work, and further cuts by interfering with work or concrete pipes. It will not be done.

The laser gradient setting device forms a reference line when a concrete pipe is installed.

A conventional laser gradient setting device will be described with reference to FIGS.

The conventional laser gradient setting device 1 emits a laser beam that serves as a reference line in the horizontal direction when it is installed horizontally. If the laser beam is aligned with the horizontal, the laser beam will be aligned with the horizontal reference line. Is inclined by a required angle to form a reference line having a slope.

For each fixed straight section, a vertical hole 3 having a depth equal to or larger than the depth at which the concrete pipe is installed is drilled at the starting point for burying the concrete pipe 2, and a buried groove 4 continuous with the vertical hole 3 is provided at a depth at which the concrete pipe is installed. Excavate above. The laser gradient setting device 1 is installed in the vertical hole 3 and emits a laser beam with 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 laser beam L.

When the axis of the concrete pipe 2 matches the reference laser beam L, the embedding groove 4 is backfilled to embed the concrete pipe 2.

The position of the laser gradient setting device 1 in the horizontal direction must be accurately set when initially set.
Conventionally, the horizontal position setting of the laser gradient setting device 1 is
A support base 6 is provided above the vertical hole 3, a transit 7 is installed on the support base 6, and a swing 8 is made from the transit 7.
To set a known point 10. Further, a laser gradient setting device is installed in the vertical hole 3, the plumb bob 8 is aligned with the center of the laser gradient setting device, and a plumb bob 9 is drooped from the laser gradient setting device 1, and the plumb bob 9 is known. It was done by making it coincide with point 10.

[0014]

In the conventional method of setting the position using the plumb bob, the work of two bobbin swings, adjusting the length of the thread, and the like, the plumb bob from the transit, and the laser gradient setting device are required. It is necessary to make repeated adjustments so that the swinging movements from to exactly match the reference points, resulting in poor workability and extremely complicated work. Also, when there is a displacement during the construction due to vibration caused by the passage of vehicles,
When the construction was temporarily suspended and then resumed, or when periodical checks were performed, the same work as above had to be repeated, and a great deal of time was spent.

In view of the above situation, the present invention is to enable the laser gradient setting device to be easily aligned.

[0016]

The present invention is characterized in that in a laser gradient setting device for emitting a reference laser beam having a gradient, a reference laser beam in the vertical direction is emitted.

[0017]

The position of the laser gradient setting device is set by the reference laser beam in the vertical direction.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the same parts as those shown in FIG. 5 are designated by the same reference numerals.

The laser gradient setting device 11 emits a laser beam 12 not only in the horizontal direction but also in the vertical direction. The laser beam 12 emitted downward is matched with a known point 10 and the laser beam emitted upward. By aligning 12 with the reference point of the transit 7, the laser gradient setting device 11 can be easily aligned.

Instead of causing the laser beam 12 to coincide with the reference point of the transit 7, the target 13 may be set at the reference position so that the laser beam 12 coincides with the target 13.

Next, the laser gradient setting device 11 will be described with reference to FIGS.

An inverted concave hanging frame 15 is provided on the box-shaped outer frame 14, and a pair of spherical seats 16 having a horizontal axis are provided inside the hanging frame 15 so as to face each other.

Spherical shafts 18 are provided on both side surfaces of the reference laser beam emitter 17, and the spherical shaft 18 and the spherical seat 16 are fitted to each other, whereby the reference laser beam emitter 17 is mounted on the suspension frame 15. On the other hand, it is provided so as to be rotatable in three axis directions.

The spherical shaft 18 has the spherical seat 1 at the tip thereof.
6 is formed into a spherical surface, a base portion is formed with a columnar portion, and an inverted concave swing frame 19 is rotatably provided on the columnar portion. Pins 20 and 21 are provided so as to project in two horizontal directions from the spherical surface of the spherical shaft 18.

A horizontal rotation drive unit 22 is provided on the pin 20 side of the suspension frame 15, and a torsion drive unit 23 is provided on the pin 21 side. In addition, a pin 24 that matches the reference laser beam L from the rear end face of the reference laser beam emitter 17.
And the elevation drive unit 25 is provided on the pin 24 side.

The left-right rotation drive unit 22 is a gear box 26 fixed to the suspension frame 15, and the guide shaft 2 is provided horizontally from the gear box 26.
7, screw shaft 28, the screw shaft 2
8, a slider 29 that is slidably fitted to the guide shaft 27 and is slidably fitted to the guide shaft 27, and the screw shaft 28.
And a left-right adjustment motor 30 for rotating the motor through the gear box 26. The pin 29 is attached to the slider 29.
An engagement pin 31 slidably engaged with the spring 3 is provided upright so that the pin 20 is always in contact with the engagement pin 31.
It is urged to the right in FIG. 2 by 2.

The screw shaft 28 is rotated by the rotation of the left-right adjustment motor 30, and the slider 2 is rotated.
9 is displaced in the horizontal direction, and the displacement in the horizontal direction of the slider 29 is transmitted to the pin 20 through the engaging pin 31, and the reference laser beam emitter 17 is integrated with the swing frame 19 in the left-right direction. Rotate to.

The torsion drive unit 23 includes a gear box 33 fixed to the suspension frame 15, a guide shaft 34 vertically extending from the gear box 33,
A screw shaft 35 (not shown), a slider 39 screwed to the screw shaft 35 and slidably fitted to the guide shaft 34, and a torsion drive motor for rotating the screw shaft 35 via the gear box 33. Has 36. An engaging pin 37 that slidably engages with the pin 21 is erected on the slider 39,
The pin 21 is urged downward in FIG. 3 by a spring 38 so as to always contact the engagement pin 37.

Then, the screw shaft 35 is rotated by the rotation of the torsion drive motor 36, the slider 39 is displaced in the vertical direction, and the vertical displacement of the slider 39 is caused by the engagement pin 37. The reference laser beam emitter 17 is transmitted to the pin 21 and twists the reference laser beam emitter 17 integrally with the swing frame 19.

The elevation drive unit 25 includes a gear box 40 fixed to the outer frame 14 via a bracket 67, a guide shaft 41 vertically extending from the gear box 40, and a screw shaft 42 (not shown). A slider 4 screwed onto the screw shaft 42 and slidably fitted onto the guide shaft 41
3, the screw shaft 42 to the gear box 4
It has an elevation drive motor 44 that rotates through 0. An engagement pin 45 that slidably engages with the pin 24 is erected on the slider 43, and the pin 24 engages with the engagement pin 4
5, the spring 68 urges it downward in FIG.

Then, the screw shaft 42 is rotated by the rotation of the elevation drive motor 44, the slider 43 is displaced in the vertical direction, and the vertical displacement of the slider 43 is caused by the engagement pin 45. The reference laser beam emitter 17 is transmitted to the pin 24, and the reference laser beam emitter 17 is elevated together with the swing frame 19.

A pin 46 extending parallel to the pin 20 is provided on the rear end side of the swing frame 19, and the reference laser beam emitter 17 and the swing frame 19 are relatively rotated via the pin 46. An angle setting unit 47 is provided on the side surface of the reference laser beam emitter 17.

The angle setting unit 47 is a gear box 4 fixed to the side surface of the reference laser beam emitter 17.
8, a guide shaft 49 vertically extending from the gear box 48, a screw shaft 50, and the guide shaft 4 screwed on the screw shaft 50.
9 has a slider 51 slidably fitted to the shaft 9 and an angle setting motor 52 for rotating the screw shaft 50 via the gear box 48.
Has an encoder 69 (described later). The slider 51 is provided with an engagement pin 53 that slidably engages with the pin 46, and the pin 46 is urged downward in FIG. 2 by a spring 54 so that the pin 46 is always in contact with the engagement pin 53. .

Then, the screw shaft 50 is rotated by the rotation of the angle setting motor 52, the slider 51 is displaced in the vertical direction, and the vertical displacement of the slider 51 is caused by the engagement pin 53 through the pin 53. Then, the rocking frame 19 is lifted up with respect to the reference laser beam emitter 17.

A vertical beam emitting unit 55 is provided at the lower end of the swing frame 19.

The vertical beam emitting unit 55 will be described.

A laser beam emitting section 56 is provided on one of the vertical inner wall surfaces facing the swing frame 19, and a reflecting mirror 57 is provided on the other vertical inner wall surface facing the laser beam emitting section 56. The reflecting mirror 57 and the laser beam emitting section 5
6, a beam splitter 58 is provided between the beam splitter 58 and the laser beam emitting unit 56, and the laser beam emitted by the laser beam emitting unit 56 is transmitted through the laser beam emitting unit 17 and the reference laser beam emitting unit 17.
The laser beam 12 passing through the rotation center (center of the spherical surface of the spherical axis 18) is split and reflected.

The laser beam 12 is provided above and below the swing frame 19, the suspension frame 15 and the outer frame 14.
Through holes 59, 60, 61, 62 through which the Further, an inclination sensor 63 parallel to the pin 20 and an inclination sensor 64 perpendicular to the inclination sensor 63 are provided on the upper surface of the swing frame 19. The front surface of the outer frame 14 has a through hole 65 through which the reference laser beam L passes,
Support legs 66 are provided on the lower surface of the outer frame 14. The support leg 66 has an adjusting function, and the outer frame 14
The horizontal adjustment of the horizontal position can be roughly adjusted.

The left / right adjustment motor 30 of the left / right rotation drive unit 22 includes a left / right adjustment controller 71 and a torsion drive unit 2.
The torsion drive motor 36 of No. 3 is driven by the torsion controller 72, the elevation drive motor 44 of the elevation drive unit 25 is driven by the elevation controller 73, and the angle setting motor 52 of the angle setting unit 47 is driven by the angle controller 74. The rotation angle signal from the encoder 69 is input to 74.

The left-right adjustment controller 71 and the twist controller 7
2, the elevation controller 73 and the angle controller 74 are respectively controlled by the control device 70, and the detection signals from the tilt sensor 63 and the tilt sensor 64 are input to the control device 70,
An operation panel 75 is connected to the control device 70.

The operation will be described below.

First, the laser gradient setting device 11 is installed in the vertical hole 3, the horizontal coarse adjustment is performed by the support legs 66, the switch of the operation panel 75 is operated, and the operation start is input to the control device 70.

First, the angle setting motor 52 is driven, and the mechanical reference positions of the reference laser beam emitter 17 and the oscillating frame 19, that is, the tilt sensor 63 and the tilt sensor 6.
4 and the reference laser beam emitter 17
Is adjusted to a position where the optical axes of the laser beams are parallel.

Next, the tilt sensor 63 and the tilt sensor 6
Based on the detection result from 4, the left / right adjustment controller 71, the torsion controller 72, and the elevation / lowering controller 73 are issued with a control command such that the detection results of the tilt sensor 63 and the tilt sensor 64 are zero, that is, horizontal. The left-right adjustment controller 71 according to the control command,
The torsion controller 72 and the elevation / depression controller 73 drive the left / right adjustment motor 30, the torsion drive motor 36, and the elevation / depression drive motor 44.

When the tilt sensor 63 and the tilt sensor 64 are horizontal, the reference laser beam L emitted from the reference laser beam emitter 17 is horizontal, and the laser beam 12 directed vertically from the beam splitter 58 is vertical. Match.

The horizontal position of the laser gradient setting device 11 is adjusted so that the known point 10 of the laser beam 12 coincides with the reference point of the transit 7 or the target 13 (see FIG. 1). Since the position adjustment of the laser gradient setting device 11 by the laser beam 12 may be performed by adjusting the posture of the laser gradient setting device 11 itself, it requires one person's work.

When it is desired to make the reference laser beam L have a gradient, the gradient is set and input from the operation panel 75 to the control device 70. The control device 70 issues a drive command to the angle controller 74, and the angle controller 74 inputs a drive pulse corresponding to the drive command to the angle setting motor 52. The angle setting motor 52 rotates in proportion to the number of drive pulses,
The actual rotation amount is detected by the encoder 69, and the rotation amount of the angle setting motor 52 is monitored. Thus, only the swing frame 19 is tilted.

When the tilting operation of the rocking frame 19 is completed, a completion signal is input to the control device 70, and the rocking frame 19 is leveled on the left and right adjustment controller 71, the twist controller 72, and the elevation controller 73. The control command is issued.

Since the operation for making the swing frame 19 horizontal is the same as that described above, the description thereof will be omitted.

When the oscillating frame 19 becomes horizontal again, the reference laser beam L emitted from the reference laser beam emitter 17 is set to a required gradient.

By adjusting the reference laser beam L, the concrete pipe 2 can be installed at a desired gradient without bending.

In the above embodiment, the laser beam emitting section 56 is used.
Although the laser beam 12 is separately provided and the laser beam 12 is emitted, the reference laser beam L emitted from the reference laser beam emitter 17 may be divided and used as the laser beam 12.

[0054]

As described above, according to the present invention, the position setting of the laser gradient setting device can be performed by one person, and the workability is remarkably improved without shaking like swinging.

[Brief description of drawings]

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

FIG. 2 is a vertical sectional view of the embodiment.

FIG. 3 is a front sectional view of the embodiment.

FIG. 4 is a control block diagram of the embodiment.

FIG. 5 is a side view of a conventional example.

FIG. 6 is a front view of a conventional example.

[Explanation of symbols]

 11 Laser Gradient Setting Device 22 Left / Right Rotation Driving Unit 23 Twisting Driving Unit 25 Depression Driving Unit 47 Angle Setting Unit 55 Vertical Beam Emitting Unit 56 Laser Beam Emitting Section 57 Reflector 58 Beam Splitter 63 Tilt Sensor 64 Tilt Sensor

Claims (1)

[Claims] 1. A laser gradient setting device for emitting a gradient reference laser beam, wherein the laser gradient setting device is configured to emit a vertical reference laser beam.