JPH1045242A - Plate material transfer device - Google Patents

Abstract

(57) Abstract: A transport device (30) for relatively narrowing a first plate material and a second plate material, and transporting the first plate material while bringing the side surfaces into contact with each other. The transport device 30 includes transporting means 40A to 40D on which the first and second plate materials are placed and moved forward and backward, positioning means 50 which moves up and down for positioning the first plate material, and the first plate material toward the positioning means. First pressing means 5 for pressing and positioning
5A, first holding means 60A for holding the end of the first plate material on the transport means, second pressing means 55B for pressing and positioning the second plate material toward the first plate material, and end of the second plate material And a second holding means 60B for holding the sheet in the conveying means. [Effect] Even in the case of flat slopes having different plate thicknesses, it is possible to accurately align the plate materials without overlapping one another and without excessively widening the gap between the other plate materials. There is no worry about roll wear or plate edge deformation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for narrowing plate materials together in a process of manufacturing a collective blank material.

[0002]

2. Description of the Related Art For example, Japanese Unexamined Patent Publication (Kokai) No. 62-203679, entitled "Method and Apparatus for Conveying and Guiding Sheets or Strips to be Batted" discloses a method of joining two strips by a butt welding method and widening the width ( A technique for manufacturing a sheet of (double width) is disclosed. This technology is described in
As shown in the figure, the sheet 2 is inclined at an angle α with respect to the sheet 1 and is carried in.
11, the level of both sheets 1 and 2 is adjusted. In FIG. 4, the inside edge of sheet 1 is regulated by guide surface 8a and the inside edge of sheet 2 is regulated by guide surface 8b on the entry side of grip rolls 11 and 11. It is characterized by doing.

[0003]

FIG. 5 of the above publication discloses:
Sheets 1 and 2 sandwiched between grip rolls 11 and 11 are shown. There is no problem if the sheet thicknesses of the left and right sheets 1 and 2 are the same, but if there is a difference, there is the following problem. Assuming that the sheet 1 is thick and the sheet 2 is thin, the roll gaps of the grip rolls 11 and 11 are the same as the thickness of the sheet 1, and the thin sheet 2 is in an unconstrained state and freely moves left and right. As a result, the gap between the inner edge of the sheet 1 and the inner edge of the sheet 2 becomes uneven, and the butt welding to be performed next is incomplete.

Therefore, the technique disclosed in the above publication cannot be applied to welding sheets having different thicknesses. Also, the guide surface 8
Since the inner edges of the sheets 1 and 2 are slid on the a and 8b, when the sheets 1 and 2 are thin, the inner edges may be deformed due to buckling. Further, since the rolls are used for conveyance and guidance, the wear of the rolls must be always taken into consideration, and the maintenance of the apparatus is difficult.

On the other hand, it is necessary to change the thickness and material of each part of an automobile body in view of requirements such as rigidity, durability and energy absorption performance. In general, the vehicle body is formed by pressing a flat plate material into a curved surface shape. Therefore, the flat plate material is
A collective blank material in which sheets having different thicknesses are joined in advance is preferable. However, in the technology of the above publication,
Since such a flat plate material cannot be manufactured, it is necessary to develop an alternative technology.

Accordingly, an object of the present invention is to provide a technique which can accurately narrow flat hills having different plate thicknesses before welding, and which does not cause deformation of edges and does not involve roll wear. Is to do.

[0007]

According to a first aspect of the present invention, at least a first plate material and a second plate material are relatively narrowed at a plate material supply position, and the side surfaces are brought into contact with each other. In the transporting device for transporting, the transporting device is the first device.
A transporting means capable of moving forward and backward in the line direction with the second plate material placed thereon, a positioning means provided to be able to move up and down for positioning the first plate material,
First pressing means for pressing the plate material to position the first plate material, first holding means for holding the positioned end of the first plate material to the transport means, and second plate material toward the positioned first plate material And a second holding means for holding the end of the positioned second plate material by the transport means.

[0008] Even in the case of flat hills having different plate thicknesses, the other plate material does not ride on and overlap with the other plate material, or
The plate members can be accurately aligned with each other without an excessively large interval. Furthermore, there is no worry about the abrasion of the roll and the deformation of the plate material edge.

According to a second aspect of the present invention, a pair of first transport means and second transport means are provided for the first plate member, and the first transport means and the second transport means are provided in pairs.
The transport means and the transport means can be independently moved forward and backward so that, when one of the transport means is transporting the first plate material, the other transport means can receive the next first plate material at the plate material supply position. A pair of a third conveying means and a fourth conveying means are prepared for the second plate member, and the third conveying means and the fourth conveying means can be moved forward and backward independently of each other. When the two plate materials are being conveyed, the other conveyance means can receive the next second plate material at the plate material supply position, so that the second plate material is relatively widened and the side surfaces are in contact with each other. The first plate member and the second plate member can be welded while being conveyed.

Since the first and second plate members which have been relatively shifted can be transported to the next step by a plurality of transport means, the plate members can be transported efficiently. Further, the first plate material and the second plate material in a state where the side surfaces are in contact with each other while being relatively shifted can be welded while being conveyed.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of the reference numerals. In this embodiment, the “first plate” will be referred to as a cutting plate 2A, and the “second plate” will be referred to as a cutting plate 2B.
The cutting plate 2A is a thick plate, and the cutting plate 2B is a thin plate. However, the present invention is not limited to this. For example, the cutting plate 2B may have the same thickness.

FIG. 1 is a plan view of a machining line according to the present invention, in which a workpiece flows from right to left in the drawing. The processing line 1 includes two cutting plate stock units 10A and 10B for stocking two cutting plates 2A and 2B, and two cutting plate supply units 20A and 20 for supplying the two cutting plates 2A and 2B.
B, a transporting device 30 for relatively narrowing the cutting plates 2A and 2B together and transporting them while bringing their side surfaces into contact with each other;
Welding means 70 for welding the contact portions of the cut plates 2A and 2B which have been shifted in width to integrate them, three feeding means 80A, 80B and 80C for feeding the wide plate 3 obtained by welding, and the wide plate 3 to blank blank for press of desired shape 4
And a cutting means 90 for cutting out the above. In addition, the cutting board 2A, the cutting board stock means 10A, the cutting board supply means 20A, and the delivery means 80A show the left column of the line.
Further, the cutting board 2B, the cutting board stock means 10B, the cutting board supply means 20B, and the delivery means 80B show the right column of the line. The delivery means 80C indicates the center row of the line.

FIG. 2 is a side view of the processing line according to the present invention, and the configuration and operation of main equipment will be described for row A.
The same applies to column B. The cutting plate stock means 10A is a device for stacking and stocking a large number of cutting plates 2A...
And a separator 13 for separating the cutting plates 2A one by one at regular intervals.

The cutting plate supply means 20A is a belt conveyor for supplying the cutting plates 2A one by one in order from the top. The cutting plate supply means 20A includes a conveyor belt 23 wound between the pulleys 21 and 22, an electromagnet rail 24 provided below the center of the pulleys 21 and 22 and very close to the lower surface of the conveyor belt 23, and Plate stock means 10A
And a cylinder 25 for raising and lowering the pulley 22 on the side.
The conveyor belt 23 is a general-purpose non-metallic belt made of urethane rubber containing wire beats.
F is a plate material supply position.

The pulley 22 is lowered by the cylinder 25 to bring the conveyor belt 23 close to the uppermost cutting plate 2A.
When electricity is supplied to the electromagnet rail 24, the cutting plate 2 </ b> A made of a magnetically absorbing metal plate such as a carbon steel plate is attracted by magnetic force and adheres to the conveyor belt 23. The operation does not change during driving of the conveyor belt 23. Therefore, the cutting plate 2A can be accurately conveyed without falling or slipping. And
When the power supply to the electromagnet rail 24 is cut off at the plate material supply position F to be supplied to the transport device 30, the magnetic force disappears, and the cutting plate 2 </ b> A falls from the conveyor belt 23. The transport device 30 will be described later.

The welding means 70 is preferably a carbon dioxide laser welding machine or a yag laser welding machine.
1, a slider 72 mounted on the stand frame 71 so as to be able to reciprocate horizontally in the front and back directions in the figure, and a slider 7
2, the welding torch 73 is mounted downward, and the welding torch 73 is moved in the line cross direction so as to face the abutting portion between the cut plates, and welding is performed by the laser beam from the welding torch 73.

The delivery means 80A is a belt conveyor for delivering the wide plate 3 (see FIG. 1) obtained by welding. The feeding means 80A includes a conveyor belt 83 wound between the pulleys 81 and 82, and an electromagnet rail 84 provided above the center of the pulleys 81 and 82 and very close to the upper surface of the conveyor belt 83. The conveyor belt 83 is a general-purpose nonmetallic belt made of urethane rubber containing a wire beat, and when a current is supplied to the electromagnet rail 84, the lines of magnetic force pass through the conveyor belt 83.

The cutting means 90 is preferably a carbon dioxide laser fusing machine or a yag laser welding machine. The laser fusing machine has the same principle as the laser welding machine, but has a large heat input per unit area. The cutting means 90 includes a stand frame 91.
Sliders 92 attached to the stand frame 91 so as to be able to reciprocate horizontally in the front and rear directions of the drawing, and cutting torches 93 attached downward to the sliders 92. The work can be moved to the left and right in the drawing by the operation of the table. Therefore, the cutting torches 93 can be relatively two-dimensionally moved in the XY directions of the work, and a desired shape can be cut out. Of course, the work may be stopped and the cutting torches 93 may be moved two-dimensionally.

FIG. 3 is a plan view of the transfer device according to the present invention. The transport device 30 includes a table 32 extending in the line direction at the center of the line, and four transport units (first transport unit 40A, second transport unit 40B, Third transport means 40
C, and fourth transporting means 40D), two positioning means 50, 50 arranged at the center of the line of the table 32 and in the line direction, and the four transporting means 40A to 40D.
55A of the 1st pressing means arrange | positioned outside in the line cross direction of
And the second pressing means 55B and the first and second conveying means 4
0A, 40B, the first holding means 60A,
Second holding means 6 attached to fourth transport means 40C, 40D
0B.

Table 32 and four transport means 40A-
The arrangement of 40D is such that the first transport unit 4 is arranged from the left row in the line direction.
0A, the second transport unit 40B, the table 32, the third transport unit 40C, and the fourth transport unit 40D. In the figure,
Reference numeral 73 denotes the position of the welding torch 73 of the welding means 70 (see FIG. 2).

FIG. 4 is a sectional view taken along line 4-4 of FIG.
The transport means 40A includes a first rail 41A extending in the line direction and attached to the machine frame 31 via a pair of brackets 31a, 31A, and a first transport table 42A attached to the first rail 41A so as to be movable forward and backward. A drive pulley 43 and an idler pulley 44 rotatably mounted on the machine frame 31 along the first rail 41A via a pair of brackets 31b, 31b, and a first wound around these pulleys 43, 44.
A belt 45A and a first transmission mechanism 46A (an intermediate shaft 46a, a sprocket 46) for driving the driving pulley 43;
b, 46c, 46d, 46e, chains 46f, 46g
Consists of ) And the first drive motor 47A, and the connecting member 4 connecting the first transfer table 42A and the first belt 45A.
8

The first holding means 60A holds the positioned end of the cutting plate 2A on the first transport means 40A. The first holding means 60A includes a pair of first holding means which are attached to the front end and the rear end of the first transfer table 42A so as to be vertically swingable.
Holding arms 61A, 61A and first cylinders 62A, 62 for swinging the first holding arms 61A, 61A.
A. The first holding arm 61A has a hook-shaped tip for holding the cutting plate 2A. The second holding unit 60B has the same configuration as the first holding unit 60A,
It comprises a second holding arm 61B and a second cylinder 62B.

FIG. 5 is a sectional view taken along the line 5-5 in FIG. 4. The positioning means 50 is provided so as to be able to move up and down for positioning the cutting plate 2A. The positioning means 50 is a table 3
2 comprises a positioning member 51 which can be moved up and down from the upper surface, and a cylinder 52 which moves the positioning member 51 up and down. Second
The third and fourth transport means 40B, 40C, 40D have the same configuration as the first transport means 40A. For details,
The second transport means 40A and 40B are means for transporting the cutting board 2A, and the third and fourth transport means 40C and 40D are means for transporting the means for transporting the cutting board 2B.

The second transfer means 40B is provided with a second transfer table 42B mounted on the second rail 41B so as to be movable forward and backward.
Is driven by the second belt 45B, and the third transport means 40C drives the third transport table 42C mounted on the third rail 41C so as to be able to move forward and backward by the third belt 45C. The transport means 40D drives a fourth transport table 42D mounted on the fourth rail 41D so as to be able to move forward and backward by a fourth belt 45D.

The first transmission mechanism 46A includes a first transfer table 42A.
The first drive motor 47A and the first drive motor 47A are moved via the first intermediate shaft 46a in order to synchronously move the
-Each drive pulley 43, 4 of the fourth transport means 40A, 40D
3 is connected. On the other hand, the second transmission mechanism 46B
Drives the second drive motor 47B and the second and third transfer means 40B and 40C via the second intermediate shaft 46h in order to move the second transfer table 42B and the third transfer table 42C in synchronization. The pulleys 43 are connected to each other.

The first pressing means 55A is provided with a positioning means 50.
Is a means for positioning the cutting plate 2A by pressing the cutting plate 2A in the direction of. The two are arranged in the line direction (only one is shown in this figure). First pressing means 55A
A first pressing member 56A that slides the upper surface of the auxiliary table 33 above the machine frame 31 toward the positioning means 50;
First cylinder 57 that slides this pressing member 56A
A.

The second pressing means 55B is a means for pressing the cutting plate 2B toward the positioned cutting plate 2A to position the cutting plate 2B, and has two in the line direction (only one is shown in this drawing). ) Are arranged. Second pressing means 55B
Has the same structure as the first pressing means 55A,
A second pressing member 56B that slides the upper surface of the upper auxiliary table 34 toward the cutting plate 2A;
6B, and a second cylinder 57B that slides the second cylinder 57B.
The upper surface of the table 32, the upper surfaces of the auxiliary tables 33 and 34, and the upper surfaces of the four transfer tables 42A to 42D are all at the same level.

The procedure for shifting the width of the transport device 30 having the above configuration will be described with reference to FIG. 6 (a) to 6 (d) are explanatory views of the procedure for shifting the width of the transport device according to the present invention, and show the view from the near side in the line direction. In addition, in order to facilitate understanding, the cutting plate 2 is attached to the first transfer table 42A and the fourth transfer table 42D.
A case where A and 2B are supplied will be described. As shown in (a), the cutting plates 2A and 2B conveyed by the two cutting plate supply means 20A and 20B are connected to the first and fourth conveyance tables 42A and 42D.
Is suspended at a position (plate material supply position F shown in FIG. 4). In this state, the positioning member 51 is raised (arrow), the cutting plate 2A is dropped on the first transfer table 42A and supplied (arrow), and the first pressing member 56A is extended to move the cutting plate 2A to the positioning member 51. To position the cutting plate 2A (arrow).

Next, in (b), the first holding arm 6
After swinging 1A and holding the end of the cutting plate 2A on the first transfer table 42A (arrow), the positioning member 51 is lowered and the first pressing member 56A is retracted (arrow).
Thereafter, in (c), the cutting plate 2B is dropped onto the fourth transfer table 42D and supplied (arrow), and the second pressing member 56 is supplied.
B is extended and the cutting plate 2B is pressed toward the cutting plate 2A to position the cutting plate 2B (arrow). Finally, in (d), the second holding arm 61B is swung to hold the end of the cutting plate 2B on the fourth transfer table 42D (arrow), and then the second pressing member 56B is retracted (arrow). This completes the width adjustment work.

Next, the transfer procedure of the transfer device will be described with reference to FIGS.
It will be described based on. FIGS. 7A to 7C are views for explaining a first transfer procedure of the transfer device according to the present invention, and FIGS. 8A to 8C.
FIG. 7 is an explanatory view of a second transfer procedure of the transfer device according to the present invention, and FIG. 7 and FIG. As shown in FIG. 7A, the first and fourth transfer tables 42A and 42D and the second and third transfer tables 42B and 42C are located apart from each other in the line direction L.

First, the first and fourth transfer tables 42A, 42D
Holds the cutting plates 2A and 2B which are shifted to each other by the width shifting procedure shown in FIG. 6 and starts moving in the line direction L. At this point, the second and third transfer tables 42B, 4
2C is in a standby state. After that, the first and fourth transfer tables 42
A and 42D move, and the front ends of the cutting plates 2A and 2B
When reaching the position of the welding torch 73 shown in (b),
The welding torch 73 starts welding a contact portion between the cutting plates 2A and 2B. The first and fourth transfer tables 42A and 42D continue to move at a speed appropriate for continuous welding. As shown in FIG. 7C, when the cut plates 2A and 2B are welded to a predetermined position, the second and third transfer tables 42B and 42C start moving at high speed in the direction opposite to the line direction L.

As shown in FIG. 8A, the second and third transfer tables 4
2B and 42C pass below the cutting plates 2A and 2B and stop when they move to a predetermined plate material supply position F (see FIG. 4). Then, the second and third transfer tables 42B and 42C are
The next cutting plates 2A and 2B are received, moved to each other by the width moving procedure shown in FIG. 6, and held. Even during this series of operations, the first and fourth transfer tables 42A and 42D continue to move, and the welding torch 73 continues to weld the cutting plates 2A and 2B.

Next, as shown in FIG. 8B, the second and third transfer tables 42B and 42C are connected to the first and fourth transfer tables 42A and 42D.
Moving in the line direction L at a higher speed than the cutting plate 2 being welded.
Approach A, 2B. Then, the second and third transfer tables 42
B and 42C are the first and fourth when the vehicle approaches the predetermined distance.
The speed is the same as that of the transfer tables 42A and 42D. Meanwhile,
The plates 2A and 2B being welded have completed welding, and the first and fourth carriages 42A and 42D send the wide plate 3 obtained by welding to the feeding means 80A and 80B as shown in FIG. Transport and wait. The feeding means 80A and 80B feed the wide plate 3 to the next step.

When the welding of the cutting plates 2A, 2B during welding is completed, the next cutting plates 2A, 2B are successively connected to the welding torch 7.
3 and the welding operation can be performed almost continuously. Thereafter, the four transfer tables 42A to 42D shift to the step of FIG. 7B.

As is clear from the above description, the transport device 30 prepares the first transport means 40A and the second transport means 40B in pairs for the cutting plate 2A, and the first transport means 40A and the second transport means 40B. Can be moved forward and backward independently of each other, so that one of the transporting means 40A or 40B
When the cutting plate 2A is being conveyed by the other conveying means 40
The next cutting plate 2A can be received at B or 40A.

The transport device 30 prepares a pair of the third transport means 40C and the fourth transport means 40D for the cutting plate 2B, and makes the third transport means 40C and the fourth transport means 40D independent from each other. When the cutting board 2B is being conveyed by one of the conveying means 40C or 40D, the next cutting board 2B can be received by the other conveying means 40D or 40C. Therefore, the cutting plates 2A and 2B which have been relatively shifted can be piston-conveyed to the next step by the four conveying means 40A to 40D. Then, the cutting plates 2A and 2B in a state where the widths are relatively shifted and the side surfaces are in contact with each other can be welded while being sequentially conveyed.

In the above embodiment, the transfer device 3
0 indicates that the cutting plate 2A is held by the first holding means 60A,
B is held by the second holding means 60B. That is, since the transporting device 30 holds the cutting plate 2A and the cutting plate 2B by independent holding means, even if the plate thickness of the cutting plate 2A and the cutting plate 2B is the same or different, the cutting plate 2A, 2
B can be appropriately shifted to each other.

In the above embodiment, two rows of cutting plates 2A,
Although 2B has been described as an example, the cutting plates may be three or more rows. Further, the four transport means 40A, 40B, 40C, 4
0D may be any configuration that can move forward and backward in the line direction with a plate material placed thereon, and is not limited to a belt-driven carriage that is mounted on a rail so that it can move forward and backward. Transport means may be used.

The first transport means 40A and the fourth transport means 40D
The second transporting means 40B and the third transporting means 40C may have any configuration as long as they can be moved synchronously. The configuration for synchronizing them can be used. Regardless. First and second holding means 60A, 60B
Transports the ends of the positioned cutting plates 2A and 2B
A to 40D as long as the first and second holding arms 61 can be held depending on the thickness of the cut plates 2A and 2B.
The length of A and 61B may be adjusted. Further, the transfer device 30 may be a device incorporating the welding means 70.

[0040]

According to the present invention, the following effects are exhibited by the above configuration. A first aspect of the present invention is a transporting apparatus for transporting at least a first plate material and a second plate material at a plate material supply position and bringing the first and second plate materials into contact with each other with their side surfaces in contact with each other. A transporting means capable of moving forward and backward in the line direction with the two plate materials placed thereon, a positioning means provided to be able to move up and down for positioning the first plate material, and pressing the first plate material toward the positioning means, First pressing means for positioning the first plate material, first holding means for holding the positioned end of the first plate material on the transporting means, and pressing the second plate material toward the positioned first plate material. It is characterized by comprising a second pressing means for positioning the two plate materials, and a second holding means for holding the end of the positioned second plate material to the transport means.

Even in the case of flat slopes having different plate thicknesses, one of the plate members does not overlap with the other plate member, or
The plate members can be accurately aligned with each other without an excessively large interval. Furthermore, there is no worry about the abrasion of the roll and the deformation of the plate material edge.

According to a second aspect of the present invention, a pair of first transport means and second transport means is provided for the first plate member, and the first transport means and the second transport means are provided in pairs.
The transport means and the transport means can be independently moved forward and backward so that, when one of the transport means is transporting the first plate material, the other transport means can receive the next first plate material at the plate material supply position. A pair of a third conveying means and a fourth conveying means are prepared for the second plate member, and the third conveying means and the fourth conveying means can be moved forward and backward independently of each other. When the two plate materials are being conveyed, the other conveyance means can receive the next second plate material at the plate material supply position, so that the second plate material is relatively widened and the side surfaces are in contact with each other. The first plate member and the second plate member can be welded while being conveyed.

Since the first and second plate members which have been relatively shifted can be transported to the next step by a plurality of transport means, the plate members can be transported efficiently. Further, the first plate material and the second plate material in a state where the side surfaces are in contact with each other while being relatively shifted can be welded while being conveyed.

[Brief description of the drawings]

FIG. 1 is a plan view of a processing line according to the present invention.

FIG. 2 is a side view of a processing line according to the present invention.

FIG. 3 is a plan view of a transfer device according to the present invention.

FIG. 4 is a sectional view taken along line 4-4 in FIG. 3;

FIG. 5 is a sectional view taken along line 5-5 of FIG. 4;

FIG. 6 is an explanatory view of a procedure for shifting the width of the transfer device according to the present invention.

FIG. 7 is an explanatory view of a first transfer procedure of the transfer device according to the present invention.

FIG. 8 is an explanatory view of a second transfer procedure of the transfer device according to the present invention.

[Explanation of symbols]

1 ... processing line, 2A ... 1st board (cut plate), 2B ... 2nd
Plate material (cut plate), 3 wide plate, 30 transport device, 32 table, 40A, 40B, 40C, 40D first and second
・ Third and fourth transport means, 41A, 41B, 41C, 41
D: 1st, 2nd, 3rd, 4th rail, 42A, 42B,
42C, 42D: first, second, third, and fourth transfer tables, 50
... Positioning means, 55A, 55B ... First and second pressing means, 60A, 60B ... First and second holding means, 70 ... Welding means.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kazunori Sakamoto 1-10-1 Shinsayama, Sayama City, Saitama Prefecture Honda Engineering Co., Ltd.

Claims (2)

[Claims] 1. A transport device for transporting at least a first plate material and a second plate material relative to each other at a plate material supply position and transporting the first and second plate materials by bringing their side surfaces into contact with each other.
A transporting means capable of moving forward and backward in the line direction with the second plate material placed thereon, a positioning means provided to be able to move up and down for positioning the first plate material,
First pressing means for pressing the plate material to position the first plate material, first holding means for holding the positioned end of the first plate material to the transport means, and second plate material toward the positioned first plate material And a second holding means for holding the end of the positioned second plate material by the transfer means. 2. A first conveying means and a second conveying means for the first plate member.
A pair of transporting means are provided, and the first transporting means and the second transporting means can be moved forward and backward independently of each other. When one of the transporting means transports the first plate material, the other at the plate material supply position. The next first plate material can be received by the transport means, and the third transport means and the fourth transport means are prepared in pairs for the second plate material, and the third transport means and the fourth transport means are combined. By making it possible to move forward and backward independently of each other, and while the second plate is being conveyed by one of the conveyance means, the other conveyance means can receive the next second plate at the plate material supply position, The first in a state where the sides are relatively shifted and the side surfaces are in contact with each other
The plate material conveying device according to claim 1, wherein the plate material and the second plate material can be welded while being conveyed.