Positioning fixture and bracket fixing method using the same

Abstract

To provide a positioning fixture capable of easily positioning a bracket on a side surface of a column or a beam of a building.SOLUTION: A positioning fixture 1 comprises: an abutment member 10 that abuts against a surface of a flange of a connection bracket B2; a fixing member 30 attached to the abutment member and fixed with the abutment member in contact with the surface of the flange of the connection bracket; an extension member 20 connected to a side part of the abutment member to extend along a web body over the flange of the connection bracket; and a support leg 30 connected to an extension end of the extension member to support the connection bracket. The abutment member 10 abuts against the surface of the flange of the connection bracket B2 and a surface of a flange of a girder B1. The extension member 20 extends along the web body over the flanges of the girder B1 and the connection bracket B2. The support leg 30 abuts against a side surface of the web body of the girder B1 to support the connection bracket B2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a positioning jig and a bracket fixing method using the positioning jig, and more particularly to a positioning jig used when fixing a bracket to the side of a pillar or beam of a building, and a bracket fixing method using the positioning jig. [Background technology]

[0002] BACKGROUND ART Conventionally, a positioning jig is known which is used when fixing a joint bracket to the side surface of a pillar or girder of a building and determines the position of the joint bracket (see, for example, Patent Document 1). By using such a positioning jig, the position of the joint bracket can be adjusted while aligning the flange surface of the column or girder with the flange surface of the joint bracket, and the joint bracket can be positioned in the desired position. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 6-218582 Summary of the Invention [Problem to be solved by the invention]

[0004] When constructing a steel column by welding a joint bracket to the side of a column, or when constructing an airplane beam (cross beam) by welding a joint bracket to the side of a girder, the joint bracket is heavy and must be lifted to the specified position by a crane. At this time, the position of the joint bracket is adjusted while it is lifted by the crane, and it cannot be removed from the crane until the position of the joint bracket is determined. As a result, the crane must be occupied for a relatively long time. Although the use of a positioning jig such as that described in Patent Document 1 makes it easier to position the joint bracket, the jig is relatively large, and therefore a smaller positioning jig has been desired.

[0005] In particular, there was a need for a system that would allow the position of the joint bracket to be fine-tuned after it had been moved to the designated position by the crane and removed from the crane. This would have eliminated the need to occupy the crane for long periods of time and could have prevented the joint bracket from swinging during lifting, making it difficult to adjust its position.

[0006] An object of the present invention is to provide a positioning jig that is relatively small yet can easily position a bracket on the side of a pillar or beam of a building, and a bracket fixing method using the positioning jig. Another object of the present invention is to provide a positioning jig and a bracket fixing method using the positioning jig that enable adjustment of the position of the bracket while the bracket is removed from the crane. [Means for solving the problem]

[0007] The above-mentioned problem is solved by the positioning jig of the present invention, which is used when fixing a bracket to the side surface of a pillar or beam of a building, and positions the bracket with the flange surface of the bracket aligned with the flange surface of the pillar or beam, and includes a long abutment member that abuts against the flange surface of the bracket, a fixing member attached to the abutment member and fixing the abutment member in a state where the abutment member abuts against the flange surface of the bracket, and a fixing member connected to a side portion of the abutment member in the width direction and extending beyond the flange of the bracket. The problem is solved by the bracket further comprising an extension member extending along the main body of the bracket, and a support member connected to the extension end of the extension member and supporting the bracket, wherein when the bracket is placed on the side of the column or beam, the abutment member abuts against the surface of the flange of the bracket and the surface of the flange of the column or beam, the extension member extends along the main body of the column or beam beyond the flange of the column or beam and the flange of the bracket, and the support member abuts against the side of the main body of the column or beam to support the bracket. With the above configuration, it is possible to realize a positioning jig that is relatively small but can easily position the bracket. More specifically, the positioning jig has a relatively simple configuration including an abutment member, a fixing member, an extension member, and a support member, and can be used by workers as a more compact jig than conventional ones. Furthermore, as described above, when the bracket is placed on the side of a pillar or beam, the bracket can be stably supported because it is provided with a support member that abuts against the side of the main body of the pillar or beam and supports the bracket.

[0008] In this case, the bracket is a joint bracket, the positioning jig is a jig used when fixing the joint bracket to the side of the pillar or beam, and is a jig for positioning the joint bracket, and is provided with a second fixing member attached to the abutment member and fixing the abutment member in a state where the abutment member is abutting against the flange surface of the pillar or beam, the extension members are provided on the left and right side portions of the abutment member and extend in a direction perpendicular to the longitudinal direction of the abutment member, and the support members are support legs that extend from the extending ends of the left and right extension members in a direction perpendicular to the extending direction of the extension members and support the bracket. As described above, by providing left and right support legs, when the bracket is placed on the side surface of a pillar or beam, the bracket can be supported more stably by the left and right leg members.

[0009] In this case, the abutment member abuts against the top surface of the flange of the bracket and the top surface of the flange of the column or beam, the left and right extension members extend from the abutment member along the side surfaces of the web main body portion of the bracket and the side surfaces of the web main body portion of the column or beam, the left and right support legs abut against the side surfaces of the column or beam together with the bracket when the bracket is placed on the side surface of the column or beam, and the positioning jig preferably supports the bracket in a free-standing state on the side surface of the column or beam. With the above configuration, the positioning jig can support the bracket on the side of the column or beam in a free-standing state. This makes it possible to adjust the position of the joint bracket even when it is removed from the crane. For example, fine adjustments of the joint bracket can be made by appropriately tightening or loosening the fixing member and second fixing member.

[0010] In this case, the fixing member is attached integrally to the left and right side portions of the abutment member, and fixes the abutment member by sandwiching the abutment member and the flange of the bracket, and the second fixing member is positioned at a different position from the fixing member in the longitudinal direction of the abutment member, and is attached integrally to the left and right side portions of the abutment member, and fixes the abutment member by sandwiching the abutment member and the flange of the column or beam. As described above, by integrally providing the fixing member and the second fixing member, it is possible to easily fix the fixing member to the pillar or beam, or to the bracket.

[0011] In this case, it is preferable to provide a first moving device that attaches at least one of the left and right fixed members to the abutment member so that it can move in the width direction of the abutment member, and a second moving device that attaches at least one of the left and right second fixed members to the abutment member so that it can move in the width direction of the abutment member. With the above configuration, the fixing member (second fixing member) can be moved to correspond to brackets (joint brackets) of different widths, and the positioning jig can be appropriately fixed to the bracket. Note that there are several types of joint brackets, including 300mm and 400mm widths.

[0012] In this case, the first moving device has a first fixed rail fixed to the abutment member and extending along the width direction of the abutment member, and a first movable rail attached so as to be slidable relative to the first fixed rail, and the fixed member is attached to the first movable rail and slides together with the first movable rail, and the second moving device has a second fixed rail fixed to the abutment member and extending along the width direction of the abutment member, and a second movable rail attached so as to be slidable relative to the second fixed rail, and the second fixed member is attached to the second movable rail and slides together with the second movable rail. With the above configuration, the fixing member and the second fixing member attached to the abutting member can be easily slid and moved, and it can be adapted to various types of joint brackets.

[0013] In this case, it is preferable that a plurality of openings are formed in the abutment member in a portion different from the portion to which the fixed member, the second fixed member, the extension member, the first moving device, and the second moving device are attached, the openings penetrating the abutment member in the thickness direction. The above-described configuration allows the weight of the positioning jig to be further reduced, and also makes it easier to visually check the attachment state of the positioning jig to the flange surfaces of the pillar or beam and the bracket.

[0014] Furthermore, the above-mentioned problem is solved by a bracket fixing method using a positioning jig of the present invention, which includes a jig fixing step of fixing the positioning jig to the top surface of the flange of the bracket, a lifting step of lifting the bracket to which the positioning jig is fixed using a lifting device, a placement step of placing the bracket to which the positioning jig is fixed at a predetermined location on the side of the pillar or beam, a removal step of removing the lifting device from the bracket, and a welding step of welding the bracket to the predetermined location on the side of the pillar or beam, wherein in the jig fixing step, the positioning jig is fixed so that the end face of the bracket and the end face of the support member are aligned, and in the placement step, the support member and the bracket are abutted against the side of the pillar or beam so that the bracket is free-standing on the side of the pillar or beam. The above configuration makes it possible to realize a bracket fixing method using a positioning jig that allows the position of the joint bracket to be adjusted while the joint bracket is removed from the crane. [Effects of the Invention]

[0015] According to the positioning jig and bracket fixing method using the positioning jig of the present invention, it is possible to easily position a bracket on the side of a pillar or beam of a building, even though the positioning jig is relatively small. Furthermore, the position of the bracket can be adjusted with the bracket removed from the crane. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 2 is a perspective view of a positioning jig, a girder, and a joint bracket according to the first embodiment. [Figure 2] FIG. 10 is a view showing the state in which a positioning jig is fixed to the flange of the joint bracket. [Figure 3] This is a diagram showing the state in which a joint bracket with a positioning jig fixed thereto is placed on the side of a main girder. [Figure 4] This is a diagram showing the state in which the joint bracket is fixed to the side of the girder. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] Top view of the positioning jig, girder, and joint bracket [Figure 9] A side view of the positioning jig, girder, and joint bracket. [Figure 10] FIG. 10 is a perspective view of a positioning jig, a girder, and a joint bracket according to a second embodiment. [Figure 11] FIG. 10 is a side view of the positioning jig, girder, and joint bracket of the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. This embodiment relates to a "positioning jig" that is relatively small and yet allows brackets to be easily positioned on the side of a pillar or beam of a building. It also relates to a "bracket fixing method using a positioning jig."

[0018] First Embodiment As shown in Figures 1 to 9, the positioning jig 1 of the first embodiment is used when fixing a joint bracket B2 to the side of a main girder B1 of a building, and is a jig for positioning the joint bracket B2 by aligning the surface of the flange B1b of the main girder B1 with the surface of the flange B2b of the joint bracket B2. Specifically, as shown in Figures 1 to 4, the positioning jig 1 is fixed in advance to the top surface of the flange B2b of the joint bracket B2, and is placed together with the joint bracket B2 on the side of the girder B1, which is laid flat on its side. At this time, the positioning jig 1 is fixed to a predetermined position on the girder B1, abutting against the surface of the flange B1b of the girder B1 and the surface of the flange B2b of the joint bracket B2. The joint bracket B2 can then stand on its own on the side of the girder B1. By being attached in this manner, the positioning jig 1 can determine (fine-tune) the height and width positions of the girder B1 and the joint bracket B2. Below, the main beam B1 and joint bracket B2 will be explained first.

[0019] As shown in Figs. 1, 3 and 4, the girder B1 is a member that constitutes the skeleton of a building, and in this embodiment, is a member to which the joint bracket B2 is welded. The main girder B1 has a long, plate-shaped web main body B1a, a flange B1b joined to one widthwise end (upper end) of the web main body B1a, and a second flange B1c joined to the other widthwise end (lower end) of the web main body B1a. For example, a plane beam, a cross beam, or the like is formed by joining a pair of joint brackets B2 to predetermined locations on both sides of a main beam B1.

[0020] The joint bracket B2 is a member that constitutes the framework of a building as shown in FIGS. 1 to 4, and in this embodiment, is a member that is welded perpendicularly to the side surface of the main girder B1. The joint bracket B2 has a long, plate-shaped web main body portion B2a, a flange B2b joined to one widthwise end (upper end) of the web main body portion B2a, and a second flange B2c joined to the other widthwise end (lower end) of the web main body portion B1a. As shown in FIG. 3, an attachment hole B2d for attaching a hoisting fixture L2 of a hoisting device L is formed at one end (other end) of the web main body B. 4, a notch B2e is formed on one end surface (opposite surface) of the flange B2b so as to fit with the flange B1b of the main girder B1. The formation of the notch B2e allows the joint bracket B2 to be butted against the side surface of the main girder B1.

[0021] As shown in Figure 1, when the joint bracket B2 is set on the side of the main girder B1, the flange B1b of the main girder B1 and the flange B2b of the joint bracket B2 are mated, and the end faces of the web main body portion B2a and second flange B2c of the joint bracket B2 are abutted against the side of the web main body portion B1a of the main girder B1. That is, as shown in Fig. 4, the web main body portion B2a of the joint bracket B2 abuts against the side surface of the web main body portion B1a of the main girder B1 and the back surface (two surfaces) of the flange B1b. Also, the second flange B1c of the joint bracket B2 abuts against the side surface of the web main body portion B1a of the main girder B1 and the back surface (two surfaces) of the second flange B1c. As another embodiment, when welding the joint bracket B2 to the girder B1, the flange B1b and second flange B1c of the girder B1 and the flanges B2b and B2c of the joint bracket B2 may be joined together before they are assembled.

[0022] In the above configuration, as shown in Figures 2 to 4, the joint bracket B2 can be stably supported by using the positioning jig 1 when welding the joint bracket B2 to the side surface of the girder B1. Specifically, the positioning jig 1 can support the joint bracket B2 in a self-standing state on the side surface of the girder B1. This eliminates the need to position the joint bracket B2 while it is lifted by the lifting device L, as was done in the past. In other words, by using the positioning jig 1, the joint bracket B2 can be made to stand on its own even when it is removed from the lifting device L. This eliminates the need to occupy the lifting device L for long periods of time. In particular, as shown in Figure 4, a gap (also called a root gap) for welding must be formed between the flange B1b of the main girder B1 and the flange B2b of the joint bracket B2. Therefore, adjusting the position (tilt adjustment) of the joint bracket B2 is difficult, but by using the positioning jig 1, the position of the joint bracket B2 can be adjusted easily and efficiently. A bracket fixing method using the positioning jig 1 will be described in detail later.

[0023] The joint bracket B2 may be welded to the side surface of the column of the pillar. In other words, the positioning jig 1 may be used when fixing the joint bracket B2 to the side surface of the pillar (column of the pillar). In addition, the positioning jig 1 may be used when fixing a joint bracket B2 to the side of a beam (sub-beam).The positioning jig 1 may be used when fixing a bracket having a flange to the side of a frame member having a flange.

[0024] <<Details of the positioning jig>> As shown in Figures 1 and 5 to 7, the positioning jig 1 comprises a plate-shaped abutment member 10, left and right extension members 20 connected to the widthwise side portions of the abutment member 10, left and right support legs 30 connected to the extended ends of the left and right extension members 20, a plurality of fixing members 40 and second fixing members 50 attached to the abutment member 10, a first moving device 60 and a second moving device 70 attached to the abutment member 10, and a connecting member 80 connecting the first moving device 60 and the second moving device 70. A plurality of openings 85 are formed on the surface of the abutment member 10 in a portion different from the portion where the left and right extension members 20, the fixed member 40, the second fixed member 50, the first moving device 60, and the second moving device 70 are attached, penetrating the thickness direction of the abutment member 10. Furthermore, a plurality of eyebolts 90 for hooking a lifting part L1 (lifting rope) are fixed to the upper part (upper end part) and lower part of the abutting member 10.

[0025] As shown in Figures 1 and 5 to 7, the abutment member 10 corresponds to the main body of the positioning jig 1, and is a rectangular plate-shaped member that is long in the vertical direction and is used to align the joint bracket B2 with the main girder B1. More specifically, the abutment member 10 is a member that determines the fixed position of the joint bracket B2 in the height direction of the girder B1 by abutting against the top surface of the flange B1b of the main girder B1 and the top surface of the flange B2b of the joint bracket B2. As shown in FIGS. 8 and 9, the abutment member 10 is configured to abut flush (approximately flush) with the surfaces of the girder B1 (flange B1b) and the joint bracket B2 (flange B2b).

[0026] As shown in Figures 5 and 6, the abutment member 10 has a long abutment main body portion 11, an upper flange 12 protruding from the upper end of the abutment main body portion 11 toward the front side, left and right side flanges 13 protruding from both left and right end portions of the abutment main body portion 11 toward the rear side, and a lower flange 14 protruding from the lower end of the abutment main body portion 11 toward the front side. An eyebolt 90 is attached to the upper surface of each of the left and right ends of the upper flange 12. Further, an extension member 20 is connected to each of the left and right side flanges 13.

[0027] As shown in Figs. 1 and 5 to 7, the extension members 20 are connected to the left and right side portions of the abutting member 10, and are plate-like members that extend rearward, and are configured to sandwich the joint bracket B2 therebetween. More specifically, the extension member 20 extends in a direction perpendicular to the longitudinal direction of the contact member 10 and extends rearward of the contact member 10 . 1, 8, and 9, when the positioning jig 1 is attached to the girder B1 and the joint bracket B2, the left and right extension members 20 extend along the joint bracket B2 (web main body portion B2a) beyond the flange B1b of the girder B1 and the flange B2b of the joint bracket B2. The extension members 20 also extend along the girder B1 (web main body portion B1a). A support leg 30 is connected to the extending end of the extension member 20 .

[0028] 1 and 5 to 7, the support legs 30 are members that support the joint bracket B2 by contacting the side surfaces of the girder B1 (web main body portion B1a). In other words, they are support members that allow the joint bracket B2 to stand on its own. The left and right support legs 30 extend downward from the extending ends of the left and right extending members 20 in a direction perpendicular to the extending direction of the extending members 20. The support leg 30 has a leg body 31 that extends in the vertical direction and has an L-shaped cross section, and a leg contact portion 32 that is a rectangular plate and is fixed to the lower end of the leg body 31. 1, 8, and 9, when the positioning jig 1 is fixed to the joint bracket B2, the end faces (lower end faces) of the support legs 30 (leg abutment portions 32) correspond to (are flush with) the end faces of the joint bracket B2. This causes the joint bracket B2 and the left and right support legs 30 to abut against the side surfaces of the main girder B1 (web main body portion B1a).

[0029] As shown in FIGS. 1, 6 and 7, the fixing member 40 is attached to the abutting member 10 and fixes the abutting member 10 in a state where the abutting member 10 abuts against the surface of the flange B2b of the joint bracket B2. Specifically, the fixing members 40 are attached integrally to the left and right side portions of the abutting member 10, and fix the abutting member 10 by sandwiching the abutting member 10 and the joint bracket B2 (flange B2b).

[0030] The fixing member 40 is, for example, a fixed clamp with a handle, and is attached so as to pass through the abutment member 10. The fixing member 40 has a clamp main body 41 arranged on the front surface of the abutment member 10, a shaft 42 fixed to the clamp main body 41 and passing through the abutment member 10, a holding part 43 attached to the extending end of the shaft 42 and arranged on the rear surface of the abutment member 10, a pressing part 44 attached to the clamp main body 41 and pressing the abutment member 10, and a handle part 45 for operating the pressing part 44. The fixing member 40 can clamp the abutment member 10 and the joint bracket B2 (flange B2b) by an operator operating the handle portion 45. Specifically, the operation of the handle portion 45 causes the abutment member 10 to press the pressing portion 44, and the abutment member 10 and the joint bracket B2 are clamped by the holding portion 43 and the pressing portion 44.

[0031] The fixing member 40A is attached to one side portion (left side portion) of the abutting member 10. A plurality of fixing members 40A are arranged at intervals in the vertical direction. The fixing member 40B is provided on the other side portion (right side portion) of the abutting member 10, and is attached to the connecting member 80. A plurality of fixing members 40B are arranged at intervals in the vertical direction. The fixed member 40A is fixed to the contact member 10, but the fixed member 40B is movable in the left-right direction relative to the contact member 10 by the first moving device 60.

[0032] As shown in FIGS. 1, 6 and 7, the second fixing member 50 is attached to the abutting member 10 and fixes the abutting member 10 in a state where the abutting member 10 abuts against the surface of the flange B1b of the main girder B1. Specifically, the second fixing members 50 are attached integrally to the left and right side portions of the abutting member 10, and fix the abutting member 10 by sandwiching the abutting member 10 and the main beam B1 (flange B1b). The second fixing member 50 is a fixed clamp with a handle, similar to the fixing member 40, and is attached so as to pass through the contact member 10. The second fixing member 50 has a clamp main body 51, a shaft 52, a holding portion 53, a pressing portion 54, and a handle portion 55.

[0033] The second fixing member 50A is attached to one side portion (left side portion) of the abutting member 10. The second fixing member 50B is provided on the other side portion (right side portion) of the abutting member 10, and is attached to the connecting member 80. The second fixed member 50B is movable in the left-right direction relative to the contact member 10 by a second moving device 70.

[0034] As shown in FIGS. 7 to 9, the fixing member 40 and the second fixing member 50 are arranged side by side in the vertical direction, and are arranged at the same position in the width direction of the positioning jig 1. The fixing member 40 is disposed at a position higher than the second fixing member 50. The fixing member 40 and the second fixing member 50 may be fixing members (clamping members) other than fixing clamps.

[0035] As shown in FIGS. 1 and 5 to 7, the first movement device 60 is a rail device (linear rail device) that is attached to the contact member 10 and that attaches the fixed member 40B to the contact member 10 so that the fixed member 40B can move in the left-right direction. The first moving device 60 has a first fixed rail 61 (linear rail) fixed to the upper part of the abutment member 10 and extending along the width direction (left-right direction) of the abutment member 10, a first movable member 62 (linear guide) attached so as to be able to slide relative to the first fixed rail 61, and a drive motor 63 that operates the first movable member 62.

[0036] The second moving device 70 is attached to the contact member 10 in the same manner as the first moving device 60, and is a rail device that attaches the second fixed member 50B to the contact member 10 so that the second fixed member 50B is movable in the left-right direction. The second moving device 70 is arranged so as to be aligned with the first moving device 60 in the vertical direction, and is arranged at a position lower than the first moving device 60. The second movement device 70 includes a second fixed rail 71 , a second movable member 72 , and a drive motor 73 . A connecting member 80 that is long in the vertical direction is attached to the front surfaces of the first movable member 62 and the second movable member 72. The first movable member 62 and the second movable member 72 are driven by drive motors 63 and 73, respectively, but are not limited to this and may be manually operated.

[0037] As shown in FIGS. 5 and 6, the connecting member 80 is a plate-like member that extends in the vertical direction and has an L-shaped cross section, and connects the first movable member 62 and the second movable member 72 together. The connecting member 80 moves integrally in the left-right direction in accordance with the driving operation of the first movable member 62 and the second movable member 72. A fixing member 40B is attached to the front surface of the upper and central portions of the connecting member 80. A second fixing member 50B is attached to the lower portion of the connecting member 80. With the above configuration, the fixing member 40B and the second fixing member 50B can move together with the connecting member 80 in the left-right direction. 6, a long hole (guide hole) that is long in the left-right direction is formed in the portion of the abutting member 10 that faces the fixed member 40B (shaft portion 42) and the second fixed member 50B (shaft portion 52). This allows the fixed member 40B and the second fixed member 50B to move in the left-right direction relative to the abutting member 10. 8 and 9, the fixing member 40B penetrates the connecting member 80, sandwiching the abutment member 10 and the joint bracket B2 (flange B2b) therebetween. The second fixing member 50B penetrates the connecting member 80, sandwiching the abutment member 10 and the main girder B1 (flange B1b) therebetween.

[0038] As described above, by providing the first moving device 60, second moving device 70, and connecting member 80, the fixing member 40B and second fixing member 50B can be moved together to correspond to joint brackets B2 of different widths. This allows the positioning jig 1 to be appropriately fixed to the main girder B1 and joint bracket B2. Note that there are several types of joint brackets B2, including those with widths of 300 mm and 400 mm.

[0039] In the above configuration, as shown in FIG. 7, the contact member 10 is formed with a plurality of openings 85 that penetrate the contact member 10 in the thickness direction. This allows for a further reduction in the weight of the positioning jig 1. Also, it becomes easier to visually check the attachment state of the positioning jig 1 to the girder B1 and the joint bracket B2.

[0040] In the above configuration, as shown in FIG. 7, a plurality of eyebolts 90 are fixed to the upper end portion, central portion and lower end portion of the contact member 10, onto which the lifting part L1 (lifting rope) can be hooked. Therefore, when removing the positioning jig 1, it can be lifted up using the lifting device L. Alternatively, it can be carried around using the lifting device L. The positioning jig 1 is a compact jig, and can be lifted and removed by an operator.

[0041] <Bracket fixing method using a positioning jig> Next, a bracket fixing method using the positioning jig 1 will be described with reference to Figures 2 to 4. Specifically, the fixing method involves fixing the positioning jig 1 to the flange B2b of the joint bracket B2, placing the joint bracket B2 with the positioning jig 1 fixed in a predetermined position on the side of the girder B1, and welding the joint bracket B2 to the side of the girder B1. The fixing method includes at least a "jig fixing process," a "lifting process," a "placing process," a "temporary fixing process," a "removal process," a "full fixing process," and a "welding process." In addition, explanations of the fixing work steps other than those described above will be omitted.

[0042] In the "jig fixing step", as shown in FIG. 2, an operator fixes the positioning jig 1 to the top surface of the flange B2b of the joint bracket B2 (step 1 (S1)). Specifically, the worker abuts the abutment member 10 of the positioning jig 1 against the top surface of the flange B2b of the joint bracket B2 and fixes it with multiple fixing members 40. At this time, the positioning jig 1 is fixed so that the end face (lower end face) of the support leg 30 and the end face of the joint bracket B2 are aligned (flush). The positioning jig 1 is also fixed so that it is sandwiched between the left and right extension members 20 (support legs 30). The fixing member 40B (second fixing member 50B) may be slid to a predetermined position in the left-right direction in accordance with the width of the joint bracket B2.

[0043] In the "lifting step," as shown in FIG. 3, a worker lifts the connection bracket B2 to which the positioning jig 1 is fixed using a lifting device L (step 2). Specifically, the worker hooks the hoisting metal fitting L2 attached to the tip of the hoisting device L (hoisting part L1) into the mounting hole B2d of the joint bracket B2. Then, the worker uses the hoisting device L to hoist and carry the joint bracket B2 to a predetermined position.

[0044] In the "placing step," as shown in FIG. 3, a worker places the joint bracket B2, to which the positioning jig 1 is fixed, at a predetermined location on the side of the main girder B1 (step 3). Specifically, the worker uses the lifting device L to lower the joint bracket B2 onto the side of the girder B1, which has been laid flat on its side, and places the joint bracket B2 on it. At this time, the worker places the joint bracket B2 on a predetermined location on the girder B1, with the top surface of the flange B1b of the girder B1 aligned with the top surface of the flange B2b of the joint bracket B2. Then, the left and right support legs 30 are placed on the side surfaces of the girder B1. This allows the joint bracket B2 to stand on its own on the side surface of the girder B1. Note that marking lines (marker lines) are drawn in advance at predetermined locations (predetermined locations in the length direction) on the girder B1. By aligning with these marking lines, the joint bracket B2 can be placed at the predetermined locations in the length direction of the girder B1. Furthermore, by using the left and right support legs 30, the joint bracket B2 can stand upright without tilting relative to the girder B1.

[0045] 3, in the "temporary fixing step," an operator brings the contact member 10 of the positioning jig 1 into contact with the top surface of the flange B1b of the girder B1, and temporarily fixes it with a plurality of second fixing members 50 (step 4). Specifically, the operator operates the handle portion 55 of the second fixing member 50, and clamps the contact member 10 and the flange B1b between the second fixing members 50. In the "removal process", a worker removes the lifting device L from the joint bracket B2 (step 5). By removing the lifting device L, it is no longer necessary to occupy the lifting device L for a long period of time.

[0046] In the "final fixing process," a worker fine-tunes the position of the joint bracket B2 relative to the main girder B1 by adjusting the fixing members 40A, 40B and the second fixing members 50A, 50B, or by using a predetermined tool. After fine-tuning the position of the joint bracket B2, it is finally fixed using the fixing members 40 and the second fixing members 50 (Step 6).

[0047] In the "welding process," as shown in FIG. 4, a worker welds a joint bracket B2 to the side of the main girder B1 (step 7). Specifically, the worker first temporarily welds the web main body B2a and second flange B2c of the joint bracket B2. Then, after removing the positioning jig 1, the worker finally welds the web main body B2a, flange B2b, and second flange B2c. This allows the joint bracket B2 to stand stably and independently even after the positioning jig 1 is removed. Alternatively, if the connection bracket B2 is stable and self-standing, the worker may remove the positioning jig 1 without performing temporary welding, and then perform final welding of the connection bracket B2. The bracket fixing method is completed through the above steps 1 to 7.

[0048] By using the positioning jig 1 (bracket fixing method using the positioning jig 1), the joint bracket B2 can be easily positioned on the side of the building's main girder B1, even with a relatively small jig. Furthermore, even when the joint bracket B2 is detached from the lifting device L, the joint bracket B2 can stand on its own and the position of the joint bracket B2 can be appropriately adjusted.

[0049] Second Embodiment Next, a positioning jig 101 according to a second embodiment will be described with reference to FIGS. The description of the same contents as those of the positioning jig 101 described above will be omitted.

[0050] The positioning jig 101 has a simpler shape and configuration than the positioning jig 1. The positioning jig 101 includes an abutment member 110, left and right side members 115, left and right extension members 120, left and right support legs 130, left and right fixing members 140, left and right second fixing members 150, a second abutment member 160, a third abutment member 170, and an opening 185.

[0051] The contact member 110 is a plate-like member that is long in the left-right direction. The left and right side members 115 are members having an L-shaped cross section, are attached to the front of the side portions of the abutting member 110, and extend elongated in the vertical direction. The left and right extension members 20 are connected to the left and right side members 115, respectively, and the left and right support legs 130 are connected to the extending ends of the left and right extension members 120.

[0052] The fixing member 140 and the second fixing member 150 are, for example, fixing clamps (vices), and are members provided separately from the positioning jig 101 (the main body of the positioning jig 101). The second contact member 160 is a plate-like member that is long in the left-right direction, and connects the upper end portions of the left and right side members 115 together. The third contact member 170 is a plate-shaped member that is elongated in the left-right direction, similar to the second contact member 160, and connects the center portions of the left and right side members 115 together. The left and right fixing members 140 sandwich the second abutment member 160 and the joint bracket B2 (flange B2b). The left and right second fixing members 150 sandwich the abutment member 110 and the girder B1 (flange B1b).

[0053] In the above configuration, a plurality of pressing bolts 165 are attached to the front surface of the second contact member 160. Furthermore, a plurality of pressing bolts 175 are attached to the front surface of the third contact member 170. By pressing (loosening) the pressing bolts 165, 175, the position and inclination of the joint bracket B2 relative to the main girder B1 (the position and inclination in the height direction of the joint bracket B2) can be finely adjusted.

[0054] In the above configuration, an opening 185 is formed in the area surrounded by the contact member 110, the left and right side members 115, and the second contact member 160 (third contact member 170). Furthermore, a plurality of second openings 186 are formed in the surfaces of the left and right side members 115 . This allows for a further reduction in the weight of the positioning jig 101. Also, it becomes easier to visually check the attachment state of the positioning jig 101 to the girder B1 and the joint bracket B2.

[0055] By using the positioning jig 101, it is possible to easily position the joint bracket B2 on the side surface of the main girder B1 of the building, even though it is a simpler (smaller) jig.

[0056] <Other embodiments> In the above embodiment, as shown in FIG. 1, the positioning jig 1 is used when fixing the joint bracket B2 to the side surface of the main girder B1, but this is not particularly limited. For example, the positioning jig 1 may be used when fixing a joint bracket B2 to the side of a pillar (column).In addition, the positioning jig 1 may be used when fixing a bracket having a flange to the side of a frame member having a flange.

[0057] In the above embodiment, the positioning jig and the bracket fixing method using the positioning jig according to the present invention have been mainly described. However, the above embodiment is merely an example for facilitating understanding of the present invention, and does not limit the present invention. The present invention can be modified and improved without departing from the spirit thereof, and the present invention naturally includes equivalents thereof. In particular, the above-described embodiments are merely examples and do not limit the present invention. [Explanation of symbols]

[0058] B1 Large beam (beam) B1a Web body B1b flange B1c Second flange (other flange) B2 Joint Bracket (Bracket) B2a Web body B2b flange B2c Second flange (other flange) B2d mounting hole B2e notch L Lifting device (crane) L1 Lifting section L2 Hanging hardware First Embodiment 1 Positioning jig 10. Contact member 11 Contact body part 12 Upper flange 13 Side flange 14 Lower flange 20 Extension member 30 Support leg (support member) 31 Script body part 32 Leg contact part 40, 40A, 40B Fixing member (fixing clamp) 41 Clamp body 42 Shaft 43 Holding part 44 Pressing part 45 Handle 50, 50A, 50B Second fixing member (second fixing clamp) 51 Clamp body 52 Shaft 53 Holding part 54 Pressing section 55 Handle 60 1st mobile device 61 First fixed rail 62 First movable rail 63 Drive motor 70 Second mobile device 71 First fixed rail 72 Movable rail 73 Drive motor 80 Connecting member 85 Opening 90 eyebolt Second Embodiment 101 Positioning jig 110 Contact member 115 Side members 120 Extension member 130 Support leg (support member) 140 Fixing member (fixing clamp) 150 Second fixing member (second fixing clamp) 160 first abutment member 165 Press bolt 170 third abutment member 175 Press bolt 185 Opening 186 Second Opening

Claims

1. A positioning jig used when fixing a bracket to the side of a pillar or beam of a building, for positioning the bracket with the flange surface of the pillar or beam aligned with the flange surface of the bracket, an elongated abutment member that abuts against a surface of the flange of the bracket; a fixing member attached to the abutment member and fixing the abutment member in a state in which the abutment member is in contact with a surface of the flange of the bracket; an extension member connected to a widthwise side portion of the abutment member and extending along a main body portion of the bracket beyond the flange of the bracket; a support member connected to the extension end of the extension member and supporting the bracket, When the bracket is placed on the side of the column or beam, The abutment member abuts against a flange surface of the bracket and a flange surface of the column or beam, the extension member extends along the main body of the column or beam beyond the flange of the column or beam and the flange of the bracket; The positioning jig is characterized in that the support member abuts against the side of the main body of the pillar or beam and supports the bracket.

2. The bracket is a joint bracket, The positioning jig is used when fixing the joint bracket to the side surface of the column or beam, and is a jig for positioning the joint bracket, a second fixing member attached to the abutment member and fixing the abutment member in a state in which the abutment member is in abutment against a surface of the flange of the column or beam; the extension members are provided on the left and right side portions of the contact member, and extend in a direction perpendicular to the longitudinal direction of the contact member, 2. The positioning jig according to claim 1, wherein the support members are support legs that extend from the extending ends of the left and right extending members in a direction perpendicular to the extending direction of the extending members and support the bracket.

3. The abutment member abuts against a top surface of a flange of the bracket and a top surface of a flange of the column or beam, The left and right extension members extend from the abutment member along the side surfaces of the web main body portion of the bracket and the side surfaces of the web main body portion of the column or beam, When the bracket is placed on the side surface of the column or beam, the left and right support legs abut against the side surface of the column or beam together with the bracket, 3. The positioning jig according to claim 2, wherein the positioning jig supports the bracket in a self-standing state on a side surface of the pillar or beam.

4. the fixing members are integrally attached to the left and right side portions of the abutment member, and fix the abutment member by sandwiching the abutment member and the flange of the bracket; The positioning jig described in claim 2 or 3, characterized in that the second fixing member is positioned at a different position from the fixing member in the longitudinal direction of the abutment member, is integrally attached to the left and right side portions of the abutment member, and fixes the abutment member by sandwiching the abutment member and the flange of the column or beam.

5. a first moving device that attaches at least one of the left and right fixed members to the contact member so as to be movable in a width direction of the contact member; The positioning jig according to claim 4, further comprising a second moving device that mounts at least one of the second fixing members on the left and right sides relative to the abutment member so that the second fixing member can be moved in the width direction of the abutment member.

6. the first moving device includes a first fixed rail fixed to the abutting member and extending along a width direction of the abutting member, and a first movable rail attached to be slidable relative to the first fixed rail, the fixed member is attached to the first movable rail and slides together with the first movable rail; the second moving device includes a second fixed rail fixed to the contact member and extending along a width direction of the contact member, and a second movable rail attached to be slidable relative to the second fixed rail, 6. The positioning jig according to claim 5, wherein the second fixed member is attached to the second movable rail and slides together with the second movable rail.

7. The positioning jig described in claim 5, characterized in that a plurality of openings penetrating the thickness direction of the abutment member are formed in a portion of the abutment member other than the portion to which the fixed member, the second fixed member, the extension member, the first moving device, and the second moving device are attached.

8. A bracket fixing method using the positioning jig according to claim 1, a jig fixing step of fixing the positioning jig to a top surface of the flange of the bracket; a lifting step of lifting the bracket to which the positioning jig is fixed by a lifting device; a placing step of placing the bracket to which the positioning jig is fixed on a predetermined location on a side surface of the column or beam; a removal step of removing the lifting device from the bracket; a welding step of welding the bracket to a predetermined location on a side surface of the column or beam, In the jig fixing step, the positioning jig is fixed so that an end surface of the bracket and an end surface of the support member are aligned with each other; A bracket fixing method using a positioning jig, characterized in that in the placing process, the support member and the bracket are abutted against the side of the column or beam, and the bracket is placed in a free-standing state on the side of the column or beam.

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