JP6529407B2 - Method of manufacturing grid structure - Google Patents

Description

  The present invention is applicable to large structures, such as high-rise buildings, bridges, high-rise towers, large parabolic antennas, radio telescopes, optical telescopes, etc., which are constructed by combining columns such as pipes and columns. The present invention relates to a manufacturing method for manufacturing a grid point structure in which a plurality of columnar bodies radially extend from a point by a predetermined angle.

For example, Patent Document 1 and Patent Document 2 disclose techniques for positioning components using laser light when manufacturing or assembling a structure or the like.
Patent document 1 is a medical system provided with a radiation treatment apparatus, and in order to position an object, a cross line laser is vertically irradiated from a light projecting unit on a ceiling surface to a scanning gantry and received by a light receiving unit on a floor surface. The cross line laser is horizontally emitted from the light projection unit on one side wall to the scanning gantry and received by the light receiving unit on the other side wall, and feedback control is performed to the light projection unit from the data of the light receiving unit. A technique for adjusting the positions of the light unit and each light receiving unit is disclosed.

  Patent document 2 is "the installation method of a box structure", and when grasping | ascertaining the attitude | position of the square pipe in the case of installing a box structure, it crosses a cross-line laser from a laser surveying apparatus (laser ink writing device) horizontally. By irradiating in the direction, the horizontal, vertical and rotational attitudes of the square pipe are surveyed from the relative position with the three survey lines installed on the inner surface of the square pipe.

  In Patent Literatures 1 and 2, since a laser marking device (also referred to as a light projecting unit or a laser surveying device) for surveying that horizontally projects laser light composed of horizontal lines and vertical lines orthogonal to each other is used, This is very convenient for positioning a subject relative to the horizontal or vertical to a structure or detecting the posture of the subject.

JP 2008-29647A JP, 2014-163098, A

  However, when manufacturing a grid point structure by joining a plurality of objects having a predetermined elevation angle and depression angle with respect to a horizontal surface, the object to be inclined is inclined using the above-described laser marker which always emits laser light only in the horizontal direction. When reading the displacement of a sample, the number of measurement steps is very large, and there is a problem that it is necessary to use a calculation formula and it is troublesome.

  The present invention solves the above-mentioned problems and can easily carry out postures and positionings of a plurality of columnar bodies extending in the inclined direction at a predetermined angle from the grid point instead of the horizontal and vertical directions. An object of the present invention is to provide a method of manufacturing a grid structure that can efficiently manufacture a structure.

The present invention uses a cross line laser beam consisting of a first line and a second line orthogonally crossing on the optical axis to join a plurality of pillars extending in an inclined direction at a predetermined angle away from a grid point of a reference pillar. A method of manufacturing a grid point structure for manufacturing the
A laser beam arrangement step of arranging the optical axis of the cross line laser beam from the axial center of the columnar body toward the grid point;
A connection end target corresponding to each of the first line and the second line is provided on the connection end side of each columnar body, and an end target corresponding to each of the first line and the second line is provided on the distal end side of each columnar body Target formation process,
The columnar body on which the connection end target and the tip target are formed is disposed at a junction position with the reference columnar body, and the columnar body is matched so that the cross line laser light matches the connection end target and the tip target. Positioning process to adjust the position of
And a joining step of sequentially joining the positioned columnar body to the reference columnar body.

  According to the above configuration, bonding is performed by arranging the cross line laser light in an inclined state from the axis of the inclined columnar body to the grid point and making the first line and the second line coincide with the connection end target and the tip target, respectively. Can be positioned in a short time and with high accuracy.

  In addition, by arranging the first line of the cross line laser light in the vertical plane, the first line is placed on the reference plane on which the reference column is placed, for example, the plane view coordinates of the tube scored on the surface plate. By matching, the inclination angle around the axis of the cross line laser beam can be easily set with high accuracy.

  Furthermore, by forming the end target on the end surface of the columnar body or on the end plate attached to the end surface of the columnar body, the end target can be formed easily and accurately.

  Furthermore, at least one of the connection end detection member attached to the outer periphery on the proximal end side of the columnar body, or the surface of the reference columnar body around the connecting end of the columnar body and the surface of the columnar body after bonding By forming one, it is possible to form the connection end target easily and accurately.

  In addition, after all the columns are joined to the reference columns by the laser beam placement process, the target formation process, the positioning process, and the bonding process, the attachment accuracy of the columns is measured from the amount of deviation between the tip target and the crossline laser beam. A distortion measurement process, a distortion removal process for removing distortion of the columnar body by partially heating and cooling a predetermined columnar body measured in the distortion measurement process, and a cross with the tip target after the distortion removal process And a strain re-measuring step of re-measuring the mounting accuracy of the columnar body from the amount of deviation from the line laser beam.

  In the above method, distortion of the columnar body is obtained from the amount of deviation between the first line and the second line of the cross line laser beam and the tip target of the columnar body by utilizing the cross line laser beam disposed obliquely after the bonding step. The amount can be detected easily and accurately. Thereby, the strain measurement process, the strain removing process, and the strain re-measurement process can be continuously performed subsequently to the bonding process, and the grid structure can be manufactured with high accuracy.

  According to the above invention, it is possible to efficiently read with high accuracy the postures and positionings of a plurality of pillars extending in a radial direction at a predetermined angle away from the grid point, and to efficiently manufacture the grid structure. it can.

It is a schematic perspective view which shows Example 1 of the manufacturing method of the connection point structure which concerns on this invention, and demonstrates arrangement | positioning of a connection point structure and a laser beam irradiator. It is an expansion perspective view explaining a grid structure. It is a perspective view which shows Example 1 of the light reception part of a cross line laser beam. It is a perspective view which shows Example 2 of the light reception part of a cross line laser beam. It is a perspective view which shows Example 3 of the light reception part of a cross line laser beam. It is a perspective view which shows an irradiator adjustment device. It is a perspective view which shows the modification of an irradiator adjustment device. It is a flowchart which shows the manufacturing method of a grid point structure. It is explanatory drawing which shows the measurement coordinate of a pipe | tube. It is a graph which shows the distortion measurement result of a pipe | tube. It is a graph which shows the distortion remeasurement result of a pipe | tube. It is a perspective view explaining the other positioning method of a laser beam irradiator. It is the top view and side view explaining the other positioning method of a laser beam irradiator. It is a side view explaining the other positioning method of a laser beam irradiator.

Example 1
Hereinafter, Example 1 of the present invention will be described with reference to the drawings.
A method of manufacturing a tube assembly which is a grid point structure in which a plurality of tubes (columnar bodies) are radially joined at predetermined angles with respect to a grid point will be described. The tube assembly is separated by a predetermined angle from one grid point, for use as a part of a structure such as a high-rise building or bridge, a high-rise tower, a large parabolic antenna, a radio telescope or an optical telescope. For example, three or more and up to about 20 pipes are joined by welding.

(Overview)
In FIG. 1 and FIG. 2, for example, a tube assembly 11 in which seven tubes P0 to P6 are joined is displayed. The pipe assembly 11 includes, for example, one reference pipe P0 erected in the vertical (vertical) direction on a surface plate 12 serving as a reference horizontal surface, and a case set on an axial center O0 of the reference pipe P1. For example, six pipes P1 to P6 are joined at respective elevation angles α at predetermined angles with respect to a point RP.

(Cross line laser light)
As shown in FIG. 1, cross-line laser beams CR1 to CR6 are irradiated from laser light irradiators (laser pointers) 21A to 21F from axis centers O1 to O6 of tubes P1 to P6 toward a critical point RP, respectively. Perform positioning, measurement, and correction of P1 to P6.

  As shown in FIG. 2, the cross line laser beams CR1 to CR6 emitted from the laser beam irradiators 21A to 21F are a first line Rv and a second line orthogonally crossing each other on the laser optical axis (RO described later) It has Rh.

(Tube and target)
FIG. 3 shows an example 1 of a light receiving unit for receiving the cross line laser beams CR1 to CR6 in the tubes P1 to P6. The pipes P1 to P6 are identical, so only the pipe P1 will be described. In order to receive the cross line laser beam CR1 irradiated along the axial center O1 of the tube P1, the tip end side light receiving portion 22 and the connection end light receiving portion 23 of the tube P1 are provided.

  An end plate 22a for light reception is attached to a tip end surface of the tip end light receiving portion 22 which is perpendicular to the axial center O1 at the tip end of the pipe P1. Further, the connection end light receiving portion 23 is constituted by a light receiving annular member 23a which is externally fitted and fixed to the connection end sides of the tubes P1 to P6. Then, the tip target FT formed on the surface (tip surface) of the end plate 23a is a first irradiation line (notched in the vertical direction aligned with the first line Rv irradiated through the axial center O1 position) Line) FTv, a second irradiation line (ticked line) FTh in the horizontal direction aligned with the second line Rh, and a tip surface center P1O that appears at the intersection of the first irradiation line FTv and the second irradiation line FTh Composed of The connection end target RT formed on the annular member 23a is a pair of upper and lower first irradiation lines (marked lines) RTv aligned with the first line Rv and a left and right pair aligned with the second line Rh. It consists of the 2nd irradiation line (marking line) RTh. The first irradiation line RTv and the second irradiation line RTh correspond to the first line Rv and the second line Rh, and are formed on the outer surface of the body of the pipe P1 along the axial center O1 direction in advance. It forms based on BLh and BLh.

  In addition, although the annular member 23a is described as an integral body in FIG. 3, you may connect and fix with fasteners, such as a volt | bolt, as an assembly type which can be isolate | separated into plurality. The radial projection width of the annular member 23a corresponds to the distance between the end faces of the tubes P1 to P6 and the laser beam irradiators 21A to 21F and the distance between the end faces of the tubes P1 to P6 and the annular member 23a. The protrusion width is set so as to receive the first line Rv and the second line Rh.

FIG. 4 shows an example 2 of a light receiving unit for receiving the cross line laser beam CR1 in the tubes P1 to P6. The pipes P1 to P6 are identical, so only the pipe P1 will be described.
The front end side light receiving unit 24 removes the end plate 22a for light reception, and uses the pipe end face 24a of the pipe P1 perpendicular to the axial center O1 as the front end light receiving surface, and the pipe end face 24a The second radiation lines FTh are respectively formed. The connection end light receiving unit 25 has the light receiving piece 25a attached by welding or the like only in the vicinity of the irradiation position of the first line Rv and the second line Rh, and the connection end target RT is provided on the surface of the light receiving piece 25a. The first radiation RTv and the second radiation RTh are formed. The first irradiation line RTv and the second irradiation line RTh correspond to the first line Rv and the second line Rh, and are formed on the outer surface of the body of the pipe P1 along the axial center O1 direction in advance. It forms based on BLv and BLh.

  In addition, as shown in FIG. 5, when the light receiving surface of the first line Rv and the second line Rh is present on the outer surface of the connection end side of the already joined pipes P2 to P6 including the reference pipe P0, the reference is The outer surface of any one of the tubes P1 to P6 including the tube P0 is connected to the connection end of the body scribing line BLv, BLh as the connection end light receiving portion 25, and in the first line Rv direction and the second line Rh direction A first radiation ray FTv and a second radiation ray FTh are formed respectively extending.

(Laser beam irradiation adjustment device)
FIG. 6 shows an irradiator adjustment device 31 that supports each of the laser beam irradiators 21A to 21F so as to be adjustable in attitude. The irradiator adjustment device 31 is provided with irradiator support columns 32 erected at predetermined positions on the surface plate 12, such as y-axis and z-axis biaxial movement that intersects orthogonally with each other at 90.degree. It is configured to be able to rotate around three axes: RO axis), y axis, and z axis.

  The irradiator adjustment device 31 moves the laser light irradiators 21A to 21F up and down along the z axis in the vertical direction in a predetermined range along the irradiator support column 32, and the tubes P1 to P5. The y-axis direction moving unit 34 that moves the laser beam irradiators 21A to 21F in the horizontal width direction in the facing vertical plane, and the y axis rotation unit 35 that rotates the laser beam irradiators 21A to 21F around the y axis , Z-axis rotating portion 36 rotating around the z-axis in the vertical direction, and optical-axis rotating portion 37 rotating the laser beam irradiators 21A to 21F around the laser optical axis RO to set the inclination angle β And.

  The moving units 33 and 34 and the rotating units 35 to 37 irradiate the cross line laser beams CR1 to CR6 by reading position data and angle data and performing an operation based on instruction data from a control panel (not shown). Adjustments such as corners and positions are automated. In this case, z-axis position data is input / output to the z-axis direction moving unit 33 based on the erected position data of the irradiator support column 32 on the surface plate 12, and y to the y-axis direction moving unit 34. Axis position data is output. The y-axis rotation angle data is input to and output from the y-axis rotation unit 35, and the z-axis rotation angle data is input to and output from the z-axis rotation unit 34. Rotation angle data is input / output. Therefore, the irradiator support column 32 of each of the laser beam irradiators 21A to 21F is erected at the set position of the platen 12 based on the design data of the tube assembly, and the moving parts 33 and 34 and the rotating parts 35 to 5 are provided. The laser beam irradiator 21A is configured such that the cross line laser beams CR1 to CR6 can be irradiated from the axis center O1 of the tube P1 toward the grid point RP from the laser beam irradiators 21A to 21F by inputting and outputting data to 37. It is possible to set the position and attitude of ~ 21F. Of course, the position and angle can be fine-tuned manually, respectively.

  FIG. 7 is a modification showing the configuration of each rotating part of the irradiator adjusting device, and this irradiator adjusting device 51 has a rotation axis y to be rotated by the rotation part 53 about the y axis and a rotation part about the z axis The rotation axis z rotated by 54 and the laser optical axis RO rotated by the rotation unit 55 around the optical axis are configured to intersect at one point. As a result, in the irradiator adjustment device 31 of FIG. 6, the correction operation is necessary after the angle correction of the laser beam irradiator 21A, but this can be made unnecessary.

(Production method)
Next, a method of manufacturing the pipe assembly 11 using the equipment having the above configuration will be described with reference to FIGS.

[Pipe positioning and joining]
(Laser beam placement process)
A reference pipe P0 is erected at a predetermined position on the platen 12 corresponding to the score point RP. Then, planar view coordinate lines (scored lines) O1h to O6h immediately below the axial centers O1 to O6 of the tubes P1 to P6 in a plan view are drawn from the planar view case RP 'on the surface plate 12 immediately below the score point RP. Then, the irradiator support column 32 is erected at a predetermined position of the planar view coordinate line O1h to O6h, and the laser beam irradiators 21A to 21F are respectively installed on the irradiator support column 32 via the irradiator adjustment device 31; Set the position and tilt angle β. Then, the laser optical axis RO of the cross line laser light CR1 to CR6 of each of the laser light irradiators 21A to 21F is disposed along the axial center O1 to O6 of the pipes P1 to P6 to be joined to the grid point RP of the reference pipe P0. Do. (STEP.1)
(Target formation process)
Barrel score lines BLv and BLh are formed in advance along the direction of the axis O1 corresponding to the first and second lines Rv and Rh on the outer surface of the body of the pipes P1 to P6 to be joined. The first and second irradiation lines RTv of the connection end target RT in which the first and second lines Rv and Rh are respectively irradiated to the connection end side light receiving portions 23 and 25 based on the body marking lines BLv and BLh. , RTh (FIGS. 3 to 5), and the first, second, and third tip targets FT of which the first and second lines Rv and Rh are respectively irradiated to the tip side light receiving portions 22 and 24 of the tubes P1 to P6. The second radiation rays FTv and FTh (FIGS. 3 to 5) are provided. (STEP. 2)
The laser beam disposing step (STEP. 1) and the target forming step (STEP. 2) may be performed in parallel, or one of them may be performed first.

(Positioning process)
The first and second irradiation lines RTv and RTh of the connection end target RT and the first and second irradiation lines FTv and FTh of the tip target FT are sequentially arranged at the joining position with the reference pipe P0 from the pipe P1 The first and second lines Rv and Rh of the cross line laser beam CR1 coincide with the first and second irradiation lines RTv and RTh and the first and second irradiation lines FTv and FTh of the connection end and the tip targets RT and FT, respectively. The positions of the pipes P1 to P6 are adjusted and positioned in order to do so. (STEP.3)
(Bonding process)
The positioned pipe P1 and the reference pipe P0 (and the already joined pipes) are sequentially joined by welding. (STEP. 4)
The positioning step and the joining step are repeated to sequentially join the remaining pipes P2 to P6 by welding. (STEP. 5)
[Measurement and adjustment of joined tubes]
(Strain measurement process)
After the joining of the tubes P1 to P6 to the reference tube P0 is completed, the installation of the tubes P1 to P6 is performed based on the amount of deviation of the first and second irradiation beams FTv and FTh of the tip target FT and the crossline laser beams CR1 to CR6. Measure each accuracy. These deviations are, as shown in FIG. 9, attachment errors on the X axis and Y axis of the cross line laser beams CR1 to CR6 and the first and second irradiation beams FTv and FTh of the tip target FT. (STEP. 6)
The mounting error on the Z axis disclosed in FIGS. 10 and 11 is a value measured by a measuring device other than the laser irradiators 21A to 21F. The tip end sides of the pipes P1 to P6 including the reference pipe P0 are connected to an intermediate connection pipe serving as an intermediate beam via an expansion joint or the like in a later step. For this reason, the mounting error on the Z-axis has a sufficient allowable length, and the error in the range as produced by welding does not cause any particular problem if left as it is. The mounting errors that are problematic here are the mounting errors on the X axis and the mounting errors on the Y axis.

(Strain removal process)
Based on the installation errors on the X and Y axes measured in the strain measurement process, strain removal is selectively performed on all of the target tubes P1 to P6 obtained by the predetermined assembly calculation method. In this distortion removal work, the heating position and heating range in the circumferential direction and the axial direction, the heating temperature, the heating time, and the cooling time are respectively selected and implemented for the target tubes P1 to P6 to eliminate the distortion. (STEP. 7)
(Strain remeasurement process)
After the strain removing step, as shown in FIG. 9, for example, the mounting errors on the X and Y axes of the pipe P5 are remeasured, respectively. (STEP. 8)
Also for the remaining tubes, repeat the strain removing process and the strain re-measuring process, and keep all the tubes P1 to P6 within the allowable range where the installation error on the X and Y axes is minimized, for example, less than ± several mm . (STEP. 9)
[Fixation result of installation error due to distortion removal]
Here, the correction result of the mounting error due to the distortion removal will be described with reference to FIG. 10 showing the state before distortion removal and FIG. 11 after the distortion removal.

In the pipe P5 after joining of the pipes P0 to P6, the mounting error on the X axis before distortion removal was +0.12 mm, and the mounting error on the Y axis was +1.53 mm. After performing distortion removal with this pipe P5 as the distortion removal target, when the pipe P5 is measured again, the mounting error on the X axis is +0.13 mm, and the mounting error on the Y axis is greatly reduced to +0.51 mm. It was confirmed to be within the allowable range of P5.
[Effect of Example 1]
According to the first embodiment, with respect to the tubes P1 to P6 inclined at a predetermined angle with respect to the reference tube P0, the cross line laser beams CR1 to CR6 passing through the critical point RP along the respective axial centers O1 to O6. Positioning the joining pipes P1 to P6 in a short time and with high accuracy by arranging the CR 6 in an inclined state and aligning the first line Rv and the second line Rh with the connection end target RT and the tip target FR respectively it can.

  Further, by arranging the first lines Rv of the cross line laser beams CR1 to CR6 in the vertical plane, the plane view coordinate line O1 h to the plane view coordinate point O1 h on the surface plate 12 where the reference pipe P0 is installed. The irradiator support column 32 is provided upright at a nearby position along O6h, and the first lines Rv of the crossline laser beams CR1 to CR6 are made to coincide with the plane view coordinate lines O1h to O6h to crossline laser beams CR1 to CR6. The inclination around the laser optical axis RO can be set easily and with high accuracy.

  Furthermore, in the front end side light receiving portion 22, the end plate 22a attached to the front end surface of the tubes P1 to P6 or the front end surface 24a perpendicular to the axis centers O1 to O6 allows the cross line laser beams CR1 to CR6 to be The first irradiation beam FTv and the second irradiation beam FTh of the tip target FT corresponding to the one line Rv and the second line Rh can be formed easily and accurately.

  Furthermore, in the connection end side light receiving unit 23, the annular member (connection end detection member) 23a attached to the outer periphery on the proximal end side of the tubes P1 to P6, the light receiving piece (connection end detection member) 25a, and the connection of the tubes P1 to P6 In at least one of the outer surface of the reference tube P0 around the end and the outer surface of the tubes P1 to P5 around the connecting end of the tubes P1 to P6 after bonding, the first line Rv and the second line of the cross line laser light CR1 to CR6 The first irradiation line RTv and the second irradiation line RTh of the connection end target RT corresponding to the line Rh can be easily and accurately formed, and the positioning and posture adjustment of the pipes P1 to P6 can be easily and accurately performed. it can.

  In addition, by using the cross line laser beams CR1 to CR6 which are irradiated while being inclined along the axis of the tubes P1 to P6, the first line Rv and the second line Rh of the cross line laser beams CR1 to CR6, The mounting accuracy of the tubes P1 to P6 can be easily and accurately detected from the positional deviation amount between the first irradiation beam FTv and the second irradiation beam FTh of the front end target FT. Thereby, the strain measurement process, the strain removing process, and the strain re-measuring process can be continuously performed following the bonding process, and the strain removing process and the strain re-measuring process are repeated using the cross line laser beams CR1 to CR6. The highly accurate tube assembly 11 can be manufactured.

[Other positioning method of laser light irradiator]
In the first embodiment, each elevation angle α of the tubes P1 to P6 is determined by the position data of the irradiator support column 32 based on the design data of the tube assembly 11 including the tubes P1 to P6 and the input data to the light receiver adjustment device 31. (180 ° -α) of the laser beam irradiators 21A to 21F to be the same as in the above, and the attitude is adjusted, but the installation method in the case of manually setting the inclination angle β of the laser beam irradiators 21A to 21F Will be described with reference to FIGS. 12 to 13. The same members as those in the previous embodiment are indicated by the same reference numerals and the description thereof is omitted. Further, only the laser beam irradiator 21A and the tube P1 will be described, and since the other laser beam irradiators 21B to 21F and the tubes P2 to P6 are similar, the description will be omitted.
(Installation of laser beam irradiator 21A)
First, a plan view coordinate line (scored line) O1h is formed on the surface plate 12 from the plan view grid point RP ′ and along the axis O1 of the pipe P1. Then, the laser beam irradiator 21A is disposed in the vertical plane including the planar view coordinate line O1 h. First, the irradiator support column 32 is erected at a position separated by a predetermined distance (R0 + R1 + R2 + R3, R1 = 0) from the grid point RP (planar view grid point RP ′). Then, the laser beam irradiator 21A is attached to the height (Rv1 + Rv2 + Rv3) of the cross line laser beam CR1 corresponding to the standing position in the irradiator support column 32. Here, Rv1 is the height from the surface plate 12 to the end surface center P1O of the pipe P1 (height coordinate line HRv in the measurement reference column 41R described later), Rv2 is the measurement reference column 41L described later from the end surface center P1O The height Rv3 corresponding to the elevation angle α up to the height coordinate line HLv at is a height corresponding to the elevation angle α from the height coordinate line HLv to the illuminator supporting column 32.

  Furthermore, the angle of the laser beam irradiator 21A around the laser beam axis RO is adjusted so that the first line Rv of the cross line laser beam CR1 emitted from the laser beam irradiator 21A coincides with the planar view coordinate line O1h. , And irradiate the first line Rv in the vertical direction.

(Installation of measurement standard pillar)
A pair of measurement reference pillars 41L and 41R are provided at predetermined intervals on both sides of the plane view coordinate line O1h of the pipe P1 and at predetermined intervals in the longitudinal direction of the plane view coordinate O1h from the plane view grid point RP ′. Set up on the surface plate 12
Here, in the distance (R0 + R1 + R2 + R3) from the grid point RP (planar view grid point RP ′) to the laser beam irradiator 21A, R0 is the distance from the grid point RP at the planar view coordinate line O1h to the axial center O1 of the pipe P1. Since the measurement reference column 41R is set to coincide with the end surface of the pipe P1 at the planar view coordinate line O1h, R1 = 0. Further, R2 is a distance from the measurement reference column 41R to the measurement reference column 41L at the planar view coordinate line O1h, and R3 is a distance from the measurement reference column 41L to the illuminator support column 32 at the planar view coordinate line O1h is there.

(Formation of height coordinate line)
Then, based on the design data, the distance (R2) along the planar view coordinate line O1h from the tip surface center P1O of the pipe P1 (= the measurement reference column 41R) to the measurement reference column 41L and the laser light irradiator 21A from the measurement reference column 41L The height coordinate line (scored on the facing surface of the laser beam irradiator 21A irradiated with the second line Rh in the measurement reference columns 41L and 41R from the distance R3 along the planar view coordinate line O1h and the elevation angle α of the pipe P1 Line) form HLv and HRv.

(Adjustment of laser light irradiator)
The inclination angle β corresponding to the elevation angle α of the laser beam irradiator 21A is adjusted so that the second line Rh coincides with the height coordinate lines HLv and HRv of the measurement reference columns 41L and 41R.

  According to the above-mentioned procedure, the inclination angle β of the laser beam irradiator 21A can be set with high accuracy even if it is manual, and the cross line laser beam CR1 can be reliably set at the axial center O1 of the tube P1 at the set position Can be irradiated.

  By the way, the laser light irradiator 21F whose elevation angle α shown by a virtual line in FIG. 12 exceeds 70 °, for example, may cause obstacles to the already joined pipes P1 to P5 and make installation of the irradiator support column 32 difficult. . In this case, the laser beam irradiator 21F may be installed using the irradiator support column 32 suspended or supported from the ceiling. In addition, when the second line Rh of the cross line laser beam CR1 is irradiated at an acute angle on the vertical surfaces of the measurement reference columns 41L and 41R, the light receiving width of the irradiation light is expanded, which easily causes an error. Therefore, instead of the measurement reference pillars 41L and 41R, as indicated by phantom lines in FIG. 12, an L having horizontal columns 41HL and 41HR in which a standard line corresponding to the second line Rh is formed on a flat portion (upper surface) The position of the second line Rh is read with high accuracy by installing a measurement reference pillar 41H such as a letter shape or a gate shape, and irradiating the second line Rh of the cross line laser beam CR1 to the flat portion of the horizontal pillars 41HL and 41HR. be able to.

(Further adjustment of other laser light irradiators)
As shown in FIG. 14 instead of FIGS. 12 and 13, a grid point target RPT installed via the support jig 42 at the grid point RP position without installing the pipe P1, and one measurement reference column 41L ( Alternatively, positioning of the laser beam irradiator 21A and adjustment of the elevation angle α of the cross line laser beam CR1 can be performed by means of 41R.

  In the support jig 42, a U-shaped support arm 42c is provided on a vertical shaft 42a erected at a grid point RP via a horizontal rotation fixing mechanism 42b, and the rotation support is fixed in the vertical direction with a horizontal pin at the support arm 42c. A flat target plate 42e is provided via a mechanism 42d, and a grid target RPT is formed on the surface of the target plate 42e. Thereby, cross line laser beams CR1 to CR6 from all directions can be made to face with a simple structure.

  By using the cross line laser beam of the above manufacturing method, it is possible to accurately position or measure not only the tube but also a columnar structure attached in an inclined state from the structure.

P0 Reference tube (columnar)
P1 to P6 tube (columnar body)
O0 to O6 axial center O1h to O6h planar view coordinate line RP grid point RP ′ planar view point P1O tip surface center CR1 to CR6 cross line laser beam RO laser optical axis Rv first line Rh second line FT tip target FTv first Irradiation ray FTh 2nd irradiation ray RT connection end target RTv 1st irradiation ray RTh 2nd irradiation ray α elevation angle β inclination angle 11 tube assembly (wall structure)
12 Plate (standard horizontal plane)
21A to 21F Laser light irradiators 22, 24 Tip side light receiving part 22a End plate 24a Tube end face 23, 25 Connection end side light receiving part 23a Ring member 25a Light receiving piece 31 Irradiator adjustment device 32 Irradiator support column

Claims (5)

A point at which a plurality of pillars extending in a slanting direction are separated at a predetermined angle from a point of a reference pillar using a cross line laser beam consisting of a first line and a second line orthogonally crossing on the optical axis A method of manufacturing a grid structure for manufacturing a structure, comprising:
A laser beam arrangement step of arranging the optical axis of the cross line laser beam from the axial center of the columnar body toward the grid point;
A connection end target corresponding to each of the first line and the second line is provided on the connection end side of each columnar body, and an end target corresponding to each of the first line and the second line is provided on the distal end side of each columnar body Target formation process,
The columnar body on which the connection end target and the tip target are formed is disposed at a junction position with the reference columnar body, and the columnar body is matched so that the cross line laser light matches the connection end target and the tip target. Positioning process to adjust the position of
And a bonding step of sequentially bonding the positioned columnar bodies to the reference columnar body. The method for manufacturing a grid structure according to claim 1, wherein the first line of the cross line laser light is disposed in a vertical plane. The method for producing a grid structure according to claim 1 or 2, wherein the tip target is formed on an end face of the columnar body or an end plate attached to the distal end face of the columnar body. The connection end target is formed on the connection end detection member attached to the outer periphery on the proximal end side of the columnar body, or on at least one of the surface of the reference columnar body around the connection end of the columnar body and the surface of the columnar body after bonding A method of manufacturing a grid structure according to any one of claims 1 to 3, characterized in that. A distortion measurement step of measuring the mounting accuracy of the columnar body from the displacement amount between the tip target and the cross line laser light after joining all the columnar bodies to the reference columnar body;
A distortion removing step of removing distortion of the columnar body by partially heating and cooling the predetermined columnar body measured in the distortion measuring step;
The strain re-measuring step of re-measuring the attachment accuracy of the columnar body from the deviation amount between the tip target and the cross-line laser light after the distortion removing step. Production method.

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