JPH0422943Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a marking laser device that projects a laser beam onto a ceiling or the like and is used mainly for marking work in construction.

(Conventional technology) Conventionally, this type of laser device for marking out
For example, there is a spot laser device developed by the applicant and disclosed in Utility Application No. 184053/1983.

That is, this conventional spot laser device has a laser tube configured to be able to project a laser beam vertically upward and downward, and a half mirror 18a that can transmit the upward laser beam vertically and reflect it laterally. are provided as shown in FIG. When using it, the spot of the downward laser beam is projected onto a predetermined background marked on the floor, and about half of the vertically upward laser beam is projected onto the half mirror 18.
It passes through a and is projected onto the ceiling as a spot,
The remaining half of the laser beam is reflected by the half mirror 18a in the direction of arrow A and is spot-projected onto the wall surface, so that vertical marking and horizontal marking can be performed simultaneously.

(Problems to be Solved by the Invention) However, in the conventional spot laser device described above, the half mirror 18a is simply disposed in the passage path of the laser beam projected from the laser tube. The vertically upward and horizontal laser beams projected through the half mirror 18a can only be spot-projected onto the ceiling and walls. The problem was that spot projection was required at several locations, making the work extremely complicated.

Therefore, the present invention was made to solve the above-mentioned conventional problems, and its purpose is to make it possible to project a laser beam across the ceiling and wall surfaces, so that it can be easily and quickly projected vertically and An object of the present invention is to provide a laser device for marking out which has excellent workability and can perform horizontal marking work at the same time, and which can also draw out the so-called center.

(Means for Solving the Problem) That is, in order to achieve the above object, in the marking laser device according to the present invention, one cylindrical lens 20 is arranged horizontally, and the other cylindrical lens 20 is arranged horizontally. The cylindrical lens 21 is brought into contact in a T-shape, and the corresponding contact portion is disposed in the passage of the laser beam transmitted in the vertical direction, and in the same direction as the one cylindrical lens 20 and in the half mirror 18. The gist of the configuration is that a cylindrical lens 25 is disposed in the path through which the laser beam reflected laterally at the cylindrical lens 25 passes.

(Function) Therefore, since the laser device for marking is configured as described above, for example, when the laser device for marking is used in a space surrounded by a hexagonal plane, the laser beam transmitted in the vertical direction is It enters one cylindrical lens 20 and is dispersed, and a projection line is projected from the top surface to one side surface, and a projection line that intersects the projection line at right angles hits the one cylindrical lens 20 in a T-shape. The other cylindrical lens 21 that is in contact with the light is dispersedly projected onto the upper surface, so that a cross-shaped line is projected onto the upper surface.

On the other hand, the laser beam reflected in the horizontal direction is dispersed by the cylindrical lens 25 to project a projection line extending from the lower surface to the one side surface, which is in line with the projection line projected by the cylindrical lens 20 from the upper surface to the one side surface. It will match.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 indicates a so-called helium gas laser type 1 mmW linear deflection type laser tube disposed within a cylindrical protective tube 2 made of aluminum.
3 is a cylindrical windshield in which the protection tube 2 is installed;
A polygonal head 4 is attached to this upper end. Reference numeral 5 denotes a gyroscope connected to the upper part of the protection tube 2 and provided in the head 4, and is configured to automatically vertically adjust the protection tube 2. Reference numeral 6 indicates a cylindrical stopper tube that is externally fitted on the lower end of the windshield 3 so as to be able to rise and fall freely, and the stopper has a hole 6a in its inner periphery through which the lower end of the laser tube 1 can be inserted. Plate 7 is installed horizontally.

In FIG. 2A, 8 is a lens barrel body screwed onto the upper part of the protective tube 2, and has a focus adjustment mechanism (not shown). Reference numeral 9 denotes a light emitting pair screwed onto the upper part of the lens barrel main body 8, and the light emitting pair 9 has a flange 11 having a screw threaded on its outer circumferential surface and a hole 10 provided approximately in the center.
A cylindrical body 12 is bored in the cylindrical body 12, and a flat portion 13 having a vertical groove 14 is formed on one side of the cylindrical body 12.

Reference numeral 15 denotes a half mirror mounting body having a through hole 16 bored in the center and a hole 17 communicating with the through hole 16 provided on the back side.
The half mirror mount is fitted into the cylindrical body 12 of the light emitter 9 so as to match the position of the concave groove 14, and the upper surface of the half mirror mount is inclined at 45 degrees from the rear side. Reference numeral 18 denotes a half mirror having a generally square front face with aluminum vapor deposition applied to one side of a glass plate, and is mounted on the upper surface of the half mirror mounting body 15 with this one side facing downward so as to close the through hole 16. It is configured to transmit about half of the laser beam incident vertically upward, and to reflect the remaining laser beam.

In the figures A, B, and C, reference numeral 19 denotes a disk-shaped attachment member attached to the upper surface of the flange 9 with a screw (not shown), and a cylindrical lens 20, 21 is horizontally arranged in a T-shape and attached so as to abut at an upper position of a hole 22 formed in the approximate center of the attachment member 19.
23 is a screw (not shown) attached to the flat part 13 of the projector 9.
The half mirror 18 is a plate-shaped body which is attached with a hole 24 substantially in the center thereof, through which the laser beam reflected by the half mirror 18 passes. 25 is plate-shaped body 2
A cylindrical lens attached in the same direction as the one cylindrical lens 20 so as to cross the hole 24 of No. 3, and a stopper (not shown)
It will be installed at.

In FIG. 1, reference numeral 26 denotes an openable and closable tripod attached to the lower surface of the head 4 with a fixing screw, and an adjusting screw 27 is screwed onto the lower end of the tripod. 28 is windshield 3
29 is a switch attached to the lower surface of the head 4; 30 is a switch 29; via laser tube 1
and a power cord for supplying current to the gyro 5.

The laser device for marking according to the present embodiment has the above-described configuration, but for example, when marking a ceiling and a wall surface from a ground marking on a floor surface, it is used in the following manner.

First, the switch 29 of the marking laser device is turned on to project a laser beam from the upper and lower ends of the laser tube 1. In this case, the protection tube 2 inside the laser tube 1 is automatically vertically adjusted by the rotation of the gyro 5, so that the laser beam projected from the lower end of the laser tube 1 travels straight vertically downward, as shown in FIG. Then, the spot is projected onto the floor surface 31. The position of the marking laser device is accurately set so that the spot 32 projected in this way matches the background marking 33 on the floor surface 31.

On the other hand, the laser beam projected from the upper end of the laser tube 1 passes through the lens barrel 8 and enters the half mirror 18 as shown by the arrow shown in FIG. The light enters the lenses 20 and 21, is dispersed in the circumferential direction by one cylindrical lens 20 as shown in FIG. A projection line 37 that intersects the projection line 36 at right angles is projected onto the ceiling 34. By marking such intersections, vertical markings on the ceiling 34 can be performed.

The remaining approximately half of the laser beam is reflected by 90 degrees from the lower surface of the half mirror 18 and enters the cylindrical lens 25 of the mounting member 23, thereby dispersing the laser beam and moving it from the floor 31 to one wall 35.
A projection line 38 is projected from the ceiling 34 to one wall surface 35 via the cylindrical lens 20.
The projected line 36 is connected to the projected line 36 and projected onto the wall surface 35 etc. as a single line. Marks are placed on such projection lines 36, 38,
This makes it possible to create horizontal markings and so-called center lines from the floor to the walls and ceiling.

That is, using the ground marking 33 on the floor 31 as a reference, vertical marking on the ceiling 34 and horizontal marking on one wall surface 35 and the floor surface 31 can be performed at the same time by one projection. Work efficiency will be significantly improved.

In the above embodiment, the half mirror 18 is
Although it is inclined at 45°, the angle of inclination is not limited to this. In short, the laser tube 1 may be arranged at a predetermined angle so that the laser beam projected from the upper end of the laser tube 1 can be reflected laterally with respect to the upward vertical direction.

Furthermore, the half mirror 18 is not limited to one that transmits and reflects the laser beam in approximately equal amounts as in the above embodiment, and its structure is not limited to one in which aluminum is vapor-deposited on a glass plate.

In addition, the lens barrel body 8, the projector 9, the plate-shaped body 19,
The specific structure of the mounting member 23, such as its shape, can be changed as desired within the scope of the present invention.

(Effect of the invention) As described above, in the present invention, one cylindrical lens arranged horizontally is brought into contact with the other cylindrical lens in a T-shape, and the corresponding part is where the laser beam transmitted in the vertical direction passes. Since the laser beam is placed in the contact area of the cylindrical lens, one of the cylindrical lenses projects a projection line extending from the top surface to the side surface, and the laser beam that enters the other cylindrical lens is projected by the cylindrical lens. A projection line that crosses the projection line of one cylindrical lens is projected, making it possible to mark out in the vertical direction.

Further, since a cylindrical lens is disposed in the same direction as the one cylindrical lens in the passage of the laser beam reflected in the lateral direction, the projection line extending from the bottom surface to one side is set by the cylindrical lens. This coincides with the projection line of one cylindrical lens on a straight line. This allows for easy horizontal marking and so-called centering.

Therefore, vertical and horizontal markings can be performed simultaneously with such an extremely simple one-time projection operation, which significantly improves work efficiency compared to the conventional method, and also allows for marking from the floor to the wall to the ceiling. Since the projection line is projected, a particularly remarkable effect has been achieved in that the center line can be easily drawn.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention,
Figure 1 is a front view of the marking laser device, Figure 2 A is a front view of the main parts of the marking laser equipment, Figure 2B is a plan view of the main parts of the marking laser equipment, and Figure 2C is the marking FIG. 3 is an explanatory view showing the state of use; FIG. FIG. 4 is a front view of the main parts of a conventional marking laser device. 1... Laser tube, 18... Half mirror, 2
0... Cylindrical lens, 21... Cylindrical lens, 25... Cylindrical lens.

Claims (1)

[Scope of utility model registration request] In a marking laser device, a half mirror 18 that can transmit an upward laser beam vertically projected from a laser tube 1 in the vertical direction and reflect it laterally is provided in the passage path of the laser beam, on the one hand. The cylindrical lens 20 is arranged horizontally, and the cylindrical lens 2
0, the other cylindrical lens 21 is T
The two cylindrical lenses 20 are brought into contact with each other in the shape of a letter, and the corresponding contact portion is disposed in the passage path of the laser beam transmitted in the vertical direction, and the one cylindrical lens 20
A laser device for marking out is characterized in that a cylindrical lens 25 is disposed in the passage of the laser beam reflected laterally by the half mirror 18 in the same direction as the half mirror 18.