JP2591028Y2 - Leveling device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leveling device. More specifically, the present invention relates to a leveling device for mounting a surveying instrument and vertically correcting its attitude.

[0002]

2. Description of the Related Art In recent years, in the field of construction, labor-saving machines for solving labor problems such as a shortage of skilled workers and an aging population,
2. Description of the Related Art Automated machines that enable even unskilled workers to easily perform operations equivalent to skilled workers are being actively developed. The same applies to a surveying instrument used in such a construction field, and the demand is not limited to the use of only a surveying instrument by a specialist, and a product having a simple function that can be easily used by an inexperienced person or the like. Devices that require little knowledge of surveying instruments are becoming widespread.
As described in Japanese Utility Model Laid-Open No. 4-79209, a conventional leveling device has an inclination angle detecting means on a pedestal portion of the leveling device, and simplifies leveling work by automating a leveling function. There is something that is planned.

[0003]

However, in such a leveling device, the supporting legs for adjusting the inclination of the driving means for adjusting the inclination angle and the fulcrum legs of the connecting means are held by the holding plate. If the holding plate is made rigid, an overload is applied to the driving means, and in particular, there is a problem in that the rotation torque for rotating the tilt adjusting support legs in a low-temperature environment becomes excessively large, causing a problem in the leveling operation. On the other hand, when the rigidity of the holding plate is reduced, the rigidity of the entire leveling device is reduced,
There is a problem that it is difficult to maintain accuracy.

[0004] In view of the above problems, an object of the present invention is to provide a leveling device that is compact and has high rigidity.

[0005]

According to the present invention, there is provided a pedestal on which a surveying instrument body is mounted, a base opposed to the pedestal, and support means for supporting the pedestal with a variable inclination angle with respect to the base. In the leveling device for leveling the surveying instrument body by changing the inclination angle, the leveling device includes a blocking unit for blocking the horizontal rotation of the pedestal and the base with respect to each other, and the support units overlap each other, 2 or 2 that can be rotated horizontally
It comprises at least one wedge-shaped tilt adjusting member.

[0006] The leveling device further includes an inclination angle changing means for driving the inclination adjusting member to change the inclination angle, a control means for controlling the inclination angle changing means, and a vertical direction of the surveying instrument main body. And a tilt sensor for detecting a tilt with respect to the surveying instrument, and based on the tilt detected by the tilt sensor, changes the tilt angle to level the surveying instrument main body.

Rolling bearing members are provided between the pedestal and the tilt adjusting member, between the two or more tilt adjusting members, and between the tilt adjusting member and the base. Are preferred.

[0008] The tilt angle changing means may be any one of between the pedestal and the tilt adjusting member, between the two or more tilt adjusting members, and between the tilt adjusting member and the base. It is desirable to use an ultrasonic motor provided at two or more locations.

[0009]

[Function] Two or two parts that overlap each other and can be rotated horizontally
More than one wedge-shaped tilt adjusting member supports the pedestal with a variable tilt angle with respect to the base.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a longitudinal sectional view of a first embodiment of the present invention, FIG.
Is a side view, and FIG. 3 is an electric block. A pedestal 1 for mounting the surveying instrument main body is supported by a support means 3 on a base 2 fixed to a tripod or the like. The support means 3 is composed of slant adjusting members 4 and 5 each having a wedge-shaped truncated cylindrical shape. A protrusion 4 is provided on the outer periphery of the cylinder of the inclination adjusting members 4 and 5.
a, 5a are provided, and the projections 4a, 5a are provided with gears 6, 7
Are formed respectively.

Base 1, tilt adjusting member 4, tilt adjusting member 5
And the base 2 can rotate horizontally with respect to each other, and the rolling bearings 8, 9 and 10 are respectively provided between the pedestal 1 and the tilt adjusting member 4, the tilt adjusting member 5 and the tilt adjusting member 4, and between the tilt adjusting member 5 and the base 2. It is inserted. A small gear 12 is fixed to a shaft of a motor 11 fixed to the base 1, and the small gear 12 is engaged with the gear 6. A small gear (not shown) is fixed to a shaft of a motor (not shown) fixed to the base 2, and the small gear (not shown) is engaged with the gear 7.

An inclination sensor 13 is fixed to the pedestal 1. The inclination sensor 13 is a surveying instrument main body 1 mounted on the base 1.
4 to detect a two-dimensional inclination with respect to the horizontal plane, and output information relating to the inclination. The tilt sensor 13 is a combination of two sensors 13a and 13b for detecting a one-dimensional tilt provided in two orthogonal directions, but a sensor capable of detecting a two-dimensional tilt is used. May be used.

As shown in FIG. 2, a connecting member 2 is
1 is fixedly provided, and a rotation preventing member 22 is fixedly provided at the tip of the connecting member 21. A restricting member 23 is fixed to the base 2, and a guide groove 24 is formed in the restricting member 23.
The rotation preventing member 22 is slidably engaged with the guide groove 24, and the pedestal 1 can move in the vertical direction with respect to the base 2, but the horizontal rotation with the base 2 is prevented.

As shown in FIG. 3, the control unit 15 includes a CPU 1
7 and motor drive circuits 18a and 18b.
The operation unit 16 of the input device is a device for inputting an automatic leveling command to the CPU 17.
From 17, a stop command is issued to the operation unit 16. The tilt angle output circuits 13c and 13d are circuits that output detection signals of the tilt angles obtained by the sensors 13a and 13b to the CPU 17. The motor driving circuits 18a and 18b are circuits for driving the motors 11 and 11a, respectively, in accordance with the calculation results of the CPU 17.

Next, the operation will be described. First, the surveying instrument 14 is mounted and fixed on the pedestal 1 of the leveling device, and the base 2 is fixed on the foot of a tripod. Although the tripod is installed while adjusting the tripod legs so that the upper surface of the tripod head is as horizontal as possible, the leveling device still tilts. When the leveling device is tilted, the surveying instrument mounted on the tripod is installed in a tilted state. When a leveling start command is input by operating the operation unit 16, the sensors 13a and 13b detect the inclination angle of the surveying instrument. This detection signal is output from the tilt angle output circuits 13c and 13d to the CPU 17 of the control unit 15.

The CPU section 17 performs an operation in accordance with a preset method based on information on the inclination angle and the inclination direction obtained from the detection signal. According to the calculation results, the motor drive circuits 18a and 18b output control signals for instructing the motors 11 and 11a to indicate the number of rotations of the motor and the direction of rotation of the motor. When the motors 11 and 11a are driven in accordance with the control signals, the rotations of the motors 11 and 11a respectively
It is transmitted to the inclination adjusting members 4 and 5 via the small gears 12 and 12a and the gears 6 and 7. The tilt adjusting members 4 and 5 respectively rotate clockwise or counterclockwise around the center 19 of the leveling device. During this time, the pedestal 1 and the base 2 have the rotation preventing member 22 on the pedestal 1 side fitted in the guide groove 24 on the base 2 side, so that mutual horizontal rotation is prevented.

The wedge angles of the inclination adjusting members 4 and 5 are respectively set to θ.
₁ and θ ₂ , the maximum tilt adjustment angle θ _MAX is θ _MAX
= Θ ₁ + θ ₂ , the minimum tilt adjustment angle θ _MIN is θ _MIN = θ
₁₋ θ ₂ (θ ₁ > θ ₂ ). Actually θ _MIN =
Since it is necessary to set 0, θ ₁ = θ ₂ = θ, θ _MAX = 2
θ. In this way, the inclination adjustment members 4 and 5 cause 0
The inclination can be adjusted between 2 and 2θ.

The relative rotation of the tilt adjusting members 4 and 5 by the motors 11 and 11a provides a required tilt adjusting angle. Further, the motors 11 and 11a allow the tilt adjusting members 4 to move in the tilt direction of the pedestal 1. If the rotation is performed so that the directions of the inclination adjustment angles of 5 and 5 coincide with each other, the attitude of the surveying instrument 14 is in a vertical state, and the leveling is completed. It goes without saying that the CPU 17 can immediately adjust the magnitude and direction of the tilt adjustment angle by rotating the tilt adjustment members 4 and 5 by the motors 11 and 11a.

When the attitude of the surveying instrument 14 is vertical, information indicating that the sensors 13a and 13b are not tilted is transmitted from the tilt angle output circuits 13c and 13d, and the CPU 17 recognizes that leveling has been completed. And a motor driving circuit 1
8a and 18b output a stop control signal to each of the motors 11a and 11b. When the stop control signal is output, the leveling start command of the operation unit 16 is released.

FIG. 4 is a longitudinal sectional view of a second embodiment of the present invention. A pedestal 31 for mounting the surveying instrument body is supported by a support means 33 on a base 32 fixed to a tripod or the like. The support means 33 is composed of slant adjusting members 34 and 35 having a wedge-shaped truncated cylindrical shape. Pedestal 3
1, tilt adjusting member 34, tilt adjusting member 35, and base 32
Can rotate horizontally with respect to each other. In order to form an ultrasonic motor between the pedestal 31 and the tilt adjusting member 34, a driving member in which the piezoelectric body 36 and the elastic body 37 constituting the ultrasonic motor are pressed against each other, and between the tilt adjusting member 35 and the base 32. The driving member in which the piezoelectric body 38 and the elastic body 39 are pressed against each other is fitted respectively. A rolling bearing 40 is fitted between the inclination adjusting members 34 and 35.

An inclination sensor 41 is fixed to the pedestal 31 and detects a two-dimensional inclination of the surveying instrument mounted on the pedestal 31 with respect to a horizontal plane. On the other hand, a rotation preventing member 44 is fixed to the pedestal 31 via a member 42, and a horizontal rotation of the pedestal 31 is prevented by a restricting member 43 formed on the base 32. The other parts are the same as those in the first embodiment, and the detailed description thereof will be omitted.

In the first and second embodiments, since the supporting means has almost the same area as the pedestal and the base and is thin, it is not bulky and the contact area between the pedestal and the base and the supporting means is large. As a result, the rigidity of the entire leveling device can be increased.

A rolling bearing member is provided between the pedestal and the tilt adjusting member, between two or more tilt adjusting members, and between the tilt adjusting member and the base. The operation can be performed smoothly even if the contact area is large.

Further, in the second embodiment, the inclination angle changing means is constituted by an ultrasonic motor, and the space occupied by the ultrasonic motor is small, so that the overall leveling device can be made more compact. .

In the first and second embodiments, it goes without saying that the leveling operation can be performed by manually rotating the inclination adjusting member.

[0026]

According to the present invention, since the supporting means has almost the same area as the pedestal and the base and is thin, it is not bulky, and a large contact area between the pedestal and the base and the supporting means is ensured. Therefore, it is possible to increase the rigidity of the entire leveling device.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an apparatus according to a first embodiment of the present invention.

FIG. 2 is a side view of the device according to the first embodiment of the present invention.

FIG. 3 is a block diagram of an electric circuit used in the device according to the first embodiment of the present invention;

FIG. 4 is a longitudinal sectional view of a device according to a second embodiment of the present invention.

[Explanation of symbols]

 1, 31, base 2, 32 base 3, 33 support means surveying instrument 6, 7, gear 8, 9, 10 Rolling bearing 11, 11a ··· Motor 12, 12a ··· Small gear 13 ····· Tilt sensor 13a: 13b · Sensor 15 ··· Control unit 36, 38 ··· Piezoelectric body 37, 39 · ..Elastic bodies

Claims (4)

(57) [Scope of request for utility model registration] 1. A pedestal on which a surveying instrument main body is mounted, a base opposed to the pedestal, and support means for supporting the pedestal at a variable inclination angle with respect to the base, wherein the inclination angle is changed. A leveling device for leveling the surveying instrument main body, further comprising a blocking means for blocking the horizontal rotation of the pedestal and the base with each other, wherein the supporting means are overlapped with each other and are capable of horizontal rotation. A leveling device comprising at least one wedge-shaped inclination adjusting member. 2. The leveling device further includes: a tilt angle changing unit that drives the tilt adjusting member to change the tilt angle; a control unit that controls the tilt angle changing unit; and a vertical direction of the surveying instrument main body. An inclination sensor for detecting an inclination with respect to the inclination angle, and based on the inclination detected by the inclination sensor, leveling the surveying instrument body by changing the inclination angle. Associate equipment. 3. A rolling bearing member is provided between the pedestal and the tilt adjusting member, between the two or more tilt adjusting members, and between the tilt adjusting member and the base. The leveling device according to claim 2, wherein: 4. The tilt angle changing means includes a portion between the pedestal and the tilt adjusting member, a portion between the two or more tilt adjusting members, and a portion between the tilt adjusting member and the base. The leveling device according to claim 2, comprising an ultrasonic motor provided at any two places or at two or more places.