Joint structure

Abstract

To provide a joint structure or the like that can realize ease of construction and aesthetics as much as possible while ensuring rigidity and strength at the joint between a wooden pillar and a wooden beam. [Solution] The joint structure joins a wooden column 2 and a wooden beam 3. In the joint structure, a through hole 21 is provided in the wooden column 2, penetrating the wooden column 2 in the beam axis direction of the wooden beam 3, and a joint piece of wood 5 is provided to fill the through hole 21. A vertical steel plate 4 is fixed to the joint piece of wood 5 within the through hole 21, and the steel plate 4 protrudes from the through hole 21 to the outside of the wooden column 2 and is inserted into the wooden beam 3. The steel plate 4 inserted into the wooden beam 3 is fixed to the wooden beam 3.

Description

[Technical Field]

[0001] The present invention relates to a joint structure between a wooden column and a wooden beam. [Background technology]

[0002] Timber structures are not only aesthetically pleasing, but are also effective as a means of reducing CO2 emissions from the perspective of global warming countermeasures. In particular, in recent years, with the spread of large-scale laminated timber, timber structures have begun to be applied to large-scale buildings.

[0003] A typical wooden structure is a wooden rigid frame, which combines wooden columns and wooden beams in a portal shape. Because wood has the property of being highly rigid and strong in the direction of the grain, but weak in the direction perpendicular to the grain, the grain direction is often oriented vertically in wooden columns, and the grain direction is often oriented along the beam axis in wooden beams.

[0004] However, when a wooden beam is joined to the side of a wooden column, the load in the beam axis direction of the wooden beam is applied at the column-beam joint in the direction perpendicular to the grain of the wooden column, resulting in low rigidity and insufficient strength of the wooden column in that direction.The lack of rigidity and strength at the column-beam joint makes it difficult to ensure the rigidity and strength required for a building in a wooden rigid frame.

[0005] Therefore, as a method for improving the rigidity and strength of wooden rigid frame structures, Patent Documents 1 and 2 describe using RC (reinforced concrete) construction or S (steel frame) construction for the column-beam joints in wooden rigid frame structures. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 2018-123628 [Patent Document 2] Japanese Patent Application Publication No. 2023-23189 Summary of the Invention [Problem to be solved by the invention]

[0007] As in Patent Documents 1 and 2, if reinforced concrete or steel construction is used for the column-beam joints, other construction methods other than woodwork will be mixed in, which increases the amount of work required to coordinate schedules with other construction methods. In addition, the mixture of wooden materials and other materials will create problems in terms of aesthetics.

[0008] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a joint structure etc. that can achieve ease of construction and aesthetics as much as possible while ensuring rigidity and strength at the joint between a wooden column and a wooden beam. [Means for solving the problem]

[0009] The first invention for solving the above problem is a joint structure between a wooden column and a wooden beam, characterized in that the wooden column has an open hollow portion on its side, a joint piece of wood is provided to fill the hollow portion, a vertical steel plate is fixed to the joint piece of wood within the hollow portion, the steel plate protrudes from the hollow portion to the outside of the wooden column and is inserted into the wooden beam, and the steel plate inserted into the wooden beam is fixed to the wooden beam.

[0010] In the first invention, a wooden joint is installed to fill the hollow part of the wooden column, and a vertical steel plate fixed to the wooden joint is fixed to the wooden beam, thereby ensuring the rigidity and strength of the column-beam joint. In addition, the first invention has a simple structure for the column-beam joint using a wooden joint and a steel plate, which makes construction easy and also achieves a beautiful appearance as much as possible.

[0011] The second invention is a joint structure between a wooden column and a wooden beam, wherein the wooden column has an open hollow portion on the side thereof, a joint piece of wood is provided to fill the hollow portion, the wooden beam is joined to the joint piece of wood, and the compressive strength and rigidity of the wooden beam in the beam axis direction per unit area of ​​the joint piece of wood are higher than the compressive strength and rigidity of the wooden column in the beam axis direction per unit area. In the first invention, it is also desirable that the compressive strength and rigidity of the wooden beam in the beam axis direction per unit area of ​​the joint wood be higher than the compressive strength and rigidity of the wooden column in the beam axis direction per unit area.

[0012] In this way, the compressive strength and rigidity of the wooden joint wood, which is installed to fill the hollow part of the wooden column, in the beam axis direction is made higher than the compressive strength and rigidity of the wooden column in the beam axis direction, thereby ensuring the rigidity and strength of the column-beam joint. In the second invention, the column-beam joint can be constructed mainly from wooden materials, so there is almost no need for other types of work, making it possible to achieve ease of construction and a beautiful appearance as much as possible.

[0013] It is desirable that the wooden column has a structure in which multiple layers of plank-shaped wooden material are stacked in the beam axis direction and the layers are fixed together with adhesive, and that the joint wood has a structure in which multiple layers of plank-shaped wooden material are stacked in a direction perpendicular to the beam axis direction in a plane and the layers are fixed together with adhesive. This causes the adhesive that secures the wood pieces of the joint wood to extend in the beam axis direction, and the compressive strength and rigidity of the adhesive can be increased in the beam axis direction of the joint wood.

[0014] It is desirable that the steel rod protruding from the joint wood be inserted into a hole in the wooden beam in the beam axis direction, and that the hole be filled with a filler material. This improves the rigidity and strength of the beam-column joint.

[0015] The steel plate may be the web of an H-shaped steel, and the joint timber may be provided on both sides of the web between the upper and lower flanges of the H-shaped steel. This also improves the rigidity and strength of the beam-column joint.

[0016] The upper end or the lower end, or both the upper end and the lower end, of the steel plate may be inserted into the wooden pole and fixed to the wooden pole. This improves the load transfer performance of the column-beam joint. [Effects of the Invention]

[0017] The present invention makes it possible to provide a joint structure etc. that can ensure rigidity and strength at the joint between a wooden column and a wooden beam while achieving ease of construction and a beautiful appearance to the greatest extent possible. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view showing an outline of a beam-column joint using the joint structure 1. FIG. [Figure 2] FIG. 2 is a cross-sectional view of a through-hole 21. [Figure 3] This is an example in which the tip of the protruding part of the steel plate 4 is positioned midway in the span direction of the wooden beam 3a. [Figure 4] An example where steel plate 4 has different heights. [Figure 5] An example in which a wooden joint 5 and a wooden beam 3 are joined using a steel rod 7. [Figure 6] An example in which an H-shaped steel 8 is installed inside a through hole 21. [Figure 7] FIG. 2 is a perspective view showing an outline of a beam-column joint using an H-shaped steel 8. [Figure 8] An example in which the piece 9 is arranged so as to fill the upper part of the through hole 21. [Figure 9] An example in which the protruding portion of the steel plate 4a is inserted into the slit 23 of the wooden column 2. [Figure 10] A diagram showing screw 24. [Figure 11] 1 is a perspective view showing an outline of a beam-column joint using the joint structure 10. FIG. [Figure 12] FIG. 2 is a cross-sectional view of a through-hole 21. [Figure 13] An example in which the layering direction of the wooden material 201 of the wooden column 20 is the same as the layering direction of the wooden material 501 of the joint wood 50. [Figure 14] 10 shows an example in which a chemical agent is injected or impregnated into the wooden material 501 of the joint wood 50a. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0020] [First embodiment] 1 is a perspective view showing an outline of a column-beam joint using a joint structure 1 according to a first embodiment of the present invention. The joint structure 1 joins a wooden column 2 and a wooden beam 3.

[0021] The wooden column 2 is a column material made of wooden material, and the wooden beam 3 is a beam material made of wooden material. These wooden materials are made of laminated wood, and in the wooden column 2, the fiber direction of the laminated wood is vertical, and in the wooden beam 3, the fiber direction of the laminated wood is the beam axis direction, but this is not limited to this. It is also possible to use wooden materials such as CLT (Cross Laminated Timber) and LVL (Laminated Veneer Lumber). The beam axis direction corresponds to the left-right direction in Figure 1.

[0022] The wooden column 2 has a through hole 21 that penetrates in the beam axis direction of the wooden beam 3. The through hole 21 is a hollow portion that is open to both side surfaces of the wooden column 2. Inside the through hole 21, a steel plate 4 and a joint wooden piece, which will be described later, are provided. The wooden beam 3 is joined to both sides of the wooden column 2. The wooden beam 3 is composed of a pair of wooden boards 31 that divide the wooden beam 3 into two in the direction perpendicular to the beam axis (beam width direction). The beam axis perpendicular direction is a direction perpendicular to the beam axis direction of the wooden beam 3 in a plane, and corresponds to the depth direction in Figure 1.

[0023] Fig. 2(a) is a diagram showing a vertical cross section (hereinafter sometimes simply referred to as the vertical cross section of the through hole 21) of the through hole 21 of the wooden column 2, which is perpendicular to the beam axis direction of the wooden beam 3. Fig. 2(b) is a diagram showing a horizontal cross section of the through hole 21. Fig. 2(a) shows a cross section taken along line BB in Fig. 2(b), and Fig. 2(b) shows a cross section taken along line AA in Fig. 2(a).

[0024] As shown in FIGS. 2(a) and 2(b), a steel plate 4 and a joint wooden piece 5 are provided in the through hole 21.

[0025] The steel plate 4 is arranged with its plate surface oriented vertically and protruding on both sides in the beam axis direction from the through-hole 21 of the wooden column 2. The beam axis direction corresponds to the normal direction to the paper surface in Figure 2(a) and the left-right direction in Figure 2(b).

[0026] The joint wooden pieces 5 are arranged in pairs, sandwiching the steel plate 4 in a direction perpendicular to the beam axis, so as to fill the space inside the through-hole 21 (other than the steel plate 4). The direction perpendicular to the beam axis corresponds to the left-right direction in FIG. 2(a) and the up-down direction in FIG. 2(b). For the joint wooden pieces 5, for example, laminated lumber with the grain direction oriented vertically is used, but the invention is not limited to this.

[0027] The steel plate 4 and the wooden joints 5 on both sides thereof are fixed with adhesive 6. The steel plate 4 and the wooden joints 5 are fixed to the inner surface of the through-hole 21 with adhesive 22.

[0028] On the outside of the wooden column 2, the protruding portions of the steel plates 4 are inserted between the wooden boards 31. The wooden boards 31 are fixed to both sides of the protruding portions of the steel plates 4 with adhesive 32, thereby forming the wooden beam 3. The protruding portions of the steel plates 4 are arranged over the entire span of the wooden beam 3, for example, so as to extend to the adjacent column-beam joint. The adjacent column-beam joints also have the same joint structure 1 as this embodiment.

[0029] In the joint structure 1 of this embodiment, a wooden joint 5 is provided to fill the through hole 21 in the wooden column 2, and the vertical steel plate 4 fixed to the wooden joint 5 is fixed to the wooden beam 3, thereby ensuring the rigidity and strength of the column-beam joint. Furthermore, in this embodiment, the column-beam joint has a simple structure using the steel plate 4 and the wooden joint 5, which makes construction easy and also achieves a beautiful appearance as much as possible.

[0030] However, the present invention is not limited to the above-described embodiment. For example, in this embodiment, the protruding portion of the steel plate 4 is provided along the entire span of the wooden beam 3. However, as shown in the horizontal cross section of FIG. 3, the tip of the protruding portion of the steel plate 4 may be positioned midway along the span of the wooden beam 3a. In this case, the wooden beam 3a is formed from a single piece of wood material with a slit 33 in the beam axis direction at the end facing the wooden column 2. The protruding portion of the steel plate 4 is inserted into the slit 33 and fixed to the wooden beam 3a with adhesive 32. In addition to the adhesive 32, metal inserts such as drift pins and screws (not shown) may also be used to fix the protruding portion of the steel plate 4 to the wooden beam 3a. This also applies when the protruding portion of the steel plate 4 is provided along the entire span of the wooden beam 3.

[0031] Furthermore, in this embodiment, the steel plate 4 is disposed over the entire height of the connecting wooden pieces 5 and the wooden beam 3, thereby achieving high structural performance, but the height of the steel plate 4 is not particularly limited. For example, as shown in the vertical cross section of the through hole 21 in Figure 4(a), the steel plate 4 may be disposed from the lower end of the connecting wooden pieces 5a to the middle of the height of the connecting wooden pieces 5a. The connecting wooden pieces 5a are integral members having vertical slits 51 on their undersides, and the steel plate 4a is inserted into the slits 51 and fixed to the connecting wooden pieces 5a with adhesive 6 in the slits 51.

[0032] The wooden beam into which the steel plate 4 is inserted also has a cross section similar to that of the joint wood 5a. That is, as shown in Fig. 4(b) of a vertical cross section perpendicular to the beam axis direction, the wooden beam 3b is an integral member with a vertical slit 34 on its underside, and the part of the steel plate 4 protruding from the wooden column 2 is inserted into the slit 34 and fixed to the wooden beam 3a by the adhesive 32 in the slit 34.

[0033] 5, the wooden joint 5 and the wooden beam 3 may be joined using a steel rod 7 by the GIR (Glued-in-Rod) method. The steel rod 7 is passed through a through-hole 52 in the wooden joint 5 in the beam axis direction, and protrudes from the wooden joint 5 to both sides of the wooden column 2. The through-hole 52 is filled with adhesive 53, which fixes the steel rod 7 to the wooden joint 5.

[0034] The protruding portions of the steel rods 7 are inserted into holes 311 in the beam axis direction of the wooden boards 31. By filling the holes 311 with a filler 312 such as an adhesive, the protruding portions of the steel rods 7 are fixed to the wooden boards 31, and the joint wood 5 and wooden beam 3 are joined using the steel rods 7. This improves the rigidity and strength of the column-beam joint. The steel rods 7 are provided in a single row or in multiple rows, one above the other, on both sides of the steel plate 4 in the direction perpendicular to the beam axis.

[0035] As shown in the vertical cross section of through hole 21 in Figure 6, an H-shaped steel 8 may be provided inside through hole 21, which also improves the rigidity and strength of the beam-column joint. H-shaped steel 8 is arranged with the plate surface of web 81 (steel plate) oriented vertically. Joint timber 5 is provided between the upper and lower flanges 82 of H-shaped steel 8 on both sides of web 81 in the direction perpendicular to the beam axis (corresponding to the left and right direction in Figure 6). Joint timber 5 and H-shaped steel 8 are fixed with adhesive 6.

[0036] 7(a) is a perspective view showing an outline of a beam-column joint using an H-shaped steel 8. In this example, only the web 81 of the H-shaped steel 8 protrudes on both sides of the wooden column 2, and wooden boards 31 are fixed to both sides of the protruding part using adhesive, as described above. In addition to adhesive, metal inserts such as drift pins and screws (not shown) may also be used in combination.

[0037] The web 81 is provided over the entire span of the wooden beam 3, but the tip of the protruding portion of the web 81 may be positioned midway in the span of the wooden beam 3. In this case, the wooden beam 3 has a slit at the end on the wooden column 2 side for inserting the web 81, as in the example of Figure 3.

[0038] The upper and lower flanges 82 of the H-shaped steel 8 are attached to the side of the wooden column 2 and do not protrude outside the wooden column 2. However, as shown in Figure 7(b), the flanges 82 may protrude outside the wooden column 2. The wooden board 31 is placed between the upper and lower flanges 82, and the upper and lower flanges 82 have a stiffening effect on the end of the wooden beam 3, improving the rigidity and strength of the end of the wooden beam 3. The tip of the protruding part of the flange 82 is located midway in the span direction of the wooden beam 3, but the flange 82 may be provided over the entire length of the wooden beam 3 in the span direction. Furthermore, as in Figure 5, it is also possible to join the joint wood 5 and the wooden board 31 using a steel rod 7.

[0039] Furthermore, as shown in the vertical cross section of the through hole 21 in Figure 8, if the height of the through hole 21 in the wooden column 2 is large, a piece of material 9 may be fixed to the upper surface of the upper flange 82 of the H-shaped steel 8 with adhesive 6, and the piece of material 9 may be arranged so as to fill the upper part of the through hole 21.

[0040] In this embodiment, the steel plate 4 and the wooden joints 5 on both sides in the direction perpendicular to the beam axis are fixed with adhesive 6, but the steel plate 4 and the wooden joints 5 on both sides may also be mechanically fixed using bolts or drift pins that penetrate the steel plate 4 and the wooden joints 5 on both sides. The same applies to the fixation of the web 81 of the H-shaped steel 8 and the wooden joints 5 on both sides in the direction perpendicular to the beam axis.

[0041] Furthermore, in this embodiment, the steel plates 4 protrude from both sides of the wooden column 2, but in a T-shaped beam-column joint on the periphery of a building, etc., the wooden beam 3 is provided on only one side of the wooden column 2, and the steel plate 4 protrudes from the wooden column 2 only on that side. On the opposite side, the end of the steel plate 4 in the beam axis direction is either flush with the side of the wooden column 2 or is located more inward than that side. In the latter case, the space in the wooden column 2 where the steel plate 4 and the joint wood 5 are placed does not need to be a through hole 21 in the beam axis direction, but may be a hollow portion open to only one side of the wooden column 2. The above also applies to the H-shaped steel 8 and its web 81.

[0042] 9(a) shows a schematic diagram of a beam-column joint, the vertical surface of the steel plate 4a may be cross-shaped, with its upper and lower ends protruding from the through-hole 21 and inserted into the slit 23 of the wooden column 2. The upper and lower protruding portions of the steel plate 4a are fixed to the wooden column 2 by adhesive filled in the slit 23. This improves the load transmission performance of the beam-column joint.

[0043] In the example of Figure 9(a), the upper and lower protruding portions of the steel plate 4a are exposed on the left and right side surfaces of the wooden column 2, but the upper and lower protruding portions of the steel plate 4a may be set back inward from the left and right side surfaces of the wooden column 2. This prevents deterioration of the steel plate 4a and is also aesthetically pleasing. The same applies to the protruding portions of the steel plate 4a in the beam axis direction. That is, in the example of Figure 9(a), the protruding portions of the steel plate 4a in the beam axis direction are exposed on the upper and lower surfaces of the wooden beam 3a, but they may be set back inward from the upper and lower surfaces.

[0044] The protruding direction of the steel plate 4a can be determined appropriately depending on the combination of the wooden column 2 and the wooden beam 3a. For example, in a T-shaped column-beam joint on the top floor of a building, as shown in FIG. 9(b), the lower end of the steel plate 4a and both sides in the beam axis direction can be protruded. In an upside-down T-shaped column-beam joint on the bottom floor of a building, the upper end of the steel plate 4a and both sides in the beam axis direction can be protruded. In a T-shaped column-beam joint on the periphery of a building, the upper and lower ends of the steel plate 4a and one side in the beam axis direction can be protruded.

[0045] As shown in the vertical cross section of the through hole 21 in Figure 10, screws 24 or the like may be used to insert into the interior of the wooden column 2 from one side of the wooden column 2 in a direction perpendicular to the beam axis, thereby enhancing the unity between the upper and lower protruding portions of the steel plate 4a and the wooden column 2.

[0046] Next, a second embodiment of the present invention will be described. In the second embodiment, differences from the first embodiment will be described, and similar configurations will be denoted by the same reference numerals in the drawings and the like, and a description thereof will be omitted. Furthermore, the configuration described in the second embodiment can be combined with the configuration of the first embodiment as necessary.

[0047] [Second embodiment] 11 is a perspective view showing an outline of a beam-column joint using a joint structure 10 according to a second embodiment of the present invention. The joint structure 10 of this embodiment also joins wooden beams 30 to both sides of a wooden column 20, but the method for ensuring the rigidity of the beam-column joint is different from that of the first embodiment.

[0048] The wooden column 20 is made of laminated wood, and is constructed by stacking multiple layers of plank-shaped wooden material 201 with the fiber direction oriented vertically in the beam axis direction and fixing the layers together with adhesive. As described above, the wooden column 20 has a through-hole 21 that penetrates the wooden column 20 in the beam axis direction. The beam axis direction corresponds to the left-right direction in Figure 11.

[0049] Fig. 12(a) is a diagram showing a vertical cross section of through hole 21. Fig. 12(b) is a diagram showing a horizontal cross section of through hole 21. Fig. 12(a) shows a cross section taken along line DD in Fig. 12(b), and Fig. 12(b) shows a cross section taken along line CC in Fig. 12(a).

[0050] 12(a) and 12(b), a joint piece of wooden material 50 is provided inside the through-hole 21. The joint piece of wooden material 50 is arranged so as to fill the space inside the through-hole 21, and is fixed to the inner surface of the through-hole 21 with adhesive 22.

[0051] Glued wood is used for the joint wood 50, and multiple layers of plank-shaped wood material 501 with the grain oriented vertically are stacked in a direction perpendicular to the beam axis and fixed between the layers with adhesive. The direction perpendicular to the beam axis corresponds to the left-right direction in Figure 12(a) and the up-down direction in Figure 12(b).

[0052] In the joint structure 10 of this embodiment, the compressive strength and rigidity per unit area of ​​the joint wood 50 in the beam axis direction are higher than the compressive strength and rigidity per unit area of ​​the wooden column 20 in the beam axis direction. The above unit area is the unit area of ​​a plane perpendicular to the beam axis direction. The beam axis direction corresponds to the normal direction to the paper surface in Figure 12(a) and the left-right direction in Figure 12(b).

[0053] When comparing compressive strength and rigidity, for example, a compression test is conducted in which the entire wooden joint 50 is compressed in the beam axis direction, and a test specimen is also prepared for the wooden column 2 (part other than the through hole 21) including the entire wooden column 2 in the direction perpendicular to the beam axis (beam width direction) and the beam axis direction, and the same compression test is conducted in which the entire test specimen is compressed in the beam axis direction, and the compressive strength and rigidity can be compared from the results of both compression tests. Rigidity can be obtained, for example, as Young's modulus during the compression test.

[0054] In this embodiment, the wooden joint 50 is made by laminating wooden pieces 501 in a direction perpendicular to the beam axis, and the adhesive between the layers extends in the beam axis direction. The compressive strength and rigidity of this adhesive can increase the compressive strength and rigidity of the wooden joint 50 in the beam axis direction. Note that it is desirable that the compressive strength and rigidity per unit area (on the horizontal plane) of the wooden joint 50 be higher than those of the wooden column 20 not only in the beam axis direction but also in the vertical direction.

[0055] The wooden beam 30 is a beam material made of wooden material. The wooden material can be laminated timber, CLT, LVL, etc. The wooden beam 30 is joined to the end of the joint wood 50 in the beam axis direction. There is no particular restriction on the joining method. For example, joining with adhesive or joining using steel rods 7 as shown in Figure 5 is possible.

[0056] In the joint structure 10 of the second embodiment, the compressive strength and rigidity per unit area in the beam axis direction of the joint wood 50 provided to fill the through hole 21 of the wooden column 20 are higher than the compressive strength and rigidity per unit area in the beam axis direction of the wooden column 20. This ensures the rigidity and strength of the column-beam joint. In the second embodiment, the column-beam joint can be constructed mainly from wood materials, which requires almost no other construction methods, making construction easy and achieving a beautiful appearance.

[0057] In addition, in this embodiment, the joint wood 50 is constructed by stacking multiple layers of plank-shaped wood material 501 in a direction perpendicular to the beam axis and fixing the layers together with adhesive, and the adhesive that extends in the beam axis direction can increase the compressive strength and rigidity in the beam axis direction.

[0058] In this embodiment, the wooden joint pieces 50 are made of laminated lumber, but the wooden joint pieces 50 are not limited to this, and may also be made of CLT, LVL, or the like. Furthermore, if the wooden pieces 501 themselves have high compressive strength and rigidity, it is possible to make the compressive strength and rigidity per unit area of ​​the wooden joint pieces 50 in the beam axis direction higher than those of the wooden column 20, even if the lamination direction of the wooden pieces 201 in the wooden column 20 and the lamination direction of the wooden joint pieces 501 are the same, as shown in the horizontal cross section of Figure 13. In the case of CLT, the compressive strength and rigidity of the wooden joint pieces 50 in the beam axis direction can be increased by aligning the fiber direction of some of the wooden pieces 501 with the beam axis direction.

[0059] As shown in Figure 14(a), the wooden material 501 of the wooden joint 50a may be injected with or impregnated with a chemical such as an adhesive to increase its compressive strength and rigidity. In the example of Figure 14(a), the entire wooden joint 50a is injected with or impregnated with the chemical solution. However, as shown by the symbol a in Figure 14(b), it is also possible to inject or impregnate the chemical solution at the upper and lower ends of the wooden joint 50a in the beam axis direction, with no chemical solution being used in other parts. This is because when a moment M is applied to the wooden beam 30, the load F in the beam axis direction is concentrated at the upper and lower ends.

[0060] It is desirable to use laminated wood 50a for the joint wood, which has the same compressive strength and rigidity as the wooden column 20. However, if the compressive strength and rigidity can be sufficiently improved by the chemical solution, it is also possible to use laminated wood with lower compressive strength and rigidity than the wooden column 20.

[0061] As in the first embodiment, the wooden beam 30 can also be joined to the wooden joint piece 50 of the wooden column 20 using the steel plate 4. Although the through hole 21 of the wooden column 20 is open on both sides of the wooden column 20, when the wooden beam 30 is provided on only one side of the wooden column 20 at a T-shaped column-beam joint on the periphery of a building, the space in which the wooden joint piece 5 is placed can be a hollow portion open on only one side of the wooden column 20, as in the first embodiment.

[0062] While the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to these examples. It is clear that those skilled in the art can conceive of various modifications or alterations within the scope of the technical ideas disclosed herein, and it is understood that these modifications also fall within the technical scope of the present invention. [Explanation of symbols]

[0063] 1, 10: Joint structure 2, 20: Wooden pillar 3, 3a, 3b, 30: Wooden beam 4, 4a: Steel plate 5, 5a, 50, 50a: joint wood 6, 22, 32, 53: Adhesive 7: Steel rod 8:H-shaped steel 21, 52: Through holes 81:Web 82: Flange 201, 501: Wooden materials 311: Hole 312: Filling material

Claims

1. A joint structure of wooden columns and wooden beams, The wooden pole has a hollow portion that is open to a side surface of the wooden pole, A joint wood is provided to fill the cavity, A vertical steel plate is fixed to the joint timber within the cavity, The steel plate protrudes from the hollow portion to the outside of the wooden column and is inserted into the wooden beam, A joint structure characterized in that the steel plate inserted into the wooden beam is fixed to the wooden beam.

2. A joint structure of wooden columns and wooden beams, The wooden pole has a hollow portion that is open to a side surface of the wooden pole, A joint wood is provided to fill the cavity, The wooden beam is joined to the joint wood, A joint structure characterized in that the compressive strength and rigidity of the wooden beam in the beam axis direction per unit area of ​​the joint wood are higher than the compressive strength and rigidity of the wooden column in the beam axis direction per unit area.

3. A joint structure as described in claim 1, characterized in that the compressive strength and rigidity in the beam axis direction of the wooden beam per unit area of ​​the joint wood are higher than the compressive strength and rigidity in the beam axis direction per unit area of ​​the wooden column.

4. The wooden column has a configuration in which a plurality of layers of plank-shaped wooden materials are stacked in the beam axis direction and fixed between the layers with adhesive, The joint structure according to claim 2 or 3, characterized in that the joint wood has a structure in which multiple layers of plank-shaped wood material are stacked in a direction perpendicular to the beam axis direction in a plane and fixed between the layers with adhesive.

5. 3. A joint structure according to claim 1, wherein a steel rod protruding from the joint wood is inserted into a hole in the wooden beam in the beam axis direction, and the hole is filled with a filler material.

6. 2. The joint structure according to claim 1, wherein the steel plate is the web of an H-shaped steel, and the joint wood is provided on both sides of the web between the upper and lower flanges of the H-shaped steel.

7. The joint structure according to claim 1, characterized in that the upper end or the lower end, or both the upper end and the lower end, of the steel plate are inserted into the wooden pole and fixed to the wooden pole.

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