Joining materials

Abstract

To provide a joining member capable of strengthening the joint between two structural members and quickly and easily forming a structure having a stable frame that can be repeatedly deformed. [Solution] The joining member is supported by a foundation 51 provided on the structure and comprises an anchor part 1 which is a rod-shaped member, a fixing part 2 which is a structural material different from the foundation 51 and is installed on a column 53 provided on the structure, a connecting base 5 formed on the anchor part 1, a support part 4 which protrudes from the fixing part 2, and a connecting part 3 which extends in a direction intersecting the axial direction of the anchor part 1 and is connected to the connecting base 5 and the support part 4, and one connecting part 3 is restrained in movement relative to one connecting base 5 or support part 4 in two opposite directions parallel to the axial direction of the anchor part 1 by one connecting base 5 or support part 4, and the connecting part 3 can be repeatedly deformed by a force acting on the part whose movement is not restrained.

Description

[Technical field]

[0001] The present invention relates to a joining member. [Background technology]

[0002] The collapse mechanism of wooden structures is gradually being elucidated through past research and earthquake damage analysis, but with the risk of a Tokyo metropolitan area earthquake and a Nankai Trough earthquake increasing, there is a strong demand for further improvement in the earthquake resistance of wooden structures. It has been reported that approximately 30% of wooden houses built to old earthquake resistance standards (before 1981) collapsed in the Kumamoto earthquake, and approximately 19% collapsed in the Noto Peninsula earthquake.

[0003] Wooden structures constructed using conventional post-and-beam construction or frame wall construction (hereafter referred to as "conventional structures") are designed to resist earthquake forces using braces and structural plywood. In an actual earthquake, the braces and structural plywood behave to resist earthquake forces, so when subjected to a certain level of earthquake force, the braces and structural plywood are damaged and lose their resistance. As a result, wooden structures are essentially in a state similar to a frame consisting of only columns and beams. Conventional hold-down hardware and L-shaped and I-shaped plate hardware (hereafter referred to as "plate hardware"), which are simpler than hold-down hardware, are designed as joint members that resist pull-out forces. Therefore, hold-down hardware and plate hardware can hardly resist deformation of the frame in the direction of a compressive force acting on them in the opposite direction to the pull-out force. As a result, excessive deformation occurs in the frame, and it eventually cannot support the axial force and collapses.

[0004] In conventional earthquake-resistant design, a large safety factor is expected by setting the allowable strength of each structure, including braces and structural plywood, at about half of the maximum strength of that structure. However, earthquake motions in recent years have exceeded the assumptions made in earthquake-resistant calculations, and cases of collapse have been reported. Therefore, in wooden structures, even if the braces and structural plywood are damaged by an earthquake or other event and lose their resistance, and the structure essentially becomes one composed only of columns and beams, a joining material is required that maintains the horizontal rigidity of the structure above a certain level and realizes a stable structure that can be repeatedly deformed.

[0005] In addition to conventional structures, wooden structures include rigid frame structures in which beams and columns are rigidly joined (hereinafter referred to as "wooden rigid frame structures"). With a wooden rigid frame structure, earthquake resistance equal to or greater than that of conventional structures can be ensured with a smaller amount of surface material compared to conventional structures. Furthermore, there is a design advantage in that it allows for a high degree of freedom in creating large, bright, open spaces without walls. In a wooden rigid frame structure, metal joints are used to make the joints between the wooden beams and columns rigid. For example, Patent Document 1 discloses a technology for constructing a wooden rigid frame structure using metal joints.

[0006] Unlike wooden frame structures, in conventional structures, the pull-out force acting on columns and beams is calculated individually, and connecting hardware is selected according to the calculated pull-out force. Generally, hold-down hardware is used when the calculated pull-out force is 15kN or more. Hold-down hardware has a hardware body that has a plate material to be installed on the column or beam and a protrusion protruding outward from the plate material. The hardware body is attached to the column or beam by the plate material, and an anchor bolt fixed to the foundation, column, or beam is inserted into the protrusion. A nut is screwed onto the anchor bolt above the protrusion, and when deformation occurs in the frame formed by the structural materials, the top surface of the protrusion comes into contact with the nut integrated with the anchor bolt, thereby resisting the pull-out force acting on the column or beam. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2017-133209 A [Patent Document 2] JP 2005-248529 A [Patent Document 3] JP 2014-55452 A Summary of the Invention [Problem to be solved by the invention]

[0008] As disclosed in Patent Document 1, the metal fittings used in wooden frame structures are attached to the columns by bolts or screws, and metal plates protruding outward from the columns are embedded in the beams and connected by pins. In wooden frame structures, when tensile or compressive force is applied to the joints, stress is concentrated in the wooden material supporting the pin, and the pin sinks into the wooden material, and the sinking of the wooden material precedes the deformation of the pin. Ultimately, the pin destroys the wooden material, and the wooden structure's framework is destroyed by brittleness. In addition, in wooden frame structures, it is necessary to accurately attach special metal fittings to the columns and beams, so that the beams and columns, which are wooden materials, are usually pre-cut and the metal fittings are also attached to the beams and columns in a factory. Furthermore, because special processing is required, there are not many pre-cut factories that can manufacture the columns and beams of wooden frame structures, which is one of the reasons for the increase in costs.

[0009] Furthermore, since the beams and columns are transported with the metal fittings attached at the factory, it is necessary to protect the metal plates of the metal fittings so that the beams, columns, and metal fittings are not damaged. Therefore, compared to beams and columns without metal fittings, the beams and columns of wooden frame structures processed at factories have a larger capacity, which reduces the amount that can be transported and reduces the transportation efficiency. In addition, since wooden materials are easily deformed by temperature and humidity, it is difficult to assemble them at the construction site according to the pre-formed notches and holes for metal fittings, which makes construction difficult and tends to be expensive. For this reason, wooden frame structures are less popular than conventional structures.

[0010] As described above, the hold-down hardware is applied to conventional structures having braces, structural plywood, dampers, etc. The hold-down hardware is a metal fitting for resisting the pulling force acting on columns and beams. Therefore, the hold-down hardware is usually configured so that the nut contacts the protrusion only on the upper surface of the protrusion of the hardware body. Therefore, if the hold-down hardware is installed at the joint between a column and a beam where there are no braces, structural plywood, dampers, etc., when an external force due to an earthquake or the like is input and the frame is deformed, there is a problem that the hold-down hardware can resist the deformation of the frame in the direction in which a tensile force acts on the hold-down hardware, but cannot resist the deformation of the frame in the direction in which a compressive force acts on the hold-down hardware. Here, an example has been described in which the lower end of the anchor bolt is fixed to the foundation of the structural material, the anchor bolt extends upward, and the upper end is connected to the hold-down hardware. If the upper end of the anchor bolt is fixed to the beam of the structural material, the anchor bolt extends downward, and the lower end is connected to the hold-down hardware, the relationship between the upper surface and the lower surface of the protrusion is reversed.

[0011] When an external force such as an earthquake is applied to a frame, plate metal can resist deformation of the frame in the direction in which tension is applied to the plate metal. On the other hand, plate metal cannot resist deformation of the frame in the direction in which compression is applied to the plate metal, because the plate metal will either sink into the foundation or beam, or will prematurely yield in bending.

[0012] Unlike ordinary hold-down hardware, as in Patent Document 2, if a nut installation position is added so that the nut screwed onto the anchor bolt also hits the underside of the protrusion of the hardware body, the hold-down hardware can resist deformation of the frame in the direction in which a compressive force acts. However, when a compressive force acts on the hold-down hardware, the nut on the underside pushes up the underside of the protrusion, and the hardware body undergoes bending deformation at the fixed part with the column and becomes plastic. When the frame deforms in the direction in which a tensile force acts on the hold-down hardware after plasticization, the end of the hardware body in the length direction deforms toward the center of the column, and the hardware body sinks into the column, which is made of wood, destroying the column. When the frame deforms in the direction in which a compressive force acts on the hold-down hardware after plasticization, the end of the hardware body in the length direction deforms toward the anchor bolt. At this time, there is a problem that a rotational moment is generated at the top of the anchor bolt, which increases the deformation of the anchor bolt and at the same time increases the deformation of the frame.

[0013] Also, as in Patent Document 2, by making the nut come into contact with the underside of the protrusion of the hardware body, the hold-down hardware can also bear compressive forces, but the joints between the nuts on the upper side and the nuts on the lower side and the anchor bolt are rigid joints with no deformation capacity. As a result, stress is concentrated at the fixed part between the hardware body and the column, and the column, which is made of wood, may be destroyed. Also, when compressive force actually acts on the anchor bolt, the nuts on the lower side are pressed by the protrusion of the hardware body, and the anchor bolt may buckle. If the anchor bolt buckles due to an earthquake, it will no longer function as a hold-down hardware after the earthquake, and this may cause problems in the continued use of the structure.

[0014] In Patent Document 3, in order to prevent the above-mentioned buckling of the anchor bolt, an unbonded brace is formed by providing a sleeve surrounding the anchor bolt that serves as the core material. In this case, the buckling of the anchor bolt can be prevented, but as in Patent Document 2, the joints between both nuts and the anchor bolt are rigid and have no deformation capacity, so stress is concentrated in the fixed part between the metal body and the column, and there is a risk of the column, which is made of wood, being destroyed. In addition, special parts different from widely used anchor bolts are required, and there is a problem that procuring and installing the parts takes time and effort.

[0015] Furthermore, in Patent Documents 2 and 3, nuts are fixed to the upper and lower surfaces of the protrusions of the hold-down hardware. When actually assembling this configuration, it is necessary to first rotate the nut on the lower side to a predetermined position, then install the hardware body, tighten the nut on the upper side, and finally tighten the nut on the lower side, which means at least two more steps compared to general hold-down hardware, and the number of steps is doubled. Furthermore, the nut on the lower side cannot be tightened with an electric tool, which further reduces construction efficiency. Also, if one of the nuts is overtightened, an excessive constant load acts in the direction that loosens the other nut, so torque management is required to ensure a certain level of quality in on-site work, and construction efficiency is significantly reduced.

[0016] In both the conventional hold-down hardware and the hold-down hardware of Patent Documents 2 and 3, when the hold-down hardware is installed in a rigid frame structure without braces, structural plywood, dampers, etc., the erection of the column changes depending on the tightening of the nut, making it difficult to erect the column vertically. This is because the axial direction of the anchor bolt is vertical, just like the column, and the tightening direction of the nut is also vertical. Even if the erection is confirmed by installing temporary braces, the nut needs to be tightened by hand so that the erection does not change. Therefore, torque cannot be controlled during construction, which not only causes quality variations, but also causes the nut to loosen over time, which may lead to a deterioration in quality.

[0017] The present invention has been made in consideration of the above circumstances, and aims to provide a joining member that can strengthen the joint between two structural materials and quickly and easily form a structure having a stable framework that can be repeatedly deformed. [Means for solving the problem]

[0018] The joining member of the present invention comprises an anchor portion which is a rod-shaped member and is supported by a first structural material provided on a structure, a fixing portion which is installed on a second structural material which is a structural material different from the first structural material and which is provided on the structure, a connecting base formed on the anchor portion, a support portion which protrudes from the fixing portion, and a connecting portion which extends in a direction intersecting the axial direction of the anchor portion and is connected to the connecting base and the support portion, wherein the movement of one of the connecting portions relative to one of the connecting bases or support portions is restrained by one of the connecting bases or support portions in two opposite directions parallel to the axial direction of the anchor portion, and the connecting portion is repeatedly deformable by a force acting on a portion of the connecting portion whose movement is not restrained.

[0019] According to this configuration, the anchor portion, which is a rod-shaped member, is supported by a first structural material provided on the structure, and the fixing portion is installed on a second structural material different from the first structural material and provided on the structure. The connecting base is formed on the anchor portion, and the support portion is provided protruding from the fixing portion. The connecting portion is provided extending in a direction intersecting the axial direction of the anchor portion, and is connected to the connecting base and the support portion. As a result, the connecting base formed on the anchor portion is connected to the support portion provided on the fixing portion via the connecting portion.

[0020] In addition, one connecting part is restricted in movement relative to one connecting base or support part in two mutually opposite directions parallel to the axial direction of the anchor part by one connecting base or support part, whereby one connecting part can resist both tensile and compressive forces acting on the anchor part, and therefore the anchor part can bear not only tensile forces but also compressive forces.

[0021] Furthermore, since the connecting portion can be repeatedly deformed while maintaining a predetermined rigidity due to forces acting on the portion whose movement is not restrained, the deformation performance of the connection portion between the first structural material and the second structural material on the anchor portion side is improved and stabilized.

[0022] In the above invention, a bending yield load or a shear yield load of the connecting portion may be smaller than a buckling load of the anchor portion.

[0023] As a result, in the case where the connecting part is bent, when a compressive force acts on the anchor part, the connecting part will first yield in bending before buckling occurs in the anchor part. Or, in the case where the bending deformation of the connecting part is restrained by the connecting base, when a compressive force acts on the anchor part, the connecting part will first yield in shear before buckling occurs in the anchor part. Therefore, damage to the anchor part due to buckling or brittle destruction can be avoided, and the connecting part maintains a substantially constant rigidity within the elastic range and exhibits stable behavior against repeated loads until bending yield or shear yield. For loads above the bending yield load or shear yield load, the connecting part increases the amount of repeated deformation due to plastic deformation, so that the increase in load becomes gradual and almost reaches a plateau. Therefore, the connecting part can absorb more energy than before yielding. This contributes to improving and stabilizing the deformation performance of the connection part between the first structural member and the second structural member.

[0024] In the above invention, the fixing portion may have a configuration in which bending yield does not occur when a bending yield load or a shear yield load acts on the connecting portion.

[0025] As a result, even if a bending yield load or shear yield load acts on the connecting portion, the fixing portion does not undergo plastic deformation due to bending yield. If the fixing portion were to receive a load equal to or greater than the bending yield load, the fixing portion would become plastic, and the bendable portion of the fixing portion would bend in a direction away from the second structural material, or in a direction toward the second structural material (collectively referred to as a "dog-legged shape" below), which could destroy the second structural material. In contrast, the fixing portion does not undergo plastic deformation and maintains the shape it had when installed on the second structural material (for example, the installation surface of the fixing portion remains parallel to the surface of the second structural material), preventing destruction of the second structural material. In addition, when a bending yield load or shear yield load acts on the connecting portion, the configuration in which the fixed portion does not undergo bending yield is such that (1) the installation position of the support part in the fixed portion is set to the middle part in the longitudinal direction of the fixed portion, and the fixed portion is fixed to the second structural material both above and below the support part, or (2) the stress generated in the fixed portion when the connecting portion is subjected to a yield load is set to be lower than the bending yield load of the fixed portion. Effect of the Invention

[0026] According to the present invention, the joint between two structural members can be strengthened, and a structure having a stable frame that can be repeatedly deformed can be quickly and easily formed. [Brief description of the drawings]

[0027] [Figure 1] FIG. 1 is a perspective view showing a metal joint according to a first embodiment of the present invention. [Diagram 2] FIG. 1 is a front view showing a metal joint according to a first embodiment of the present invention. [Diagram 3] FIG. 1 is a side view showing a metal joint according to a first embodiment of the present invention. [Figure 4] 4 is a cross-sectional view showing the metal joint according to the first embodiment of the present invention, taken along the line AA in FIG. 3. FIG. [Diagram 5] 1 is a perspective view showing a connecting base of a metal joint according to a first embodiment of the present invention. FIG. [Figure 6]1 is a perspective view showing a fixing portion and a supporting portion of a metal joint according to a first embodiment of the present invention. FIG. [Figure 7] 1 is a perspective view showing a modified example of the fixing portion and the supporting portion of the metal joint according to the first embodiment of the present invention. FIG. [Figure 8] 13 is an oblique view showing another modified example of the fixing portion and the supporting portion of the metal joint according to the first embodiment of the present invention. FIG. [Figure 9] 1 is an explanatory diagram showing a metal joint according to a first embodiment of the present invention, in which a longitudinal cross-sectional view of a connecting base is shown. [Figure 10] 1 is an explanatory diagram showing a metal joint according to a first embodiment of the present invention, in which a longitudinal cross-sectional view of a connecting base is shown. [Figure 11] FIG. 2 is a perspective view showing the installation process of the metal joint according to the first embodiment of the present invention. [Figure 12] FIG. 2 is a perspective view showing the installation process of the metal joint according to the first embodiment of the present invention. [Figure 13] FIG. 2 is a perspective view showing the installation process of the metal joint according to the first embodiment of the present invention. [Figure 14] FIG. 1 is a perspective view showing a metal joint according to a first modified example of the first embodiment of the present invention. [Figure 15] FIG. 15 is a side view showing the first modified example shown in FIG. [Figure 16] FIG. 11 is a perspective view showing the installation process of a metal joint according to a first modified example of the first embodiment of the present invention. [Figure 17] FIG. 11 is a perspective view showing the installation process of a metal joint according to a first modified example of the first embodiment of the present invention. [Figure 18] FIG. 11 is a perspective view showing the installation process of a metal joint according to a first modified example of the first embodiment of the present invention. [Figure 19] 1 is a perspective view showing a first aspect of a metal joint according to a second modified example of the first embodiment of the present invention. FIG. [Figure 20] FIG. 20 is a side view showing the first embodiment shown in FIG. [Figure 21] 13 is a perspective view showing a second aspect of a metal joint according to a second modified example of the first embodiment of the present invention. FIG. [Figure 22]FIG. 11 is a side view showing a first aspect of a metal joint according to a third modified example of the first embodiment of the present invention. [Figure 23] FIG. 23 is a front view showing the first embodiment shown in FIG. 22. [Figure 24] FIG. 11 is a side view showing a first aspect of a metal joint according to a third modified example of the first embodiment of the present invention. [Diagram 25] FIG. 25 is a front view showing the second embodiment shown in FIG. 24. [Figure 26] 27A is a longitudinal cross-sectional view showing a metal joint according to a second embodiment of the present invention, taken along the line CC in FIG. [Figure 27] FIG. 6 is a front view showing a metal joint according to a second embodiment of the present invention. [Figure 28] 27 is a cross-sectional view showing a metal joint according to a second embodiment of the present invention, taken along the line BB in FIG. 26. FIG. [Figure 29] FIG. 11 is a side view showing a metal joint according to a third embodiment of the present invention. [Diagram 30] FIG. 11 is a front view showing a metal joint according to a third embodiment of the present invention. [Diagram 31] 29. FIG. 29 is a cross-sectional view showing a metal joint according to a third embodiment of the present invention, taken along the line DD in FIG. [Diagram 32] 33. FIG. 34 is a longitudinal cross-sectional view showing a first modified example of the metal joint according to the third embodiment of the present invention, taken along the line FF in FIG. [Diagram 33] FIG. 33 is a front view showing the first modified example shown in FIG. 32. [Diagram 34] 33 is a cross-sectional view showing the first modified example shown in FIG. 32, taken along line EE in FIG. [Diagram 35] FIG. 11 is a side view showing a metal joint according to a fourth embodiment of the present invention. [Diagram 36] FIG. 11 is a front view showing a metal joint according to a fourth embodiment of the present invention. [Figure 37] 35. FIG. 36 is a cross-sectional view showing a metal joint according to the fourth embodiment of the present invention, taken along the line GG in FIG. [Figure 38] FIG. 11 is a side view showing a modified example of the metal joint according to the fourth embodiment of the present invention. [Figure 39] FIG. 11 is a front view showing a modified example of the metal joint according to the fourth embodiment of the present invention. [Diagram 40] 38. This is a cross-sectional view showing a modified example of the metal joint according to the fourth embodiment of the present invention, taken along the line HH in FIG. [Diagram 41] FIG. 11 is a side view showing a metal joint according to a fifth embodiment of the present invention. [Diagram 42] Figures 42(A) to (C) are plan, front and side views showing the fixing portion, connecting portion and supporting portion of a joint metal according to the fifth embodiment of the present invention, and Figures 42(D) and (E) are front and side views showing the anchor portion and connecting base of the joint metal according to the same embodiment. [Diagram 43] A side view showing the installation process of a metal joint according to the fifth embodiment of the present invention. [Diagram 44] A side view showing the installation process of a metal joint according to the fifth embodiment of the present invention. [Diagram 45] A side view showing the installation process of a metal joint according to the fifth embodiment of the present invention. [Figure 46] FIG. 13 is a side view showing a metal joint according to a sixth embodiment of the present invention. [Figure 47] FIG. 47 is a front view showing the sixth embodiment shown in FIG. [Figure 48] Figures 48(A) to (C) are plan, front and side views showing the fixing portion, connecting portion and supporting portion of a joint metal according to the sixth embodiment of the present invention, and Figures 48(D) and (E) are front and side views showing the anchor portion and connecting base portion of the joint metal according to the same embodiment. [Figure 49] A side view showing the installation process of a metal joint according to the sixth embodiment of the present invention. [Figure 50] A side view showing the installation process of a metal joint according to the sixth embodiment of the present invention. [Figure 51] A side view showing the installation process of a metal joint according to the sixth embodiment of the present invention. [Figure 52] FIG. 52 is a front view showing the installation process of the metal joint shown in FIG. 51. [Diagram 53]FIG. 13 is a front view showing a metal joint according to the seventh embodiment of the present invention. [Figure 54] 53. FIG. 54 is a longitudinal cross-sectional view showing the metal joint according to the seventh embodiment of the present invention, taken along line II in FIG. [Figure 55] FIG. 1 is an explanatory diagram showing a frame to which a metal joint according to a first embodiment of the present invention is applied, which is an example in which the metal joint is applied to a rigid frame. [Figure 56] FIG. 1 is an explanatory diagram showing a frame to which a metal joint according to a first embodiment of the present invention is applied, and is an example in which diagonal braces or structural plywood are arranged in the frame. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] [First embodiment] A metal joint 10 according to a first embodiment of the present invention will be described with reference to Figs. 1 to 6. The metal joint 10 is a member that joins structural materials of a structure together. The metal joint 10 joins, for example, a first structural material (pillar, wall, ascending beam) that is provided vertically or diagonally above and below in the structure, and a second structural material (foundation, base, beam, girder, cross member) that is provided horizontally in the structure.

[0029] The following describes a case where the connecting metal 10 is applied to a joint between a base 52 that is installed horizontally on a foundation 51 and a pillar 53 that is installed vertically to the base 52. The base 52 and the pillar 53 are made of wood. Note that the application example of the connecting metal 10 is not limited to this example. For example, the connecting metal 10 can also be applied to a joint between a beam that is installed horizontally and a pillar that is located above or below the beam.

[0030] As shown in Figures 1 to 6, the joint hardware 10 comprises an anchor portion 1, a fixing portion 2, a connecting portion 3, a support portion 4, and a connecting base portion 5. Unlike conventional hold-down hardware, the joint hardware 10 has a configuration in which negative and positive forces act on one connecting portion 3, and the anchor portion 1 can withstand not only tensile forces but also compressive forces. Here, when the vertically upward direction is considered positive, the negative force is a force in the vertically downward direction, and the positive force is a force in the vertically upward direction.

[0031] The anchor part 1 is a rod-shaped member, such as an anchor bolt. The anchor part 1 passes through a through hole in the base 52, and is supported by the foundation 51 by having its lower end fixed to the foundation 51. The anchor part 1 is installed on the outside of the pillar 53, parallel to the axial direction of the pillar 53. A male thread is formed on the outer periphery of the anchor part 1, and the male thread can be screwed into a female thread formed on the connection part 7 of the connecting base 5 shown in FIG. 5.

[0032] The fixing part 2 is, for example, a plate-like member, and is connected to a pillar 53 in the structure. In this case, the installation surface of the fixing part 2 is parallel to the surface of the pillar 53. As shown in FIG. 6, a screw hole 11 is formed in the fixing part 2, and the fixing part 2 is connected to the pillar 53 by, for example, a screw 12, as shown in FIGS. 1 to 3. A force is transmitted between the fixing part 2 and the pillar 53. A support part 4 is provided integrally with the fixing part 2.

[0033] 9, 10 and 13, the connecting part 3 is, for example, a pin-shaped member, and the axial direction of the connecting part 3 is perpendicular to the axial direction of the anchor part 1. The connecting part 3 is inserted through the through hole 6 of the support part 4 and the through hole 8 of the connecting base part 5, and is supported by both the support part 4 and the connecting base part 5.

[0034] The connecting part 3 is, for example, a bolt having a bolt head and a male thread, and a nut can be fastened. As a result, the connecting part 3 is inserted into the through holes 6, 8, and then the nut is fastened, so that the connecting part 3 is connected to the support part 4 and fixed to each other. Note that the configuration for fixing the connecting part 3 to the support part 4 is not limited to the example of a combination of a bolt and a nut, and a normal technique for fixing a pin-shaped member can be applied. Also, as long as the connecting part 3 can be prevented from falling off the support part 4, it is not essential to fix the connecting part 3 to the support part 4. There are also cases where the connecting part 3 is not fixed to the support part 4, as in the fourth embodiment described below.

[0035] The support part 4 is provided integrally with the fixed part 2. As shown in FIG. 6, the support part 4 has at least two support plates 14 facing each other, and may have one intermediate plate 15 connected between these two support plates 14. The support plate 14 is installed on the fixed part 2 so that the plate surface is perpendicular to the plate surface of the fixed part 2. The intermediate plate 15 is connected to the support plate 14 at both ends. The plate surface of the intermediate plate 15 is perpendicular to the plate surface of the fixed part 2. As shown in FIG. 7, in the support part 4, the intermediate plate 15 is connected between the two support plates 14, and the plate surface of the intermediate plate 15 may be parallel to the plate surface of the fixed part 2. Also, as shown in FIG. 8, in the support part 4, an intermediate plate does not have to be installed between the two support plates 14.

[0036] The support part 4 is provided in the middle part in the longitudinal direction of the fixed part 2. In the support part 4, the inner dimension of the two support plates 14 is larger than the width of the connecting base 5, and the connecting base 5 can be housed therein.

[0037] A through hole 6 is formed in each of the two support plates 14 of the support part 4. The connecting part 3 can be inserted into the through hole 6. The axial direction of the through hole 6 is perpendicular to the axial direction of the anchor part 1 when the joint metal fitting 10 is installed.

[0038] The support part 4 protrudes from the fixed part 2, and when the fixed part 2 is installed on the pillar 53, it protrudes outward from the surface of the pillar 53. In this way, the support part 4 is connected via the connecting part 3 to the connecting base part 5 installed on the anchor part 1 located on the outside of the pillar 53.

[0039] The connecting base 5 is provided at the tip of the anchor part 1 and supports the connecting part 3. As shown in Fig. 5, the connecting base 5 is, for example, a columnar member such as a rectangular column or a cylindrical column, and has a connecting part 7 and a through hole 8.

[0040] The connection portion 7 is connected to the anchor portion 1. The connection portion 7 is, for example, a screw hole, and is formed with a female thread that can be screwed into a male thread formed at the tip of the anchor portion 1. Note that the connection of the connection portion 7 to the anchor portion 1 is not limited to screw connection, and may be welded.

[0041] The connecting part 3 can be inserted into the through hole 8. When the connecting part 3 is inserted, the connecting base 5 supports the connecting part 3. The axial direction of the through hole 8 is perpendicular to the axial direction of the anchor part 1 when the joint metal fitting 10 is installed.

[0042] Both ends of the connecting part 3 are fixed to the support part 4. Both ends of the connecting part 3 are parallel to the axial direction of the anchor part 1, and movement (displacement) relative to the support part 4 is restricted by the support part 4 in two opposite directions. More specifically, movement of the connecting part 3 relative to the support part 4 is restricted at the portion where the connecting part 3 abuts against the through hole 6 formed in the support plate 14 of the support part 4. As a result, one connecting part 3 can resist both tensile and compressive forces acting on the anchor part 1, and therefore the anchor part 1 can bear not only tensile forces but also compressive forces.

[0043] The movement (displacement) of the connecting part 3 relative to the supporting part 4 is not restricted in any part (other than both ends of the connecting part 3) other than the part where the movement is restricted by the supporting part 4. In the part where the movement is not restricted by the supporting part 4, the connecting part 3 is capable of movement (displacement) relative to the supporting part 4. Therefore, the connecting part 3 can be repeatedly deformed by the force acting on the part where the movement is not restricted by the supporting part 4, i.e., the force transmitted from the connecting base 5, and thus the deformation performance of the connection between the structural materials is improved and stabilized.

[0044] The movement (displacement) of the connecting portion 3 relative to the support portion 4 is in two ways depending on the width of the connecting base portion 5 and whether the occurrence of bending deformation in the connecting portion 3 is suppressed or not.

[0045] The first displacement is when the width of the connecting base 5 is such that a necessary gap is formed between the connecting base 5 and the support plate 14, as shown in Fig. 9, and bending deformation occurs in the connecting part 3. The bending deformation of the connecting part 3 can be calculated, for example, by a both-end fixed beam model in which both ends of the connecting part 3 are fixed. The second displacement is when the width of the connecting base 5 is approximately the same as the inner dimension between the support plates 14 of the support part 4, no gap is formed between the connecting base 5 and the support plate 14, and the occurrence of bending deformation of the connecting part 3 is suppressed, as shown in Fig. 10.

[0046] In these examples, the width of the connecting base 5 is adjusted to be set to one of two different widths. The required width of the connecting base 5 can be determined by the cross-sectional area of ​​the anchor part 1. The cross-sectional area of ​​the connecting base 5 is set so as to ensure both the tensile force and the compressive force borne by the anchor part 1. Specifically, the cross-sectional area of ​​the connecting base 5 is set to be equal to or larger than the cross-sectional area of ​​the anchor part 1.

[0047] If the buckling load of the anchor part 1 is smaller than the bending yield load or shear yield load of the connecting part 3, there is a risk that the anchor part 1 will buckle before the yield of the connecting part 3. Therefore, it is desirable that the bending yield load or shear yield load of the connecting part 3 is smaller than the buckling load of the anchor part 1.

[0048] As a result, in the case where the connecting part 3 undergoes bending deformation, when a compressive force acts on the anchor part 1, the connecting part 3 will first yield in bending before buckling occurs in the anchor part 1. Alternatively, in the case where the bending deformation of the connecting part 3 is restrained by the connecting base 5, when a compressive force acts on the anchor part 1, the connecting part 3 will first yield in shear before buckling occurs in the anchor part 1. Note that since the buckling load of the anchor part 1 can be set, for example, by adjusting the flexible length of the anchor part 1, buckling can be prevented by shortening the flexible length of the anchor part 1.

[0049] Therefore, damage to the anchor part 1 due to buckling or brittle fracture can be avoided, and the connecting part 3 maintains a nearly constant rigidity within the elastic range and exhibits stable behavior against repeated loads until bending yield or shear yield. When subjected to a load equal to or greater than the bending yield load or shear yield load, the connecting part 3 increases the amount of repeated deformation through plastic deformation, so that the increase in load becomes gradual and the load plateaus. As a result, the connecting part 3 can absorb more energy than before yielding. The connecting metal 10 therefore contributes to further improving and stabilizing the deformation performance of connections between structural materials.

[0050] When a bending yield load or a shear yield load acts on the connecting portion 3, bending yield occurs in the fixing portion 2, and the fixing portion 2 undergoes plastic deformation. As a result, the fixing portion 2 assumes a dogleg-like bent shape, which may destroy the column 53 to which the fixing portion 2 is fixed. Therefore, it is desirable that the fixing portion 2 has a configuration that does not cause bending yield when a bending yield load or a shear yield load acts on the connecting portion 3.

[0051] As a result, even if a bending yield load or a shear yield load acts on the connecting portion 3, the fixing portion 2 does not undergo plastic deformation due to bending yield. Therefore, the fixing portion 2 maintains the shape it has when installed on the column 53. For example, the installation surface of the fixing portion 2 remains parallel to the surface of the column 53. As a result, destruction of the column 53 to which the fixing portion 2 is fixed can be prevented.

[0052] The configuration in which the fixing part 2 does not undergo bending yield when a bending yield load or a shear yield load acts on the connecting part 3 means that (1) as in the above-described embodiment, the installation position of the support part 4 in the fixing part 2 is set to the middle part in the longitudinal direction of the fixing part 2, so that the fixing part 2 is fixed to the column 53 at both the top and bottom of the support part 4. Also, (2) as will be described in the second modified example below, the stress generated in the fixing part 2 when the connecting part 3 undergoes a bending yield load or a shear yield load may be set to be lower than the bending yield load of the fixing part 2.

[0053] Next, a method for installing the metal joint 10 according to the first embodiment of the present invention will be described with reference to Figs. The metal joint 10 is provided at the joint between the base 52 and the pillar 53. First, as shown in Fig. 11, the connecting base 5 is connected to the anchor part 1 which penetrates the base 52 and is supported on the foundation 51. Specifically, the female thread formed on the connection part 7 of the connecting base 5 is screwed into the male thread formed on the tip of the anchor part 1. The anchor part 1 and the connecting base 5 need to be securely connected so as to withstand the tensile and compressive forces acting on the joint metal 10.

[0054] Moreover, taking into consideration the direction of the connecting part 3 inserted into the through hole 8 of the connecting base 5, the direction of the connecting base 5 is adjusted.

[0055] 12, the fixing part 2 with the support part 4 integrally provided therewith is installed on the pillar 53. At this time, the connecting base 5 is installed inside the support part 4. The fixing part 2 is installed on the pillar 53 so that the length direction of the fixing part 2 is parallel to the axial direction of the anchor part 1 and parallel to the axial direction of the pillar 53. In addition, the installation position of the fixing part 2 is adjusted so that the height position of the through hole 8 of the connecting base 5 and the height position of the through hole 6 of the support part 4 are aligned.

[0056] After the installation position of the fixed part 2 has been adjusted, the connecting part 3 is inserted into the through hole 6 of the support part 4 and the through hole 8 of the connecting base part 5, as shown in Fig. 13. This determines the installation position of the fixed part 2. Then, the screw 12 is inserted into the screw hole 11 of the fixed part 2, and the fixed part 2 is fixed to the pillar 53 by the screw 12. As a result of the above, the metal joint 10 is provided at the joint between the base 52 and the pillar 53 as shown in FIGS.

[0057] <First Modification> Next, a first modified example of the metal joint 10 according to the present embodiment will be described with reference to Figs. In the above embodiment, a case has been described in which the anchor part 1 is located on the outside of the pillar 53, but the present invention is not limited to this example. As shown in Fig. 16, the present invention can also be applied to a case in which a bolt hole 56 is formed inside the pillar 53 along the pillar axial direction, the anchor part 1 is inserted into the bolt hole 56 of the pillar 53, and the anchor part 1 is located on the inside of the pillar 53.

[0058] A cutout portion 55 is formed in the pillar 53 in a position corresponding to the position where the connecting base portion 5 and the support portion 4 are to be installed. The cutout portion 55 communicates with the bolt hole 56 formed in the pillar 53 described above.

[0059] As in the first embodiment, the metal joint 10 according to this modification includes an anchor portion 1, a fixing portion 2, a connecting portion 3, a support portion 4, and a connecting base portion 5. Note that detailed description of components having configurations and functions and effects that overlap with those of the first embodiment described above will be omitted.

[0060] The support part 4 protrudes from the fixed part 2, and when the fixed part 2 is installed on the column 53, it is inserted into the notch part 55 of the column 53. This allows the joint metal 10 to be joined to the anchor part 1 located on the inside of the column 53.

[0061] Next, a method for installing the metal joint 10 according to this modified example will be described. 16, the anchor part 1 penetrates a base 52 and is supported by the foundation. When the base 52 and a pillar 53 are joined, the anchor part 1 is inserted into a bolt hole 56 formed in the pillar 53 and installed inside the pillar 53.

[0062] When the base 52 and the pillar 53 are joined, the tip of the anchor part 1 is exposed from the cutout part 55. As shown in Fig. 17, the connecting base part 5 is connected to the anchor part 1 exposed from the cutout part 55. At this time, the orientation of the connecting base part 5 is adjusted taking into consideration the orientation of the connecting part 3 inserted into the through hole 8 of the connecting base part 5.

[0063] Next, the fixing part 2 with the support part 4 integrally provided therewith is installed on the pillar 53. At this time, the support part 4 is inserted inside the cutout part 55 of the pillar 53. Also, the connecting base 5 is installed inside the support part 4. After the installation position of the fixing part 2 is adjusted, the connecting part 3 is inserted into the through hole 6 of the support part 4 and the through hole 8 of the connecting base 5 as shown in FIG. 18. This determines the installation position of the fixing part 2. Then, as shown in FIG. 14, the screw 12 is inserted into the screw hole 11 of the fixing part 2, and the fixing part 2 is fixed to the pillar 53 by the screw 12.

[0064] Note that a recess corresponding to the shape of the fixed part 2 may be formed on the surface of the pillar 53. As a result, the fixed part 2 is housed in the recess, and is thus embedded and installed in the pillar 53. If the plate thickness of the fixed part 2 and the depth of the recess are the same, the surface of the pillar 53 and the surface of the fixed part 2 can be made to be on the same plane.

[0065] <Second Modification> Next, a second modified example of the metal joint 10 according to this embodiment will be described with reference to Figs. In the above first embodiment and first modified example, the case where the support part 4 is provided in the middle part in the length direction of the fixed part 2 has been described, but the present invention is not limited to this example. That is, the present invention can also be applied to the case where the support part 4 is provided at one end part in the length direction of the fixed part 2 as shown in Figs. 19 to 21.

[0066] The support part 4 is provided integrally with the fixed part 2 at one end in the length direction of the fixed part 2, that is, at the lower end of the fixed part 2 when the fixed part 2 is attached to the column 53. In this modification, the attachment position of the support part 4 can be set to a position closer to the joint part between the base 52 and the column 53 than in the first embodiment described above. The closer the support part 4 is to the joint part between the base 52 and the column 53, the larger the buckling load of the anchor part 1 becomes, so that buckling during compression can be delayed or prevented. In addition, since the strain of the anchor part 1 becomes large both during compression and tension, this modification can develop strength early when an external force is input. In other words, the rigidity at the joint part between the structural materials becomes high, which is structurally advantageous.

[0067] In this way, when the support part 4 is provided at the lower end of the fixed part 2 and not at the intermediate part in the longitudinal direction of the fixed part 2, the fixed part 2 is not fixed to the pillar 53 below the support part 4. Therefore, in this modified example, when the pillar 53 deforms and a compressive force acts on the anchor part 1, the fixed part 2 is more likely to be plastically deformed than in the first embodiment. When the fixed part 2 is plastically deformed, it becomes bent in an L-shape, and there is a risk of destroying the pillar 53.

[0068] In this modification, it is desirable that the metal joint 10 is designed so that the fixing part 2 does not undergo bending yield when a bending yield load or a shear yield load acts on the connecting part 3. Specifically, the bending yield load of the fixing part 2 is set to be lower than the bending yield load of the fixing part 2 when the connecting part 3 is under a yield load, for example, by increasing the bending yield load of the fixing part 2.

[0069] As a result, the connecting portion 3 maintains a nearly constant rigidity within its elastic range and exhibits stable behavior against repeated loads until bending yield or shear yield occurs. When subjected to a load equal to or greater than the bending yield load or shear yield load, the connecting portion 3 can absorb more energy than before yield due to plastic deformation.

[0070] In the example shown in Fig. 19, the width of the fixing part 2 is relatively wide, while in the example shown in Fig. 21, the width of the fixing part 2 is relatively narrow. In either case, the relationship between the bending yield load of the fixing part 2 and the bending yield load or shear yield load of the connecting part 3 can be adjusted.

[0071] <Third Modification> Next, a third modified example of the metal joint 10 according to this embodiment will be described with reference to Figs. In the above embodiment, the anchor part 1 is supported by the foundation 51 by penetrating the through-hole of the base 52 and fixing the lower end to the foundation 51, but the present invention is not limited to this example. The anchor part 1 may be a post-installation anchor bolt, and may be installed directly on the foundation, beam, etc. instead of the foundation 51.

[0072] The metal joint 10 has a base portion 9, which is installed on the surface of a foundation or a beam. The base portion 9 is fixed to the foundation or the beam with a screw, which is omitted in the drawing.

[0073] 22 and 23 show a case where the base portion 9 has a U-shape. The base portion 9 is installed on the upper surface of the foundation 52, and prevents the base portion 9 from tipping over in the lateral direction. Figs. 24 and 25 show a case where the base portion 9 has an L-shape. This allows the joint metal fitting 10 to be installed on the structural material by using a post-installed anchor bolt at the portion where the pillar 53 and the foundation 52 intersect in the L shape.

[0074] In this modification, as shown in Figures 22 to 25, the connecting part 3, support part 4 and connecting base part 5 are provided not only on the fixed part 2 side, which is one end side of the rod part, but also on the base part 9 side, which is the other end side of the rod part. Note that as long as the connecting part 3 is provided at either one end of the anchor part 1, the other end may be fixed to the fixed part 2 or the base part 9 by welding or the like. Although yielding does not occur at the end of the welded part, since the connecting part 3 is provided at one side, a configuration can be achieved in which repeated deformation of the connecting part 3 occurs.

[0075] [Second embodiment] Next, a metal joint 20 according to a second embodiment of the present invention will be described with reference to Figs. In the above-described first embodiment, the inner dimensions of the two support plates 14 of the support part 4 provided on the fixing part 2 are larger than the width of the connecting base 5 of the anchor part 1, and the support part 4 accommodates the connecting base 5 therein, but the present invention is not limited to this example.

[0076] In this embodiment, the connecting base 5 houses the support part 4 provided on the fixed part 2 . Specifically, as shown in Figures 27 and 28, the connecting base 5 of the anchor part 1 has two support plates 16. The support part 4 is provided integrally with the fixing part 2 and is made of, for example, a single plate material. A through hole 6 is formed in the support part 4.

[0077] The support plate 16 is installed on the anchor part 1 so that the plate surface is parallel to the axial direction of the anchor part 1. The support plate 16 is formed with a through hole through which the connecting part 3 can be inserted.

[0078] The inner dimension of the two support plates 16 is larger than the width of the support part 4 provided on the fixed part 2, and the connecting base 5 accommodates the support part 4 therein. The support part 4 is located inside the connecting base 5, and the connecting part 3 is inserted into the through hole of the support part 4 and the through hole of the connecting base 5, and the support part 4 and the connecting base 5 support the connecting part 3.

[0079] In this embodiment, unlike the first embodiment, the connecting portion 3 is connected to a connecting base portion 5 instead of a supporting portion 4, and they are fixed to each other.

[0080] Both ends of the connecting portion 3 are fixed to the connecting base 5, and the connecting base 5 is arranged to rotate the anchor portion 1 in two directions that are parallel to the axial direction of the anchor portion 1 and opposite to each other. Connecting base 5Movement (displacement) of the connecting part 3 relative to the connecting base 5 is restricted. More specifically, at the portion where the connecting part 3 abuts against the through hole formed in the support plate 16 of the connecting base 5, the movement of the connecting part 3 relative to the connecting base 5 is restricted. As a result, one connecting part 3 can resist both tensile and compressive forces acting on the anchor part 1, and therefore the anchor part 1 can bear not only tensile forces but also compressive forces.

[0081] The movement (displacement) of the connecting part 3 relative to the connecting base 5 is not restricted in any part (other than both ends of the connecting part 3) other than the part whose movement is restricted by the connecting base 5. In the part whose movement is not restricted by the connecting base 5, the connecting part 3 is able to move (displace) relative to the connecting base 5. Therefore, the connecting part 3 can be repeatedly deformed by the force acting on the part whose movement is not restricted by the connecting base 5, i.e., the force transmitted from the supporting part 4, and thus the deformation performance of the connection between the structural materials is improved and stabilized.

[0082] The movement (displacement) of the connecting portion 3 relative to the connecting base portion 5 is in two ways depending on the width of the support portion 4 and whether the occurrence of bending deformation in the connecting portion 3 is suppressed or not.

[0083] The first displacement is when the width of the support part 4 is such that a necessary gap is formed between the support part 4 and the support plate 16, and bending deformation occurs in the connecting part 3. In this case, by making the bending yield load of the connecting part 3 smaller than the buckling load of the anchor part 1, when a compressive force acts on the anchor part 1, the connecting part 3 bends and yields first before the anchor part 1 buckles. The second displacement is when the width of the support part 4 is approximately the same as the inner dimension between the support plates 16 of the connecting base 5, no gap is formed between the support part 4 and the support plate 16, and the occurrence of bending deformation in the connecting part 3 is suppressed. In this case, by making the shear yield load of the connecting part 3 smaller than the buckling load of the anchor part 1, when a compressive force acts on the anchor part 1, the connecting part 3 shear yields first before the anchor part 1 buckles.

[0084] [Third embodiment] Next, a metal joint 30 according to a third embodiment of the present invention will be described with reference to Figs. In the above first embodiment, an example has been described in which the anchor portion 1 and the connecting base 5 are separate members and are integrally connected to each other by screw connection or the like. However, the present invention is not limited to this example.

[0085] In this embodiment, as shown in Figures 29 to 34, the connecting base 5 has a shape integrated with the anchor part 1. The anchor part 1 and the connecting base 5 form a connecting anchor part 31. In the connecting anchor part 31, the anchor part 1 and the connecting base 5 have the same cross-sectional shape. The connecting anchor part 31 has, for example, a U-shaped cross-section. A through hole is formed in the connecting base 5 at one end side of the connecting anchor part 31, through which the connecting part 3 can be inserted.

[0086] The connecting anchor part 31 is installed inside the support part 4. That is, the connecting anchor part 31 is located between the support plates 14 of the support part 4. The cross-sectional shape of the connecting anchor part 31 is not limited to the illustrated example of a U-shape, and may be an H-shape, a circular shape, or a rectangular shape. The connecting part 3 is inserted through a through hole of the support part 4 and a through hole of the connecting base part 5, and the connecting part 3 is fixed to the support part 4 by a bolt connection.

[0087] The support plate 14 of the support part 4 may be installed not at the widthwise end of the fixed part 2 but at the middle side in the width direction of the fixed part 2 as shown in Figures 29 to 31, or may be installed along the widthwise end of the fixed part 2 as shown in Figures 32 to 34. Furthermore, the length of the support plate 14 of the support part 4 may be shorter than the length of the fixed part 2 as shown in Figures 29 to 31, or may be the same as the length of the fixed part 2 as shown in Figures 32 to 34.

[0088] 29 to 34, or when the connecting anchor part 31 has an H-shaped cross section unlike the illustrated examples, the connecting anchor part 31 may be installed on the outside of the support part 4. In this case, the connecting part 3 is inserted through a through hole of the support part 4 and a through hole of the connecting base part 5, and the connecting part 3 is fixed to the connecting base part 5 by bolt connection.

[0089] [Fourth embodiment] Next, a metal joint 40 according to a fourth embodiment of the present invention will be described with reference to Figs. In the above-described first embodiment, a case has been described in which the connecting part 3 inserted into the through holes 6, 8 is fixed to the support part 4 by a bolt fastening, and in the second embodiment, a case has been described in which the connecting part 3 is fixed to the connecting base 5 by a bolt fastening, but the present invention is not limited to this example.

[0090] As shown in Figures 35 to 37, the connecting part 3 is integrated with the connecting base 5 and fixed to each other. The connecting base 5 has, for example, a cylindrical shape, and is provided on an extension of the anchor part 1. The connecting part 3 is formed to protrude outward from the side surface of the connecting base 5. The connecting part 3 has, for example, a pin shape. The connecting base 5 is installed between the support plates 14 of the support part 4.

[0091] The support part 4 is provided with a notch part 18. The notch part 18 has, for example, a concave shape recessed from the end opposite the fixed part 2 toward the fixed part 2. The connecting part 3 is inserted into the notch part 18 of the support part 4 and engaged with the support part 4.

[0092] In this embodiment, the present invention is not limited to the case where the connecting portion 3 is pin-shaped. The connecting portion 3 may be engageable with the support portion 4 and may have a shape that protrudes outward from the connecting base portion 5. For example, the connecting portion 3 may be a plate-shaped member having a hexagonal shape, as shown in Figs. 38 to 40. Moreover, the connecting portion 3 may be a disk-shaped or other polygonal plate-shaped member instead of a hexagonal plate-shaped member.

[0093] One end of the connecting part 3 is fixed to a connecting base 5, and the connecting base 5 restricts movement (displacement) of the connecting part 3 relative to the connecting base 5 in two opposite directions parallel to the axial direction of the anchor part 1.

[0094] The movement (displacement) of the connecting part 3 relative to the connecting base 5 is not restricted except in the portion where the movement is restricted by the connecting base 5. In the portion where the movement is not restricted by the connecting base 5, the connecting part 3 is capable of movement (displacement) relative to the connecting base 5. Therefore, the connecting part 3 can be repeatedly deformed by a force acting on the portion where the movement is not restricted by the connecting base 5, i.e., a force transmitted from one support part 4.

[0095] The movement (displacement) of the connecting portion 3 relative to the connecting base portion 5 is in two ways depending on the width of the support portion 4 and whether the occurrence of bending deformation in the connecting portion 3 is suppressed or not.

[0096] The first displacement is a case where a necessary gap is formed between the support part 4 and the connecting base part 5, and bending deformation occurs in the connecting part 3. In this case, by making the bending yield load of the connecting part 3 smaller than the buckling load of the anchor part 1, when a compressive force acts on the anchor part 1, the connecting part 3 will bend and yield first before the anchor part 1 buckles. The bending deformation of the connecting part 3 can be calculated, for example, by a double-supported beam model in which both ends of the connecting part 3 are simply supported. The second displacement is a case where no gap is formed between the support part 4 and the connecting base part 5, and the occurrence of bending deformation in the connecting part 3 is suppressed. In this case, by making the shear yield load of the connecting part 3 smaller than the buckling load of the anchor part 1, when a compressive force acts on the anchor part 1, the connecting part 3 will bend and yield first before the anchor part 1 buckles.

[0097] [Fifth embodiment] Next, a metal joint 50 according to a fifth embodiment of the present invention will be described with reference to Figs. In this embodiment, as shown in Figs. 41 and 42, the connecting portion 3 and the supporting portion 4 are integral with each other and fixed to each other. The connecting part 3 is a rod-shaped member that is installed between the two support plates 14 of the support part 4 and is connected to the support plates 14 by welding or the like. In this embodiment, the fixing part 2, the connecting part 3 and the support part 4 are integrated with each other.

[0098] The connecting base 5 is provided with a cutout 19 that is a recess recessed inward from the outer surface. The connecting part 3 can be inserted into the inside of the cutout 19. The upper and lower inner surfaces of the cutout 19 are perpendicular to the axial direction of the anchor part 1 when the anchor part 1 is installed on a structural material such as a foundation.

[0099] The connecting portion 3 is integrated with the support portion 4. Therefore, the movement (displacement) of the connecting portion 3 relative to the support portion 4 in the axial direction of the anchor portion 1 is restricted by the support portion 4.

[0100] The movement (displacement) of the connecting part 3 relative to the supporting part 4 is not restricted in any part (other than both ends of the connecting part 3) other than the part whose movement is restricted by the supporting part 4. In the part whose movement is not restricted by the supporting part 4, the connecting part 3 is capable of movement (displacement) relative to the supporting part 4. Therefore, the connecting part 3 can be repeatedly deformed by a force acting on the part whose movement is not restricted by the supporting part 4, i.e., a force transmitted from the connecting base 5.

[0101] As in the first embodiment, movement (displacement) of the connecting part 3 relative to the support part 4 can occur in two ways, depending on the width of the connecting base 5: bending deformation occurs in the connecting part 3, or the occurrence of bending deformation is suppressed.

[0102] Next, a method for installing the metal joint 50 according to the fifth embodiment of the present invention will be described. The metal joint 50 is provided at the joint between the base 52 and the pillar 53. First, as shown in Fig. 43, the connecting base 5 is connected to the anchor part 1 which penetrates the base 52 and is supported by the foundation 51. Specifically, the connecting base 5 is connected to the tip of the anchor part 1 by screw connection. At this time, the orientation of the connecting base 5 is adjusted taking into consideration the orientation of the connecting part 3 which is inserted into the cutout part 19 of the connecting base 5.

[0103] Next, as shown in Fig. 44, before erecting the pillar 53, the fixed part 2, connecting part 3 and supporting part 4 which are integrated with each other are installed in the connecting base 5. At that time, the connecting part 3 is inserted into the notch part 19 of the connecting base 5. In this embodiment, the connecting base 5 is installed inside the two supporting plates 14 of the supporting part 4. Then, as shown in Fig. 45, with the connecting part 3 inserted into the notch part 19, the pillar 53 is erected into the base 52.

[0104] Then, the fixing part 2, in which the connecting part 3 and the support part 4 are integrally provided, is attached to the pillar 53 with a screw or the like. The connecting part 3 moves inside the cutout part 19, and the connecting part 3 and the connecting base part 5 maintain the engaged state. 41, the joint metal 50 is provided at the joint between the base 52 and the column 53. In this embodiment, since the connecting part 3 is integrated with the supporting part 4 in advance, there is no need to attach the connecting part 3 to the supporting part 4 at the site.

[0105] [Sixth embodiment] Next, a metal joint 60 according to a sixth embodiment of the present invention will be described with reference to Figs. In the above-described first embodiment, a case has been described in which the connecting part 3 is inserted through the through hole 6 of the support part 4 and the through hole 8 of the connecting base 5, and the connecting part 3 is fixed to the connecting base 5 by a bolt fastening, but the present invention is not limited to this example. 46 to 48, in this embodiment, the connecting part 3 has a pin part 61 and an attachment part 62. The pin part 61 of the connecting part 3 is fixed to the supporting part 4 via the attachment part 62 which can be fitted onto the outer periphery of the supporting part 4.

[0106] The mounting portion 62 is capable of mounting the pin portion 61 to the support portion 4. The mounting portion 62 is composed of, for example, two plate materials 63 and two sets of pins 64, and the two plate materials 63 restrict left-right movement relative to the support portion 4, and the two pins 64 restrict up-down movement relative to the support portion 4.

[0107] The pin portion 61 is a rod-shaped member that is disposed between two plate materials 63 of the attachment portion 62 and is connected to the plate materials 63 by welding or the like.

[0108] The connecting base 5 is provided with a notch 19 that is a recess recessed inward from the outer surface. The pin 61 of the connecting part 3 can be inserted into the inside of the notch 19. The upper and lower inner surfaces of the notch 19 are perpendicular to the axial direction of the anchor part 1 when the anchor part 1 is installed on a structural material such as a foundation.

[0109] The pin portion 61 of the connecting portion 3 is fixed to the support portion 4 with the mounting portion 62 fitted into the support portion 4, and the connecting portion 3 is parallel to the axial direction of the anchor portion 1 by the support portion 4, and movement (displacement) of the connecting portion 3 relative to the support portion 4 is restricted in two opposite directions.

[0110] The movement (displacement) of the connecting part 3 relative to the supporting part 4 is not restricted in any part other than the part whose movement is restricted by the supporting part 4 (other than the part that fits with the supporting part 4). In the part whose movement is not restricted by the supporting part 4, the connecting part 3 is capable of movement (displacement) relative to the supporting part 4. Therefore, the connecting part 3 can be repeatedly deformed by a force acting on the part whose movement is not restricted by the supporting part 4, i.e., a force transmitted from the connecting base 5.

[0111] As in the first embodiment, the movement (displacement) of the pin portion 61 of the connecting portion 3 relative to the support portion 4 can occur in two ways, depending on the width of the connecting base 5: bending deformation occurs in the pin portion 61, or the occurrence of bending deformation is suppressed.

[0112] Next, a method for installing the metal joint 60 according to the sixth embodiment of the present invention will be described. The joint metal fitting 60 is provided at the joint portion between the base 52 and the column 53. Here, a case will be described in which the joint metal fitting 60 according to this embodiment is installed to reinforce a conventional ball-down metal fitting that has already been installed. The anchor portion, fixing portion and support portion of the installed hold-down metal fitting are used as the anchor portion 1, fixing portion 2 and support portion 4 of the joint metal fitting 60 according to this embodiment.

[0113] In the installed hold-down hardware, as shown in Fig. 49, a nut 57 is installed at the tip of the anchor part 1. Then, the nut 57 installed at the anchor part 1 is removed. The anchor part 1 penetrates the base 52 and is supported by the foundation.

[0114] 50, the connecting base 5 is connected to the anchor part 1 from which the nut 57 has been removed. Specifically, the connecting base 5 is connected to the tip of the anchor part 1 by screw connection. At this time, the orientation of the connecting base 5 is adjusted taking into consideration the orientation of the connecting part 3 inserted into the cutout part 19 of the connecting base 5.

[0115] Next, as shown in Figures 51 and 52, the connecting part 3 is installed with respect to the support part 4 and the connecting base 5. The pin 64 constituting the mounting part 62 of the connecting part 3 is in a state where it has been removed from the plate material 63. The two support plates 14 of the support part 4 and the connecting base 5 are installed inside the two plate materials 63 of the connecting part 3. The pin part 61 of the connecting part 3 is inserted into the notch part 19 of the connecting base 5. Then, with the pin part 61 inserted into the notch part 19, the pin 64 is inserted into the plate material 63 and fixed by a nut. As a result, the mounting part 62 of the connecting part 3 fits into the support part 4, and the connecting part 3 is engaged with the connecting base 5. From the above, as shown in Figures 46 and 47, a joint metal 50 is provided at the joint portion between the base 52 and the pillar 53.

[0116] [Seventh embodiment] Next, a metal joint 70 according to a seventh embodiment of the present invention will be described with reference to Figs. In the above-mentioned fifth embodiment, a case was described in which the connecting portion 3 is integrated with the support portion 4 and has a shape in which they are fixed to each other, and the connecting portion 3 engages with the notch portion 19 formed in the connecting base 5, but the present invention is not limited to this example.

[0117] In this embodiment, as shown in Figs. 53 and 54, a through hole with a female thread is formed in the vertical direction in the connecting part 3. The connecting base 5 has a male thread formed in the upper part of the anchor part 1. The female thread formed in the through hole of the connecting part 3 is engaged with the male thread of the connecting base 5 on the upper part of the anchor part 1. In the example shown in Figs. 53 and 54, the top of the anchor part 1 is formed to protrude outward from the outer circumferential surface of the shaft part of the anchor part 1. However, even if the protruding part of the top of the anchor part 1 is not in contact with the connecting part 3, one connecting part 3 can resist both the tensile force and the compressive force acting on the anchor part 1. Therefore, the anchor part 1 can bear not only the tensile force but also the compressive force.

[0118] One connecting part 3 is integrated with the support part 4 and fixed to the support part 4, and the support part 4 restricts movement (displacement) of the connecting part 3 relative to the support part 4 in two opposite directions parallel to the axial direction of the anchor part 1.

[0119] The movement (displacement) of the connecting part 3 relative to the supporting part 4 is not restricted in any part (other than both ends of the connecting part 3) where the movement (displacement) is restricted by the supporting part 4. In the part where the movement is not restricted by the supporting part 4, the connecting part 3 is capable of movement (displacement) relative to the supporting part 4. Therefore, the connecting part 3 can be repeatedly deformed by a force acting on the part where the movement is not restricted by the supporting part 4, i.e., a force transmitted from the connecting base 5.

[0120] Since the connecting base 5 and the connecting part 3 are locally connected by a screw connection, bending deformation of the connecting part 3 is not suppressed by the connecting base 5. Therefore, in this embodiment, movement (displacement) of the connecting part 3 relative to the support part 4 is bending deformation in the connecting part 3.

[0121] In this embodiment, since the connecting part 3 is integrated with the supporting part 4 in advance, there is no need to attach the connecting part 3 to the supporting part 4 at the site. When the anchor part 1 is fixed to a foundation, a base, a beam, or the like, the anchor part 1 is inserted into the through hole of the connecting part 3, and the connecting base part 5 is connected to the connecting part 3 by screw coupling. At this time, the male thread of the connecting base part 5 is engaged with the female thread of the connecting part 3.

[0122] [Other embodiments] The joint member according to the present invention can also be applied to the joint between two columns or two beams arranged in the same axial direction. That is, the joint metal 10 can be applied to the joint between a first structural member and a second structural member arranged in the same axial direction as the first structural member on the extension of the first structural member. In this case, the anchor part is, for example, a double-threaded bolt. In this case, the anchor part can also be applied to the case where the first structural member and the second structural member arranged in the same axial direction are joined by penetrating an intersecting cross member or beam.

[0123] [Example] Hereinafter, a structure to which the metal joint 10 according to the first embodiment of the present invention is applied will be described with reference to Fig. 55 and Fig. 56. In this structure, a stable structure capable of repeated deformation is realized.

[0124] An example of the case where the connecting metal fitting 10 of this embodiment is applied to a rigid frame structure without braces or structural plywood in a typical one module of a conventional structure (column size: cross-sectional width 105 mm, cross-sectional depth 105 mm, height 2730 mm, column center-to-center distance 910 mm) is shown below.

[0125] <Specifications of metal joint 10> Anchor part 1: diameter 16 mm, flexible length 155 mm, distance between column center and anchor part center 78.5 mm Fixing part 2: Plate thickness 6mm, width 60mm, length 215mm Connection part 3: diameter 14 mm, flexible length 25 mm

[0126] <Example: When the metal joint 10 is installed on both sides of the head and base of one column 53 (total of four places)> As shown in Figure 55, when a horizontal force acts on a frame, at the head and base of one column 53, the compressive force acting on the joint metal 10 on the compression side and the tensile force acting on the tension side are balanced. The inflection point of the column 53 is the center of the column 53 (≒ half the column height). The horizontal resistance Qu of a single column is the smaller of the shear strength Qsu of the column 53, which is made of wood, and the shear force Qmu when the connecting part 3 of the joint metal 10 is at its elastic limit. At this time, the shear force of the column 53 is transmitted from the male tenon to the female tenon of the base 52 or the beam 54 (this is generally known in conventional structures).

[0127] According to rough calculations, the horizontal resistance force Qu of columns to which the metal joint 10 is applied is 2.5kN per column, and 5.0kN for two columns, and this frame can repeatedly withstand this horizontal force. This horizontal resistance force can be converted into a wall factor by dividing it by the standard strength of 1.96kN / m and then by the distance between the columns' centers, which gives a value of 2.86. This is about the same as the wall factor of general structural plywood (board thickness 9mm, nail pitch 150mm), and it can be said that this frame has a certain level of horizontal resistance force even without braces or structural plywood.

[0128] The shear strength Qsu of the wooden column 53 is the general compressive strength of wooden materials, 20 N / mm 2 This can be roughly calculated by multiplying the cross-sectional area by 1 / 10 of the force, which is 22kN. The shear force Qmu when the connecting part 3 is just at its elastic limit can be roughly calculated by multiplying the compressive force (= tensile force) acting on the anchor part 1 when the connecting part 3 is just at its elastic limit by the distance between the column center and the anchor part center to calculate the moment, and then dividing it by the height of the inflection point. The value is 2.5kN.

[0129] Here, the compressive force (=tensile force) acting on the anchor part 1 when the connecting part 3 is at its elastic limit is the yield strength of the connecting part 3, which is made of steel, 345 N / mm 2It can be roughly calculated by dividing by 1 / 8 of the flexible length of the connecting part 3 and multiplying it by the section modulus, which is 44 kN. In this case, the connecting part 3 was modeled as a beam supported at both ends with a centrally concentrated load.

[0130] In addition, the compressive force (= tensile force) acting on the anchor part 1 when the connecting part 3 is just at its elastic limit falls below the buckling load of 67 kN of the anchor part 1. At this time, the buckling load of the anchor part 1 was calculated using a general formula for a model with the bottom end fixed and the top end free.

[0131] In the second modified example of the first embodiment shown in Fig. 19 to Fig. 21, it is necessary to take into account the bending deformation of the fixed part 2, and the above calculation is added to the bending yield test of the fixed part 2. An example of a method for testing the bending yield of the fixed part 2 will be described below. Assuming that an arbitrary deformation angle θp of the frame and the angle between the compressive force (=tensile force) acting on the anchor part 1 and the vertical direction is equal to the deformation angle of the assumed frame, the force that causes the bending deformation of the fixed part 2 is the horizontal component of the compressive force (=tensile force) acting on the anchor part 1. The bending yield test of the fixed part 2 can be performed by comparing the horizontal component of the compressive force (=tensile force) acting on the anchor part 1 with the bending yield load when the part of the fixed part 2 that is not fixed to the column 53 by a screw or the like is modeled as a cantilever beam.

[0132] As shown in Fig. 56, it is also possible to place braces or structural plywood 58 on the frame and place connecting metal fittings 10 on the outside of the head and base of each column. The braces or structural plywood 58 are placed in the hatched areas of Fig. 56. Even in this case, the connecting metal fittings 10 according to this embodiment can bear compressive forces, and the connecting parts 3 can be repeatedly deformed, so that input energy can be converted into kinetic energy of the connecting parts 3. As a result, a frame to which connecting metal fittings 10 are applied reduces the burden on the braces or structural plywood 58 and contributes to improving and stabilizing the deformation performance of the frame. [Explanation of symbols]

[0133] 1: Anchor part 2:Fixed part 3:Connection part 4: Support part 5:Connection base 6:Through hole 7: Connection 8:Through hole 9: Base section 10: Joint metal fittings 11: Screw hole 12: Bis 14: Support plate 15: Intermediate plate 16: Support plate 17: Flange plate 18: Notch 19: Notch 20: Metal joints 30: Metal joints 31: Connecting anchor part 40: Metal joints 50: Metal joints 51: Basics 52: Foundation 53: Pillar 54: Beam 55: Notch 56: Bolt hole 57: Nut 58: Brace or structural plywood 60: Metal joints 61: Pin section 62: Mounting part 63: Plate material 64: Nut 70: Metal joints

Claims

1. an anchor portion which is a rod-shaped member and has one end supported by a first structural member provided on the structure; A fixing portion is provided on a surface of a second structural material that is a structural material different from the first structural material and is provided on the structure; A connecting base portion provided on the other end side of the anchor portion; A support portion protruding from the fixed portion; A connecting portion extending in a direction perpendicular to an axial direction of the anchor portion and connected to the connecting base portion and the support portion; Equipped with The connecting base has a through hole or a notch, the connecting portion is inserted into the through hole or the notch portion and fixed to the connecting base, One of the connecting portions is fixed to the support portion and is restricted in movement relative to the support portion in two opposite directions parallel to an axial direction of the anchor portion, the connecting portion is capable of absorbing energy by repeatedly increasing the amount of deformation through plastic deformation in a portion where the movement is not restrained in response to a load equal to or greater than a bending yield load or a shear yield load associated with a predetermined external force acting on the structure, A joining member that joins the first structural material and the second structural material via the anchor portion, the fixing portion, the connecting base portion, the support portion, and the connecting portion.

2. an anchor portion which is a rod-shaped member and has one end supported by a first structural member provided on the structure; A fixing portion is provided on a surface of a second structural material that is a structural material different from the first structural material and is provided on the structure; A connecting base portion provided on the other end side of the anchor portion; A support portion protruding from the fixed portion; A connecting portion extending in a direction perpendicular to an axial direction of the anchor portion and connected to the connecting base portion and the support portion; Equipped with The support portion has a through hole or a notch portion, the connecting portion is inserted into the through hole or the notch portion and fixed to the support portion, One of the connecting portions is fixed to the connecting base and is restricted in movement relative to the connecting base in two opposite directions parallel to an axial direction of the anchor portion, the connecting portion is capable of absorbing energy by repeatedly increasing the amount of deformation through plastic deformation in a portion where the movement is not restrained in response to a load equal to or greater than a bending yield load or a shear yield load associated with a predetermined external force acting on the structure, A joining member that joins the first structural material and the second structural material via the anchor portion, the fixing portion, the connecting base portion, the support portion, and the connecting portion.

3. an anchor portion which is a rod-shaped member and has one end supported by a first structural member provided on the structure; A fixing portion is provided on a surface of a second structural material that is a structural material different from the first structural material and is provided on the structure; A connecting base portion provided on the other end side of the anchor portion; A support portion protruding from the fixed portion; A connecting portion extending in a direction perpendicular to an axial direction of the anchor portion and connected to the connecting base portion and the support portion; Equipped with The connecting portion has a through hole having a female thread formed therein, The connecting base has a male thread formed on an upper portion of the anchor portion, The female thread of the connecting portion is engaged with the male thread of the connecting base, One of the connecting portions is fixed to the support portion and is restricted in movement relative to the support portion in two opposite directions parallel to an axial direction of the anchor portion, the connecting portion is capable of absorbing energy by repeatedly increasing the amount of deformation through plastic deformation in a portion where the movement is not restrained in response to a load equal to or greater than a bending yield load or a shear yield load associated with a predetermined external force acting on the structure, A joining member that joins the first structural material and the second structural material via the anchor portion, the fixing portion, the connecting base portion, the support portion, and the connecting portion.

4. The joint member according to claim 1 , wherein a bending yield load or a shear yield load of the connecting portion is smaller than a buckling load of the anchor portion.

5. The joining member according to claim 4 , wherein the fixing portion is configured such that bending yield does not occur when a bending yield load or a shear yield load acts on the connecting portion.

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