JP4803926B2 - Laser surveying instrument target - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a level planer that scans a laser beam in a horizontal plane to indicate a reference plane such as a horizontal plane, pipes that are irradiated with a laser beam, etc. The present invention relates to a target for a laser surveying instrument that is used together with a pipe laser or the like for setting a gradient when installing the sensor.
[0002]
[Prior art]
As shown in FIG. 7, the level planar 1 emits a red laser beam 2 with visible light from the rotating unit 3 and scans the laser beam 2 at a scanning speed v and a scanning width θ in a horizontal plane, or The target 6 placed on the wall surface 4 or the like is irradiated by being stationary. An example of a front view of the target 6 used at this time is shown in FIG. 8, and an example of a rear view of the target 6 is shown in FIG.
The target 6 includes a reflective portion 14 in which a silver reflective sheet 12 that reflects light on a half-side of the back surface is attached to a red transparent acrylic plate 10 that has been finely textured, and a reflective sheet 12 on the back surface of the acrylic plate 10. Are formed on the surface of the acrylic plate 10, and a target 8 consisting of a double circle and a crosshair, a reference line 20 and a scale 22 are silk-printed on the surface of the acrylic plate 10 with a white paint. . In addition, the target 6 is also provided with a hole 23 that is used when suspended through a hook-like hook or thread, and a notch 24 for applying a pencil or the like when marking the wall surface 4 or the like. .
[0003]
When performing marking operation using such a target 6, first, the target 6 is moved up and down with the laser beam 2 scanned in front of the target 6, and the reference line 20 is aligned with the center of the laser spot 26. As a result, the target 6 is aligned. Then, the wall surface 4 was marked by applying a pencil or the like to the notch 24 or the scale 22. Alternatively, the target 6 is aligned by irradiating the target 8 of the target 6 with the laser beam 2 stationary and aligning the center of the target 8 with the center of the laser spot 26.
[0004]
The reason why the reflection sheet 12 is attached to only one side of the back surface of the acrylic plate 10 with this target 6 is that, when the laser beam 2 hits the target 6, scattering occurs due to the embossing. This is because the laser spot 26 reflected on the plate 10 can be seen, so that the inking operation and the gradient setting can be performed while looking at the back side of the target 6.
Furthermore, in this target 6, the lower part of the acrylic board 10 is notched and the jaw part 25 is formed, The magnet 27 is attached to this jaw part 25 detachably with the bis | screw 29 etc., and the target 6 is used appropriately It can be used even if it is fixed to a fixed fixture.
[0005]
[Problems to be solved by the invention]
By the way, the conventional type is the type that emits a laser beam having a parallel beam, but recently, as disclosed in JP-A-8-14891, an autofocus mechanism is provided, There is also a level planar that makes it easy to make the center of the laser spot 26 coincide with the center of the target 8 and the reference line 20 with high accuracy by condensing the laser beam 2 on the target 6 and making the laser spot 26 small. It came out. However, in such a level planar, the laser beam 2 is collimated in consideration of safety when the laser beam 2 hits the operator's eyes when the laser beam 2 is in a stationary state. There is also a problem that a safety device such as a light beam or diverging light is required, and the cost is increased due to a complicated configuration.
[0006]
Therefore, in order to solve the above problems, only the target is improved at low cost without modifying the conventional laser planar that emits a laser beam with a parallel beam, which is still used in large numbers, and the ink marking operation is performed. Provided is a target for a laser survey instrument capable of easily aligning the center of a laser spot with a target center on a target or a reference line with high accuracy when setting a time or a gradient.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention according to claim 1 is a laser surveying instrument target including a target plate that has a reflection part that reflects light and has a reference line drawn in a bright color on the reflection part. The reflective portion is provided with at least a pair of parallel non-reflective portions having an interval narrower than the diameter of the laser spot symmetrically with respect to the reference line.
[0008]
The invention according to claim 2 is the invention according to claim 2, wherein the reflective portion is a transparent sheet having a reflective sheet attached to the back surface of the target plate or a reflective paint applied thereto. The reflection part is a slit provided in the reflection sheet or the reflection paint application part.
[0009]
A surveying instrument target according to a third aspect of the present invention is the laser surveying instrument target according to the first or second aspect, wherein the target plate is a light having a dark color on the surface of the region other than the reflecting portion. It is characterized by sticking a color sheet or printing a light color portion in which a target is drawn in a dark color.
[0010]
The invention according to claim 4 is characterized in that, in the invention according to claim 3, the target is composed of a mesh and a cross hair, and a small hole penetrating the intersection of the cross wire is provided.
[0011]
The invention according to claim 5 is characterized in that, in the invention according to claim 3 or 4, the target is made square or horizontally long.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the target for a laser surveying instrument of the present invention will be described in detail with reference to the drawings.
[0014]
First, a front view of a target for a laser surveying instrument according to the first embodiment is shown in FIG. 1, and a rear view of the target is shown in FIG. The target 6A is a red transparent acrylic plate 10 that has been subjected to fine graining as in the conventional example shown in FIGS. 8 and 9 (a target plate made of a red transparent material such as a nylon sheet or an acrylic sheet may be used). The reflective part 14 which stuck the silver reflective sheet 12 or apply | coated the silver reflective coating to the half piece side of the back surface of this, and the translucent part 16 which has not adhered the reflective sheet 12 to the back surface of the acrylic board 10 are comprised. The reference line 20 and the scale 22 are silk-printed on the surface of the acrylic plate 10 with a white paint (may be a light paint close to white such as yellow).
[0015]
In the present embodiment, the target 6A is configured to be transparent in red so that the laser beam 2 of the laser surveying instrument is red so that the laser beam 2 can be most visually recognized. The laser beam 2 is not limited to being transparent, and when the color of the laser beam 2 is another color (for example, green), the laser beam 2 may be configured with another color that is most easily visible. Further, a material such as a colored transparent acrylic plate, a nylon sheet, an acrylic sheet, or the like may be subjected to texture processing so that the laser beam 2 can be easily visually recognized by irregular reflection.
[0016]
In addition, a notch 24 is provided at the position of the reference line 20 on the acrylic plate 10 for applying a pencil or the like when marking the wall surface 4 or the like. The magnet is detachably fixed like the conventional one.
[0017]
On the back surface of the reflecting portion 14 of the target 6A, a pair of a pair with a distance of about 30-80% of the diameter of the laser spot 26 and a space somewhat narrower than the diameter of the laser spot 26 is symmetrical with respect to the reference line 20 printed on the front surface. A non-reflective portion is provided. This non-reflective portion is configured by providing a slit 28 in the reflective sheet 12. Of course, you may comprise by drawing a straight line in the acrylic board 10 with black paint (it may be dark paint near black).
[0018]
When the white reference line 20 on the reflection portion 14 of the target 6A is irradiated with the laser beam 2 in a stationary state, the portion where the reflection sheet 12 is adhered reflects the laser beam 2 as shown in FIG. Although the laser spot 26 appears bright, the laser beam 2 is hardly reflected at the slit 28 and passes through the target plate 6A, so the portion of the slit 28 appears dark. On the other hand, when the reference line 20 of the target 6A is scanned with the laser beam 2, the scanning line 27 appears bright as shown in FIG. 10, but the slit 28 portion appears dark.
[0019]
As a result of the bright and dark contrast, the slit 28 which is a non-reflective portion serves as an auxiliary line when the center of the laser spot 26 or the scanning line 27 is aligned with the reference line 20, so that the red laser spot 26 Alternatively, the center of the laser spot 26 or the scanning line 27 and the reference line 20 can be easily aligned by adjusting the position of the target 6A while observing the dark line at the scanning line 27 and the slit 28.
[0020]
In the present embodiment, the semi-transmissive portion 16 has a white sheet 37 (light color sheet close to white) printed with black (a dark color close to black) a target 36 made of fine lines and thick cross lines. It may be). Of course, a white portion on which the target 36 is drawn may be printed on the semi-transmissive portion 16. At the center of the target 36, a small hole 38 into which a tip such as a pencil can be inserted is formed.
[0021]
In this target 6A, when the white sheet 37 is irradiated with the laser beam 2, the white sheet 37 is not subjected to a special surface treatment such as specular reflection in order to suppress interference due to the meshes. As a result, the laser spot 26 is not enlarged and is easy to see from any direction. Therefore, in such a white sheet 37, the grid looks black on the red laser spot 26, and therefore the center of the laser spot 26 and the center of the target 36 can be easily aligned using the fine grid and the thick crosshair. .
[0022]
Further, in the present embodiment, the reflective portion 14 of the target 6A is silk-printed with a white (light color) paint on the surface of the acrylic plate 10 and a cross slit 30 obtained by cutting the acrylic plate 10 and the reflective sheet 12 in an overlapping manner. A target 34 comprising an ellipse 35 is provided. The penetrating cross slit 30 has such a width that a tip such as a pencil can be inserted.
[0023]
When the target 34 on the reflecting portion 14 of the target 6A is irradiated with the laser beam 2, a dark non-reflecting portion (cross slit 30) is seen on the red laser spot 26, so the center of the laser spot 26, the circle 35 and the cross slit 30 are visible. It becomes easy to match the center 33 of the. Furthermore, in a state where both centers coincide with each other, a tip such as a pencil can be inserted into the cross slit 30 to mark the wall surface 4 or the like.
[0024]
Further, a semicircular target 40 having a center line coinciding with one side of the acrylic plate 10 is also silk-printed with white (light color) paint on the surface of the acrylic plate 10 of the semi-transmissive portion 16. At the center of the target 40, a notch 24 for applying a pencil or the like when marking a wall surface or the like is also provided.
[0025]
Since this target 6A is provided with a semicircular target 40 whose center line is coincident with one side of the target 6A, when it is intended to mark on the intersecting line of the two walls, one side of the target 6A is set as one side. By bringing it into contact with the wall, it is possible to easily perform the ink marking work.
[0026]
As described above, the target 6A according to the present embodiment includes the various targets 34, 36, and 40 and the reference line 20. Therefore, the target 6A is positioned using the optimal target or the reference line according to the situation. Can be done efficiently.
Of course, the target 6A does not need to be provided with a plurality of targets 34, 36, the reference line 20 and the like as in the embodiment described above, and a non-reflective portion that displays the center of one target 34 and the target 34. (Cross slit 30), only one of the reference line 20, the non-reflective portions (slits 28) on both sides, and the white sheet 37 on which the target 36 is printed may be provided.
[0027]
By the way, the shape of the non-reflective portions (slits 28, 30) or the targets 34, 36 provided on the reflective portion 14 of the target 6A of the present invention is not limited to the above-described embodiment, and various shapes are possible. Such another embodiment is shown in FIGS.
[0028]
The pair of non-reflective portions (slits 28) disposed symmetrically with respect to the reference line 20 may be at least a pair, but two or more pairs may be formed as shown in FIG. It is desirable to change the slit width according to the distance from the reference line 20 as shown in 3 (b) so that the individual slits 28 can be identified. Further, the non-reflecting part (slit 28) may be formed in a triangular shape as shown in FIG. In any case, the reference line 20 can be easily aligned with the centers of the laser spot 26 and the scanning line 27 having various diameters. Furthermore, the reference line 20a may also be a non-reflective portion provided with a slit in the reflective sheet 12, as shown in FIG. 3D. In this case, the reference line 20a is identified so as to be identified as the reference line 20a. The slit width is changed between the line 20 a and the pair of slits 28.
[0029]
The target 36 printed in black on the white sheet 37 may combine a circle and an ellipse as shown in FIG. 4 (a) as a figure combined with the cross line, or a plurality of concentric shapes as shown in FIG. 4 (b). 4 may be a plurality of concentric circles as shown in FIG. 4C, may be a plurality of concentric squares as shown in FIG. 4D, or may be another appropriate point-symmetrical figure. .
[0030]
The half target 40 may be only one half of the point target figure as shown in FIGS.
[0031]
A target 34 having a cross-shaped non-reflective portion (slit 30) on the reflective portion 14 having the reflective sheet 12 attached to the back surface is provided with a cross-shaped non-reflective portion 45 as shown in FIG. It may be rotated to form an X shape, or a concentric circle may be silk-printed as shown in FIG. 6B, and a hole 31 into which a tip such as a pencil or the like can be inserted is formed at the center as a non-reflective portion. .
[0032]
【The invention's effect】
As is clear from the above description, in the invention according to claim 1 or 2, when the reference line of the reflection portion of the target is irradiated with the laser beam, the darkness formed symmetrically with the reference line on the laser spot together with the reference line. Since the non-reflective portion can be seen, it becomes easy to align the center of the laser spot and the reference line. For this reason, it is extremely economical because the marking operation can be facilitated by improving only the target without modifying the laser planar that emits a laser beam having a parallel beam bundle that has been used conventionally. is there.
[0033]
According to the invention according to claim 3, 4 or 5, the white sheet or the white portion irregularly reflects the laser beam so that the laser spot can be easily seen from any direction, and the black spot is seen on the laser spot. It becomes easy to align the center of the laser spot with the center of the target. For this reason, it is possible to facilitate the marking operation by improving only the target without modifying the laser planar that emits a laser beam having a parallel beam bundle, which is conventionally used, and is extremely economical. .
[0034]
In addition, according to the invention according to claim 3, 4 or 5, since the reference line and the target of the invention according to claim 1 or 2 are provided, the optimal reference line or target is used according to the situation. Since positioning can be performed, work efficiency can be further improved.
[Brief description of the drawings]
FIG. 1 is a front view of a target for a laser surveying instrument according to a first embodiment of the present invention.
FIG. 2 is a rear view of the target for a laser surveying instrument according to the embodiment.
FIG. 3 is a diagram showing a part of a target for a laser surveying instrument which is another embodiment of the present invention.
FIG. 4 is a diagram showing a part of a target for a laser surveying instrument which is another embodiment of the present invention.
FIG. 5 is a diagram showing a part of a target for a laser surveying instrument which is another embodiment of the present invention.
FIG. 6 is a view showing a part of a target for a laser surveying instrument which is another embodiment of the present invention.
FIG. 7 is a view showing a conventional laser surveying instrument (level planar).
FIG. 8 is a front view of a conventional target for a laser surveying instrument.
FIG. 9 is a rear view of a conventional target for a laser surveying instrument.
FIG. 10 is a diagram for explaining how the laser survey instrument target shown in FIG. 1 looks when scanned with a laser beam;
[Explanation of symbols]
1 Laser planar (laser surveying instrument)
2 Laser beam 6A Target 10 Acrylic plate (target plate)
12 reflective sheet 14 reflective part 16 transflective part 20 reference line 26 laser spot 28 slit (non-reflective part)
30 Cross slit (non-reflective part)
34, 36, 40 37 White sheet (light sheet)

Claims (5)

In a target for a laser surveying instrument comprising a target plate having a reflecting part for reflecting light and having a bright reference line drawn on the reflecting part,
A target for a laser surveying instrument, wherein the reflecting part is provided with at least a pair of parallel non-reflecting parts having a space narrower than the diameter of the laser spot symmetrically with respect to the reference line. The reflective part is a transparent sheet with a reflective sheet attached to the back surface of the target plate or a reflective paint applied, and the non-reflective part is a slit provided in the reflective sheet or reflective paint application part. The target for a laser surveying instrument according to claim 1, wherein the target is a laser surveying instrument. To the surface of the region other than the reflective portion of the target plate, according to claim 1, wherein the dark at target is drawn pasting a bright sheet or dark by target was printed drawn bright portion Or the target for laser surveying instruments of 2 .   4. The target for a laser surveying instrument according to claim 3, wherein the target is composed of a grid and a crosshair, and a small hole penetrating the intersection of the crosshair is provided.   The target for a laser surveying instrument according to claim 3 or 4, wherein the target is square or horizontally long.

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