JP3504791B2 - Laser level device - 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 level device for forming a reference line or a reference plane by scanning while emitting a laser beam in a vertical or horizontal direction.

[0002]

2. Description of the Related Art Positioning of a partition installed in a building, a fluorescent lamp attached to a ceiling, etc. is performed based on a marking line marked on the floor. The position indicated by the marking line is determined by a laser level device on the ceiling. It is determined by projecting on a surface, a wall surface, or the like.

A conventional laser level device, particularly a laser level device 1 for forming a vertical reference line and a vertical reference plane will be described with reference to FIG.

The laser level device 1 includes a projection system, a control unit,
It is composed of a device main body 2 having a built-in power source and the like, and a rotating part 3 having a pentaprism which rotates on the horizontal axis of rotation in the device main body 2, and is emitted from the projection system of the device main body 2. The laser beam is emitted through the pentaprism in the rotation axis and the direction orthogonal to the rotation axis, and the vertical reference plane is formed by rotating the pentaprism of the rotating portion 3. A bubble tube 4 is provided on the upper surface of the device body 2, and three legs 5 are provided on the lower surface of the device body 2, one of which is a leveling screw. You can set the level.

The work for properly setting the installation posture of the laser level device 1 has been performed as follows.

The laser level device includes one in which the rotating portion 3 itself rotates, one in which the rotating portion has a waterproof structure and only the inner rotating portion rotates, and one in which the rotating portion 3 itself rotates. Then, the operator manually adjusts the position of the laser level device while appropriately rotating the rotating portion 3. Further, in the case where the rotating portion is built in the rotating portion 3, the rotating portion cannot be rotated from the outside. Therefore, it is necessary to separately provide a mechanism for mechanically rotating the rotating portion from the outside, or to electrically provide a mechanism for rotating the rotating portion at a low speed in the forward and reverse directions by a switch.

In order to properly set the installation posture of the laser level device, first, when the rotating portion 3 itself is rotated, the laser beam 10 is aligned so that the laser beam 10 is emitted vertically downward from the rotating portion 3. Marks 8 and 9 are engraved on the apparatus body 2 and the rotating portion of the rotating portion 3, respectively, and the rotating portion 3 is manually rotated to align the alignment marks 8 and 9 and the laser beam is emitted. The laser beam is emitted vertically downward from the rotating portion 3, the irradiation point of the laser beam is aligned with a reference point on the floor surface, for example, the intersection of the marking line 6 and the marking line 7, and the laser beam scanning direction is further adjusted. In order to match the marking line 6 with the marking line 6, the rotating portion of the rotating portion 3 is rotated or reciprocally rotated within a required angle range to match the locus of the laser beam with the marking line 6. Alternatively, there is one that further emits a laser beam that coincides with the rotation axis from the rotating portion 3. In such a laser level device, the laser beam is further aligned with the intersection of the marking line 6 and the marking line 7, and further in the rotation axis direction. The installation posture is adjusted by matching the irradiation point of the laser beam emitted to the reference point with the reference point marked on the extension of the marking line 7.

Furthermore, the same applies to the case where the rotating portion 3 has a rotating portion, and the rotating portion is appropriately rotated by a switch operation so that the irradiation direction of the laser beam is vertically downward and the irradiation point is aligned with the reference point. The scanning direction of the laser beam was adjusted.

[0009]

The above-mentioned conventional laser level device requires installation at the reference position, adjustment of the scanning line direction after installation, and two adjustment operations performed while moving the rotating part, which is a complicated operation. So it took a long time to work.
Also, in the case where the rotating part is built in the rotating part,
Since the rotating part cannot be rotated from the outside, it is necessary to provide a mechanism that can mechanically or electrically rotate the rotating part forward or backward, as described above, which causes a problem that the structure is complicated. It was

In view of the above situation, the present invention aims to provide a laser level device having a simple structure and further improving the workability of installation work.

[0011]

DISCLOSURE OF THE INVENTION The present invention is directed to a light emitting section for irradiating a laser beam, a rotary section for diverting the laser beam in a direction at right angles for rotational scanning, and angle detection for detecting an angle of the rotary section. And a signal processing unit that emits a blinking signal of a laser beam based on a signal from the angle detector, and a control unit that controls blinking of the light emitting unit based on a signal from the signal processing unit, or further specified The present invention relates to a laser level device that turns off a light in a range of a required front and rear angle so as to form a spot light in a certain direction, and turns off a light so as to form a spot in a specific direction.

A spot is formed toward a positioning reference point, a laser level device is installed at the reference point by the spot, and the position of the laser level device is adjusted by a scanning line of a laser beam formed on a portion other than the spot. To do.

[0013]

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

FIG. 1 is a block diagram showing the outline of the present embodiment. In the figure, the same parts as those shown in FIG. 3 are designated by the same reference numerals, and 2 is the apparatus main body. Reference numeral 3 is a rotating portion. First, the rotating unit 3 will be described.

A rotary support 16 is rotatably provided on the apparatus main body 2, and the pentaprism 1 is attached to the rotary support 16.
5 is provided and the driven gear 17 is provided concentrically,
A drive gear 18 fitted to the output shaft of a scanning motor 19 meshes with the driven gear 17.

Next, the apparatus main body 2 will be described.

An angle detector 11 for detecting the rotation of the rotation support base 16 is provided, and a light emitting section 12 having an optical axis matching the rotation axis of the rotation support base 16 is provided. The angle detector 11 includes a rotating disc and a detecting unit, and the rotating disc has an angle detecting slit provided on the entire circumference at an equal angular pitch and a zero position detecting slit provided on only one place on the entire circumference. The detection unit detects the angle detection slit and outputs an angle pulse to the encoder unit and the encoder unit.
It has an interrupter section which detects the position detection slit and outputs a 0 set signal. The light emitting section 12 is an optical system 2 including a laser diode 20 and a collimator lens.
1 and emits a laser beam emitted from the laser diode 20 as a parallel light flux toward the pentaprism 15.

Further, the apparatus main body 2 has a signal processing unit 13, a signal from the angle detector 11 is input to the signal processing unit 13, and a signal from the signal processing unit 13 is a control unit 26. , For example, is input to the CPU. The control unit 26
Control signals are issued to a light emission control unit 27 that drives the light emitting unit 12 and a rotation control unit 28 that drives the scanning motor 19, respectively.

The signal processing unit 13 further includes an angle signal processing unit 22, a counter 23, a comparator 24, and a counter reference value setting unit 25, and a signal from the angle detector 11 is input to the angle signal processing unit 22. The angle signal processing unit 2
In 2, the required signal processing such as amplification is performed, and the pulse signal corresponding to the angle signal is input to the counter 23. The counter 23 counts the number of pulses from the angle signal processing unit 22 and outputs the counted number to the comparator 24 and the control unit 26. The counter reference value setting unit 25 can set an arbitrary number of pulses, and the set numerical value is input to the comparator 24. The comparator 24 compares the numerical value set by the counter reference value setting unit 25 with the numerical value from the counter 23, and inputs a coincidence signal to the control unit 26 when both coincide. The control unit 26 outputs a light emission control signal to the light emission control unit 27 based on the coincidence signal, and controls the light emission of the laser diode 20 via the light emission control unit 27. Further, the control unit 26 issues a rotation control signal to the rotation control unit 28, and the scanning motor 19 is transmitted via the rotation control unit 28.
Control the rotation of.

The operation will be described below with reference to FIG.

The laser beam of the parallel light beam emitted from the light emitting section 12 is deflected by the pentaprism 15 in the direction perpendicular to the optical axis and emitted from the rotating section 3. Further, the pentaprism 15 is rotated by the scanning motor 19 via a driving gear 18 and a driven gear 17, and a laser beam emitted from the pentaprism 15 is scanned to form a vertical reference plane by the laser beam. .

The 0 set signal from the interrupter section of the angle detector 11 is set so as to be emitted a predetermined angle, for example, 30 ° before the position where the laser beam is emitted vertically downward, and the 0 set signal is set. Is input to the control unit 26 via the counter 23.

When the 0 set signal is input to the counter 23, the counter value of the counter 23 is set to 0. In addition, the counter reference value setting unit 25 causes the comparator 24 to have a first set count value corresponding to an angle of less than 30 ° and a value close to 30 °, and a second set angle corresponding to a small angle in the vicinity including 30 °. The set count value and the third set count value corresponding to 60 ° are respectively input.

When a 0 set signal is input from the counter 23 to the control unit 26, an extinguishing signal is issued to the light emission control unit 27 to stop the light emission of the laser diode 20. Further, the comparator 24 compares the signal from the counter 23 with the setting value from the counter reference value setting unit 25, and when the count number matches the first setting count value, the control unit 26 receives the first value. Emits a match signal. Based on the first coincidence signal, the control unit 26 issues a light emission control signal to the light emission control unit 27 and causes the light emitting unit 12 to emit a laser beam.

Next, the comparator 24 issues a second coincidence signal to the controller 26 when the signal from the counter 23 coincides with the second set count value. Based on the second coincidence signal, the control unit 26 issues a control signal to the light emission control unit 27 to stop the light emission of the light emitting unit 12. Further, the comparator 24 issues a third coincidence signal to the control unit 26 when the count number coincides with the third set count value,
Based on the third coincidence signal, the control unit 26 causes the light emitting unit 12 to emit a laser beam via the light emission control unit 27.

As shown in FIG. 2, the emission state of the laser beam is emitted in the form of a spot vertically below and is turned off within a required angle (30 ° in the above embodiment) from below vertically. In the remaining range, the vertical reference plane is formed.

In the installation of the laser level device 1, the spot light is first made to match the intersection of the marking lines 6 and 7 in the above-mentioned light emitting state, and the locus on the floor obtained by scanning the laser beam is marked. This can be easily done by matching the line 6. Needless to say, no special operation such as stopping the rotation of the rotating unit 3 or rotating the rotating unit 3 at a low speed for installing the laser level device 1 is required.

Needless to say, the angle at which the laser beam is turned off is not limited to 30 °. Further, in the above-described embodiment, the front and rear parts are extinguished except for a part of the vertically lower part, but only part of the vertically lower part may be extinguished. Further, it goes without saying that the direction of the formed spot is not limited to the vertically downward direction, and may be any of the vertically upward direction and the horizontal direction. You may choose to do it.

Further, in the above-mentioned embodiment, the laser beam is rotated all around for scanning, but an inversion signal which is inverted when a predetermined number of pulses is reached from the signal processing unit 13 so as to reciprocally scan within a predetermined range. The spot may be set to emit light, and reciprocal scanning may be performed within a required range, for example, a required front and rear angle of the formed spot, for example, within a range of 30 °. Will increase.

[0030]

As described above, according to the present invention, the vertical laser plane formed by the laser level device can be sharply adjusted to a predetermined position without any special configuration or special work.

[Brief description of drawings]

FIG. 1 is a schematic block diagram showing an embodiment of the present invention.

FIG. 2 is an external view of the same embodiment.

FIG. 3 is an external view of a conventional example.

[Explanation of symbols]

1 Laser level device 2 device body 3 Rotating part 6 Inking line 7 Inking line 11 Angle detector 12 Light emitting part 13 Signal processor 15 Penta prism 23 counter 24 comparator 25 Counter reference value setting section 26 Control unit 27 Light emission control unit

Claims (6)

(57) [Claims] 1. A light emitting section for irradiating a laser beam, a rotating section for diverting the laser beam in a right angle direction for rotational scanning, an angle detector for detecting an angle of the rotating section, and an angle detector. A signal processing unit that emits a blinking signal of a laser beam based on the signal,
A laser level device comprising a control unit for controlling blinking of the light emitting unit based on a signal from a signal processing unit. 2. The laser level device according to claim 1, wherein the laser level device is turned off within a required front-back angle range so as to form spot light in a specific direction. 3. The laser level device according to claim 1, wherein the laser level device is turned off so as to form a spot in a specific direction. 4. The laser level device according to claim 2, wherein reciprocal scanning is performed at a required front-back angle of the formed spot. 5. The laser level device according to claim 2, wherein the specific direction is plural. 6. The laser level device according to claim 2, wherein the specific direction is at least one of a vertical downward direction, a vertical upward direction, and a horizontal direction.