JP2511435Y2 - Laser Marker - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser marker which is used for positioning in construction and construction work and emits a laser beam to perform vertical marking and horizontal marking.

[0002]

2. Description of the Related Art A conventional laser marker uses a helium-neon laser as a laser light source. The helium neon laser is fixed vertically in a gyro portion supported by a gimbal mechanism so as to be swingable in a plurality of directions, in accordance with the laser irradiation direction. During use, the gyro portion swings, and the action of gravity stabilizes the irradiation direction of the laser light in the vertical direction, so that the laser light is emitted in two directions, vertically upward and vertically downward.

[0003]

Since the helium-neon laser can emit laser light in two directions which are substantially opposite to each other, it can be used for a laser marker which needs to emit marker light both vertically above and vertically below. Suitable,
On the other hand, both the size and the weight are generally large, which has been a factor that hinders the downsizing of such a marker device. On the other hand, semiconductor lasers have the advantage of being small and lightweight, but since the laser can be emitted in only one direction,
When it is used for the laser marker as described above, there is a problem that a complicated optical system for turning the marker light on the opposite side of the laser emission direction is required, or two semiconductor lasers are required otherwise. . The present invention has been made in view of such a problem, and an object thereof is to provide a small and lightweight laser marker using a semiconductor laser as a laser light source.

[0004]

In order to achieve the above object, a laser marker according to the present invention comprises a gimbal that is swingably supported around a gimbal shaft, and a gimbal on the gimbal that is substantially perpendicular to the gimbal shaft. A gyro that is swingably supported around a gyro axis and that is stabilized at a certain position in the vertical direction by its own weight, a semiconductor laser fixedly mounted on the gyro, and a gyro disposed on the gyro. The laser light emitted from the semiconductor laser is divided into two directions, that is, vertically upward and vertically downward when the laser beam is stable, and the laser light is emitted. The light guide means reflects the laser light emitted from the semiconductor laser by a first half mirror that reflects in a direction corresponding to vertically upward or downward in the stable state, and the first half mirror. A second half mirror that is placed on the optical path of the laser light, transmits a part of the reflected laser light in the same direction, and reflects a part of the reflected laser light in the same direction as the incident direction and in the opposite direction. be able to.
According to another aspect of the present invention, in addition to the vertical information and the vertical downward direction, the laser beam is also emitted in the horizontal direction.

[0005]

As described above, the laser marker according to the present invention uses a semiconductor laser that emits laser light only in one direction as a laser light source, and divides the laser light into multiple directions by an optical system to mark in multiple directions. Do. Since this optical system can be easily constructed as will be understood from the examples below, a compact and lightweight laser marker can be obtained in combination with the compactness of the semiconductor laser. Further, since both the semiconductor laser and the optical system are fixed on the gyro, it is not necessary to adjust the laser optical axis during use.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is an elevation view of a gimbal and a gyro of a laser marker according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of a main part of the gyro, and FIG. 3 is a sectional view taken along line AA of FIG. 1 to 3, gimbal 1 is supported by a ^'gimbal shaft 2, ^2' via bearings 3,3. As a result, the gimbal moves along the gimbal axis X in FIG.
It is possible to swing around. The other end of the gimbal support shaft 2, 2 ^'is fixed to the apparatus main body housing (not shown). The gimbal has a through hole provided so as to face the gyro axis Y which is perpendicular to the gimbal axis X connecting the centers of the bearings 3 and 3 ^′ ,
The vent holes also provide a separate bearing 4, 4 ^'. The bearings 4 and 4'support the gyro 5 at its transition portion 7 so as to be swingable around the gyro axis Y in FIG.

As best shown in FIGS. 2 and 3, the gyro 5 includes a gyro body portion 6, gyro side portions 8 attached to both sides of the body portion 6 through transition portions 7, and downward. It consists of a gyro extension 9 that extends and has a substantially T-shape. The gyro side portion 8 extends to the outside of the gimbal continuously with the transition portion supported by the bearing. As described above, since the gyro is supported by the gimbal that can swing about the axis X so as to swing about the axis Y, the gyro can swing in two directions. Therefore, when the device is used, the lower gyro extension 9 mainly functions as a weight, and is stabilized by the action of gravity in a direction in which the gyro longitudinal direction Z coincides with the vertical direction. It should be noted that here, for convenience of description, the shape is referred to as the longitudinal direction in accordance with the shape of the apparatus, but this does not limit the shape of the gyro according to the present invention.

As shown in FIGS. 2 and 3, the inside of the gyro 5 has a hollow inner hole, and the semiconductor laser 10 and the collimator lens 20 are provided in the inner hole of the one gyro side portion 8. Place and fix. Laser light emitted from the semiconductor laser is transferred to a transition portion 7 supported by a bearing.
Through the, i.e. through the bearing portions 4, 4 ^'provided on the gimbal, is led to the gyro body portion. A cylindrical lens 23, which will be described later, is installed in the inner hole of the gyro side installation portion. An optical system including half mirrors 21 and 22, an optical axis adjusting glass 24, and the like, which will be described in detail later, is installed in the gyro body 6 and the extension 9. 25, 2
6 is a cover glass.

Next, the operation of the optical system of this embodiment will be described. FIG. 4 is an explanatory diagram schematically showing the optical system of the present embodiment.
Referring to, the laser light emitted from the semiconductor laser 10 passes through the collimator lens 20, becomes parallel light in a direction perpendicular to the gyro longitudinal direction Z, and enters the first half mirror 21. In the first half mirror 21, a part of the incident light is reflected, turned at a right angle, guided downward in parallel with the longitudinal axis of the gyro, and part of it is transmitted in the horizontal direction as it is.

The optical laser light reflected downward is directed to the second half mirror 22 placed in the inner hole of the gyro extension,
It is vertically incident on the reflecting surface. In the second half mirror, a part of the incident light is transmitted as it is and a part is reflected in the opposite direction to the incident direction. The light passing through the second half mirror 22 further passes through the cover glass and the diaphragm 29
It is squeezed into a pin spot by and is ejected outside the device. At this time, as described above, the gyro longitudinal direction coincides with the vertical direction due to the action of gravity, and the emitted light is parallel to the gyro longitudinal direction, so that the direction of the emitted light coincides with the vertical direction. Therefore, it is possible to mark vertically below. An optical axis adjusting glass 24 as shown in FIG. 2 may be arranged between the half mirror 22 and the cover glass 27. The light reflected by the second half mirror 22 is incident on the first half mirror again from below, and a part of the light is transmitted as it is.
And is emitted to the outside of the apparatus through a diaphragm 28 similar to the diaphragm 29. The direction of the light emitted upward also matches the vertical direction for the same reason as above. Therefore, it is possible to mark vertically above.

First emitted from the above-mentioned semiconductor laser
Of the laser light that is horizontally incident on the half mirror 21, the laser light that is transmitted through the first half mirror is incident on the cylindrical lens 23. Since it is practically more convenient to be able to mark a wide area in the horizontal direction, the cylindrical lens 23
The light incident on the gyro in the plane perpendicular to the longitudinal direction,
Spread over an irradiation angle of about 60 degrees. FIG. 5 is an explanatory view showing the optical system of FIG. 4 as seen from above, and shows how laser light is spread by 60 degrees by a cylindrical lens. The angle is not limited to 60 degrees described here, and it is also possible to form a spot like the vertical direction. The laser light spread at 60 degrees is emitted to the outside of the device through the cover glass 25. This light is emitted in a plane perpendicular to the longitudinal direction of the gyro, and the longitudinal direction of the gyro coincides with the vertical direction, so that marking in the horizontal direction, that is, the direction perpendicular to the vertical direction can be performed.

FIG. 6 shows the details of the laser marker of this embodiment. In FIG. 6, components equivalent to those in FIGS. 1 to 5 are represented by the same reference numerals. Explaining the elements not described above, reference numerals 41 to 45 are elements for mounting the semiconductor laser 10 and the collimator lens 20, 41 is a semiconductor laser holder, 42 is a semiconductor laser frame, and 43 is a collimator lens. Frame, 44, 45
Is a set screw. Reference numerals 51 to 54 are elements for mounting the cylindrical lens 23, 51 is a lens frame,
52 is a retaining ring, and 53 and 54 are set screws. Reference numerals 61 to 69 are elements for mounting the first and second half mirrors and the optical axis adjusting glass, 61 is a first receiving base, 62 is a mirror mounting base, 63 is a mirror spring, and 64 is a set screw. , 65 is a second pedestal, 66 is a mirror pedestal, and 67, 68 and 69 are set screws. Also, 70 is a window plate and pinhole. Reference numeral 80 is a weight for stabilizing the gyro vertically.

Although an example of the apparatus for carrying out the present invention has been described above, the present invention is not limited to the details thereof.
For example, in this embodiment, the marker light is emitted in the horizontal direction in addition to the vertically upward and vertically downward directions, but it may be emitted only in the vertically upward and downward directions. In addition, the first half mirror is configured to reflect downward,
This may be reflected upward, and the second half mirror may be provided in the upper portion in accordance with the reflection. Further, the emission direction of the laser light from the semiconductor laser is the direction perpendicular to the longitudinal direction of the gyro, but it may be a different direction. In that case, the direction of the first half mirror 21 may be changed so that the direction of the reflected light by the mirror is parallel to the longitudinal direction of the gyro. Furthermore, in the present embodiment, the gyro has a hollow structure and the semiconductor laser and the optical system are arranged inside the hollow structure. However, the gyro may have a solid structure and the semiconductor laser and the optical system may be arranged on the surface thereof. Besides, various modifications are possible within the scope of the present invention.

[0014]

As described above, the laser marker of the present invention uses a semiconductor laser that emits laser light in only one direction as a laser source, and divides the laser light in multiple directions by an optical system. Marking. The semiconductor laser is much smaller in size and weight than the helium neon laser that has been conventionally used for this type of laser marker, and the optical system can be easily configured as shown in the embodiment, so that the conventional device can be used. Compared to this, it is possible to achieve a significant reduction in size and weight. Moreover, since both the semiconductor laser and the optical system are fixed on the gyro, there is no need to adjust the laser optical axis at the time of use, which is convenient. Even when the laser light is emitted in three directions, vertically upward, vertically downward, and horizontal, both the semiconductor laser and the optical system for splitting the laser light are fixed on the gyro, so adjustment during use is required. It is possible to easily perform multi-directional orientation without the need.

[Brief description of drawings]

FIG. 1 is an elevational view showing an outline of a gimbal and a gyro of a laser marker according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a main part of a gyro.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a diagram schematically showing the operation of the optical system of the laser marker according to the embodiment shown in FIGS. 1 to 3;

FIG. 5 is a view similar to FIG. 4, showing a view from above.

FIG. 6 is a detailed view of the gimbal and gyro of the laser marker shown in FIG.

[Explanation of symbols]

 1 gimbal 2 gimbal spindle 5 gyro 10 semiconductor laser 20 collimator lens 21 first half mirror 22 second half mirror

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Takanori Shibata 1-3-6 Yoyogi, Shibuya-ku, Tokyo Nitto Kogyo Co., Ltd. (56) Reference JP-A-2-62906 (JP, A) JP-A 63-191912 (JP, A) JP-A-4-244912 (JP, A) Actually opened 64-34507 (JP, U) Actually opened 1-158908 (JP, U)

Claims (2)

(57) [Scope of utility model registration request] 1. A gimbal swingably supported around a gimbal shaft, and a swingable support on the gimbal around a gyro shaft that is substantially perpendicular to the gimbal shaft, and is vertically oriented by its own weight. A gyro that is designed to be stable at a fixed position, a semiconductor laser that is fixedly mounted on the gyro, and a laser beam that is disposed on the gyro and that is emitted from the semiconductor laser is vertically above the stable state. Light guide means for splitting and emitting in two directions that match vertically downward, wherein laser light emitted from the semiconductor laser is reflected in a direction that is vertically upward or downward when stable. The first half mirror and the first half mirror are placed on the optical path of the laser light reflected by the first half mirror, and a part of the reflected laser light is transmitted in the same direction as that of the first half mirror. A laser guide having a second half mirror that reflects in the same direction as the incident direction but in the opposite direction, and a laser marker. 2. A gimbal swingably supported around a gimbal shaft, and a swingable support on the gimbal about a gyro shaft that is substantially perpendicular to the gimbal shaft, and is vertically oriented by its own weight. A gyro that is designed to be stable at a fixed position, a semiconductor laser that is fixedly mounted on the gyro and that emits laser light in a direction that coincides with the horizontal direction when the gyro is stable, and the semiconductor laser that is disposed on the gyro. The laser light emitted from the semiconductor laser is divided into three directions of vertically upward, vertically downward, and horizontal when the laser light is stable and is emitted. A first half mirror that transmits a part of the light in the same direction and reflects a part of the light in a direction that is vertically upward or downward when stable. Is placed on the optical path of the laser light reflected by the first half mirror, a part of the reflected laser light is transmitted in the same direction, and a part is reflected in the same direction as the incident direction and the opposite direction. And a second light guide means having a second half mirror, and a laser marker.