Joint structure

Abstract

To provide a joint structure that can demonstrate energy absorption performance from the initial stage of vibration by joining a wooden shaft member such as a pillar or beam to a damping member. [Solution] The joint structure 10 joins a damping member 2 to wooden beams 1, which are a pair of wooden shaft members. In the joint structure 10, a joint plate 22 provided at one end of the damping member 2 is inserted into a groove 11 provided in one wooden beam 1, and an adhesive 5 is filled into the groove 11. Also, a joint plate 22 provided at the other end of the damping member 2 is inserted into a groove 11 provided in the other wooden beam 1, and the groove 11 is filled with an adhesive 5. The joint plate 22 has a hole 221, and the adhesive 5 is also filled into the hole 221.

Description

[Technical Field]

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

[0002] Patent Document 1 discloses a configuration in which a vibration-damping device with vibration-damping means is installed between wooden pillars. The vibration-damping device and the pillars are joined by fastening a metal frame around the periphery of the vibration-damping device to the pillars with screws. When the rectangular frame is deformed due to vibrations in the frame, the vibration-damping device absorbs the vibration energy using vibration-damping means such as high-damping rubber.

[0003] Patent Document 2 also discloses a steel damper that is placed between the edges of two wooden panels. The steel damper in Patent Document 2 has fixing pieces that are inserted into the accommodation grooves of both wooden panels, and the steel damper can be joined to both wooden panels by inserting pins into through holes formed in each wooden panel and fixing piece. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2025-83651 [Patent Document 2] Japanese Patent Application Publication No. 2023-176674 Summary of the Invention [Problem to be solved by the invention]

[0005] The vibration control device installed between pillars in Patent Document 1 is a large-scale device with vibration damping means attached inside the frame. In contrast, by using a steel damper as in Patent Document 2, the structure becomes simpler and construction becomes easier.

[0006] In Patent Document 2, a pin is used to connect the fixed piece of the steel damper to the wooden panel, but for construction reasons, a clearance is generally required in the through hole of the fixed piece relative to the pin diameter. The presence of this clearance reduces the rigidity of the joint of the fixed piece in the early stages of vibration, making it difficult to demonstrate energy absorption performance from the early stages of vibration.

[0007] In Patent Document 2, the position of a through-hole in one of the fixing pieces is intentionally shifted slightly from the position of the through-hole in the wood panel, so that the pin comes into surface contact with part of the inner surface of the through-hole in the fixing piece. However, the through-holes in the fixing piece and the wood panel must be formed with high precision, which is difficult to manufacture. In addition, the pressure-bearing part of the wood panel caused by the pin is subject to deformation due to indentation, so even if surface contact is made in advance, the rigidity of the joint is inevitably low.

[0008] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a joint structure that can join wooden shaft members such as pillars and beams to damping members, and can demonstrate energy absorption performance from the early stages of vibration. [Means for solving the problem]

[0009] In order to achieve the above-mentioned object, the present invention provides a joining structure for joining a damping member to a pair of wooden shaft members which are wooden columns or wooden beams, characterized in that a first joining plate which is a first joint provided on the damping member is inserted into a groove provided on one of the pair of wooden shaft members, an adhesive is filled into the groove, and the other of the pair of wooden shaft members is joined to a second joint provided on the damping member.

[0010] In this invention, the joining plates of the damping member are inserted into grooves in the wooden shaft member and filled with adhesive. This configuration eliminates the aforementioned clearance at the joining points of the joining plates, ensuring the rigidity of the joining points in the early stages of vibration and enabling energy absorption performance from the early stages of vibration. Furthermore, the damping member is easy to manufacture, and the wooden shaft member does not experience the aforementioned sinking deformation during vibration.

[0011] It is desirable that the first joining plate has holes, and that the holes are filled with the adhesive. The shear resistance of the adhesive filled into the holes in the joining plates is expected to increase the rigidity and strength of the joints of the joining plates. In addition, the adhesive can flow from one plate surface to the other through the holes, improving the filling efficiency of the adhesive.

[0012] The second joint is a second joint plate provided on the damping member, and it is desirable that the second joint plate be inserted into a groove provided in the other wooden shaft member and that an adhesive be filled into the groove. This ensures the rigidity of the joints of the joining plates for both wooden shaft members at the initial stage of vibration.

[0013] It is desirable that the pair of wooden shaft members be arranged with a gap therebetween in a direction perpendicular to the axial direction, and that the damping member be disposed in the gap. This allows vibration energy to be absorbed by the damping member when wooden beams are provided above and below or when wooden pillars are used as columns.

[0014] The first bonding plate may be disposed so that at least one side of the outer periphery of the plate surface is in contact with the inner surface of the groove, and a notch may be provided on the side. The notch ensures the fluidity of the adhesive even when the outer edge of the joining plate is in contact with the inner surface of the groove, which allows the groove dimensions to be reduced and prevents cross-sectional loss of the wooden shaft member due to the groove.

[0015] The first bonding plate may have a surface provided with irregularities to improve adhesion to the adhesive material. This increases the strength of the joints of the joint plates. [Effects of the Invention]

[0016] According to the present invention, a joint structure can be provided that can join a wooden shaft member such as a pillar or beam to a damping member, and can exhibit energy absorption performance from the early stage of vibration. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a diagram showing a wooden frame provided with a joint structure 10. FIG. [Figure 2] 1 is a diagram showing a joint structure 10. FIG. [Figure 3] 1 is a diagram showing a joint structure 10. FIG. [Figure 4] 1 is a diagram showing a joint structure 10. FIG. [Figure 5] A diagram explaining the construction procedure for a wooden frame. [Figure 6] 10A and 10B are diagrams for explaining the increase in stiffness and strength due to the shear resistance of adhesive 5. [Figure 7] 2A and 2B are diagrams showing examples of the size, number, and arrangement of holes 221. [Figure 8] FIG. 2 shows the cutout 222. [Figure 9] 3A and 3B are diagrams showing examples of targets on which the damping member 2 is to be installed. [Figure 10] 3A and 3B are diagrams showing examples of targets on which the damping member 2a is to be installed. [Figure 11] FIG. 3 is a diagram illustrating the thickness d of the fire-stopping layer 13. [Figure 12] 3A and 3B are diagrams showing examples of targets on which the damping member 2 is to be installed. [Figure 13] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0019] FIG. 1(a) is a diagram showing a wooden frame having a joint structure 10 according to an embodiment of the present invention. The wooden frame in FIG. 1(a) has a rigid frame structure made of wooden beams 1 and wooden columns 3. The wooden beams 1 and wooden columns 3 are shaft members (wooden shaft members) made of wooden material. There are no particular restrictions on the wooden material used for the wooden beams 1 and wooden columns 3. A pair of wooden beams 1 are arranged between the left and right wooden columns 3 with a gap in the vertical direction. "Left and right" refers to both sides in the axial direction of the wooden beam 1. The vertical direction is perpendicular to the axial direction of the wooden beam 1.

[0020] In the joint structure 10 of this embodiment, a damping member 2 is joined to a pair of upper and lower wooden beams 1, and the damping member 2 is placed between the upper and lower wooden beams 1. The damping member 2 is a steel damper that absorbs vibration energy by plastically deforming. When vibrations due to an earthquake or the like occur in the wooden frame, the damping member 2 undergoes plastic deformation due to the horizontal relative displacement that occurs between the upper and lower wooden beams 1, as shown in Figure 1(b). This absorbs vibration energy and damps the vibration of the wooden frame.

[0021] Figures 2 to 4 are diagrams showing the joint structure 10. Figure 2 is a perspective view of the joint structure 10, and Figure 3 is a diagram showing the joint structure 10 in a vertical cross section along the axial direction of the wooden beam 1. Figure 4 is a diagram showing the joint structure 10 in a cross section perpendicular to the axial direction of the wooden beam 1. Figure 3 shows a cross section along line BB in Figure 4, and Figure 4 shows a cross section along line AA in Figure 3.

[0022] The damping member 2 is a steel member with connecting plates 22 (first and second connecting plates) attached to the upper and lower ends of a plate-shaped damping section 21. The damping section 21 and connecting plates 22 are formed from a single continuous steel plate. The damping member 2 is placed between the upper and lower wooden beams 1 so that the plate thickness direction of the damping section 21 and connecting plates 22 is perpendicular to the axial direction of the wooden beam 1 in a plane.

[0023] The damping section 21 absorbs vibration energy by plastic deformation. In this embodiment, the damping section 21 has a constricted shape in which the length along the axial direction of the wooden beam 1 gradually decreases from the upper and lower ends to the center in the vertical direction.

[0024] The joint plate 22 is a joint (first joint and second joint) that joins the damping member 2 to the wooden beam 1. The joint plate 22 is a rectangular plate material, and is arranged so that its long side direction is the axial direction of the wooden beam 1. The damping section 21 is provided in the middle of the long side direction of the joint plate 22. The joint plate 22 has a plurality of holes 221. These holes 221 are provided at predetermined intervals in the long side direction of the joint plate 22.

[0025] On the underside of the upper wooden beam 1 and on the top side of the lower wooden beam 1, grooves 11 having a depth and width that allow the insertion of joining plates 22 are provided along the axial direction of the wooden beam 1. The "width" refers to the length in the direction perpendicular to the axial direction of the wooden beam 1 in a plane.

[0026] In the joining structure 10, the joining plates 22 at the upper and lower ends of the damping section 21 are inserted into the grooves 11 of the upper and lower wooden beams 1, respectively, and the grooves 11 are filled with adhesive 5. This joins the joining plates 22 at the upper and lower ends of the damping section 21 to the upper and lower wooden beams 1, respectively. The adhesive 5 is, for example, an adhesive such as epoxy resin, but is not limited to this. The adhesive 5 also fills the entire inside of the holes 221 of the joining plates 22.

[0027] When constructing a wooden frame, first, the groove 11 of the wooden beam 1 is shallowly filled with adhesive 5, and one of the connecting plates 22 of the damping member 2 is inserted into the groove 11 to temporarily fix the damping member 2, and then the remaining adhesive 5 is filled into the groove 11 as a finishing touch. Alternatively, a separate temporary fixing jig (not shown) is used to temporarily fix the damping member 2 with one of the connecting plates 22 inserted into the groove 11 of the wooden beam 1, and then all of the adhesive 5 is filled. In this way, one of the connecting plates 22 of the damping member 2 is joined to the wooden beam 1. The above steps may be performed in advance in a factory or the like, or may be performed at the construction site after the wooden beam 1 has been transported from a factory or the like to the construction site.

[0028] Then, as shown in Fig. 5, one of the wooden beams 1 is installed between the wooden columns 3. After that, as shown in Fig. 1(a), the other wooden beam 1 is installed between the wooden columns 3. At this time, the other joining plate 22 of the damping member 2 is inserted into the groove 11 of the other wooden beam 1, and the adhesive 5 is filled in.

[0029] However, the construction method of a wooden frame is not limited to this. For example, after one wooden beam 1 is installed between wooden columns 3, one connecting plate 22 of the damping member 2 can be joined to the wooden beam 1 using the above method. The subsequent steps are the same as those described above. Alternatively, the damping members 2 can be joined to both wooden beams 1 in advance, and then these wooden beams 1 can be installed between wooden columns 3.

[0030] As explained above, in this embodiment, the connecting plates 22 of the damping member 2 are inserted into the grooves 11 provided in the wooden beam 1 and filled with adhesive 5. With this configuration, there is no clearance at the joints of the connecting plates 22, ensuring the rigidity of the joints in the early stages of vibration and enabling the wooden frame to exhibit energy absorption performance from the early stages of vibration when displacement is small during earthquakes, etc. Furthermore, the damping member 2 is easy to manufacture, and the wooden beam 1 does not experience the aforementioned compressive deformation during vibration.

[0031] In this embodiment, the holes 221 are provided in the joining plates 22 of the damping member 2, but the holes 221 can be omitted, which makes it easier to manufacture the damping member 2. In contrast, in the joining structure 10 of this embodiment, by providing the holes 221 in the joining plates 22, it is possible to expect an increase in rigidity and strength at the joining points of the joining plates 22 due to the shear resistance of the adhesive 5 filled in the holes 221.

[0032] This is explained by graphs 6 and 7 in Figure 6. Graph 6 shows the relationship between the displacement and load of the joining plate 22 when there are no holes 221 in the joining plate 22, and graph 7 shows the relationship between the displacement and load of the joining plate 22 when there are holes 221 in the joining plate 22. When holes 221 are provided in the joining plate 22 (graph 7), the structural performance after the adhesive 5 has hardened is determined by the shear resistance of the adhesive 5 inside the holes 221 in addition to the adhesion resistance of the surface of the joining plate 22. As a result, the elastic rigidity and maximum strength of the joint are greater than when there are no holes 221 in the joining plate 22 (graph 6), and the decrease in strength after the maximum strength is also gradual.

[0033] If the connecting plate 22 does not have holes 221, the dimensions of the groove 11 and connecting plate 22 would be increased to increase the adhesion area between the connecting plate 22 and the adhesive 5 in order to improve the rigidity and strength of the joint. However, increasing the dimensions of the groove 11 would result in a larger cross-sectional loss in the wooden beam 1. Furthermore, because the damping member 2 acts as a thermal bridge during a fire, increasing the insertion depth of the connecting plate 22 into the wooden beam 1 would be disadvantageous in terms of fire resistance. In contrast, by providing holes 221 in the connecting plate 22 and allowing the adhesive 5 inside the holes 221 to exert its shear resistance, there is no need to increase the dimensions of the groove 11 and connecting plate 22. Reducing the dimensions of the groove 11 also reduces the area of ​​the adhesive 5 exposed to the outside, improving design.

[0034] Furthermore, with the joint structure 10 of this embodiment, it is possible to make the damping member 2 exhibit its energy absorption performance from the early stage of vibration against displacements in both directions of the wooden frame. In this embodiment, as shown in Fig. 3, in the joint plate 22, multiple holes 221 are arranged symmetrically with respect to the center line C in the vertical direction of the damping section 21, in order to make the above-mentioned shear resistance force exhibited in a balanced manner against displacements in both directions of the wooden frame.

[0035] In this embodiment, the holes 221 in the joining plate 22 allow the adhesive 5 to flow from one plate surface of the joining plate 22 to the other plate surface through the holes 221, improving the fillability of the adhesive 5. The "plate surfaces" refer to the two largest surfaces of the joining plate 22. Without the holes 221 in the joining plate 22, improving the fillability of the adhesive 5 requires enlarging the dimensions of the groove 11 to ensure a wide gap between the inner surface of the groove 11 and the joining plate 22, or filling the adhesive 5 from multiple locations. However, by providing the holes 221 in the joining plate 22, the dimensions of the groove 11 do not need to be enlarged. This reduces cross-sectional loss of the wooden beam 1 due to the groove 11 and also reduces the amount of adhesive 5 used. Furthermore, since there is no need to fill the adhesive 5 from multiple locations, the filling process of the adhesive 5 can be simplified.

[0036] 3 has a circular shape which is easy to process, the shape of the holes 221 is not limited to this and may be an ellipse or a polygon. The size, number and arrangement of the holes 221 are not limited to those shown in Fig. 3 either, and may be set appropriately within a range in which cross-sectional loss due to the holes 221 does not cause a problem, taking into consideration the stress acting on the joining plate 22.

[0037] 7(a), for example, one hole 221 is provided at each end of the long side of the joint plate 22. In this way, providing the holes 221 at positions closer to both ends of the long side of the joint plate 22 allows the adhesive 5 in the holes 221 to effectively exert shear resistance against the bending moment generated in the damping member 2 due to the relative displacement of the upper and lower wooden beams 1.

[0038] 7(b), due to considerations such as yield strength, more holes 221 are provided at intervals in the longitudinal direction of the joining plate 22 than in the example of Fig. 7(a), but the sizes of these holes 221 are varied so that the holes 221 provided in the middle of the long side of the joining plate 22 are smaller than the holes 221 at both ends of the long side. This makes it possible to minimize cross-sectional loss of the joining plate 22 in the vicinity of the damping section 21.

[0039] 7(c), the positions of the holes 221 in the joining plate 22 in the vertical direction are changed, and the position of the hole 221 in the middle of the long side of the joining plate 22 is positioned deeper in the groove 11 than the holes 221 at both ends of the long side. This makes it possible to locate the position where the cross-sectional loss of the joining plate 22 occurs due to the hole 221 in the middle of the long side of the joining plate 22 as far away from the damping section 21 as possible.

[0040] In the example of FIG. 7(d), small-diameter holes 221 are arranged in multiple rows (two rows in the example of FIG. 7(d)) ​​in the upper joining plate 22, and by forming a large number of holes 221, it is possible to improve the filling property of the adhesive 5. The holes 221 in the lower joining plate 22 are larger than the holes 221 in the upper joining plate 22, but the number of holes 221 in the lower joining plate 22 is fewer than that in the upper joining plate 22, and they are arranged in only one row in the vertical direction. In this way, the size, number, arrangement, etc. of the holes 221 in the upper and lower joining plates 22 can be changed depending on the required strength, etc.

[0041] 8, the joining plate 22 may be arranged so that at least one edge of the outer periphery of the plate surface of the joining plate 22 contacts the inner surface of the groove 11, and a notch 222 may be provided on that edge. Fig. 8 is a diagram showing the joining plate 22 in the groove 11 in a vertical cross section along the axial direction of the wooden beam 1.

[0042] In the example shown in FIG. 8 , three edges of the outer periphery of the joining plate 22 contact the inner surface of the groove 11, and all of these edges have notches 222. By providing the notches 222 on the outer edges of the joining plate 22, the adhesive 5 can flow from one surface of the joining plate 22 to the other through the notches 222, even when the edges of the joining plate 22 contact the inner surface of the groove 11. Therefore, the dimensions of the groove 11 can be further reduced in a vertical cross section along the axial direction of the wooden beam 1 while ensuring the flowability of the adhesive 5, thereby minimizing cross-sectional loss of the wooden beam 1 due to the groove 11. Furthermore, temporary fixation of the joining plate 22 in the beam axial direction can be omitted when filling with the adhesive 5, improving workability. Although the notches 222 in FIG. 8 are semicircular for ease of processing, the shape of the notches 222 is not limited to this. Furthermore, the notch 222 can be provided on both connecting plates 22 of the damping member 2, but as shown in Fig. 5, when one wooden beam 1 with a damping member 2 already attached is installed between wooden columns 3 and the other wooden beam 1 is to be installed between wooden columns 3, it is desirable to form the notch 222 only on the connecting plate 22 that is inserted into the groove 11 of one wooden beam 1. This is because construction errors must be taken into consideration for the other wooden beam 1, and it is difficult to configure the other wooden beam 1 so that there is no clearance between the outer periphery of the connecting plate 22 and the inner surface of the groove 11.

[0043] Furthermore, the plate surface of the joining plate 22 may be provided with irregularities to improve adhesion to the adhesive 5. This increases the strength of the joining portion of the joining plate 22. The irregularities can be provided, for example, by subjecting the plate surface of the joining plate 22 to blasting. There are no particular limitations on the type of blasting, and any of shot blasting, sand blasting, grit blasting, etc. can be used.

[0044] Furthermore, an anti-rust layer may be provided on the damping portion 21 and the joining plate 22 of the damping member 2. The anti-rust layer can be formed, for example, by hot-dip galvanizing the damping portion 21 and the joining plate 22. The blasting process is performed after the hot-dip galvanizing process. The holes 221 in the joining plate 22 can also be used as hanging holes when the damping portion 21 and the joining plate 22 are immersed in a plating bath.

[0045] The configuration of the steel damper used as the damping member 2 is not particularly limited, as long as the joining plate 22 is provided at the end of the damping portion 21 that absorbs vibration energy by plastic deformation. For example, the shape of the damping portion 21 is not limited to the constricted shape shown in FIG. 3 and the like, and can be determined in various ways taking into consideration the damping performance, etc. In addition, although one damping portion 21 is provided for the pair of upper and lower joining plates 22 in this embodiment, the joining plate 22 may be elongated and multiple damping portions 21 may be provided for the pair of upper and lower joining plates 22. Furthermore, although the damping portion 21 and the joining plate 22 are formed from a single steel plate in this embodiment, the damping portion 21 and the joining plate 22 may be separate members, and the joining plate 22 may be fixed to the damping portion 21 by welding or the like.

[0046] In this embodiment, multiple damping members 2 are arranged at approximately equal intervals along the axial direction of the wooden beam 1, but there are no particular limitations on the number or arrangement of the damping members 2. For example, the damping members 2 may be concentrated in the central part of the axial direction of the wooden beam 1, or may be concentrated at the ends.

[0047] 4, in this embodiment, there is one damping member 2 in the width direction of the wooden beam 1 (the direction perpendicular to the axial direction of the wooden beam 1 in a plane), but multiple damping members 2 may be provided in the width direction of the wooden beam 1. In this case, multiple grooves 11 are also formed in the width direction of the wooden beam 1 to match the number of damping members 2.

[0048] In this embodiment, a groove 11 is provided in the wooden beam 1 for each damping member 2, but it is also possible to provide a long groove 11 in the axial direction of the wooden beam 1, insert joining plates 22 of multiple damping members 2 into the groove 11, and fill it with adhesive 5.

[0049] Furthermore, in this embodiment, the damping members 2 are joined between the upper and lower wooden beams 1, but in cases where the wooden columns 3 are used as beams, it is also possible to place the damping members 2 between a pair of left and right wooden columns 3, as shown in Fig. 9. In this case, too, joining plates 22 at both ends of the damping members 2 are inserted into grooves formed on the opposing surfaces of the left and right wooden columns 3, and adhesive 5 is filled in, thereby forming a joint structure 10 similar to that described above. In the example of Fig. 9, multiple damping members 2 are provided at heights corresponding to the wooden beams 1 and at heights corresponding to the inter-story spaces, but the damping members 2 may be placed only at heights corresponding to the wooden beams 1, or only at heights corresponding to the inter-story spaces.

[0050] 10, one end of the damping member 2a is joined to the wooden beam 1 using a joint plate 22 (first joint plate) which is a joint (first joint) as described above, but the other end may be joined to the wooden beam 1 using a joint (second joint) such as a base plate 23 with screws or the like. This is also the case when the damping member 2 is provided between wooden columns 3 as shown in FIG.

[0051] As shown in Figure 11, a cross section of a wooden beam 1 perpendicular to its axial direction may have a sub-combustible layer 14 below the load-bearing portion 12 via a fire-retardant layer 13. The load-bearing portion 12 is the portion of the wooden beam 1 that primarily bears the load. The fire-retardant layer 13 is made of wood or gypsum board impregnated with a fire retardant, preventing the spread of fire to the load-bearing portion 12. The sub-combustible layer 14 is made of decorative material, etc., and is intended to burn in the event of a fire. In the example shown in Figure 11, a groove 11 is provided in the sub-combustible layer 14, and a connecting plate 22 for the damping member 2 is inserted into the groove. The damping member 2 is made of steel and acts as a thermal bridge in the event of a fire. However, a 60-minute fire resistance test conducted by the inventors showed that a 60-minute fire resistance (preventing fire from spreading to the load-bearing portion 12) can be achieved by setting the thickness d of the fire-retardant layer 13 to 10 mm or more. In addition, when the connecting plate 22 of the damping member 2 is inserted into the load-bearing portion 12, a 60-minute fire resistance test also conducted by the present inventors showed that the burning portion of the load-bearing portion 12 directly above the connecting plate 22 is about 15 mm, and it was found that it is sufficient to design the load-bearing portion 12 taking into account a burning margin of about 30 mm (the thickness of one lamina in laminated timber, etc.) in the vertical direction from the connecting plate 22.

[0052] In addition, in the above embodiments, a pair of wooden shaft members (wooden beams 1 or wooden pillars 3) are arranged with a gap in a direction perpendicular to the axial direction, and a damping member 2 is provided in the gap, but as shown in Figure 12, two wooden shaft members (wooden pillars 3 in the example of Figure 12) may be arranged with a gap in the axial direction, and a damping member 2 may be provided in the gap.

[0053] Although a steel damper is used as the damping member 2 in this embodiment, the damping member is not limited to this. For example, a friction damper can also be used as the damping member. FIG. 13 shows a simplified view of a damping member 2b, which is a friction damper. In this example, the damping section 21b includes a friction plate 211, a sliding plate 212, and a support plate 213, each made of resin or the like. One end of the sliding plate 212 slides on the friction plate 211 in response to displacement of the wooden frame, thereby converting vibration energy into frictional heat or the like to damp the vibration. Friction plates 211 are provided on both sides of the sliding plate 212, and these friction plates 211 are supported by support plates 213 on both sides of the sliding plate 212. The support plates 213 on both sides of the sliding plate 212 are connected via a connecting plate 22a. The other end (first connecting plate) of the sliding plate 212 and the connecting plate 22a (second connecting plate) function as connecting parts (first connecting part, second connecting part) for the wooden shaft member (wooden beam 1 in the example of Figure 13), and by inserting the other end of the sliding plate 212 and the connecting plate 22a into a groove 11 provided in the wooden shaft member and filling the groove 11 with adhesive 5, the damping member 2b can be connected to these wooden shaft members.

[0054] 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 and alterations within the scope of the technical ideas disclosed in this application, and it is understood that these modifications and alterations also fall within the technical scope of the present invention. [Explanation of symbols]

[0055] 1: Wooden beam 2, 2a, 2b: Damping members 3: Wooden pillar 5:Adhesive 10:Joint structure 11: Groove 21, 21b: damping section 22, 22a: Joint plate 211:Friction plate 212: Slide 221: Hole 222: Notch

Claims

1. A joint structure for joining a damping member to a pair of wooden shaft members which are wooden columns or wooden beams, A first joint plate, which is a first joint portion provided in the damping member, is inserted into a groove provided in one of the pair of wooden shaft members, The groove is filled with an adhesive material, A joint structure characterized in that the other of the pair of wooden shaft members is joined to a second joint portion provided on the damping member.

2. 2. The joining structure according to claim 1, wherein the first joining plate has holes, and the holes are filled with the adhesive.

3. the second bonding portion is a second bonding plate provided on the damping member, 2. The joining structure according to claim 1, wherein the second joining plate is inserted into a groove formed in the other wooden shaft member, and the groove is filled with adhesive.

4. The pair of wooden shaft members are arranged with a gap in a direction perpendicular to the axial direction, The joint structure according to claim 1 , wherein the damping member is disposed in the gap.

5. the first joining plate is disposed so that at least one side of the outer periphery of the plate surface is in contact with the inner surface of the groove; 2. The joining structure according to claim 1, wherein a notch is provided on the side.

6. 2. The joining structure according to claim 1, wherein the first joining plate has a surface provided with irregularities for improving adhesive strength with the adhesive material.

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