JP3215312B2 - Two-plate relative positioning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning device for relatively positioning two relatively large plates so that their upper surfaces are flush with each other, and not particularly limited thereto. The two large steel plates are used in a tack welding facility in which the long sides thereof are joined to each other and the upper surfaces thereof are flush with each other and the upper surfaces thereof are flush with each other by tack welding.
The present invention relates to a relative positioning device for steel plates.

[0002]

2. Description of the Related Art For example, as a large structural material such as a ship bottom or a deck of a large ship, a large steel plate is connected by welding to form a large plate, and a long plate and / or a transformer are welded thereto. In any of the stages of welding, since the welding target is large, the main welding is performed after partial joining by tack welding. The steel plate, which is the material of the large plate, has a length (long side length) of about 25 m when large, and the relative positioning of the two steel plates for temporary welding, that is, the butting positioning of the long sides of the two steel plates (y direction) ), Alignment in the direction x in which the long side extends and alignment in the thickness direction z are difficult operations. If there is a difference in the thickness of the two steel plates, the top and bottom surfaces are aligned, but since each of the two steel plates has undulation or deflection, the part where the surface is misaligned is visually found and one of the steel plates is crane-mounted. It is a difficult task to obtain a temporary large plate whose surface is accurately aligned over the entire length of the long side, such as by lifting, jacking up, or inserting a wedge to make the surface flush.

[0003]

However, the operation of lifting a steel plate using a crane or aligning the surfaces of the steel plate with jacks or wedges is labor-intensive, inefficient, and uneconomical. In addition, since fine adjustment is difficult, it takes time and effort to perform accurate alignment. Visual positioning that relies on the eyes of the operator is easily affected by the experience and intuition of the operator. That is, in the above-described method, the working efficiency is low and the accuracy of the surface matching is low.

[0004] It is an object of the present invention to efficiently and accurately align two plate bodies.

[0005]

In order to achieve the above object, according to the present invention, a member (b) for supporting a plate (W1, W2) below is provided.
-R), and a mechanism (rjt, rgt, rmt)
/ rjb, rgb, rmb), the upstream support mechanism (RT) and the downstream support mechanism (RB) in the y direction in the horizontal xy plane with a reference line Lo parallel to the x axis. Disposed on the upstream side and the downstream side; the transport means (CH, Ro) supports the first plate body (W1) substantially horizontally from the upstream side in the y direction, and the downstream side support mechanism (RB)
, And the second plate (W2) is supported substantially horizontally from the upstream side in the y direction to be sent above the upstream support mechanism (RT). In addition, in order to facilitate understanding,
The symbols or corresponding components of the corresponding elements of the embodiment shown in the drawings and described later are added for reference.

According to this, the first plate (W1) is supported by the downstream support mechanism (RB) on the downstream side of the reference line Lo, and the second plate (W2) is supported by the upstream support mechanism on the upstream side. Supported by (RT). The first plate (W1) and / or the second plate (W2) with the vertical drive mechanism (rjt, rgt, rmt / rjb, rgb, rmb) of the downstream support mechanism (RB) and / or the upstream support mechanism (RT) Can be driven up and down so that both upper and lower surfaces can be flush with each other, and the work efficiency of the flushing is high. In addition, it is possible to perform a more precise surface matching than when using a crane, jack or wedge.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first plate body (W1) supported by a downstream support mechanism (RB) and a second plate body supported by an upstream support mechanism (RT) above a reference line Lo. (W2), the first and second adsorption means (Ma, M
b); stoppers (42, 43) fixed above the reference line Lo and having a substantially horizontal lower end surface and positioned above each of the first plate (W1) and the second plate (W2); , first and second suction means (Ma, Mb) plate body is sucked (W1, W2) upper surface of the first and second suction means until it hits the <br/> stopper (42, 43) of the <br /> means for driving the upper side (36a, 38a); further comprising an upper surface alignment means including (Ma, Mb, 42,43,36a, 38a ), a.

According to this, the first plate body (W1) and the second plate body (W1) supported by the downstream support mechanism (RB) and the upstream support mechanism (RT) are supported.
The plate body (W2) is sucked by the first and second suction means (Ma, Mb) and is driven upward to hit the stoppers (42, 43), so that the upper surfaces of both plate bodies are accurately aligned. The downstream support mechanism (R
B) and the height adjustment of both plates by the lower support by the upstream support mechanism (RT), the plate is locally lifted due to the undulation and deflection of the plate, which makes it relatively difficult to adjust the height. Although low, positioning of the top surface by the stoppers (42, 43) is local and accurately aligned.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.

[0010]

FIG. 1 shows an appearance of a steel plate tack welding apparatus using a steel sheet positioning apparatus according to an embodiment of the present invention. This equipment is part of a large structural material assembly system that joins long and / or transformer materials to large steel plates. Is a facility that performs Welding machines S1 to S3 for tack-welding another steel plate W2 (subsequent material) to steel plate W1 (preceding material), which is a large plate material,
It is mounted movably in the horizontal x direction. On the floor surface (ground foundation), several rows of receiving rollers Ro arranged in the horizontal y direction are arranged in several rows in the x direction.
Support 2 The chain conveyor CH feeds the steel sheet W2 into the space below the portal box gutter 2 in the y direction. The leading material W2 has its upstream long side set to a reference line Lo parallel to the longitudinal axis of the gate box gutter 2, and the following material W2 has its downstream long side set to the reference line Lo. Is fed into the space below the portal box gutter 2 and welded to the preceding material W1 at several points in the x direction by the welding machines S1 to S3.

[0011] The steel plate W directly under the portal box gutter 2
The equipment below 1, W2 is shown in FIGS. FIG. 2 is an arrow 2 shown in FIG. 1 from the downstream side in the feed direction (y) of the steel sheet.
As shown by A, it is a front view of the welding machines S1 to S3 and the floor equipment immediately below them, and FIG. 3 is a plan view of the equipment looking down from the portal box gutter 2.

On the floor just below the reference line Lo, a reference line Lo
There is a belt of a roller pedestal Rf1 and a roller pedestal Rf2 installed in tandem along the line. On the upper surface of the roller pedestal Rf1 on the downstream side (arrow in the y-direction) in the transport direction y of the steel sheet from the reference line Lo, several screw jacks connected by a single rotation shaft rsb extending in the x direction and drivable up and down are possible. A plurality of support plates (four in the case of the roller pedestal Rf1) having a lower surface supported by simple guide posts and supporting rollers mounted on the upper surface are arranged in tandem in the x direction along a reference line Lo. Is driven up and down by the rotation of the motor rmb.
These reference lines L installed on the roller pedestal Rf1
The support mechanism of the roller group downstream of o (downstream support roller group) is referred to as a downstream support mechanism group RB.

For example, as shown in FIG. 4, one support plate rdb of the downstream support mechanism group RB is supported by a downstream guide post rgb and a downstream screw jack rjb that can be driven up and down. The screw jack rjb is connected to a downstream motor rmb via a reduction gear by a rotation shaft rsb extending in the x direction. On the other hand, on the upper surface of the support plate rdb, five downstream support rollers rb1 to rb5 are arranged along the reference line Lo. When the downstream motor rmb rotates forward, the rotation shaft rsb rotates, the screw jack rjb is jacked up, the support plate rdb is lifted upward, and the support roller rb on the upper surface thereof is lifted.
1 to rb5 are driven upward. Conversely, when the motor rmb rotates in the reverse direction, each element acts in reverse, and the support plate rdb and the support rollers rb1 to rb5 on the upper surface thereof are driven downward. A downstream screw jack that supports a downstream support plate other than the support plate rdb is also connected to the rotation shaft rsb, and is driven up and down simultaneously with the support plate rdb by the forward rotation of the motor rmb.

On the other hand, on the upper surface of the roller pedestal Rf1 on the upstream side of the reference line Lo with respect to the conveying direction y of the steel sheet, the upstream side of several machines connected by one upstream rotation shaft rst also extending in the x direction. The lower surface is supported by a screw jack rjt (not shown) and an upstream guide post rgt (shown in FIG. 4) that can be driven up and down, and the upper support roller rt1 (shown in FIG. 4) and the same type of support are provided on the upper surface. Several sheets with rollers (4 in roller base Rf1)
) Upstream support plates are arranged in the x direction along the reference line Lo, and are driven up and down by rotation of one upstream motor rmt (not shown). The up-down mechanism for the upstream rollers (upstream support rollers) is referred to as an upstream support mechanism group RT. The configuration of the mechanism group RT is line-symmetric with respect to the reference line Lo with respect to the downstream-side support mechanism group RB.

The configuration of the roller pedestal Rf2 is similar to that of the roller pedestal Rf1 except that the number of upstream / downstream support plates and the number of support rollers mounted on the upper surface of each support plate are different, and therefore detailed description is omitted. However, a motor that drives the upstream support mechanism group of the roller pedestal Rf2 up and down, and a motor t that drives the upstream support mechanism group RT of the roller pedestal Rf1 up and down.
mt are linked, and a motor tmb that drives the downstream support mechanism group RB of the roller pedestal Rf1 up and down and a motor tmb that drives the downstream support mechanism group RB of the roller pedestal Rf1 up and down are linked. That is, the upstream support mechanism group RT of the roller pedestal Rf1 and the upstream support mechanism group of the roller pedestal Rf2 are integrally driven up / down, and separately from the roller pedestal Rf1.
And the downstream support mechanism group of the roller pedestal Rf2 are integrally moved up / down.

FIG. 4 shows a group of upstream and downstream support mechanisms RT,
The right side of the guide posts rgt and rgb of the RB (the surface viewed by the dashed line arrow 4A in FIG. 2) is shown. The upstream and downstream support mechanism groups RT and RB are provided on the roller base Rf1 with the reference line L.
Support rollers rt1 and rb1 that rotate in the y direction and support rollers of the same type in the x direction are respectively mounted on two vertically movable drivable support plates rdt and rdb that are arranged side by side on the upstream side and the downstream side with respect to o. They are mounted side by side.
On the lower surface of the downstream support plate rdb, there is a guide post rdb supported by two columns with a telescopic bellows interposed in the middle, and a guide shaft rrb is provided in the inner space of the column of the guide post rdb. is there. A downstream rotation shaft rsb penetrates in the x direction between the two posts of the guide post rdb,
As described above, when the downstream screw jack rjb is jacked up by the forward rotation of the downstream motor rmb and the downstream rotation shaft rsb is driven upward, the guide post rdb is urged upward. At this time guide post rdb
The bellows extends upward according to the guide shaft rrb, and the support plate rdb and each support roller r mounted on the upper surface thereof.
b1 to rb5 are pushed up. Support roller group RB
Are supported by a guide post having the same configuration as the guide post rdb in the same manner as the support plate rdb, and several support plates (four in this embodiment) driven up and down by the downstream rotation shaft rsb and the downstream motor rmb. It is constituted by a support roller similar to the support roller rb1 mounted on the
Further, on the upper surface of the roller pedestal Rf2, there is provided a downstream support roller group having substantially the same configuration as the support roller group RB except for the number of support plates and the number of support rollers,
The downstream motor rmb is driven up and down integrally with the support roller group RB by a downstream motor that rotates by the same number of revolutions in the same direction at the same time as the downstream motor rmb. As a result, the steel sheet W1 supported on the downstream side of the support roller group rises (indicated by a two-dot chain line in FIG. 4).

Referring again to FIG. 3, the floor further includes
Upstream clamping devices CT1 to CT4 are installed on the upstream side with the belt of the roller pedestal Rf1 and the roller pedestal Rf2 interposed therebetween, and the downstream clamping devices CB1 to CB1 are symmetric with the upstream.
CB4 is installed. At the upper part of the belt of the supporting roller on the roller pedestal Rf1 and the roller pedestal Rf2 in the z direction, a portal box garter 2 slidably supporting the welding machines S1 to S3 is parallel to the supporting rollers. ~ S3
Is guided by the box gutter 2 and slides in the x direction above the belt of the support roller.

FIG. 5A shows the upper surface of the clamp device CT1, and FIG. 5B shows the side surface of the clamp device CT1 (the side surface viewed in the direction of the one-point arrow 5B in FIG. 5A). y
Rails 67a and 67b extending in parallel to the x direction are laid on the upper surface of the base body 60, which is a rectangular thick plate long in the direction, and a rectangular frame 66 slightly smaller than the base body 60 and longer in the y direction is provided in the x direction. It is movably supported. On the upper surface of the frame 66, a rail 6 extending parallel to the y direction is provided.
1a and 61b, and a frame 67 which is a substantially square thick plate
Are movably supported in the y direction. At the center of the upper surface of the frame 67, there is a rotating shaft 62a projecting upward, and the rotating shaft 62a supports a square rotating disk 62 rotatable about the rotating shaft 62a. The rotating plate 62 has four electromagnets m
t1 to mt4 are arranged diagonally about the rotation axis 62a. A tension coil spring kt is provided between the lower surface of the turntable 62 and the upper surface of the frame 67, and the turntable 62 is pulled downward. With respect to the frame 67, the turntable 62 is movable in the z direction and is rotatable about a shaft 62a.

By the way, the substrate 60 has a leftward direction (x
A rectangular frame 65 of the same thickness as the base 60 and slightly longer in the x direction is integrally fixed to the side surface (in the direction opposite to the arrow), and a power cylinder Spt is mounted on the upper surface thereof.
The operating axis pt of the power cylinder Spt extends rightward (in the direction of the arrow x), and its tip is connected to the left side surface of the frame 66. When the working axis pt of the power cylinder Spt projects rightward, the frame 66
When the operating axis pt of the power cylinder Spt is retracted leftward, the frame 66 is guided by the rails 67a, 67b and moves leftward. That is, when the steel sheet is attracted to the electromagnets mt1 to mt4, the steel sheet can be moved left and right in the x direction by driving the power cylinder Spt.

An air cylinder Set is mounted on the upper surface of the frame 66 in the upstream direction. The working axis et of the air cylinder Set extends in the y direction,
Its tip is connected to the frame 67. When the working axis et of the air cylinder Set protrudes in the downstream direction, the frame 67 is guided by the rails 61a and 61b and moves in the downstream direction. When the working axis et of the air cylinder Set is pulled in the upstream direction, the frame 67 is moved to the rail. 61a, 6
1b to move upstream. That is, by driving the air cylinder Set, the electromagnets mt1 to mt1 are driven.
The steel sheet adsorbed on the mt4 can be moved to the upstream side or the downstream side, and the reference line Lo of the steel sheet long in the x direction is determined by the mounting position of the upstream clamping device CT1 and the protrusion amount of the working axis et of the air cylinder Set. (Parallelism) can be adjusted. In the present embodiment, the upstream-side clamp device includes four CT1 to CT4.
However, this is for increasing the accuracy (parallel positioning accuracy) of the long side of the steel plate with respect to the reference line Lo, and may be at least one in some cases, such as when the length of the steel plate in the x direction is short. . As in the present embodiment, by increasing the number of clamping devices, the copying accuracy can be improved. Reference line Lo
Regarding the adjustment of the angle (parallelism) with respect to, the same applies to the downstream-side clamp devices CB1 to CB4.

Please refer to FIG. 3 again. The upstream clamp device CT2 is symmetrical to the upstream clamp device CT1. A power cylinder is mounted on the right side surface, and the force applied to the steel plate by the projecting / retracting of the working axis is different from the upstream clamp device CT1. The opposite is true. Further, the power cylinder (Spt) for adjusting the x position is not mounted on the upstream-side clamp devices CT3 and CT4. However, the other configuration is the same, and the mechanism and operation (angle adjustment) for driving the steel plate in the y direction are the same, and thus the description is omitted.

FIG. 6A shows an upper surface of the clamp device CB1, and FIG. 6B shows a side view of the downstream clamp device CB1 as viewed from the upstream side indicated by a dashed line 6A in FIG. Rails 71a and 71b extending parallel to the y direction are provided on the upper surface of the base 75, which is a rectangular thick plate that is long in the y direction, and the frame 70, which is a substantially square thick plate, is movably supported in the y direction. At the center of the upper surface of the frame 70, there is a rotating shaft 72a protruding upward, and there is a square rotating disk 72 supported rotatably around the rotating shaft 72a. On the turntable 72, four electromagnets mb1 to mb4 are arranged diagonally about the rotation shaft 72a. On the lower surface of the turntable 72,
Tension coil spring k between the upper surface of frame 70
b, and the turntable 72 is pulled downward. The turntable 72 is movable in the z direction with respect to the frame 70 and is rotatable about a shaft 72a.

The power cylinder Spb is mounted on the base 75 on the upper surface in the downstream direction. Power cylinder S
The working axis pb of pb extends in the upstream direction, and its tip is connected to the downstream side surface of the frame 70. When the working axis pb of the power cylinder Spb projects in the upstream direction, the frame 70 is guided by the rails 71a and 71b and moves in the upstream direction, and the working axis pb of the power cylinder Spb is moved.
Is pulled in the downstream direction, the frame 70
It is guided by 1a and 71b and moves downstream. Please refer to FIG. 3 again. Downstream clamp device CB2, CB3
The configuration of CB4 is the same as that of the clamp device CB1, and the mechanism and operation for driving the steel plate in the y-direction are the same, so description thereof will be omitted.

FIG. 7 shows a left side view of the welding machine S2 (a view as viewed from a direction indicated by a dashed-dotted arrow 7A in FIG. 1). FIG. 8 shows a longitudinal section of the welding machine S2 (a dashed-dotted arrow in FIG. 7). 8A as viewed from the direction indicated by 8A). In FIG. 8, the support mechanism 5 of the welding torch T is not shown. First, referring to FIG. 7, a welding machine frame 1 which is a rectangular frame formed so as to surround a portal box gutter 2 is supported by rails 21 laid in the x direction on the upper surface of the box gutter 2. The roller 11 is moved in the x direction along the box garter 2 by the moved roller 11. A rail 12 extending in the y direction is provided at a lower portion of the welding machine frame 1.
2 is movably supported in the y direction. The frame 32 supports an x-direction drive mechanism (not shown) that supports the groove copying mechanism 5 that supports the welding torch T, and electromagnets Ma and Mb (FIG. 8) for Z positioning of the steel plates W1 and W2. Have been. The slider 31 is for roughly adjusting the position in the y direction so that the tip of the welding torch T is on the reference line Lo.

More specifically, the upper ends of columns 13, 14, 15 extending in the z direction are fixed to the lower surface of the frame 32, and the jack 3 is placed at the center of the columns 13, 14, 15. The fixed support plate 39 is fixed. The lower part of the columns 13 to 15 has two air cylinders 36a,
The support board 37 on which the 36b is placed is supported so as to be vertically movable. The jack 3 drives the support column 33 extending in the z direction upward when the motor 34 is energized in the forward direction. Support pillar 3
The lower end of 3 penetrates the support board 39 movably in the z direction,
The upper ends of the support columns 35 that firmly support the support board 37 are connected. When the jack 3 drives the support column 33 upward, the support column 35 and the support plate 37 connected to the support column 33 move to the columns 13,
It is pulled up while being guided by 14 and 15. When the motor 34 is energized in the opposite direction, these components act in reverse, and the support board 37 is
Get down while being guided by. The support board 37 supports an x-direction drive mechanism (not shown) that supports the groove copying mechanism 5 that supports the welding torch T.

Referring to FIG. An electromagnet support board 41 is fixed to the lower surface of the support board 37, and a reference line L is formed on the lower face of the electromagnet support board 41 along the long side along the edge in the x direction.
Downstream side (W1 side) and upstream side (W2) around o
Rectangular stoppers 42 and 43 extending downward are fixed vertically downward. Inside the stoppers 42 and 43, two square electromagnets Ma and Mb are arranged side by side on the downstream side (W1 side) and the upstream side (W2) of the reference line Lo, respectively. The support shaft 38a extends upward,
38b protrudes and penetrates the support board 37 and the electromagnet support board 41 movably in the z direction. On the upper surfaces of the support shafts 38a and 38b protruding from the upper surface of the support board 37, there are provided grooves on the peripheral surfaces orthogonal to the x direction, the width of which becomes narrower upward.
As described above, on the upper surface of the support board 37, two air cylinders 36a and 36b that extend the output shaft in the direction opposite to the x direction are mounted, and the tips of the output shafts are each provided with a tapered wedge. Have been. The tip of the wedge is a support shaft 3
8a, 38b. When the air cylinders 36a and 36b are driven and their output shafts protrude, the wedges attached to the ends thereof support
The support shafts 38a and 38b are pushed into the grooves of 8a and 38b whose width becomes narrower as going upward, and drive the support shafts 38a and 38b upward. Along with this, the electromagnets Ma, Mb integral with the lower ends of the support shafts 38a, 38b are lifted upward (movement from the two-dot chain line position to the solid line position in FIG. 8).

When the air cylinders 36a and 36b are not energized and their output shafts are not inserted into the grooves of the support shafts 38a and 38b to the limit, the wedges mounted on the ends of the electromagnets Ma and Mb are not used. Lower surface is stopper 4
8, 43 projecting downward from the lower end in the z direction (2 in FIG. 8).
Dotted line position). When the air cylinders 36a, 36b are driven and the electromagnets Ma, Mb are lifted upward to the limit, the lower surfaces of the electromagnets Ma, Mb are brought into contact with the stoppers 42, 43.
(Two-dot chain line in FIG. 8).

Although not shown, the support board 37 supports an x-direction torch drive mechanism, and the x-direction torch drive mechanism supports the groove tracing mechanism 5. -T is supported.

When the motor 34 shown in FIG. 7 is energized in the opposite direction, the jack 3 drives the support column 33 extending in the z direction downward, and the support board 37 moves downward. Stoppers 42, 4
When 3 comes in contact with one of the steel plates W1 and W2, the load on the motor 34 increases, so that the energization of the motor 34 is stopped there.
As a result, the welding torch T is moved with respect to the steel plates W1 and W2.
It becomes the height (z direction) for welding. In this state, the electromagnet M
a and Mb are in contact with the steel plates W1 and W2, respectively. Here, the electromagnets Ma and Mb are energized to be attracted to the steel plates W1 and W2. When the air cylinders 36a, 36b are driven to lift the electromagnets Ma, Mb upward to the limit, the steel plates W1, W2 move upward together with the electromagnets Ma, Mb, and both hit the lower surfaces of the stoppers 42, 43, and The upper surfaces of W1 and W2 have the same height. Here, welding welding
H is adjusted to the groove center (Lo) by the groove copying mechanism 5,
When welding is started, an x-direction torch drive mechanism (not shown) is driven to perform welding for a set length in the x-direction (for example, 50 cm).

The downstream roller group and the upstream roller group supported by the downstream support mechanism group RB and the upstream support mechanism group RT cause the steel sheet W1, W2 is supported below the base line Lo so that its upper surface is substantially at the same height before and after the reference line Lo. However, this accuracy is low, and each part in the x direction is owing to the undulation and bending of the steel plates W1 and W2. Thus, a height shift easily occurs between the upper surfaces of the steel plates W1 and W2. The above-mentioned forcing of the upper surfaces of the steel plates W1 and W2 using the electromagnets Ma and Mb and the stoppers 42 and 43 increases the height of the upper surfaces of the steel plates W1 and W2 partially in the vicinity of the temporary welding portion. This is done with precision.

Chain conveyor CH, support rollers, upstream clamping devices CT1 to CT4, downstream clamping device C
In the present embodiment, B1 to CB4 and the welding machines S1 to S3 are driven and controlled by drive commands output by an operator via an operation panel D shown in FIG. Next, a usage mode of the facility of the present embodiment will be described.

[1. Position setting of steel sheet W1] The operator operates the operation panel D shown in FIG. 7 to drive the chain conveyor CH, and feeds the preceding material (steel sheet) W1 in the y direction shown in FIG. Is stopped immediately before (upstream) the reference line Lo. Then, the upstream clamp device CT
1 to CT4 are energized. That is, the preceding material W1 is clamped. Next, the upstream clamping devices CT1 to CT
4 are individually driven to make the downstream long side of the preceding material W1 clamped substantially parallel to the reference line Lo, and then the power cylinder Spt is driven to drive the preceding material W1.
Is adjusted in the x direction. And the upstream clamping device C
The energization of the electromagnets T1 to CT4 is cut off (clamp release).

Next, the chain conveyor CH is driven again, the steel sheet W1 is passed through the reference line Lo, and when the upstream long side of the steel sheet W1 substantially matches the reference line Lo, the chain conveyor CH is moved. Stop and downstream clamp device CB
1 to CB4 are energized to clamp the steel plate W1.

[2. Next, the chain conveyor CH is driven to transport the steel sheet W2 from the upstream side to the vicinity of the reference line Lo. When the downstream long side of the steel sheet W2 reaches just before the reference line Lo (the upstream long side of the steel sheet W1), the conveyance is stopped, and the electromagnets of the upstream clamping devices CT1 to CT4 are energized to clamp the steel sheet W2. Next, the air-cylinder Set is individually driven and clamped to make the downstream long side of the succeeding material W2 substantially parallel to the reference line Lo (the upstream long side of the steel plate W1), and then the power cylinder Spt is driven. Then, the x-direction position of the preceding material W2 is adjusted, and the x-direction positioning of the following material W2 with respect to the preceding material W1 is performed. Next, all of the air-cylinders Set are driven substantially at the same time, and the following material W2 is driven.
Is pressed against the preceding material W1 (the state shown in FIG. 1).

[3. Upper surface alignment of steel plates W1 and W2] When there is a difference between the thicknesses of the steel plate W1 and the steel plate W2, the upstream support mechanism RT or the downstream support mechanism RB is driven to support the thinner steel plate. The roller is raised in the z-direction (or the roller supporting the thicker steel plate is lowered in the z-direction), and the upper surfaces of the steel plate W1 and the steel plate W2 are made flush (two-dot chain line in FIG. 4). ).

[4. Temporary welding] The welding machines S1, S2, S3 supported by the box garter 2 are driven to the first welding positions in the respective x-directions to give welding start commands to the welding machines S1, S2, and S3. . Describing the welding machine S2, the welding machine S2 responds to the welding start command.
2 energizes the motor 34 shown in FIG. 7 in the reverse direction. As a result, the jack 3 drives the support column 33 extending in the z direction downward, and the support board 37 moves downward. Stoppers 42, 43
When the steel plate comes into contact with one of the steel plates W1 and W2, the load on the motor 34 increases. In response, the welding machine S2 stops the energization of the motor 34 there. Thereby, the welding torch T
Is the height for welding (z direction) with respect to the steel plates W1 and W2.
Becomes In this state, the electromagnets Ma and Mb are respectively
1, W2. Here, the welding machine S2 is an electromagnet M
a, Mb are supplied with electricity to cause the steel plates W1, W2 to be adsorbed. Then, the air cylinders 36a and 36b are driven to drive the electromagnet M
a, Mb is lifted upward to the limit. As a result, the steel plates W1 and W2 move upward together with the electromagnets Ma and Mb, and both hit the lower surfaces of the stoppers 42 and 43, so that the upper surfaces of the steel plates W1 and W2 have the same height. Here, the welding machine S2 adjusts the welding torch T to the groove center (Lo) by the groove copying mechanism 5, starts welding, and drives an x-direction torch driving mechanism (not shown) to perform x A welding of a set direction length (for example, 50 cm) is performed.
When this is completed, the welding machine S2 stops the energization of the electromagnets Ma and Mb after a predetermined cooling time has elapsed, and sets the x-direction toe.
H is returned to the standby position, and the air-cylinder 36a,
The motor 36b is driven to return, and the motor 34 is energized in the forward direction to return the support board 37 to the upper standby position. Then, the process proceeds to a predetermined second welding position (x direction), and the second welding is performed in the same manner. The above-described welding operation is performed up to the set n-th time. The other welding machines S1 and S2 also have a welding machine S3.
The welding operation is performed in the same manner as described above.

[6. Clamp release] When all of the welding machines S1 to S3 complete the tack welding for the set number of times n, the operator:
The roller group supported by the upstream support mechanism group RT and the downstream support mechanism group RB is returned to the lowermost position, and the upstream clamp apparatuses CT1 to CT4 and the downstream clamp apparatuses CB1 to CB1.
Stop energizing the CB4 electromagnet (release the clamp)
Return to the standby position.

When the steel plate W2 is tack-welded to the steel plate W1 and the third steel plate is tack-welded to the steel plate W2 as described above, the operator drives the chain conveyor CH here. Then, the steel sheet W1 + W2 is passed through the reference line Lo, and when the long side on the upstream side of the steel sheet W2 substantially matches the reference line Lo, the chain conveyor CH is stopped, and power is supplied to the downstream clamping devices CB1 to CB4. Then, the steel plate W2 is clamped. Hereinafter, [2. Position setting of steel plate W2] The following work is performed in the same manner. However, the steel plate W2 is read as W3, and the steel plate W1 is read as W2. Fourth on steel plate W3
The same applies to the case where the steel sheet W4 is further tack-welded.

[7. As described above, a large plate in which a plurality of steel plates are joined together by tack welding is sent out downstream by driving a chain conveyor.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an outline of a large plate tacking and welding equipment provided with an embodiment of the present invention.

FIG. 2 shows a garter 2 viewed in the direction of a dashed line 2A in FIG.
FIG. 4 is a front view showing a roller group immediately below the roller group.

FIG. 3 is a plan view of a roller group support structure shown in FIG. 2;

FIG. 4 is an enlarged sectional view taken along line 4A-4A of FIG. 2;

5 (a) is an upstream clamp device CT1 shown in FIG. 3;
(B) is a front view.

FIG. 6A shows a downstream clamping device CB1 shown in FIG.
(B) is a rear view.

FIG. 7 is an enlarged sectional view taken along the line 7A-7A of FIG. 1;

8 is an enlarged front view of a part of the welding machine S2 shown in FIG. 7, as viewed from a direction indicated by a dashed-dotted arrow 8A in FIG.

[Explanation of symbols]

1: welding machine frame 2: portal box girder 3: jack 11: roller 12, 21: rail 13, 14,
15: Support column 31: Slider 32: Frame 33, 35: Support column 34: Motor 36a, 36b: Air cylinder 37, 39:
Support boards 38a, 38b: Support shaft 41: Electromagnet support boards 42, 43: Stoppers 60, 75:
Bases 61a, 61b, 67a, 67b, 71a, 71b: Rails 62, 72:
Turntables 62a, 72a: Turntables 65, 66, 67, 7
0: Frame CB1 to CB4: Downstream clamp device CT1 to CT4:
Upstream clamp device CH: Chain conveyor et, pt, pb: Working axis kb, kt: Tension coil spring Lo: Reference line Ma, Mb: Electromagnet mb1-mb4, mt1
Mt4: electromagnet RT: upstream support mechanism group RB: downstream support mechanism group rb1 to rb5, rt1: support roller rdb, rdt: support plate Rf1, Rf2: roller pedestal rgb, rgt: guide post rrb: guide shaft rmb: Motor rsb, rst: Rotating axis Ro: Receiving roller S1, S2, S3: Welding machine Set: Air cylinder Spt, Spb: Power cylinder T: Welding torch W1, W2: Steel plate

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-169481 (JP, A) JP-A-5-154695 (JP, A) JP-A-3-106291 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) B23K 37/04 B23K 9/235

Claims (3)

(57) [Claims] 1. A horizontal x-axis member, each of which supports a member for supporting a plate below, and includes a mechanism for driving the member up and down.
an upstream support mechanism and a downstream support mechanism that are separated from each other in the y direction with a reference line Lo parallel to the x axis on the y plane; and the first plate body is substantially horizontal from the upstream side in the y direction. Transport means for supporting the second plate body above the downstream support mechanism and feeding the second plate body substantially horizontally from the upstream side in the y direction and feeding the second plate body above the upstream support mechanism. . A second plate supported by the downstream support mechanism and a second plate supported by the upstream support mechanism, which are located above the reference line Lo and are attracted to the plate bodies; First and second suction means; stoppers fixed above the reference line Lo and having a substantially horizontal lower end face and located above each of the first plate and the second plate; and the first and second suction means. means for driving the first and second suction means on side to the top surface of the plate body suction hand stage is aspirated strikes the stopper;
2. The two-plate body positioning apparatus according to claim 1, further comprising an upper surface positioning means including: 3. The plate according to claim 2, wherein the plate is a steel plate, and the first and second suction means are electromagnets supported by a welding machine for welding between the first plate and the second plate. A two-plate positioning device.