JP2002224831A - Method and device for assembling structural steelwork - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the welding efficiency by shortening the crane waiting time and its service time when assembling a steel work, reducing the set time on a rotating machine, and keeping the welding position to be constantly flat. SOLUTION: When assembling the steel work, a beam is held by using the ring-like rotating machine in a horizontal condition, and the beam is rotated and revolved as a rotary shaft in the small assembly. The beam is held and revolved, and a column is welded in a flat position using large current with the same ring-like rotating machine as that in the small assembly used in a perpendicular position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for assembling building steel structures.

[0002]

2. Description of the Related Art Conventional methods of assembling a steel frame include a method of manually turning over and reversing a small assembly and a large assembly using a crane, and preferentially manufacturing columns and dice using a rotating machine in the small assembly. And a method in which the column is rotated using the column as a rotation axis, and the beam around the column is rotated.

[0003] A conventional ordinary method is performed in the following procedure. That is, in the case of a penetrating beam-type building steel frame using a box column made of a square steel pipe, as shown in FIG. It is manufactured by welding 3. Then, as shown in FIG. 2, the flange 5 at the end of the H-shaped steel beam 4 is brought into contact with the edge of the diaphragm of the die, welding 3A at two places of the diaphragm 2 and the flange 5, and the central surface of the column 1 and the web 6 Is performed by welding 3A at two locations on the front and back, for a total of four locations. If four beams are attached to the dice, welding at 16 locations is required. Then, first, a steel frame core composed of columns and beams is assembled. The situation of such a small assembly is the same for the column-piercing steel frame using the square steel pipe shown in FIG. 3 and the column-piercing steel frame using the H-section steel shown in FIG. After this, FIG.
As shown in the figure, after assembling the beam / column, the steel core 10 is set upright and abutted against the column, and after partially performing tack welding,
The column is gripped and rotated 12 about the column to perform tack welding and joint welding 11 between the column 9 and the steel frame core to perform large-scale assembly of the steel frame. This large assembling operation is performed manually using a crane or automatically using a rotating machine.

In another conventional case, the following procedure is performed.
That is, in the case of a beam penetrating type steel frame using a box column of a square steel pipe, as shown in FIG. 6, first, a square steel pipe column 9, a diaphragm 2, and a short rectangular steel pipe 1 are combined to reduce only columns used in a large assembly. Completed by assembling, and then H-beam 4
After contacting with the diaphragm of the column and performing tack welding, joint welding is performed while rotating the column as an axis, and a large steel assembly is performed. This method is also called a column method.

[0005]

In the conventional method in which the steel core is first assembled, the upper surface of the H-section steel is assembled while the steel core is assembled, as shown in FIGS. 2, 3, 4 and 5.・ In order to perform stable downward welding in order to weld the lower surface and side surfaces, it is necessary to turn over and turn over a large steel frame member between the beam and the dice with a crane, etc. every time. This leads to reduced efficiency. Further, even if the small assembling and the large assembling are performed using different machines, it is a different type of machine, so that it takes time to reset the assembly members for each of the small assembling and the large assembling processes.

Further, in the conventional column method, as shown in FIG. 6, an H-shaped steel beam 4 is connected to a short rectangular steel pipe 1 which is a part of a column.
When performing temporary welding by contacting the H-shaped steel beam, the work is performed in the air, so it is difficult to secure the mounting accuracy of the H-beam 4 such as surface accuracy, angular accuracy, and dimensional accuracy. ,
Welding of columns and beams requires horizontal welding and vertical welding in addition to downward welding, so highly difficult welding technology is required.In horizontal welding and vertical welding, a larger welding current is used than in downward welding. There is a problem that welding efficiency is reduced due to the inability to perform welding.

SUMMARY OF THE INVENTION It is an object of the present invention to improve the efficiency of welding by reducing the waiting time of a crane and the time for using the same when assembling a steel frame, reducing the time and labor required for setting the rotating machine, and keeping the welding position always downward. It is to make it.

[0008]

SUMMARY OF THE INVENTION In assembling a steel frame according to the present invention, a beam is rotated and revolved around a beam in a small assembly by using a rotating machine for assembly. It is holding and rotating the beam. In addition, the same rotary machine can be used from small assembly to large assembly.

[0009] In assembling beams or pillar-piercing building steel frames of a building steel structure, the position and direction of the welded part of the building member, the position and direction of the rotating shaft of the three-dimensional member and the assembling sequence, the welding robot method, operation, As a result of extensive research on the position, etc., we found a shaft rotation that can be welded in a fixed position and always in a downward position in the procedure for assembling a steel core. That is, claim 1
In the invention according to the present invention, when carrying out tack welding or joint welding of a steel core, as shown in FIGS. 2 and 7, one of the beams 4 orthogonal to each other or two on the same line is used as a horizontal axis. It consists of holding and rotating the beam 4H, that is, rotating the beam 4H, and rotating the dice 8 adjacent to the beam and the other beam orthogonal thereto.

According to the second aspect of the present invention, as shown in FIG. 9, in the first aspect of the present invention, one or two of the beams 4 orthogonal to each other are rotated about a horizontal axis, that is, a rotation operation 18 is performed. The operation of rotating the beam to be rotated as the horizontal axis around the column position on the horizontal plane, that is, the revolving operation 20, is alternately or simultaneously performed.

In the apparatus according to the third aspect of the present invention,
7. The method according to claim 1, wherein the dice shown in FIG.
Alternatively, beams 4 orthogonal to each other are temporarily welded around a part 1 of the column shown in FIG. Bearing 1 with rod 14
5, the dice 8 adjacent to the beam 4H or the other beam 4 orthogonal to the beam 4H are rotated by rotating the horizontal axis, thereby performing joint welding between the beam 4 and the dice 8 in a downward position. It consists of a device that makes it possible.

In the apparatus according to a fourth aspect of the present invention, in the apparatus according to the third aspect, as shown in FIG. A bearing 15 for connecting and receiving the connecting rod 14 is installed at the tip of the connecting rod 14, and then, as shown in the top view of FIG. 10 and the cross-sectional view of FIG. 25, the connecting rod 14 is driven to rotate 18 to rotate the beam 14H, that is, to rotate, and the driving wheel 21 or 19 is brought into contact with the side surface or the lower surface of the ring 25 so that the ring 25 is placed on a horizontal plane. In other words, the apparatus comprises a device for manufacturing the steel core 10 by the method described in claim 2.

In the apparatus according to a fifth aspect of the present invention, as shown in FIGS. 9 and 10, a welding robot 22 is installed in the vicinity of the apparatus according to the fourth aspect, and a rotation axis 1 of the horizontal axis of the apparatus is provided.
8 and a horizontal axis revolving motion 20 that rotates on a horizontal plane are alternately or simultaneously performed, and welding is always performed in a downward position in front of the welding robot 22, and the welding operation is performed in synchronization with the rotation of the device. It is configured.

In the apparatus according to the sixth aspect, as shown in FIG. 12, a plurality of the apparatuses according to the fourth aspect are installed vertically and parallel to each other while holding the steel core 10 on the rotating ring 24. The pillars 9 are horizontally installed between the steel cores 10 or outward on the extension, and the steel cores 10 and the pillars 9 are temporarily attached to each other, and the rings 24 holding the steel cores 10 are simultaneously rotated on the vertical plane. , And a device that performs robot welding or manual welding in synchronization with the ring rotation 27.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the first embodiment, when assembling beams or pillars of a building steel structure, when performing temporary welding or joint welding of a steel core, as shown in FIGS. By gripping and rotating the beam 4H with one of the beams 4 orthogonal to each other or two on the same line as the horizontal axis, and rotating the dice 8 adjacent to the beam and the other orthogonal beam,
The beam and the dice 8 are all welded in a downward position and the steel core 10 is welded.
Can be manufactured. In addition, as shown in FIG. 3, in a column-penetrating steel core 10 using a square steel pipe,
If the beam 4 is used as the rotation axis, all of the temporary welding and the joint welding of the attachment of the inner diaphragm inscribed in the column to the column can be performed in the downward posture. Further, as shown in FIG. 4, even in the column-piercing type steel core 10 using the H-section steel, if the beam 4 is used as the rotation axis, the tack welding and the joint welding of the beam 4 and the column 7 are all downward. Welding is possible. In this way, if the beam 4 is used as a rotation axis, welding can be performed in a downward attitude, and if the shaft of the beam 4 is rotated by an electric or hydraulic motor, a crane becomes unnecessary.

According to the second aspect of the present invention, as shown in FIG. 9, in the first aspect of the present invention, one or two of the beams 4 orthogonal to each other are rotated about a horizontal axis.
8 or rotation operation of the beam to be rotated as the horizontal axis around the column position on the horizontal plane, ie, revolving operation, alternately or simultaneously. The welding position can be set to a position where welding is possible, and the revolving operation of the horizontal axis beam can direct the welding position to the desired direction. Therefore, the welding position in the downward position can be brought to the front as viewed from the side to be welded. . Therefore, the steel core 10 can be manufactured by always welding the welding portion 23 between the beam and the dice or the column and the inner diaphragm in the downward posture in the front without moving the position 22 on the welding side. If these movements and movements are performed automatically, it is possible to perform welding in the best frontal direction and in the best downward position without using a crane, and it is possible to perform stable, defect-free and highly efficient welding work. .
In the conventional method, the steel core 10 is manufactured by frequently using a crane manually as shown in FIG. 5, or by tack-welding difficult beams using a crane as shown in FIG.
Compared to manufacturing a steel core by gripping the column and rotating the column, in the present invention, the set of beams is temporarily welded on a surface plate that can easily and accurately obtain flatness, angular accuracy, and dimensional accuracy. There is novelty in that the beam is held, the beam is rotated or rotated, and the beam is revolved around the column position on a horizontal plane while holding the beam to be further rotated. In addition, in the conventional method, there is no apparatus that enables welding of beams in a downward posture by combining rotation and revolution as in the present invention.

According to a third aspect of the present invention, in the method of the first aspect, in the assembling of the beam penetrating type building steel frame using the square steel pipe for the column, as shown in FIG. 4 is temporarily welded, one of the beams 4 or two on the same line, that is, the beam 4H is used as a horizontal axis, the end of the beam is connected to a connecting rod 14, and the connecting rod 14 is held by a bearing 15; If a device for rotating a dice 8 adjacent to the beam 4H or another beam 4 orthogonal to the beam 4H by installing a stand 16 for supporting the beam 4H and rotating the horizontal axis is used,
The joint welding between the die and the die 8 can be performed in a downward posture. If the shaft of the beam 4 is rotated by an electric or hydraulic motor for this rotation drive, a crane becomes unnecessary. In this case, either of the temporary welding of the beam 4 and the operation of connecting the end of the beam to the connecting rod 14 may be performed first.

According to a third aspect of the present invention, in the method according to the first aspect, in assembling the column-penetrating steel frame using a square steel pipe for the column, as shown in FIGS. The beams 4 which are orthogonal to each other and are centered are temporarily welded, and one end of the beams 4 or two on the same line, that is, the beam 4H is used as a horizontal axis, and the ends of the beams are connected to the connecting rods 14 to support the connecting rods 14 A stand 16 for supporting the bearing 15 is installed, and the horizontal axis is rotated, so that the column 1 adjacent to the beam 4 is held.
If a device for rotating a part of the beam 4 or another beam 4 orthogonal to the column 4 is used, the joint welding between the beam 4 and the column 1 or between the inner diaphragm 7 and the column 1 can be performed in a downward posture. If the shaft of the beam 4 is rotated by an electric or hydraulic motor for this rotation drive, a crane becomes unnecessary. In this case, either of the temporary welding of the beam 4 and the operation of connecting the end of the beam to the connecting rod 14 may be performed first.

According to a third aspect of the present invention, in the method of the first aspect, it is the same as in the case of using a square steel pipe for the column in assembling the column penetration type steel frame using the H-section steel for the column. It can be easily understood from FIG.

According to the first to fourth aspects of the present invention, as shown in FIGS. 7 and 8, instead of using a bolt hole in the web at the end of the beam, as shown in FIGS. In addition, the use of bolt holes in the flange or the use of a bolt, an electromagnetic clamp, a vacuum clamp, a one-touch clamp, or the like to hold the entire beam end has a similar effect.

In the apparatus according to the fourth aspect of the present invention, in the apparatus according to the third aspect, as shown in FIG.
One or two on the same line as a horizontal axis, connecting the beam end to the connecting rod 14, and a bearing 15 for receiving the connecting rod 14
Is installed at the tip of the connecting rod 14, and then, as shown in the top view of FIG. 10 and the cross-sectional view of FIG. 11, the bearing 15 is installed horizontally and the inner rotating ring 25 is rotatable on a horizontal plane. The beam 14H is rotated or rotated by rotating the connecting rod 14 by rotating the connecting rod 14 so that the driving wheel 21 is driven by an electric motor or a hydraulic motor mounted on the outer rotating ring 26 on the side or lower surface of the inner rotating ring 25. Alternatively, the inner rotating ring 25 is rotated and driven, that is, revolves, on the horizontal plane by bringing the inner rotating ring 25 into contact with the inner rotating ring 25, thereby manufacturing the steel core 10 by the method according to claim 2. In the conventional method, the steel core 10 is manufactured by frequently using a crane manually as shown in FIG. 5 or by tack-welding difficult beams using a crane as shown in FIG. Compared to making a steel core by gripping and rotating the pillar,
According to the present invention, the beam is set by tack welding on a surface plate that can easily provide flatness and angular accuracy, and the beam is gripped and the beam is rotated or rotated. The point is that the beam revolves around the center.

In the apparatus according to the fourth aspect of the present invention, when the number of beams of the steel core to be assembled is one as shown in FIG. 14 and in the case of two as shown in FIG. Using the dice 8 and the connecting rods 14, bolts,
If it is gripped by an electromagnetic clamp, a vacuum clamp, a one-touch clamp, or the like, it is possible to assemble the steel core in the same manner as three or four beams of the steel core.

In the invention according to claim 5, FIGS.
As shown in the figure, a welding robot 22 is installed in the vicinity of the apparatus according to claim 4, and the rotation 18 of the horizontal axis of the apparatus and the revolution 20 of the horizontal axis on a horizontal plane are alternately or simultaneously performed, and the rotation axis is rotated. It is detected that the welding position of the target beam 4 has come to the downward posture position by an encoder that detects the rotation angle of the rotation 18 with respect to the rotation 18 or a contact detector of the beam or a limit switch. By measuring the rotation angle of the inner rotation ring 25 shown in FIG. 11 with an encoder, or by detecting the direction of the beam 4 as an object by using a contact detector or a limit switch on the beam 14 or the connecting rod 15. A device that detects that the welding point has come to the front of the welding robot, and operates in synchronization with the welding operation and the rotation of the device so that welding can always be performed in a downward position in front of the welding robot 22. That. Thus, if the welding machine is mounted on the robot and the welding position / direction control is synchronized with the operation of the robot and the welding machine, a healthy welding joint can be obtained efficiently by downward welding without using a crane.

In the apparatus according to the sixth aspect of the present invention, the apparatus according to the fourth aspect as shown in FIG. 11 is vertically and mutually connected while the steel core 10 is held on the rotating ring 24 as shown in FIG. A plurality of columns 9 are installed in parallel, and columns 9 are installed horizontally between the steel cores 10 or outward on the extension, and
After adjusting the distance, parallelism, height, beam orientation, and column position / orientation, the steel core 10 and the column 9 are temporarily attached, and the ring 24 holding the steel core 10 is placed on a vertical surface. This device is capable of performing robot welding or manual welding in a downward posture while standing up and rotating the inner rotating ring 25 while synchronizing with the ring rotation 27. In the device according to the present invention, the steel core 10
Adjustment of the distance, parallelism, height, beam orientation, and column position / azimuth is performed by placing the rotating ring 24 on which the steel core 10 is mounted on a trolley capable of moving on rails, as shown in FIG. Is also effective. In this case, the outer shape of the outer rotating ring shown in FIG. 11 may be not a round shape but a polygonal shape so that it can be easily set up vertically. Furthermore, if the welding machine is mounted on the robot and the operation of the robot and the welding machine is synchronized with the welding position / direction control / rotation speed in the apparatus of the invention according to claim 6, a crane is not required and a sound welding joint can be obtained by downward welding. Can be obtained with high efficiency, which is more effective.

The effects of the present invention are as follows as compared with the conventional method. 1. In the production of steel frame cores, welding can be performed in all downward positions, and high quality and high efficiency welding can be performed. 2. In the manufacture of a steel core, welding can be performed with the welding robot in a fixed position and in a downward position, and in this case, high-quality and high-efficiency welding can be performed. 3. Crane waiting time and use time can be reduced. 4 Since the same device can be used consistently from small assembly to large assembly, the time for attaching and detaching the steel frame member can be saved. 5. High production accuracy of small and large steel core assemblies. 6. Since the posture during small assembly of the steel core can be changed freely, testing and inspection during manufacture is easy.

[Brief description of the drawings]

Fig. 1 Dice in beam-piercing building steel frame

FIG. 2 Steel core welded with dice, H-beams

FIG. 3 is a steel core welded to a column-penetrating steel frame using a rectangular steel pipe and an H-shaped steel beam.

[FIG. 4] A steel column core welded to a column-penetrating steel frame using an H-section steel and an H-section steel beam

FIG. 5 shows a conventional method of assembling a steel frame.

FIG. 6 is an assembling procedure using a conventional column method.

FIG. 7 shows an assembling method and apparatus for a beam penetrating type steel core using a rectangular steel pipe as a column by a method of gripping and rotating, ie, rotating, a beam.

FIG. 8 is an assembling method and apparatus for a method of gripping and rotating, ie, rotating, a beam with respect to a column-penetrating steel core using a square steel pipe as a column.

FIG. 9 shows a method of combining the operation of rotating or rotating the beam as a horizontal axis of the steel core and the operation of rotating or revolving the beam to be rotated as the horizontal axis around a column position on a horizontal plane.

FIG. 10 shows an apparatus that combines an operation of rotating or rotating the beam as a horizontal axis of a steel core and an operation of rotating or revolving the beam to be rotated as a horizontal axis around a column position on a horizontal plane.

FIG. 11 is a cross-sectional view of a device that combines an operation of rotating or rotating the beam as a horizontal axis of a steel core and an operation of rotating or revolving the beam to be rotated as a horizontal axis around a column position on a horizontal plane.

FIG. 12 is a three-dimensional view in which a large assembling of a steel frame core is performed by gripping a beam and performing an operation of revolving the beam around a column in a vertical plane.

FIG. 13 shows a procedure for performing a small-to-large assembly of a steel core using the method and the apparatus according to the present invention.

FIG. 14 is a top view of the assembling method when the steel core has one beam.

FIG. 15 is a top view of the assembling method when the steel core core has two beams.

FIG. 16 is an external view of an apparatus for assembling a steel core using a minecart by the method according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Part of pillar which cut rectangular steel pipe with short rectangular steel pipe 2 Diaphragm 3 Welded part of rectangular steel pipe and diaphragm 3D cut 3A Welded dice and H-shaped steel beam 3B Square steel pipe column and H-shaped steel beam Welding of 3C H-shaped steel column and H-shaped steel beam 4 H-shaped steel beam 4A H-shaped steel column 4D H-shaped steel beam of dummy 4H H-shaped steel beam to be horizontal axis 5 H-shaped steel flange 6 H-shaped Steel web 7 Inner diaphragm inscribed and attached to rectangular steel pipe 8 Dice 9 Pillar 10 Steel core 11 Welding of pillar and steel core 12 Rotation around pillar 13 Welding of pillar and diaphragm 14 Connecting rod of beam and bearing 14 15 Bearing 17 Stand 18 Operation for rotating or rotating as a horizontal axis 19 Lower guide roller or driving wheel 20 Operation for rotating or revolving a beam to be rotated as a horizontal axis around a column position on a horizontal plane 2 In general term for lateral guide rollers or drive wheels 22 welding portion 24 rotating ring of the welder or welding robot 23 in construction, comprises an inner rotating ring 25 and the outer rotating ring 26. 25 inner rotating ring 26 outer rotating ring, the outer shape of which is circular or polygonal. 27 Operation to grip the beam and revolve the beam around the column center on the vertical plane 28 Dolly 29 Rail

Claims (6)

[Claims] When assembling a beam of a building steel structure or a column-piercing building steel frame, when performing tack welding or joint welding of a steel core, one or two of the beams orthogonal to each other are set as a horizontal axis. A method of manufacturing a steel core by welding a steel member in a downward position by rotating the beam and rotating a dice adjacent to the beam and another beam or column orthogonal to the beam. 2. The operation according to claim 1, wherein one or two of the beams orthogonal to each other are rotated about a horizontal axis, and the beam rotated as a horizontal axis is revolved around a column position on a horizontal plane. By alternately or simultaneously performing a method of manufacturing a steel core by welding a steel member in a downward position, 3. The method according to claim 1, wherein beams orthogonal to each other around a part of the dice or the column are tack-welded, and one or two of the beams are set as a horizontal axis and the beam ends. By connecting the connecting rod to the connecting rod, holding the connecting rod with a bearing, and rotating the horizontal axis, thereby rotating the dice adjacent to the beam or another beam orthogonal to the beam, in a downward posture of the beam and the dice. For manufacturing a steel core that enables joint welding of steel 4. The apparatus according to claim 3, wherein one or two of the beams are connected to a connecting rod with one or two of the beams being horizontal axes, and the bearing for receiving the connecting rod is attached to a horizontally installed ring. By rotating the connecting rod to rotate the beam, the ring and the horizontal axis revolve on a horizontal plane by bringing a driving wheel into contact with a side surface or a lower surface of the ring,
An apparatus for manufacturing a steel core by the method according to claim 2. 5. The welding robot according to claim 4, wherein a welding robot is installed in the vicinity of the apparatus, and the rotation of the horizontal axis of the apparatus and the revolving of the horizontal axis on a horizontal plane are alternately or simultaneously performed. A device that always performs welding in the downward direction on the front and operates in synchronization with the welding operation and the rotation of the device. 6. The device according to claim 4, wherein a plurality of the devices are installed vertically and parallel to each other while holding the steel core, and columns are installed horizontally between the steel cores or in the outward direction. A device that performs temporary welding and robot welding while rotating the ring that holds the steel core on a vertical plane while synchronizing with manual welding or ring rotation.