JP3767464B2 - Laser level - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a level for measuring the level of a floor surface or the verticality of a column or wall surface in construction or inspection of a building such as a house, and in particular, a laser beam in a horizontal or vertical direction from the level body. Is output to irradiate a floor mark, a wall surface, or a ceiling surface with a laser beam spot mark or ink marking line.
[0002]
[Prior art]
A level or the vertical state is measured by visually observing the position of the bubble enclosed in the curved glass tube. Alternatively, there is known a laser level in which a laser beam irradiating unit for irradiating a ceiling mark or the like with a spot mark or horizontal and vertical marking lines is known. The laser beam irradiating unit includes a laser module that emits a laser beam, a reflecting mirror and a semi-transparent mirror that are set at angles of 45 degrees, 90 degrees, and 180 degrees that split the laser beam in a vertical or horizontal direction, and a laser module. The laser beam irradiating part is supported by a frame accommodated in an accommodating part formed inside the level body.
[0003]
A part of the laser beam emitted from the laser module is split into a vertical direction or a horizontal side surface direction and a horizontal direction of a longitudinal level of the level through a semi-transparent mirror, respectively. Irradiation is performed as a line or a vertical line. In order to adjust the optical axis of the laser beam emitted from the laser module with respect to the mounting angle of the transflective mirror or the reflecting mirror, the carrier holding the laser module is adjusted by tightening three screws with respect to the frame. The laser optical axis is adjusted so as to be at an angle of 45 degrees or 90 degrees with respect to the semi-transmissive mirror or the reflecting mirror so that the laser beam is irradiated in a horizontal or vertical direction with respect to the frame.
[0004]
[Problems to be solved by the invention]
As described above, even if the mounting state between the laser module and the frame is adjusted to adjust the optical axis of the laser beam, the mounting angle of the frame with respect to the level body is inclined with respect to the reference plane of the level Even if the carrier installation angle is adjusted accurately with respect to the set angle of the semi-transmission mirror, etc., the laser is emitted from the level body and is split and emitted in the opposite direction via the semi-transmission mirror The light is not horizontal or vertical with respect to the reference surface of the spirit level body, and even if the horizontal line in one direction is adjusted horizontally by adjusting the mounting angle of the laser module, the line in the opposite direction is horizontal. In addition, a deviation in the height direction occurs at a position reflected by the semi-transmission mirror or the like, and a deviation in the height direction occurs at the irradiation point. Further, the horizontal laser line that irradiates the planar laser beam through the cylinder lens does not become horizontal.
[0005]
In the present invention, it is possible to adjust the inclination of the mounting state of the internal frame attached with the laser module with respect to the level body that accommodates the internal frame, so that horizontal laser light can be irradiated from the same height in the opposite direction. It is an object to do.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, a laser level according to the present invention includes a laser module that emits a laser beam and a laser beam emitted from the laser module on an internal frame that is housed in a housing part formed in the level body. In the laser level, in which a reflecting mirror and a semi-transparent mirror that radiate and radiate in an arbitrary direction by reflection and spectroscopy are arranged and held, and a laser beam is irradiated through an irradiation port formed in the level body, the internal frame The adjusting means is formed over two adjacent sides, and the adjusting means makes it possible to adjust the inclination of the inner frame with respect to the level main body.
[0007]
The adjusting means is an adjusting screw that is screwed into an adjusting screw hole that obliquely passes through two adjacent sides of the inner frame, and the tip of the adjusting means is brought into contact with the inner wall of the housing portion of the spirit level body. It is preferable that the inner frame can be tilt-adjusted with respect to the spirit level main body by contacting.
[0008]
【The invention's effect】
According to the present invention, the inclination of the housing state of the inner frame in the main body housing portion can be adjusted, so that the irradiation direction of the laser beam is set to a horizontal or vertical state with the inner frame being housed in the level body. Can be adjusted. Therefore, the optical axis adjustment with respect to the inner frame of the laser module can be performed before the inner frame is assembled to the main body, and the mounting adjustment with high accuracy is possible with respect to the mounting angle of the semi-transmissive mirror and the reflecting mirror. By adjusting the inclination of the inner frame in the housing portion, it is possible to adjust so that two horizontal laser beams irradiated in the longitudinal direction of the main body are irradiated horizontally from the same height. By adjusting means formed on two adjacent sides of the inner frame, it is possible to adjust the inclination of the inner frame with respect to the level body.
[0009]
In addition, by comprising an adjustment screw with an adjustment screw, it can operate from the end surface of the side which attaches a cover in the state which accommodated the internal frame in the accommodating part. Further, the angle can be finely adjusted by adjusting the tightening amount of the adjusting screw.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below based on examples shown in the drawings. As shown in FIGS. 1 and 2, the level 1 having an outer shape formed in a substantially rectangular shape has a horizontal measuring unit 2 for measuring the horizontal state of the level 1 at the center of the upper surface. A standard type is used in which the horizontality can be visually recognized from the movement of bubbles enclosed in a curved glass tube. A vertical measuring section 3 having a transparent window formed on the side surface is formed on one end side of the level 1, and a bubble tube for vertical measurement is disposed inside the window.
[0011]
A vertical irradiation port 4 for irradiating a laser beam in the vertical direction is formed on the upper surface of the level 1, and both horizontal end surfaces of the level 1 in the horizontal direction for irradiating the laser beam in the horizontal direction. An irradiation port 5 is formed. Further, a line irradiation port 6 for outputting a planar laser line beam extending in the horizontal direction is formed on the side surface of the level 1, and the irradiation port 6 can be rotated along the side surface of the level 1. 7, the laser line beam can be rotated to an arbitrary inclination angle. Further, a power switch 8 for turning on / off the irradiation of the laser beam and a cap 9 for closing the battery housing portion serving as a driving source for emitting the laser beam are attached to the end surface on one end side.
[0012]
As shown in FIG. 2, a spirit level 1 includes a spirit level body 10 that is formed of a metal such as aluminum or stainless steel and has a rectangular cross section, a cover 11 that closes openings at both ends of the body 10, and a level. It is comprised by the internal frame 12 accommodated in the accommodating part 10a currently formed in the hollow of the container main body 10. FIG. The internal frame 12 drives a laser module 13 that emits a laser beam, a reflecting mirror 14 that splits the laser beam L emitted from the laser module 13 in a plurality of directions, a semi-transmissive mirror 15, and the laser module 13. A driving device, a battery for power supply, and the like are supported.
[0013]
On the inner frame 12, a part of the laser beam L is dispersed along the optical axis of the laser beam L emitted from the laser module 13 to obtain a horizontal laser beam L1 on the side surface side of the level body 10. The translucent mirror 15a tilted 45 degrees laterally to irradiate, the semitransparent mirror 15b tilted 45 degrees upward to irradiate the laser beam L2 in the vertical direction, and the reflecting mirror 14a tilted 45 degrees downwardly vertically. The reflected laser beam is irradiated as a horizontal laser beam L3 in both directions along the length of the level body 10, and the reflection mirror 15c inclined upward by 45 degrees and a reflection disposed at 90 degrees with respect to the optical axis. A mirror 14b is installed. A laser module 13 that emits a laser beam is held by a carrier 16, and is attached to the inner frame 12 by three adjustment screws 17 through the carrier 16.
[0014]
The laser module 13 held by the carrier 16 can adjust the inclination of the optical axis by adjusting the tightening amount of the three adjusting screws 17 (adjusting means) for attaching the carrier 16 to the inner frame 12, and the semi-transmissive mirror can be adjusted. The irradiation direction can be finely adjusted so as to be exactly 45 degrees or 90 degrees with respect to the installation angle of 15 and the reflecting mirror 14. The inner frame 12 is placed in the housing portion 10a of the level body 10 in a state where the optical axis of the laser module 13 is accurately adjusted with respect to the installation angle of the semi-transmissive mirror 15 and the reflecting mirror 14 by the adjusting screw 17. Be contained.
[0015]
The internal frame 12 is formed with an adjusting screw hole 18 that obliquely penetrates the internal frame 12 from one end surface to the lower side surface of the internal frame 12. The adjustment screw hole 18 is formed so as to be shifted from the center position of the inner frame 12 in the lateral direction so as not to block the laser beam L3 irradiated in the horizontal direction from the semi-transmission mirror 15c. ing. The adjustment screw 19 screwed into the adjustment screw hole 18 is formed with a groove engaged with a tool such as a driver at the upper end, and as shown in FIG. Is rotated by the tool T and is screwed through the adjustment screw hole 18. The tip of the adjustment screw 19 is formed in a tapered shape, protrudes from the lower side surface of the inner frame 12 and comes into contact with the lower wall of the housing portion 10a of the level body 10 to change the inclination angle of the inner frame 12. Thus, the laser beam irradiated in the longitudinal direction of the spirit level body 10 is adjusted to be parallel to the longitudinal direction of the spirit level body 10.
[0016]
The angle of the internal frame 12 is adjusted in a state in which the internal frame 12 is disposed in the accommodating portion 10a of the level body 10 at the time of assembly. The outer width dimension of the inner frame 12 and the inner width dimension of the accommodating portion 10a are as follows. Are set to the outside and inside dimensions so that they can be fitted into the housing 10a. In the state where the inner frame 12 is fitted in the accommodating portion 10a, the adjustment screw 19 protrudes from the lower side and comes into contact with the lower wall of the accommodating portion 10a, thereby adjusting the angle in the accommodating portion 10a.
[0017]
As shown in FIG. 5, the inner frame 12 is fixed to the level main body 10 with an adhesive or the like after adjusting the installation angle in the accommodating portion 10 a with the adjusting screw 19, and is arranged in the longitudinal direction of the level main body 10. Both ends are closed by a cover 11. Both covers 11 are formed with horizontal irradiation ports 5 to transmit laser beams irradiated in both longitudinal ends of the level 1. Further, a power switch 8 for turning on and off the power of a control circuit that controls light emission of the laser module 13 and a cap 9 for closing an opening for loading a battery as a power source into the internal frame 12 are attached to one cover 11. It has been.
[0018]
In the above-described embodiment, the planar laser beam irradiated from the horizontal line irradiation port 6 is configured such that the laser beam surface can be changed to an arbitrary angle, and the laser beam dispersed by the semi-transmissive mirror 15b is planar. By fixing the cylinder lens that divides the light to the dial 7 with the angle scale 21 and rotating the dial lens 7 to rotate the cylinder lens, it is possible to irradiate the laser line beam at an arbitrary angle. In accordance with the angle scale 20 formed on the peripheral edge of the dial 7 and the mark 21 formed on the spirit level body 10, an inclined line mark having an arbitrary angle, for example, 45 degrees can be irradiated on an arbitrary wall surface or the like. .
[0019]
The above embodiment discloses a configuration in which one adjustment screw 19 is disposed by forming an adjustment screw hole 18 that obliquely penetrates the inner frame 12 from one end surface to the lower side surface of the inner frame 12. The adjustment direction of the inclination of the internal frame 12 can be set to two directions by additionally forming an adjustment screw hole inclined from one end surface to the upper side surface and screwing the adjustment screw into the screw hole. According to this, it is possible to adjust the inner frame in any direction by repeating tightening and returning of the two adjusting screws.
[0020]
The adjusting means is not limited to the adjusting screw. Other means may be used.
[Brief description of the drawings]
1 is a perspective view of a laser level according to an embodiment of the present invention. FIG. 2 is a perspective view in a different direction of the same embodiment as FIG. 1. FIG. 3 is a main component of a level of the same embodiment as FIG. FIG. 4 is a cross-sectional view showing a state in which the inclination of the inner frame is adjusted. FIG. 5 is a cross-sectional view in a state where the adjustment operation is completed and the assembly is completed.
DESCRIPTION OF SYMBOLS 1 Level 2 Horizontal measuring part 3 Vertical measuring part 4 Vertical irradiation port 5 Horizontal irradiation port 6 Horizontal line irradiation port 7 Dial 8 Power switch 9 Cap 10 Level unit body 11 Cover 12 Internal frame 13 Laser module 14 Reflecting mirror 15 Transflective mirror 16 Carrier 17 Adjustment screw 18 Adjustment screw hole 19 Adjustment screw 20 Angle scale 21 Mark

Claims (2)

A laser module that emits a laser beam to an internal frame housed in a housing part formed in the level body, a reflecting mirror that reflects and divides the laser beam emitted from the laser module and irradiates it in an arbitrary direction, and a semi-transmissive In a laser level arranged to hold a mirror or the like and irradiate a laser beam through an irradiation port formed in the level body, it has adjustment means formed over two adjacent sides of the inner frame, The laser level according to claim 1, wherein the adjustment means enables the inclination of the inner frame relative to the level body. The adjusting means is an adjusting screw that is screwed into an adjusting screw hole that obliquely penetrates two adjacent sides of the inner frame, and a tip of the adjusting screw is brought into contact with the inner wall of the housing portion of the level body. The laser level according to claim 1, wherein the inner frame can be tilted with respect to the level body.

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