JP7433202B2 - Ceiling marking laser device and ceiling marking method - Google Patents

Description

The present invention relates to a ceiling marking laser device that irradiates a ceiling with laser light for marking, and a method for marking a ceiling.

When installing an opening in the ceiling, it is necessary to mark the position of the opening on the ceiling surface. As a device for easily marking out the ceiling, a ceiling marking device has been proposed that uses a laser device placed on the floor to irradiate a laser beam onto a rectangular shape corresponding to an opening in the ceiling (for example, Patent Document 1 , 2).

Japanese Patent Application Publication No. 2006-58153 Japanese Patent Application Publication No. 2000-91254

Incidentally, air conditioning equipment may be replaced during building renovation work or the like. In this case, the indoor unit may be replaced in the ceiling and an additional opening for inspection of the indoor unit may be provided near the indoor unit. At this time, it is necessary to mark the position of the opening, but if desks, chairs, cabinets, etc. are arranged in the room, and as described in Patent Documents 1 and 2, it is necessary to mark the position of the opening. In some cases, the ejection device cannot be used.

Therefore, an object of the present invention is to irradiate a ceiling surface with a marking laser beam without disposing a laser device on the floor surface.

The ceiling marking laser device of the present invention irradiates a rope with both ends attached to an opening in the ceiling or on both sides of a device attached to the ceiling, and a pulley around which the rope is wound with a laser beam in a linear manner. a laser irradiation device comprising a laser irradiation device; the laser irradiation device is suspended from the ceiling by wrapping a central portion of the rope around the pulley of the laser irradiation device; A linear laser beam is irradiated from the laser irradiator to the ceiling surface with reference to an opening in the ceiling or the device attached to the ceiling.

In this way, the laser irradiation device is suspended from the ceiling by ropes with both ends attached to the opening in the ceiling or to both ends of the equipment mounted on the ceiling, so gravity allows the laser irradiation device to be positioned on the center line of the opening or equipment. , the ceiling surface can be irradiated with a linear laser beam based on the opening or equipment. Further, the ceiling surface can be irradiated with a marking laser beam without disposing a laser irradiation device on the floor surface.

In the ceiling marking laser device of the present invention, the linear laser beam irradiated onto the ceiling surface by the laser irradiator passes through an opening in the ceiling or the center of both ends of the device attached to the ceiling. , may include a centerline laser beam extending in a direction orthogonal to a virtual line connecting the both ends.

Thereby, the centerline laser beam can be irradiated onto the ceiling surface so as to overlap with the centerline of the opening or the device, and the centerline of the opening can be easily marked on the ceiling surface.

In the ceiling marking laser device of the present invention, the linear laser beam that the laser irradiator irradiates onto the ceiling surface is the virtual line that connects the opening in the ceiling or the both ends of the equipment attached to the ceiling. It may further include at least one horizontal line laser beam parallel to the line and intersecting the center line laser beam.

Thereby, laser light for marking out the center line of the opening and the edge of the opening can be easily irradiated.

In the ceiling marking laser device of the present invention, the laser irradiation device includes a drive mechanism that changes the emission angle of the laser beam of the laser irradiator, and a control section that controls the operation of the drive mechanism, and the The control unit calculates the vertical distance between the laser irradiator and the ceiling surface based on the winding angle of the rope around the pulley, and the calculated vertical distance between the laser irradiator and the ceiling surface; of the laser irradiation device in a vertical virtual plane containing the centerline laser beam based on the horizontal distance along the centerline laser beam from the laser beam emission opening of the laser irradiation device to the horizontal line laser beam. The irradiation angle of the horizontal line laser beam with respect to the vertical direction may be calculated, and the driving mechanism may adjust the emission angle of the laser beam of the laser irradiator to the irradiation angle to irradiate the horizontal line laser beam onto the ceiling surface. .

Thereby, it is possible to easily irradiate the edge of the opening with laser light for marking out.

In the ceiling marking laser device of the present invention, the laser irradiation device includes a pulley drive unit that rotationally drives the pulley, and the control unit is configured such that the laser irradiation device is attached to an opening in the ceiling or to the ceiling. The pulley drive unit may rotate the pulley to adjust the winding position of the pulley with respect to the rope so that the pulley is centered between the both ends of the device.

Thereby, the position of the laser irradiator can be more accurately placed at the center of both sides of the opening or the device, and the ceiling surface can be easily irradiated with laser light for marking out the center line of the opening.

The ceiling marking method of the present invention includes a preparatory step of preparing a rope, a laser irradiation device including a pulley around which the rope is wound, and a laser irradiator that irradiates laser light in a linear manner; a rope attachment step of attaching both ends of the rope to both ends of the device attached to the ceiling; and a hanging step of hanging the laser irradiation device from the ceiling by wrapping the center portion of the rope around the pulley of the laser irradiation device. and a laser irradiation step of irradiating a ceiling surface with a linear laser beam from the laser irradiator with reference to the opening in the ceiling or the device attached to the ceiling. .

In the ceiling marking method of the present invention, the laser irradiation step passes through the opening in the ceiling or the center of the both ends of the equipment attached to the ceiling, and extends in a direction perpendicular to an imaginary line connecting the both ends. The ceiling surface may be irradiated with an extending centerline laser beam from the laser irradiator.

In the ceiling marking method of the present invention, the laser irradiation step further includes irradiating the laser beam parallel to the imaginary line connecting the opening in the ceiling or the both ends of the equipment attached to the ceiling and intersecting the center line laser beam. The ceiling surface may be irradiated with at least one horizontal laser beam from the laser irradiator.

In the ceiling marking method of the present invention, the vertical distance between the laser irradiator and the ceiling surface is calculated based on the winding angle of the rope around the pulley, and the vertical distance between the laser irradiator and the ceiling surface is calculated. Based on the vertical distance and the horizontal distance along the centerline laser beam from the laser beam emission port of the laser irradiator to the horizontal line laser beam, in a vertical virtual plane containing the centerline laser beam. The irradiation angle of the horizontal line laser beam with respect to the vertical direction of the laser irradiation device may be calculated, the emission angle of the laser beam of the laser irradiator may be adjusted to the irradiation angle, and the horizontal line laser beam may be irradiated onto the ceiling surface. good.

According to the present invention, a laser beam for marking can be irradiated onto a ceiling surface without disposing a laser device on the floor surface.

FIG. 1 is a perspective view showing the configuration of a ceiling marking laser device according to an embodiment. FIG. 2 is an elevational view of the ceiling marking laser device of the embodiment as viewed from arrow A in FIG. 1. FIG. FIG. 2 is an elevational view of the ceiling marking laser device of the embodiment as seen from arrow B in FIG. 1. FIG. It is a perspective view of the marking jig used when marking a newly installed opening on a ceiling surface using the ceiling marking laser device of the embodiment. It is a flowchart which shows the procedure of marking a newly installed opening on a ceiling surface using the laser device for ceiling marking of an embodiment.

Hereinafter, the configuration of the ceiling marking laser device 100 of the embodiment will be described with reference to the drawings. As shown in FIG. 1, a ceiling marking laser device 100 includes a rope 20 and a laser irradiation device 10. In the following description, the ceiling marking laser device 100 is suspended from both ends 58 and 59 of an existing opening 50 provided in the ceiling panel 40 for attaching an existing air conditioner (not shown). , will be described as being used to mark out for installation of a new opening 60 adjacent to the existing opening 50. Further, in FIGS. 1 to 3, the direction in which the existing opening 50 and the new opening 60 are lined up on the ceiling surface 41 will be described as the Y direction, the direction orthogonal to the Y direction as the X direction, and the vertical direction as the Z direction.

As shown in FIG. 1, the laser irradiation device 10 includes a laser irradiator 12 inside a casing 11 to which a pulley 13 is rotatably attached, and a drive mechanism 15 that changes the emission angle of the laser beam of the laser irradiator 12. , a pulley drive section 14 that rotationally drives the pulley 13, and a control section 16 are housed therein. The pulley 13 is rotatably attached inside the casing 11. Moreover, the center of gravity position 19 of the laser irradiation device 10 is below the pulley 13 in the Z direction.

The laser irradiator 12 irradiates a linear laser beam onto the ceiling surface 41 of the ceiling panel 40 from a laser beam emission opening 12a. The linear laser beam may be configured to irradiate the ceiling surface 41 with an optical element such as an optical fiber, a prism, or a lens, or it may be configured to irradiate the ceiling surface 41 with a laser pointer at high speed. It may be configured so that the surface 41 appears to be irradiated with a linear laser beam. The laser beam emission port 12a of the laser irradiator 12 is located at the center of the laser irradiator 10, and, like the center of gravity 19, is located below the pulley 13 in the Z direction. Further, the laser beam emission opening 12a is located on the positive side of the Y direction by a distance D from the pulley 13.

The rope 20 may have a thickness that allows it to be wrapped around the pulley 13 of the laser irradiation device 10. One end 21 and the other end 22 of the rope 20 are connected to one side end 58 and the other side end 59 of the existing opening 50, respectively, and are attached to the ceiling panel 40 so as to hang down from both ends 58 and 59 in a V-shape. installed. Therefore, the V-shaped hanging central portion 23 of the rope 20 is located in the center of both ends 58, 59.

The existing opening 50 has four end faces 51, 52, 54: an end face 51 on the negative side in the Y direction, an end face 52 on the positive side in the Y direction, an end face 54 on the negative side in the X direction, and an end face 55 on the positive side in the X direction. 55 is a square opening. Both ends 58 and 59 are located at the positive end in the X direction and the negative end in the X direction of the end surface 52 on the positive side in the Y direction. Further, the center line 56 of the existing opening 50 in the Y direction is a virtual line extending in the Y direction at the center of both ends 58 and 59. Further, since the virtual line 52a connecting the both side ends 58 and 59 is a virtual line extending in the X direction orthogonal to the Y direction, the center line 56 of the existing opening in the Y direction passes through the center of the both side ends 58 and 59, This is a line that extends in a direction perpendicular to the virtual line 52a connecting both side ends 58 and 59.

Moreover, the center line 57 of the end surface 52 on the positive side in the Y direction, which extends in the Z direction at the center of the existing opening 50 in the X direction, is a virtual line extending in the Z direction at the center of both ends 58 and 59. Further, the center line 57 is a line passing through the center portion 23 of the rope 20 hanging down in a V-shape.

As explained above, the rope 20 is attached to the existing opening 50, and the rope 20 is attached to the pulley 13 so that the rotation axis 13a of the pulley 13 of the laser irradiation device 10 is parallel to the Y axis and intersects the center line 57. When the rope is wound, the load of the laser irradiation device 10 is applied to the vicinity of the center portion 23 of the rope 20 . Since the center of gravity 19 of the laser irradiation device 10 is located below the pulley 13 in the Z direction, the pulley 13 rotates due to its own weight, and the center of gravity 19 of the laser irradiation device 10 moves to the center 23 of the rope 20. . Thereby, the center position of the laser irradiation device 10 becomes the center of both side ends 58 and 59.

In addition, since the center of gravity 19 of the laser irradiation device 10 is located below the pulley 13 in the Z direction, the laser irradiation device 10 is attached to the ceiling via the rope 20 so that the rotation axis 13a of the pulley 13 is horizontal. It is suspended from the panel 40. In this way, the laser beam emission port 12a of the laser irradiator 12, which is located at the center of the laser irradiator 10, is located at the center of both ends 58, 59, at a vertical distance H downward from the ceiling surface 41. It is located on the positive side in the Y direction by a distance D from the center line 57, and is suspended from the ceiling panel 40 so that the radiation port 12a faces in the direction in which the center line 56 extends.

Further, if the center of gravity position 19 of the laser irradiation device 10 and the laser beam emission port 12a of the laser irradiation device 12 are not in the center of the both ends 58 and 59 due to the rotation of the pulley 13, the control unit 16 of the laser irradiation device 10 , the pulley 13 shown in FIG. 2 is rotationally driven by the pulley drive unit 14 so that the center of gravity 19 of the laser irradiation device 10 and the laser beam emission port 12a of the laser irradiator 12 are at the center of both ends 58 and 59. The winding position of the pulley 13 may be adjusted.

As described above, when a laser beam is irradiated linearly toward the ceiling surface 41 from the laser beam emission port 12a of the laser irradiator 12 of the laser irradiation device 10 suspended from the ceiling panel 40 via the rope 20, the ceiling surface 41 is irradiated with a centerline laser beam 31 extending in the Y direction along the centerline 56 of the existing opening 50 in the Y direction.

This centerline laser beam 31 is a line that passes through the center of both ends 58 and 59 and extends in a direction perpendicular to an imaginary line 52a connecting both ends 58 and 59, similar to the center line 56 of the existing opening 50 in the Y direction. becomes. That is, the centerline laser beam 31 is a linear laser beam that is irradiated onto the ceiling surface 41 using the centerline 56 of the existing opening 50 of the ceiling panel 40 as a reference.

Next, a case will be described in which the laser irradiation device 10 irradiates a predetermined position on the ceiling surface 41 with horizontal line laser beams 32 and 33 that intersect with the center line laser beam 31. Here, the horizontal laser beams 32 and 33 are laser beams that extend linearly in the X direction at the Y direction positions of the end surface 62 on the negative side in the Y direction and the end surface 63 on the positive side in the Y direction of the newly installed opening 60, respectively.

As shown in FIG. 2, when the center portion 23 of the rope 20 is wound around the pulley 13, the rope 20 is stretched in a V-shape with the center portion 23 as the lower end, and is wound around the pulley 13 of the rope 20. The wrapping angle is 2α. The laser irradiation device 10 includes a winding angle detection means (not shown) for detecting the winding angle of the rope 20 therein. The winding angle detection means includes, for example, a camera that images the pulley 13 and the vicinity of the central portion 23 of the rope 20 from the Y-axis direction, and a calculator that processes the image taken by the camera to calculate the winding angle of the rope 20. It may also consist of means. Further, the winding angle detection means may include a calculation means that detects the contact position between the pulley 13 and the rope 20 and calculates the winding angle at this contact position.

Here, with reference to FIGS. 2 and 3, based on the winding angle of the rope 20 detected by the winding angle detection means (angle 2α in the example shown in FIG. 2), the laser beam emission opening shown in FIG. A method for calculating angles θ1 and θ2 between the direction from 12a toward the horizontal laser beams 32 and 33 and the direction perpendicular to the ceiling surface 41 will be described. Here, the angles θ1 and θ2 are the irradiation angles of the horizontal laser beams 32 and 33 with respect to the vertical direction of the laser irradiation device 10.

First, based on the winding angle of the rope 20 detected by the winding angle detection means (angle 2α in the example shown in FIG. 2), the distance between the ceiling surface 41 and the rotation axis 13a of the pulley 13 is calculated using the following formula 1. A first vertical distance h1 is calculated. Here, L0 is the length of the rope 20 and is a known value.
h1=L0/2*cos(α) --- (Formula 1)

As shown in FIG. 2, since the vertical distance between the rotation axis 13a of the pulley 13 and the center of the laser irradiator 12 is h2 (a known value), the vertical distance between the ceiling surface 41 and the center of the laser irradiator 12 is H. is expressed by the following equation 2.
H=h1+h2
=L0/2*cos(α)+h2 --- (Formula 2)

The Y-direction positions of the horizontal line laser beams 32 and 33 are located at the Y-direction positions of the end face 62 on the negative side in the Y direction and the end face 63 on the positive side in the Y direction of the new opening 60, and as shown in FIG. The horizontal distances in the Y direction from the end surface 52 on the positive side are positions L1 and L2, respectively. Here, the end surface 52 of the existing opening 50 on the positive side in the Y direction is a surface through which the center line 57 passes, and the position of the laser beam emission opening 12a of the laser irradiator 12 is a distance from the center line 57 on the positive side in the Y direction. It's only D apart. Therefore, a horizontal line from the laser beam emission opening 12a in the vertical imaginary plane 39 where the center line 57 is located, that is, the vertical imaginary plane 39 containing the center line laser beam 31 at the center of both ends 58, 59 of the existing opening 50. The angle θ1 between the direction toward the laser beam 32 and the direction perpendicular to the ceiling surface 41 is calculated using the following equation 3.
θ1=tan ^-1 ((L1-D)/H) --- (Formula 3)

Similarly, the angle θ2 between the direction of the laser beam from the radiation aperture 12a toward the horizontal laser beam 33 within the vertical virtual plane 39 and the direction perpendicular to the ceiling surface 41 is calculated using the following equation 4. Ru.
θ2=tan ^-1 ((L2-D)/H) --- (Formula 4)
In Equations 3 and 4, distances L1, L2, and D are known values.

Substituting the above equations 1 and 2 into equations 3 and 4, based on the winding angle of the rope 20, the direction from the laser beam emission port 12a to the horizontal laser beams 32, 33 and the ceiling surface shown in FIG. Equations 5 and 6 for calculating the angles θ1 and θ2 formed with the perpendicular direction to 41 are as follows.
θ1=tan ^-1 ((L1-D)/(L0/2*cos(α)+h2)) - (Formula 5)
θ2=tan ^-1 ((L2-D)/(L0/2*cos(α)+h2)) - (Formula 6)

Therefore, the control unit 16 of the laser irradiation device 10 detects the winding angle 2α of the rope 20 using the winding angle detection means described above, and calculates the winding angle 2α based on the detected winding angle 2α using equations 5 and 6. Calculate θ1 and θ2. Then, the control unit 16 uses the drive mechanism 15 to adjust the angle θ1 between the direction of the laser beam from the emission port 12a toward the horizontal laser beams 32 and 33 within the vertical virtual plane 39 and the direction perpendicular to the ceiling surface 41. , or adjust to θ2. As a result, the ceiling surface 41 is irradiated with horizontal line laser beams 32 and 33 extending in a direction perpendicular to the center line laser beam 31 from the laser irradiator 12 .

Thereby, the ceiling marking laser device 100 emits linear horizontal laser beams 32 and 33 on the ceiling surface 41 at positions L1 and L2 apart in the Y direction with reference to the end surface 52 on the positive side in the Y direction of the existing opening 50. can be irradiated.

As described above, the ceiling marking laser device 100 irradiates the ceiling surface 41 with the centerline laser beam 31 along the centerline 56 of the existing opening 50 in the Y direction, and also on the positive side of the existing opening 50 in the Y direction. Horizontal laser beams 32 and 33 are irradiated to positions spaced apart by L1 and L2 in the Y direction with respect to the end surface 52 of . The center line laser beam 31 is located at the center line 61 of the newly installed opening 60, and the horizontal line laser beams 32 and 33 are located at the end surface 62 on the negative side in the Y direction and the end surface 63 on the positive side in the Y direction of the newly installed opening 60, respectively. be.

Therefore, when marking the position of the newly installed opening 60 on the ceiling surface 41, the opening position of the newly installed opening 60 is marked on the ceiling surface 41 using a marking jig 70 as shown in FIG.

The marking jig 70 shown in FIG. 4 has a rectangular frame-shaped main body 71 having the same external dimensions as the new opening 60, a handle 76 attached to the top of the main body 71, and a handle 76 attached to two opposing end surfaces of the main body 71. It consists of a pin 77 that is A mark 78 is attached to the center of the pin 77 in the width direction.

When marking the opening position of the new opening 60, set the mark 78 of the pin 77 in the direction of the center line laser beam 31, align one end surface 72 of the main body 71 with the position of the horizontal line laser beam 32, and align the opposite side The end face 73 of the laser beam 33 is aligned with the position of the horizontal line laser beam 33. Then, a marking means such as a pencil is moved along the four end faces 72 to 75 to mark out the newly installed opening 60 on the ceiling surface 41.

In the ceiling marking laser device 100 of the embodiment described above, the laser irradiation device 10 is suspended from the ceiling panel 40 by a rope 20 with both ends 21 and 22 attached to both ends 58 and 59 of the existing opening 50 of the ceiling panel 40. Therefore, the laser irradiation device 10 is positioned on the center lines 56 and 57 of the existing opening 50 due to gravity, and the linear center line laser beam 31 and horizontal line laser beams 32 and 33 are directed to the ceiling surface 41 based on the existing opening 50. can be irradiated.

In addition, since the ceiling marking laser device 100 irradiates the ceiling surface 41 with the center line laser beam 31 and horizontal line laser beams 32 and 33 without placing the laser irradiation device 10 on the floor surface, it is possible to place a desk or chair on the floor surface. Even when performing repair work on an air conditioner while equipment such as the above is installed, the new opening 60 can be easily marked on the ceiling surface 41.

In the above description, the laser irradiation device 10 is suspended by attaching both ends 21 and 22 of the rope 20 to both ends 58 and 59 of the existing opening 50, but the present invention is not limited to this. As long as it can be used as a reference position for the position of the new opening 60, it is not limited to the existing opening 50, and both ends 21 and 22 of the rope 20 can be attached to both ends of the air conditioning equipment and lighting equipment attached to the ceiling panel 40. The laser irradiation device 10 may be suspended by attaching a .

The configuration and operation of the ceiling marking laser device 100 have been described above. The laser irradiation device 10 is suspended from the ceiling panel 40 by the rope 20, and the ceiling surface 41 is irradiated with a linear laser to mark the new opening 60. The marking process may be performed manually. In this case, the procedure for performing each marking is as shown in the flowchart shown in FIG.

First, as shown in step S101 in FIG. 5, a laser irradiation device 10 that includes a rope 20, a pulley 13 around which the rope 20 is wound, and a laser irradiator 12 that irradiates a laser beam in a linear manner is prepared ( preparation process).

Next, as shown in step S102 in FIG. 5, both ends 21 and 22 of the rope 20 are attached to both ends 58 and 59 of the existing opening 50 of the ceiling panel 40 (rope attachment step).

Next, as shown in step S103 in FIG. 5, the center portion 23 of the rope 20 is wrapped around the pulley 13 of the laser irradiation device 10 to suspend the laser irradiation device 10 from the ceiling panel 40 (hanging step).

Then, as shown in step S104 in FIG. 5, a linear laser beam is irradiated from the laser irradiator 12 onto the ceiling surface 41 using the existing opening 50 of the ceiling panel 40 as a reference (laser irradiation step). In the laser irradiation step, a centerline laser beam 31 passes through the center of both ends 58 and 59 of the existing opening 50 of the ceiling panel 40 and extends in a direction perpendicular to the virtual line 52a connecting the both ends 58 and 59, and the ceiling panel The laser irradiator 12 may irradiate the ceiling surface with horizontal laser beams 32 and 33 that are parallel to an imaginary line 52a connecting the opposite ends 58 and 59 of the 40 existing openings 50 and intersect with the centerline laser beam 31.

Then, as shown in step S105 in FIG. 5, the marking jig 70 described with reference to FIG. 41, the newly installed opening 60 is marked out.

In this way, even when manually marking the new opening 60 on the ceiling surface 41, the center line laser beam 31 and the horizontal line laser beams 32, 33 can be applied to the ceiling surface 41 without placing the laser irradiation device 10 on the floor. Since it can be irradiated, new openings 60 can be easily marked on the ceiling surface 41 even when repairing the air conditioner with equipment such as desks and chairs placed on the floor.

Reference Signs List 10 laser irradiation device, 11 casing, 12 laser irradiator, 12a radiation port, 13 pulley, 13a rotating shaft, 14 pulley drive unit, 15 drive mechanism, 16 control unit, 19 center of gravity position, 20 rope, 21 one end, 22 other end , 23 central part, 31 center line laser beam, 32, 33 horizontal line laser beam, 39 vertical virtual plane, 40 ceiling panel, 41 ceiling surface, 50 existing opening, 51, 52, 54, 55, 62, 63, 72-75 End face, 52a Virtual line, 56, 57, 61 Center line, 58, 59 Side edge, 60 New opening, 70 Marking jig, 71 Main body, 76 Handle, 77 Pin, 78 Mark, 100 Marking laser device.

Claims (9)

a rope with both ends attached to an opening in the ceiling or to both ends of the equipment attached to the ceiling;
A laser irradiation device for ceiling marking, comprising: a pulley around which the rope is wound; and a laser irradiation device that irradiates laser light in a linear manner;
The center part of the rope is wound around the pulley of the laser irradiation device to suspend the laser irradiation device from the ceiling, and the laser irradiation device is suspended from the ceiling with reference to the opening in the ceiling or the device attached to the ceiling. Irradiating the ceiling surface with a linear laser beam,
A laser device for marking ceilings featuring: The ceiling marking laser device according to claim 1,
The linear laser light that the laser irradiator irradiates onto the ceiling surface passes through the opening in the ceiling or the center of both ends of the device attached to the ceiling, and is directed toward an imaginary line connecting the both ends. comprising a centerline laser beam extending in orthogonal directions;
A laser device for marking ceilings featuring: The ceiling marking laser device according to claim 2,
The linear laser beam that the laser irradiator irradiates onto the ceiling surface is parallel to the opening in the ceiling or the imaginary line connecting the both ends of the equipment attached to the ceiling, and intersects with the center line laser beam. further comprising at least one horizontal line laser beam that
A laser device for marking ceilings featuring: The ceiling marking laser device according to claim 3,
The laser irradiation device includes a drive mechanism that changes the emission angle of the laser beam of the laser irradiation device;
a control unit that controls the operation of the drive mechanism;
The control unit includes:
Calculating the vertical distance between the laser irradiator and the ceiling surface based on the winding angle of the rope around the pulley;
Based on the calculated vertical distance between the laser irradiator and the ceiling surface and the horizontal distance along the center line laser beam from the laser beam emission opening of the laser irradiator to the horizontal line laser beam, Calculating the irradiation angle of the horizontal line laser beam with respect to the vertical direction of the laser irradiation device in a vertical virtual plane containing the center line laser beam,
irradiating the ceiling surface with the horizontal line laser beam by adjusting the emission angle of the laser beam of the laser irradiator to the irradiation angle by the drive mechanism;
A laser device for marking ceilings featuring: The ceiling marking laser device according to claim 4,
The laser irradiation device is
including a pulley drive unit that rotationally drives the pulley,
The control unit includes:
The pulley is rotated by the pulley drive unit to determine the position at which the pulley is wrapped around the rope so that the laser irradiator is located at the center of the opening in the ceiling or the both ends of the device attached to the ceiling. to adjust,
A laser device for marking ceilings featuring: A ceiling marking method,
a preparatory step of preparing a laser irradiation device comprising a rope, a pulley around which the rope is wound, and a laser irradiation device that irradiates laser light in a linear manner;
a rope attachment step of attaching both ends of the rope to an opening in the ceiling or both ends of the equipment attached to the ceiling;
a hanging step of hanging the laser irradiation device from the ceiling by wrapping the center portion of the rope around the pulley of the laser irradiation device;
a laser irradiation step of irradiating a ceiling surface with a linear laser beam from the laser irradiator with reference to the opening in the ceiling or the device attached to the ceiling;
A ceiling marking method featuring: The ceiling marking method according to claim 6,
The laser irradiation step includes irradiating the laser with a centerline laser beam that passes through the opening in the ceiling or the center of both ends of the device attached to the ceiling and extends in a direction orthogonal to a virtual line connecting the both ends. irradiating the ceiling surface from the vessel;
A ceiling marking method featuring: The ceiling marking method according to claim 7,
The laser irradiation step further includes emitting at least one horizontal line laser beam, which is parallel to the opening in the ceiling or the virtual line connecting the both ends of the equipment attached to the ceiling and intersecting the center line laser beam, to the laser beam. irradiating the ceiling surface from an irradiator;
A ceiling marking method featuring: The ceiling marking method according to claim 8,
Calculating the vertical distance between the laser irradiator and the ceiling surface based on the winding angle of the rope around the pulley;
Based on the calculated vertical distance between the laser irradiator and the ceiling surface and the horizontal distance along the center line laser beam from the laser beam emission opening of the laser irradiator to the horizontal line laser beam, Calculating the irradiation angle of the horizontal line laser beam with respect to the vertical direction of the laser irradiation device in a vertical virtual plane containing the center line laser beam,
irradiating the ceiling surface with the horizontal line laser beam by adjusting the emission angle of the laser beam of the laser irradiator to the irradiation angle;
A ceiling marking method featuring:

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