Crossing plate rotating jig

Abstract

To provide a crossing plate rotating jig capable of shortening working time and reducing working burden in welding work accompanied by rotation of a crossing plate.SOLUTION: A crossing plate rotating jig 10 rotatably supports a brace sheet BS having a base material plate BS1, and a first orthogonal plate BS2 and a second orthogonal plate BS3 joined to both surfaces of the base material plate BS1 at end surfaces thereof so as to cross the base material plate BS1. The crossing plate rotating jig 10 includes: four holding pipes 11 that are disposed on both surface sides of the first orthogonal plate BS1 and the second orthogonal plate BS2 and hold a brace sheet BS; and a set of rotating members 12 that has a rotating shaft 13 extending in the same direction as an axial direction of the holding pipe 11 and a connecting plate 14 connectable to the four holding pipes 11 and rotates the holding pipe 11 and the brace sheet BS around the rotating shaft 13, where the connecting plate 14 has a pipe connecting tool 15 to which a tip end 11a of the holding pipe 11 is fitted and a fastening tool 16 that fixes the tip end 11a.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a cross plate rotating jig, and more particularly to a cross plate rotating jig used to rotate a cross plate made of flat plate members joined together so that they cross each other. [Background technology]

[0002] Conventionally, reinforcing members called brace sheets have been used at the column-beam joints of steel frame structures, which are made up of columns and beams, in order to suppress deformation of the frame and improve the strength of the building. The brace sheet is a cross plate that includes a base plate as the base material and a pair of orthogonal plates that are ink-welded to the base plate so that they intersect and are joined to the base plate at their end faces.

[0003] The fillet welding must be performed from both sides along the joining end faces of the base plate and the orthogonal plate. Therefore, a total of four welding operations are required to weld the pair of orthogonal plates to the base plate, and there is a need to reduce the time and effort required for the welding operation. Patent Document 1 describes a welding robot that can fillet weld an orthogonal plate to a base plate. The welding robot can automatically perform welding work by driving a welding torch along a welding line connecting a preset welding start point and welding end point. Therefore, by utilizing a welding robot, the workload associated with welding work can be reduced. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2019 / 171706 Summary of the Invention [Problem to be solved by the invention]

[0005] Although the welding robot of Patent Document 1 automates welding work and reduces the burden on workers, further improvements are desired. Specifically, welding work involves repeatedly rotating the brace sheet to orient the weld line in a predetermined direction and then performing fillet welding along the weld line. Because the brace sheet weighs between 150 kg and 200 kg, a lifting machine such as a crane is required to rotate the brace sheet. As a result, when welding a total of four weld lines, the brace sheet must be rotated at least three times using a lifting machine, which increases the work time.

[0006] The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide a cross plate rotation jig that can shorten the work time and reduce the work burden in welding work that involves rotating cross plates. [Means for solving the problem]

[0007] The above problem is solved by the cross plate rotation jig of the present invention, which is a cross plate rotation jig used to rotatably support a cross plate having a base plate, a first orthogonal plate and a second orthogonal plate joined at their end faces to one side and the other side of the base plate so as to intersect with the base plate, the cross plate rotation jig comprising: four holding shaft members arranged on both sides of the first orthogonal plate and the second orthogonal plate so as to extend along the end faces of the first orthogonal plate and the second orthogonal plate, and holding the cross plate; a rotation shaft extending in the same direction as the longitudinal axis of the four holding shaft members; and connecting members connectable to the four holding shaft members, and which rotate the holding shaft members and the cross plate around the rotation shaft; and the connecting members have an interlocking coupling device into which the longitudinal end portions of the holding shaft members are fitted, and a fixed coupling device that fixes the end portions of the holding shaft members fitted into the interlocking coupling device.

[0008] According to the above configuration, the cross plate rotation jig includes four holding shaft members extending along the joining end surfaces of the orthogonal plates and a rotating member that rotates the four holding shaft members. The rotating member includes a fitting coupler into which the tip ends of the holding shaft members fit, and a fixing coupler that fixes the fitted holding shaft members. This allows the worker to support the cross plate with the four holding shaft members and rotate it without using a lifting machine. Furthermore, the worker can easily attach and detach the holding shaft members by operating the fitting coupler and fixing coupler to repeat the welding work. This makes it possible to shorten the work time and reduce the workload of welding work that involves rotating the cross plate.

[0009] Preferably, the holding shaft member has a circular cross section, and the fitting coupler has a U-shaped fitting groove into which the holding shaft member can be fitted. According to the above configuration, the worker can easily attach and detach the holding shaft member to the rotating member by fitting the holding shaft member into the U-shaped fitting groove and fixing it with the fixing connector, thereby shortening the work time and reducing the worker's workload for welding work involving the rotation of the cross plate.

[0010] In addition, the fixing connecting device may have four fasteners that fix the tip end of the retaining shaft member to the mating groove, and the fasteners may be fastened from directions that are 90 degrees apart from each other to fix the tip end of the retaining shaft member. According to the above configuration, the fasteners fasten and fix the tip ends of the retaining shaft members from directions that are 90 degrees apart from each other, so the worker can always operate the fasteners from the same direction when rotating the rotating member to attach or detach the four retaining shaft members in order, which makes it possible to shorten the work time and reduce the workload of the welding work that involves rotating the cross plate.

[0011] In addition, the cross plate rotation jig may include a support base that supports the cross plate via a set of the rotating members, and the support base may have bearing members that rotatably support the rotation shafts of each of the set of rotating members. According to the above configuration, the rotation shaft of the rotating member is rotatably supported by bearing members attached to a pair of support bases. This allows the worker to rotate the cross plate, which is a heavy object, without requiring a large amount of force. This reduces the workload involved in welding work that involves rotating the cross plate.

[0012] The bearing members may be arranged in parallel in the longitudinal direction of the rotary shaft. According to the above configuration, the rotation shaft of the rotating member is rotatably supported by a plurality of bearing members. This allows the worker to rotate the cross plate, which is a heavy object, without requiring a large amount of force. This reduces the workload of the welding work associated with rotating the cross plate.

[0013] The support base may preferably have a rotating body that supports the support base so that the support base can move. According to the above configuration, it is no longer necessary to transport the cross plate, which is a heavy object, to the support stand, so that it is possible to reduce the workload involved in welding the cross plate.

[0014] In addition, the rotating member may have four through holes formed at 90-degree intervals around the rotation axis, and the cross plate rotation jig may be provided with a rotation control member having an entry member that enters the through holes to regulate the rotation of the rotating member, and an operating member that slides and operates the entry member. According to the above configuration, the rotation of the rotating member can be easily restricted by operating the operating member to perform welding work, thereby making it possible to shorten the working time and reduce the workload of welding work involving the rotation of cross plates. [Effects of the Invention]

[0015] According to the cross plate rotation jig of the present invention, it is possible to shorten the working time and reduce the workload of welding work involving the rotation of cross plates. [Brief explanation of the drawings]

[0016] [Figure 1]FIG. 10 is a perspective view of the brace sheet and the cross plate rotation jig. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II of FIG. [Figure 3] FIG. 10 is a perspective view of a cross plate rotation jig that rotates and supports the brace sheet. [Figure 4] FIG. [Figure 5] FIG. 2 is a partially exploded perspective view of a main part of the cross plate rotating jig. [Figure 6] FIG. 4 is a perspective view showing a fixing structure of a rotating member to a support base. [Figure 7] FIG. 10 is a diagram showing the flow of welding work for a brace sheet. [Figure 8] FIG. 10 is a perspective view of the brace sheet and cross plate rotation jig during welding. [Figure 9] 9 is a cross-sectional view taken along line IX-IX in FIG. 8. DETAILED DESCRIPTION OF THE INVENTION

[0017] A cross plate rotation jig 10 according to one embodiment of the present invention (hereinafter referred to as the present embodiment) will be described below with reference to Figures 1 to 9. However, the embodiment described below is merely an example for facilitating understanding of the present invention and is not intended to limit the present invention. In other words, the present invention may be modified or improved without departing from the spirit thereof, and of course, the present invention also includes equivalents thereof.

[0018] <Outline of the brace sheet BS and cross plate rotation jig 10> First, the brace sheet BS and the cross plate rotation jig 10 will be outlined. FIG. 1 shows a brace sheet BS rotatably supported by a cross plate rotation jig 10. The brace sheet BS is a reinforcing member fixed to a column-beam joint to suppress deformation of the columns and beams and improve the strength of a steel structure consisting of columns and beams. The brace sheet BS has a base plate BS1 as a base material, and a first orthogonal plate BS2 and a second orthogonal plate BS3 that join to the base plate BS1 at their end faces. In FIG. 1, the first orthogonal plate BS2 and the second orthogonal plate BS3 are tack-welded to one side and the other side of the base plate BS1 at opposing positions so as to perpendicularly intersect the base plate BS1. The brace sheet BS corresponds to a cross plate.

[0019] 2, the first orthogonal plate BS2 is finally fixed to the base plate BS1 by fillet welding the welds WP1 and WP2 on both sides along the joining end surface BS2a. The joining end surface BS2a corresponds to the end surface of the first orthogonal plate BS2. Similarly, the second orthogonal plate BS3 is finally fixed to the base plate BS1 by fillet welding the welds WP3 and WP4 on both sides along the joining end surface BS3a, which corresponds to the end surface of the second orthogonal plate BS3.

[0020] The cross-plate rotating jig 10 is a rotating jig that rotatably supports the brace sheet BS in the direction indicated by arrow A in FIG. 2 in order to sequentially weld the welded portions WP1, WP2, WP3, and WP4. Specifically, as shown in FIG. 3, the cross-plate rotating jig 10 first supports the brace sheet BS at an angle such that the welded portion WP1 faces upward. At this time, the base plate BS1 and the first orthogonal plate BS2 are inclined at an angle of 45 degrees relative to the horizontal. In addition, the holding pipe 11 facing the welded portion WP1 is detached from the rotating member 12. This improves the workability when fillet welding the welded portion WP1 from above.

[0021] Next, the removed holding pipe 11 is attached to the rotating member 12, and then the brace sheet BS is rotated 90 degrees and supported at an angle where the welded portion WP2 faces upward. Subsequently, the holding pipe 11 facing the welded portion WP2 is removed, and fillet welding is performed on the welded portion WP2 from above.

[0022] Next, the removed holding pipe 11 is attached to the rotating member 12, and then the brace sheet BS is rotated 90 degrees again so that the welded portion WP3 is supported at an angle facing upward. Subsequently, the holding pipe 11 facing the welded portion WP3 is removed, and fillet welding is performed on the welded portion WP3 from above.

[0023] Next, the removed holding pipe 11 is attached to the rotating member 12, and then the brace sheet BS is rotated 90 degrees again and supported at an angle so that the welded portion WP4 faces upward. Finally, the holding pipe 11 facing the welded portion WP4 is removed, and fillet welding is performed on the welded portion WP4 from above.

[0024] As described above, by using the cross plate rotation jig 10, it is possible to rotate the brace sheet BS weighing 150 kg to 200 kg without using a lifting machine and perform fillet welding in the order of welds WP1, WP2, WP3, and WP4. This makes it possible to shorten the work time and reduce the workload when welding the brace sheet BS.

[0025] <Cross plate rotation jig 10> Next, the cross-plate rotation jig 10 will be described with reference to Fig. 4. Fig. 4 shows a perspective view of the cross-plate rotation jig 10. The cross-plate rotation jig 10 mainly comprises four holding pipes 11, a rotating member 12 that rotatably supports the holding pipes 11, a bearing member 17, a rotation restricting member 18, and a support base 19.

[0026] <<Holding pipe 11>> The holding pipes 11 are arranged on both sides of the first orthogonal plate BS2 and the second orthogonal plate BS3 so as to extend along the joint end faces BS2a, BS3a (see FIG. 2), and are long shaft members that hold the brace sheet BS. The holding pipes 11 are round steel pipes with a circular cross section. By using round pipe members for the holding pipes 11, interference between the thick portions (weld beads) created by welding and the holding pipes 11 can be prevented, making it possible to stably hold the brace sheet BS. The holding pipes 11 correspond to holding shaft members.

[0027] <<Rotating member 12>> Next, the rotating member 12 will be described with reference to Fig. 5. Fig. 5 is a perspective view of the rotating member 12. The rotating member 12 mainly comprises a rotating shaft 13, a connecting plate 14, a pipe connector 15, and a fastener 16, and serves to rotate the four holding pipes 11 and the brace sheet BS around the rotating shaft 13.

[0028] The rotating shaft 13 is a long shaft member that is rotatably supported by a bearing member 17 (described later) and functions as the rotation center of the cross plate rotating jig 10. The rotating shaft 13 extends in the same direction as the axial direction of the holding pipe 11. The connecting plate 14 is a connecting member that connects the rotating shaft 13 and the four holding pipes 11. Explaining in more detail, the connecting plate 14 is a circular plate-shaped member (circular plate) that connects to the rotating shaft 13 at its center, while four pipe connectors 15 that connect to the tip ends 11a of the four holding pipes 11 are attached to its periphery. More specifically, the four pipe connectors 15 are attached to the periphery of the connecting plate 14 at positions spaced 90 degrees apart from one another.

[0029] The pipe coupler 15 has a U-shaped fitting groove 15a that can fit onto the tip end 11a of the holding pipe 11, and a fastener insertion hole 15b that can be screwed onto a fastener 16. Therefore, an operator can secure the holding pipe 11 to the pipe coupler 15 by fitting the tip end 11a of the holding pipe 11 into the fitting groove 15a of the pipe coupler 15 and inserting the fastener 16 into the fastener insertion hole 15b and fastening it. Here, the "U-shape" does not necessarily have to be strictly U-shaped, and includes a shape that can fit the holding pipe 11, which has a circular cross-sectional shape. The pipe coupler 15 corresponds to a fitting coupler, and the fastener 16 corresponds to a fixed coupler.

[0030] The fastener 16 has a fastener body 16a and an operating knob 16b. An operator can easily secure the holding pipe 11 by inserting the fastener body 16a into the fastener insertion hole 15b and the through-hole 11b formed in the tip 11a of the holding pipe 11 and rotating the operating knob 16b. The four fasteners 16 can be fastened from directions that differ by 90 degrees to secure the tip 11a of the holding pipe 11 to the pipe connector 15. The fitting grooves 15a of the pipe connector 15 are formed so that the holding pipes 11 can be inserted from directions that differ by 90 degrees. Therefore, the four holding pipes 11 can be attached and detached by rotating the rotating member 12 90 degrees around the rotating shaft 13 and operating the fasteners 16 to attach and detach the holding pipes 11 in the same procedure. This facilitates attachment and detachment of the holding pipes 11, improving workability.

[0031] Four through holes 14a are formed in the connecting plate 14. The through holes 14a have a size that allows slide rods 18a of a rotation restricting member 18, which will be described later, to enter through the through holes 14a. The rotation restricting member 18 and the slide rods 18a will be described later with reference to FIG.

[0032] <<Bearing member 17>> Next, the bearing member 17 will be described with reference to Fig. 6. The bearing member 17 is a bearing box 17b having a ball bearing 17a, and supports the rotating shaft 13 rotatably relative to the support base 19. The bearing box 17b is a pillow-type bearing box, and is firmly fixed to the support base 19 via a fixing portion 17c. This makes it possible to stably support the brace sheet BS, which has a large weight, relative to the support base 19.

[0033] The bearing members 17 are arranged side by side in the axial direction of the rotating shaft 13. Although two bearing members 17 are shown in Figure 6, the number of bearing members 17 is not limited to two. The rotating shaft 13 may be rotatably supported by three or more bearing members 17. By supporting the rotating shaft 13 with multiple bearing members 17 in this way, it becomes possible to rotatably support a brace sheet BS with a greater weight. Furthermore, although the bearing member 17 has been described as having a ball bearing 17a, it is not limited to this. The bearing member 17 may have a roller bearing as long as it can rotatably support the brace sheet BS.

[0034] <<Rotation restriction member 18>> Next, the rotation restricting member 18 will be described. The rotation restricting member 18 can restrict or release the rotation of the rotating member 12. More specifically, the rotation restricting member 18 has a slide rod 18a, an operating handle 18b, and a rotation shaft 18c. An operator can rotate the operating handle 18b around the rotation shaft 18c to slide the slide rod 18a into the through-hole 14a of the connecting plate 14. This makes it possible to restrict the rotation of the connecting plate 14. In addition, an operator can operate the operating handle 18b to slide the slide rod 18a and retract it from the through-hole 14a of the connecting plate 14. This makes it possible to release the restriction on the rotation of the connecting plate 14. The slide rod 18a corresponds to the inserting member, and the operating handle 18b corresponds to the operating member.

[0035] The rotation restricting members 18 are arranged side by side at positions sandwiching the rotation shaft 13, and the slide rods 18a can be inserted into the two through holes 14a formed at positions spaced 180 degrees apart from each other. This makes it possible to restrict the rotation of the connecting plate 14 more reliably.

[0036] <<Support stand 19>> Next, returning to Figure 1, the support base 19 will be described. The support base 19 supports the brace sheet BS via the holding pipe 11 and the rotating member 12. The support base 19 mainly comprises an upper support 20, a lower support 21 that supports the upper support 20, and a caster 22 that supports the lower support 21.

[0037] The upper support body 20 is composed of two H-shaped steel beams that respectively support the two rotating members 12. Specifically, the upper support body 20 has an upper flange 20a, a web 20b, and a lower flange 20c. Bearing members 17 are arranged on the upper flange 20a in the direction in which the rotating shaft 13 extends, and rotation restricting members 18 are arranged in parallel at positions that sandwich the rotating shaft 13.

[0038] The lower support 21 is made up of two H-shaped steel beams that support the upper support 20. The lower support 21 has an upper flange 21a, a web 21b, and a lower flange 21c. The upper support 20 is fixed onto the upper flange 21a by welding. Meanwhile, the casters 22 are attached to the lower flange 21c.

[0039] Casters 22 provided at the four corners below the lower support 21 support the support base 19 so that it can move. The casters 22 allow the support base 19 to be easily moved, eliminating the need to carry the brace sheet BS, which is a heavy object, to the position of the support base 19. This reduces the workload of workers. The casters 23 correspond to rotating bodies.

[0040] As described above, by constructing the support base 19 using H-shaped steel, which has high strength and is easily available, it is possible to suppress an increase in the cost of the cross plate rotation jig 10. However, the support base 19 does not have to be constructed from H-shaped steel as long as it can rotatably support the brace sheet BS via the holding pipe 11 and the rotating member 12. Furthermore, although the support base 19 has been described as having the upper support body 20 and the lower support body 21, it may have only one of the upper support body 20 and the lower support body 21.

[0041] <Brace sheet BS welding work flow> Next, the flow of welding work for the brace sheet BS will be described, assuming that welding work is performed in the order of the welded portions WP1, WP2, WP3, and WP4 described with reference to FIG. 7 shows the flow of welding work for the brace sheet BS. As shown in FIG. 7, first, the worker supports the brace sheet BS with a cross-plate rotation jig 10 (step S10). Specifically, the worker clamps the brace sheet BS with holding pipes 11 and connects the holding pipes 11 to a rotating member 12. This causes the brace sheet BS to be rotatably supported by the cross-plate rotation jig 10. Note that before supporting the brace sheet BS with the cross-plate rotation jig 10, the cross-plate rotation jig 10 may be moved to a predetermined work area.

[0042] Next, the worker removes the holding pipe 11 facing the welded portion WP1 from the rotating member 12 (step S11). Specifically, the worker rotates the operation knob 16b to pull the fastener 16 out of the fastener insertion hole 15b, and removes the holding pipe 11 from the pipe connector 15. This prevents the holding pipe 11 from interfering with the welding operation on the welded portion WP1.

[0043] Next, the worker rotates the brace sheet BS around the rotation axis 13 (step S12). Specifically, the worker rotates the brace sheet BS by manipulating the base plate BS1, the first orthogonal plate BS2, or the second orthogonal plate BS3 so that the welded portion WP1 is positioned upward. As a result, the base plate BS1, the first orthogonal plate BS2, and the second orthogonal plate BS3 are inclined at an angle of 45 degrees relative to the horizontal plane (see FIG. 3).

[0044] Next, the worker operates the rotation restriction members 18 to temporarily fix the angular position of the brace sheet BS (step S13). Specifically, the operating handles 18b of the two rotation restriction members 18 are operated in sequence, and the two slide rods 18a are inserted into the two through holes 14a of the connecting plate 14, respectively. This temporarily fixes the rotation angle of the rotating member 12.

[0045] Next, the worker performs welding on the welded portion WP1 (step S14). Specifically, the worker performs fillet welding on the welded portion WP1 along the joining end surface BS2a of the first orthogonal plate BS2 to finally fix the first orthogonal plate BS2 to the base plate BS1. The welding may be performed by the worker himself or by a welding robot WR.

[0046] 8 and 9 show a state in which the welded portion WP1 is being welded using a welding robot WR. The welding robot WR performs fillet welding on the welded portion WP1 while moving along the joining end surface BS2a on the upper surface of the first orthogonal plate BS2. The welding robot WR mainly comprises a welding machine main body WR1, a welding torch WR2, a lower wheel WR3, and a side wheel WR4.

[0047] The operator inputs the required settings into the welding machine body WR1. This causes the welding robot WR to travel from the welding start point to the welding end point, bringing the tip of the welding torch WR2 close to the welded part WP1 to perform a fillet weld. Here, the base plate BS1, first orthogonal plate BS2, and second orthogonal plate BS3 of the brace sheet BS are inclined at a 45-degree angle relative to the horizontal. This allows the welding robot WR to travel stably while keeping the lower wheel WR3 and side wheel WR4 in contact with the base plate BS1, first orthogonal plate BS2, or second orthogonal plate BS3.

[0048] Subsequently, because the welding work of the welded portion WP2 is not completed (step S15), the worker returns to step S11 to attach and detach the holding pipe 11. Specifically, the worker attaches the removed holding pipe 11 to a position facing the welded portion WP1, and then removes the holding pipe 11 facing the welded portion WP2 from the rotating member 12.

[0049] Next, the worker rotates the brace sheet BS around the rotation axis 13 (step S12). Specifically, the worker first operates the operating handle 18b to pull the slide rod 18a of the rotation restriction member 18 out of the through-hole 14a. Next, the worker rotates the brace sheet BS by 90 degrees by operating the base plate BS1, the first orthogonal plate BS2, or the second orthogonal plate BS3 so that the welded portion WP2 is positioned upward.

[0050] Next, the worker temporarily fixes the angular position of the brace sheet BS using the rotation restricting member 18 (step S13), and performs welding work on the welded portion WP2 (step S14). The welding work may be performed by the worker himself or by the welding robot WR described above.

[0051] Subsequently, since the welding work of the welded portion WP3 has not been completed (step S15), the worker repeats steps S11 to S14 to perform the welding work of the welded portion WP3. Finally, the worker repeats steps S11 to S14 to perform the welding work on the welded part WP4.

[0052] This completes the fillet welding for welds WP1, WP2, WP3, and WP4, completing the welding work for the brace sheet BS. This allows the brace sheet BS to be rotated without using a lifting machine, shortening the work time and reducing the workload involved in welding work that involves rotating the cross plates.

[0053] The above describes the cross plate rotation jig 10 according to one embodiment of the present invention. However, the above-described embodiment is merely an example to facilitate understanding of the present invention and does not limit the present invention. In the above-described embodiment, the cross plate rotation jig 10 has been described as being used to rotate the brace sheet BS, which is a reinforcing member, but is not limited to this. The cross plate rotation jig 10 of the present invention can be used to rotate a construction plate that can be held by four holding pipes 11 extending in the same direction as the rotation axis 13.

[0054] In the above-described embodiment, the pipe connector 15 has a fitting groove 15a, and the holding pipe 11 is inserted into or removed from the opening of the fitting groove 15a. However, this is not limited to this. The pipe connector 15 may have a fitting hole, and the holding pipe 11 may be inserted or removed by sliding the holding pipe 11 in the axial direction through the opening of the fitting hole. Even in this case, the holding pipe 11 can be easily attached to or detached from the pipe connector 15.

[0055] In the above-described embodiment, the welding robot WR performs fillet welding while traveling on the upper surface of the brace sheet BS. However, this is not limited to this. A travel support jig for supporting the travel of the welding robot WR may be attached to the brace sheet BS, and the welding robot WR may travel on the upper surface of the travel support jig. This allows the welding robot WR to travel more stably, thereby improving the quality of the welding work.

[0056] In the above-described embodiment, the welding work is performed with the base plate BS1, the first orthogonal plate BS2, and the second orthogonal plate BS3 of the brace sheet BS tilted at 45 degrees relative to the horizontal plane, but this is not limiting. As long as the welding robot WR can stably travel along the base plate BS1 and the first orthogonal plate BS2 or the second orthogonal plate BS3, the tilt angle relative to the horizontal plane may be an angle other than 45 degrees (for example, 20 degrees, 55 degrees, etc.).

[0057] In the above-described embodiment, the fixing connector is described as a fastening member, but is not limited to this. Any known locking mechanism may be used as long as it can fix the tip 11a of the holding pipe 11 fitted into the fitting groove 15a. [Explanation of symbols]

[0058] 10 Cross plate rotation jig 11 Holding pipe (holding shaft member) 11a Tip 11b Through hole 12 Rotating member 13 Rotation axis 14 Connecting plate (connecting member) 14a Through hole 15 Pipe connectors (fitting connectors) 15a Fitting groove 15b Fastener insertion hole 16 Fasteners (fixed connectors) 16a Fastener body 16b Operation knob 17 Bearing materials 17a Ball bearing 17b Bearing box 17c Fixed part 18 Rotation restriction member 18a Slide rod (entrance member) 18b Operating handle (operating member) 18c Rotation axis 18d Link mechanism 19 Support stand 20 Upper support 20a Web 20b Upper flange 20c bottom flange 21 Lower support 21a Web 21b Upper flange 21c Lower flange 22 Caster (rotating body) BS brace sheet BS1 base plate BS2 First orthogonal plate BS2a Joint end face (end face) BS3 Second orthogonal plate BS3a joint end face (end face) WP1, WP2, WP3, WP4 welds WR welding robot WR1 welding machine body WR2 Welding Torch WR3 lower wheels WR4 side wheels

Claims

1. A cross plate rotation jig used to rotatably support a cross plate having a base plate and a first orthogonal plate and a second orthogonal plate joined at their end surfaces to one surface and the other surface of the base plate so as to intersect with the base plate, four holding shaft members disposed on both sides of the first orthogonal plate and the second orthogonal plate so as to extend along the end surface of the first orthogonal plate and the end surface of the second orthogonal plate, and which hold the cross plates; a set of rotating members including a rotating shaft extending in the same direction as the axial direction of the four holding shaft members and a connecting member connectable to the four holding shaft members, the rotating member rotating the holding shaft members and the cross plate around the rotating shaft; A cross plate rotation jig characterized in that the connecting member has a fitting connecting device into which the axial tip end of the retaining shaft member fits, and a fixing connecting device that fixes the tip end of the retaining shaft member fitted into the fitting connecting device.

2. The retaining shaft member has a circular cross-sectional shape, 2. The cross plate rotating jig according to claim 1, wherein the fitting connector has a U-shaped fitting groove into which the holding shaft member can be fitted.

3. the fixing coupling device has four fasteners that fix the tip end portion of the holding shaft member to the fitting groove, 3. The cross plate rotation jig according to claim 2, wherein the fasteners are fastened from directions that are different from each other by 90 degrees to fix the tip end of the holding shaft member.

4. the cross plate rotating jig includes a support base that supports the cross plate via a set of the rotating members; 2. The cross plate rotating jig according to claim 1, wherein the support base has bearing members that rotatably support the rotation shafts of the pair of rotation members.

5. 5. The cross plate rotating jig according to claim 4, wherein the bearing members are arranged in parallel in the axial direction of the rotating shaft.

6. 5. The cross plate rotating jig according to claim 4, wherein the support base has a rotating body that supports the support base so that the support base can move.

7. the rotating member has four through holes formed at 90-degree intervals around the rotation axis, The cross plate rotation jig according to claim 1, characterized in that the cross plate rotation jig is provided with a rotation regulating member having an entry member that enters the through hole and regulates the rotation of the rotation member, and an operating member that slides and operates the entry member.

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