jig

Abstract

To position a joint plate suitably in a simple structure in joining the joint plate placed in a horizontal state to a web of a steel material.SOLUTION: A jig 10 of the invention comprises a jig body 12 having a placement surface 20 for placing a lower surface of a joint plate 60 in joining the joint plate 60 to a web 52 of a steel material 50 extending in a horizontal direction and a magnet 14 for holding the joint plate 60 on the placement surface 20, in which the jig body 12 in a state where the joint plate 60 is held on the placement surface 20 is placed on a flange 54 of the steel material 50 so that the joint plate 60 is positioned in a height direction of the web 52.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a jig, and particularly to a jig used when joining a joining plate to a web of a steel material extending in the horizontal direction.

Background Art

[0002] In the framework or structure of a building such as a building, a gusset plate for connecting another steel material (for example, a purlin, etc.) or a rib plate for reinforcement, etc. may be joined to the steel material which is a component thereof. In this case, the gusset plate and the rib plate are joined to the web of the steel material in a state of being erected perpendicular to the ground.

[0003] In addition, there may be a case where a plate (joining plate) placed in a horizontal state is joined to the web together with the gusset plate or the rib plate (for example, see Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] When joining a joining plate placed in a horizontal state to a web, it is necessary to hold the joining plate at a predetermined position in the height direction (that is, the vertical direction) of the web. Therefore, it is required to position the above joining plate with a simple configuration.

[0006] Therefore, the present invention has been made in view of the above problems, and the object thereof is to appropriately position the joining plate with a simple configuration when joining a joining plate placed in a horizontal state to the web of a steel material.

Means for Solving the Problems

[0007] The above problems are solved by the jig of the present invention, which comprises a jig body having a mounting surface on which one end face in the thickness direction of the joining plate is placed when joining a joining plate to a web of steel material extending horizontally, and a magnet for holding the joining plate on the mounting surface, and the jig body with the joining plate held on the mounting surface is placed on the flange of the steel material, thereby positioning the joining plate in the height direction of the web. According to the jig of the present invention configured as described above, the joining plates can be appropriately positioned with a simple configuration.

[0008] Furthermore, in the above-described jig, the jig body preferably has a base portion with a mounting surface, the lower end of the base portion has a curved corner portion, and the jig body is preferably placed on the flange with the corner portion adjacent to the intersection of the flange and the web. With the above configuration, the jig body can be positioned on the flange to match the shape of the intersection between the flange and the web of the steel material.

[0009] Furthermore, in the above-described jig, a recess extending in the first direction is formed on the mounting surface, the jig body is placed on the flange with the direction penetrating the web and the first direction aligned, and when the joining plate is held on the mounting surface, it is preferable that the recess faces the edge of the joining plate on the mounting surface. With the above configuration, interference with the edges of the connecting plate can be avoided, and the connecting plate can be held on the mounting surface.

[0010] Furthermore, in the above-described jig, it is even more preferable that the jig body has a wall portion that rises from the mounting surface and extends in a first direction, and that recesses are provided on both sides of the wall portion in a second direction that intersects with the first direction. With the above configuration, interference between the end of the joint plate and the wall can be avoided, and the effect of forming a recess on the mounting surface can be more effectively realized.

[0011] Furthermore, in the above-described jig, it is even more preferable that the wall portion rises from the center of the mounting surface in the second direction, and that the connecting plate is placed on each of two adjacent regions of the mounting surface that are separated by the wall portion in the second direction. With the above configuration, it is possible to place multiple joining plates on the mounting surface, improving the usability of the jig and allowing for more efficient positioning of the joining plates with the jig while joining them to the web.

[0012] Furthermore, in the above-described jig, the jig body has a base portion with a mounting surface and a protruding portion that extends from the bottom surface of the base portion, and it is even more preferable that the jig is placed on the flange with the protruding portion in contact with the upper surface of the flange. With the above configuration, the bottom surface of the base can be raised from the flange, allowing the jig body to be placed on the flange. For example, even if foreign objects are present on the upper surface of the flange, the jig body can be properly set on the flange.

[0013] Furthermore, in the above-described jig, it is even more preferable that the jig body has a ball plunger attached to the base, and the protruding part is the ball portion of the ball plunger. With the above configuration, a simpler setup is possible, allowing the bottom surface of the base to be lifted from the flange and the jig body to be placed on the flange.

[0014] Furthermore, in the above-mentioned jig, it is more preferable that the material constituting the base portion is polylactic acid. According to the above configuration, the base is easy to mold, and the manufacturing of the jig body becomes easier. In addition, since the base is formed by resin molding, a lighter jig can be realized.

[0015] Furthermore, it is preferable that a heat-resistant sheet be attached to the surface of the base portion of the jig described above. According to the above configuration, when joining the joint plate to the web by welding or the like, damage to the base portion due to welding heat can be suppressed. [Effects of the Invention]

[0016] By using the jig of the present invention, when joining a joining plate placed in a horizontal state to the web of a steel material, the joining plate can be positioned with a simple configuration.

Brief Description of the Drawings

[0017] [Figure 1] It is a diagram showing a state where a joining plate is positioned using a jig according to an embodiment of the present invention. [Figure 2] It is a perspective view of a jig according to an embodiment of the present invention. [Figure 3] It is a plan view of a jig according to an embodiment of the present invention. [Figure 4] It is a side view of a jig according to an embodiment of the present invention. [Figure 5] It is a bottom view of a jig according to an embodiment of the present invention. [Figure 6] It is a rear view of a jig according to an embodiment of the present invention. [Figure 7] It is a diagram showing the I-I cross section of FIG. 3. [Figure 8] It is a diagram showing the jig set on the web of the steel material, and is a view seen from above the jig. [Figure 9] It is a diagram showing the jig set on the web of the steel material, and is a view seen from the longitudinal direction of the steel material. [Figure 10] It is a diagram showing the jig set on the web of the steel material, and is a view seen from the back side of the jig.

Modes for Carrying Out the Invention

[0018] <<Regarding One Embodiment of the Present Invention>> Hereinafter, a jig according to one embodiment of the present invention (hereinafter, this embodiment) will be described with reference to the accompanying drawings.

[0019] The position, orientation, and posture of each part of the jig described below refer to the position, orientation, and posture of the jig when it is in use, unless otherwise specified. For example, the upper (lower) side of the jig refers to the upper (lower) side as viewed from the jig in use, i.e., the jig in the state of positioning the joining plate.

[0020] Furthermore, in this specification, "horizontal," "vertical," "orthogonal," and "parallel" include a range of errors that are generally acceptable in the art of the present invention, and also include deviations of less than a few degrees (e.g., 2-3°) from strictly horizontal, vertical, orthogonal, and parallel.

[0021] The jig according to this embodiment (hereinafter referred to as jig 10) is used when joining a horizontally placed joining plate 60 to the web 52 of a horizontally placed steel material 50 during construction work of a building or the like, as shown in Figure 1.

[0022] The steel member 50 forms a horizontally extending portion (e.g., a main beam) of the building frame or the framework of a structure other than a building, and is equipped with flanges 54 and 56 at the upper and lower ends of the web 52, and is specifically an H-shaped steel. Rib plates 58 and connecting plates 60 are joined, specifically welded, to predetermined positions on the web 52 for reinforcement purposes. The rib plates 58 are welded to the web 52 while standing perpendicular to the ground.

[0023] The joining plate 60 is a so-called horizontal brace sheet and is welded to the web 52 in a horizontal position (in other words, with the plate thickness direction aligned with the vertical direction). The joining plate 60 is welded to the web 52 at a predetermined position in the height direction (i.e., the vertical direction), more specifically, at a position where the distance from the lower flange 54 is a predetermined length.

[0024] To elaborate on the joining plate 60, it is made of a metal plate cut from the base material in a roughly rectangular shape. As can be seen in Figure 1, of the four sides forming the outer edge of the joining plate 60, one side is joined (welded) to the web 52, and the other side perpendicular to that side is joined (welded) to the rib plate 58. In this embodiment, the joining plates 60 are welded to both sides of the rib plate 58 in the extension direction (longitudinal direction) of the steel material 50 (see Figure 10). However, it is not limited to this, and the joining plate 60 may be welded to one side of the rib plate 58.

[0025] The configuration of the jig 10 is as follows: The jig 10 has the external shape shown in Figures 2 to 6, and comprises a jig body 12 and a magnet 14, as shown in the figures. Figures 2 to 4 and 6 show the jig 10 with the joining plate 60 placed on the mounting surface 20 (more specifically, one of the two adjacent areas on the mounting surface 20).

[0026] The jig body 12 is the part of the jig 10 other than the magnet 14. As shown in Figures 2 to 6, the jig body 12 comprises a base 16 and a ball plunger 40. The base portion 16 is a roughly rectangular parallelepiped-shaped member that is small enough to be held in one hand, and an L-shaped handle 18 is provided on one side. In this embodiment, the base portion 16 is a resin molded product, and is made of, for example, poly-lactic acid (PLA). Since PLA is a material that is widely used in 3D printing, the base portion 16 can be easily molded using a 3D printer.

[0027] The upper surface of the base portion 16 is a flat surface except for the recess 26 described later, and constitutes a mounting surface 20 on which the lower surface of the joining plate 60 rests when the joining plate 60 is joined. The lower surface of the joining plate 60 corresponds to one end surface in the thickness direction of the joining plate 60. The mounting surface 20 is approximately rectangular in shape and extends in a first direction and a second direction. The first direction is the short side direction of the mounting surface 20, and the second direction is the long side direction of the mounting surface 20 and is perpendicular to the first direction.

[0028] As shown in Figure 4, the lower end of the base portion 16 is provided with a rounded corner, that is, an arc-shaped curved corner (hereinafter referred to as the first corner portion 28), at the end in the first direction, more specifically, at the end opposite to the handle 18. Furthermore, as shown in Figure 6, the lower end of the base portion 16 is provided with rounded corners, that is, arc-shaped curved corners (hereinafter referred to as the second corner portions 30), at both ends in the second direction.

[0029] Furthermore, as shown in Figures 2 and 3, the base portion 16 has a wall portion 22 and a restricting portion 24 that rise vertically from the mounting surface 20. As shown in Figure 2, the wall portion 22 has a rib shape and rises from the center of the mounting surface 20 in the second direction and extends in the first direction. In other words, the mounting surface 20 is divided into multiple regions in the second direction by the wall portion 22. In this embodiment, since there is one wall portion 22, the mounting surface 20 is divided into two regions by the wall portion 22. However, it is not limited to this, and there may be two or more wall portions 22, in which case the mounting surface 20 will be divided into a number of regions corresponding to the number of wall portions 22 (specifically, the number of wall portions 22 - 1).

[0030] As can be seen from Figures 2 and 3, in the mounting surface 20, each of the two adjacent regions separated by the wall 22 in the second direction is configured to support one joining plate 60. Specifically, each of the two regions has sufficient area to support one joining plate 60. In other words, in this embodiment, a single jig 10 can hold multiple (two in this embodiment) joining plates 60 at once.

[0031] As shown in Figure 2, the restricting portion 24 has a rib shape, rising from the end on the side where the handle 18 is provided in the first direction and extending in the second direction. The restricting portion 24 can lock with the connecting plate 60 when the connecting plate 60 on the mounting surface 20 moves toward the handle 18 in the first direction, thereby restricting further movement of the connecting plate 60.

[0032] Furthermore, as shown in Figures 3 and 7, recesses 26 are provided on both sides of the wall portion 22 in the second direction on the mounting surface 20. The recesses 26 are formed by recessing the portion of the mounting surface 20 adjacent to the wall portion 22, and extend in the first direction. In this embodiment, they are continuous from one end to the other of the base portion 16 in the first direction. Also, as shown in Figure 7, the lower edge of the recess 26 (more specifically, the edge on the wall portion 22 side) is given a rounded edge (R), which suppresses stress concentration at the lower edge of the recess 26.

[0033] Furthermore, a heat-resistant sheet 32 ​​is attached to the surface of the base portion 16, as shown in Figures 2 to 4. In this embodiment, the heat-resistant sheet 32 ​​is attached to the surface of the upper corner portion of the base portion 16, more specifically, to the surface of the upper corner portion located at both ends in the second direction, and to the surface of the upper corner portion located at the end opposite to the handle 18 side in the first direction. The specifications of the heat-resistant sheet 32 ​​are such that it has a heat resistance temperature of 400 degrees Celsius or higher, and more preferably, a heat resistance temperature of 800 degrees Celsius or higher. An example of a heat-resistant sheet 32 ​​with a heat resistance temperature of 800 degrees Celsius or higher is the heat insulation sheet (model HIPSKH) from Misumi Corporation.

[0034] As shown in Figure 5, the ball plunger 40 is attached to the lower end of the base portion 16. Specifically, the cylindrical main body portion (not shown) of the ball plunger 40 is fitted into insertion holes (not shown) formed at each of the four corners of the bottom surface 34 of the base portion 16. When the ball plunger 40 is attached to the base portion 16, the ball portion 42 provided at the tip of the ball plunger 40 protrudes below (outward) the bottom surface 34. In other words, in this embodiment, the ball portion 42 constitutes a protruding portion that extends from the bottom surface of the base portion.

[0035] The magnet 14 is provided on the mounting surface 20 to hold the joining plate 60, and in this embodiment, it is a round or ring-shaped magnet. Also, in this embodiment, as shown in Figures 2 and 3, the surface of the magnet 14 is exposed on the mounting surface 20. Specifically, the mounting surface 20 has a recessed fitting portion (not shown) corresponding to the outer shape of the magnet 14, and the magnet 14 is fitted into this fitting portion. As a result, the surface of the magnet 14 (more specifically, the upper end surface) is exposed on the mounting surface 20. The exposed surface of the magnet 14 is on the same plane as the mounting surface 20 and is continuous with the mounting surface 20. In other words, the surface of the magnet 14, together with the mounting surface 20, constitutes a flat surface.

[0036] Then, when the connecting plate 60 is placed on the mounting surface 20, the exposed surface of the magnet 14 comes into contact with the connecting plate 60, and the magnetic force of the magnet 14 holds the connecting plate 60 on the mounting surface 20.

[0037] Furthermore, in this embodiment, as described above, the mounting surface 20 is divided into two regions by the wall portion 22, and one magnet 14 is provided in each of the two adjacent regions of the mounting surface 20 that are separated by the wall portion 22 in the second direction (see Figure 8). In other words, the magnets 14 are provided in an exposed state in each of the two regions. The number of magnets 14 provided on the jig 10, or more specifically, the number of magnets 14 provided for each of the two regions on the mounting surface 20 that are adjacent to each other by the wall portion 22, is not particularly limited and can be set to any number.

[0038] Furthermore, the installation position of the magnet 14, more specifically the position where the magnet 14 is exposed on the mounting surface 20, is not particularly limited, but a position where it can contact the joining plate 60 placed on the mounting surface 20 is preferred. For example, if the joining plate 60 is provided with a through hole 61 as shown in Figure 3, it is preferable that the magnet 14 be positioned offset from the through hole 61 when the joining plate 60 is placed on the mounting surface 20.

[0039] Next, we will explain how to use the jig 10, that is, how to position the joining plate 60 using the jig 10 and hold the joining plate 60 in the positioned position.

[0040] First, the joining plate 60 is placed on the mounting surface 20. At this time, the joining plate 60 may be placed in only one of the two adjacent areas of the mounting surface 20 that are separated by the wall portion 22 in the second direction, or it may be placed in both areas. If a joining plate 60 is placed in each of the two areas, multiple joining plates 60 can be held by the jig 10 at once. This allows the joining (welding) of one joining plate 60 to be smoothly moved to the next welding location after the joining (welding) of one joining plate 60 is completed. As a result, the work of welding multiple joining plates 60 to the web 52 can be carried out efficiently.

[0041] On the mounting surface 20, the joining plate 60 is positioned so as to abut against the wall portion 22 and the restricting portion 24, respectively. This positions the joining plate 60 in the direction along the mounting surface 20, i.e., in the first and second directions.

[0042] Furthermore, the joint plate 60 on the mounting surface 20 is held on the mounting surface 20 by the magnetic force of the magnet 14 when it comes into contact with the magnet 14, thereby fixing the position of the joint plate 60 on the mounting surface 20. Also, when the joint plate 60 is held on the mounting surface 20 by the magnet 14, as shown in Figure 7, the recess 26 faces the side edge of the joint plate 60 on the mounting surface 20 in the vertical direction (thickness direction of the joint plate 60). The side edge of the joint plate 60 corresponds to the edge of the joint plate 60 in the second direction, and burrs may be generated on the side edge of the joint plate 60 when the joint plate 60 is cut from the base material. In this embodiment, since the recess 26 faces the side edge of the joint plate 60 on the mounting surface 20, even if burrs are generated on the side edge of the joint plate 60, the burrs can be avoided, and damage to the base portion 16 due to contact with the burrs can be avoided.

[0043] In particular, in this embodiment, recesses 26 are provided on both sides of the wall portion 22, which prevents the wall portion 22 from being damaged by contact with burrs on the side edges of the joining plate 60. In other words, in this embodiment, by providing recesses 26 on both sides of the wall portion 22, the effect of avoiding contact with burrs by the recesses 26 becomes more significant.

[0044] Next, with the joining plate 60 held on the mounting surface 20 as described above, the jig body 12 is placed on the flange 54 of the steel material 50 which is extended horizontally. At this time, as shown in Figures 8 and 9, the jig body 12 is placed on the flange 54 with the direction that penetrates the web 52 (indicated as the "penetration direction" in the figures) and the first direction aligned, more specifically, with these two directions parallel to each other. Also, when the jig body 12 is placed on the flange 54, the mounting surface 20 becomes a horizontal plane.

[0045] Furthermore, in this embodiment, the ball portion 42 (protruding portion) of the ball plunger 40 protrudes from the bottom surface 34 of the base portion 16, and the jig body 12 is placed on the flange 54 with the ball portion 42 in contact with the upper surface of the flange 54. In other words, as shown in Figure 10, the jig body 12 is placed on the flange 54 with its bottom surface 34 slightly raised from the upper surface of the flange 54.

[0046] Then, by placing the jig body 12 on the flange 54, the joining plate 60 on the mounting surface 20 is positioned in the height direction (vertical direction) of the web 52. Specifically, the joining plate 60 is positioned at a distance from the upper surface of the flange 54 by an amount equivalent to the height of the jig body 12. In other words, the height of the jig body 12 is set based on the welding position of the joining plate 60 in the height direction of the web 52, and by placing the jig body 12 on the flange 54, the joining plate 60 can be positioned at the correct welding position in the height direction of the web 52.

[0047] After the joining plate 60 is positioned in the height direction of the web 52 as described above, the jig body 12 is moved on the flange 54 so that the joining plate 60 contacts the web 52 and the rib plate 58 in the longitudinal direction of the steel material 50 and in the direction that penetrates the web 52. During this time, as shown in Figure 9, the jig body 12 is placed on the flange 54 with the first corner 28 of the base portion 16 adjacent to the lower inner corner 50A of the steel material 50. The lower inner corner 50A of the steel material 50 is the intersection of the flange 54 and the web 52, and is curved in an arc shape as shown in Figure 9.

[0048] Furthermore, as mentioned above, the first corner 28 of the base portion 16 is curved in an arc shape, and its radius of curvature is larger than that of the lower inner corner portion 50A. This prevents interference between the first corner portion 28 and the lower inner corner portion 50A when the jig body 12 is positioned where the joining plate 60 contacts the web 52, and as a result, the joining plate 60 can be reliably brought into contact with the web 52.

[0049] Furthermore, when the jig body 12 is positioned so that the joining plate 60 abuts against the rib plate 58, the second corner 30 of the base portion 16 is adjacent to the welding point 50B between the rib plate 58 and the flange 54, as shown in Figure 10. However, since the second corner 30 is curved in an arc shape as described above, interference with the welding point 50B can be avoided, and as a result, the joining plate 60 can be reliably brought into contact with the rib plate 58.

[0050] After bringing the joining plate 60 into contact with the web 52 and the rib plate 58, the joining plate 60 is welded to the web 52 and the rib plate 58. During welding, the joining plate 60 is held on the mounting surface 20; in other words, the jig body 12, more specifically the base portion 16, is positioned beneath the joining plate 60. Meanwhile, a heat-resistant sheet 32 ​​is attached to the surface of the upper corner portion of the base portion 16. This helps to suppress damage to the base portion 16 due to the heat of welding.

[0051] Furthermore, from the viewpoint of effectively suppressing damage caused by welding heat, it is preferable that the heat-resistant sheet 32 ​​be attached to an appropriate position on the surface of the base portion 16. For example, it is preferable to attach it to the upper corner surface of the base portion 16 at a position corresponding to the center of the welded edge. The welded edge is one of the four sides that constitute the outer edge of the joint plate 60 and is welded to the web 52 or rib plate 58.

[0052] As described above, by using the jig 10 of this embodiment, the joining plate 60 can be easily positioned in the height direction of the web 52. Furthermore, the jig 10 of this embodiment stably holds the joining plate 60 on the mounting surface 20, and as a result, the position of the joined plate 60 can be easily and effectively maintained during welding.

[0053] To explain in more detail, conventionally, when welding the joint plate 60, a piece of steel or steel pipe was inserted as a spacer between the flange 54 and the joint plate 60. However, such a spacer could not properly restrain the position of the joint plate 60, so the worker had to hold the joint plate 60 by hand during welding. In this case, the position of the joint plate 60 was unstable, and it was sometimes impossible to weld the joint plate 60 properly. In contrast, with the jig 10 of this embodiment, the worker does not need to hold the welding plate 60 by hand, and the position of the joining plate 60 after positioning can be stabilized. This improves the work efficiency when welding the joining plate 60.

[0054] Furthermore, according to the jig 10 of this embodiment, the jig body 12 can be placed on the flange 54 with the bottom surface 34 of the base portion 16 lifted off the top surface of the flange 54 by the ball plunger 40. As a result, even if foreign matter such as welding spatter is present on the flange 54, the joint plate 60 on the mounting surface 20 can be properly positioned in the height direction of the web 52 without being affected by the foreign matter.

[0055] Furthermore, after the welding of the joint plate 60 is completed, the jig 10 is pulled out from between the joint plate 60 and the flange 54. However, at this time, the joint plate 60 may deform (warp) due to the heat generated during welding, which may reduce the gap between the joint plate 60 and the flange 54. Even in such cases, the lifting and lowering function of the spring built into the ball plunger 40 allows the entire jig 10 to move up and down, enabling the jig 10 to be pulled out without any problems. In addition, the forward and backward movement function of the ball portion 42 enables the smooth removal of the jig 10.

[0056] <<Regarding other embodiments>> Although one embodiment of the jig of the present invention has been described above, the above embodiment is merely an example to facilitate understanding of the present invention and does not limit it. In other words, the present invention can be modified and improved without departing from its spirit. Furthermore, it goes without saying that the present invention includes equivalents thereof.

[0057] In the above embodiment, the shape of the base portion 16 is assumed to be a substantially rectangular parallelepiped, but the external shape of the base portion 16 is not limited to any shape that can appropriately position the joining plate 60, and in that respect, it can be any shape. Furthermore, the material of the base portion 16 is not limited to PLA, but any material suitable from the viewpoint of moldability (ease of molding) and weight is acceptable, and heat-resistant resins other than PLA may be used as the material of the base portion 16.

[0058] Furthermore, in the above embodiment, the mounting surface 20 is divided into multiple regions by the wall portion 22, and a joining plate 60 can be placed in each region. However, it is not limited to this, and the number of joining plates 60 placed on the mounting surface 20 may be only one. However, if multiple joining plates 60 can be placed on the mounting surface 20 at once, the work of positioning each of the multiple joining plates 60 and joining them to the web 52 can be performed more efficiently. In this respect, the above embodiment is preferable.

[0059] Furthermore, in the above embodiment, the surface (upper end surface) of the magnet 14 is exposed on the mounting surface 20. However, if the magnetic force of the magnet 14 acts sufficiently on the joining plate 60, and as a result the joining plate 60 is stably held on the mounting surface 20, the magnet 14 does not necessarily have to be exposed. For example, the magnet 14 may be located below the mounting surface 20, and specifically, the magnet 14 may be embedded inside the base portion 16. [Explanation of Symbols]

[0060] 10 jigs 12. Jig body 14 Magnets 16 Daibu 18 Handle 20 Mounting surface 22 Wall 24 Regulatory Department 26 recesses 28 1st corner 30 Second corner 32 Heat-resistant sheet 34 Bottom 40 Ball Plungers 42 Ball section (protruding part) 50 Steel 50A Lower inner corner 50B Welding location 52 Web 54 Flange 56 Flange 58 Rib Plate 60 Joint plate 61 Through hole

Claims

1. When joining a joint plate to a web of steel material extending horizontally, a jig body having a mounting surface on which one end face in the thickness direction of the joint plate is placed, The mounting surface includes a magnet for holding the connecting plate, The jig body, with the joining plate held on the mounting surface, is placed on the flange of the steel material to position the joining plate in the height direction of the web. The mounting surface has a recess formed therein that extends in the first direction. The jig body is placed on the flange such that the direction penetrating the web and the first direction are aligned. A jig in which, when the joining plate is held on the mounting surface, the recess faces the edge of the joining plate on the mounting surface.

2. When joining a joint plate to a web of steel material extending horizontally, a jig body having a mounting surface on which one end face in the thickness direction of the joint plate is placed, The mounting surface includes a magnet for holding the connecting plate, The jig body, with the joining plate held on the mounting surface, is placed on the flange of the steel material to position the joining plate in the height direction of the web. The jig body has a base portion having the aforementioned mounting surface and a projection portion protruding from the bottom surface of the base portion, and is placed on the flange with the projection portion in contact with the upper surface of the flange. The jig body further includes a ball plunger attached to the base portion, The aforementioned protruding portion is the ball portion of the ball plunger, in this jig.

3. When joining a joint plate to a web of steel material extending horizontally, a jig body having a mounting surface on which one end face in the thickness direction of the joint plate is placed, The mounting surface includes a magnet for holding the connecting plate, The jig body, with the joining plate held on the mounting surface, is placed on the flange of the steel material to position the joining plate in the height direction of the web. The jig body has a base portion having the aforementioned mounting surface, A jig having a heat-resistant sheet attached to the surface of the base portion.

4. The jig body has a base portion having the aforementioned mounting surface, The lower end of the base portion is provided with a curved corner, The jig according to any one of claims 1 to 3, wherein the jig body is placed on the flange such that the corner portion is adjacent to the intersection portion of the flange and the web.

5. The jig body has a wall portion that rises from the aforementioned mounting surface and extends in the first direction, The jig according to claim 1, wherein the recesses are provided on both sides of the wall portion in a second direction intersecting the first direction.

6. The wall portion rises from the center of the aforementioned mounting surface in the second direction, The jig according to claim 5, wherein the connecting plate is placed on each of two adjacent regions of the mounting surface that are separated by the wall in the second direction.

7. The jig body comprises a base portion having the aforementioned mounting surface and a protruding portion protruding from the bottom surface of the base portion, and is placed on the flange with the protruding portion in contact with the upper surface of the flange, according to any one of claims 1, 3, 4, 5, and 6.

8. The jig according to any one of claims 2, 3, 4, and 7, wherein the material constituting the base portion is polylactic acid.

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