Joining structure

Abstract

To suppress reduction of rigidity and strength in a joint structure in which members are crossed.SOLUTION: A joint structure in which a first member having a first direction as a longitudinal direction and a second member having a second direction crossing the first direction as a longitudinal direction are joined, wherein the first member has a first cutout part on a side facing the second member in a third direction crossing the first direction and the second direction, the second member has a second cutout part that fits into the first cutout part on a side facing the first member in the third direction, and a first reinforcing plate disposed on a side of the first member not facing the second member in the third direction across the first member along the second direction and joined to the second member.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a joining structure.

Background Art

[0002] Patent Document 1 discloses a joining structure in which the end face of a beam faces the side face of a column and they are joined. Specifically, a pair of gusset plates along the side faces of the column and the beam are arranged across the joint of the column and the beam. Then, bolts inserted between the pair of gusset plates sandwiching the column and the beam are fastened to nuts, thereby joining the column and the beam.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] A joining structure in which the end face of one member (column) faces the side face of the other member (beam), as in Patent Document 1, cannot be adopted for a joining structure in which, for example, two beams intersect and are joined. As a method of joining two members by intersecting them, a notch joint is known. The notch joint is a method in which, as shown in FIGS. 10A and 10B, notch portions are formed on the opposing surfaces of two members, and the notch portions of each are fitted together for joining. However, in the case of a notch joint, cross-sectional losses of the two members occur at the joint. Therefore, the rigidity and load-bearing capacity with respect to the bending moment (in the case of two beams, the vertical bending moment) with the joint as the fulcrum are greatly reduced.

[0005] The present invention has been made in view of such circumstances, and an object thereof is to suppress a decrease in rigidity and load-bearing capacity in a joining structure in which members intersect.

Means for Solving the Problems

[0006] In order to achieve the above object, the present invention provides a joint structure in which a first member having a first direction as its longitudinal direction and a second member having a second direction intersecting the first direction as its longitudinal direction are joined. The first member has a first notch on the side facing the second member in a third direction intersecting the first direction and the second direction. The second member has a second notch that fits into the first notch on the side facing the first member in the third direction. In the third direction, on the side of the first member that does not face the second member, there is a first reinforcing plate that is disposed across the first member along the second direction and is joined to the second member. The length of the first reinforcing plate in the first direction is the same as the length of the second member in the first direction. This joint structure is characterized by this. Outside dimensions length is the same as the length of the second member in the first direction Outside dimensions This is a joint structure characterized by being the same length. Also, a first member having a horizontal first direction as its longitudinal direction and a second member having a horizontal second direction intersecting the first direction as its longitudinal direction are joined. The first member has a first notch on the side facing the second member in a third direction intersecting the first direction and the second direction. The second member has a second notch that fits into the first notch on the side facing the first member in the third direction. In the third direction, on the side of the first member that does not face the second member, there is a first reinforcing plate that is disposed across the first member along the second direction and is joined to the second member. This is a joint structure characterized by this. to form the first beam member with a first member having a horizontal first direction as its longitudinal direction and a second member having a horizontal second direction intersecting the first direction as its longitudinal direction to form the second beam member This is a joint structure characterized by this.

[0007] According to such a joint structure, while the first member and the second member are intersected and joined, at the joint (intersection), it is possible to suppress a decrease in the rigidity and strength of the second member with respect to the bending moment in the third direction.

[0008] It is desirable that such a joint structure has a third notch into which the first reinforcing plate fits on the side of the first member that does not face the second member in the third direction.

[0009] According to such a joining structure, the first reinforcing plate becomes less conspicuous, and the appearance of the joining structure can be improved.

[0010] Such a joining structure has a second reinforcing plate that is disposed across the second member along the first direction on the side of the second member that does not face the first member in the third direction and is joined to the first member. The length of the second reinforcing plate in the second direction Outside dimensions is desirably the same as the length of the first member in the second direction. Outside dimensions

[0011] According to such a joining structure, while the first member and the second member are joined so as to intersect, it is possible to suppress a decrease in the rigidity and strength of the first member with respect to the bending moment in the third direction at the joint (intersection).

[0014] Further, in order to achieve such an object, the present invention provides a first member having a first direction in the horizontal direction as a longitudinal direction to form the first beam member and a second member having a second direction in the horizontal direction that intersects the first direction as a longitudinal direction and that abuts on one surface of the first member in the second direction, and a third member having the second direction as a longitudinal direction and that abuts on the other surface of the first member in the second direction. The joining structure has a first reinforcing plate that is disposed across the first member along the second direction on one side of the first member in a third direction that intersects the first direction and the second direction and that is joined to the second member and the third member, and a second reinforcing plate that is disposed across the first member along the second direction on the other side of the first member in the third direction and that is joined to the second member and the third member. The length of the first reinforcing plate in the first direction to form the second beam member is the same as the length of the second member in the first direction and the length of the third member in the first direction, and the length of the second reinforcing plate in the first direction Outside dimensions is the same as the length of the second member in the first direction and the length of the third member in the first direction. Outside dimensions Outside dimensions Outside dimensions is the same as the length of the second member in the first direction and the length of the third member in the first direction. Outside dimensions Outside dimensions ​​​​It is a joining structure characterized by being the same length as the length.

[0015] According to such a joining structure, while crossing and joining the second member and the third member to the first member, at the joint (crossing part), a decrease in rigidity and strength against the bending moment in the third direction can be suppressed.

[0016] It is desirable that such a joining structure has a shear force transmission means for transmitting the shear force in the third direction between the second member and the third member through the first member.

[0017] According to such a joining structure, the shear force in the third direction can be mutually transmitted between the second member and the third member.

[0018] It is desirable that such a joining structure has, as the shear force transmission means, a gusset plate and a through member passing through the gusset plate, or a cotter and a groove.

[0019] According to such a joining structure, the shear force in the third direction can be mutually transmitted between the second member and the third member.

[0020] It is desirable that such a joining structure has, as the first reinforcing plate and the second reinforcing plate, materials formed of a material having a higher strength than that of the first member and the second member.

[0021] According to such a joining structure, at the crossing part of the first member and the second member, or at the crossing part of the first member, the second member, and the third member, a decrease in rigidity and strength against the bending moment in the third direction can be further suppressed.

Advantages of the Invention

[0022] According to the present invention, in a joining structure in which members are crossed, it is possible to suppress a decrease in rigidity and strength.

Brief Description of the Drawings

[0023]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0024] Hereinafter, a joining structure between beams using the joining structure according to the present invention will be described with reference to the drawings. In the joining structure described below, an X direction, a Y direction, and a Z direction that are orthogonal to each other are defined, and the Z direction is the vertical direction (third direction, vertical direction). Further, the joining structure described below joins a first beam member having the X direction (first direction, horizontal direction) as the longitudinal direction and a second beam member having the Y direction (second direction, horizontal direction) as the longitudinal direction by intersecting them. Before describing this embodiment, first, a comparative example will be described.

[0025] ===Joining Structure 3 of Comparative Example=== FIG. 10A is a perspective view showing the joining structure 3 of the comparative example. FIG. 10B is an exploded perspective view showing the configuration of the joining structure 3 of the comparative example.

[0026] In the joining structure 3 of the comparative example, a first beam member 80 having the X direction as the longitudinal direction and a second beam member 90 having the Y direction as the longitudinal direction are joined at a right angle. The first beam member 80 and the second beam member 90 (base materials) have the same dimensions and shapes in the cross-section cut in the vertical direction, and the cross-sectional shape is rectangular. In the comparative example, the building having the joining structure 3 is a wooden building, and the first beam member 80 and the second beam member 90 are wooden members.

[0027] The first beam member 80 and the second beam member 90 are joined by complementary notching. At the joint 3J, the first beam member 80 is disposed above the second beam member 90. Therefore, the first beam member 80 has a first notch portion 81 on the lower side facing the second beam member 90 in the vertical direction. The first notch portion 81 is a portion notched in a rectangular parallelepiped shape over the entire width of the lower surface of the first beam member 80 up to half of the beam depth D toward the upper side. The second beam member 90 has a second notch portion 91 on the upper side facing the first beam member 80 in the vertical direction. The second notch portion 91 is a portion notched in a rectangular parallelepiped shape over the entire width of the upper surface of the second beam member 90 up to half of the beam depth D toward the lower side.

[0028] The second notch portion 91 fits into the first notch portion 81, the second beam member 90 fits into the first notch portion 81, and the first beam member 80 fits into the second notch portion 91. Thereby, the first beam member 80 and the second beam member 90 are joined in a crossed manner. At the joint 3J, the first beam member 80 and the second beam member 90 may be fixed with an adhesive, nails, or the like.

[0029] However, in the case of complementary notching, cross-sectional losses occur in the first beam member 80 and the second beam member 90 at the joint 3J (crossing portion). Therefore, the rigidity and the shear strength of the joint 3J are greatly reduced with respect to the bending moment having the joint 3J of the first beam member 80 and the second beam member 90 as a fulcrum, specifically, the bending moment in the vertical direction which is the direction in which the first beam member 80 and the second beam member 90 cross. Due to the reduction in rigidity, the joint 3J may be deformed, or due to the reduction in shear strength, the joint 3J may be damaged.

[0030] Specifically, when the beam width of a beam (base material) with a rectangular cross-section is "b" and the beam depth (vertical length) is "D", the sectional secondary moment I representing the rigidity of the beam with respect to the bending moment in the vertical direction is "bD 3 / 12". In the joint 3J of the comparative example, since the first beam member 80 and the second beam member 90 are each notched by half of the beam depth D of the base material, each beam depth becomes "D / 2". Therefore, the sectional secondary moment I of each beam at the joint 3J is "b(D / 2) 3 / 12". Thus, in the joint structure 3 of the comparative example, the rigidity of the joint 3J is reduced by up to 1 / 8 (= 12.5%) compared to the joint structure in which the beams are joined without being notched.

[0031] Similarly, the section modulus Z representing the allowable stress of the beam (base material) with respect to the bending moment in the vertical direction is "bD 2 / 6". On the other hand, the section modulus Z of each beam at the stagger joint 3J is "b(D / 2) 2 / 6". Therefore, in the joint structure 3 of the comparative example, the allowable stress of the joint 3J is reduced by up to 1 / 4 (= 25%) compared to the joint structure in which the beams are joined without being notched.

[0032] Therefore, in the present embodiment, in a joint structure in which two members (here, two beams) are crossed, the purpose is to suppress a decrease in rigidity and allowable stress with respect to the bending moment in the direction (vertical direction) in which the two members cross with the joint as a fulcrum.

[0033] ===Joint structure 1 of the first embodiment=== FIG. 1 is a perspective view showing the joint structure 1 of the first embodiment. FIG. 2 is an exploded perspective view showing the configuration of the joint structure 1 of the first embodiment. FIG. 3A is an exploded side view of the joint structure 1 as viewed from the Y direction. FIG. 3B is a view for explaining the cross-section of the first reinforcing plate 31 and the second beam member 20 at the joint 1J. FIG. 4 is a view showing a graph examining the thicknesses of the first reinforcing plate 31 and the second reinforcing plate 32.

[0034] The joint structure 1 of the first embodiment includes a first beam member 10 (first member) having the X direction as its longitudinal direction, a second beam member 20 (second member) having the Y direction as its longitudinal direction, a first reinforcing plate 31 having the Y direction as its longitudinal direction, and a second reinforcing plate 32 having the X direction as its longitudinal direction. In the first embodiment, the building having the joint structure 1 is a wooden building, and the first beam member 10 and the second beam member 20 are wooden members.

[0035] The first beam member 10 and the second beam member 20 (base materials) have the same dimensions and shapes in the cross-section cut in the vertical direction, and the cross-sectional shape is rectangular. Also, the dimensions of the first reinforcing plate 31 and the dimensions of the second reinforcing plate 32 are the same. The width (length in the X direction) of the first reinforcing plate 31 and the width (length in the Y direction) of the second reinforcing plate 32 are the same length as the beam width b of the first beam member 10 and the second beam member 20.

[0036] Similar to the joint structure 3 of the comparative example, in the joint structure 1 of the first embodiment, the first beam member 10 and the second beam member 20 intersect at a right angle and are joined in a complementary manner. As shown in FIG. 2, at the joint portion 1J, the first beam member 10 is arranged above the second beam member 20.

[0037] The first beam member 10 has a first notch portion 11 on the lower side facing the second beam member 20 in the vertical direction. The first notch portion 11 is a portion that is notched upward across the entire width of the lower surface of the first beam member 10. Different from the first notch portion 81 of the comparative example, the first notch portion 11 of the first embodiment is long in the X direction and has a stepped shape with a step.

[0038] The central portion 111 of the first notch portion 11 in the X direction is a portion that is notched deeply (up to half of the beam depth D) upward. The central portion 111 of the first notch portion 11 is a portion where the second beam member 20 and the second reinforcing plate 32 are accommodated, and its length in the X direction is the same length as the beam width b of the second beam member 20.

[0039] At both ends 112 of the first notch 11 in the X direction, there is a space for the second reinforcing plate 32. Specifically, the parts of the second reinforcing plate 32 extending on both sides of the second beam member 20 in the X direction are received. Therefore, both ends 112 of the first notch 11 are portions that are notched shallowly (by the thickness of the second reinforcing plate 32) upward. Also, the length of the first notch 11 in the X direction as a whole is the same as the length L of the second reinforcing plate 32 in the X direction.

[0040] In addition, the first beam member 10 has a third notch 12 on the upper side that does not face the second beam member 20 in the vertical direction. The third notch 12 is a portion that is notched shallowly (by the thickness of the first reinforcing plate 31) downward across the entire width of the upper surface of the first beam member 10. The length of the third notch 12 in the X direction is the same as the width (length in the X direction) of the first reinforcing plate 31.

[0041] The second beam member 20 has a second notch 21 on the upper side that faces the first beam member 10 in the vertical direction. The second notch 21 is a portion that is notched downward across the entire width of the upper surface of the second beam member 20. The second notch 21 is long in the Y direction and has a stepped shape with steps.

[0042] The central portion 211 of the second notch 21 in the Y direction is a portion that is notched deeply (up to half of the beam depth D) downward. The central portion 211 of the second notch 21 is the portion where the first beam member 10 and the first reinforcing plate 31 are received, and its length in the Y direction is the same as the beam width b of the first beam member 10.

[0043] At both ends 212 of the second notch 21 in the Y direction, there is a space for the first reinforcing plate 31. Specifically, the parts of the first reinforcing plate 31 extending on both sides of the first beam member 10 in the Y direction are received. Therefore, both ends 212 of the second notch 21 are portions that are notched shallowly (by the thickness of the first reinforcing plate 31) downward. Also, the length of the second notch 21 in the Y direction as a whole is the same as the length L of the first reinforcing plate 31 in the Y direction.

[0044] Further, the second beam member 20 has a fourth notch portion 22 on the lower side that does not face the first beam member 10 in the vertical direction. The fourth notch portion 22 is a portion that is notched shallowly (by the thickness of the second reinforcing plate 32) upward across the entire width of the lower surface of the second beam member 20. The length of the fourth notch portion 22 in the Y direction is the same as the width (length in the Y direction) of the second reinforcing plate 32.

[0045] In the joining structure 1 of the first embodiment, the second notch portion 21 fits into the first notch portion 11, the second beam member 20 fits into the central portion 111 of the first notch portion 11, and the first beam member 10 fits into the central portion 211 of the second notch portion 21. Thereby, the first beam member 10 and the second beam member 20 are joined in a crosswise manner.

[0046] Furthermore, the first reinforcing plate 31 fits into the third notch portion 12 of the first beam member 10 and both end portions 212 of the second notch portion 21 of the second beam member 20, and the second reinforcing plate 32 fits into the fourth notch portion 22 of the second beam member 20 and both end portions 112 of the first notch portion 11 of the first beam member 10. At the joint portion 1J, the surfaces of the first beam member 10, the second beam member 20, the first reinforcing plate 31, and the second reinforcing plate 32 that are in contact with each other are fixed (joined) with an adhesive, nails, or the like.

[0047] In this way, in the joining structure 1 of the first embodiment, while the first beam member 10 and the second beam member 20 are joined in a mutually notched manner, the first reinforcing plate 31 is disposed across the first beam member 10 along the Y direction on the upper side of the first beam member 10 that does not face the second beam member 20. That is, the first reinforcing plate 31 straddles both ends of the joint portion 1J (i.e., both ends 10a and 10b of the first beam member 10) in the Y direction and extends outward from the first beam member 10 to both outer sides in the Y direction.

[0048] Moreover, the first reinforcing plate 31 is joined to the first beam member 10 and the second beam member 20 (note that the first reinforcing plate 31 and the first beam member 10 may not be joined). Thus, since the first reinforcing plate 31 and the second beam member 20, which have the Y direction as the longitudinal direction, are joined to each other, forces are transmitted between them. Therefore, the first reinforcing plate 31 can share with the second beam member 20 the compressive and tensile loads acting on the second beam member 20 due to the bending moment in the vertical direction. Further, the first reinforcing plate 31 is disposed at a position overlapping the second beam member 20 having a cross-sectional defect at the joint portion 1J. Therefore, the load acting on the portion of the second beam member 20 located at the joint portion 1J is shared by the first reinforcing plate 31. Thus, it is possible to suppress a decrease in the rigidity and the load-bearing capacity of the portion of the second beam member 20 located at the joint portion 1J with respect to the bending moment in the vertical direction.

[0049] In particular, in the first embodiment, the first reinforcing plate 31 is disposed so as to straddle the first beam member 10 in the Y direction and overlaps all of the portion of the second beam member 20 having a cross-sectional defect. Therefore, it is possible to suppress a decrease in the rigidity and the load-bearing capacity of the second beam member 20 over the entire area of the joint portion 1J in the Y direction.

[0050] Similarly, a second reinforcing plate 32 is disposed so as to straddle the second beam member 20 along the X direction on the lower side of the second beam member 20 that does not face the first beam member 10. That is, the second reinforcing plate 32 straddles both ends of the joint portion 1J (i.e., both ends of the second beam member 20) in the X direction and extends outward from the second beam member 20 in both outer sides in the X direction.

[0051] Moreover, the second reinforcing plate 32 is joined to the first beam member 10 and the second beam member 20 (it should be noted that the second reinforcing plate 32 and the second beam member 20 may not be joined). In this way, since the second reinforcing plate 32 with the X direction as the longitudinal direction and the first beam member 10 are joined to each other, forces are transmitted between them. Also, the second reinforcing plate 32 is disposed at a position overlapping the first beam member 10 that has a cross-sectional defect at the joint portion 1J. Therefore, the load (the load acting due to the bending moment in the vertical direction) acting on the portion of the first beam member 10 located at the joint portion 1J is shared by the second reinforcing plate 32. Thus, it is possible to suppress a decrease in the rigidity and the ultimate strength of the portion of the first beam member 10 located at the joint portion 1J with respect to the bending moment in the vertical direction.

[0052] In particular, in the first embodiment, the second reinforcing plate 32 is disposed so as to straddle the second beam member 20 in the X direction and overlaps with all of the portion of the first beam member 10 that has a cross-sectional defect. Therefore, it is possible to suppress a decrease in the rigidity and the ultimate strength of the first beam member 10 over the entire area of the joint portion 1J in the X direction.

[0053] As described above, according to the joint structure 1 of the first embodiment, even in the case of butt jointing, it is possible to suppress a decrease in the rigidity and the ultimate strength of the joint portion 1J. Also, the joint structure 1 of the first embodiment has both the first reinforcing plate 31 and the second reinforcing plate 32, but is not limited thereto. That is, a joint structure may be used that has only a reinforcing plate (the first reinforcing plate of the present invention) that reinforces either one of the first beam member 10 and the second beam member 20 (the second member of the present invention) and does not have a reinforcing plate (the second reinforcing plate of the present invention) that reinforces the other (the first member of the present invention).

[0054] Also, the first reinforcing plate 31 and the second reinforcing plate 32 are plate-like members having a thickness in the vertical direction. Therefore, for example, compared with the case where a sheet-like reinforcing member is attached to the joint portion 1J, the reinforcing effect is high, and it is possible to more reliably suppress a decrease in rigidity and ultimate strength.

[0055] For specific explanation, the second moment of area I and the section modulus Z with respect to the vertical bending moment of the second beam member 20 reinforced by the first reinforcing plate 31 are calculated. Here, the beam depth of the first beam member 10 and the second beam member 20 is set to "D = 1000 mm", and the beam width is set to "b". Also, the thickness of the first reinforcing plate 31 and the second reinforcing plate 32 is set to "t = 100 mm". In this case, the remaining beam depth of the first beam member 10 and the second beam member 20 at the joint 1J is "D j = 400 mm = (1000 - 100×2) / 2)".

[0056] First, the vertical centroid position e of the first reinforcing plate 31 and the second beam member 20 is obtained. As shown in Fig. 3B, the position of the upper surface of the first reinforcing plate 31 is set as the vertical reference position (origin O). The centroid position e, that is, the vertical distance h1 from the origin O to the centroid position e, is obtained by dividing the "sum value" of the "cross-sectional area" of each member × the "vertical distance from the origin O to the centroid position e1, e2 of each member" by the "sum value of the cross-sectional areas of each member". From the following formula, it is obtained that the position 570 mm (= h1) below the origin O is the centroid position e. h1 = {(bt×0.5t + bD j ×(t + D j + 0.5D j )} / (bt + bD j ) = {b(0.5t 2 + D j t + 1.5D j 2 )} / {b(t + D j )} = {0.5×100 2 + 400×100 + 1.5×400 2} / (100 + 400) = 570 mm

[0057] Next, the second moment of area I of the vertically separated first reinforcing plate 31 and second beam member 20 is obtained. Here, the vertical distance from the centroid position e1 of the first reinforcing plate 31 to the centroid position e of the two members is set as "h2 = 520 mm (= 570 - 100 / 2)", and the vertical distance from the centroid position e2 of the second beam member 20 to the centroid position e of the two members is set as "h3 = 130 mm (= 1000 - 570 - 100 - 400 / 2)". At this time, the second moment of area I of the first reinforcing plate 31 and the second beam member 20 is obtained by the following formula. I = bt 3 / 12 + bth2 2 + bD j 3 / 12 + bD j h3 2 = b(100 3 / 12 + 100×520 2 + 400 3 / 12 + 400×130 2 ) = b×39216.7 cm 4

[0058] On the other hand, the second moment of area I0 of the unnotched second beam member 20 (base material) is "bD 3 / 12". Substituting specific numerical values, we get "I0 = b×1000 3 / 12 = b×83333.3 cm 4 . Therefore, in the joining structure 1 of the first embodiment, the ratio of the rigidity of the joining structure in which the beam is joined without being notched is 47% (= (b×39216.7) / (b×83333.3)×100). Thus, compared with the joining structure 3 of the comparative example in which the rigidity decreases by up to 12.5%, the joining structure 1 of the first embodiment can suppress the decrease in rigidity.

[0059] Next, the section modulus Z of the vertically separated first reinforcing plate 31 and second beam member 20 is obtained. Here, the vertical distance from the centroid position e of the two members to the upper surface of the two members (the upper surface of the first reinforcing plate 31) is set to "h1 = 570 mm", and the vertical distance from the centroid position e of the two members to the lower surface of the two members (the lower surface of the second beam member 20) is set to "h4 = 330 mm (= 900 - 570)". At this time, the upper section modulus Zu and the lower section modulus Zl of the two members are obtained by the following formula. Zu = I / h1 = b × 39216.7 / 57 = b × 688.0 cm 3 Zl = I / h4 = b × 39216.7 / 33 = b × 1188.4 cm 3

[0060] On the other hand, the section modulus Z0 (section modulus of the upper and lower parts respectively) of the unnotched second beam member 20 (base material) is "bD 2 / 6". Substituting specific numerical values, we get "Z0 = b × 100 2 / 6 = b × 1666.7 cm 3 Thus, in the joining structure 1 of the first embodiment, the ratio of the load-bearing capacity to the joining structure in which the beam is joined without being notched is 41% (= (b × 688.0) / (b × 1666.7) × 100) to 71% (= (b × 1188.4) / (b × 1666.7) × 100). Therefore, compared with the joining structure 3 of the comparative example in which the load-bearing capacity is reduced by up to 25%, the joining structure 1 of the first embodiment can suppress the reduction of the load-bearing capacity. Note that the second reinforcing plate 32 and the first beam member 10 can be calculated in the same way, and the same results can be obtained.

[0061] Further, the first reinforcing plate 31 and the second reinforcing plate 32 may be made of the same material as the first beam member 10 and the second beam member 20, or may be made of different materials. However, by forming the first reinforcing plate 31 and the second reinforcing plate 32 from a material having a higher strength than the first beam member 10 and the second beam member 20, it is possible to further suppress a decrease in the rigidity and the yield strength of the joint portion 1J with respect to the bending moment in the vertical direction. The material having a higher strength is a material in which at least one of the Young's modulus with respect to bending and the allowable bending stress is greater than that of the materials of the first beam member 10 and the second beam member 20.

[0062] For example, when cedar is used for the first beam member 10 and the second beam member 20, it is preferable to use cypress or larch, which has a higher strength than cedar, for the first reinforcing plate 31 and the second reinforcing plate 32. Alternatively, a metal member having a higher strength than a wooden member may be used for the first reinforcing plate 31 and the second reinforcing plate 32. By doing so, it is possible to further suppress a decrease in the rigidity and the yield strength of the joint portion 1J. However, by using the same wooden members for the first reinforcing plate 31 and the second reinforcing plate 32 as the first beam member 10 and the second beam member 20, the first reinforcing plate 31 and the second reinforcing plate 32 are less conspicuous, and the appearance of the joint structure 1 can be improved.

[0063] Further, for example, when the first reinforcing plate 31 is made of a stronger material than the second beam member 20 and the Young's modulus of the first reinforcing plate 31 is large, the reinforcing effect can be confirmed by obtaining the second moment of area I and the section modulus Z assuming that the width of the first reinforcing plate 31 is wide. For example, when the Young's modulus of the first reinforcing plate 31 is α times that of the Young's modulus E of the second beam member 20, the width of the first reinforcing plate 31 is considered as "αb", which is α times the actual width b. Then, the vertical distance h1 from the origin O to the centroid position e of the two members is given by the following equation. h1={(αb×t×0.5t+bD j ×(t+D j +0.5D j )} / (αbt+bD j )

[0064] Then, the second moment of inertia I’ and the section moduli Zu’ and Zl’ are given by the following equations. From these equations, it can be seen that when the materials of the first reinforcing plate 31 and the second beam member 20 are the same, using a material with a larger Young's modulus for the first reinforcing plate 31 can suppress the decrease in rigidity (I’>I) and yield strength (Zu’>Zu, Zl’>Zl). In the following equations, strictly speaking, since the centroid position e of the two members changes, h1 to h4 also change, but they are denoted by the same symbols. I’=αbt 3 / 12+αbth2 2 +bD j 3 / 12+bD j h3 2 I’>I=bt 3 / 12+bth2 2 +bD j 3 / 12+bD j h3 2 Zu’=I’ / h1>Zu Zl’=I’ / h4>Zl

[0065] Also, the allowable bending moment M is obtained by multiplying the allowable bending stress F of the material by the section modulus Z (M = F×Z). Therefore, when the first reinforcing plate 31 is made of a stronger material than the second beam member 20 and the allowable bending stress F of the first reinforcing plate 31 is large, the allowable bending moment M increases, and it can be seen that the decrease in yield strength can be further suppressed.

[0066] In addition, the first beam member 10 has a third notch portion 12 in which the first reinforcing plate 31 is fitted on the upper side that does not face the second beam member 20 in the vertical direction. Also, the second notch portion 21 provided in the upper part of the second beam member 20 is also notched into a shape (step shape) in which the first reinforcing plate 31 can fit. Therefore, since the first reinforcing plate 31 does not protrude upward from the upper surface of the first beam member 10, or the protruding portion becomes small, the first reinforcing plate 31 is less conspicuous, and the appearance of the joint structure 1 can be improved.

[0067] Similarly, the second beam member 10 has a fourth notch portion 22 into which the second reinforcing plate 32 is fitted on the lower side that does not face the first beam member 10 in the vertical direction. Further, the first notch portion 11 provided at the lower portion of the first beam member 10 is also notched into a shape (step shape) in which the second reinforcing plate 32 can be accommodated. Therefore, since the second reinforcing plate 32 does not protrude downward from the lower surface of the second beam member 20, or the protruding portion becomes small, the second reinforcing plate 32 is less conspicuous, and the appearance of the joining structure 1 can be improved.

[0068] In particular, in the first embodiment, the depths of the notch portions 11, 12, 21, and 22 are adjusted so that the upper surface of the first beam member 10 and the upper surface of the first reinforcing plate 31 are flush, and the lower surface of the second beam member 20 and the lower surface of the second reinforcing plate 32 are flush. Therefore, the appearance of the joining structure 1 can be further improved.

[0069] However, it is not limited to the above. The joining structure 1 may not have one or both of the third notch portion 12 and the fourth notch portion 22, or only a part of the thickness of the first reinforcing plate 31 may be accommodated in the first beam member 10, or only a part of the thickness of the second reinforcing plate 32 may be accommodated in the second beam member 20.

[0070] Also, the widths of the first reinforcing plate 31 and the second reinforcing plate 32 are the same as the width b of the first beam member 10 and the second beam member 20. Therefore, the first reinforcing plate 31 and the second reinforcing plate 32 do not protrude in the Y direction or the X direction, and the appearance of the joining structure 1 can be improved.

[0071] Further, by increasing the thickness t (length in the vertical direction) of the first reinforcing plate 31 and the second reinforcing plate 32, the reinforcing effect of the first reinforcing plate 31 and the second reinforcing plate 32 against the bending moment in the vertical direction is enhanced. However, when the third notch portion 12 and the fourth notch portion 22 for accommodating the first reinforcing plate 31 and the second reinforcing plate 32 are provided in the first beam member 10 and the second beam member 20, as the thickness t of the first reinforcing plate 31 and the second reinforcing plate 32 increases, the remaining cross-sectional area (remaining ratio of the beam cross-section D) of the first beam member 10 and the second beam member 20 decreases.

[0072] Therefore, it is advisable to calculate the reinforcement effect when changing the ratio (t / D) of the thickness t of the first reinforcing plate 31 and the second reinforcing plate 32 with respect to the beam formation D, and determine the optimal thickness t. The reinforcement effect is the ratio (I / I0, Z / Z0) of the second moment of area I and the section modulus Z in the case where the first reinforcing plate 31 and the second reinforcing plate 32 are provided, with respect to the second moment of area I0 and the section modulus Z0 of the unnotched first beam member 10 and second beam member 20 (base material). The results are shown in the graph of FIG. 4.

[0073] From the results of the graph of FIG. 4, it can be seen that the upper section modulus Zu increases as the plate thickness t increases because the centroid position e rises (because h1 decreases). On the other hand, the second moment of area I and the lower section modulus Zl increase when the plate thickness t is in the range of 0.125D to 0.15D. Also, if the plate thickness t is made too large, the shear strength of the first beam member 10 and the second beam member 20 will also decrease. Therefore, it is advisable to adopt the thickness t of the first reinforcing plate 31 and the second reinforcing plate 32 such that the ratio of the plate thickness t to the beam formation D is about 0.125 to 0.15.

[0074] Also, the lower surface of the first reinforcing plate 31 and the upper surface of the second reinforcing plate 32 are respectively joined to the first beam member 10 and the second beam member 20 (in the first embodiment, they are joined and fixed with an adhesive). This joining should be set so that it does not peel off until the first reinforcing plate 31 and the second reinforcing plate 32 are broken by the tensile load acting on the first reinforcing plate 31 and the second reinforcing plate 32. For example, a tensile load in the Y direction acts on the first reinforcing plate 31. Therefore, the joining strength of the lower surface of the first reinforcing plate 31 should be made greater than the allowable stress of the first reinforcing plate 31 against tensile stress in the Y direction.

[0075] Specifically, when the lower surface of the first reinforcing plate 31 is joined with an adhesive, the joining strength of the lower surface of the first reinforcing plate 31 is obtained by multiplying the shear strength σ a of the adhesive by the area (b×L) of the lower surface of the first reinforcing plate 31. When the lower surface of the first reinforcing plate 31 is joined with nails, the joining strength of the lower surface of the first reinforcing plate 31 is the shear strength σ bIt is obtained by multiplying the number of nails n. On the other hand, the allowable stress of the first reinforcing plate 31 against the tensile force in the Y direction is the tensile strength f of the first reinforcing plate 31 in the Y direction a It is obtained by multiplying the cross-sectional area A (= b × t) of the first reinforcing plate 31 in the Y direction. Therefore, it is preferable to satisfy the following equation σ a × b × L > f a × A σ b × n > f a × A

[0076] Therefore, it is preferable to determine the length L of the first reinforcing plate 31, the type of the adhesive or nails, and the material of the first reinforcing plate 31. Further, when joining the first reinforcing plate 31 with nails, the length L of the first reinforcing plate 31 may be determined based on the required number of nails n and the arrangement (pitch, etc.) of the nails. The same applies to the second reinforcing plate 32

[0077] ===Joint structure 2 of the second embodiment=== FIG. 5 is a perspective view showing the joint structure 2 of the second embodiment. FIG. 6 is an exploded perspective view showing the configuration of the joint structure 2 of the second embodiment. FIGS. 7 and 8 are diagrams for explaining the shear force transmission means 60 and 70. FIG. 9 is a diagram showing a graph examining the thicknesses of the first reinforcing plate 31 and the second reinforcing plate 32

[0078] The joint structure 2 of the second embodiment includes a first beam member 40 (first member) having the X direction as the longitudinal direction, a second beam member 50 having the Y direction as the longitudinal direction, a first reinforcing plate 31 and a second reinforcing plate 32 having the Y direction as the longitudinal direction. In the second embodiment, the building having the joint structure 2 is a wooden building, and the first beam member 40 and the second beam member 50 are wooden members

[0079] The first beam member 40 and the second beam member 50 (base material) have the same dimensions and shapes of the cross-sections cut in the vertical direction, and the cross-sectional shape is rectangular. Also, the dimensions of the first reinforcing plate 31 and the dimensions of the second reinforcing plate 32 are the same. The widths (lengths in the X direction) of the first reinforcing plate 31 and the second reinforcing plate 32 are the same as the beam width b of the first beam member 40 and the second beam member 50

[0080] Unlike the butt joint, in the joining structure 2 of the second embodiment, the second beam member 50 is divided at the joint portion 2J, and the first beam member 40 is passed through the divided portion, so that the first beam member 40 and the second beam member 50 are joined at a right angle. In the following description, one of the divided portions of the second beam member 50 is referred to as the first divided member 51, and the other is referred to as the second divided member 52.

[0081] The first divided member 51 (the second member) has the Y direction as the longitudinal direction and abuts on one surface of the first beam member 40 in the Y direction. The second divided member 52 (the third member) has the Y direction as the longitudinal direction and abuts on the other surface of the first beam member 40 in the Y direction.

[0082] The first beam member 40 has a first notch portion 41 in which the first reinforcing plate 31 is received and a second notch portion 42 in which the second reinforcing plate 32 is received. The first notch portion 41 is a portion that extends across the entire width of the upper surface of the first beam member 40 and is notched shallowly (by the thickness of the first reinforcing plate 31) downward. The second notch portion 42 is a portion that extends across the entire width of the lower surface of the first beam member 40 and is notched shallowly (by the thickness of the second reinforcing plate 32) upward. The length of the first notch portion 41 and the second notch portion 42 in the X direction is the same as the width b of the first reinforcing plate 31 and the second reinforcing plate 32.

[0083] Also, the first divided member 51 and the second divided member 52, which are the second beam member 50, each have a third notch portion 53 in which the first reinforcing plate 31 is received and a fourth notch portion 54 in which the second reinforcing plate 32 is received. The third notch portion 53 is a portion that extends across the entire width of the upper surface of the first divided member 51 and the second divided member 52 and is notched shallowly (by the thickness of the first reinforcing plate 31) downward. The fourth notch portion 54 is a portion that extends across the entire width of the lower surface of the first divided member 51 and the second divided member 52 and is notched shallowly (by the thickness of the second reinforcing plate 32) upward.

[0084] In the joining structure 2 of the second embodiment, the central portion of the first reinforcing plate 31 in the Y direction is received in the first notch portion 41 of the first beam member 40, and both end portions of the first reinforcing plate 31 in the Y direction are received in the third notch portion 53 of the first dividing member 51 and the second dividing member 52. Similarly, the central portion of the second reinforcing plate 32 in the Y direction is received in the second notch portion 42 of the first beam member 40, and both end portions of the second reinforcing plate 32 in the Y direction are received in the fourth notch portion 54 of the first dividing member 51 and the second dividing member 52. And the mutually contacting surfaces of the first beam member 40, the first dividing member 51, the second dividing member 52, the first reinforcing plate 31, and the second reinforcing plate 32 are fixed (joined) with an adhesive, nails, or the like.

[0085] As described above, in the joining structure 2 of the second embodiment, the first reinforcing plate 31 and the second reinforcing plate 32 are arranged along the Y direction across the first beam member 40 above and below the first beam member 40 and the second beam member 50. And the first reinforcing plate 31 and the second reinforcing plate 32 are respectively joined to the first beam member 40, the first dividing member 51, and the second dividing member 52. That is, the first reinforcing plate 31 and the second reinforcing plate 32 extend to both outer sides of the first beam member 40 in the Y direction and are joined to the first dividing member 51 and the second dividing member 52, and serve to integrate the first dividing member 51 and the second dividing member 52. Therefore, the compressive tensile loads acting on the first dividing member 51 and the second dividing member 52 due to the bending moment in the vertical direction are transmitted to each other via the first reinforcing plate 31 and the second reinforcing plate 32. Note that the first beam member 40 may not be joined to the first dividing member 51 and the second dividing member 52.

[0086] Also, the first reinforcing plate 31 and the second reinforcing plate 32 themselves can also share the compressive tensile loads acting on the first dividing member 51 and the second dividing member 52. Therefore, although the second beam member 50 is divided at the joint portion 2J, the first reinforcing plate 31 and the second reinforcing plate 32 can counteract the bending moment in the vertical direction acting on the second beam member 50, and can suppress a decrease in the rigidity and load-bearing capacity of the joint portion 2J.

[0087] On the other hand, the first beam member 40 is notched by a thickness of 2t of the first reinforcing plate 31 and the second reinforcing plate 32 at the joint portion 2J. Therefore, compared with the case where half of the beam formation D is notched as in the joint structure 3 of the comparative example, the cross-sectional loss is small. Thus, it is possible to suppress a decrease in rigidity and load-bearing capacity with respect to the bending moment in the vertical direction of the portion of the first beam member 40 located at the joint portion 2J.

[0088] For specific description, the beam formation of the first beam member 40 and the second beam member 50 is set to "D = 1000 mm", and the beam width is set to "b". Further, the thickness of the first reinforcing plate 31 and the second reinforcing plate 32 is set to "t = 100 mm". In this case, the second moment of area I and the section modulus Z of the second beam member 50 connected only by the first reinforcing plate 31 and the second reinforcing plate 32 at the joint portion 2J can be obtained by the following equations. I = bD 3 / 12 - b(D - 2t) 3 / 12 = b(1000 3 - 800 3 ) / 12 = b × 40666.7 cm 4 Z = bD 2 / 6 - b(D - 2t) 2 / 6 = b(1000 2 - 800 2 ) / 6 = b × 600 cm 3

[0089] On the other hand, the second moment of area I0 of the second beam member 50 (base material) that is not segmented is "bD 3 / 12 = b × 1000 3 / 12 = b × 83333.3 cm 4 ". Therefore, in the joint structure 2 of the second embodiment, the ratio of the rigidity with respect to the joint structure in which the beam is joined without being notched is 49% (= (b × 40666.7) / (b × 83333.3) × 100 = 48.8). Further, the section moduli Z0 of the upper and lower portions of the second beam member 50 (base material) that is not segmented are "bD 2 / 6 = b × 1666.7 cm 3It becomes "」. Therefore, in the joining structure 2 of the second embodiment, the ratio of the shear strength with respect to the joining structure in which the beam is joined without being notched is 36% (=(b×600) / (b×1666.7)×100 = 35.9). Thus, compared with the joining structure 3 of the comparative example in which the rigidity decreases by up to 12.5% and the shear strength decreases by up to 25%, the second beam member 50 (rigidity: 49%, shear strength: 36%) in the joint 2J of the second embodiment can suppress the decrease in rigidity and shear strength.

[0090] Also, in the joint 2J, the second moment of area I and the section modulus Z of the first beam member 40 notched by the thicknesses of the first reinforcing plate 31 and the second reinforcing plate 32 are obtained by the following equations. I = b(D - 2t) 3 / 12 = b×800 3 / 12 = b×42666.6 cm 4 Z = b(D - 2t) 2 / 6 = b×800 2 / 6 = b×1066.6 cm 3

[0091] Therefore, in the first beam member 40 of the joining structure 2 of the second embodiment, the ratio of the rigidity is 51% (=(b×42666.6) / (b×83333.3)×100 = 51.2), and the ratio of the shear strength is 64% (=(b×1066.6) / (b×1666.7)×100 = 63.9) with respect to the joining structure in which the beam is joined without being notched. Thus, compared with the joining structure 3 of the comparative example in which the rigidity decreases by up to 12.5% and the shear strength decreases by up to 25%, the first beam member 40 (rigidity: 51%, shear strength: 64%) in the joint 2J of the second embodiment can suppress the decrease in rigidity and shear strength.

[0092] Further, the first reinforcing plate 31 and the second reinforcing plate 32 may be made of the same material as the first beam member 40 and the second beam member 50, or may be made of different materials. However, by forming the first reinforcing plate 31 and the second reinforcing plate 32 from a material having a higher strength than the first beam member 40 and the second beam member 50, it is possible to further suppress a decrease in the rigidity and the yield strength of the joint portion 2J with respect to the bending moment in the vertical direction.

[0093] Also, in the case of the joint structure 2 of the second embodiment, if the first divided member 51 and the second divided member 52 are joined only by the first reinforcing plate 31 and the second reinforcing plate 32, a shearing force in the vertical direction is not transmitted between the first divided member 51 and the second divided member 52. Therefore, as shown in FIGS. 7 and 8, it is desirable that the joint structure 2 of the second embodiment includes shearing force transmission means 60 and 70 for transmitting the shearing force in the vertical direction between the first divided member 51 and the second divided member 52 via the first beam member 40.

[0094] The shearing force transmission means 60 shown in FIG. 7 includes a pair of gusset plates 61 and a through member that penetrates the gusset plates. The through member is a drift pin 62 (round steel). The gusset plate 61 is a plate having a T-shaped cross section (a fitting for insertion into a beam), and its flange portion is attached to the first beam member 40. Also, gusset plates 61 are attached to both surfaces of the first beam member 10 in the Y direction. In FIG. 7, bolts and the like for attaching the gusset plate 61 to the first beam member 40 are omitted. Further, the web portion of the gusset plate 61 protrudes from the first beam member 40 in the Y direction and has a plurality of through holes 611 for inserting the drift pin 62 in the X direction.

[0095] On the other hand, slits 511 for inserting the gusset plate 61 are provided at the ends of the first divided member 51 and the second divided member 52 (not shown in FIG. 7) that contact the first beam member 40 in the Y direction. Further, a plurality of through holes 512 for inserting the drift pin 62 in the X direction are provided at the ends.

[0096] In the joining structure 2, a plurality of drift pins 62 are inserted along the X direction through the through holes 512 of the first dividing member 51 or the second dividing member 52 and the through holes 611 of the gasket plate 61 inserted into the slits 511. In this way, the vertical movement of the first dividing member 51 and the first beam member 40 is restricted, and the vertical movement of the second dividing member 52 and the first beam member 40 is restricted.

[0097] As a result, the vertical shear force is transmitted between the first dividing member 51 and the first beam member 40, and the vertical shear force is transmitted between the first beam member 40 and the second dividing member 52. Therefore, the vertical shear force is also transmitted between the first dividing member 51 and the second dividing member 52 via the first beam member 40. Note that the shear force transmission means 60 illustrated in FIG. 7 is an example and is not limited thereto. For example, the gasket plate 60 may be attached to the second beam member 50 side. Further, the penetrating member passing through the gasket plate 61 is a bolt, and the bolt may be fixed with a nut.

[0098] Further, the shear force transmission means 70 shown in FIG. 8 includes a cotter 71 and a groove portion 72. A cotter 71 (protrusion portion) protruding toward the first beam member 40 is provided on the contact surface of the first dividing member 51 and the second dividing member 52 (not shown in FIG. 8) with the first beam member 40 in the Y direction. On the other hand, groove portions 72 into which the cotter 71 fits are provided on both surfaces of the first beam member 40 in the Y direction. In the joining structure 2, the cotter 71 fits into the groove portion 72 and is joined and fixed with an adhesive or the like.

[0099] As a result, the vertical shear force is transmitted between the first dividing member 51 and the first beam member 40, and the vertical shear force is transmitted between the first beam member 40 and the second dividing member 52. Therefore, the vertical shear force is also transmitted between the first dividing member 51 and the second dividing member 52 via the first beam member 40. Note that the shear force transmission means 70 illustrated in FIG. 8 is an example. For example, the cotter 71 may be provided on the first beam member 40 side. Further, the shape and number of the cotter 71 are not limited to those shown in FIG. 8.

[0100] In addition, notches 41, 42, 53, 54 for accommodating the first reinforcing plate 31 and the second reinforcing plate 32 are provided in the upper and lower portions of the first beam member 40 and the second beam member 50 (the first divided member 51 and the second divided member 52). Therefore, the first reinforcing plate 31 does not protrude upward from the upper surfaces of the first beam member 40 and the second beam member 50, or the protruding portion is small, and the second reinforcing plate 32 does not protrude downward from the lower surfaces of the first beam member 40 and the second beam member 50, or the protruding portion is small. Thus, the first reinforcing plate 31 and the second reinforcing plate 32 are less conspicuous, and the appearance of the joining structure 2 can be improved.

[0101] Particularly, in the second embodiment, the depths of the notches 41, 42, 53, 54 are adjusted so that the upper surfaces of the first beam member 40 and the second beam member 50 and the upper surface of the first reinforcing plate 31 are flush, and the lower surfaces of the first beam member 40 and the second beam member 50 and the lower surface of the second reinforcing plate 32 are flush. Therefore, the appearance of the joining structure 2 can be further improved. However, it is not limited to the above. The joining structure 2 may not have some or all of the first notches 41 to the fourth notches 54, or only a part of the thicknesses of the first reinforcing plate 31 and the second reinforcing plate 32 may fit into the notches 41, 42, 53, 54.

[0102] Also, the widths of the first reinforcing plate 31 and the second reinforcing plate 32 are the same as the width b of the first beam member 40 and the second beam member 50. Therefore, the first reinforcing plate 31 and the second reinforcing plate 32 do not protrude in the Y direction or the X direction, and the appearance of the joining structure 2 can be further improved.

[0103] Also, Fig. 9 shows the change in the reinforcement effect (the ratio of the second moment of area I and the section modulus Z of the second embodiment to the second moment of area I0 and the section modulus Z0 of the base material, I / I0, Z / Z0) when the ratio (t / D) of the thickness t of the first reinforcement plate 31 and the second reinforcement plate 32 to the beam depth D of the first beam member 40 and the second beam member 50 is changed. In the case of the joint structure 2 of the second embodiment, the reinforcement effect of the second beam member 50 increases as the thickness t of the first reinforcement plate 31 and the second reinforcement plate 32 increases. On the other hand, for the first beam member 40, as the plate thickness t increases, the depth of the cutouts 41, 42 becomes deeper, so the reinforcement effect decreases. Therefore, the thickness t of the first reinforcement plate 31 and the second reinforcement plate 32 may be determined according to the desired reinforcement effect.

[0104] ===Other Embodiments=== As described above, the above embodiments are for facilitating the understanding of the present invention and are not for limiting the interpretation of the present invention. It goes without saying that the present invention can be changed and improved without departing from its gist, and equivalents thereof are included in the present invention.

[0105] In the above embodiment, the joint structure between the beams with the first member and the second member (the third member) as beams is exemplified, but it is not limited thereto, and the joint structure according to the present invention may be a joint structure between a column and a beam. Also, in the above embodiment, the first member and the second member (the third member) are exemplified as wooden members, but it is not limited thereto, and they may be metal members. Further, in the above embodiment, the first beam member and the second beam member are members of the same shape with the same dimensions, but they may be different members. Also, the dimensions of the first reinforcement plate and the second reinforcement plate may be different. Further, the first member and the second member (the third member) may intersect at an angle other than a right angle.

Explanation of Reference Numerals

[0106] 1 (joint structure of the first embodiment), 10 First beam member (first member), 11 First cutout, 12 Third cutout, 20 Second beam member (second member) 21 Second cutout, 22 Fourth cutout, 31 First reinforcing plate, 32 Second reinforcing plate, 2 (Joint structure of the second embodiment) 40 First beam member (first member), 41 First notch, 42 Second notch, 50 Second beam member, 51 First dividing member (second member), 52 Second dividing member (third member), 53 Third notch, 54 Fourth notch, 60 Shearing force transmission means, 61 Gusset plate, 62 Drift pin (penetrating member), 70 Shearing force transmission means, 71 Cotter, 72 Groove portion, 3 (Joint structure of the comparative example), 80 First beam member, 90 Second beam member,

Claims

1. A first member having a first direction as its longitudinal direction, and A second member having a second direction intersecting the first direction as its longitudinal direction are joined together, and the joining structure is such that The first member has a first notch portion on the side facing the second member in a third direction intersecting the first direction and the second direction, The second member has a second notch portion that fits into the first notch portion on the side facing the first member in the third direction, In the third direction, on the side of the first member that does not face the second member, there is a first reinforcing plate that is disposed across the first member along the second direction and is joined to the second member, A joining structure, wherein an outer dimension length of the first reinforcing plate in the first direction is the same as an outer dimension length of the second member in the first direction.

2. A first member constituting a first beam member with a first direction forming a horizontal direction as its longitudinal direction, and A second member constituting a second beam member with a second direction that is horizontal and intersects the first direction as its longitudinal direction are joined together, and the joining structure is such that The first member has a first notch portion on the side facing the second member in a third direction intersecting the first direction and the second direction, The second member has a second notch portion that fits into the first notch portion on the side facing the first member in the third direction, A joining structure, wherein in the third direction, on the side of the first member that does not face the second member, there is a first reinforcing plate that is disposed across the first member along the second direction and is joined to the second member.

3. The joining structure according to claim 1 or 2, wherein The first member has a third notch portion into which the first reinforcing plate fits on the side not facing the second member in the third direction.

4. The joining structure according to any one of claims 1 to 3, wherein In the third direction, on the side of the second member that does not face the first member, there is a second reinforcing plate that is disposed across the second member along the first direction and is joined to the first member, A joining structure, wherein an outer dimension length of the second reinforcing plate in the second direction is the same as an outer dimension length of the first member in the second direction.

5. A first member constituting a first beam member with a first direction forming a horizontal direction as its longitudinal direction, and A second beam member is formed with a horizontal direction and a second direction intersecting the first direction as its longitudinal direction, and a second member that abuts against one side surface of the first member in the second direction, a joining structure in which a third member having the second direction as its longitudinal direction and abutting against the other side surface of the first member in the second direction are joined, a first reinforcing plate disposed across the first member along the second direction on one side of the first member in a third direction intersecting the first direction and the second direction, and joined to the second member and the third member, a second reinforcing plate disposed across the first member along the second direction on the other side of the first member in the third direction, and joined to the second member and the third member, wherein an outer dimension length of the first reinforcing plate in the first direction is the same as an outer dimension length of the second member in the first direction and an outer dimension length of the third member in the first direction, and an outer dimension length of the second reinforcing plate in the first direction is the same as an outer dimension length of the second member in the first direction and an outer dimension length of the third member in the first direction. A joining structure characterized by this.

6. The joining structure according to claim 5, characterized by having shear force transmission means for transmitting a shear force in the third direction between the second member and the third member through the first member.

7. The joining structure according to claim 6, wherein the shear force transmission means is a gusset plate and a through member passing through the gusset plate, or a cotter and a groove portion. A joining structure characterized by this.

8. The joining structure according to any one of claims 4 to 7, wherein the first reinforcing plate and the second reinforcing plate are formed of a material having a higher strength than the first member and the second member. A joining structure characterized by this.

Images