JP2009008479A - Laser marker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laser marker with its operability enhanced by allowing bright line positioning to be performed on the laser marker body side. <P>SOLUTION: This laser marker can be used in combination with a light receiver 10 to detect a displacement direction of a light receiving position with respect to a light receiving reference position 11 by receiving laser light from a laser marker body 50 on the applied body side. The light receiver 10 comprises a communication means for transmitting a signal on the detected displacement direction of the receiving position. The marker body 50 comprises a movement means to change the outgoing direction of the laser light, display means 62, 64, and 66 to display a direction causing the displacement of the receiving position to be eliminated based on the signal on the displacement direction of the receiving position transmitted from the light receiver 10, an operation means allowing manual operation according to the display of the display means, and a drive means to drive the movement means in a direction displayed by the display means through the operation of the operation means. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

    The present invention relates to a laser inking device that projects laser line light for inking (hereinafter referred to as “bright line”) onto an irradiated object such as a wall, ceiling, or floor in a construction site. It is devised so that the bright line can be easily aligned with the reference position defined for the irradiated object.

  A laser marking device generally uses a semiconductor laser as a laser light source. Since the laser light emitted from the semiconductor laser is diffused light, it is made into a substantially parallel light beam by a collimator lens, and diffused only in one direction by transmitting it through a cylindrical rod lens. The laser marking device projects light onto an irradiated object such as a floor and projects vertical bright lines or horizontal bright lines by laser light. The laser marking device is suspended by the gimbal mechanism so that the light source unit holder always maintains a predetermined posture so that the vertical or horizontal emission line is correctly projected even if the installation posture is inclined, the semiconductor laser, A laser light source unit in which a collimator lens, a rod lens, and the like are integrally held by a holder is attached to the light source unit holder so that the light source unit always maintains a predetermined posture.

  When using a laser marking device at a construction site, etc., determine the installation position and orientation of the laser marking device so that the emission line passes through the reference position that was originally set on the irradiated object such as a wall, ceiling, or floor. Is desirable. However, since the position of the irradiated object and the installation position of the laser marking device are separated, it is extremely difficult to align the emission line with the reference position of the irradiated object while adjusting the setting position and orientation of the laser marking device. It is. Moreover, even if the laser marking device moves slightly, the bright line moves greatly at the position of the irradiated object, and manual adjustment is not easy. In addition, when the surroundings are bright, it may be difficult to recognize the bright lines with the naked eye, which makes it more difficult to align the bright lines to the reference position.

  Incidentally, there is a light receiver capable of confirming the bright line irradiated by the laser marking device at the position of the irradiated object. This light receiver is separate from the laser marking device and merely detects where the bright line is located by turning on the display element when the bright line is received. Therefore, even if there is a light receiver as described above, if the position of the bright line is confirmed by the light receiver, it is marked as a temporary reference point, and the position necessary for the original work from this temporary reference point. It was necessary to measure the distance to the distance using a ruler. For example, in order to produce a horizontal line at a predetermined height position of the irradiated object, a horizontal bright line irradiated to the irradiated object (this bright line is difficult to match the reference position and is shifted from the reference position). ) Is confirmed at a plurality of locations, and the distance to the target reference position is obtained by adding or subtracting at each location, and the obtained points are connected. For this reason, it is difficult to maintain the accuracy of the line at the original reference position.

  It is not impossible to irradiate the target reference position with the bright line by adjusting the position of the laser marking device. However, this requires two workers: a worker who confirms the light receiving position on the irradiated object side, and a worker who adjusts the position of the laser marking device according to the instructions of this worker. I can't.

As measures to improve this, a laser marking device body that emits laser light from a laser light source in a predetermined direction and irradiates the irradiated body with bright lines from the laser light, and laser light from the laser marking device body on the irradiated body side. A light receiving device for detecting a light receiving position shift direction with respect to a light receiving reference position, and a communication means for transmitting a light receiving position shift direction signal detected by the light receiving device to a laser mark detector body; The main body of the device controls the rotation position by driving the rotation means to change the light receiving position based on the rotation means for changing the emitting direction of the laser light and the light receiving position deviation direction signal transmitted from the light receiving device. There is known a bright line position control device for a laser marking device having means (see Patent Document 1).
JP 2004-144495 A

The bright line position control device of the laser marking device described in Patent Document 1 detects the shift direction of the light receiving position with respect to the light receiving reference position on the light receiving device side, and displays this on the display unit on the light receiving device side. Accordingly, operation switches such as a right movement switch, a left movement switch, an up movement switch, and a down movement switch that are manually operated on the light receiving device side are provided. When these operation switches are selected and operated manually, a signal corresponding to this operation is transmitted to the laser marking device body side, and on the laser marking device body side, the control means is based on the signal corresponding to the above operation, The rotating means is driven to control the rotational position in a direction that eliminates the shift of the light receiving position.
According to the bright line position control device for a laser marking device described in Patent Document 1, bright line alignment work can be easily performed. However, it has been found that further improvement is required in terms of operability. That is, the bright line alignment operation has to be performed by manually operating the operation switch of the light receiving device on the irradiated object side away from the laser marking device body, and the operability is not always good.

  From the viewpoint of operability, it is convenient if the bright line alignment control can be automatically performed while communicating between the laser marking device main body and the light receiving device which are located apart from each other. However, if the bright line alignment control is to be completely automated, the cost may increase due to the fact that technically high hurdles must be exceeded, and there is a possibility that demand cannot be expected.

  The present invention was conceived to solve the problems of the laser marking device provided with the conventional bright line position control device as described above, and bright line alignment can be performed on the laser marking device main body side. An object of the present invention is to provide a laser marking device with improved operability at low cost.

The present invention is a laser marking device that can be used in combination with a light receiving device that receives a laser beam from a laser marking device body on the irradiated body side and detects a shift direction of a light receiving position with respect to a light receiving reference position. ,
The light receiving device has communication means for transmitting a detected deviation direction signal of the light receiving position to the laser marking device body,
The laser marking device main body is a moving means for changing the emitting direction of the laser light, and a display means for displaying a direction for eliminating the shift of the light receiving position based on the shift direction signal of the light receiving position transmitted from the light receiving device, The main feature is that it has an operating means that can be manually operated according to the display of the display means, and a driving means for driving the moving means in the indicated direction by the operation of the operating means.

  The light receiving device is installed with its light receiving reference position aligned with the reference position of the irradiated object, and receives the laser light from the laser marking device body. If the light receiving position is shifted from the light receiving reference position, the light receiving device detects the shift direction and outputs a shift direction signal. The deviation direction signal is transmitted to the laser marking device body by communication means. On the laser marking device main body side, the deviation direction signal is received, and the display means displays that the moving means should be driven in a direction to eliminate the deviation of the light receiving position based on the received deviation direction signal. When the operating means is operated in accordance with this display, the driving means drives the moving means to move the laser marking device main body in a direction in which the shift of the light receiving position in the light receiving device is eliminated. Since the output of the shift direction signal is stopped at the position where the shift of the light receiving position disappears, and the display unit stops displaying, the operation of the operation unit is stopped.

  According to the laser marking device according to the present invention, the deviation direction signal from the light receiving reference position detected on the light receiving device side is received on the laser marking device body side, and the direction to eliminate the deviation is displayed on the display means. If the operating means is operated in accordance with this display, the shift of the light receiving position can be eliminated, and the operability of the light receiving position alignment can be improved. Because it is configured not to perform all the light receiving position alignment by automatic control, but to display to drive the rotation means in the direction to eliminate the light receiving position deviation based on the light receiving position deviation signal sent from the light receiving device side The structure for light receiving position alignment can be simplified, and a laser marking device that can be used in combination with a light receiving device can be provided at low cost.

Embodiments of a laser marking device according to the present invention will be described below with reference to the drawings.
The present invention provides a laser marking device body that emits laser light from a laser light source in a predetermined direction and irradiates an irradiated body with a bright line from the laser beam, and receives laser light from the laser marking device body on the irradiated body side. Thus, the light receiving device is mainly configured to detect the shift direction of the light receiving position with respect to the light receiving reference position. FIG. 5 shows the appearance of the light receiving device 10 and an example of the transmitter 20 of the detection output and the receiver 40 on the laser marking device main body 50 side. In FIG. 5, the light receiving device 10 includes a pair of square light receiving elements 12 and 14. The light receiving elements 12 and 14 are disposed adjacent to the light receiving reference position 11 as a boundary. The light receiving device 10 is arranged with the light receiving reference position 11 aligned with the reference position of the irradiated object. In this state, the bright line formed by the laser beam from the laser marking device main body is received by the light receiving unit including the light receiving elements 12 and 14.

  As shown in FIG. 5, the light receiving device 10 represents a posture in which the line representing the light receiving reference position 11 is vertical, and the light receiving elements 12 and 14 are positioned on the left and right sides of the light receiving reference position 11, or represents the light receiving reference position 11. One of the postures in which the line is in the horizontal direction and the light receiving elements 12 and 14 are positioned above and below the light receiving reference position 11 is selected and placed on the irradiated surface of the bright line. In the light receiving device 10, the light emitting element 32 that is turned on when the bright line is irradiated on the light receiving element 12, the light emitting element 36 that is turned on when the bright line is irradiated on the light receiving element 14, and the bright line indicates the light receiving reference position 11. A light emitting element 34 that emits light when it is on the line and displays that there is no shift in the light receiving position is disposed. In other words, the light emitting element 32 and the light emitting element 36 are display means for displaying the shift direction of the light receiving position. The light receiving device 10 outputs the same signal as the signal input to each of the light emitting elements 32, 34 and 36. That is, a signal output when the detection signal output from the light receiving elements 12 and 14 and the detection signal from the light receiving elements 12 and 14 are equal when the bright line is biased to one of the light receiving elements 12 and 14 is output. The These signals are input to the transmitter 20 via the connector 21. The transmitter 20 has a built-in power supply 29 and is configured so that power is supplied to the light receiving device 10 via the connector 21.

  The transmitter 20 includes an MPU 22 and a transmission circuit 26. The MPU 22 includes a ROM 23 in which a program is mainly written and a RAM 24 that stores data, and is configured to operate according to timing pulses generated by the oscillator 25. The MPU 22 receives a signal output from the light receiving device 10 through the connector 21 when the detection signals from the light receiving elements 12 and 14 are equal to the detection signals from the light receiving elements 12 and 14. The MPU 22 is configured to compare the detection signal levels by the light receiving elements 12 and 14 and output a difference signal between the two detection signals as a light receiving position shift direction signal. The output of the MPU 22 is input to the transmission circuit 26, and the transmission circuit 26 is configured to generate a high-frequency signal obtained by modulating the output from the MPU 22 and output from the antenna 28. The transmission circuit 26 operates according to the timing pulse generated by the oscillator 27.

  The high-frequency signal transmitted from the transmitter 20 on the light receiving device 10 side is received by the receiver 40 on the laser marking device body 50 side. The receiver 40 includes a receiving circuit 46 and an MPU 42. The receiving circuit 46 includes an antenna 48 that receives the high frequency, and is configured to demodulate the received high frequency signal and input the demodulated signal to the MPU 42. The receiving circuit 46 operates according to the timing pulse generated by the oscillator 47. The MPU 42 includes a ROM 43 in which a program is mainly written and a RAM 44 for storing data, and is configured to operate according to timing pulses generated by the oscillator 45. The signal demodulated by the receiving circuit 46 is a comparison calculation output of the detection signal level by the light receiving elements 12 and 14 output from the MPU 22 of the transmitter 20, and the signal input to the light emitting elements 32, 34 and 36. It is the same signal. Three light emitting elements 62, 64, 66 are connected to the MPU 42. The MPU 42 controls to light any one of the three light emitting elements 62, 64, 66 based on the signal demodulated by the receiving circuit 46. The receiver 40 operates using the battery 15 as a power source, and includes a power switch 16.

  In the example shown in FIG. 5, the receiver 40 is configured as independent from the laser marking device body 50, but the laser marking device body 50 may include the receiver 40. 1 to 4 show an example of a laser marking device body 50 having a built-in receiver 40. FIG. 1 to 4, the laser marking device main body 50 is mounted on a base 51 so as to be rotatable in a horizontal plane by a rotating means about a vertical axis. Further, a moving means for moving the laser marking device body 50 in the vertical direction with respect to the base 51 is incorporated. A known mechanism may be employed for the rotating means and moving means. For example, the rotating means is configured to mesh a pinion provided on the output shaft of the motor with a gear provided with the center aligned with the shaft, and rotate the laser marking device main body 50 by driving the motor. be able to. By driving this rotating means, the vertical bright line position emitted from the laser marking device main body 50 can be moved in the left-right direction. The moving means can be configured, for example, such that a pinion provided on the output shaft of the motor is engaged with a vertical rack provided at an appropriate position of the laser marking device body 50. By rotating the rack, the rack and the laser marking device main body 50 integrated therewith can be moved in parallel up and down, and the position of the horizontal bright line emitted from the laser marking device main body 50 can be moved in the vertical direction. The rotating means is also one of moving means because it rotates the laser marking device main body 50.

In FIG. 1 to FIG. 4, the following various switches, lamps, and display means that also serve as operation means are arranged on the upper surface of the main body cover 53 that constitutes the laser marking device main body 50. The display means that also serves as the operation means can be constituted by, for example, an operation switch with a built-in light emitting element, a so-called illumination switch.
Power indicator lamp 74: A lamp that is lit when the main power switch is on, and is composed of, for example, a light emitting diode (hereinafter referred to as “LED”). It also serves as a battery life display and normally emits light in green. When the power supply voltage drops below a predetermined voltage, it changes to red and prompts battery replacement.
Mode changeover switch 72: A switch for selecting a lighting mode. That is, a switch that switches between vertical bright line lighting and horizontal bright line lighting.
Light emitter mode switch 76: A switch for switching light emission of a semiconductor laser as a light source to either continuous light emission or pulse light emission. By switching to pulsed light emission, the light receiving device 10 can receive light. In the pulse light emission mode, the next light emitting device mode display means is lit.
Light receiving device mode display means 78: Displays that the light receiving device 10 is in use.

Light receiving position right shift display means 62: The light emitting element 62 corresponds to this. In the vertical bright line lighting mode, when the bright line is radiated toward the light receiving element 12 in a biased manner, this is displayed by lighting. For example, it comprises an illumination switch with a built-in LED, and also serves as an operating means for correcting the right shift of the light receiving position.
Further, in the horizontal bright line lighting mode, the light receiving device 10 is installed on the surface to be irradiated with the bright lines in a posture rotated 90 degrees counterclockwise in FIG. If so, the display means 62 is turned on in the same manner as described above. According to this lighting, the display means 62 that also serves as the operation means is operated.

Light receiving position left shift display means 66: The light emitting element 66 corresponds to this. In the vertical bright line lighting mode, when the bright line is radiated to the light receiving element 14 in a biased manner, this is displayed by lighting. For example, it comprises an illumination switch with a built-in LED, and also serves as an operating means for correcting the left shift of the light receiving position.
Further, in the horizontal bright line lighting mode, the light receiving device 10 is installed on the bright line irradiation target surface in a posture rotated 90 degrees counterclockwise in FIG. 5, and in this aspect, the horizontal bright line is biased toward the light receiving element 14. If so, the display means 66 is turned on in the same manner as the above operation. According to this lighting, the display means 66 that also serves as the operation means is operated.

  Center light receiving display means 64: The light emitting element 64 corresponds to this. When the bright line by the laser coincides with the reference position 11, the display means 64 emits light and displays that the bright line is in a predetermined position.

  In the main body cover 53 of the laser marking device, window holes 55 for projecting line light in the vertical direction are provided obliquely upward at three locations near the upper end. The main body cover 53 is also provided with a window hole 57 for projecting a horizontal bright line at one location in the horizontal direction. The mode changeover switch 72 selects whether to irradiate the vertical bright line, the horizontal bright line, or the vertical bright line and the horizontal bright line simultaneously.

  Now, it is assumed that the mode changeover switch 72 has selected irradiation of a vertical bright line, the light receiving device 10 is installed in a horizontally long posture as shown in FIG. 5, and the line representing the reference position 11 is oriented in the vertical direction. To do. The light emitter mode switch 76 switches the light emission mode of the semiconductor laser of the light source unit to the pulse light emission mode. It is assumed that the vertical bright line irradiated from the laser marking device body 50 is biased toward the light receiving element 12. In the light receiving device 10, the light emitting element 32 as display means emits light. The output signals of the light receiving elements 12 and 14 are input to the MPU 22 provided in the transmitter 20, and the MPU 22 calculates the detection signals of the light emitting elements 12 and 14, and modulates the high frequency signal in the transmission circuit 26 with the signal obtained by the calculation. Then, the signal is transmitted from the antenna 28.

  The high frequency signal is received by the antenna 48 of the receiver 40 on the laser marking device body 50 side and demodulated by the receiving circuit 46. The demodulated signal is the same signal as the signal obtained by the MPU 22 in the transmitter 20. This signal is analyzed by the MPU 42, and it is determined that among the light receiving elements 12, 14 of the light receiving device 21, the detection output level of the light receiving element 12 is high and the vertical bright line is biased toward the light receiving element 12. Lights up. When the light emitting element 62 is turned on, the bright line in the vertical direction is biased toward the light receiving element 12, and this indicates that the bright line should be moved to the left side. Since the light emitting element 62 constitutes a light receiving position right shift display means composed of an illumination switch, the user of the inking device operates the light receiving position right shift display means incorporating the light emitting element 62.

  By the above operation, the above rotating mechanism rotates the laser marking device in the horizontal plane. This rotation direction is a direction in which the vertical bright line approaches the line indicating the reference position 11 in the light receiving device 21. When the bright line coincides with a line indicating the reference position 11, the detection outputs of the light receiving elements 12, 14 are balanced, the light emitting element 34 of the light receiving device 10 emits green light, for example, and the MPU 22 outputs a signal corresponding thereto. This signal is modulated and transmitted from the transmission circuit 26 to a high frequency signal, demodulated by the reception circuit 46 of the receiver 40, and the MPU 42 causes the light emitting element 64 as the instruction means to emit green light, for example. Since the user knows that the bright line coincides with the reference position 11 by the light emission of the light emitting element 64, the user stops the operation of the light receiving position right shift display means and stops the rotation of the laser marking device body 50.

  When the vertical bright line is biased toward the light receiving element 14, the light emitting element 36 is turned on, and a signal corresponding to a signal for turning on the light emitting element 36 is transmitted from the transmitter 20. The receiver 40 receives the signal, demodulates it, analyzes it with the MPU 42, and turns on the light emitting element 66. When the light emitting element 66 is lit, the bright line in the vertical direction is biased toward the light receiving element 14, and this indicates that the bright line should be moved to the right side. Since the light emitting element 66 constitutes a light receiving position left shift display means including an illumination switch, the user of the ink depressor operates the light receiving position left shift display means including the light emitting element 66. By this operation, the rotation mechanism drives the laser marking device to rotate in the horizontal plane so that the vertical emission line light approaches the line indicating the reference position 11 in the light receiving device 21. When the bright line coincides with the line indicating the reference position 11, the light emitting element 34 of the light receiving device 10 emits light as described above, and the light emitting element 64 emits light on the receiver 40 side. Since the user knows that the bright line coincides with the reference position 11 by the light emission of the light emitting element 64, the user stops the operation of the light receiving position left shift display means and stops the rotation of the laser marking device body 50.

  When the mode switch 72 is switched to the horizontal line lighting mode, the light receiving device 10 is rotated 90 degrees counterclockwise in FIG. 5 to have a vertically long posture, and the line indicating the reference position 11 is in the horizontal direction. Install as follows. By doing so, the light emitting element 32 of the light receiving device 10 and the light emitting element 62 on the receiver 40 side are turned on when the horizontal bright line is radiated to the upper light receiving element 12, and the light emitting element 33 of the light receiving device 10 The light emitting element 66 on the receiver 40 side is lit when the horizontal bright line is radiated to the lower light receiving element 14 in a biased manner. Therefore, when the light emitting element 62 on the receiver 40 side is lit, the user operates an illumination switch incorporating the light emitting element 62. This illumination switch serves as both display means for displaying the direction in which the shift of the light receiving position is eliminated and operation means that can be manually operated according to the display on the display means. By operating the illumination switch incorporating the light emitting element 62, the laser marking device main body 50 is moved downward in parallel with respect to the base 51 by driving the aforementioned moving means. By this operation, the horizontal bright line approaches a line indicating the reference position 11, and when the horizontal bright line coincides with this line, the light emitting element 34 on the light receiving device 10 side is turned on, and the light emitting element 64 on the receiver 40 side is turned on. When the light emitting element 64 is turned on, the operation of the illumination switch is stopped, the movement of the laser marking device main body 50 is stopped, and the state where the horizontal bright line coincides with the reference position 11 is maintained.

  When the horizontal bright line is emitted to the lower light receiving element 14 in a biased manner, the light emitting element 36 of the light receiving device 10 and the light emitting element 66 on the receiver 40 side are turned on. The user operates an illumination switch incorporating the light emitting element 66. The laser marking device main body 50 moves upward in parallel with respect to the base 51 when the aforementioned moving means is driven. The horizontal bright line approaches a line indicating the reference position 11, and when the horizontal bright line coincides with the line, the light emitting element 34 on the light receiving device 10 side is turned on, and the light emitting element 64 on the receiver 40 side is turned on. When the light emitting element 64 is turned on, the operation of the illumination switch is stopped, the movement of the laser marking device main body 50 is stopped, and the state where the horizontal bright line coincides with the reference position 11 is maintained.

  According to the laser marking device according to the embodiment described above, the user observes the display means for instructing the direction to eliminate the shift of the light receiving position at the hand of the laser marking device, and manually operates the operation means according to the display on the display means. By operating, the bright line by the laser can be adjusted to a predetermined reference position, so that the operability of alignment of the bright line can be improved. In addition, the bright line alignment is not performed fully automatically, but by manual operation according to the display, so the configuration of the electrical control circuit can be simplified and the bright line alignment operation is easy. A laser marking device can be provided at low cost.

  The operation of manually adjusting the operating means according to the display on the display means to adjust the laser emission line to a predetermined reference position as a rough adjustment operation. After the rough adjustment, the control means controls the operation of the driving means to detect the light receiving position. The fine adjustment operation may be performed by driving the moving means in a direction to eliminate the deviation. Even with this configuration, the configuration can be simplified and the cost can be reduced as compared with the automatic alignment of bright lines.

The receiver 40 shown in FIG. 5 may be incorporated into the laser marking device main body 50 as in the example shown in FIGS. 1 to 4 or separated from the laser marking device main body 50 as an independent receiver. It may be configured. In the latter case, the light emitting elements 62, 64, and 66 that display the positional deviation of the bright lines are arranged on the receiver 40 side. The operation member operated by turning on the light emitting element 62 or 66 is provided on the laser marking device main body 50 side, and the rotation means or the moving means is driven by the operation of the operation member. The bright lines are aligned by being driven to rotate in the horizontal plane or translated in the vertical direction.
Or the display means which displays the direction which eliminates the shift | offset | difference of a light reception position based on the shift direction signal of the light reception position transmitted from the light-receiving device may be provided separately from the laser marking device main body.

  In the illustrated embodiment, it is assumed that radio waves are used as communication means between the light receiving device 10 side and the laser marking device body 50, but communication means other than radio waves, for example, communication means using light are used. Also good.

It is a perspective view which shows the Example of the laser marking device which concerns on this invention. It is a top view of the said Example. It is a front view of the said Example. It is a side view of the said Example. It is a circuit block diagram which shows the example of the light-receiving device, transmitter, and receiver which are used for this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Light receiving device 20 Transmitter 32 Light emitting element as display means 34 Light emitting element as display means 36 Light emitting element as display means 40 Receiver 50 Laser marking device main body 62 Operation means / display means 64 Light emitting element 66 Operation means / display means

Claims (7)

A laser marking device that can be used in combination with a light receiving device that receives laser light from a laser marking device body on the irradiated body side and detects a shift direction of a light receiving position with respect to a light receiving reference position,
The light receiving device has communication means for transmitting a detected deviation direction signal of the light receiving position to the laser marking device body,
The laser marking device main body is a moving means for changing the emitting direction of the laser light, and a display means for displaying a direction for eliminating the shift of the light receiving position based on the shift direction signal of the light receiving position transmitted from the light receiving device, A laser marking device comprising: operating means that can be manually operated according to the display of the display means; and driving means for driving the moving means in the indicated direction by operation of the operating means. 2. The laser marking device according to claim 1, wherein the moving means is a mechanism for rotating the laser marking device main body in a horizontal plane with respect to the base. 2. The laser marking device according to claim 1, wherein the moving means is a mechanism for moving the laser marking device main body vertically with respect to the base. 2. The laser marking device according to claim 1, wherein the light receiving device has light receiving portions at both sides of the light receiving reference position, and outputs a difference signal between detection outputs of the light receiving portions as a shift direction signal of the light receiving position. 2. The laser marking device according to claim 1, wherein the light receiving device has display means for displaying a shift direction of the light receiving position. The operation of the drive means by operating according to the display on the display means is a coarse adjustment operation, and after the coarse adjustment, the control means controls the operation of the drive means to drive the moving means in a direction that eliminates the deviation of the light receiving position. The laser marking device according to claim 1, wherein fine adjustment operation is performed. 2. The laser marking device according to claim 1, wherein display means for displaying a direction for eliminating the shift of the light receiving position based on the light receiving position shift direction signal transmitted from the light receiving device is provided separately from the laser marking device body. .

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