Rotary jig

Abstract

To provide a rotary jig that can rotate a cross plate without using a lifting machine, and can achieve shortening an operation time and reducing workload.SOLUTION: A rotary jig 10 rotatably supports a brace sheet BS which has a base material plate BS1, and a first orthogonal plate BS2 and a second orthogonal plate BS3 connected on end surfaces to both surfaces of the base material plate BS1 so as to cross the base material plate BS1. The rotary jig 10 includes: four holding shaft members 11 arranged at both surface sides of the first orthogonal plate BS2 and the second orthogonal plate BS3, and holding the brace sheet BS; a pair of rotary shaft members 12 for connecting the four holding shaft members 11 in both end portions of the four holding shaft members 11, and having a rotary shaft 15 extending in the same direction as the axial direction of the four holding shaft members 11; and a pair of support members 16 arranged on a pair of frames ST and rotatably supporting the pair of rotary shaft members 12.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a rotary jig, and more particularly to a rotary jig used for rotating an intersecting plate in which flat plates are joined so as to intersect each other.

Background Art

[0002] Conventionally, at the column-beam joint of a steel structure having columns and beams as a framework, a reinforcing member called a brace sheet has been used for the purpose of suppressing deformation of the framework and improving the strength of the building. The brace sheet is an intersecting plate having a base material plate as a base material and a pair of orthogonal plates that are fillet-welded so as to intersect the base material plate and are joined to the base material plate at the end face.

[0003] The above-mentioned fillet welding needs to be performed from both sides along the joint end faces of the base material plate and the orthogonal plates. Therefore, in order to weld and fix a pair of orthogonal plates to the base material plate, a total of four welding operations have to be performed, and shortening the time and reducing the burden of the welding work have been desired. Patent Document 1 describes a welding robot capable of performing fillet welding of orthogonal plates to a base material 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 a welding end point. Therefore, by utilizing the welding robot, the work burden related to the welding work can be reduced.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Although the welding operation can be automated by the welding robot described in Patent Document 1, reducing the burden on the operator, further improvement has been desired. Specifically, the welding operation is performed by repeating an operation of rotating the brace sheet to direct the welding line in a predetermined direction and an operation of performing fillet welding on the welding line. Here, since the brace sheet is a heavy object weighing from 150 kg to 200 kg, a hoisting machine such as a crane is required to rotate the brace sheet. As a result, when performing the welding operation on a total of four welding lines, the brace sheet has to be rotated at least three times using the hoisting machine, leading to an increase in the working time.

[0006] The present invention has been made in view of the above problems, and an object of the present invention is to provide a rotary jig capable of rotating an intersecting plate without using a hoisting machine, shortening the working time, and reducing the working burden.

Means for Solving the Problems

[0007] According to the rotary jig of the present invention, the above problem is solved by using a rotary jig for rotatably supporting an intersecting plate having a base plate, a first orthogonal plate and a second orthogonal plate joined at end faces to one surface and the other surface of the base plate so as to intersect the base plate, the rotary jig including: four holding shaft members disposed on both sides of each of the first orthogonal plate and the second orthogonal plate so as to extend along the end face of the first orthogonal plate and the end face of the second orthogonal plate for holding the intersecting plate; a set of rotary shaft members having a rotary shaft that connects the four holding shaft members at both ends of the four holding shaft members and extends in the same direction as the axial direction of the four holding shaft members; and a set of support members disposed on each of a set of gantries for rotatably supporting the set of rotary shaft members.

[0008] According to the above configuration, the rotation jig includes four holding shaft members extending along the joint end surface of the orthogonal plate, a rotating shaft member having a rotating shaft that connects and rotates the four holding shaft members, and a support member that supports the rotating shaft member. Therefore, the intersecting plate can be rotatably supported about the rotating shaft. As a result, the intersecting plate can be rotated without using a hoisting machine, and it is possible to shorten the working time and reduce the working burden.

[0009] Further, the rotating shaft member may have a connector that detachably connects the holding shaft member and a detaching and attaching operation tool that is operated when detaching and attaching the holding shaft member. According to the above configuration, the holding shaft member is detachably connected to the rotating shaft member and can be easily detached by operating the detaching and attaching operation tool. Therefore, it is possible to connect the holding shaft member to the rotating shaft member to rotatably support the intersecting plate, and to improve the workability when removing the holding shaft member from the rotating shaft member to perform welding work.

[0010] Further, the holding shaft member may have a holding shaft body having a circular cross-sectional shape. According to the above configuration, it is possible to prevent interference between the thick portion (weld bead) formed by welding and the holding shaft member. As a result, it is possible to stably hold the intersecting plate by the holding shaft member.

[0011] Further, the rotation jig may include a rotation position fixing member that engages with a first engaging portion formed on the rotating shaft member and a second engaging portion formed on the support member, and fixes the rotation position of the rotating shaft member with respect to the support member. According to the above configuration, the rotation position of the rotating shaft member can be fixed by the rotation position fixing member. Therefore, the intersecting plate can be fixed at a rotation position suitable for welding work, and it is possible to improve the workability in the welding work.

[0012] Further, the rotation position fixing member may fix the rotation position of the rotating shaft member at an angle at which the base material plate has a predetermined inclination angle with respect to the horizontal plane. According to the above configuration, when welding the cross plate by the welding robot, it becomes possible to stably run the welding robot along the welding line.

[0013] Further, the center of the rotation axis is preferably located at the center of the axial centers of the four holding shaft members, and the support member preferably has a V-shaped groove extending in the axial direction of the rotation axis. According to the above configuration, the rotation axis is stably supported by the V-shaped groove extending in its axial direction and can rotate smoothly with respect to the V-shaped groove, so that it is possible to reduce the working burden in the rotation operation of the cross plate.

[0014] Further, a rotation axis hole through which the rotation axis is inserted is preferably formed in the support member, and a dropout restricting tool for restricting the dropout of the rotation axis from the rotation axis hole is preferably provided in the V-shaped groove. According to the above configuration, it is possible to prevent the rotation axis from falling out of the rotation axis hole by the dropout restricting tool, and it is possible to improve workability.

[0015] Further, the support member preferably has a rolling bearing having an inner ring into which the rotation axis can be inserted. According to the above configuration, since the rotation axis is rotatably supported by the rolling bearing, it can rotate smoothly, and it is possible to reduce the working burden in the rotation operation of the cross plate.

Effect of the Invention

[0016] According to the rotation jig of the present invention, it is possible to rotate the cross plate without using a hoisting machine, thereby shortening the working time and reducing the working burden.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0018] Hereinafter, with reference to FIGS. 1 to 8, the rotary jig 10 according to an embodiment of the present invention (hereinafter, this embodiment) will be described. However, the embodiment described below is merely an example for facilitating the understanding of the present invention and does not limit the present invention. That is, the present invention can be changed and improved without departing from its gist, and it goes without saying that equivalents of the present invention are included therein.

[0019] <Overview of the Brace Sheet BS and the Rotary Jig 10> First, the overview of the brace sheet BS and the rotary jig 10 will be described. FIG. 1 shows a brace sheet BS rotatably supported by left and right gantries ST by a rotary jig 10. The brace sheet BS is a reinforcing member fixed to the column-beam joint in order to suppress deformation of the column and the beam and improve the strength of the steel frame structure composed of the column and the beam. The brace sheet BS has a base material plate BS1 as a base material, and a first orthogonal plate BS2 and a second orthogonal plate BS3 joined to the base material plate BS1 at the end face. In FIG. 1, the first orthogonal plate BS2 and the second orthogonal plate BS3 are temporarily welded (tack welded) so as to intersect perpendicularly to the base material plate BS1 at opposing positions on one surface and the other surface of the base material plate BS1.

[0020] As shown in FIG. 2, the first orthogonal plate BS2 is fixedly attached to the base plate BS1 by fillet welding the weld portions WP1 and WP2 on both sides thereof along the joint end face BS2a. The joint end face BS2a corresponds to the end face of the first orthogonal plate BS2. Similarly, the second orthogonal plate BS3 is fixedly attached to the base plate BS1 by fillet welding the weld portions WP3 and WP4 on both sides thereof along the joint end face BS3a. The joint end face BS3a corresponds to the end face of the second orthogonal plate BS3.

[0021] The rotation jig 10 is a rotation jig that rotatably supports the brace sheet BS in the direction indicated by the arrow A in FIG. 2 in order to sequentially weld the weld portions WP1, WP2, WP3, and WP4. Specifically, as shown in FIG. 3, first, the rotation jig 10 supports the brace sheet BS at an angle such that the weld 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 with respect to the horizontal plane. Also, the holding shaft member 11 facing the weld portion WP1 is removed from the rotating shaft member 12. This improves the workability when performing fillet welding on the weld portion WP1 from above.

[0022] Next, after the removed holding shaft member 11 is attached to the rotating shaft member 12, the brace sheet BS is rotated 90 degrees and supported at an angle such that the weld portion WP2 faces upward. Subsequently, the holding shaft member 11 facing the weld portion WP2 is removed, and fillet welding is performed on the weld portion WP2 from above.

[0023] Next, after the removed holding shaft member 11 is attached to the rotating shaft member 12, the brace sheet BS is rotated 90 degrees again and supported at an angle such that the weld portion WP3 faces upward. Subsequently, the holding shaft member 11 facing the weld portion WP3 is removed, and fillet welding is performed on the weld portion WP3 from above.

[0024] Next, after the removed holding shaft member 11 is attached to the rotating shaft member 12, the brace sheet BS is rotated 90 degrees again, and is supported at an angle where the welding part WP4 faces upward. Finally, the holding shaft member 11 facing the welding part WP4 is removed, and fillet welding is performed from above on the welding part WP4.

[0025] As described above, by using the rotating jig 10, it is possible to rotate the brace sheet BS having a weight of 150 kg to 200 kg without using a hoisting machine, and perform fillet welding in the order of the welding parts WP1, WP2, WP3, and WP4. Therefore, it is possible to shorten the working time and reduce the working burden in the welding operation of the brace sheet BS. The brace sheet BS corresponds to the cross plate.

[0026] <Rotating jig 10> Next, the rotating jig 10 will be described with reference to FIGS. 4 and 5. FIG. 4 shows a perspective view of the rotating jig 10, and FIG. 5 shows an exploded perspective view of the rotating jig 10. The rotating jig 10 includes four holding shaft members 11 for holding the brace sheet BS, a set of rotating shaft members 12, a set of support members 16 fixed to the gantry ST, and a set of rotation position fixing members 20.

[0027] <<Holding shaft member 11>> The holding shaft member 11 is a long shaft member that is disposed 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 and BS3a, and holds the brace sheet BS. The holding shaft member 11 has a holding shaft main body 11a having a long shape and fixing brackets 11b disposed at both ends of the holding shaft main body 11a. The holding shaft main body 11a is a round pipe material having a circular cross-sectional shape. By using the holding shaft main body 11a as a round pipe material, it is possible to prevent the thick portion (weld bead) generated by welding from interfering with the holding shaft main body 11a, and it becomes possible to stably hold the brace sheet BS.

[0028] The fixing fitting 11b is a metal plate that fixes the holding shaft member 11 to a rotating shaft member 12 described later. A fixing through-hole 11c is formed in the fixing fitting 11b (see Fig. 5). By inserting and fastening the fastening shaft portion 14b of the fastening knob 14 through the fixing through-hole 11c and a connection hole 13b formed in a connecting tool 13a of a connecting plate 13 described later, the holding shaft member 11 is connected to the connecting plate 13. Although two fixing through-holes 11c are formed in the fixing fitting 11b, it is not limited thereto. One fixing through-hole 11c may be formed, or three or more fixing through-holes 11c may be formed. It is only necessary that the fastening shaft portion 14b is inserted into any one of the one or more fixing through-holes 11c.

[0029] The rotating jig 10 can rotatably support a plurality of types of brace sheets BS having different plate thicknesses. In other words, the four holding shaft members 11 may be connected to the rotating shaft member 12 at intervals larger than the plate thickness of the brace sheet BS. By increasing the interval between the four holding shaft members 11, when attaching and detaching the holding shaft member 11 with respect to the rotating shaft member 12, the operation of the operated portion 14a of the fastening knob 14 becomes easy.

[0030] <<Rotating shaft member 12>> The rotating shaft member 12 connects the four holding shaft members 11 at both ends of the four holding shaft members 11. The rotating shaft member 12 includes a connecting plate 13 that detachably connects the four holding shaft members 11, a fastening knob 14 that is operated when attaching and detaching the holding shaft member 11, and a rotating shaft 15 that extends in the same direction as the axial direction of the holding shaft member 11. The connecting plate 13 is a circular metal plate joined to the end of the rotating shaft 15. Four connecting tools 13a are attached to the peripheral edge of the connecting plate 13 at intervals of 90 degrees in the circumferential direction. The connecting tool 13a is a metal plate that connects to the holding shaft member 11. Two connecting holes 13b are formed in the connecting tool 13a.

[0031] In addition, positioning holes 13c are formed between the connectors 13a of the connecting plate 13. The positioning holes 13c are used to fix the rotational position of the rotary shaft member 12 by inserting a rotational position fixing member 20, which will be described later. The positioning holes 13c correspond to the first engaging portion. The rotational position fixing member 20 will be described later.

[0032] The fastening knob 14 has an operated portion 14a and a fastening shaft portion 14b, and is operated when attaching / detaching the holding shaft member 11 to / from the rotary shaft member 12. The operated portion 14a is an operating knob for rotating the fastening shaft portion 14b. The fastening shaft portion 14b is inserted through a fixing through hole 11c formed in the fixing fitting 11b and a connecting hole 13b formed in the connector 13a to fasten and fix both of them. The fastening knob 14 corresponds to an attaching / detaching operating tool.

[0033] The rotary shaft 15 is a shaft member extending in the same direction as the axial direction of the holding shaft main body 11a. The center (axis) of the rotary shaft 15 is located at the center of the axes of the four holding shaft members 11. The rotary shaft 15 is inserted through a rotary shaft hole 17a, which will be described later, and is rotatably supported by a V-shaped bearing plate 18.

[0034] <<Support member 16>> The support member 16 rotatably supports the rotary shaft member 12 with respect to the gantry ST. The support member 16 has a portal plate 17 standing vertically from the upper surface of the gantry ST, a V-shaped bearing plate 18 extending in the same direction as the axial direction of the rotary shaft 15 on the upper surface of the gantry ST, and a dropout restricting fitting 19 attached to the V-shaped bearing plate 18. The support member 16 is fixed to the gantry ST by welding, but is not limited thereto. The support member 16 may be detachably disposed with respect to the gantry ST.

[0035] A rotary shaft hole 17a through which the rotary shaft 15 can be inserted is formed in the portal plate 17. The rotary shaft hole 17a has a diameter slightly larger than the diameter of the rotary shaft 15. Further, the portal-shaped plate 17 has a positioning groove 17b extending in a direction separated from the center of the rotation shaft hole 17a by 90 degrees from each other above the rotation shaft hole 17a. The positioning groove 17b is used to position the rotation position of the rotation shaft member 12 by inserting a rotation position fixing member 20 described later. The positioning groove 17b corresponds to the second engaging portion. The rotation position fixing member 20 will be described later.

[0036] The V-shaped bearing plate 18 rotatably supports the rotating shaft 15. The V-shaped bearing plate 18 has a V-shaped groove 18a extending in the same direction as the axial direction of the rotating shaft 15, and a pair of inclined plates 18b formed on both sides of the V-shaped groove 18a. The V-shaped groove 18a and the inclined plates 18b stably receive the rotating shaft 15 and enable the rotating shaft 15 to be smoothly supported rotatably.

[0037] The dropout prevention fitting 19 is a curved fitting that prevents the rotating shaft 15 from dropping out of the V-shaped groove 18a of the V-shaped bearing plate 18. More specifically, when the holding shaft member 11 is attached to and detached from the rotating shaft member 12 without holding the brace sheet BS, the rotating shaft 15 may lift off from the V-shaped groove 18a of the V-shaped bearing plate 18 and drop out of the support member 16. Therefore, by attaching the dropout prevention fitting 19 to the V-shaped bearing plate 18 so as to be interposed between the pair of inclined plates 18b, it is possible to prevent the lifting of the rotating shaft 15 and prevent the rotating shaft 15 from dropping out of the V-shaped groove 18a. The dropout prevention fitting 19 corresponds to the dropout prevention device.

[0038] <<Rotating Position Fixing Member 20>> The rotating position fixing member 20 has a substantially U-shaped shape and is a fixing member that fixes the rotating position of the brace sheet BS. More specifically, the rotating position fixing member 20 is inserted into the positioning hole 13c of the connecting plate 13 and the positioning groove 17b formed in the portal-shaped plate 17 and engages with both of them. Thereby, the rotation position of the rotating shaft member 12 with respect to the support member 16 is fixed, and as a result, the rotation position of the brace sheet BS is also fixed.

[0039] The rotation position fixing member 20 has a pair of locking portions 20a inserted into the positioning hole 13c and the positioning groove 17b, a curved portion 20b that curves and extends from the direction in which the locking portion 20a extends, and a gripping portion 20c gripped by an operator. By interposing the curved portion 20b between the locking portion 20a and the gripping portion 20c, the space between the gripping portion 20c and the rotating shaft 15 or the dropout prevention fitting 19 can be widened. Therefore, the operator can easily grip the gripping portion 20c by inserting a finger into the space formed between the gripping portion 20c and the rotating shaft 15.

[0040] <Flow of welding work for the brace sheet BS> 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. FIG. 6 shows the flow of welding work for the brace sheet BS. As shown in FIG. 6, first, the operator supports the brace sheet BS by the rotation jig 10 (step S10). Specifically, first, the rotating shaft 15 of the rotating shaft member 12 in a state where the holding shaft member 11 is not connected is inserted through the portal plates 17 of the left and right support members 16, and the rotating shaft 15 is placed on the V-groove 18a of the V-bearing plate 18. Next, the operator connects the holding shaft member 11 to the rotating shaft member 12 and sandwiches the brace sheet BS with the holding shaft member 11. Thereby, the brace sheet BS is rotatably supported by the rotation jig 10.

[0041] Next, the operator removes the holding shaft member 11 facing the welded portion WP1 from the rotating shaft member 12 (step S11). The operator can remove the holding shaft member 11 from the rotating shaft member 12 by rotating the fastening knob 14. Thereby, it is possible to prevent the holding shaft member 11 from interfering with the welding work for the welded portion WP1.

[0042] Next, the operator rotates the brace sheet BS about the rotation axis 15 (step S12). Specifically, the operator rotates the brace sheet BS by operating the base material plate BS1, the first orthogonal plate BS2, or the second orthogonal plate BS3 so that the welding part WP1 is positioned upward. As a result, the base material plate BS1, the first orthogonal plate BS2, and the second orthogonal plate BS3 are inclined at an angle of 45 degrees with respect to the horizontal plane (see FIG. 3).

[0043] Next, the operator temporarily fixes the angular position of the brace sheet BS by the rotation position fixing member 20 (step S13). Specifically, when the lock portion 20a of the rotation position fixing member 20 is inserted into the positioning hole 13c and the positioning groove 17b, the rotation angle of the rotation shaft member 12 is temporarily fixed with respect to the left and right support members 16.

[0044] Next, the operator performs a welding operation on the welding part WP1 (step S14). Specifically, the operator performs fillet welding on the welding part WP1 along the joint end face BS2a of the first orthogonal plate BS2 to firmly fix the first orthogonal plate BS2 to the base material plate BS1. The welding operation can be performed by the operator, or it may be performed by the welding robot WR.

[0045] FIGS. 7 and 8 show a state in which the welding part WP1 is being welded using the welding robot WR. The welding robot WR performs fillet welding on the welding part WP1 while moving along the joint end face BS2a on the upper surface of the first orthogonal plate BS2. The welding robot WR mainly includes a welding machine body WR1, a welding torch WR2, lower wheels WR3, and side wheels WR4.

[0046] The operator inputs the settings for the welding start point and the welding end point with respect to the welding machine main body WR1. As a result, the welding robot WR can travel along the welding start point to the welding end point, bring the tip of the welding torch WR2 close to the welded part WP1, and perform fillet welding. Here, the base plate BS1, the first orthogonal plate BS2, and the second orthogonal plate BS3 of the brace sheet BS are at an angle inclined 45 degrees with respect to the horizontal plane. Therefore, the welding robot WR can travel stably while bringing the lower wheels WR3 and the side wheels WR4 into contact with the base plate BS1, the first orthogonal plate BS2, or the second orthogonal plate BS3.

[0047] Subsequently, since the welding operation of the welded part WP2 has not been completed (step S15), the operator returns to step S11 to attach and detach the holding shaft member 11. Specifically, the operator attaches the removed holding shaft member 11 to the position facing the welded part WP1, and then removes the holding shaft member 11 facing the welded part WP2 from the rotating shaft member 12.

[0048] Next, the operator rotates the brace sheet BS around the rotation axis 15 (step S12). Specifically, the operator first pulls out and removes the rotation position fixing member 20 from the positioning hole 13c. Next, the operator 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 part WP2 is positioned upward.

[0049] Next, the operator temporarily fixes the angular position of the brace sheet BS with the rotation position fixing member 20 (step S13), and performs a welding operation on the welded part WP2 (step S14). The welding operation can be performed by the operator, but it may also be performed by the above-described welding robot WR.

[0050] Subsequently, since the welding operation of the welded part WP3 has not been completed (step S15), the operator repeats steps S11 to S14 to perform the welding operation of the welded part WP3. Finally, the operator repeats steps S11 to S14 to perform the welding operation of the welded part WP4.

[0051] By the above, it is possible to perform fillet welding on the welded joints WP1, WP2, WP3, and WP4, and the welding operation of the brace sheet BS is completed. As a result, the brace sheet BS can be rotated without using a hoisting machine, and it is possible to shorten the working time and reduce the working burden.

[0052] As described above, the rotary jig 10 according to an embodiment of the present invention has been described. However, the above-described embodiment is merely an example for facilitating the understanding of the present invention and does not limit the present invention. In the above-described embodiment, the rotary jig 10 has been described as being used for rotating the brace sheet BS which is a reinforcing member. However, it is not limited thereto. The rotary jig 10 of the present invention can be used for rotating an intersection construction plate that can be held by four holding shaft members 11 extending in the same direction as the rotary shaft 15.

[0053] Also, in the above-described embodiment, the support member 16 has been described as having the portal plate 17 and the V-shaped bearing plate 18. However, it is not limited thereto. The support member 16 only needs to be able to rotatably support the rotary shaft 15 of the rotary shaft member 12 with respect to the gantry ST, and the rotary shaft 15 may be supported by a rolling bearing fixed to the gantry ST. In this case, the rolling bearing has an inner ring into which the rotary shaft 15 can be inserted. The rolling bearing can employ a ball bearing or a roller bearing. By using the rolling bearing, the rotary jig 10 can rotate more smoothly around the rotary shaft 15.

[0054] Also, in the above-described embodiment, the holding shaft member 11 has been described as being connected to the rotary shaft member 12 by the fastening shaft portion 14b of the fastening knob 14. However, it is not limited thereto. The holding shaft member 11 only needs to be detachably connected to the rotary shaft member 12, and a connection structure including a known fastening member can be adopted.

[0055] Also, in the above-described embodiment, the welding robot WR has been described as performing fillet welding while traveling on the upper surface of the brace sheet BS, but it is not limited to this. A traveling support jig for assisting the traveling 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 traveling support jig. As a result, the welding robot WR can travel more stably, so that the quality of the welding operation can be improved.

[0056] Also, in the above-described embodiment, the welding operation has been described as being performed with the base plate BS1, the first orthogonal plate BS2, and the second orthogonal plate BS3 of the brace sheet BS inclined at 45 degrees with respect to the horizontal plane, but it is not limited to this. As long as the welding robot WR can travel stably along the base plate BS1 and the first orthogonal plate BS2 or the second orthogonal plate BS3, the inclination angle with respect to the horizontal plane may be an angle other than 45 degrees (for example, 20 degrees, or 55 degrees, etc.).

[0057] Also, in the above-described embodiment, the dropout regulation fitting 19 has been described as a curved fitting attached so as to be interposed between a pair of inclined plates 18b, but it is not limited to this. As long as the rotating shaft member 12 can be held in a stable position and the dropout of the rotating shaft member 12 can be prevented, a resin-made dropout regulation band may be attached between a pair of inclined plates 18b.

Explanation of Reference Numerals

[0058] 10 Rotating jig 11 Holding shaft member 11a Holding shaft body 11b Fixing fitting 11c Fixing through hole 12 Rotating shaft member 13 Connecting plate 13a Connector 13b Connecting hole 13c Positioning hole (first engaging portion) 14 Fastening knob (detaching and attaching operating tool) 14a Operated portion 14b Fastening shaft portion 15 Rotating shaft 16 Support member 17 U-shaped plate 17a Rotating shaft hole 17b Positioning groove (second engaging part) 18 V-shaped bearing plate 18a V-shaped groove 18b Inclined plate 19 Detachment regulating fitting (detachment regulator) 20 Rotation position fixing member 20a Locking part 20b Curved part 20c Gripping part 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) ST Stand WP1, WP2, WP3, WP4 Welding part WR Welding robot WR1 Welding machine body WR2 Welding torch WR3 Lower wheel WR4 Side wheel

Claims

1. A rotating jig used to rotatably support an intersecting plate having a base plate, a first orthogonal plate and a second orthogonal plate joined at their end faces to one surface and the other surface of the base plate so as to intersect the base plate, Four holding shaft members disposed on both sides of each of the first orthogonal plate and the second orthogonal plate so as to extend along the end face of the first orthogonal plate and the end face of the second orthogonal plate to hold the intersecting plate, A set of rotating shaft members that connect the four holding shaft members at both ends thereof and have a rotating shaft extending in the same direction as the axial direction of the four holding shaft members, A set of support members disposed on each of a set of gantries to rotatably support the set of rotating shaft members. The rotating jig is characterized by comprising the above.

2. The rotating jig according to claim 1, wherein the rotating shaft member has a connector for detachably connecting the holding shaft member and a detaching and attaching operation tool that is operated when detaching and attaching the holding shaft member.

3. The rotating jig according to claim 1, wherein the holding shaft member has a holding shaft body having a circular cross-sectional shape.

4. The rotating jig according to claim 1, further comprising a rotation position fixing member that engages with a first engaging portion formed on the rotating shaft member and a second engaging portion formed on the support member to fix the rotation position of the rotating shaft member relative to the support member.

5. The rotating jig according to claim 4, wherein the rotation position fixing member fixes the rotation position of the rotating shaft member at an angle at which the base plate has a predetermined inclination angle with respect to the horizontal plane.

6. The center of the rotating shaft is located at the center of the axial centers of the four holding shaft members, The rotating jig according to claim 1, wherein the support member has a V-shaped groove extending in the axial direction of the rotating shaft.

7. A rotating shaft hole through which the rotating shaft is inserted is formed in the support member, The rotating jig according to claim 6, wherein a dropout restricting tool for restricting dropout of the rotating shaft from the rotating shaft hole is provided in the V-shaped groove.

8. The rotating jig according to claim 1, wherein the support member has a rolling bearing having an inner ring into which the rotating shaft can be inserted.

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