JP2507039Y2 - Horizontal setting device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a horizontal plane setting device for rotating and emitting light in a horizontal direction to set a horizontal plane.

[Prior art]

As a horizontal plane setting device of this type, as shown in FIG. 7, a pendulum type light source 3 is provided below a collimator lens 2 supported by a frame 1, and is driven by a motor 4 above the collimator lens 2. In the structure in which the penta prism 5 is arranged, the light emitted upward from the light source 3 is collimated by the collimator lens 2 and is horizontally emitted by the penta prism 5 to form a horizontal plane. The pentaprism 5 is mounted on a rotating body 8 which is rotationally driven by a motor 4, and at a position surrounding the rotating body 8, a relative rotating portion between the rotating body 8 and a fixed portion is protected from rain and dust. For this purpose, a transparent transparent dustproof and waterproof cover 9 is provided.
If the dustproof / waterproof cover 9 has a cylindrical shape, the cover 9 acts as a diffusing lens, and the light transmitted through the cover is diffused in the horizontal direction. For this reason, the light quantity in the light receiving side of the horizontal setting device that receives the rotationally emitted light at a long distance is insufficient and the light is not used, and the cover 9 is of a rectangular shape in which the transmitted light is not diffused. Reference numeral 6 (6a, 6b) is a wedge lens for adjusting the optical axis in the vertical direction, and reference numeral 7 is a wedge lens for adjusting the optical axis in the horizontal direction.

[Problems to be solved by the device]

As described above, the dustproof / waterproof cover 9 used in the conventional horizontal plane setting device is a box type, and in order to make this cover 9, it is necessary to bond parallel flat glass to be integrated, which is high in cost. As a result, there is the first problem that the cost of the horizontal plane setting device is high.

Further, the above-mentioned conventional horizontal plane setting device has a second problem that it cannot be made compact due to the following factors.

That is, the pendulum type light source has a structure in which the light source 3 is arranged at the focal position of the collimator lens 2 and the pendulum body 3a, which is a light source carrier, is suspended by a plurality of (generally three) suspension lines 3b. When is tilted, the light source 3 moves vertically below the collimator lens 2 together with the pendulum body 3a so as to always emit light upward in the vertical direction, which is an indispensable structure in a horizontal plane setting device. However, in this pendulum type light source, a certain length of suspension line is required to compensate vertical light, and in order to form parallel light, the light source 3 and the collimator lens 2 are separated by the focal length of the collimator lens 2. Therefore, the vertical height H of the pendulum structure needs to be large to some extent, and this vertical height H has been a factor that makes it difficult to make the horizontal plane setting device compact.

Further, a wedge lens 6 (6
a, 6b), the pentaprism 5, and the motor 4 are also necessary as a horizontal plane setting device, and if these are sequentially arranged in the vertical direction, the size is inevitably increased and it is difficult to make the device compact.

The present invention has been made in view of the above problems of the prior art. A first object of the present invention is to provide a cost-effective horizontal plane setting device, and a second object thereof is to provide a compact horizontal plane setting device. Especially.

[Means for solving the problem]

In order to achieve the first object, in the horizontal plane setting device according to claim (1), a light source that is suspended and supported by a suspension line and emits light in the vertical direction, and is provided above the light source, A collimator lens that collimates the light emitted from the light source, and an optical path changing element that is provided above the collimator lens and that changes the optical path in the horizontal direction and that rotates around the vertical optical axis to form a horizontal irradiation surface. In a horizontal plane setting device provided, a cylindrical optical element having a vertical optical axis as a center is provided in a fixed state around the optical path changing element, and a cylindrical optical element is provided between the optical path changing element and the cylindrical optical element. A condenser lens for canceling the diffusion of light is provided so as to rotate integrally with the optical path changing element.

Further, in claim (2), the optical path changing element is suspended by a motor to be arranged at a position below an upper support point of the suspension line, and the light source is located at a position below a connection point between the suspension line and the pendulum body. It is designed to be placed in.

Further, in claim (3), the motor is supported by a plurality of columns vertically provided on a lower casing that forms a power source accommodating portion, and the collimator lens is supported by a collimator lens support that is provided upright on the lower casing. Then, the pendulum body is formed in an inverted hat shape, and the hat collar portion having the annular groove forming the damper mechanism by engaging with the annular groove formed on the lower casing side is suspended by a suspension wire. The light source is provided so as to extend horizontally while intersecting with the legs of the lens support body in a loosely fitted state, and the light source is provided in the center of the hat projecting toward the lower casing inside the lens support body.

Further, in claim (4), the internal mechanism of the horizontal plane setting device disposed on the lower casing is surrounded by a cup-shaped upper casing having an opening-side base end fixed to the lower casing. A band-shaped region facing the optical path changing element is formed by the cylindrical optical element, a wedge lens for adjusting the optical axis in the horizontal direction is provided between the cylindrical lens and the cylindrical optical element, and the collimator lens includes a fine movement screw and a spring portion. The collimator lens support is supported by a collimator lens support body so that the position can be adjusted in the horizontal direction, and the collimator lens support body is provided with an insertion hole for a screw rotation operation jig that extends through the upper casing and extends to the fine movement screw mounting portion. Is.

[Action]

According to claim (1), since the cylindrical lens cancels the diffusion of light in the left-right direction by the cylindrical optical element surrounding the optical path changing element, parallel light is emitted from the horizontal plane setting device and is sufficiently separated from the horizontal plane setting device. Light can be received even by a light receiver arranged at a position. Further, the cylindrical optical element is easier to manufacture than the conventional box-shaped cover.

In claim (2), the optical path changing element above the collimator lens is suspended by the motor and is arranged below the supporting point above the suspension line of the pendulum light source, and the light source is connected to the pendulum main body of the suspension line. Since it is arranged lower, the height above the suspension point of the pendulum body of the horizontal plane setting device becomes smaller.

In claim (3), the intersecting arrangement of the pendulum body and the lens support leg portion in the loosely fitted state enables the pendulum body to swing.
The inverted hat type pendulum body enables to secure an appropriate distance (focal length of the collimator lens) between the collimator lens and the light source. Further, the annular groove on the pendulum body side and the annular groove on the lower casing side engage with each other to form a damper mechanism in which the vertical height of the engaging portion is small but the entire surface area of the engaging portion is large.

According to claim (4), the fine movement screw can be rotated by inserting the jig for screw rotation operation through the screw rotation operation jig insertion hole, and the position of the collimator lens can be horizontally adjusted from the outside of the upper casing. . Further, the wedge lens can be rotated so that the optical axis in the horizontal direction, that is, the plane formed by the rotationally emitted light becomes horizontal.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

1 to 5 show an embodiment of a horizontal plane setting device according to the present invention. FIGS. 1 and 2 are vertical cross-sectional views of the horizontal plane setting device at different positions, and FIG. 2 is a sectional view taken along line III-III shown in FIG. 2, and FIG. 4 is line IV-IV shown in FIG.
5 is a sectional view taken along line V-V shown in FIG.

In these drawings, reference numeral 10 is a horizontal plane setting device body carried on a leveling table 12, and a lower casing 11 in which a lower battery housing chamber 14 and an upper printed board housing chamber 15 are formed.
And the lens support 18 which is erected on the lower casing 11.
A motor 34 supported via a pillar 19 vertically provided on the lower casing 11, a penta prism 32 suspended by the motor 34, and a suspension from an upper frame 30 supported by the pillar 19. The pendulum type light source 40 and the upper casing 50 that covers each of these devices are assembled into a single structure.

The bottom surface of the battery housing chamber 14 of the lower casing 11 is
It is composed of a parallel surface plate 12a. And body 10
The parallel platen 12a and the parallel surface plate 12a are fastened and integrated by a single fastening screw 13, and the fastening screw 13 separates the leveling table 12 from the main body 10 to open the battery accommodating chamber 14 so that the battery can be replaced. It is convenient for Reference numeral B denotes a battery housed in the battery housing chamber 14. Further, the leveling screw 12b of the leveling table is provided outside the lower casing 11, and the separation distance between the parallel surface plate 12a and the lower plate 12c is made smaller than that of the conventional leveling table. A printed board housing chamber 15 is defined by a floor plate 16 above the lower casing 11, and a printed board 17 for controlling the drive of the horizontal plane setting device is housed in the board housing chamber 15.

A ring-shaped upper frame 30 is connected to the upper ends of the columns 19 suspended from the floor plate 16, and a pendulum main body 43 provided with a light source is suspended by three suspension wires 42 on the upper frame 30 to form a pendulum type. A light source 40 is configured. Pendulum body 43
Has an inverted hat-shaped disk shape with a central portion protruding downward, and extends in the entire area of the floor plate 16 while intersecting with the support column 19 in a loosely fitted state.
The pillar 19 is formed on the hat collar portion 43a ₁ of the pendulum body,
It passes through the column insertion hole 44a that is larger than the column diameter.
The 9 prevents the swinging of the pendulum body 43 from being hindered. The hat central portion 43a ₂ of the pendulum body 43 projects downward inside the lens strut body 18.
A laser diode 45, which is a light source, is provided on the bottom surface of 43a ₂ . Even if the horizontal plane setter main body 10 is in an inclined state, the pendulum main body 43 oscillates so that the light emitted from the laser diode 45 is always vertically upward. Concentric concavo-convex 43 on the bottom surface of the collar 43a ₁ of the hat of the pendulum body 43.
An annular groove is formed by b and 43c, and the thin disk-shaped air damper is configured by engaging with the annular groove formed by the concentric concavo-convex portions 16b and 16c formed on the upper surface of the floor plate 16 ( (See FIGS. 2 and 5). In addition, a current is flowing between the unevenness 43b, 43c on the pendulum body side and the unevenness 16b, 16c on the floor board side, and due to the change in the capacitance due to the swing of the pendulum body 43, the swing of the pendulum body 43 is within the allowable range. Motor 34 if exceeded
The drive of is stopped.

In the lower casing 11, a cylindrical lens support 18 is erected so as to intersect with the pendulum body 43 in a loosely fitted state, and the collimator lens 20 in the lens support 18 is arranged directly above the laser diode 45. There is. The lens support 18 has a shape in which three legs 18b extend from an upper cylinder 18a that houses the collimator lens 20, the leg 18b penetrates a leg insertion hole 44b formed in the pendulum body 43, and the hole 44b is a pendulum. It has a size that does not hinder the swinging of the main body 43 (see FIG. 5). As shown in FIG. 3, in the collimator lens 20, the lens body 21 surrounded by the lens frame 22 is provided in the lens holder 23 so as to penetrate the bracelet-shaped leaf spring 24 and the leaf spring 24. It is supported by two adjusting screws 25a and 25b.
The leaf spring 24 is formed with bent inner protrusions 24a and 24b that face the adjustment screws 25a and 25b arranged orthogonally and bias the lens frame 22 in the radial direction. Therefore, the collimator lens 20 is supported at four points, and the center of the collimator lens 20 can be horizontally adjusted by the adjusting screws 25a and 25b. That is, the optical axis L ₁ in the vertical direction can be adjusted according to the position of the penta prism 32 by the adjusting screws 25a and 25b. Reference numeral 26 is a driver insertion opening, which is opened to the outside of the upper casing 50 to be described later, and adjusts the optical axis L ₁ from the outside through the driver insertion opening 26 without removing the upper casing 50 to expose the internal mechanism. Is possible.

Further, a focus adjusting screw 28 is provided which penetrates the long hole 27 (see FIG. 1) of the lens support 18 and is screwed into the lens holder 23. Further, the bearings of the adjusting screws 25a and 25b are inserted. Since the apertures 18a and 18b (see FIG. 3) on the side of the lens support 18 which is present are sufficiently larger than the adjustment screw support portion, the focus adjustment screw 28 is loosened and the lens holder 23 is slid vertically to perform focus adjustment. It is like this. The position of the lens holder 23 is adjusted in advance so that the distance between the collimator lens 20 and the laser diode 45 substantially matches the focal length of the collimator lens 20.

The ring-shaped upper frame 30 has a penta prism 32.
A brushless motor 34 for driving prism rotation is suspended. The pentaprism 32 is an optical path changing prism that changes the direction of vertically incident light into a horizontal direction.The pentaprism 32 is suspended by a prism holding frame 33 on the side of the rotor 34b facing the stator 34a of the motor 34, and above the collimator lens 20. It is designed to rotate horizontally around the vertical axis L ₁ at a constant speed. Reference numeral 34c is a bend ring unit. A wedge lens 36 supported by the prism holding frame 33 is arranged on the light emitting surface side of the pentaprism 32, and adjusts the blurring of the optical axis L _{2 in} the horizontal direction. A cover 38 that completely covers the motor 34 and the pentaprism 32 from above is fixed to the central upper end portion of the motor 34, and an opening 39 is formed at a position of the cover 38 corresponding to the pentaprism light emitting surface.

Further, an upper casing 50 integrally formed with a handle 52 at the upper end is attached to the lower casing 11 by screw fastening so as to completely cover the internal mechanism of the horizontal plane setting device main body. Reference numeral 51 in FIG. 1 is a fastening screw, and by removing the screw 51, the upper casing 50 can be easily removed to expose the internal mechanism of the horizontal plane setter main body 10, which is convenient for repair and the like. Penta prism in upper casing 50
A window 54 made of a cylindrical transparent glass, which is a cylindrical optical element, is formed in a region surrounding the 32, and light emitted from the pentaprism 32 is transmitted through the window 54 and is rotatably irradiated. Further, a cylindrical lens 56 is arranged on the light emitting surface of the pentaprism 32 to cancel the diffusion of the light transmitted through the window 54 in the left-right direction.

The region 19a of the pillar 19 which intersects the light emitted from the pentaprism 32 has a thin cross section with both sides cut off as shown in FIG. The pillars 19 are arranged so as to coincide with each other so that the light emitted from the pentaprism 32 is not obstructed as much as possible.

The suspension wire 42 for suspending the pendulum body 43 is a ring-shaped protective pipe 60 suspended from the frame 30 (Fig. 6 (a),
(See (b)). This protective pipe 60
The suspension line 42 from vibration or shock when transporting the horizontal level setting device.
Or to prevent the suspension line from being deformed or damaged by accidentally touching the suspension line during the adjustment work of the internal mechanism of the horizontal plane setting device. That is, the suspension wire 42 is sandwiched by the sandwiching members 62, 63 which are fitted to the ring-shaped upper frame 30 and the pendulum body 43 and integrated by screw fastening,
It is pressed and fixed by a screw 64. The lower or upper protruding portions 62a, 63a of the holding members 62, 63 are circular pipe-shaped, and the lower protruding portion 62a of the upper holding member is aligned with the inner diameter of the protection pipe 60. On the other hand, the upper protruding portion 63a of the lower holding member 63 has an outer diameter that matches the inner diameter of the protective pipe 60 on the proximal end side, but has a smaller diameter than the inner diameter of the protective pipe 60 at the upper end portion 63a ₁ . That is, a gap is formed between the protection pipe 60 and the upper end portion 63a _{1 of the} holding member so that the swing of the pendulum body 43 is not hindered (interference with the suspension wire 42).

When the horizontal plane setting device is installed and used, as shown in FIG. 6 (a), the upper end portion of the protective pipe 60 is fixed by screws with the protective pipe 60 being the uppermost position. At this time, the lower end portion of the protection pipe is in a state of being separated from the upper end portion 63a ₁ of the upper protruding portion of the lower holding member 63, so that the swinging of the pendulum body 43, that is, the compensating function of making the emitted light the vertical direction is not hindered. When transporting the horizontal setting device or adjusting the internal mechanism, screw the upper and lower ends of the protective pipe 60 with the protective pipe 60 at the lowermost position as shown in Fig. 6 (b). To do. As a result, the upper frame 30 and the pendulum body 43 are fixed by the protective pipe 60, so that stress is not concentrated on the suspension line 42 in the protective pipe 60 during transportation of the horizontal plane setting device, and mistakes are made when adjusting the internal mechanism. The suspension wire 42 is protected without the risk of damaging the suspension wire with a screwdriver or the like.

In the above-mentioned embodiment, the horizontal plane setting device having the structure in which the pentaprism is suspended by the motor has been described.
The present invention can be applied to the horizontal plane setting device having the conventional structure shown in the figure. That is, a cylindrical cover may be used instead of the box-shaped cover 9, and a cylindrical lens for converging transmitted light in the left-right direction may be arranged on the light exit surface of the pentaprism 5.

[Effect of device]

As is clear from the above description, in claim (1), since the cylindrical lens cancels the diffusion of light in the left and right directions by the cylindrical optical element surrounding the optical path changing element, parallel light is emitted from the horizontal plane setting device. Therefore, it is possible to receive light even with a photoreceiver placed at a position far from the horizontal plane setting device.
It can be used in the same distance range as the horizontal plane setting device of the conventional structure. Furthermore, the cylindrical optical element is easier to manufacture than the conventional box-shaped cover, so that the cost of the horizontal plane setting device is low.

Further, in claim (2), the pentaprism above the collimator lens is suspended by the motor and is arranged below the supporting point above the suspension line of the pendulum type light source, and the light source is connected to the pendulum body of the suspension line. Since I placed it lower,
The height above the pendulum main body suspension point of the horizontal plane setting device is small, and therefore the vertical height of the horizontal plane setting device can be made compact.

In claim (3), the intersecting arrangement of the pendulum body in a loosely fitted state with the lens support leg portion allows the pendulum body to swing, and the inverted hat type pendulum body has an appropriate distance between the collimator lens and the light source. (Focal length of collimator lens)
And a pendulum type light source structure for compensating light emitted from the light source in the vertical direction can be configured, and the height above the pendulum main body suspension point of the horizontal plane setting device can be made compact. Further, on the lower surface of the pendulum body, a damper mechanism having a small vertical height but a large surface area of the entire engaging portion, that is, having an excellent air damper action is provided.

According to claim (4), the inclination of the horizontal plane formed by the rotary output light can be adjusted by rotating the wedge lens, and the lens center of the collimator lens and the optical axis can be aligned by using the fine movement screw. Particularly, the position adjustment of the collimator lens can be performed without removing the upper casing, which is very convenient.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a horizontal plane setting device which is an embodiment of the present invention, FIG. 2 is a vertical sectional view of the horizontal plane setting device at different positions, and FIG. 3 is a line III-III shown in FIG. 4 is a sectional view taken along line IV-IV shown in FIG. 1, FIG. 5 is a sectional view taken along line VV shown in FIG. 1, FIG. 6 (a),
(B) is a cross-sectional view illustrating a usage state of the suspension wire protection pipe, and FIG. 7 is a vertical cross-sectional view of a conventional horizontal plane setting device. 10 …… Horizontal plane setter main body, 11 …… Lower casing, 18…
… Lens support, 18b …… Leg of lens support, 19 …… Post, 20 …… Collimator lens, 24 …… Spring member leaf spring, 25a, 25b …… Fine adjustment screw (adjustment screw), 32 …… Penta prism, which is an optical path changing element, 34 …… Penta prism rotation drive motor, 36 …… Wedge lens for horizontal optical axis adjustment, 40 …… Pendulum type light source, 42 …… Suspension wire, 43 …… Inverted hat type Pendulum body, 43a ₁ ... hat collar, 43a ₂ ... hat center, 16b, 16c, 43b, 43c ... annular groove (uneven) forming air damper, 44b ... through hole, 45 ... with light source A certain laser diode, 50 ... upper casing, 54 ... window made of band-shaped transparent glass which is a cylindrical optical element, 56 ... cylindrical lens, 60 ... suspension line protection pipe, L ₁ ... vertical optical axis, L ₂ ... Horizontal optical axis.

Claims (4)

(57) [Scope of utility model registration request] 1. A light source which is suspended and supported by a suspension wire and emits light vertically upward, a collimator lens which is provided above the light source and collimates the light emitted from the light source into parallel light, and a collimator lens which is provided above the collimator lens. In the horizontal plane setting device provided with an optical path changing element that changes the optical path in the horizontal direction and rotates around a vertical optical axis to form a horizontal irradiation surface, a vertical optical axis is provided around the optical path changing element. A cylindrical optical element as a center is provided in a fixed state, and a cylindrical lens for canceling the diffusion of light by the cylindrical optical element between the optical path changing element and the cylindrical optical element rotates integrally with the optical path changing element. A horizontal plane setting device, which is provided in the. 2. The optical path changing element is suspended from a motor,
The horizontal plane setting device according to claim 1, wherein the light source is arranged below an upper support point of the suspension line and below the connection point between the suspension line and the pendulum body. 3. The motor is supported by a plurality of columns vertically provided on a lower casing forming a power source accommodating portion, and the collimator lens is supported by a collimator lens support body provided upright on the lower casing, The pendulum body is formed in an inverted hat shape, and a hat collar portion having an annular groove that forms a damper mechanism by engaging with an annular groove formed on the lower casing side is suspended by a suspension line to support a lens. Extends horizontally with the legs of the body intersecting loosely,
The horizontal light level setting device according to claim (2), wherein the light source is provided in a central portion of the hat projecting toward the lower casing inside the lens support. 4. The internal mechanism of the horizontal plane setting device arranged on the lower casing is surrounded by a cup-shaped upper casing whose opening-side base end is fixed to the lower casing, and which is used as an optical path changing element of the upper casing. The facing band-shaped region is formed by the cylindrical optical element, a wedge lens for adjusting the optical axis in the horizontal direction is provided between the cylindrical lens and the cylindrical optical element, and the collimator lens is a collimator with a fine movement screw and a spring member. The collimator lens support body is supported in the lens support body such that the position thereof can be adjusted in the horizontal direction, and the collimator lens support body is provided with an insertion hole for a screw rotation operation jig that extends through the upper casing and extends to the fine movement screw mounting portion. The horizontal plane setting device according to claim 3, characterized in that