JP3353791B2 - Horizontal reference beam forming and surveying machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal reference light beam forming and surveying machine for projecting a diffused light emitted from a light source as a parallel light beam in a horizontal direction to form a horizontal reference plane.

[0002]

2. Description of the Related Art Conventionally, for example, as shown in FIG. 5, a light source 1 for emitting diffused light, a collimator lens 2 for converting the diffused light emitted from the light source 1 into parallel light, and an emitted light in parallel light flux There is a horizontal reference beam forming and measuring machine such as a laser surveying machine having a conical reflective optical member 3 that projects the horizontal direction in all directions of 360 degrees to form a horizontal reference plane.

The laser light source 1 and the collimator lens 2 are fixed to a main body (not shown), and the reflection optical member 3 is attached to the main body via a spring member (not shown).

[0006] As shown in FIG. 6, when the main body is inclined by θ due to the inclination of the installation surface or the like, the reflecting optical member 3 is inclined by (θ) θ. Irrespective of the inclination, the laser light is always projected in the horizontal direction to form a horizontal reference plane.

[0005]

However, in such a horizontal reference beam forming and surveying machine, when the main body is tilted by .theta., The reflecting optical member 3 must be accurately tilted by (1/2) .theta .. However, such a configuration using a spring member requires a high level of technology, and thus it is difficult to form an accurate horizontal reference plane.

In addition, since the inclination of the reflecting optical member 3 is (1/2) θ with respect to the inclination θ of the main body, the laser light source 1
Also, there is a problem that the positional relationship between the center of the lens and the reflecting optical member 3 is shifted.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to form a horizontal reference light beam forming apparatus capable of forming an accurate horizontal reference plane by eliminating a parallel error while having a simple structure. To provide a surveying machine.

[0008]

In order to achieve the above object, the present invention provides a light source and a reflecting optical member for reflecting a light beam emitted from the light source as a parallel light beam in a horizontal direction to form a horizontal reference. A light source unit provided, one end of which is supported on the main device side, and the light source unit is supported on the other end side, and the light source unit is divided into upper and lower stages so as to maintain the horizontal state of the light source unit, and directions perpendicular to each other vertically. To
And a suspension member made of a wide band-shaped conductive material.

[0009]

SUMMARY OF According to this structure, even if inclined body, upper
Divided into two lower stages and wide in the direction perpendicular to each other at the top and bottom
Since the optical unit suspended and supported by the suspending member made of a strip-shaped conductive material keeps its horizontal state, the light beam emitted from the light source is reflected as a parallel light beam by the reflection optical member.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a horizontal reference beam forming and surveying machine according to the present invention will be described below with reference to the drawings.

In FIG. 1 and FIG. 2, a horizontal reference beam forming and surveying machine 10 includes an outer cylinder 11 and an optical unit 12.

The outer cylinder 11 is provided with a cylindrical protective glass 14 fixed to the base 13, a cylindrical housing 15 provided along the upper edge of the protective glass 14, and an upper part of the housing 15. A cover body 16 having a power supply and a light source transmission circuit (both not shown) provided therein, and a semicircular support plate 17 fixed to the inside of the housing 15 near the upper side and supporting the optical unit 12
And

The optical section 12 includes a suspension member 20 and a light source unit 30 suspended on the suspension member 20.

The suspension member 20 is provided at the end face 17 a of the support plate 17.
A pair of upper mylars 21 and 22 having upper ends fixed to
A substantially cross-shaped intermediate member 23 extending in the XY directions, and a pair of lower mylars 2 having upper ends fixed to the intermediate member 23
4, 25.

The upper mylars 21 and 22 and the lower mylars 24 and 25 are each made of a strip having elasticity and a very small conductivity. In addition, each mylar 2
The conductive wires 26a, 26b, 27a,
27b, 28a and 28b are connected.

In the intermediate member 23, the lower ends of the upper mylars 21 and 22 are fixed to both projecting pieces 23a and 23b extending in the X direction, and the upper ends of the lower mylars 24 and 25 are fixed to both projecting pieces 23c and 23d extending in the Y direction. Fixed.

The light source unit 30 includes a connecting member 32 provided with a light source 31 (for example, a laser light source) for emitting diffused light and having projections 32a and 32b supported by lower ends of lower mylars 24 and 25, and a connecting member. 32, a cylindrical glass member 33 whose upper part is supported, a columnar weight member 35 fixed to the lower end of the cylindrical glass 33 via an annular fixing frame 34, and a mounting and fixed at the center of the upper surface of the weight member 35 Reflective optical member 36.

The reflection optical member 36 is formed based on the principle as shown in FIG.

In FIG. 3, reference numeral 4 denotes a parabolic mirror having a reflecting surface. The reflecting surface of the parabolic mirror 4 is
is set so as to extend along the parabola, such as a parallel light flux parallel is connecting to a point O of the optical axis 4a (e.g., y = x ^2/180 (degrees)) to a.

By rotating such a parabola by 360 degrees around an axis x 'including a point O parallel to the x-axis, a reflection optical member 36 having a substantially conical shape is formed.
The light source 3 is located at a position corresponding to the focal position O of the parabolic mirror 4.
1 (not shown in FIG. 3), this light source 31
Is reflected as parallel light in all directions of 360 degrees. At this time, when the focal length is f, the distance between the vertex P of the reflection optical member 36 and the light source 31 is set to 2f.

The connecting member 32 includes an end face 17a of the support plate 17.
Projecting portions 32a and 32b extending in XY directions (Y direction in the illustrated example) intersecting with the projections 32a are projected. Also, the connecting member 3
Balance weight members 37 and 38 extending in the X and Y directions are provided on the side wall surfaces of the two.

Next, the operation of the present invention will be described. Now, the state where the outer cylinder 11 is kept in a horizontal state, that is, the state where the axis J connecting the center of the light source 31 and the vertex of the reflection optical member 36 coincides with the vertical line (also coincides with the axis of the outer cylinder 11). When the diffused light is emitted from the light source 31, the diffused light is reflected in the 360 ° direction as parallel light in the horizontal direction by the reflection surface of the reflection optical member 36, and the parallel light is reflected in the cylindrical glass 3.
The reference horizontal surface is formed by being emitted outside the outer cylinder 11 through the protective glass 14 and the protective glass 14.

On the other hand, as shown in FIG.
Is inclined in the X-axis direction, the lower mylars 24, 25
The lower mylars 24, 25 bend due to the elasticity of the lower mylars 24, 25, and the light source unit 30 is displaced such that the entire light source unit 30 is kept horizontal.

On the other hand, as shown in FIG.
Are inclined in the Y-axis direction, the upper mylars 21 and 22
The upper mylars 21 and 22 bend due to the elasticity of the upper mylars 21 and 22, and the entire light source unit 30 is displaced by the bending of the upper mylars 21 and 22 so as to be kept horizontal.

When the outer cylinder 11 is inclined in a direction that is not parallel to the X axis or the Y axis, the entire light source unit 30 is leveled due to the combined bending of the upper mylars 21 and 22 and the lower mylars 24 and 25. It is displaced so as to be kept in a state.

As described above, regardless of the inclination of the outer cylinder 11, the axis J of the reflecting optical member 36 is always a vertical line, so that the laser beam reflected by the reflecting surface of the reflecting optical member 36 is always horizontal, and accurate. The reference horizontal plane is formed.

By the way, the reflection optical member 36 used in the horizontal reference light beam forming / measuring machine of the present invention is not limited to the above embodiment. For example, as shown in FIG. Then, the reflecting prism 36a is mounted, and after the diffused light emitted from the light source 31 is made parallel by the collimator lens 36b, the parallel light can be reflected by the reflecting surface of the reflecting prism 36a. is there.

At this time, only the portion located below the collimator lens 36b is formed of the cylindrical glass 33a, and the portion located above the collimator lens 36b is formed of a cylindrical member 33b of resin, metal, or the like. May support the collimator lens 36b. In FIG. 4, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

[0029]

[Effect] The present invention, As described above, it is possible to form an accurate horizontal reference plane to eliminate the occurrence of parallel errors, yet simple structure.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part showing a horizontal reference light beam forming / measuring machine of the present invention.

FIGS. 2A and 2B show the operation of the horizontal reference luminous flux forming / measuring machine of the present invention, wherein FIG. 2A is a longitudinal sectional view of a main part in a state where the main body device is inclined in the X-axis direction, and FIG. It is a longitudinal cross-sectional view of the principal part in the state where.

FIG. 3 is an explanatory diagram illustrating a relationship in which a parallel light beam incident on a parabolic mirror in parallel with an optical axis forms an image at a focal point of the mirror;

FIG. 4 is a longitudinal sectional view of a main part showing a second embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a schematic configuration of a conventional horizontal reference beam forming and measuring machine.

FIG. 6 is an explanatory view showing an operation of the reflection optical member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Outer cylinder (main apparatus) 20 ... Suspension member 30 ... Light source unit 31 ... Light source 36 ... Reflection optical member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G01C 15/00

Claims (1)

(57) [Claims] 1. A light source unit comprising: a light source; a reflecting optical member configured to reflect a light beam emitted from the light source as a parallel light beam in a horizontal direction to form a horizontal reference; The light source unit is supported at the other end, and is divided into upper and lower stages so as to maintain the horizontal state of the light source unit, and is vertically
A horizontal reference beam forming and surveying machine, comprising: a band-shaped suspending member made of a conductive material that is wide in an intersecting direction .