JPH07280549A - Support apparatus for electronic distance meter - Google Patents

Abstract

PURPOSE:To enable always keeping of an optical axis of an electronic distance meter vertical constantly regardless of changes in the levelness of a moving object. CONSTITUTION:This apparatus comprises an electronic distance meter 17 arranged on a working platform of a framework device 7 liftable vertically and a prism 18 arranged securely at a ground section facing the distance meter 17. In a support apparatus 16 through which the distance meter 17 is supported vertically on the working platform 10, the support apparatus 16 is arranged securely on the working platform 10. In addition, the support apparatus is also provided with a liquid tank 20 integrated with a cylinder part 20a for transmitting light facing a reflector at the center thereof, a liquid 21 held in the liquid tank and a float 22 which floats on the liquid 21 and has an opening 22a formed wrapping the cylinder part 20a at the center thereof. A detecting surface 17a of the light wave range finder 17 is fixed upside down vertically at the upper center of the float 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supporting device for accurately vertically supporting an optical distance meter for measuring the construction height of a structure using, for example, a self-elevating formwork device.

[0002]

2. Description of the Related Art The slip-form construction method and the jump-form construction method are construction methods in which a concrete structure is sequentially constructed by using a self-elevating form equipment while raising the form equipment.

The formwork apparatus used in this construction method includes a formwork arranged along the cross-sectional shape of a structure, a supporting structure for supporting the formwork, and a work frame arranged around the supporting structure. On the periphery of the work platform, there are provided a main bar or a guide rod embedded in the structure, or a plurality of lifting jacks that lift by taking a reaction force to the PC steel wire hanging from the top of the structure.

In this formwork apparatus, a concrete structure can be continuously constructed upward by placing concrete in the formwork and driving the raising jacks to sequentially raise the formwork. Therefore, it is possible to construct a concrete structure in a short period of time as compared with a work method in which work cycles of pouring concrete and assembling, dismantling, and reassembling formwork are repeated.

In these construction methods, since it is important to control the construction height, a light wave range finder is used for the measurement, and a light wave range finder placed on the work platform for each rising work is used. The distance from the ground portion is measured by facing a prism fixedly arranged on the ground portion, reflecting the laser beam emitted from the light wave distance meter to the prism, and receiving again by the light wave distance meter.

[0006]

However, there are many jacks arranged around the work platform,
When ascending, these jacks are driven all at once to ascend, but the driving power may change due to the driving error of each jack itself, wind pressure, etc., and the level of the work platform after raising and stopping may change slightly each time. . For this reason, when the optical axis of the optical distance meter is displaced from the prism, measurement cannot be performed, and therefore it is necessary to adjust the level each time, which is troublesome.

The present invention has been made to solve the above problems, and its object is to solve the above problems regardless of the change in the horizontality of the moving body.
(EN) Provided is a supporting device for an optical distance meter, which can always hold the optical axis of the optical distance meter vertically.

[0008]

To achieve the above object, the invention according to claim 1 is directed to a reflector which is arranged on a moving body and fixedly arranged at a position vertically separated from the moving body. A device for supporting an optical distance meter that measures the distance to the reflector by the reflected light emitted by the irradiation, and is integrally provided with a light-transmitting tube portion fixedly arranged on the moving body and facing the reflector in the center. And a float that floats on the liquid contained in the liquid tank and has an opening formed in the center that surrounds the periphery of the cylindrical portion and to which the optical distance meter is fixed. Is characterized by.

According to a second aspect of the present invention, the plane shape of the float disposed in the central upper portion of the float is substantially equilateral triangle, and the lower end of the triangle penetrates the apex of the triangle. It is characterized in that the lightwave distance meter is fixed to the float through a vertical adjusting table having an adjusting screw that abuts on the upper surface.

[0010]

According to the above construction, the level of the liquid surface of the supporting device is constant even if the level of the moving body changes after the rising and stopping of the moving body, and the level of the float becomes horizontal after the shaking of the float has subsided. It converges, and the detection surface of the optical distance meter located above it has a horizontal posture and is automatically corrected to have the same optical axis with respect to the reflector on the ground.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows the overall construction of a support device for an optical distance meter according to the present invention applied to, for example, a slipform device for constructing a high pier. The high pier 1 is a foundation constructed on the ground. Along the circumference of a plurality of hollow steel pipes 3 standing upright, a large number of longitudinal main bars 5 are arranged, and a PC strand 6 constituting a horizontal bar is wound around the outer circumference thereof by a self-elevating formwork device 7. Concrete C on the inside
It is constructed one by one by casting.

The formwork device 7 comprises a concrete placing formwork 8 surrounding the cross-sectional shape of the high pier 1, and a formwork 8 for surrounding the same.
It is provided with a large number of supporters 9 which are in contact with the back side of the supporter so as to slidably support them in the vertical direction, and a work platform 10 which is integrated so as to surround the supporters 9.

On the other hand, an H-shaped steel material 12 is installed on the top of the hollow steel pipe 3 in a state of being combined in a cross beam shape, and a large number of PC steel wires 14 hanging down from the H-shaped steel material 12 for receiving a reaction force.
Through the hydraulic jacks 15 provided on the work platform 10 to support the formwork device 7 in a suspended state, and the formwork device 7 drives each of the hydraulic jacks 15 in unison so that each PC steel wire 14 Rises by taking the reaction force.

An optical distance meter 17 is arranged on the work base 10 via a support device 16 according to the present invention, and faces a prism 18 (reflector) fixedly arranged on the base 2.

As shown in FIGS. 2 and 3, the support device 16 is fixed by penetrating the upper and lower sides of the work platform 10 and integrally provided with a light-transmitting tubular portion 20a facing the reflector in the center thereof. The rectangular liquid tank 20 and the cylindrical opening 22a that floats in a state where a part is immersed in the liquid 21 contained in the liquid tank 20 and surrounds the periphery of the cylindrical portion 20a in the center.
And a plurality of stoppers 2 protruding from the inside of the liquid tank 20 for attenuating the initial swing by contacting the outside of the float 22.
3 and a cover 24 that covers the upper portion of the liquid tank 20, and the detection surface 17a of the optical distance meter 17 is located on the lower surface side through a vertical adjustment table 25 having a plane shape of an equilateral triangle in the upper central portion of the float 22. The prism 18 is fixed vertically.

As the liquid 21, it is preferable to use, for example, engine oil, which has a certain degree of viscosity and a high vibration absorbing ability. On the other hand, the float 22 is a hollow lightweight body made of aluminum or the like, floats with a predetermined buoyancy on the liquid 21, and has the lightwave range finder 17 mounted in the center and its installation surface is the same horizontal surface as the liquid surface. The trim balance is adjusted in advance so that

The vertical adjusting table 25 is for adjusting the initial verticality of the lightwave distance meter 17, and has three adjusting screws 25a which penetrate the apex of the triangle and whose lower end abuts on the upper surface of the float 22. By adjusting the amount of advance / retreat individually, the optical axis of the detection surface 17a is made to coincide with the prism 18, and the optical distance meter 17 is fixed on the float 22.

Further, a box 26 for control and signal transmission connected to the optical distance meter 17 is provided inside the cover 24, and measurement is performed from the box 26 through a signal transmission cable 27 drawn to the outside of the cover 24. It is connected to the computing means that constitutes the display and operating unit for the.

In the above construction, by driving the hydraulic jacks 15 all at once after placing and curing the concrete C using the formwork device 7, the formwork device 7 as a whole rises according to each jack stroke.

At this time, as described above, each hydraulic jack 1
Even if the horizontal level of the work platform 10 changes due to the drive power error of No. 5 or the drive power difference due to wind pressure, and the liquid tank 20 is tilted accordingly, the liquid 21 may shake due to vibration or shock when rising. After the shake of the float 22 accompanying this has converged, the float 22 is horizontally self-corrected, and the optical axis P from the detection surface 17a of the optical distance meter 17 is aligned toward the prism 18 side, and a measurable state is obtained. Becomes

In the above embodiment, the formwork apparatus 7 used in the slip-form construction method is exemplified as the moving body, but the moving body of the present invention is not limited to the formwork apparatus, and
The moving body itself does not have to move up and down, as long as the moving body and the reflector are separated from each other in the vertical direction.

[0023]

As described above in detail with reference to the embodiments, in the supporting device of the optical distance meter according to the present invention,
Even if the level of the moving body changes after it stops rising, the level of the liquid level of the supporting device is constant.After the shake of the float has stopped, the float converges horizontally and the distance of the light wave located above it. The detection surface of the meter has a horizontal posture and is automatically corrected to have the same optical axis as the reflector on the ground. There is an advantage that the troublesome work by this can be omitted. Further, according to the present invention, there is an advantage that the detecting means and the driving means for the automatic correction are not particularly required and the structure is simple, so that there is no failure and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an overall explanatory view of a case where a supporting device for an optical distance meter according to the present invention is applied to a slipform device for constructing a high pier.

FIG. 2 is a vertical cross-sectional view showing a main part of the support device.

FIG. 3 is a plan sectional view of the support device.

[Explanation of symbols]

 7 Formwork device (moving body) 10 Work platform (constituting a part of moving body) 16 Supporting device 17 Lightwave distance meter 18 Prism (reflector) 20 Liquid tank 20 Light-transmitting cylinder 21 Liquid 22 Float 22a Opening

Claims (2)

[Claims] 1. A light wave range finder for measuring the distance to a reflector by means of reflected light radiated toward the reflector which is arranged on the moving body and is fixedly arranged at a position vertically separated from the moving body. A supporting device, which is fixedly arranged on the moving body, and has a liquid tank in which a light-transmissive tube unit facing the reflector is integrated in the center, and floats on a liquid contained in the liquid tank. And a float to which the opening for surrounding the circumference of the cylindrical portion is formed in the center and to which the optical distance meter is fixed, and a supporting device for the optical distance meter. 2. The float is arranged in the center upper part of the float and has a substantially equilateral triangular shape in a plan view, and has an adjusting screw penetrating the apex portion of the triangle and having its lower end abutting the upper surface of the float. The lightwave rangefinder is fixed to the float via a vertical adjustment stand.
The device for supporting a light-wave rangefinder according to.