JP2590923Y2 - Positioner for joint welding and its jig - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioner and a jig for use in connection welding, and more particularly to a steel connection (hereinafter referred to as a steel connection or connection) which is a joint between a column and a beam of a building. The present invention relates to a positioner for holding a connection or a column thereof to facilitate welding work when automatic welding is performed at a factory.

[0002]

2. Description of the Related Art In general, a steel joint in which an H-shaped steel serving as a connection portion with a beam is welded to the side surface of a column formed of an iron square pipe or the like joined to the column at a connection portion between a column and a beam of a building. Is used. Such steel joints are often welded in advance at the factory, in which case, H-shaped steel is temporarily welded to the column, and firstly, the main weld of the welding location on the upper surface of the joint is performed. The connection is lifted upside down with a crane and the main part is welded on the other side.

[0003] Such a crane lifting method involves a danger in work and it is difficult to invert the connection in a narrow place. Therefore, a positioner as disclosed in JP-A-63-137597 has been proposed. I have. This positioner has an H along one axis in a cross-shaped connection.
Fixing jigs are attached to both ends of the die steel, and these jigs are chucked to be rotatably held and rotated by a motor. Japanese Utility Model Laid-Open Publication No. Sho 62-10987 proposes a structure in which a connection is cantilevered so that it can be swung up and down and rotated.

[0004]

However, the former positioner, which supports both ends, has a drawback that it cannot cope with various kinds of connections. That is, when the shape of the connection is not a cross but an L-shape, it cannot be held by the positioner having the both-ends supporting structure, and therefore, it is necessary to attach a dummy beam, which greatly deteriorates the workability. In addition, there are cases where the beam portion of the connection is not straight, which requires a work for matching the rotation axis with the axis of the connection, and thus has a disadvantage that a large amount of work time is required. Furthermore, since the distance between the beam and the positioner perpendicular to the longitudinal direction of the connection is restricted by the length of the longitudinal beam, the working range of the robot cannot be used effectively depending on the shape of the connection, making welding impossible. Also occur in some places.

Further, in the case of the conventional cantilever positioner, only the reversing work of the connection to be supported can be automatically performed, but the welding work is presumed to be performed manually.
There is a disadvantage that the accuracy of supporting the connection is very poor, and in particular, a moment in the longitudinal direction of the workpiece is received, so that the accuracy is not sufficient. Further, when the size of the H-shaped steel of the connection beam is changed, it is necessary to slide the gripping claws for each connection to adjust the interval, and since the target connection weight is large, the gripping claws are slid. The guide has a drawback that the galling phenomenon easily occurs. In addition, crane operation is performed so that the entire end face of the beam is pressed against the gripping claw means when setting the connection with the crane, and the fixing bolts provided on the claw means are manually tightened, making crane operation extremely difficult In addition, there is a problem that the crane is restrained until the fixing bolt is completely tightened. In other words, since many operations up to gripping the connection depend on humans, there is a disadvantage that the accuracy of holding the connection and the reliability are lacking, and a long operation time is required.

The present invention focuses on the above-mentioned conventional problems, and can be adapted to a variety of shapes of the connection, and can easily perform the connection / removal operation of the connection without requiring ancillary work such as axis alignment work. It is an object of the present invention to provide a positioner for joint welding, which can be carried out, can easily carry in and carry out the joint, and can hold the joint with extremely high accuracy.

[0007]

In order to achieve the above object, a positioner for joint welding according to the present invention is provided with a horizontal axis on an upright frame, and is capable of swinging about the axis of the horizontal axis.
And a horizontal swing frame
Provide a rotating member that can rotate around the axis of rotation perpendicular to the axis
Elevation allows rotation member Te, and rotatably and be Rutotomoni, the clamping means having a difference filled-plurality of gripping arms which can be clamping by the T-shaped cross section corners of Joint H-section steel beam to the rotating member provided it, this clamping means is constructed by attaching with a reasonable amount of eccentricity from the rotational axis of said rotary member.

[0008] In this case, the gripping arm of the clamp means comprises a fixed gripping arm that is inserted into the corner formed by the flange portion and web portion of the H-shaped steel beams, are contact and separation driving respect to the fixed gripping arm fixing the flange portion and web portion between the gripper arm also has good a structure provided with the movable gripping arm which enables clamped to. Further, it is preferable that the movable gripping arm of the clamping means has a hydraulic cylinder mechanism for applying a clamping force and is rotatably attached to the fixed gripping arm by a pin. Furthermore, the clamping means is attached to the rotating member.
Attached to each other along two intersecting axes of the rotating members.
It has a plurality of gripping arms that can be driven toward and away from
It is preferable that one axis of the bone connection can be held by cantilever.

By the way, it is preferable to prepare a jig for welding a column with the above-described position welding positioner having the following structure. That is, the jig has a configuration in which a gripped portion gripped by the gripping arm of the clamp means of the position welding positioner is provided on one side and a column clamp means is provided on the other side.

[0010]

According to the construction of the positioner for connection welding,
In the connection, the gripping arm of the clamping means is inserted into the end surface of the beam member, particularly at the T-shaped cross section, so that each surface of the intersection formed by the flange portion and the web portion can be sandwiched.
Since the clamp means is eccentrically attached to the rotating member, the clamp can be held so that the beam center line is on the rotation center side, so that the amount of height displacement can be reduced even when rotated. Since the displacement amount of the height and the left and right offset is a default value, it is sufficient to adjust the height or the left and right offset at the time of welding by the automatic welding robot, and the centering of the rotation axis and the connection axis is performed. It is possible to perform welding in a cantilever position without performing.

[0011] By attaching the rotating member to the swing frame, the rotating shaft center can be lowered, thereby facilitating the work of mounting the connection without imposing a load on the crane. In addition, since the gripping arm of the clamping means is composed of the fixed gripping arm and the movable gripping arm facing the fixed gripping arm, the port beam can be always held at a fixed position using the fixed gripping arm as a guide. Thereby, the displacement amount at the time of rotation of the connection can always be kept constant, so that the correction of the welding operation becomes easy. Further, since the movable gripping arm is rotatably attached to the fixed gripping arm by a pin, the reaction force holding the joint beam portion is not received as a bending force at the base end portion of the arm body, It can be received as a compressive or internal force acting between the base end of the arm and the fixed gripping arm. Thereby, even if the cross-sectional area of the gripping arm is relatively small, a large connection can be held.

Next, according to the configuration of the jig for the joint welding positioner, the jig welding positioner grips a gripped portion on one side of the jig holding the column on the other side. As a result, the column can be gripped.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the positioner for joint welding according to the present invention will be described below in detail with reference to FIGS.

FIG. 1 is a perspective view of a positioner for joint welding according to an embodiment. In this embodiment, the connection 10 shown in FIG. 3 is gripped in a cantilevered state so that a welding operation by a welding robot (not shown) can be easily performed. Connection 1
No. 0 is to weld an H-shaped steel 18 serving as a connecting portion with a beam to each of the four side surfaces of the column 16 in which the diaphragm 14 is joined and integrated to both end surfaces of the square pipe 12 joined to the column in a cross shape. Composed of Such a connection 1
0, the upper surface diaphragm 14U and the upper surface H
Joints Y1 to Y4 with the mold steel flange 20U and joints Y5 with the lower diaphragm 14L and the H-shaped steel flange 20L.
Y8, the front H-section steel web 22F, the left H-section steel web 22L, and the rear H-section steel web 22B, and the square pipe 1
2, a front H-shaped steel web 22F, a right H-shaped steel web 22R,
And, it is a joint portion Y13 to Y16 between the rear H-shaped steel web 22B and the side surface of the square pipe 12. Such a connection 10 is carried in by a crane or the like in a state where key points are temporarily welded by hand welding or the like and temporarily assembled, and attached and held in the embodiment.

As shown in FIG. 1, the embodiment has a fixed base 24 installed on the floor, and a vertically standing upright frame 26 is integrally formed at one end of the fixed base 24. Is provided. Such a standing frame 26 is provided with a swing frame described later, and a rotating disk 28 for rotating the holding frame 10 as a member to be welded is mounted on the swing frame. .
The rotary disk 28 is rotatable by a rotary drive source provided inside the swing frame, and can be fixed at an arbitrary angle. Then, a clamp device 30 is attached to the rotating disk 28.

FIGS. 4 and 5 show details of the clamp device 30. FIG. As shown in these figures, the clamping device 3
0 is the base plate 3 attached to the rotating disk 28
2 that form the beam portion of the connection 10 shown in FIG.
Three arms 341 to 343 for holding in a state of being inserted into the end of the mold steel 18 are attached in a state of extending vertically from the surface of the base plate 32.

First, the first gripping arm 341 is
In order to function as a fixed guide arm for positioning one corner portion formed by the flange 20 of the H-section steel 18 at 0 and the web 22, the base plate 32 is fixedly projected at a fixed position. For this reason,
The first gripping arm 341 is provided with a web contact surface 36W and a flange contact surface 36F, and these are brought into direct contact with the corner portion of the H-shaped steel 18 so as to determine the holding position. The second gripping arm 342 is disposed horizontally opposed to the first gripping arm 341, and
Is pressed as another corner formed by the flange 20 of the H-shaped steel 18 and the web 22 so that the web 22 can be clamped.
Further, the third gripping arm 343 is arranged so as to be able to press the outer surface of the flange 20 of the H-shaped steel 18 orthogonally to the direction of clamping by the first and second gripping arms 341 and 342, whereby the flange 20 is moved. The gripping arm 341 is pressed against the upper surface, that is, the flange contact surface 36F.

Incidentally, the second and third movable gripping arms 342 and 343 for pressing and holding the H-shaped steel 18 against the first gripping arm 341 are provided with a hydraulic cylinder mechanism. The two hydraulic cylinders 38 are arranged side by side in a direction perpendicular to the plane of the base plate 32 so that they can be pressed and held at two points in the longitudinal direction of the connection 10. That is, the movable mechanism of the second and third gripping arms 342 and 343 is the hydraulic cylinder 38.
, And the connection 10 is pinched or released by its stroke. Further, the second and third gripping arms 342 and 343 are provided in FIG.
As can be understood from (2), a bracket 42 fixed to the base plate 32 and integrated with the base end of the first fixed gripping arm 341 is swingably attached via a pivot pin 44. I have. The pivot pin 44 is set at a position near the pressing surface on the base end side of each of the second and third gripping arms 342 and 343, and the second and third gripping arms 342 and 343 are caused by the reaction force of the gripping force. It is made to rotate. A reaction force receiving block 46 is provided between the second and third gripping arms 342 and 343 and the base plate 32 side bracket 42 so as to support the reaction force due to the moment about the pivot pin 44 caused by the gripping by the bracket 42. Is interposed.

The rotating disk 28 in the above embodiment is similar to that shown in FIG.
As shown in detail in FIG. 2, the swinging frame 48 is attached to the upright frame 26. The swing frame 48 is formed in a front U-shape, and the rotating disk 28 is arranged so as to cover the U-shaped groove portion. A ring bearing 5 as shown in FIG.
The inner race 52 of the ring bearing 50 is fixed.
, The outer race 54 is fixed to the swing frame 48. And inner race 52
A ring gear surface 56 is formed on the inner peripheral surface of the gear, and a pinion gear 60 of a drive motor 58 installed in the swing frame 48 meshes with the ring gear surface 56. Therefore, the rotating disk 28 is driven to rotate by the driving motor 58 and can be stopped at an arbitrary position.

The swing frame 48 has the upper ends of the arms on both sides thereof attached to the upright frame 26 via swing pins 61. The swing pin 61 is set to be orthogonal to the rotation axis of the rotating disk 28, and the rotation axis can be lowered by the swing of the swing frame 48. For this reason, when attaching the port 10 to the clamp device 30, the clamp holding arm 34 is turned upward so that the beam portion can be easily received even when the port 10 carried by the crane is inclined. . In this case, the swing frame 48
Although not shown, the drive mechanism may be configured to swing by attaching a drive motor to the swing pin 61 or pressing the back surface of the swing frame 48 by a hydraulic cylinder or the like. Further, the motion of the swing frame 48 is made to swing only in the counterclockwise direction in FIG. 2 from the vertical state, and the clamp device 3 attached to the rotating disk 28 is rotated.
The receiving direction of 0 is configured to be upward. In order to restrict rotation, a stopper 63 is provided opposite to the lower rear surface of the swing frame 48.

The clamping device 30 is attached to the rotating disk 28 by joining and fixing a base plate 32. The clamping device 30 is eccentric in the radial direction from the center of rotation of the rotating disk 28. It is designed to be installed in the position where it was done. That is, the connection 10
Is set at a position deviated from the rotation center Co of the rotating disk 28, and therefore, the mounting position of the gripping arm 34 is arranged to be deviated in the radial direction of the rotating disk 28.
Thus, the H-shaped steel 18 can be cantilevered by the small number of gripping arms 34, and the vertical deviation amount can be set to be minimum when the connection 10 is reversed.
As shown in FIG. 7, a deviation d is generated between the rotation center Co and the center C1 of the connection 10, and the deviation d is 2 degrees even if inverted 180 degrees.
The fluctuation amount of d can be suppressed.

As can be understood from FIG. 2, a winding drum 64 for a hydraulic hose 62 is provided at the center of the back surface of the rotating disk 28, so that hydraulic pressure can be supplied to the hydraulic cylinder 38 and the rotating drum can be rotated. The slack of the hydraulic hose 62 due to the turning of the disk 28 is prevented. The winding of the hydraulic hose 62 may use a swivel joint instead of the winding drum 64.

The operation of the embodiment constructed as described above is as follows. The connection 10 is carried in using a crane or the like, and the end of the H-shaped steel beam is inserted into the T-shaped opening of the clamp device 30. By rotating the rotary disk 28 and adjusting the posture of the clamp device 30, the clamp 10 can be easily mounted irrespective of the lifting form of the connection 10. Thereafter, the hydraulic cylinder 38 serving as a squeezing device is operated to squeeze the beam flange 20 and the web 22 between the beam and the fixed gripping arm 341. Thus, the flange 20 and the web 22 follow the position and the posture of the fixed gripping arm 341, and the position and the posture of the entire connection 10 with respect to the clamp device 30 are also determined (FIG. 8).

By rotating the rotating disk 28 while keeping the pressure applied in this state, it is possible to take an arbitrary posture around an axis that is horizontal with respect to the fixed base 24. Since the clamp device 30 is mounted at a position eccentric with respect to the rotating disk 28, the connection 10 rotates around the rotation center Co passing through a position that is approximately half the height of the web 22, so that the position on the upper surface is reduced. The change in the height of the welded surface can be reduced.

After the welding is completed, a rope is hung on the gripped port 10, the rope is hung on a crane hook, the clamp is released, and the port 10 is suspended and carried out. Here, the position of the positioner according to the embodiment is variously changed according to the carrying-in mode of the connection 10 to facilitate the mounting operation. This is shown in FIGS. That is, in the case of carrying in a suspended state by a crane or the like, as shown in FIG. 9, when the axis of the column 16 is in a horizontal state, the rotating disk 28 is rotated to adjust the clamp device 30 to the horizontal position. I do. In addition, when the entirety of the connection 10 is hoisted horizontally, as shown in FIG. 10, the clamp device 30 is adjusted so as to be at the upper (or lower) position of the rotating disk 28. Further, it is difficult to lift the connection 10 while keeping it completely horizontal. However, when the connection 10 is inclined, the swing frame 48 is moved around the swing pin 61 as shown in FIG. By rotating the clamp device 30 so that the receiving opening side of the clamp device 30 is directed in the longitudinal direction of the inclined connection 10, it is possible to prevent an excessive load from being applied to the crane or the like.

As shown in FIG. 12, when the clamp device 30 is located at the lower position by operating the rotary disk 28, the height of the gripping surface of the flange 20 is Is constant, and the distance is relatively short. For this reason, the table 10 having a slight lifting function corresponding to the stepped port 10B shown in FIG. The connection 10B can be pushed into the clamp device 30. In this case, equipment having a special function is not required for automatic setting.

In this embodiment, since the T-shaped cross-sectional structure formed by the flange 20 and the web 22 is used to grip the connection 10 of any size, the stroke of the grip arm 34 necessary for gripping is performed. May be about the thickness of the flange 20 or the like, and the clamp device 30 can be a small position welding positioner that does not need to adjust the dimensions of the terminals. Further, if the connection 10 is set at a predetermined position of the clamp device 30, the gripping can be immediately performed, and workability is greatly improved.

Further, the position and posture at which the connection 10 is held can be easily obtained in the following manner. That is, the position in the longitudinal direction of the welded portion of the joint 10 with respect to the reference position of the fixed base 24 or the like can be determined from the entire length of the beam portion since the insertion depth of the joint 10 into the clamp device 30 is constant. When the length of the beam to be inserted is shorter than the gripping portion of the clamp device 30, a limit switch may be provided on the arm 34 or the like to determine the amount of work insertion.

The hydraulic cylinder 38 of the clamp device 30 brings the connection 10 into close contact with the web contact surface 36W and the flange contact surface 36F of the fixed gripping arm 341. As a result, since the surfaces of the flange 20 and the web 22 formed so as to be orthogonal to each other follow the two orthogonal surfaces of the fixed gripping arm 341, the posture around the longitudinal axis of the connection 10 and the direction perpendicular to the longitudinal direction. The position in the plane is determined. On the other hand, since the dimensions of each part of the joint 10 to be welded are known in advance, the position, direction, and posture of the welded portion of the joint 10 with respect to the fixed base 24 are obtained from the posture of the fixed gripping arm 341.
Therefore, by sending these data to the control panel and controlling and driving the welding robot, automatic welding can be performed.

Since the gripping of the joint 10 utilizes the pressing force of the hydraulic cylinder 38, if a predetermined supply oil pressure is set, a uniform gripping force can be obtained for each of the joints 10, so that the reliability is high, and No hassle. In addition, the hydraulic cylinder 38 has a parallel hydraulic circuit, so that the cylinders arranged in the longitudinal direction of the arm at the time of pressing can apply the pressing force evenly to the work, and an excessive pressing force is generated in a single cylinder. This can be prevented, and the hydraulic circuit may have a simple configuration.

The connection 10 is reversed by rotating the rotary disk 28 by the drive motor 58. The rotation angle is the drive motor 58
May be performed by the encoder provided in the above. By rotating, the welding position can be set on the upper surface of the work, and the downward welding can be always performed, which is suitable not only for use of a welding robot but also for manual welding. In addition, the clamping device 30
Are mounted eccentrically from the axis of rotation, so that the connection 10 itself rotates about a longitudinal axis that passes through approximately the center of the height of the web 22, and the connection between the welding point located above it and the fixed base 24. Fluctuations in height can be suppressed. The gripping position of the connection 10 is far from the welding point, and does not interfere with the welding torch.

From the above, if the connection 10 is mounted, the welding position, dimensions and posture thereof can be easily determined without using a special sensor or the like, and even if the reversing operation or the like is performed, the welding location becomes large. Since there is no change, it is easy to realize welding automation by combination with a welding robot or the like.

Next, a specific embodiment of the jig of the positioner for joint welding according to the present invention will be described in detail with reference to FIGS. 14 to 16 and FIGS. 20 to 24 show the first embodiment, FIG. 17 shows the second embodiment, FIG. 18 shows the columns, and FIG. 19 shows the use state of the second embodiment.

FIG. 18 is a perspective view of only the column 16.
The column 16 is integrally formed by welding and joining the diaphragms 14 to both end faces Y17 of the square pipe 12, respectively. Generally, as described above and as shown in FIG. Has a shape slightly protruding from the outer periphery of. The column 16 is carried by a crane or the like in a state where the key points are temporarily welded and temporarily assembled by a spot welding machine or the like, and is attached to the jig 7 of the present embodiment as shown in FIG. The jig 7 of the example is held by being gripped by the positioner for connection welding. Thereafter, the main welding is performed by a welding robot or the like (not shown).

As shown in FIG. 14, the jig 7 of the first embodiment includes a gripped portion 71b gripped by gripping arms 341 to 343 of the clamp means of the above-described position welding positioner on the left side of the disk 72 in the drawing. And a column clamp device 73 for holding the column 16 on the right side of the disk 72 in the drawing. The details are as follows.

The gripped portion 71b is the same H-shaped steel as the H-shaped steel 18 of the connection 10 as shown in FIG. Therefore, the jig 7 of this embodiment is, as a matter of course,
That is, the gripper is gripped by the gripping arms 341 to 343 of the clamp means of the position welding positioner. Since the gripped portion 71 has such a simple configuration, various types are prepared, for example, as shown by a T-shaped steel 71a (this is also the second embodiment) as shown in FIG. be able to.

The column clamp device 73 is provided by the Z2 in FIG.
As shown in FIG. 15, four clamp devices 73 a to 73 d of the same type and the same shape are used to grip the squares of the diaphragm 14 of the temporarily welded column 16.
Each of them is provided in the cross direction above. The individual clamping devices are shown in detail in FIGS.
A plate 735 fastened to the disk 72 with bolts 7351;
A guide plate 734 with a scale 7341 fixed to the uppermost plate 735, a slide plate 733 freely slid or fixed thereon, a thickness adjusting shim 732 thereon, and a stopper plate 731 thereon are roughly constituted. You. Diaphragm 14
Is as follows. First, the nut 7331 is loosened so that the slide plate 733 is adjusted to the size of the diaphragm 14 (that is, refer to the scale 7341) and the guide plate 734 is provided.
Slide up. The slide plate 733 is fixed on the guide plate 734 by tightening the nut 7331 at the optimum position. By tightening or loosening the nut 7331, the presser plate 736 loosely fitted in the groove 7342 provided in the guide plate 734 is pressed against or separated from the upper wall of the groove 7342, whereby the slide plate 733 is moved to the guide plate 734. Fix it in the upper free position. Next, loosen the bolt 7312, and
Stop plate 731 and thickness adjusting shim 732 using 311
Is moved backward, and the corner of the diaphragm 14 is
33, and then the stop plate 731 and the thickness adjusting shim 7
32 forward and sandwich the square of the diaphragm 14,
By tightening the bolt 7312, the flange 1
Fix square 4 That is, according to this embodiment, the column 1
6 is gripped. Of course, the column clamp device 73 can be variously configured in addition to the above.

In this embodiment, as shown in FIG.
One column guide device 74 is mounted at each of two locations between the clamp devices 73a to 73d. See Figure 23 for details.
As shown in FIG. 24, a guide bar 741 can be freely inserted into and removed from a tip 742 of an arm 743 that rotates around a pin 744 provided on a bracket 746 that is bolted to the disk 72.
In use, the rotation of the arm 743 is stopped using the stopper 745 during use. This is to obtain the optimum position in advance using the outer wall of the square pipe 12 of the column 16 so that the column clamp device 73 can grip the square of the diaphragm 14 of the column 16 at a high precision position. .

Hereinafter, the effects of the jig 7 according to the above embodiment will be described. The column 16 forming the connection 10 is also a square pipe 1
This is a welded joint between the diaphragm 2 and the diaphragm 14. For this reason, even when welding the column 16, it is sufficient if the positioner for connection welding can be used. However, due to the general configuration of the column 16, it is a fact that the column 16 cannot be gripped by only the positioner for connection welding. However, by using the jig 7, the column can be indirectly gripped by the position welding positioner. For example, when a large number of joints 10 are produced, only the column 16 is produced in advance using the jig 7 and the positioner for joint welding, and the H-shaped steel 18 is welded and joined to these columns later. Is also possible.

[0040]

[Effect of the Invention] As described above, according to the positioner for joint welding of the present invention, the horizontal axis is set on the standing frame.
The swing frame that can swing around the axis of this horizontal axis
Provided, and a rotation perpendicular to the horizontal axis
Provide a rotating member that can rotate around the axis and raise the rotating member
Possible, and rotatably and be Rutotomoni becomes in this rotating member is inserted into the T-shaped cross section corners of Joint H-section steel beam provided with a clamping means having a plurality of gripping arms which can be clamping,
This clamping means is appropriate from the rotation axis of the rotating member.
The positioner for joint welding is mounted with eccentricity , so it can be adapted to a wide variety of joint shapes, and the joint can be easily attached and detached without additional work such as axis alignment. The effect is that the carrying-in / out of the connection can be easily performed and the steel-frame connection can be held with extremely high accuracy.

Further, according to the jig of the position welding positioner of the present invention, it is possible to hold a column which cannot be held only by the position welding positioner of the present invention. Therefore, a single positioner can perform both the welding of the steel connection portion and the welding of the column, eliminating the need to have a plurality of positioners. By performing the welding of the steel connection and the column with one positioner, the cost of performing the work can be reduced. Further, even when a space for installing a plurality of positioners cannot be secured, the work can be performed by one positioner, so that the problem of the installation space can be solved. Further, the efficiency of the work is improved because the setting of the column, which requires more time, can be performed by the external setup.

[Brief description of the drawings]

FIG. 1 is a perspective view of a positioner for connection welding according to an embodiment.

FIG. 2 is a cross-sectional view of the position welding positioner.

FIG. 3 is a perspective view of a steel connection to be welded.

FIG. 4 is a front view and an exploded perspective view of a main part of a clamp device for a positioner for connection welding.

FIG. 5 is an explanatory perspective view of a gripping arm.

FIG. 6 is a perspective view of a disk rotating mechanism.

FIG. 7 is a side view of a positioner for connection welding in a state of holding the connection.

FIG. 8 is a front view of a clamped state by a clamp gripping arm.

FIG. 9 is an explanatory diagram of a vertical loading state of a connection.

FIG. 10 is an explanatory view of a state in which a connection is carried in horizontally.

FIG. 11 is an explanatory view of a state in which a connection is inclined and carried in;

FIG. 12 is an explanatory diagram of a state in which a connection is pushed and mounted.

FIG. 13 is a side view of a stepped connection.

FIG. 14 is a side view of a jig of the positioner for connection welding according to the embodiment.

FIG. 15 is a diagram viewed from Z2 in FIG. 14 and is a diagram illustrating a column clamp device.

FIG. 16 is a diagram illustrating the gripped portion as viewed in the direction of Z1 in FIG. 14;

FIG. 17 is a diagram illustrating a gripped portion of the embodiment of the jig.

FIG. 18 is a perspective view of a column.

FIG. 19 is a view in which a jig according to an embodiment is gripped by a position welding positioner and a column is gripped by the jig.

FIG. 20 is a perspective view of a column clamping device of the embodiment of the jig.

FIG. 21 is a top view of the clamp device of FIG. 21;

FIG. 22 is a sectional view taken along the line XX of FIG. 22;

FIG. 23 is a rear view of a gripped portion of the embodiment of the jig.

FIG. 24 is a side view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Connection 12 Square pipe 14 Diaphragm 16 Column 18 H-shaped steel 20 Flange 22 Web 24 Fixed base 26 Standing frame 28 Rotating disk 30 Clamp device 32 Base plate 34 Gripping arm 36W Web contact surface 36F Flange contact surface 38 Hydraulic cylinder 40 Rod 42 Bracket 44 Pivot pin 46 Reaction force receiving block 48 Swing frame 50 Ring bearing 52 Inner race 54 Outer race 56 Ring gear surface 58 Drive motor 60 Pinion gear 61 Swing pin 62 Hydraulic hose 63 Stopper 64 Winding drum 7 Jigs 71a, 71b Cover Gripping part 72 Disk 73 Column clamp device 73a-73d Clamp device 731 Stop plate 7311 Long hole 732 Thickness adjustment shim 733 Slide plate 734 Guide plate 7341 Scale 342 groove 735 plate 736 holding plate

Continued on the front page (72) Inventor Tatsuru Okabe 1200 Manda, Hiratsuka-shi, Kanagawa Prefecture, Komatsu Ltd.Laboratory (72) Inventor Shunsuke Sugimura 1200, Manda, Hiratsuka-shi, Kanagawa Komatsu Ltd., Laboratory (72) Inventor Nagatada Yamamoto 400 Yokokura Nitta, Oyama City, Tochigi Prefecture Komatsu Manufacturing Co., Ltd. Koyama Plant (56) References JP-A-6-170531 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B23K 37 / 047 501 B23K 9/00 501

Claims (5)

(57) [Scope of request for utility model registration] 1. A horizontal axis is provided on an upright frame, and
Provide a swing frame that can swing around the axis of the shaft, and
The swing frame rotates around a rotation axis perpendicular to the horizontal axis.
A rotatable rotating member is provided so that the rotating member can be
Rolling possible and be Rutotomoni, T of Joint H-section steel beam to the rotating member
Clamping means provided with a plurality of gripping arms which can be inserted and pinched into the corner portion of the U-shaped section, and the clamping means is attached with a proper eccentric amount from the rotation axis of the rotating member. A positioner for joint welding. 2. A gripping arm of the clamping means, a fixed gripping arm inserted into a corner formed by a flange portion and a web portion of an H-shaped steel beam, and a fixed gripping arm driven to move toward and away from the fixed gripping arm. The positioner for joint welding according to claim 1, further comprising: a movable gripping arm capable of sandwiching the flange portion and the web portion between the flange portion and the web portion. Movable gripping arm according to claim 3, wherein said clamping means and having a hydraulic cylinder mechanism for giving the clamping force, according to claim 2, wherein the pivotably mounted by a pin with respect to the fixed gripping arm Positioner for joint welding. 4. The clamping means has a plurality of gripping arms attached to the rotating member and capable of being driven toward and away from each other along two intersecting axes of the rotating member. 2. The positioner according to claim 1, wherein the shaft can be held in a cantilever manner. 5. A position-holding part which is held by a holding arm of a clamping means of a position welding welding positioner according to claim 1, 2 , 3 or 4 , and a column clamping means is provided on the other side. A jig for a positioner for joint welding, characterized by its structure.