Mounting jig

Abstract

To provide a fitting tool which can precisely position a support member onto a lateral surface of a steel pipe column and can easily fix the support member thereto.SOLUTION: A fitting tool 10 includes a pair of longitudinal members 11A, 11A having engaging claws 13A, 13A which are engaged with an upper end face 2a of a lower steel pipe column 1A, and a lateral member 12A which connects the pair of longitudinal members 11A, 11A so that the pair of longitudinal members 11A, 11A are opposed to each other in a horizontal direction while engaging the engaging claw 13A with the upper end face 2a. The pair of longitudinal members 11A, 11A are connected with the lateral member 12A on such a position that opposite surfaces 11f, 11f on which the pair of longitudinal members 11A, 11A are opposed to each other get to a first standard face S1 for a positioning in the horizontal direction of a support member PA, and an upper surface 12f of the lateral member 12A gets to a second standard face S2 for positioning in a perpendicular direction of the support member PA.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a mounting jig, and more particularly to a mounting jig for fastening a support member for mounting other members, etc., to the side surface of a polygonal steel pipe column used in buildings, etc. [Background technology]

[0002] Conventionally, when a support member for attaching other members is fixed to the side of a steel pipe column, for example, Patent Document 1 shows that gusset plates to which braces are bolted are welded to the upper and lower positions of the additional column on the opposing side of the outer column, which is a polygonal steel pipe column. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-158983 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when welding a support member such as the gusset plate described in Patent Document 1 to a steel pipe pole, it is necessary to accurately position the support member at the joining location of the steel pipe pole and weld it in. For this reason, it is necessary to specify the placement location of the support member on the side surface of the polygonal steel pipe pole using, for example, a marker or a marking line, but it is difficult to specify the placement location accurately in a short time.

[0005] In consideration of these points, the present invention provides an attachment jig that can easily and accurately attach a support member to the side of a polygonal steel pipe column having an upper end surface when fixing the support member to the steel pipe column. [Means for solving the problem]

[0006] In order to solve the above problem, the mounting jig of the present invention is an mounting jig for fixing a support member to a polygonal steel pipe column having an upper end surface, wherein at least one of the multiple side surfaces of the steel pipe column is a fixing surface to which the support member is fixed, and the mounting jig comprises a pair of vertical members having engaging claws that engage with the upper end surfaces, and a horizontal member that connects the pair of vertical members so that the pair of vertical members face each other horizontally with the engaging claws of the pair of vertical members engaged with the upper end surfaces, and wherein the pair of vertical members are connected to the horizontal member at a position where the opposing opposing surfaces of the pair of vertical members become a first reference surface for horizontal positioning of the support member, and the upper surface of the horizontal member becomes a second reference surface for vertical positioning of the support member.

[0007] According to the present invention, the mounting jig can be mounted on a steel pipe column by engaging the engaging claws of a pair of vertical members with the upper end surfaces of the steel pipe column and connecting a horizontal member to the pair of vertical members so that the pair of vertical members face each other horizontally. In this mounted state, the lower surface of the support member is brought into contact with the upper surface of the horizontal member, which serves as a second reference surface for vertical positioning, and the side surfaces of the support member are brought into contact with the opposing surfaces of the pair of vertical members, which serve as first reference surfaces for horizontal positioning. This allows the support member to be aligned to a predetermined position on the fastening surface, thereby enabling the support member to be fastened to the predetermined position with high precision.

[0008] A more preferred embodiment comprises a back member arranged on the back surface formed on the opposite side of the fixing surface among the multiple sides of the steel pipe column, and a pair of connecting members arranged on either side of the steel pipe column to connect the cross member to the back member, wherein the pair of connecting members connect the cross member to the back member so that the steel pipe column is sandwiched between the cross member and the back member.

[0009] According to this aspect, the horizontal member arranged on the fastening surface and the back member arranged on the back surface of the steel pipe pole can be connected by a pair of connecting members, and the steel pipe pole can be sandwiched between the horizontal member and the back member. As a result, the mounting jig can be stably mounted to the steel pipe pole, and the positions of the first reference plane and the second reference plane can be stably fixed, thereby improving the positional accuracy of the support member on the steel pipe pole.

[0010] In another more preferred embodiment, among the multiple side surfaces of the steel pipe column, the fixing surfaces to which the support members are fixed are a pair of fixing surfaces located opposite each other, and the mounting jig comprises a pair of vertical members arranged on each of the fixing surfaces, a horizontal member connecting the pair of vertical members on each of the fixing surfaces, and a pair of connecting members arranged on either side of the steel pipe column and connecting the horizontal member arranged on one of the pair of fixing surfaces to the horizontal member arranged on the other fixing surface, and the pair of connecting members connect the horizontal members so that the steel pipe column is sandwiched between the horizontal members.

[0011] According to this aspect, the horizontal member can be connected to the pair of vertical members with the engaging claws of the pair of vertical members engaged with the upper end surfaces of the steel pipe column on one fastening surface and the other fastening surface. Furthermore, the horizontal members arranged on each fastening surface can be connected to each other with a pair of connecting members, and the steel pipe column can be sandwiched between the horizontal members. As a result, the mounting jig can be stably mounted to the steel pipe column, and the positions of the first and second reference surfaces can be accurately determined on each fastening surface, thereby improving the positional accuracy of the support member on the steel pipe column.

[0012] In another preferred embodiment, the mounting jig further includes an upper member connecting the upper portions of the pair of vertical members. According to this embodiment, the upper portions of the pair of vertical members are connected by the upper member, and the pair of vertical members are connected by the horizontal member below the upper portion. This allows the horizontal spacing between the pair of vertical members to be stably fixed. This improves the positional accuracy of the first and second reference surfaces, thereby improving the mounting accuracy of the support member.

[0013] In another preferred embodiment, the mounting jig further includes a clamping member that clamps the support member together with the vertical member before fastening. According to this embodiment, the support member is positioned by being clamped together with the vertical member by the clamping member, which improves the workability of the fastening work by welding the support member to the steel pipe column after positioning, shortens the work time, and improves the positioning accuracy of the support member after fastening.

[0014] In another preferred embodiment, each of the vertical members has a plurality of spacers detachably attached to it, the spacers contacting the surface of the steel pipe pole so as to form a gap with the surface of the steel pipe pole. According to this embodiment, when a protrusion is present on the fastening surface of the steel pipe pole, each of the vertical members can be positioned away from the surface of the steel pipe pole to avoid the protrusion, and the support member can be fastened to the predetermined position of the steel pipe pole with high precision.

[0015] In another preferred embodiment, the spacer has an adjustment mechanism for adjusting the length from each of the vertical members to the surface of the steel pipe pole. According to this embodiment, when a protrusion is present on the fastening surface of the steel pipe pole, the pair of vertical members can be positioned away from the surface of the steel pipe pole in accordance with the height of the protrusion to avoid the protrusion, and the support member can be fastened to a predetermined position of the steel pipe pole with high precision.

[0016] In another preferred embodiment, the engaging claws have an adjustment mechanism for adjusting the length of extension from each vertical member toward the upper end surface. According to this embodiment, when a protrusion is present on the fastening surface of the steel pipe pole, the engaging claws can be extended or retracted to match the height of the protrusion. As a result, each vertical member can be stably suspended while avoiding the protrusion, and the support member can be fastened to the steel pipe pole at a predetermined position with high precision.

[0017] In a further preferred embodiment, the mounting jig is a mounting jig for a support member that supports a welding robot and a running rail on which the welding robot runs as the support member, and the welding robot, while running on the running rail, uses the steel pipe column as the lower steel pipe column and supplies molten welding material to the groove between the lower steel pipe column and the upper steel pipe column, thereby welding the upper steel pipe column and the lower steel pipe column.

[0018] In this aspect, the support member attached by the attachment jig supports the welding robot and the rail on which the welding robot travels, so improving the attachment accuracy of the support member allows the rail on which the welding robot travels to be attached with high precision. As a result, the welding robot can travel stably on the rail, and the welding between the lower steel pipe column and the upper steel pipe column can be performed with high precision and stability. [Effects of the Invention]

[0019] According to the present invention, when a support member is fixed to a steel pipe column having an upper end surface, the support member can be fixed to the side surface of the steel pipe column while being positioned with high precision. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a front view of a main portion of an embodiment of a mounting jig according to the present invention attached to a steel pipe column. [Figure 2] FIG. 2 is a right side view of the main part of the steel pipe pole and the mounting jig shown in FIG. 1. [Figure 3] FIG. 2 is a cross-sectional view taken along line AA of the main part of the steel pipe pole and the mounting jig shown in FIG. 1. [Figure 4] 2 is an enlarged front view of a main part showing details of a lower part of the mounting jig shown in FIG. 1. [Figure 5] 5 is a cross-sectional view of the mounting jig taken along line CC of the mounting jig shown in FIG. 4. [Figure 6] FIG. 6 is an exploded perspective view of the mounting jig shown in FIGS. 1 to 5. [Figure 7]7 is a perspective view showing an operation of positioning a support member in the mounting jig in an assembled state from the disassembled state shown in FIG. 6. FIG. [Figure 8] FIG. 8 is a perspective view of a steel pipe pole with support members positioned and fixed to two side surfaces by the mounting jig shown in FIG. 7. [Figure 9] FIG. 10 is a front view of a main part of a clamping member of a first modified example of the mounting jig. [Figure 10] 10(a) is a plan view of the upper member of the mounting jig of Modification 2, and FIG. 10(b) is a front view of the main part of FIG. [Figure 11] 10(a) is a plan view of the main part of a third modified example of the mounting jig, and FIG. 10(b) is a front view of FIG. [Figure 12] FIG. 10 is a front view of a main part of a fourth modified example of the mounting jig. [Figure 13] FIG. 10 is a right side view of the essential parts of another embodiment of the mounting jig according to the present invention mounted on a steel pipe column. [Figure 14] FIG. 14 is an exploded perspective view of the mounting jig shown in FIG. 13. [Figure 15] FIG. 15 is a perspective view of the state in which the mounting jig shown in FIG. 14 is assembled and then mounted on a steel pipe pole. [Figure 16] 15(a) is an exploded perspective view showing details of the engaging claws of the mounting jig and the spacer shown in FIG. 14, (b) is an exploded perspective view of a first modified example of the spacer, and (c) is an exploded perspective view of second and third modified examples of the spacer. [Figure 17] 9 is a schematic perspective view showing a state in which a welding robot and a travel rail on which the welding robot travels are attached to a support member in the state shown in FIG. 8.

[0033] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0021] An embodiment of the mounting jig according to the present invention will be described in detail below with reference to Figures 1 to 13. In the figures, some components are shown schematically, and some components are omitted for ease of understanding.

[0022] 1 to 3, the mounting jig 10 of this embodiment is a mounting jig for fastening support members PA and PB to a steel pipe column 1 having an upper end surface. The steel pipe column 1 has a butt joint 2 between a lower steel pipe column 1A and an upper steel pipe column 1B, with the lower steel pipe column 1A having an upper end surface 2a and the upper steel pipe column 1B having a lower end surface 2b.

[0023] The lower steel pipe column 1A and the upper steel pipe column 1B are rectangular steel pipe columns, but are not limited to this as long as the fixing surfaces for fixing the support members PA and PB are flat. For example, they may be rectangular steel pipe columns with polygonal shapes other than rectangular (specifically, polygonal steel pipes with four or more sides), or may be multi-sided box columns such as four-sided box columns.

[0024] The upper end surface 2a of the lower steel pipe column 1A is a flat surface (horizontal surface) along a roughly horizontal direction, and the lower end surface 2b of the upper steel pipe column 1B is a tapered surface inclined along the horizontal direction, and a welding groove 2c is formed between the upper end surface 2a and the lower end surface 2b. The lower steel pipe column 1A is erected vertically from a concrete foundation 1C, and the lower steel pipe column 1A is fixed to the upper steel pipe column 1B by a temporary fixing jig 5. After the lower steel pipe column 1A and the upper steel pipe column 1B are welded together along the groove 2c, the temporary fixing jig 5 is removed from the steel pipe column 1.

[0025] As an example, the lower steel pipe column 1A has four side surfaces in the vertical direction, as shown in Fig. 8 described later. The four side surfaces are a front surface 3A, both side surfaces 3B and 3C adjacent to the front surface 3A, and a back surface 3D adjacent to both side surfaces 3B and 3C and parallel to the front surface 3A. The steel pipe column 1 has a rectangular cross section in which the front surface 3A, both side surfaces 3B and 3C, and the back surface 3D are continuous via a curved surface 3E.

[0026] In this embodiment, at least one of the four side surfaces of the lower steel pipe column 1A is a fixing surface to which the support members PA and PB are fixed, and in this embodiment, two side surfaces, the front surface 3A and the back surface 3D, are fixing surfaces. Therefore, in this embodiment, of the four side surfaces of the lower steel pipe column 1A, the fixing surfaces to which the support members PA and PB are fixed are a pair of fixing surfaces located opposite each other. Note that the support member PA is a member fixed to the front surface 3A, and the support member PB is a member fixed to the back surface 3D.

[0027] A plurality of (four in this case) protrusions (also called erection pieces) 4 are welded to predetermined positions on the flat portions of the outer peripheral surfaces of the lower steel pipe column 1A and the upper steel pipe column 1B, i.e., the front surface 3A, both side surfaces 3B, 3C, and the back surface 3D. These protrusions 4 are provided to temporarily fix the lower steel pipe column 1A and the upper steel pipe column 1B to each other. Temporary fixing jigs 5 are attached to the two protrusions 4, 4 arranged above and below.

[0028] The temporary fixing jig 5 extends in the vertical direction, and its upper end is fastened to the protrusion 4 using bolts 6 or the like, and its lower end is fastened to the protrusion 4 using bolts 6 or the like. Although detailed description of the temporary fixing jig 5 is omitted here, it may be configured so that the distance between the two protrusions 4 arranged above and below can be adjusted. This makes it possible to adjust the gap between the lower steel pipe column 1A and the upper steel pipe column 1B arranged above and below, and to adjust the inclination of the upper steel pipe column 1B arranged above. Note that the temporary fixing jig 5 is removed from the protrusion 4 when welding of the butt joint 2 between the lower steel pipe column 1A and the upper steel pipe column 1B is completed, or even if welding of the butt joint 2 is in progress, when the joint strength between the lower steel pipe column 1A and the upper steel pipe column 1B becomes strong enough to support the building under construction.

[0029] The mounting jig 10 of this embodiment is a jig for mounting a total of four support members P, two on each of the front surface 3A and the back surface 3D, and these support members PA, PB are fixed to the outer peripheral surface of the steel pipe column 1 in order to connect other members (not shown). For example, the support members PA, PB are members that support a structure (not shown) including rails that enable a welding robot (not shown) to move when welding the lower steel pipe column 1A and the upper steel pipe column 1B on site.

[0030] As shown in Fig. 1, the mounting jig 10 has, on its front surface 3A, a pair of vertical members 11A, 11A extending vertically, and a horizontal member 12A extending horizontally and connected to the pair of vertical members 11A, 11A. Each vertical member 11A has, at its upper end, an engaging claw 13A that engages with the upper end surface 2a of the butt portion 2 of the steel pipe column 1.

[0031] In this embodiment, as shown in Fig. 6 described later, each vertical member 11A is a member in which a rectangular plate (steel plate) 11b having a through hole for passing a bolt is joined to the upper end of an angle member 11a having an L-shaped cross section. Of the plate 11b, an engagement claw 13A is a portion that protrudes from the angle member 11a toward the steel pipe column 1. In addition, a square plate 13G having a through hole for passing a bolt is joined to the lower end of the angle member 11a.

[0032] The horizontal member 12A is connected to the pair of vertical members 11A, 11A along the front surface 3A (fixing surface) so that the pair of vertical members 11A, 11A face each other horizontally, with the engaging claws 13A, 13A of the pair of vertical members 11A, 11A engaged with the upper end surface 2a of the lower steel pipe column 1A. In this embodiment, each vertical member 11A is connected to the horizontal member 12A at a position that is the same distance downward in the vertical direction from the upper end surface 2a formed on a horizontal plane, so that the upper surface of the horizontal member 12A is a horizontal plane.

[0033] More specifically, as shown in Figure 7, the pair of vertical members 11A, 11A are connected to the horizontal member 12A at a position where the opposing surfaces 11f, 11f of the pair of vertical members 11A, 11A serve as a first reference surface S1 for horizontal positioning of the support members PA, PA, and the upper surface of the horizontal member 12A serves as a second reference surface S2 for vertical positioning of the support members.

[0034] 6 and 7, in this embodiment, a pair of vertical members 11A, 11A are arranged side by side with a predetermined distance D between them and connected with bolts and nuts so as to stand upright from a horizontal member 12A. This predetermined distance D is set so that the vertical members 11A face each other on the front surface 3A of the lower steel pipe column 1A. In this way, the engaging claws 13A of each vertical member 11A do not face the curved surface 3E of the lower steel pipe column 1A but face the front surface 3A, which is a flat surface, and therefore, engagement of the engaging claws 13A with the upper end surface 2a is stable.

[0035] The mounting jig 10 includes an upper member 14A that connects the upper portions of the pair of vertical members 11A, 11A. In this embodiment, the upper member 14A is connected at both ends to the plates 11b of each vertical member 11A. The upper portions of the pair of vertical members 11A, 11A are fixed by the upper member 14A, and below this, the lower portions of the pair of vertical members 11A, 11A are fixed by a horizontal member 12A.

[0036] Therefore, the pair of vertical members 11A, 11A can be stably maintained in a side-by-side arrangement state, and the distance D between the pair of vertical members 11A, 11A is stably secured. Furthermore, because the upper portions of the pair of vertical members 11A, 11A are connected by the upper member 14A, the positional relationship between the engaging claws 13A, 13A is fixed. This stabilizes the engagement state between the engaging claws 13A, 13A and the upper end surface 2a of the steel pipe column 1. In this way, the front unit Y1 (see FIG. 7) is formed by the upper member 14A that connects the upper ends of the pair of vertical members 11A, 11A, and the horizontal member 12A that connects their lower ends.

[0037] The lower steel pipe column 1A of this embodiment also includes, on the rear surface 3D side, a pair of vertical members 11B, 11B and a horizontal member 12B connected to the pair of vertical members 11B, 11B. These structures are similar to those on the front surface 3A side. However, in this embodiment, a pair of vertical members 11B, 11B is also provided on the rear surface 3D side to fasten the support members PB, PB. However, for example, if the support members PB, PB are not required, only the horizontal member 12B may be provided on the rear surface 3D side. In this case, the horizontal member 12B corresponds to the "rear surface member" defined in the present invention, and the lower steel pipe column 1A can be sandwiched between the horizontal members 12A, 12B using connecting members 15, 15 described later.

[0038] In this embodiment, the rear unit Y2 (see FIG. 7) is formed by a pair of vertical members 11B, 11B, an upper member 14B connecting the upper ends of the pair of vertical members 11B, 11B, and a horizontal member 12B connecting the lower ends of the pair of vertical members 11B, 11B. Like the front unit Y1, each vertical member 11B has an engaging claw 13B that engages with the upper end surface 2a of the lower steel pipe column 1A.

[0039] On the rear surface 3D, with the engaging claws 13B of the pair of vertical members 11B engaged with the upper end surfaces 2a of the lower steel pipe column 1A, the pair of vertical members 11B extend in the vertical direction, and the horizontal member 12A extends in the horizontal direction. More specifically, on the rear surface 3D as well, the pair of vertical members 11B are connected to the horizontal member 12B at a position where the opposing surfaces 11f of the pair of vertical members 11B serve as first reference surfaces S1 for horizontal positioning of each support member PB, and the upper surface 12f of the horizontal member 12B serves as second reference surfaces S2 for vertical positioning of each support member PB.

[0040] Both end portions of the horizontal member 12A on the front surface 3A side, which is one fastening surface, and the horizontal member 12B on the back surface 3D side, which is the other fastening surface, are connected to a pair of connecting members 15, 15. Specifically, the pair of connecting members 15, 15 are arranged at positions sandwiching the lower steel pipe column 1A. More specifically, the pair of connecting members 15, 15 connect the pair of horizontal members 12A, 12B so that the steel pipe column 1 is sandwiched between the horizontal members 12A, 12B. In this embodiment, the pair of horizontal members 12A, 12B face the front surface 3A and the back surface 3D in a horizontal state, and the pair of connecting members 15, 15 face both side surfaces 3B, 3C in a horizontal state. The pair of horizontal members 12A, 12B and the pair of connecting members 15, 15 surround the lower steel pipe column 1A.

[0041] Here, the pair of vertical members 11A, 11A (11B, 11B), the pair of horizontal members 12A, 12B, and the pair of connecting members 15, 15 all include metal angle members. The pair of horizontal members 12A, 12B are arranged so that their upper portions form flat upper surfaces 12f (see FIG. 7), and the pair of connecting members 15, 15 are arranged so that their lower surfaces 15f (see FIG. 7) are flat. Each horizontal member 12A (12B) and each connecting member 15 are connected with bolts and nuts with their upper surfaces 12f and lower surfaces 15f abutting against each other. Furthermore, the pair of vertical members 11A, 11A (11B, 11B) are arranged so that flat opposing surfaces 11f, 11f are formed.

[0042] The mounting jig 10 configured in this manner is used to position the four support members PA, PB when they are fixed by welding or the like to the outer peripheral surface of the steel pipe column 1. In this embodiment, the opposing surfaces 11f, 11f of the pair of vertical members 11A, 11A (11B, 11B) serve as a first reference surface S1 for horizontally positioning the support members PA, PB. The upper surface 12f of the horizontal member 12A (12B) serves as a second reference surface S2 for vertically positioning the support members PA (PB).

[0043] Therefore, by abutting the first reference surface S1 and the second reference surface S2 against the support members PA and PB, respectively, the support members PA and PB can be positioned in the vertical and horizontal directions relative to the lower steel pipe column 1A.

[0044] Here, the mounting jig 10 further includes clamping members 16 that clamp the support member P together with each vertical member 11A (11B) before fastening. In this embodiment, four clamping members 16 are provided to accommodate the four support members PA and PB. As shown in FIG. 5 , each clamping member 16 has a slide groove 16b that accommodates a portion of each horizontal member 12A (12B) and allows the clamping member 16 to move along the horizontal member 12A (12B). A threaded hole is formed in each clamping member 16, penetrating to the groove 16b. A fixing bolt 16a can be screwed into the threaded hole and tightened to fix the clamping member 16 to the horizontal members 12A and 12B. In this manner, the support members PA and PB, which are positioned by the first reference surface S1 and the second reference surface S2, can be pressed against the first reference surface S1 by the clamping members 16 to fix the support member P, thereby clamping the support member P.

[0045] The positioning and fastening operations of the support members PA and PB to the side surfaces of the steel pipe column 1 using the mounting jig 10 of this embodiment configured as described above will be described below. First, the assembly of the mounting jig 10 will be described with reference to Figs. 6 and 7.

[0046] First, a gate-shaped unit is fabricated by connecting and fixing a horizontal member 12A to the lower ends of a pair of vertical members 11A, 11A on the front surface 3A side with bolts and nuts, and the engaging claws 13A, 13A are engaged with the upper end surface 2a of the lower steel pipe column 1A. This allows the vertical members 11A, 11A to be suspended from the upper end surface 2a of the lower steel pipe column 1A in the state of the gate-shaped unit.

[0047] Similarly, a gate-shaped unit is fabricated by connecting and fixing a horizontal member 12B to the lower ends of a pair of vertical members 11B, 11B on the back 3D side with bolts and nuts, and the engaging claws 13A, 13A are engaged with the upper end surface 2a of the lower steel pipe column 1A. This allows the vertical members 11B, 11B to be suspended from the upper end surface 2a of the lower steel pipe column 1A in the state of a gate-shaped unit.

[0048] Although the support member P can be positioned in this state, in order to further enhance stability, in this embodiment, upper members 14A and 14B are used. Specifically, on the front surface 3A side, the upper member 14A is inserted between the temporary fixing jig 5 and the groove 2c (see the upper member 14A in FIG. 2), and the upper member 14A is connected and fixed to the top of the gate-shaped unit (a pair of vertical members 11A and 11A) with bolts and nuts. This produces the front surface unit Y1. Similarly, on the rear surface 3D side, the upper member 14B is inserted between the temporary fixing jig 5 and the groove 2c, and the upper member 14B is connected and fixed to the top of the gate-shaped unit (a pair of vertical members 11B and 11B) with bolts and nuts. This produces the rear surface unit Y2.

[0049] To further enhance stability, in this embodiment, the front unit Y1 and the rear unit Y2 are integrated by connecting the front unit Y1 and the rear unit Y2 with connecting members 15, 15. This allows the pair of connecting members 15, 15 to connect the horizontal members 12A, 12B so that the steel pipe column 1 is sandwiched between the horizontal member 12A of the front unit Y1 and the horizontal member 12B of the rear unit Y2.

[0050] On the front surface 3A side of the lower steel pipe column 1A, the support member PA is placed on the upper surface of the horizontal member 12A of the mounting jig 10 and brought into contact with the second reference surface S2, the support member PA is brought into contact with the first reference surface S1 of the vertical member 11A, and the support member PA is clamped by being pressed toward the first reference surface S1 with the clamping members 16. Similarly, on the rear surface 3D side, the support member PB is placed on the upper surface of the horizontal member 12B and brought into contact with the second reference surface S2, the support member PB is brought into contact with the first reference surface S1 of the vertical member 11B, and the support member PB is clamped by being pressed toward the first reference surface S1 with the clamping members 16. In this way, the positioning of the support members PA and PB can be easily performed on the front surface 3A and rear surface 3D sides of the lower steel pipe column 1A.

[0051] After positioning the four support members PA, PB on the two side surfaces (front surface 3A, back surface 3D) of the lower steel pipe column 1A, the four support members PA, PB are temporarily fixed by spot welding, and after the temporary fixing, the clamping members 16, 16 are removed and the mounting jig 10 is removed to expose the four support members PA, PB. Then, the entire circumference of the contact points of each of the four support members PA, PB with the steel pipe column 1 is permanently welded to secure the four support members PA, PB to the front surface 3A and back surface 3D of the lower steel pipe column 1A (see Figure 8).

[0052] The mounting jig 10 of this embodiment allows the support members P to be easily positioned on the front surface 3A and back surface 3D of the lower steel pipe column 1A, and can be fixed to the predetermined positions with high precision. As shown in Fig. 8, the four fixed support members PA, PB can be fixed accurately at a constant height from the upper end surface 2a of the lower steel pipe column 1A and at a predetermined horizontal interval D. This makes it suitable for installing rails to move a welding robot that welds the butt joint 2.

[0053] [Variation 1] Next, a first modified example of the mounting jig will be described with reference to Fig. 9. Fig. 9 is a front view of the main part of the modified mounting jig. In Fig. 7, the clamping member 16 has a mechanism for fixing the clamping member 16 to the horizontal members 12A, 12A with bolts or the like, but in this embodiment, the clamping member 17 has a mechanism for pressing the support members PA, PA against the pair of vertical members 11A, 11A.

[0054] Specifically, clamping member 17 includes rotating body 17a located in the center, pressing portion 17b that screws into rotating body 17a, and pressing portion 17c that screws into rotating body 17a. Pressing portion 17b and pressing portion 17c are threaded in opposite directions, and rotating body 17a screws into these threads. By rotating rotating body 17a in one direction around the axis of the screw, the tips of pressing portions 17b and 17c can be moved in a direction that widens the gap, and by rotating in the opposite direction, the tips of pressing portions 17b and 17c can be moved in a direction that narrows the gap.

[0055] The pressing portions 17b and 17c of the clamping member 17 are placed between the support members PA, PA, and the rotating body 17a is rotated in one direction around the axis of the screw. This causes the pressing portion 17b to press the right support member PA against the first reference surface S1 of the vertical member 11A, and the pressing portion 17c to press the left support member PA against the first reference surface S1 of the vertical member 11A, allowing the two support members PA, PA to be clamped simultaneously. After positioning the support members PA, PA in this way, they are temporarily fixed by spot welding or the like, and then the rotating body 17a is rotated in the direction opposite to the direction of pressing. This allows the clamping of the two support members PA, PA by the clamping member 17 to be released simultaneously.

[0056] [Variation 2] Furthermore, a second modification of the mounting jig will be described with reference to Fig. 10. Fig. 10(a) is a plan view of the upper member of the second modification of the mounting jig, and Fig. 10(b) is a front view of the main part of Fig. 10(a). The mounting jig 10 shown in Fig. 10 has a different pair of vertical members, and the other components are given the same reference numerals and detailed description thereof will be omitted.

[0057] 10, each vertical member 11A of the mounting jig 10 is composed of a lower angle member 21a, an upper angle member 21b, and an adjusting screw member 21c that connects the lower angle member 21a and the upper angle member 21b. The adjusting screw member 21c is inserted into through holes (not shown) formed in the upper end of the lower angle member 21a and the lower end of the upper angle member 21b, and is connected by nuts 21d and 21e that are threaded onto the adjusting screw member 21c so as to sandwich the through holes.

[0058] In this embodiment, the upper angle member 21b and the lower angle member 21a are supported by support nuts 21d. The distance between the upper angle member 21b and the lower angle member 21a can be adjusted by rotating the nuts 21d relative to the adjustment screw members 21c. Furthermore, the adjustment screw members 21c can be fixed to the lower angle member 21a and the upper angle member 21b by tightening the fixing nuts 21e, 21e relative to the adjustment screw members 21c between the upper angle member 21b and the lower angle member 21a. In this way, by adjusting the distance between the upper angle member 21b and the lower angle member 21a, the vertical length of the pair of vertical members 11A, 11A can be adjusted, and the height from the upper end surface 2a of the lower steel pipe column 1A engaged by the engaging claws 13A, 13A to the horizontal member 12A can be adjusted. This allows the height of the second reference plane S2 of the support members PA, PA to be adjusted.

[0059] Furthermore, in this embodiment, the upper member 14A has a through hole formed in the longitudinal direction as an elongated adjustment hole 14c for connecting the pair of vertical members 11A, 11A. In this case, the through hole of the horizontal member 12A is also an elongated adjustment hole (not shown). In this way, since the through hole of the upper member 14C is an elongated hole 14c, it is possible to adjust the distance D between the pair of vertical members 11A, 11A, and therefore the distance between the fixing positions of the support members PA, PA.

[0060] [Variation 3] Furthermore, modified example 3 of the mounting jig will be described with reference to Fig. 11. Fig. 11(a) is a plan view of the main parts of modified example 3 of the mounting jig, and Fig. 11(b) is a front view of Fig. 11(a). In this modified example 3, the through holes of the pair of horizontal members 12A, 12B and the pair of connecting members 15, 15 are elongated holes. Therefore, the spacing between the pair of horizontal members 12A, 12B and the spacing between the pair of connecting members 15, 15 can be freely set to match the size and shape of the lower steel pipe column 1A.

[0061] The clamping members that clamp each support member PA are magnet fixtures 18. The magnet fixtures 18 are switchable magnet fixtures that can switch between magnetizing and demagnetizing the attraction surface. By attaching the magnet fixtures 18 to the side surfaces of the lower steel pipe column 1A, the support members PA and PB are pressed against and clamped against the first reference surfaces S1 and S1, making it easy to position the support members PA and PB, and after the support members PA and PB are attached, the magnet fixtures 18 can be easily removed.

[0062] [Variation 4] Furthermore, another modified example of the mounting jig will be described with reference to Fig. 12. Fig. 12 is a front view of the main part of modified example 4. In the embodiments and modified examples described above, each connecting member 15 is connected to a horizontal member, but for example, as shown in Fig. 12, each connecting member 15 may be connected to a vertical member 11A.

[0063] Furthermore, in the above-described embodiments and modifications, the horizontal members 12A and 12B are fixed to the lower ends of the pair of vertical members 11A. However, as in Modification 4, the horizontal member 12C may be connected to the pair of vertical members 11A so as to be movable in the vertical direction. Specifically, the horizontal member 12C may abut against the opposing surfaces 11f of the pair of vertical members 11A and be attached to each vertical member 11A with fastening members such as bolts and nuts via elongated holes (not shown) formed in each vertical member 11A along the vertical direction. This allows the horizontal member 12C to be connected to the pair of vertical members 11A after adjusting its position in the vertical direction relative to the pair of vertical members 11A. This allows the vertical position of the second reference plane S2 to be set to a desired position.

[0064] Next, another embodiment of the mounting jig of the present invention will be described with reference to the drawings. Fig. 13 is a right side view of a main part of a mounting jig 10A according to another embodiment mounted on a steel pipe pole. Fig. 14 is a perspective view of the mounting jig shown in Fig. 13 in an exploded state. Fig. 15 is a perspective view of the mounting jig shown in Fig. 14 assembled and mounted on a steel pipe pole. Fig. 16(a) is an exploded perspective view showing details of the engaging claws of the mounting jig and the spacer shown in Fig. 14. Fig. 16(b) is an exploded perspective view of a first modified spacer. Fig. 16(c) is an exploded perspective view of second and third modified spacers. In the mounting jig 10A of this embodiment, when a protrusion, such as a support bracket for supporting a footrest on which a worker can place his / her foot during construction, is present on the surface (fixing surface) of the steel pipe pole 1, a pair of vertical members form a space between the steel pipe pole 1 to avoid the protrusion.

[0065] That is, compared to the above-described mounting jig 10, the mounting jig 10A of this embodiment is installed in a state in which the pair of vertical members 11A, 11B are spaced apart from the fastening surfaces 3A, 3D of the steel pipe column 1. Specifically, in Fig. 13, the engaging claws 13C, 13D of each vertical member 11A, 11B are engaged with the upper end surface 2a of the steel pipe column 1, and in a state in which each vertical member is suspended from the upper end surface 2a, the engaging claws 13C, 13D are installed in a state in which they are spaced apart from the fastening surfaces 3A, 3D with a gap S therebetween. Therefore, the engaging claws 13C, 13D are longer than the engaging claws 13A, 13B of the mounting jig 10.

[0066] The engaging claws 13C, 13D may have an adjustment mechanism for adjusting the length of extension from each vertical member 11A, 11B toward the upper end surface 2a of the lower steel column 1A. Specifically, as shown in FIG. 16(a), the engaging claw 13D is located above a plate 11b fixed to the upper end of the vertical member 11B, and a long hole is formed in the engaging claw 13D, and the engaging claw 13D is fastened with a bolt nut. Therefore, the engaging claw 13D can be extended along the long hole by loosening the bolt nut. Also, as in FIG. 7, a pair of connecting members 15, 15 may be provided, but the pair of horizontal members 12A, 12B are formed shorter than those shown in FIG. 7, and the pair of connecting members 15, 15 connecting the horizontal member 12A and the back member 12B is omitted.

[0067] A plurality of spacers 25, which come into contact with the surface of the steel pipe column 1, are detachably attached to each of the vertical members 11A and 11B of the mounting jig 10A so as to form a gap S with respect to the surface of the steel pipe column 1. Although six spacers 25 are used in FIG. 14 and other figures, more or less spacers may be used. For example, a total of three spacers may be provided, with one spacer provided above each vertical member 11A and one spacer provided in the center of the horizontal member 12A. The plurality of spacers 25 allows each of the vertical members 11A and 11B to face each other in parallel with the surface (fixing surface) of the steel pipe column 1, forming a gap S. In this example, a large number of through-holes for attaching the spacers 25 are provided, and the spacers 25 can be attached using any of the through-holes, thereby efficiently avoiding metal fittings and the like that have been fixed to the steel pipe column 1 in advance.

[0068] The spacer 25 has an adjustment mechanism for adjusting the length from each of the vertical members 11A, 11B to the surface of the steel pipe column 1. More specifically, as shown in detail in FIG. 16(a), the spacer 25 is composed of a bolt 25a and a nut 25b, and is formed by inserting the bolt 25a while threading it into a female thread formed in a through-hole of the vertical member 11B, and then tightening the nut 25b. The size of the gap S is determined by the tightening length of the bolt 25a. Therefore, when the amount of protrusion from the surface of the protrusion fixed to the surface of the steel pipe column 1 is large, the tightening amount of the bolt 25a is reduced, and the spacer 25 is fixed with the nut 25b.

[0069] The spacer 26 of the first modified example shown in Figure 16(b) is composed of a bolt 26a, a nut 26b, and a spacer piece 26c made by bending a metal plate into a square shape, and the bolt 26a is passed through a through-hole formed in the overlapping part of the spacer piece 26c, and the spacer piece 26c is fixed to the vertical member 11B with the nut 26b. When a wide gap S is required, the spacer piece 26c is made large to widely separate the vertical member 11B and the fixing surface of the steel pipe column 1, thereby widening the gap S. Note that the spacer piece does not have to be square in side view as described above, but may be triangular.

[0070] A spacer 27 of a second modified example shown in FIG. 16(c) is composed of a bolt 27a and a block 27b made of metal, resin, or the like. The bolt 27a is inserted into a through-hole in the vertical member 11B and screwed into the block 27b to secure the vertical member 11B. A female thread may be formed in the block 27b in advance. A spacer 28 of a third modified example is composed of a cubic block 28a made of metal, wood, resin, or the like, and a cylindrical permanent magnet 28b located in the center of the block. The spacer 28 is fixed by magnetic attraction to the surface of the vertical member 11B made of steel or the like. The spacer 28 does not require through-holes in the vertical members 11A and 11B, and can be attached to any position.

[0071] When the spacers 25 to 28 configured as described above are attached to each of the vertical members 11A, 11B and the mounting jig 10A is attached to the steel pipe column 1, a gap S is formed between the fastening surfaces 3A, 3B of the steel pipe column 1 and each of the vertical members, and each of the vertical members 11A, 11B is installed in a state where it is spaced apart from the surface of the steel pipe column 1. Therefore, as shown in FIG. 15 , even if there are metal fittings fixed to the surface of the steel pipe column 1 by welding or the like, the mounting jig 10A can be mounted at a predetermined position while avoiding these. As a result, the support members PA, PB can be fixed to the steel pipe column 1 with high precision using the mounting jig 10A, and the welding between the lower steel pipe column 1A and the upper steel pipe column 1B can be performed with high precision and stability.

[0072] In addition, in this embodiment, the horizontal members 12A and 12B that connect the lower parts of the pair of vertical members 11A and 11B (back members) are formed short, and there are no pair of connecting members 15 that connect the horizontal members 12A and 12B, so the configuration can be simplified and made smaller, which simplifies transportation and assembly work.

[0073] 17, such mounting jigs 10, 10A are mounting jigs for support members PA, PB that support a welding robot 80 and a traveling rail 73 on which the welding robot 80 travels. The welding robot 80 welds the lower steel pipe column 1A and the upper steel pipe column 1B together by supplying molten welding material to a groove 2c between the lower steel pipe column 1A and the upper steel pipe column 1B while traveling on the traveling rail 73.

[0074] Here, the pair of rails 73 are attached to the lower steel pipe column 1A so as to sandwich the lower steel pipe column 1A. In this embodiment, each support member 71A (71B) is fixed to the support pieces PA, PA (PB, PB) on the lower steel pipe column 1A so as to be sandwiched between the pair of first support beams 71A, 71B. In this embodiment, the first support beams 71A, 71B are long members such as H-shaped steel, and extend in a direction perpendicular to the rails 73 on which a later-described articulated robot (robot arm) 80 travels.

[0075] Next, a pair of second support beams 72, 72 are fixed across the pair of first support members 71A, 71B so as to sandwich the lower steel pipe column 1A. The second support beams 72 are long members, and a rail 73 is attached to each second support beam 72 along the longitudinal direction. Therefore, the pair of rails 73, 73 can be attached to the lower steel pipe column 1A so as to sandwich the lower steel pipe column 1A. Note that in this embodiment, the rails 73 are attached to the lower steel pipe column 1A using the first support beams 71A, 71B and the second support members 72, 72, but the rails 73 may also be attached to the lower steel pipe column 1A as long as rigidity can be ensured, for example.

[0076] In this embodiment, rail 73 is a linear guide rail, and a carriage (slider) 74 is attached to rail 73. Carriage 74 is movable along rail 73 by a motor (not shown). Note that in this embodiment, travel control of carriage 74, drive control of welding robot 80 (described later), welding according to welding conditions using torch 92 attached to the tip of welding robot 80, etc. are performed by a control device (not shown), but for example, at least some of these operations may be performed by an operator.

[0077] The welding robot 80 used in this embodiment is attached to the carriage 74. The welding robot 80 used in this embodiment is a robot that rotates on six axes and is an articulated robot connected to a welding machine. Note that the form of the welding robot is not particularly limited, and as long as the welding robot can move the position of the tip of the torch of the welding machine to an appropriate position, the welding robot may be, for example, a welding robot that travels on rails or a welding robot that only turns.

[0078] Welding robot 80 is a welding robot connected to a welding machine (not shown), and includes a base 82 attached to carriage 74, and a swivel base 83 placed on base 82 and swivelable relative to base 82. A lower arm 84 is pivotally attached to swivel base 83. A joint 85 is pivotally attached to the tip of lower arm 84. An upper arm 86 is attached to joint 85 so as to be rotatable around an axis extending in the longitudinal direction.

[0079] Furthermore, a support arm 87 that supports a torch 92 of a welding machine, which serves as an end effector, is attached to the tip of upper arm 86. A cable 91 that feeds welding wire is connected to torch 92 of support arm 87 relative to upper arm 86, and the base end of cable 91 is connected to a feeder (not shown) that feeds the welding wire.

[0080] The support members PA, PB attached by the attachment jig 10 support the welding robot 80 and the traveling rail 73 on which the welding robot 80 travels, and therefore, by improving the attachment accuracy of the support members PA, PB, the rail 73 on which the welding robot 80 travels can be attached with high precision. As a result, the welding robot 80 can be made to travel stably on the rail 73, and welding between the lower steel pipe column 1A and the upper steel pipe column 1B can be performed with high precision and in a stable manner.

[0081] Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various design modifications can be made without departing from the spirit of the present invention as set forth in the claims.

[0082] Although an example of a rectangular metal support plate has been shown as the support member, it is not limited to plate material and can be changed as appropriate to a block-shaped member, a shaft-shaped member, a threaded member such as a bolt or nut, etc. Furthermore, as clamping members that clamp a pair of vertical members and a support member, examples of a stopper-shaped clamping member, a clamping member that widens the gap between opposing support members, and an example of a magnetic fixture have been shown, but other shapes may also be used as long as they are fixed to the side of the steel pipe column and clamp the support member to press it against the pair of vertical members.

[0083] Furthermore, in this embodiment, the vertical members and horizontal members, and the horizontal members and connecting members are connected by inserting bolts into the through holes provided in the members and fastening nuts to the bolts, but the connecting means is not particularly limited as long as these connections can be made. For example, they may be connected by inserting pins into the through holes, or they may be connected directly by a clamper or the like. [Explanation of symbols]

[0084] 1: steel pipe column, 1A: lower steel pipe column, 2: butt portion, 2a: upper end surface, 10, 10A: mounting jig, 3A: front surface (fixed surface), 3D: back surface (fixed surface), 11A, 11B: pair of vertical members, 12A: horizontal member, 12B: horizontal member (back member), 13A, 13B, 13C, 13D: engaging claws, 14A, 14B, 14C: upper member, 15: connecting member, 16, 17: clamping member, 18: magnet fixing device (clamping member), 25, 26, 27, 28: spacer, PA, PB: support plate (support member), S1: first reference surface, S2: second reference surface, S: gap

Claims

1. An attachment jig for fixing a support member to a polygonal steel pipe column having an upper end surface, At least one side surface among the plurality of side surfaces of the steel pipe column is a fixing surface to which the support member is fixed, The mounting jig is a pair of vertical members each having an engaging claw that engages with the upper end surface; a horizontal member connecting the pair of vertical members so that the pair of vertical members face each other in a horizontal direction with the engaging claws of the pair of vertical members engaged with the upper end surfaces, An attachment jig characterized in that the pair of vertical members are connected to the horizontal member at a position where the opposing surfaces of the pair of vertical members become a first reference surface for horizontal positioning of the support member, and the upper surface of the horizontal member becomes a second reference surface for vertical positioning of the support member.

2. The mounting jig is A back surface member arranged on a back surface formed on the opposite side of the fixing surface among the plurality of side surfaces of the steel pipe column; A pair of connecting members are arranged at positions sandwiching the steel pipe column and connecting the horizontal member and the back member, The mounting jig according to claim 1, characterized in that the pair of connecting members connect the cross member and the rear member so that the steel pipe column is sandwiched between the cross member and the rear member.

3. Among the multiple side surfaces of the steel pipe column, the fixing surfaces to which the support member is fixed are a pair of fixing surfaces located opposite to each other, The mounting jig is The pair of vertical members are arranged on each of the fastening surfaces; The horizontal member connects the pair of vertical members for each of the fastening surfaces; A pair of connecting members are provided, which are arranged at positions sandwiching the steel pipe column and connect the horizontal member arranged on one of the pair of fixing surfaces to the horizontal member arranged on the other fixing surface, The mounting jig according to claim 1, characterized in that the pair of connecting members connect the horizontal members so that the steel pipe column is sandwiched between the horizontal members.

4. The mounting jig according to any one of claims 1 to 3, further comprising an upper member connecting upper portions of the pair of vertical members.

5. The mounting jig according to any one of claims 1 to 4, further comprising a clamping member that clamps the support member together with the vertical member before being fixed.

6. An installation jig as described in any one of claims 1 to 5, characterized in that each vertical member has a plurality of spacers that contact the surface of the steel pipe column and are removably attached to the vertical member so as to form a gap with the surface of the steel pipe column.

7. The mounting jig according to claim 6, wherein the spacer has an adjustment mechanism for adjusting the length from each of the vertical members to the surface of the steel pipe column.

8. 8. The mounting jig according to claim 6, wherein the engaging claws have an adjustment mechanism for adjusting the length of extension from each of the vertical members toward the upper end surface.

9. the mounting jig is a mounting jig for a support member that supports a welding robot and a traveling rail on which the welding robot travels, as the support member; The welding robot welds the upper steel pipe column and the lower steel pipe column together by traveling on the traveling rail, with the steel pipe column as the lower steel pipe column, and supplying molten welding material to the groove between the lower steel pipe column and the upper steel pipe column.

Images