Reinforcing member and reinforcing structure

Abstract

To provide a high-strength, low-cost reinforcing member and reinforcing structure.SOLUTION: A reinforcing member 100 includes a plate-shaped main body 1 having a circular through hole 10 perpendicular to the plate surface. The main body 1 has a pair of first side portions 2, 2 facing each other across the through hole 10, and a pair of second side portions 4, 4 extending in a direction intersecting the first side portions 2, 2 and facing each other across the through hole 10. The second side portions 4, 4 have arc-shaped side portions 41, 41 having an arc-shaped convex radially outward from the through hole 10. The radius of curvature of the arc-shaped side portions 41, 41 is 0.80 to 1.50 times the diameter of the through hole 10.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a reinforcing member and a reinforcing structure. [Background technology]

[0002] Patent Document 1 describes a reinforcing member and a reinforcing structure for a steel beam with holes. This reinforcing member is used to reinforce a steel beam with holes having a through hole in the web. This reinforcing member has a main body attached around the through hole formed in the web, and a circular hole provided through both the front and back surfaces of the main body. In this reinforcing member, the outer peripheral edge of the main body has a pair of opposing linear parts and a pair of joint parts symmetrical with respect to an axis perpendicular to the linear parts. Each of the joint parts has a first part having a curved shape that bulges outward in the radial direction of the hole, and a second part that is continuous with the first part and has a substantially linear shape or a curved shape that curves in the opposite direction to the first part. In the reinforcing structure for a steel beam with holes, this reinforcing member is attached to the web so that the linear parts are substantially parallel to the beam axis direction, and the pair of joint parts are joined to the web by fillet welding. In this reinforcing structure, the entire circumference of the linear parts and the hole parts does not need to be welded, and it is said that the welding workability is improved and a sufficient reinforcing effect is obtained. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-79580 A Summary of the Invention [Problem to be solved by the invention]

[0004] In order to reduce the construction costs and improve the strength of buildings, there is a demand for reinforcing members and reinforcing structures that have higher strength but are lower in cost than conventional reinforcing members and reinforcing structures.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a reinforcing member and a reinforcing structure that have high strength and are low cost. [Means for solving the problem]

[0006] In order to achieve the above object, the reinforcing member according to the present invention comprises: A plate-shaped main body having a circular through hole perpendicular to a plate surface, The main body portion is A pair of first side portions opposed to each other across the through hole; a pair of second side portions extending in a direction intersecting the first side portion and facing each other across the through hole; The second side portion has an arc-shaped side portion having a convex arc-shaped shape on a radially outer side of the through hole, The radius of curvature of the arcuate side portion is not less than 0.80 times and not more than 1.50 times the diameter of the through hole.

[0007] The reinforcing member according to the present invention further comprises: The pair of first side portions may be straight.

[0008] The reinforcing member according to the present invention further comprises: The pair of first side portions are parallel to each other, The pair of second side portions may be symmetrical with respect to a virtual line that passes through a center of the through hole and is perpendicular to the first side portions.

[0009] The reinforcing member according to the present invention further comprises: The distance between the end of the first side portion and the periphery of the through hole in a direction along a perpendicular line to the first side portion may be 0.20 to 0.55 times the radius of curvature of the arcuate side portion.

[0010] The reinforcing member according to the present invention further comprises: The angle between a virtual line passing through the center of the through hole and perpendicular to the first side portion and a virtual line passing through the center of the through hole and the intersection where the circle of curvature of the arc-shaped side portion intersects with the first side portion may be greater than or equal to 25 degrees and less than or equal to 45 degrees.

[0011] The reinforcing member according to the present invention further comprises: The distance between the center of the circle of curvature of the arc-shaped side portion and the center of the through hole may be 0.20 to 0.85 times the diameter of the through hole.

[0012] The reinforcing member according to the present invention further comprises: a protrusion portion is formed on an end portion of the second side portion on the side of the first side portion, the protrusion portion extending outside the circle of curvature of the arc-shaped side portion, The protrusion may extend in a direction along an extension direction of the first side portion.

[0013] The reinforcing member according to the present invention further comprises: The second side portion further includes an arc-shaped step surface portion disposed between the first side portion and the arc-shaped side portion, The arc-shaped step surface portion has an arc-shaped shape that is convex radially outward of the through hole, The center of the circle of curvature of the arcuate step surface portion may overlap with the center of the through hole.

[0014] The reinforcing member according to the present invention further comprises: The second side portion further includes an arc-shaped step surface portion disposed between the first side portion and the arc-shaped side portion, a protrusion portion is formed on an end portion of the second side portion on the side of the first side portion, the protrusion portion extending outside the circle of curvature of the arc-shaped side portion, The arc-shaped step surface portion has an arc-shaped shape that is convex radially outward of the through hole, a center of a circle of curvature of the arc-shaped step surface portion overlaps with a center of the through hole, The protrusion extends in a direction along an extension direction of the first side portion, The thickness of the protrusion in a thickness direction of the main body may be thinner than that of the arcuate side portion.

[0015] The reinforcing member according to the present invention further comprises: The main body portion has a thick-walled portion that is thick in a thickness direction of the main body portion along an outer periphery of the through hole, The thick portion may be annular in a front view, and a center of the ring may overlap with a center of the through hole.

[0016] The reinforcing member according to the present invention further comprises: The main body portion has a thick-walled portion that is thick in a thickness direction of the main body portion along an outer periphery of the through hole, The second side portion further includes an arc-shaped step surface portion disposed between the first side portion and the arc-shaped side portion, The thick-walled portion is annular in front view, and a center of the ring overlaps with a center of the through hole, a protrusion portion is formed on an end portion of the second side portion on the side of the first side portion, the protrusion portion extending outside the circle of curvature of the arc-shaped side portion, The arc-shaped step surface portion has an arc-shaped shape that is convex radially outward of the through hole, a center of a circle of curvature of the arc-shaped step surface portion overlaps with a center of the through hole, The protrusion extends in a direction along an extension direction of the first side portion, The thickness of the protrusion in a thickness direction of the main body may be thinner than that of the arcuate side portion.

[0017] The reinforcing member according to the present invention further comprises: a protrusion portion is formed on an end portion of the second side portion on the side of the first side portion, the protrusion portion extending outside the circle of curvature of the arc-shaped side portion, the protruding portion has a protruding side portion along a second circle of curvature whose center overlaps with the center of the circle of curvature of the arc-shaped side portion, The length of a side of the protruding side portion may be 5 mm or more and may be 0.20 times or less the radius of curvature of the circle of curvature of the arcuate side portion.

[0018] The reinforcing member according to the present invention further comprises: a protrusion portion is formed on an end portion of the second side portion on the side of the first side portion, the protrusion portion extending outside the circle of curvature of the arc-shaped side portion, the protruding portion has a protruding side portion along a tangent to a second circle of curvature whose center overlaps with the circle of curvature of the arc-shaped side portion, The length of a side of the protruding side portion may be 5 mm or more and may be 0.20 times or less the radius of curvature of the circle of curvature of the arcuate side portion.

[0019] The reinforcing member according to the present invention further comprises: a protrusion portion is formed on an end portion of the second side portion on the side of the first side portion, the protrusion portion extending outside the circle of curvature of the arc-shaped side portion, the protrusion has a protrusion side portion along a fourth circle of curvature whose center overlaps with the center of the through hole, The length of a side of the protruding side portion may be 5 mm or more and may be 0.20 times or less the radius of curvature of the circle of curvature of the arcuate side portion.

[0020] The reinforcing member according to the present invention further comprises: a protrusion portion is formed on an end portion of the second side portion on the side of the first side portion, the protrusion portion extending outside the circle of curvature of the arc-shaped side portion, the protrusion has a protrusion side portion along a tangent to a fourth circle of curvature whose center overlaps with the center of the through hole, The length of a side of the protruding side portion may be 5 mm or more and may be 0.20 times or less the radius of curvature of the circle of curvature of the arcuate side portion.

[0021] The reinforcing member according to the present invention further comprises: The radius of curvature of the arcuate side portion may be 0.55 to 1.25 times the distance between the pair of first side portions.

[0022] In order to achieve the above object, the reinforcement structure according to the present invention comprises: The reinforcing member described above; A structural material having a flange portion, a web portion, and a web through hole formed in the web portion, The reinforcing member is With the through hole and the web through hole overlapping, The arcuate side portion is welded to the web portion, The first side portion is not welded to the web portion. Effect of the Invention

[0023] According to the present invention, a reinforcing member and a reinforcing structure having high strength and low cost can be provided. [Brief description of the drawings]

[0024] [Figure 1] FIG. 2 is a perspective view of a reinforcing member according to the embodiment. [Diagram 2] FIG. 2 is a front view of a reinforcing member according to the embodiment. [Diagram 3] FIG. 2 is a perspective view of a reinforcing structure according to the present embodiment. [Figure 4] FIG. 4 is a front view with auxiliary lines etc. added to explain the shape of the reinforcing member according to the embodiment. [Diagram 5] 13 is an enlarged front view of the vicinity of the end portion of the second side portion on the first side portion side. FIG. [Figure 6] FIG. 13 is a perspective view of a reinforcing member according to another embodiment. [Figure 7] FIG. 13 is a perspective view of a reinforcing member according to another embodiment. [Figure 8] FIG. 13 is a front view of a reinforcing member according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] A reinforcing member and a reinforcing structure according to an embodiment of the present invention will be described with reference to the drawings.

[0026] Fig. 1 and Fig. 2 show a reinforcing member 100 according to this embodiment. Fig. 1 shows a perspective view of the reinforcing member 100. Fig. 2 shows a front view of the reinforcing member 100. Fig. 3 shows a perspective view of a reinforcing structure 200 according to this embodiment. Fig. 4 shows the front view of the reinforcing member 100 with auxiliary lines and the like added to define the shape of each part.

[0027] First, an overview of the reinforcing member 100 and the reinforcing structure 200 according to the embodiment will be described.

[0028] 1 and 2, the reinforcing member 100 includes a plate-like main body 1 having a circular through hole 10 perpendicular to the plate surface. The main body 1 has a pair of first sides 2, 2 that face each other across the through hole 10, and a pair of second sides 4, 4 that extend in a direction intersecting the first sides 2, 2 and face each other across the through hole 10. The second sides 4, 4 have arc-shaped side portions 41, 41 that are convex on the radially outer side of the through hole 10, and the radius of curvature of the arc-shaped side portions 41, 41 is 0.80 to 1.50 times the diameter d of the through hole 10 (see FIG. 4).

[0029] As shown in Figure 3, the reinforcing structure 200 of this embodiment comprises a reinforcing member 100, and a structural material 9 having flange portions 91, 91, a web portion 92, and a web through hole 90 formed in the web portion 92, and the reinforcing member 100 has arc-shaped side portions 41, 41 welded to the web portion 92 with the through hole 10 and the web through hole 90 overlapping, and the first side portions 2, 2 are not welded to the web portion 92.

[0030] By combining the reinforcing member 100 with a structural material 9 having a web through hole 90 formed in the web portion 92, a low-cost, high-strength reinforcing structure 200 can be constructed for the portion of the structural material 9 where the web through hole 90 is located.

[0031] The reinforcing member 100 and the reinforcing structure 200 will be described in detail below.

[0032] As shown in Fig. 3, the reinforcing member 100 is a member that reinforces a portion of a structural material 9 having a web through hole 90 formed in a web portion 92 around the web through hole 90. The structural material 9 and the reinforcing member 100 are made of metal such as steel. As shown in Figs. 1 and 2, the reinforcing member 100 includes a plate-shaped main body 1 having a through hole 10 formed therein.

[0033] 3, in the reinforcement structure 200, the reinforcement member 100 is arranged in a state in which the center G (see FIG. 2) of the through hole 10 overlaps with the web through hole 90. Also, in the reinforcement structure 200, the reinforcement member 100 is arranged with the first side portions 2, 2 aligned with the flange portions 91, 91. FIG. 3 shows a case in which the reinforcement member 100 is installed on only one side of the web portion 92.

[0034] In the reinforcement structure 200, the diameter d of the through hole 10 (see FIG. 4) and the inner diameter of the web through hole 90 are approximately the same. The inner diameter of the web through hole 90 is, for example, 0.90 to 1.10 times the diameter d of the through hole 10. In other words, in the reinforcement structure 200, a reinforcement member 100 is selected that has a diameter d that corresponds to the inner diameter of the web through hole 90 to be reinforced.

[0035] In the reinforcement structure 200, the reinforcement member 100 has the arc-shaped side portions 41, 41 welded to the web portion 92. The arc-shaped side portions 41 are welded to the web portion 92 by fillet welding. In the reinforcement structure 200, the first side portions 2, 2 do not need to be welded. As described below, the reinforcement member 100 can construct a high-strength reinforcement structure 200 by welding the arc-shaped side portions 41, 41 to the web portion 92, so that the reinforcement structure 200 can be constructed at low cost. In addition, the first side portions 2, 2 are close to the flange portions 91, 91, and it is difficult for a welding worker to insert a welding rod, so welding is difficult. However, in this embodiment, the first side portions 2, 2 do not need to be welded, and only the arc-shaped side portions 41, 41, which are easy to weld, need to be welded, so that a reinforcement structure 200 that ensures welding quality can be provided. Furthermore, in order to weld the first side portions 2,2, space is required for an operator to insert a welding rod, but in this embodiment, the first side portions 2,2 are not welded and such space is not required, so the first side portions 2,2 can be installed closer to the flange portions 91,91, thereby improving the design freedom of the equipment piping to be installed inside the web through hole 90.

[0036] As described above, the diameter d of the through hole 10 of the reinforcing member 100 and the inner diameter of the web through hole 90 do not necessarily have to be the same. When the diameter d of the through hole 10 and the inner diameter of the web through hole 90 are not the same, the peripheral portion of the through hole 10 and the peripheral portion of the web through hole 90 may be welded. This makes it possible to suppress deformation of the unwelded first side portions 2, 2. When the peripheral portion of the through hole 10 and the peripheral portion of the web through hole 90 are not welded, in order to increase the diameter of the equipment piping provided inside the web through hole diameter and to increase the strength of the reinforcing structure 200, it is preferable that the diameter d of the through hole 10 and the inner diameter of the web through hole 90 are the same.

[0037] The main body 1 is made of, for example, metal. The main body 1 is plate-shaped. As described above, the main body 1 has the through hole 10, the first side portion 2,2, and the second side portion 4,4 including the arc-shaped side portion 41,41. In addition to the through hole 10, the first side portion 2,2, and the second side portion 4,4, the main body 1 may further have arc-shaped step surface portions 3,3,3,3 arranged between the first side portion 2,2 and the arc-shaped side portion 41,41, protrusion portions 5,5,5,5 formed at both ends of the second side portion 4,4 on the first side portion 2,2 side, and a thick portion 12 that is annular in front view and formed on one surface of the main body 1 along the outer periphery of the through hole 10.

[0038] In the following description, the surface of the main body 1 on which the thick-walled portion 12 is formed is referred to as the upper surface, and the opposite surface is referred to as the lower surface, and the position on the upper surface side of the main body 1 is referred to as the upper surface side, and the position on the lower surface side is referred to as the lower surface side. In this embodiment, the front view refers to a viewpoint in which the upper surface of the main body 1 is viewed from the upper surface side along the axis of the center G of the through hole 10. In addition, in the following description, the same direction as the outer side or inner side in the radial direction of the through hole 10 may be simply referred to as the radial outer side or the radial inner side. In addition, the same direction as the circumferential direction of the through hole 10 may be simply referred to as the circumferential direction.

[0039] 2 and 4, the main body 1 has a shape that is point-symmetrical with respect to the center G of the through hole 10 in a front view. In the main body 1, first side portions 2, 2 and second side portions 4, 4 are arranged in the circumferential direction in the following order: first side portion 2, second side portion 4, first side portion 2, and second side portion 4.

[0040] As described above, the main body 1 has a shape that is point-symmetrical with respect to the center G in a front view. Therefore, in the following description, the description of one first side portion 2, second side portion 4, arc-shaped stepped surface portion 3, and protrusion portion 5 is the same as that of the other first side portion 2, second side portion 4, arc-shaped stepped surface portion 3, and protrusion portion 5 in point symmetry, so that the description will be omitted and these will be distinguished as necessary.

[0041] As shown in FIG. 2, the first side portion 2 is a side portion of the plate-shaped main body portion 1. In this embodiment, the first side portion 2 is formed in a straight line. By making the first side portions 2, 2 straight, when constructing a reinforcing structure 200 as shown in FIG. 3, the position of the reinforcing member 100 can be easily adjusted by arranging the first side portions 2, 2 of the reinforcing member 100 along the flange portions 91, 91 of the structural material 9. For example, the mounting position of the reinforcing member can be easily determined by adjusting the position so that the distance between the first side portions 2, 2 and the flange portions 91, 91 is equal. Also, as shown in FIG. 2, the pair of first side portions 2, 2 are parallel. The shortest distance Dy (see FIG. 4) among the distances between the ends of the first side portions 2, 2 may be, for example, 1.20 times or more and 1.50 times or less than the diameter d of the through hole 10. Note that in this embodiment, the distance Dy is the distance between the first side portions 2, 2. By setting the distance Dy within this range, the outer peripheral portion of the through hole 10 is reinforced while ensuring design freedom for the equipment piping to be installed inside the web through hole 90, thereby improving the strength of the reinforcing member 100 and the reinforcing structure 200 (see Figure 3).

[0042] In this embodiment, the distance between the first sides 2, 2 and the center G of the through hole 10 is the same. The outer peripheral surface of the first side 2 may be perpendicular to the plate surface of the main body 1 (see FIG. 1).

[0043] The second side portion 4 is a side portion of the main body portion 1 separate from the first side portion 2. The second side portion 4 extends in a direction intersecting with the first side portion 2. The second side portion 4 is convex radially outward. The pair of second side portions 4, 4 are positioned such that the inner sides of the arc-shaped shapes of the arc-shaped side portions 41, 41 face each other across the through hole 10. The pair of second side portions 4, 4 are line-symmetrical with respect to a virtual line L1 that passes through the center G and is perpendicular to the first side portions 2, 2. The outer peripheral surface of the second side portion 4 may be perpendicular to the plate surface of the main body portion 1 (see FIG. 1).

[0044] 4, the arc-shaped side portion 41 has an arc shape along a circle of curvature C1 that is perpendicular to the virtual line L1 and has a center G1 located on a virtual line L2 that overlaps with the center G. By forming the arc-shaped side portion 41 in an arc shape, the length of the joint of the arc-shaped side portion 41 that is welded to the web portion 92 (see FIG. 3) can be increased, and the strength of the reinforcement structure 200 can be increased.

[0045] The radius of curvature R1 of the circle of curvature C1 is 0.80 to 1.50 times the diameter d of the through hole 10. By setting the radius of curvature R1 of the circle of curvature C1 for the arc-shaped side portion 41 within the above range, the reinforcement efficiency per weight of the metal material of the reinforcement member 100 can be improved. If the reinforcement efficiency of the reinforcement member 100 is improved, the strength of the reinforcement structure 200 (see FIG. 3) is also improved. Note that the reinforcement efficiency is evaluated as high when the weight of the metal material of the reinforcement member 100 in the reinforcement structure 200 is smaller and the strength of the portion of the structural material 9 where the web through hole 90 is arranged when the reinforcement member 100 is attached by welding is improved.

[0046] The radius of curvature R1 of the arc-shaped side portion 41 and the reinforcing efficiency are described in detail below. In the reinforcing structure 200 shown in Fig. 3, a shear force and a bending moment act in combination. In the case where the shear force acts more predominantly than the bending moment, if the second side portion 4 is partially welded to the web portion 92 at the arc-shaped side portion 41, a reaction force against the shear force generated in the reinforcing member 100 and the bending moment generated in the non-welded section of the reinforcing member 100 occurs in the welded portion of the arc-shaped side portion 41. When the radius of curvature R1 (see Fig. 4) of the welded portion of the arc-shaped side portion 41 is large, the region that resists the reaction force of the bending moment generated in the non-welded section of the reinforcing member 100 becomes large. When the radius of curvature R1 of the welded portion of the arc-shaped side portion 41 is small, the region that resists the reaction force of the shear force generated in the reinforcing member 100 becomes large. If the radius of curvature R1 is between 0.80 and 1.50 times the diameter d of the through hole 10, then a proper balance will be achieved between the area that resists the reaction force of the bending moment generated in the unwelded sections of the reinforcing member 100 and the area that resists the reaction force of the shear force generated in the reinforcing member 100, and the reinforcing member 100 will be able to resist both the reaction force of the bending moment and the reaction force of the shear force, thereby increasing the reinforcing efficiency per weight of the metal material of the reinforcing member 100.

[0047] The radius of curvature R1 of the circle of curvature C1 shown in Fig. 4 is preferably 0.80 times or more and 1.10 times or less of the diameter d when the distance Dx between the positions where the second side portions 4, 4 intersect with the virtual line L2 between the second side portions 4, 4 is equal to the distance Dy or when the distance Dx is smaller than the distance Dy. This increases the reinforcing efficiency. In this embodiment, the distance Dx is the width of the reinforcing member 100 in the direction along the first side portion 2.

[0048] When the distance Dx is equal to the distance Dy or is smaller than the distance Dy, and further when the diameter d is 100 mm or more and 300 mm or less, or the ratio of the diameter d to the beam depth of the structural material 9 is 0.50 or less, when multiple web through holes 90 (see Figure 4) are provided adjacent to each other in the structural material 9 (see Figure 4), the spacing between the through holes 10 (the center-to-center distance between the through holes 10) of the reinforcing member 100 arranged corresponding to each of these adjacent web through holes 90 can be made smaller, thereby improving the design freedom of the equipment piping to be provided inside the web through hole 90, which is even more preferable.

[0049] When the distance Dx is greater than the distance Dy, and the diameter d is 200 mm or more and 700 mm or less, or the ratio of the diameter d to the beam depth of the structural member 9 is greater than 0.50 and less than 2 / 3, the radius of curvature R1 is preferably greater than 1.10 times and less than 1.50 times the diameter d. This increases the reinforcing efficiency.

[0050] In FIG. 4, the position where the circle of curvature C1 intersects with the first side portion 2 or the extension line of the first side portion 2 is shown as an intersection point P. The reinforcing member 100 resists a shear force generated in the reinforcing member 100 in a direction along the imaginary line L4 passing through the intersection point P on one side of the first side portion 2 and the intersection point P on the other side of the first side portion 2. Therefore, when the imaginary line L4 overlaps with the tangent line of the through hole 10, the most resisting cross section becomes large, and the reinforcing efficiency can be improved. When the imaginary line L4 is located radially outward from the tangent line of the through hole 10, the weight of the metal material of the reinforcing member 100 increases according to the cross-sectional area of ​​the cross section along the imaginary line L4, while the cross-sectional area resisting this shear force does not become larger than when the imaginary line L4 overlaps with the tangent line of the through hole 10, so that an improvement in the reinforcing efficiency cannot be expected. In this embodiment, the case where the virtual line L4 overlaps with the tangent line of the through hole 10 refers to the case where the distance b described later is half the distance Dy. Note that Fig. 4 illustrates the case where the virtual line L4 does not overlap with the tangent line of the through hole 10.

[0051] The relationship between the radius of curvature R1 of the arc-shaped side portion 41 and the distance Dy, and the reinforcement efficiency, are described in detail below. A shear force and a bending moment act in combination on the reinforcement structure 200 shown in Fig. 3, but when the bending moment acts more predominantly than the shear force, if the second side portion 4 is partially welded to the web portion 92 at the arc-shaped side portion 41, a reaction force against the bending moment acting in the reinforcement member 100 is generated at the welded portion of the arc-shaped side portion 41.

[0052] As the radius of curvature R1 (see Figure 4) of the weld at the arc-shaped edge portion 41 increases, the weld length that resists the reaction force of the bending moment of the reinforcing member 100 becomes longer, but the angle of the weld that resists the reaction force with respect to the axial direction (extension direction) of the structural material 9 becomes larger, resulting in a state similar to that of a side fillet weld, and the expected fracture cross-sectional area of ​​the weld becomes smaller.

[0053] When the radius of curvature R1 of the welded portion of the arc-shaped side portion 41 is smaller, the weld length resisting the reaction force of the bending moment of the reinforcing member 100 becomes shorter, but the angle of the welded portion resisting the reaction force with respect to the material axis direction of the structural material 9 becomes smaller, becoming closer to a front fillet weld, and the assumed fracture cross-sectional area of ​​the welded portion becomes larger. The bending moment generated in the reinforcing member 100 correlates with the distance Dy, but when the radius of curvature R1 of the curvature circle C1 is set to be 0.55 to 1.25 times the distance Dy in relation to the distance Dy, the resistance of the welded portion against the reaction force of the bending moment of the reinforcing member 100 becomes appropriate, thereby improving the reinforcing efficiency per weight of the metal material of the reinforcing member 100 and ensuring the required weld length.

[0054] Furthermore, by setting the difference between the distance Dy and the diameter d of the through hole 10 of the reinforcing member 100 (the cross section of the reinforcing member 100 passing through the virtual line L1) to be 0.15 to 0.35 times the radius of curvature R1, the resistance of the welded joint against the reaction force of the bending moment of these reinforcing members 100 becomes appropriate, thereby improving the reinforcing efficiency per weight of the metal material of the reinforcing member 100 and ensuring the required weld length.

[0055] When the distance Dx is equal to the distance Dy or when the distance Dx is smaller than the distance Dy, the radius of curvature R1 is preferably 0.55 to 0.77 times the distance Dy. In this case, it is even more preferable that the diameter d is 100 mm to 300 mm, or the ratio of the diameter d to the beam depth of the structural material 9 is 0.50 or less, since the interval between the through holes 10 of the reinforcing member 100 provided corresponding to the adjacent web through holes 90 (see FIG. 4) can be made smaller, and the design freedom of the facility piping provided inside the web through holes 90 can be improved.

[0056] When the distance Dx is greater than the distance Dy, it is preferable that the radius of curvature R1 is more than 0.77 times and not more than 1.25 times the distance Dy. Furthermore, it is more preferable that the diameter d is 200 mm or more and 700 mm or less, or the ratio of the diameter d to the beam depth of the structural material 9 is more than 0.50 and not more than 2 / 3, because a higher reinforcing effect can be provided.

[0057] The distance a between the center G1 of the circle of curvature C1 and the center G of the through hole 10 is preferably 0.20 to 0.85 times the diameter d of the through hole 10. This can improve the reinforcing efficiency per weight of the metal material of the reinforcing member 100.

[0058] When the distance Dx is equal to the distance Dy or when the distance Dx is smaller than the distance Dy, the distance a is preferably 0.20 to 0.35 times the diameter d. In this case, it is even more preferable that the diameter d is 100 mm to 300 mm, or the ratio of the diameter d to the beam depth of the structural material 9 is 0.50 or less, since the interval between the through holes 10 of the reinforcing member 100 provided corresponding to the adjacent web through holes 90 (see FIG. 4) can be made smaller, and the design freedom of the facility piping provided inside the web through holes 90 can be improved.

[0059] When the distance Dx is greater than the distance Dy, the distance a is preferably greater than 0.35 and less than 0.85 times the diameter d. In this case, it is even more preferable that the diameter d is greater than 200 mm and less than 700 mm, or the ratio of the diameter d to the beam depth of the structural material 9 is greater than 0.50 and less than 2 / 3, since this provides a higher reinforcing effect. This can improve the reinforcing efficiency.

[0060] Moreover, the distance a is preferably 0.15 to 0.70 times the distance Dx.

[0061] In particular, when the distance Dx is equal to the distance Dy or when the distance Dx is smaller than the distance Dy, the distance a is preferably 0.15 to 0.25 times the distance Dx. In this case, it is even more preferable that the diameter d is 100 mm to 400 mm, or the ratio of the diameter d to the beam depth of the structural material 9 is 0.50 or less, since the interval between the through holes 10 of the reinforcing member 100 provided corresponding to the adjacent web through holes 90 (see FIG. 4) can be made smaller, and the design freedom of the facility piping provided inside the web through holes 90 can be improved.

[0062] Furthermore, when the distance Dx is greater than the distance Dy, the distance a is preferably greater than 0.25 and less than 0.50 times the distance Dx. In this case, it is even more preferable that the diameter d is greater than 200 mm and less than 700 mm, or the ratio of the diameter d to the beam depth of the structural material 9 is greater than 0.50 and less than 2 / 3, since this provides a higher reinforcing effect.

[0063] The distance Dx may be, for example, 1.20 to 1.50 times the diameter d of the through hole 10. The distance Dx is preferably 1.00 to 1.15 times the distance Dy. This allows a better balance between the strength of the reinforcing structure 200 (see FIG. 3) and the reinforcing efficiency per weight of the metal material of the reinforcing member 100.

[0064] The angle θ between the imaginary line L3 overlapping the center G and the intersection point P and the imaginary line L1 in the front view is preferably 25 degrees or more and 45 degrees or less, and more preferably 29 degrees or more and 40 degrees or less.

[0065] When the distance Dx is equal to the distance Dy or when the distance Dx is smaller than the distance Dy, the angle θ is preferably 25 degrees or more and 35 degrees or less. In this case, it is further preferable that the diameter d is 100 mm or more and 300 mm or less, or the ratio of the diameter d to the beam depth of the structural material 9 is 0.50 or less, because the interval between the through holes 10 of the reinforcing member 100 provided corresponding to the adjacent web through holes 90 (see FIG. 4) can be made smaller, and the design freedom of the facility piping provided inside the web through hole 90 can be improved.

[0066] When the distance Dx is greater than the distance Dy, the angle θ is preferably greater than 35 degrees and equal to or less than 45 degrees. In this case, it is even more preferable that the diameter d is greater than 200 mm and equal to or less than 700 mm, or the ratio of the diameter d to the beam depth of the structural material 9 is greater than 0.50 and equal to or less than 2 / 3, since this provides a higher reinforcing effect. This can improve the reinforcing efficiency per weight of the metal material of the reinforcing member 100.

[0067] It is preferable that the distance b between the end of the first side portion 2 and the inner circumference of the through hole 10 in the direction along the perpendicular to the first side portion 2, i.e., the distance b between the intersection point Q where a virtual line L4 that passes through the intersection point P and is perpendicular to the first side portion 2 intersects with the circumference of the through hole 10, is 0.20 to 0.55 times the radius of curvature R1 of the circle of curvature C1 of the arc-shaped side portion 41.

[0068] In particular, when the distance Dx is equal to the distance Dy or when the distance Dx is smaller than the distance Dy, it is preferable that the distance be 0.20 to 0.40 times the radius of curvature R1 of the circle of curvature C1 of the arcuate side portion 41. In this case, it is even more preferable that the diameter d is 100 mm to 300 mm, or the ratio of the diameter d to the beam depth of the structural material 9 is 0.50 or less, since the interval between the through holes 10 of the reinforcing member 100 provided corresponding to adjacent web through holes 90 (see FIG. 4) can be made smaller and the design freedom of the facility piping provided inside the web through hole 90 can be improved.

[0069] Furthermore, when the distance Dx is greater than the distance Dy, the distance b is preferably greater than 0.40 and less than 0.55 times the radius of curvature R1 of the circle of curvature C1 of the arcuate side portion 41, and further preferably greater than 200 mm and less than 700 mm, or greater than 0.50 and less than 2 / 3, since a higher reinforcing effect can be provided. This improves the reinforcing efficiency per weight of the metal material of the reinforcing member 100.

[0070] In addition, the distance between the first side portion 2 and the intersection point between the imaginary line L3 and the inner periphery of the through hole 10 in the direction along the perpendicular to the first side portion 2 is preferably 0.30 to 0.60 times the diameter d of the through hole 10.

[0071] In particular, when the distance Dx is equal to the distance Dy or when the distance Dx is smaller than the distance Dy, it is preferable that the distance be 0.30 to 0.46 times the diameter d. In this case, it is even more preferable that the diameter d is 100 mm to 300 mm, or the ratio of the diameter d to the beam depth of the structural material 9 is 0.50 or less, since the interval between the through holes 10 of the reinforcing member 100 provided corresponding to the adjacent web through holes 90 (see FIG. 4) can be made smaller, and the design freedom of the facility piping provided inside the web through holes 90 can be improved.

[0072] When the distance Dx is greater than the distance Dy, it is preferable that the distance Dx is greater than 0.46 and less than 0.60 times the diameter d. In this case, it is even more preferable that the diameter d is greater than 200 mm and less than 700 mm, or the ratio of the diameter d to the beam depth of the structural material 9 is greater than 0.50 and less than 2 / 3, since this provides a higher reinforcing effect. This can improve the reinforcing efficiency per weight of the metal material of the reinforcing member 100.

[0073] 2 and 4, in this embodiment, the thick-walled portion 12 is formed along the through hole 10. The thick-walled portion 12 is a portion of the main body 1 that is thicker than the plate portion 11 on the outer side of the thick-walled portion 12.

[0074] The center of the ring of the thick-walled portion 12 overlaps with the center G of the through hole 10. The inner diameter of the thick-walled portion 12 may be the same as the diameter d of the through hole 10 (see FIG. 4), and the inner periphery of the thick-walled portion 12 may be circular in a front view. This reinforces the outer periphery of the through hole 10 of the reinforcing member 100. This makes it possible to improve the reinforcing efficiency per weight of the metal material of the reinforcing member 100.

[0075] The outer periphery of thick-walled portion 12 may be located radially inward from second side portion 4. The outer periphery of thick-walled portion 12 may have a circular shape in front view, and may be located radially inward from first side portion 2. The maximum outer diameter of thick-walled portion 12 may be, for example, 1.05 to 1.50 times the diameter d of through hole 10.

[0076] In particular, when the distance Dx is equal to the distance Dy or when the distance Dx is smaller than the distance Dy, the maximum outer diameter of the thick-walled portion 12 is preferably 1.05 to 1.30 times the diameter d of the through hole 10.

[0077] Furthermore, when the distance Dx is greater than the distance Dy, the maximum outer diameter of the thick-walled portion 12 is preferably 1.25 to 1.50 times the diameter d of the through hole 10. When the outer diameter of the thick-walled portion 12 is in this range, the outer periphery of the through hole 10 is appropriately reinforced.

[0078] Furthermore, the maximum outer diameter of the thick-walled portion 12 may be, for example, 1.80 to 6.00 times the aforementioned distance b. When the outer diameter of the thick-walled portion 12 is in this range, the outer periphery of the through hole 10 is appropriately reinforced.

[0079] In particular, when the distance Dx is equal to the distance Dy or when the distance Dx is smaller than the distance Dy, the maximum outer diameter of the thick-walled portion 12 is preferably 3.00 to 6.00 times the distance b. When the outer diameter of the thick-walled portion 12 is in this range, the outer peripheral portion of the through hole 10 is further appropriately reinforced.

[0080] Furthermore, when the distance Dx is greater than the distance Dy, the maximum outer diameter of the thick-walled portion 12 is preferably 1.80 times or more and less than 3.00 times the distance b. When the outer diameter of the thick-walled portion 12 is in this range, the outer peripheral portion of the through hole 10 is further appropriately reinforced.

[0081] The thickness of the thick-walled portion 12 is, for example, 1.02 times or more and 1.30 times or less the thickness of the plate portion 11. When the main body portion 1 has the thick-walled portion 12 of such a thickness, the outer periphery of the through hole 10 is appropriately reinforced.

[0082] Since the main body 1 has a thick thick portion 12 and a plate portion 11 located outside the thick portion 12 and thinner than the thick portion 12, the thickness of the plate portion 11 near the end portion on the first side portion 2 side of the welded portion of the arc-shaped side portion 41, where stress is likely to concentrate, is relatively thinner than the thick portion 12, thereby mitigating the concentration of force applied to the reinforcing structure 200 on the end portion on the first side portion 2 side of the welded portion of the arc-shaped side portion 41, and improving the strength of the reinforcing structure 200 (see Figure 3).

[0083] The outer periphery of the thick portion 12 may partially coincide with the outer periphery of the first side portion 2 and the second side portion 4. In this embodiment, the outer periphery of the thick portion 12 is located in an inner region of the plate surface of the main body portion 1 than the first side portion 2 and the second side portion 4.

[0084] Fig. 5 shows an enlarged front view of the vicinity of the end portion of the second side portion 4 on the first side portion 2 side. As shown in Figs. 4 and 5, a protrusion 5 extending outside the circle of curvature C1 of the arc-shaped side portion 41 may be formed on the end portion of the second side portion 4 on the first side portion 2 side, i.e., the end portion in the extension direction of the arc of the second side portion 4.

[0085] By forming the protrusions 5, the positions of both ends of the arc-shaped side portion 41 are visually indicated to the welding operator, and they serve as markers to inform the welding operator of the range to be welded (the range of the arc-shaped side portion 41 in this embodiment). Similarly, they also serve as markers for the inspector who performs the post-welding inspection, making it easier to perform a visual inspection of the welding of the arc-shaped side portion 41. In other words, by forming the protrusions 5, the welding range can be clearly indicated, making the welding work and its visual inspection easy and reliable.

[0086] As shown in Fig. 3, in this embodiment, the arc-shaped side portion 41 of the second side portion 4 is welded to the web portion 92. In this embodiment, when a protrusion 5 is formed, the protrusion 5 is a mark and is not subject to welding. That is, in the reinforcing structure 200 according to this embodiment, the arc-shaped side portion 41 of the second side portion 4 is welded to the web portion 92, and the radially outer peripheral portion of the protrusion 5 is not welded to the web portion 92. It is permissible for the peripheral portion of the protrusion 5 adjacent to the arc-shaped side portion 41 to be welded together with the arc-shaped side portion 41.

[0087] If welding is performed up to the end of the second side portion 4, a cross-sectional defect due to burn-through occurs in the reinforcing member 100 at the weld end (end of the second side portion 4), which may become the starting point of fracture of the reinforcing structure 200. However, by not welding the end of the second side portion 4 (projection portion 5), burn-through at the end of the second side portion 4 can be avoided, and the end of the second side portion 4 can be prevented from becoming the starting point of fracture of the reinforcing structure 200. Unlike welding the entire circumference of the reinforcing member 100, when partial welding is performed, stress concentration occurs at the end of the weld. When only the second side portion 4 is welded, that is, when welding is performed such that the end of the weld becomes the end of the second side portion 4, cross-sectional defect due to burn-through is likely to occur in the reinforcing member 100 at the start and end of the weld, and this point becomes the starting point of weld fracture, leading to brittle fracture. However, by welding only the arc-shaped side portion 41 and not welding the end of the second side portion 4 (projection portion 5), weld fracture may be avoided.

[0088] Furthermore, by not welding the protrusion 5, it is possible to avoid the occurrence of cross-sectional defects in the reinforcing member 100 due to welding as exemplified above, thereby preventing the hassle of having to redo the work after the weld fails a visual inspection.

[0089] The protrusion 5 extends in a direction parallel to the extension direction of the first side portion 2. The protrusion 5 does not extend in a direction perpendicular to the extension direction of the first side portion 2.

[0090] The protruding portion 5 may have a protruding arc-shaped side portion 51 (an example of a protruding side portion) that is a side portion having an arc shape along a curvature circle C2 (an example of a second curvature circle) that intersects with the first side portion 2 and overlaps with the center G1 (see FIG. 4) of the curvature circle C1 along which the arc-shaped side portion 41 follows. In other words, the protruding arc-shaped side portion 51 is a side portion that extends along the curvature circle C1 along which the arc-shaped side portion 41 follows.

[0091] The length of the side (arc) of the protruding arc-shaped side portion 51 is 5 mm or more and 0.20 times or less of the radius of curvature R1, preferably 5 mm or more and 0.15 times or less of the radius of curvature R1. Such a length is convenient for cutting out the material of the reinforcing member 100, and ensures the length of the arc-shaped side portion 41, i.e., the welding length at the second side portion 4, to adequately exert the reinforcing effect. Also, it is possible to prevent the protruding portion 5 from melting away during welding.

[0092] As shown in Fig. 4, the radius of curvature R2 of the circle of curvature C2 is larger than the radius of curvature R1 of the circle of curvature C1. The radius of curvature R2 of the circle of curvature C2 is preferably 2 mm to 15 mm, more preferably 2 mm to 10 mm, larger than the radius of curvature R1 of the circle of curvature C1. This makes the protrusion 5 easy to visually recognize as the above-mentioned mark. In addition, the protrusion 5 is easy to process when cut out.

[0093] 2, 5, etc., the second side portion 4 may have an arcuate step surface portion 3 extending from the upper surface side toward the lower surface side (toward the inside in the thickness direction of the plate portion 11) between the first side portion 2 and the arcuate side portion 41. In this embodiment, the arcuate step surface portion 3 is formed adjacent to the arcuate side portion 41 at the end portion of the second side portion 4 on the first side portion 2 side.

[0094] In this embodiment, the arcuate step surface portion 3 is formed in a position in the same range in the circumferential direction as the range in which the protrusion portion 5 is formed on the second side portion 4.

[0095] As shown in Figs. 4 and 5, the arc-shaped step surface portion 3 is an arc-shaped surface that follows the circle of curvature C3 (third circle of curvature) in a front view. The arc-shaped step surface portion 3 is an arc-shaped surface that is convex radially outward of the through hole 10 (see Fig. 2). The arc-shaped step surface portion 3 may be perpendicular to the plate surface of the plate portion 11 in the main body portion 1 (see Fig. 1). The center of the circle of curvature C3 overlaps with the center G of the through hole 10. Since the arc-shaped step surface portion 3 follows the circle of curvature C3, processing by a cutting device such as a lathe when forming the arc-shaped step surface portion 3 during manufacturing of the reinforcing member 100 becomes easier.

[0096] The radius of curvature R3 of the circle of curvature C3 is larger than half the distance Dx, as shown in Fig. 4. The radius of curvature R3 of the circle of curvature C3 is preferably smaller than that when the circle of curvature C3 overlaps with the intersection point P. Fig. 4 shows a case where the arc-shaped step surface portion 3 is disposed inside the circle of curvature C1 of the arc-shaped side portion 41, but a part or all of the arc-shaped step surface portion 3 may be located outside the circle of curvature C1 of the arc-shaped side portion 41. By disposing the arc-shaped step surface portion 3 in this manner, it is possible to ensure visibility as a mark indicating the weld size while minimizing the reduction in the reinforcing effect due to the reduction in the amount of steel material in the reinforcing member 100.

[0097] As shown in Figs. 4 and 5, the plate thickness of the thin-walled portion 13 (see Fig. 5) of the main body 1 located outside the circle of curvature C3 from the arc-shaped step surface portion 3 is thinner than that of the plate portion 11. In other words, the plate thickness of the thin-walled portion 13 is thinner than that of the arc-shaped side portion 41. The plate thickness of the thin-walled portion 13 may be, for example, 0.20 to 0.80 times the plate thickness of the plate portion 11. By providing such a thin-walled portion 13 near the end portion on the first side portion 2 side of the welded portion of the arc-shaped side portion 41 where stress is likely to concentrate, the thickness of the thin-walled portion 13 becomes relatively thinner than that of the plate portion 11, and the concentration of the force applied to the reinforcing structure 200 on the end portion on the first side portion 2 side of the welded portion of the arc-shaped side portion 41 is mitigated, thereby improving the strength of the reinforcing structure 200 (see Fig. 3).

[0098] 1 and 5, in this embodiment, the plate portion of the protrusion 5 is the thin-walled portion 13. That is, the thickness of the protrusion 5 in the thickness direction of the main body 1 is thinner than that of the arc-shaped side portion 41.

[0099] When the protrusion 5 is formed of the thin-walled portion 13, the thickness of the thin-walled portion 13 is made to correspond to the weld size required when welding the arc-shaped side portion 41. More specifically, for example, if the thickness of the thin-walled portion 13 is made the same as the weld size required when welding the arc-shaped side portion 41, it serves as a mark to inform the welding operator of the weld size required for the arc-shaped side portion 41. It also serves as a mark for the inspector who performs the post-welding inspection, making it easier to visually inspect the welding of the arc-shaped side portion 41.

[0100] When the protrusion 5 is formed of the thin-walled portion 13, if the plate thickness of the thin-walled portion 13 is 0.20 times or more and 0.80 times or less as described above, it is possible to prevent the protrusion 5 from melting and the welding mark from disappearing when the arc-shaped edge portion 41 is welded to the web portion 92 (see Figure 3).

[0101] Furthermore, when the radius of curvature R2 of the circle of curvature C2 of the protrusion 5 is 2 mm or more and 15 mm or less than the radius of curvature R1 of the circle of curvature C1 as shown in Figure 4, it is possible to prevent the protrusion 5 from melting and the welding mark from disappearing when welding the arc-shaped edge portion 41 to the web portion 92 (see Figure 3).

[0102] The reinforcing member 100 shown in FIG. 1 and the like may be manufactured by cutting and milling a sheet of plate-shaped steel material. In this case, if the reinforcing member 100 with a large external shape and the reinforcing member 100 with a small external shape are taken out of a single sheet of material, the weight of the sheet material can be reduced and the reinforcing member 100 can be manufactured efficiently. Specifically, when manufacturing the reinforcing member 100 with a large external shape, a portion to be the through hole 10 is hollowed out from the sheet material by cutting or the like, and the reinforcing member 100 with a small external shape may be formed from a small piece of the sheet material generated by forming the through hole 10. In this case, it is preferable to use SM material or SN material (for example, SM490A, SN490B, SM490YA, etc.) as the material of the reinforcing member 100, but other metal materials can also be used. The reinforcing member 100 may also be manufactured by forging or casting.

[0103] In this manner, a high-strength, low-cost reinforcing member and reinforcing structure can be provided.

[0104] [Another embodiment] (1) In the above embodiment, as shown in Fig. 5 and other figures, a case has been described in which the arc-shaped step surface portion 3 is disposed between the first side portion 2 and the arc-shaped side portion 41 at the second side portion 4. However, the arc-shaped step surface portion 3 is not essential and can be omitted. Fig. 6 shows an example of a reinforcing member 100 in which the arc-shaped step surface portion 3 is not disposed, unlike the case exemplified in the above embodiment. When the arc-shaped step surface portion 3 is not disposed, the thickness of the protrusion portion 5 may be the same as that of the plate portion 11.

[0105] (2) In the above embodiment, as shown in FIG. 5 and the like, the protrusion 5 has a protruding arc-shaped side portion 51, which is an arc-shaped side portion along the circle of curvature C2. However, instead of the protruding arc-shaped side portion 51, the protrusion 5 may have a straight side portion (another example of a protruding side portion) along the tangent to the circle of curvature C2. The length of the straight side portion is 5 mm or more and 50 mm or less, preferably 10 mm or more and 30 mm or less. More specifically, this straight side portion is a side portion that extends along the tangent to the circle of curvature C1 along which the arc-shaped side portion 41 extends (parallel to the tangent to the circle of curvature C1).

[0106] Furthermore, instead of the protruding arc-shaped side portion 51, the protruding portion 5 may have a straight side portion (another example of a protruding side portion) parallel to the tangent of the through hole 10 (the tangent of the circle of curvature (fourth circle of curvature, not shown) whose center overlaps with the center G of the through hole 10), or an arc-shaped side portion (another example of a protruding side portion) along the circle of curvature (fourth circle of curvature) whose center overlaps with the center G of the through hole 10. The length of the side of this side portion is 5 mm or more and 50 mm or less, preferably 10 mm or more and 30 mm or less. This reduces the outermost diameter of the reinforcing member 100, reducing the weight of the plate material and enabling the reinforcing member 100 to be manufactured efficiently.

[0107] (3) In the above embodiment, a protrusion 5 is formed at the end of the second side 4 on the first side 2 side. However, the protrusion 5 is not essential and can be omitted. Fig. 7 shows an example of a reinforcing member 100 in which the arc-shaped step surface portion 3 and the protrusion 5 are not provided, unlike the example in the above embodiment.

[0108] (4) In the above embodiment, the thick-walled portion 12 is formed on one surface of the main body 1 along the outer periphery of the through hole 10 and has an annular shape in a front view. However, providing the thick-walled portion 12 is not essential and can be omitted.

[0109] (5) In the above embodiment, it has been described that the outer periphery of the thick-walled portion 12 may be circular in front view and may be located radially inward of the first side portion 2. However, the positional relationship between the outer periphery of the thick-walled portion 12 and the first side portion 2 is not limited to this. As shown in FIG. 8, a part of the outer periphery of the thick-walled portion 12 may reach the first side portion 2. In other words, a part of the outer periphery of the thick-walled portion 12 may be a part of the first side portion 2, and the outer periphery of the thick-walled portion 12 may be a deformed circular shape in which the part overlapping with the first side portions 2, 2 is deformed (radially inward) of the ring and flattened in front view. In other words, the circumferential portion of the thick-walled portion 12 along the arc-shaped side portion 41 may be a part of a circle (arc-shaped), and the part reaching the first side portion 2 may be a linear circumferential portion.

[0110] 8 illustrates a case in which an imaginary line L4 that passes through the intersection point P and is perpendicular to the first side portion 2 overlaps with a tangent line of the through hole 10 in the reinforcing member 100. In FIG.

[0111] (6) In the above embodiment, the first side portion 2 is linear. However, the first side portion 2 is not limited to being linear. The first side portion 2 may be an arc shape that protrudes radially outward from the through hole 10, as long as the outermost diameter of the reinforcing member 100 in the direction along the imaginary line L1 does not exceed the distance Dx.

[0112] (7) In the above embodiment, the reinforcing member 100 is provided on only one side of the web portion 92. However, the reinforcing member 100 may be attached to both sides of the web portion 92.

[0113] It should be noted that the embodiments disclosed in this specification are merely examples, and the present invention is not limited to these embodiments, and can be modified as appropriate without departing from the scope of the present invention. [Industrial Applicability]

[0114] The present invention is applicable to reinforcing members and reinforcing structures. [Explanation of symbols]

[0115] 1: Main body 10:Through hole 100: Reinforcement member 11: Plate part 12:Thick part 13: Thin section 2: First side 200: Reinforcement structure 3: Arc-shaped step surface 4:Second side 41: Arc-shaped edge 5:Protrusion 51: Protruding arc-shaped edge portion (protruding edge portion) 9: Structural material 90: Web through hole 91: Flange part 92: Web Department C1: Curvature circle C2: Curvature circle (second curvature circle) C3: Curvature circle Dx:Distance Dy: Distance G: Center G1: Center L1: Virtual line L2: Virtual line L3: Virtual line L4: Virtual line P: Intersection Q: Intersection R1: radius of curvature R2: radius of curvature R3: radius of curvature a :Distance b :distance d :Diameter θ: Angle

Claims

1. A plate-shaped main body having a circular through hole perpendicular to a plate surface, The main body portion is A pair of first side portions opposed to each other across the through hole; a pair of second side portions extending in a direction intersecting the first side portion and facing each other across the through hole; The second side portion has an arc-shaped side portion having a convex arc-shaped shape on a radially outer side of the through hole, A reinforcing member in which the radius of curvature of the arc-shaped side portion is 0.80 to 1.50 times the diameter of the through hole.

2. The reinforcing member according to claim 1 , wherein the pair of first side portions are linear.

3. The pair of first side portions are parallel to each other, The reinforcing member according to claim 1 , wherein the pair of second side portions are symmetrical with respect to a virtual line that passes through a center of the through hole and is perpendicular to the first side portion.

4. The reinforcing member according to claim 1, wherein the distance between the end of the first side portion and the periphery of the through hole in a direction along a perpendicular line to the first side portion is 0.20 times or more and 0.55 times or less the radius of curvature of the arc-shaped side portion.

5. 2. The reinforcing member according to claim 1, wherein an angle between a virtual line passing through the center of the through hole and perpendicular to the first side portion and a virtual line passing through the center of the through hole and the intersection where the circle of curvature of the arc-shaped side portion intersects with the first side portion is greater than or equal to 25 degrees and less than or equal to 45 degrees.

6. 2. The reinforcing member according to claim 1, wherein the distance between the center of the circle of curvature of the arc-shaped side portion and the center of the through hole is 0.20 to 0.85 times the diameter of the through hole.

7. a protrusion portion is formed on an end portion of the second side portion on the side of the first side portion, the protrusion portion extending outside the circle of curvature of the arc-shaped side portion, The reinforcing member according to claim 1 , wherein the protrusion extends in a direction parallel to an extension direction of the first side portion.

8. The second side portion further includes an arc-shaped step surface portion disposed between the first side portion and the arc-shaped side portion, The arc-shaped step surface portion has an arc-shaped shape that is convex radially outward of the through hole, The reinforcing member according to claim 1 , wherein a center of the circle of curvature of the arcuate step surface portion overlaps with a center of the through hole.

9. The second side portion further includes an arc-shaped step surface portion disposed between the first side portion and the arc-shaped side portion, a protrusion portion is formed on an end portion of the second side portion on the side of the first side portion, the protrusion portion extending outside the circle of curvature of the arc-shaped side portion, The arc-shaped step surface portion has an arc-shaped shape that is convex radially outward of the through hole, a center of a circle of curvature of the arc-shaped step surface portion overlaps with a center of the through hole, The protrusion extends in a direction along an extension direction of the first side portion, The reinforcing member according to claim 1 , wherein the thickness of the protrusion in the thickness direction of the main body is thinner than that of the arcuate side portion.

10. The main body portion has a thick-walled portion that is thick in a thickness direction of the main body portion along an outer periphery of the through hole, The reinforcing member according to claim 1 , wherein the thick portion is annular in a front view, and a center of the ring overlaps with a center of the through hole.

11. The main body portion has a thick-walled portion that is thick in a thickness direction of the main body portion along an outer periphery of the through hole, The second side portion further includes an arc-shaped step surface portion disposed between the first side portion and the arc-shaped side portion, The thick-walled portion is annular in front view, and a center of the ring overlaps with a center of the through hole, a protrusion portion is formed on an end portion of the second side portion on the side of the first side portion, the protrusion portion extending outside the circle of curvature of the arc-shaped side portion, The arc-shaped step surface portion has an arc-shaped shape that is convex radially outward of the through hole, a center of a circle of curvature of the arc-shaped step surface portion overlaps with a center of the through hole, The protrusion extends in a direction along an extension direction of the first side portion, The reinforcing member according to claim 1 , wherein the thickness of the protrusion in the thickness direction of the main body is thinner than that of the arcuate side portion.

12. a protrusion portion is formed on an end portion of the second side portion on the side of the first side portion, the protrusion portion extending outside the circle of curvature of the arc-shaped side portion, the protruding portion has a protruding side portion along a second circle of curvature whose center overlaps with the center of the circle of curvature of the arc-shaped side portion, 2. The reinforcing member according to claim 1, wherein the length of the side of the protruding side portion is 5 mm or more and is 0.20 times or less the radius of curvature of the circle of curvature of the arcuate side portion.

13. a protrusion portion is formed on an end portion of the second side portion on the side of the first side portion, the protrusion portion extending outside the circle of curvature of the arc-shaped side portion, the protruding portion has a protruding side portion along a tangent to a second circle of curvature whose center overlaps with the center of the circle of curvature of the arc-shaped side portion, 2. The reinforcing member according to claim 1, wherein the length of the side of the protruding side portion is 5 mm or more and is 0.20 times or less the radius of curvature of the circle of curvature of the arcuate side portion.

14. a protrusion portion is formed on an end portion of the second side portion on the side of the first side portion, the protrusion portion extending outside the circle of curvature of the arc-shaped side portion, the protrusion has a protrusion side portion along a fourth circle of curvature whose center overlaps with the center of the through hole, 2. The reinforcing member according to claim 1, wherein the length of the side of the protruding side portion is 5 mm or more and is 0.20 times or less the radius of curvature of the circle of curvature of the arcuate side portion.

15. a protrusion portion is formed on an end portion of the second side portion on the side of the first side portion, the protrusion portion extending outside the circle of curvature of the arc-shaped side portion, the protrusion has a protrusion side portion along a tangent to a fourth circle of curvature whose center overlaps with the center of the through hole, 2. The reinforcing member according to claim 1, wherein the length of the side of the protruding side portion is 5 mm or more and is 0.20 times or less the radius of curvature of the circle of curvature of the arcuate side portion.

16. The reinforcing member according to claim 1 , wherein the radius of curvature of the arcuate side portion is 0.55 to 1.25 times the distance between the pair of first side portions.

17. A reinforcing member according to any one of claims 1 to 16; A structural material having a flange portion, a web portion, and a web through hole formed in the web portion, The reinforcing member is With the through hole and the web through hole overlapping, The arcuate side portion is welded to the web portion, The first side portion is a reinforcement structure that is not welded to the web portion.

Images