JP3435788B2 - Laser floodlight - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser projecting device, and more particularly to a laser projecting device used for construction and surveying work in construction work and the like.

[0002]

2. Description of the Related Art FIG. 5 is a vertical cross-sectional view of a conventional laser projector.

The light projecting device main body 101 includes a cylindrical inner housing 103 for holding a collimator lens 105.
It is suspended by a wire 102 of a book. Inner housing 10
3 is housed in a cylindrical fixed housing 104 fixed to the main body 101 of the light projecting device, and the outer peripheral surface of the inner housing 103 is separated from the inner peripheral surface of the fixed housing 104 by a minute distance d.

A laser diode 111 for emitting a laser beam L is arranged at a substantially focal position of the collimator lens 105. A cylindrical rotating body 114 is arranged below the collimator lens 105, and the rotating body 114 is rotatably attached to the light projecting device main body 101 via a bearing 116. A penta mirror 115 that reflects the laser light L from the collimator lens 105 at a right angle is fixed in the rotating body 114. The rotating body 114 can be rotated by the motor 110 via the transmission belt 118.

[0005] The light projecting device main body 1 01 is leveling unit 1
It is attached to 30. Leveling unit 130 includes an upper plate 131 fixed to the light projecting device main body 1 01, the upper plate 13
1 and a lower plate 132 attached via three leveling screws 133. The lower plate 132 is connected to a tripod (not shown). A bubble tube 134 is fixed to the upper plate 131.

When the laser projecting device is operated, the laser diode 111 emits light, the laser light L from the laser diode 111 is incident on the collimating lens 105, and the laser light L collimated by the collimating lens 105 is a pentamirror. It is reflected at 115 in the horizontal direction. Since the rotating body 114 holding the pentamirror 115 is rotated by the motor 110, the laser light L reflected by the pentamirror 115 is emitted to the outside through the windows 114a and 101a, and is scanned in the horizontal direction in the direction of 360 °.

When carrying out a horizontal marking operation using this laser projecting device, first, the laser projecting device is installed at a predetermined position via a tripod. At this time, the worker
While looking at 4, the leveling screw 133 is turned to perform leveling work.
By this work, the inclination can be corrected to about ± 10 '.

After the manual leveling work by the operator, the above-mentioned automatic tilt correction function of the inner housing 103 operates,
Level accuracy within ± 10 ″ can be obtained.

[0009]

However, since the automatic tilt correction range of the conventional laser projector is as small as several tens of minutes,
The leveling work of turning the leveling screw 133 while looking at the position of the bubble in the bubble tube 134 requires skill, is actually complicated for the operator, and takes time to level up to several tens of minutes.
Specifically, it is difficult to actually know which leveling screw of the three leveling screws 133 should be moved and to what extent according to the position of the bubble in the bubble tube 134. Will also move. Therefore, when the laser light projecting device is frequently moved and used, the burden on the operator is further increased and the work efficiency is deteriorated.

The present invention has been made in view of the above circumstances, and its object is to perform laser leveling work which can reduce the burden on the operator and improve work efficiency by eliminating the leveling work by the leveling screw. An optical device is provided.

[0011]

In order to solve the above-mentioned problems, a laser projecting device according to a first aspect of the invention is a light emitting means for emitting a laser beam, and an optical for projecting a laser beam from the light emitting means. And a laser projecting device comprising:
A housing and an inside of the housing for holding the light emitting means.
An outer housing to hold, the housing and the outer housing
Between the outer housing and the direction of gravity of the outer housing.
Automatic leveling mechanism for compensating for tilt
And at least one optical system constituting the optical means
An inner housing that holds and is housed inside the outer housing.
Housing, the inner housing and the outer housing
Between the inner housing and the inner housing in the direction of gravity.
And an automatic precision leveling mechanism for correcting the tilt .

According to a second aspect of the present invention, in the automatic light leveling mechanism, the outer housing is suspended from the housing and is directed in the direction of gravity by the weight of the outer housing. It consists of rocking means.

Further, in the laser light projecting device according to a third aspect of the present invention, in the automatic precision leveling mechanism, the inner housing is hung on the outer housing, and is directed in the gravity direction by the weight of the inner housing. The oscillating means.

According to a fourth aspect of the present invention, there is provided the laser light projecting device, wherein the automatic leveling mechanism is provided in the outer housing with a spherical non-magnetic metal plate, and in the housing. A vibration damping means configured by a spherical magnet that acts on a magnetic metal plate to damp the shake of the outer housing, and each curvature center of the spherical nonmagnetic metal plate and the spherical magnet is , Coincides with the center of swing of the outer housing.

[0015]

When the case is tilted, the large tilt of the case is automatically corrected to a certain range by the outer housing, and the tilt correction provided in the outer housing is corrected within the range corrected by the outer housing. Since the means further automatically corrects the slight tilt, the tilt automatic correction range is greatly expanded.

Further, it is composed of a spherical non-magnetic metal plate provided in the outer housing, and a spherical magnet provided in the casing and acting on the non-magnetic metal plate to attenuate the vibration of the outer housing. Since the vibration damping means is adopted, it is possible to damp the vibration of the outer housing when the housing is tilted and stop the outer housing in a short time.

[0017]

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

FIG. 1 is a vertical sectional view of a laser projection device according to a first embodiment of the present invention.

An outer housing 1 is swingably suspended in an outer case (housing) 6. An arm 7 is integrally provided at an upper end portion of the outer housing 1, and a spherical portion 8 is integrally provided at a tip end portion of the arm 7. A spherical non-magnetic metal plate 9 (for example, a copper plate) is fixed to the lower end of the outer housing 1 with screws 37.

On the upper surface of the outer case 6, there is formed a spherical seat surface 6a for rotatably supporting the spherical body 8. A lid 12 is attached to the upper surface of the outer case 6 to cover the spherical portion 8 seated on the seat surface 6a. At the bottom of the outer case 6, there is a window 6 for sending laser light to the outside.
a is formed, and a protective glass 36 is attached to the window 6a. The lower surface portion of the outer case 6 is integrally provided with a female screw portion 13 for attaching the outer case 6 to a tripod (not shown) and three contact portions 30 that come into contact with the reference surface of the tripod.

A battery box 33 for accommodating a laser diode (light emitting means) 11 fixed to the outer housing 1 and a battery 32 for supplying electric power to the circuit board 40 is provided in an upper portion of the outer case 6. . In the lower part of the outer case 6, spherical magnets 34, 35 that form a part of a magnetic vibration damping mechanism (vibration damping means) described later are arranged. The magnet 34 is located above the non-magnetic metal plate 9,
The magnets 35 having different polarities are located below the non-magnetic metal plate 9. The polar centers of the spherical non-magnetic metal plate 9 and the spherical magnets 34, 35 coincide with the swing center (the center of rotation of the spherical body portion 8) O of the outer housing 1. The non-magnetic metal plate 9 and the magnets 34, 35 constitute a magnetic vibration damping mechanism.

Inside the outer housing 1, a cylindrical inner housing (inclination correcting means) 3 for holding a collimator lens 5 is suspended by three wires 2. The inner housing 3 is housed in a cylindrical fixed housing 4 fixed to the outer housing 1, and the outer peripheral surface of the inner housing 3 is separated from the inner peripheral surface of the fixed housing 4 by a minute distance d. The fixed housing 4 and the inner housing 3 housed in the fixed housing 4 constitute an air damper type vibration damping mechanism.

At almost the focal position of the collimator lens 5,
A laser diode 11 that emits laser light L is arranged. A cylindrical rotating body 14 is arranged below the collimator lens 5, and the rotating body 14 is rotatably attached to the outer housing 1 via a bearing 16. The laser light L from the collimator lens 5 is provided in the rotating body 14.
The pentamirror 15 that reflects the light at a right angle is fixed.
The rotating body 14 is connected to the motor 10 via a transmission belt (not shown).
It can be rotated. The rotating body 14, the bearing 16, the pentamirror 15, the transmission belt and the motor 10 constitute a laser light scanning mechanism.

In order to carry out a horizontal marking operation using the laser projecting apparatus of this embodiment, first, the laser projecting apparatus is installed at a predetermined position via a tripod, and the bubble tube 18 is roughly viewed. (Within ± 10 °) Set. At this time, as shown in FIG. 2, when the mounting surface 19 of the laser projecting device is inclined by θ = 10 ° with respect to the horizontal plane H, the outer housing 1 is swingably suspended in the outer case 6. Therefore, the outer housing 1 moves in the direction of gravity with the center of rotation of the spherical portion 8 as the center of swing O, causing pendulum vibration. In this way, the inclination of 10 ° can be automatically corrected to the correction accuracy of 8 '. When the outer housing 1 oscillates as a pendulum, the spherical non-magnetic metal plate 9 also vibrates integrally with the outer housing 1, but the non-magnetic metal plate 9 causes the magnets 34, 3 to move.
When a magnetic field formed between the five is crossed, an eddy current is generated, a damping force acts on the non-magnetic metal plate 9, and vibration of the outer housing 1 is suppressed.

The correction range of the outer housing 1 is 1
Since it is 0 ', the inner housing 3 moves, and there is a slight distance d between the outer peripheral surface of the inner housing 3 and the inner peripheral surface of the fixed housing 4. Therefore, when the outer housing 1 tilts, the inner housing 3 moves. Causes vibration, and the distance d changes. At that time, flow resistance of air is generated, the vibration of the inner housing 3 is damped by this flow resistance, and the inner housing 3 stands still at the moving position. Further, since the inner housing 3 is suspended by the three wires 2, the outer housing 1 is slanted by the action of gravity, so that the inner housing 3 moves relatively in parallel. Since the inner housing 3 holds the collimating lens 5, the laser light L is always corrected in the vertical direction even if the outer housing 1 is tilted due to the optical axis of the laser diode 11 being displaced in the horizontal direction. In this way, a finer inclination is automatically corrected within the range of 8 ', and a correction accuracy within ± 10 "is obtained.

The laser light L from the laser diode 11 is incident on the collimator lens 5, and the laser light L collimated by the collimator lens 5 is reflected in the horizontal direction by the pentamirror 15. Rotating body 1 holding the pentamirror 15
Since 4 is rotated by a motor 11 0, the laser light L reflected by the pentagonal mirror 15 window 14a of the rotator 14,
The light is emitted to the outside through the window 1a of the outer housing 1 and the window 6a of the outer case 6, and is scanned in the 360 ° direction in the horizontal plane. Since the laser light scanning mechanism including the rotating body 14, the bearing 16, the pentamirror 15, the transmission belt and the motor 10 is heavy, the seat surface 6a and the spherical portion 8 are robust.
Since the inner housing 3 that is hung on the wire and has a large tilt corrected and holds the collimator lens 5 has a light weight, it is hung on the wire 2 to correct a slight tilt.

According to the laser projector of this embodiment, the mounting surface 19 of the laser projector is θ = 10 with respect to the horizontal plane H.
In the case of inclination, the outer housing 1 automatically corrects the inclination to a correction accuracy of 8 ', and within the range 8'corrected by the outer housing 1, the inner housing 3 is also automatically tilt corrected. since 10 "within level of accuracy is obtained, conventional troublesome leveling work is unnecessary to turn the leveling screws 133 while viewing the bubble tube 1 34 as, the operator who performs the horizontal marking work The burden is reduced and work efficiency is improved.

FIG. 3 is a vertical sectional view of a laser projection device according to a second embodiment of the present invention. The same parts as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted. Although the first embodiment has described the case where the air damper is used as the vibration damping mechanism of the inner housing 3, instead of this, as shown in FIG. 3, an annular non-magnetic metal plate 49 is fixed to the lower portion of the inner housing 3. The magnet 74 above the non-magnetic metal plate 49.
Are arranged below the non-magnetic metal plate 49 and a magnet 75 having a polarity different from that of the magnet 74 to form a magnetic vibration damping mechanism.
I used it.

Also, in the first embodiment, the outer housing 1
The case where the arm 7 is integrally provided at the upper end of the arm 7, the spherical portion 8 is integrally provided at the tip of the arm 7, and the battery box 33 is provided at the upper part of the outer case 6 has been described. , A hollow arm 3 at the upper end of the outer housing 31
7, the hemisphere 38 was screwed to the tip of the arm 37, and the battery box 63 was integrally provided on the hemisphere 38. Further, the upper surface of the outer case 36 has a spherical seat surface 36.
a is formed. The spherical surface 38 a of the hemisphere 38 is a ball 9 rotatably supported on the seat surface 36 a of the outer case 36.
It is swingably supported through 0.

As shown in FIG. 4, when the mounting surface 19 of the laser projection device is inclined by θ = 10 ° with respect to the horizontal plane H,
The outer housing 31 moves in the direction of gravity with the center of rotation of the hemisphere portion 38 as the center of swing O, and performs pendulum vibration. In this way, the inclination of 10 ° can be automatically corrected to the correction accuracy of 8 '. When the outer housing 31 performs pendulum vibration, the vibration of the outer housing 31 is damped by the magnetic vibration damping mechanism. Further, the inner housing 3 automatically performs a finer tilt correction within the range of 8 ', a correction accuracy within ± 10 "is obtained, and the non-magnetic metal plate 49 fixed to the lower portion of the inner housing 3 is used. And magnet 7
The vibration of the inner housing 3 is damped by the magnetic vibration damping mechanism composed of 4, 75.

According to the laser projecting apparatus of the second embodiment, the inner housing 3 is provided with the same vibration damping function as the air damper type vibration damping mechanism of the first embodiment by the magnetic vibration damping mechanism. Since the outer housing 31 swings like the outer housing 1 of the first embodiment, the same effect as that of the first embodiment can be obtained.

A gimbal structure may be used as the swinging means of the outer housings 1, 31.

Further, the slight tilt correction in the above-described embodiment was carried out by fixing the laser diode 11 to the outer housing 1 and holding the collimator lens 5 in the inner housing 3, but the collimator lens 5 in the outer housing 1 was corrected. It is also possible to fix the above and hold the laser diode 11 in the inner housing 3.

In each of the above-mentioned embodiments, the laser projecting device having the laser light scanning mechanism for scanning the laser light in the horizontal direction in the outer housings 1 and 31 has been described. It can also be applied to a laser projecting device that simply emits laser light in one direction without scanning.
It is possible to obtain the same effects as those of the above-mentioned respective embodiments.

Further, although the laser diode is used as the light source in each of the above-mentioned embodiments, a light source such as an LED or a light bulb can also be used.

[0036]

As described above, according to the laser light projecting device of the present invention, a large inclination of the housing with respect to the horizontal plane is automatically corrected by the outer housing, and within the range corrected by the outer housing, it is even smaller. Since such a tilt is corrected, the complicated leveling work of turning the leveling screw while looking at the bubble tube is unnecessary, the burden on the operator is reduced, and the work efficiency is improved.

Further, it is composed of a spherical non-magnetic metal plate provided in the outer housing and a spherical magnet provided in the casing and acting on the non-magnetic metal plate to attenuate the shake of the outer housing. Since the vibration damping means is adopted, it is possible to damp the vibration of the outer housing when the housing is tilted and stop the outer housing in a short time, and the workability is further improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a laser projection device according to a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a state where the laser projecting device of FIG. 1 is tilted.

FIG. 3 is a vertical sectional view of a laser projection device according to a second embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view showing a state in which the laser projection device of FIG. 3 is tilted.

FIG. 5 is a vertical cross-sectional view of a conventional laser light projecting device.

[Explanation of symbols]

1,31 outer housing 2 wires 3 Inner housing 6 outer case 7 arms 8 sphere 9 Non-magnetic metal plate 11 Laser diode 34,35 magnets

Claims (4)

(57) [Claims] 1. A laser projecting device comprising a light emitting means for emitting a laser beam and an optical means for projecting a laser beam from the light emitting means , wherein the casing is arranged inside the casing. , Outside holding the light emitting means
A side housing , provided between the housing and the outer housing,
To correct the inclination of the outer housing with respect to the direction of gravity
Holds the automatic leveling mechanism of and at least one optical system constituting the optical means.
The inner housing housed inside the outer housing
And between the inner housing and the outer housing
To compensate for the inclination of the inner housing with respect to the direction of gravity.
An automatic precision leveling mechanism for correcting the laser beam. Wherein said automatic rough leveling mechanism, wherein the outer housing is suspended in the housing, characterized in that it is constituted by a first rocking means is directed to the direction of gravity by the weight of said outer housing The laser projection device according to claim 1. Wherein the automatic fine leveling mechanism, wherein the inner housing is suspended in the outer housing, characterized in that it is constituted by a second rocking means directed in the direction of gravity by the weight of the inner housing Claim 1
The laser projection device described. 4. The automatic ruffling mechanism is provided in the outer housing and has a spherical non-magnetic metal plate, and is provided in the housing, and acts on the non-magnetic metal plate to shake the outer housing. And a vibration damping means composed of a spherical magnet for damping, wherein each curvature center of the spherical non-magnetic metal plate and the spherical magnet coincides with the swing center of the outer housing. The laser projecting device according to claim 1, wherein the laser projecting device is a laser projecting device.