JP2935761B2 - Method and apparatus for re-installing steel frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of assembling a steel frame on the surface of the ground, successively adding the steel frame to an upper side of an already assembled steel structure, and forming a high-rise steel structure. The present invention relates to a method for re-installing a steel frame for adjusting a standing posture of a steel frame to be added to the steel frame.

[0002]

2. Description of the Related Art As a steel structure becomes higher in height, the lifting work for lifting a single material, such as a steel column, used from the ground to a high place is increased, and accordingly, the construction period is lengthened and the degree of danger is increased. Also tend to increase. Therefore, in order to simplify the lifting work of the material, a plurality of steel columns and beams are joined in advance on the ground surface to form a block-shaped steel frame, and the steel frame is lifted up to a high place by a crane. Therefore, a construction method is employed in which a steel structure is constructed by adding the steel structure already assembled to the upper side and successively increasing the height of the structure.

[0003] When the laid steel frame is added to the upper side of a steel structure already assembled, conventionally, the laid steel frame is lifted from the ground surface, and a steel frame located at the lower end of the steel frame is conventionally used. The lower end of the column is applied to the upper end of the steel column above the steel structure, and the erection pieces provided on the side of the end of the steel column connected above and below are connected and temporarily installed (temporary installation). Then, the worker moves the crane that suspends the steel frame while visually checking it, adjusts the standing posture of the steel frame, re-installs, and subsequently fixes the erection pieces.

[0004] After the steel frames are joined by welding the contact portions of the upper and lower steel columns, unnecessary erection pieces are cut.

[0005]

However, as the height of the steel structure increases, it is required that the steel frame to be added to the upper side be installed with a high degree of precision. There is a problem in that the inserted steel frame is shaken by wind or the like, and the installation inspection is visually confirmed, so that it is not possible to expect an installation accuracy higher than a predetermined value.

[0006] In particular, while the worker visually confirms, he or she adds to the upper side of the steel frame structure, and adjusts the inclination of the standing posture of the upper steel frame by the weight suspended from the top of the steel frame. Although it is carried out while checking in, it takes time because it is necessary to adjust the steel frame from two or more directions while checking the standing posture of the entire steel frame collectively,
In addition, since the installation inspection is performed visually, there is a problem that the accuracy of the installation of the steel frame varies.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems. It is an object of the present invention to improve the accuracy of setting the steel frame to be added to the upper side and to automate the work of adjusting the re-installation of the steel frame. The purpose is.

[0008]

In order to achieve the above-mentioned object, a method for re-installing a steel frame according to the present invention is to provide a method for re-installing a steel frame which is erected by a plurality of steel columns, beams and the like. In the method of temporarily erection on the upper side of the structure and re-installing the tentatively erected steel frame to a predetermined standing posture, one steel column of the plurality of steel columns constituting the steel frame is Considering the reference steel column, by detecting the displacement information of the inclination direction and the inclination angle from the target standing posture with respect to the reference steel column, a virtual frame formed by a plurality of lower end portions of the steel frame constituting the steel frame is detected. Analyzing the inclination direction and inclination angle of the plane, based on the analysis information, with the lower end of the reference steel column as a fulcrum, the lower ends of a plurality of steel columns in mutually different directions from the reference steel column, At the bottom of the steel column By moving up and down by a predetermined amount the drive means via a respective erection piece it is, is characterized in that by adjusting the inclination degree of the virtual plane to adjust the vertical position of the entire steel frame.

Further, as an apparatus used for re-installing the steel frame, each erection piece provided on the lower side surface of a plurality of steel columns located in different directions from the reference steel column is vertically moved. Drive means, a target attached to the upper part of the reference steel column, extending laterally and having a measurement mark on the lower surface of the extension, and a steel frame of a steel structure joined to the lower end of the reference steel column A camera installed at the top of the pillar or in the vicinity thereof and having the light receiving axis directed toward the measurement mark of the target, connected to the camera, processing an image signal from the camera to determine a displacement of the measurement mark with respect to a reference position, An image processing device that determines the standing posture of the reference steel column; and an image processing device that is connected to the image processing device and drives the driving device based on a signal from the image processing device to drive each iron of the steel frame. Good to use the construction cycle device steel frame, characterized in that a drive control device for vertically moving the erection piece of the pillar lower side respectively by a predetermined amount.

[0010]

[Function] A steel frame which has been ground and blocked is suspended by a lifting machine, and temporary construction is carried out above a steel structure already assembled. Focusing on one of the steel columns constituting the temporarily built steel frame, it is regarded as a reference steel column, and the standing posture of the reference steel column is detected. In two different directions, for example, two steel columns in directions perpendicular to each other, up and down by a predetermined amount via each erection piece provided in the steel column, thereby aiming at the standing posture of the reference steel column The standing posture of the entire steel frame is adjusted by adjusting the standing posture.

The standing posture of the entire steel frame is adjusted by adjusting the standing posture of the reference steel column.
This constitutes a steel frame to be built by vertically moving the lower ends of the steel columns in mutually different directions from the fulcrum with the lower end of one of the steel columns constituting the steel frame as a fulcrum. The inclination of a virtual plane formed by the lower ends of the plurality of steel columns is adjusted to adjust the standing posture of the steel frame. The determination of the inclination of the virtual plane is determined by the standing posture of the reference steel column. Is determined.

As means for judging the standing posture of the reference steel column, for example, a target is mounted on the upper portion of the reference steel column, and a camera is mounted on the upper portion of the steel column of the steel structure joined to the lower end of the reference steel column. So that the measurement mark of the target is included in the field of view of the camera.
Then, an image signal of the measurement mark reflected by the camera is sent to an image processing device, and the image processing device processes the image signal to calculate coordinate information and the like, and calculates the coordinate information and the like from the target reference position. Of the standard steel column is determined from the displacement.

Based on the information, the control device moves each erection piece up and down by a predetermined amount to move the lower end of the corresponding steel column up and down by a predetermined amount, thereby bringing the standard steel column upright to the intended posture. The entire steel frame will be rebuilt. The adjustment of the standing posture of the reference steel column is automatically repeated until the accuracy becomes acceptable.

[0014]

An embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a tower crane 2 for hanging materials is installed on an upper part of a high-rise steel structure 1 which is already constructed by adding a steel frame or the like, and as shown in FIG. The steel frame 3 that has been ground and blocked is lifted above the steel structure 1 from the ground surface.

In this embodiment, the steel frame 3 suspended by the crane 2 is composed of three upright rectangular steel columns 4.
And a girder 3a and a small girder 3b connecting the three steel columns 4 horizontally, and are formed on the ground surface while performing high-precision installation by predetermined means. The upper and lower erection pieces 6, 7 are provided on the upper and lower side surfaces of the three steel columns 4, respectively.
Is welded in advance. In FIG. 1, the erection piece is omitted.

The upper erection piece 6 provided on the upper side surface of the steel column 4 is, as shown in FIG.
The other steel column projecting laterally from the upper end side surface and extending upward, and having an arc-shaped notch 6a formed in the inner end surface portion following the upper end surface of the steel column 4 and contacting from above. And the upper end notch 6b is formed by cutting out the upper corner of the outer end face, and the jack device as a driving device can be installed on the upper end notch 6b. I have.

The lower erection piece 7 provided at the lower part of the steel column 4 is provided so as to protrude laterally from a side surface having a predetermined height from the lower end surface of the steel column 4, and coaxially connects the upper and lower steel columns. , And has a gap of about 1 mm between the lower end of the steel column and the upper end surface of the upper erection piece 7. In addition, a plurality of loose holes 6c and 7a are opened in the erection pieces 6 and 7, respectively.

The center column among the three steel columns 4 constituting the laid steel frame 3 is regarded as a reference steel column 4a. Installed. The target 11 is, as shown in FIG. 3, a contact portion 11a fixed to the upper end surface of the steel column 4.
And a flat mark portion 11b extending laterally from the contact portion 11a. A magnet 11c for magnetically attaching to the upper end surface of the steel column 4 is attached to the lower surface of the contact portion 11a, and a black circle having a guide hole 11d at the center is formed on the lower surface of the mark portion 11b. The drawn measurement mark 11e is formed.

The laid steel frame 3 is a steel structure 1
And is added to the upper side of the already assembled steel structure 1 as shown in FIG. That is, the steel column 1a on the upper part of the steel structure 1.
The lower end surface of the steel column 4 below the suspended steel frame 3 is guided by the guide piece 1b from above,
As shown in FIG. 5, the upper end surface of the upper erection piece 6 of the steel column 1 a on the side of the steel structure 1 and the steel column 4 on the side of the steel frame 3.
The lower end surface of the lower erection piece 7 is vertically opposed, and another plate-like connecting plate 12 is applied to the side surfaces of the upper and lower erection pieces 6 and 7 from the lateral direction. Holes corresponding to the loose holes of the upper and lower erection pieces 6 and 7 are formed in the connecting plate 12 so as to pass through the holes of the connecting plate 12 and the loose holes of the upper and lower erection pieces 6 and 7. The steel frame 3 is temporarily attached through bolts, and the steel frame 3 is
Temporary erection is carried out on the upper side of. In FIG. 4, the erection pieces 6, 7 and the small beams 3b are omitted.

The steel column 1 of the steel structure 1 to be joined to the reference steel column 4a to which the target 11 is attached.
As shown in FIG. 6, a camera 20 is attached to the upper periphery of the target 11 using a clamp 20b or the like, and the light receiving axis 20a of the camera 20 is positioned above the mark portion 11 of the target 11.
Turn to b. The light receiving axis 20a does not necessarily need to be in the vertical direction, but can be set by setting an angle of elevation or the like in an image processing device 21 described later.

The camera 20 is connected to an image processing device 21 as shown in FIG.
1 inputs an image signal from the camera 20 and analyzes the image signal. The image processing device 21 includes an A / D conversion unit 21a that performs digital conversion of an input image, an image processing unit 21b that performs image analysis of a digitized image signal,
A data storage area 21c for storing data such as reference coordinates,
The display control unit 21d that controls the display on a display (not shown), and the displacement amounts in the X and Y directions between the reference coordinates 30 and the calculated coordinate information 31 on the virtual XY axis table as shown in FIG. XY axis table control unit 21e to be obtained
An operation input control unit 21g for controlling data input;
A data output unit 21f for outputting a pulse signal corresponding to the displacement to each drive control device 22;
c, display controller 21d, XY axis table controller 21e
And a CPU 21h that controls the data output unit 21f.

The image processing device 21 is connected to an X-axis drive control device 22a and a Y-axis drive control device 22b to output pulse signals to both drive control devices 22, respectively. The step motor 23 is rotated by a predetermined rotation angle corresponding to the number of pulses by the drive control device 22. The step motors 23 are respectively connected to jack devices 24.
It is connected to the.

As shown in FIG. 5, the jack device 24 is provided outside the lower erection piece 7 of the steel column 4 of the steel frame 3 and the upper erection piece 6 of the steel column 1a of the steel structure 1 opposed vertically. Notch 6 at upper end of upper end
The lower end erection piece 7 of the steel column 4b is moved up and down by the expansion and contraction of the jack device 24, with the shaft being installed up and down between the lower erection piece 7 and the lower erection piece 7. Support as much as possible.

In this embodiment, the lower erection pieces of two steel columns 4b located at both ends of three steel columns 4 constituting the steel frame 3 and perpendicular to the reference steel column 4a. As described above, the jack device 24 is mounted between the steel column 7 and the upper erection piece 6 of the steel column 1a of the steel structure 1 joined to the steel column 4b.
The erection pieces 6, 7 to which the jack device 24 is attached are erection pieces (erection pieces shown by A in FIG. 10) provided on the side opposite to the side facing the reference steel column 4a. The erection pieces 7 move up and down by the vertical movement of the jack device 24 attached to the steel column 4b at both ends, and the lower ends of the corresponding two steel columns 4b move up and down by a predetermined amount. In addition, the position of the erection piece in which the jack device 24 is installed is not limited to the above-described position. In some cases, the jack device 24 is installed for a plurality of erection pieces in one steel pillar 4b, and May be moved up and down.

The vertical movement of the lower ends of the steel columns 4b located at the both ends is caused by the vertical beams 3a connecting the vertically moving steel columns 4b and the reference steel columns 4a, each serving as a lever arm. The inclination angle and direction of the reference steel column 4a are changed by a corresponding angle, and thus the steel column 4 constituting the steel frame 3 is changed.
The angle and direction of the inclination of the virtual plane S formed at the lower end are changed with the lower end of the reference steel column 4a as a fulcrum.

In order to detect the degree of inclination of the reference steel column 4a, a window is set as a preprocessing so that an image (such as a sky or a shield) other than the mark portion 11b attached to the reference steel column 4a does not enter. Or a light amount, a contrast, a threshold value, and the like for binarization. The magnification of the camera 20, the distance between the camera 20 and the steel column,
The distance between the target and the target 11, the amount of vertical movement of the jack device 24 per pulse, and the like are set in the image processing device 21 via the operation input control unit 21g. Further, vector information such as a direction and a distance of the steel column 4b corresponding to the erection piece to which the jack device 24 is attached with respect to the reference steel column 4a, and X in a virtual two-dimensional XY axis table.
The image processing device 21 is made to learn so that the directions of the axis and the Y axis correspond to each other. In this embodiment, the directions of the steel columns 4b at both ends in directions orthogonal to each other from the reference steel column 4a correspond to the X axis and the Y axis as shown in FIG.

In the image processing device 21, an image signal of the measurement mark 11e captured by the camera 20 is input, a reference coordinate 30 for positioning is calculated, and stored in the data storage area 21c. Next, the measurement mark 11e at the top of the reference steel column 4a is photographed by the corresponding camera 20, and the image signal of the measurement mark 11e is sent to the image processing device 21. The image processing device 21 converts the input image signal of the measurement mark 11e into a digital signal by the A / D converter 21a.
The measurement mark 1
The coordinate information 31 of 1e is calculated.

Next, the XY-axis table controller 21e compares the coordinate information 31 with the stored reference coordinates 30. The displacement between the coordinate information 31 and the reference coordinates 30 is calculated by vector decomposition. Virtual 2D X axis, Y
The amount of displacement of the shaft in two directions is obtained. Then, the number of pulses proportional to the amount of displacement in the two directions is individually transmitted from the data output unit to the X-axis drive control device 22a and the Y-axis drive control device 22b. The pulse is selected and output from two types of pulses, a positive direction and a negative direction.

Each drive control device 22 applies a current for rotating each step motor 23 in the direction (positive direction or negative direction) specified by the input pulse. Then, each step motor 23 rotates by a predetermined angle in the direction specified by the drive control device 22. The motor 2
The rotation angle of 3 rotates in proportion to the number of output pulses from the image processing device 21. For example, if the step angle of the step motor 23 per pulse is 1.8 degrees, 10
Rotate 18 degrees with a pulse.

Subsequently, the rotation of the step motor 23 is transmitted to the speed reducer 25, and the jack device 24 moves up and down via the speed reducer 25. The speed reducer 25 increases the torque from the step motor 23, and subdivides the rotation angle to obtain an accuracy equal to or less than the step angle (1.8 degrees), and moves the jack device 24 up and down by one pulse unit. The amount of movement is reduced.

The lower erection piece 7 also moves up and down in accordance with the up-and-down movement of the jack device 24, and the steel column 4b is moved up and down following the lower erection piece 7 to adjust the standing posture of the reference steel column 4a. In the above-described processing, the image processing apparatus 21 continues to emit pulses until the relationship between the input coordinate information 31 of the measurement mark 11e and the reference coordinates 30 is within the allowable range, and the standing posture of the reference steel column 4a is adjusted. The inclination of the virtual plane S formed by the lower end of the steel frame column 4 of the frame 3 is adjusted, and the steel frame 3 is re-installed.

The image processing apparatus 21 learns in advance so that the two axes of the XY axis table correspond to the respective directions from the center of the target reference steel column 4a to the mutually orthogonal two steel columns 4b. However, the relationship between the vertical movement of the lower erection piece 7 corresponding to the X axis and the displacement of the inclination angle of the steel column is shown in FIG.
When the lower end of the steel column 4b is lowered through the
1) The reference steel column 4a is inclined in the forward direction toward the steel column 4b by an angle proportional to the descending amount (51 in FIG. 9),
When the coordinate information 31 of the measurement mark 11e on the XY-axis table is moved in the positive direction of the X-axis and the lower erection piece 7 is raised (42 in the figure), the reference steel frame is moved by an angle proportional to the amount of rise. The column 4a is inclined in the negative direction toward the steel column 4b (52 in the drawing), and the coordinate information 31 of the measurement mark 1e on the XY axis table is moved in the negative direction of the X axis. The same applies to the relationship between the vertical movement of the lower end of the steel column 4b corresponding to the Y axis and the movement of the inclination of the reference steel column 4a.

For example, if the position of the coordinate information 31 on the virtual XY-axis table is analyzed as shown in FIG. 8, the X-axis and Y-axis corresponding to the displacement amount are
A pulse instructing movement in the individual negative direction with respect to the axis is output, and each lower erection piece 7 corresponding to the X axis and the Y axis rises in proportion to the number of pulses, and the coordinate information 31 is changed to the reference coordinate 30. Approach.

Thus, by bringing the coordinate information 31 of the measurement mark 11e closer to the reference coordinates 30 on the virtual XY axis table, the inclination angle of the reference steel column 4a becomes the reference inclination angle. The degree of inclination is adjusted to a virtual plane formed by the lower end of the steel column 4 of the frame 3, so that the steel frame 3 can be re-installed with high accuracy. When the rebuilding of the steel frame 3 is completed, the temporarily fixed bolts of the erection pieces 6 and 7 and the connecting plate 12 are crimped to fix the standing posture of the steel frame 3, and subsequently the steel frames of the steel frame 3 are fixed. The contact portion of the steel structure 1 contacting the lower end of the column with the steel column 1e is welded and joined.

When the joining is completed, the connecting plate 12
And the unnecessary erection pieces 6, 7 are cut from the steel column. As described above, the steel frame 3 to be added
The rebuilding of the building is automated, labor is saved, the accuracy of the building is improved, and it is possible to cope with an increase in the height of the steel structure. Further, in this embodiment, since the jack device is installed between the erection pieces 6 and 7 to move the steel column 4a up and down, the jack device is installed between the upper and lower steel columns. There is no need to provide a temporary member for the steel column.

In this embodiment, the target 11 is attached to the top of the reference steel column. However, the target 11 may be fixed to a predetermined height of the reference steel column 4a by a known means such as a clamp. In this embodiment, the number of steel columns constituting the grounded steel frame is three, but four or more steel columns may be provided. In this case as well, one steel column as a reference is selected, and the lower end of the steel column is used as a fulcrum, and two or more steel columns located in mutually different directions from the fulcrum are vertically moved via the lower erection piece 7. By moving the steel frame, the standing posture of the reference steel column is adjusted, whereby the degree of inclination of the virtual plane formed by the steel column forming the steel frame is adjusted, and the entire steel frame is re-installed.

Further, in this embodiment, the stepping motor 23 is connected to the jack device 24 to move the lower erection piece 7 up and down. However, it is possible to move the lower erection piece 7 up and down by other known driving means such as using a hydraulic cylinder device. You may let it. Further, in this embodiment, the lower part of the steel column 4b in the direction orthogonal to each other is moved up and down from the reference steel column 4a. However, the steel column 4b to be moved up and down is not necessarily required to be orthogonal and is in the same direction. Otherwise, the lower portions of the steel columns in directions such as 120 degrees may be moved up and down with respect to each other.

Further, the detection of the standing posture of the reference steel column 4a is not limited to the means of the present embodiment, and the standing posture may be detected by another known device.

[0039]

As described above, in the method for re-installing a steel frame according to the present invention, when the laid steel frame is added to the upper part of the already assembled steel structure, the steel frame is re-installed. Is automated, and the accuracy of the installation of the steel frame is improved, making it possible to cope with a high-rise steel structure.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a steel frame structure and a steel frame of the present embodiment.

FIG. 2 is a side view showing an erection piece.

FIG. 3 is a perspective view showing a target.

FIG. 4 is a perspective view showing the connection between the steel frame structure and the steel frame of the present embodiment.

FIG. 5 is a side view showing the connection of the upper and lower erection pieces and the jack device.

FIG. 6 is a side view showing an installation relationship between a camera and a target.

FIG. 7 is a block diagram showing a rebuilding device according to the present embodiment.

FIG. 8 is a diagram illustrating an XY axis table according to the present embodiment.

FIG. 9 is a schematic diagram illustrating a change in inclination of a reference steel column according to the present embodiment.

FIG. 10 is a diagram illustrating a virtual plane according to the present embodiment.

[Explanation of symbols]

 Reference Signs List 1 steel structure 3 steel frame 4 steel frame of steel frame 6 upper erection piece 7 lower erection piece 11 target 11e measurement mark, 20 camera 21 image processing device 22 drive control unit 24 jack device 30 reference coordinate 31 coordinate information, S virtual Plane

Claims (2)

(57) [Claims] 1. A steel frame erected by a plurality of steel columns and beams is temporarily erected above a steel structure already assembled, and the temporarily erected steel frame is erected in a predetermined manner. In the method of rebuilding in the posture, one of the plurality of steel columns constituting the steel frame is regarded as a reference steel column, and the inclination direction and the inclination angle from the intended standing posture with respect to the reference steel column. By detecting the displacement information, the inclination direction and the inclination angle of the virtual plane formed by the lower end portions of the plurality of steel columns constituting the steel frame are analyzed,
Based on the analysis information, the lower end of the reference steel column is used as a fulcrum, and the lower ends of a plurality of steel columns in mutually different directions from the reference steel column are provided at the lower part of the steel column. A method of re-installing a steel frame, wherein the upright posture of the entire steel frame is adjusted by moving the erection piece up and down by a predetermined amount by a driving unit to adjust the degree of inclination of the virtual plane. 2. With respect to a steel frame temporarily erected above a steel structure already assembled, one of a plurality of steel columns constituting the steel frame is regarded as a standard steel column, A drive means for vertically moving each erection piece provided on a lower side surface of a plurality of steel columns located in mutually different directions from the steel column, and a driving means attached to an upper portion of the reference steel column and extending laterally; A target having a measurement mark on the lower surface of the extending portion, and a camera installed at or near the upper part of the steel column of the steel structure joined to the lower end of the reference steel column and having the light receiving axis directed toward the measurement mark of the target And an image processing device connected to a camera, which processes an image signal from the camera to determine a displacement of the measurement mark with respect to a reference position, and determines an upright posture of the reference steel column. A drive control device for driving the drive device in response to a signal from the image processing device to move the erection pieces on the lower side surface of each steel column of the steel frame up and down by a predetermined amount, respectively. Rebuilding equipment for steel frames.