Vibration damping structure

Abstract

To provide a vibration control structure with superior vibration control performance.SOLUTION: In a structure comprising first and second wooden columns 2 and 3 extending in a first direction X1 and wooden upper and lower transverse beams UB and LB extending in a second direction X2 approximately perpendicular to the first direction X1 and fixed to the first and second columns 2 and 3, a vibration control structure 1 has a vibration control device 4 arranged between the first column 2 and the second column 3, each of the first and second columns 2, 3 is provided with a column body part 21, 31 fixed to each of the upper and lower transverse beams UB and LB, and a widened part 22, 32 formed integrally with the column body part 21, 31 and widened from the column body part 21, 31 toward the other column 2, 3, a space S is provided between the widened parts 22, 32 and each of the upper and lower transverse beams UB, LB, and the vibration control device 4 is joined to each of the widened parts 22, 32 of the first and second columns 2, 3.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a vibration damping structure.

Background Art

[0002] Conventionally, for the purpose of improving the seismic resistance and vibration damping performance of wooden buildings, a vibration damping device (vibration damping structure) as disclosed in Patent Document 1, for example, has been used. The vibration damping device of Patent Document 1 includes a transmission plate fixed to each of a pair of columns and a damper connecting the pair of transmission plates. The damper includes a metal plate fixed to each of the pair of transmission plates and a viscoelastic portion provided between the pair of superposed metal plates. In this vibration damping device, when a pair of columns incline due to an earthquake or the like, one of the pair of transmission plates and one of the pair of metal plates, and the other of the pair of transmission plates and the other of the pair of metal plates are displaced relative to each other in the direction in which the columns extend, so that the viscoelastic portion is sheared and the vibration energy is attenuated.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the vibration damping device of Patent Document 1, the force acting on the column due to an earthquake or the like is transmitted to the damper via the transmission plate. However, since the transmission plate is joined to the column via the auxiliary beam and play (deformation) occurs at this joint when the column is displaced, the amount of displacement of the column cannot be directly transmitted to the damper. Therefore, in the vibration damping device of Patent Document 1, the force acting on the column due to an earthquake or the like cannot be transmitted to the damper without loss, and sufficient vibration damping performance cannot be obtained.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a vibration damping structure having more excellent vibration damping performance.

Means for Solving the Problems

[0006] The vibration damping structure of the present invention is a structure including a wooden first pillar and a second pillar each extending in a first direction, and a wooden upper cross member and a lower cross member extending in a second direction substantially perpendicular to the first direction and fixed to the first and second pillars. In the structure, a vibration damping device is disposed between the first pillar and the second pillar. Each of the first and second pillars includes a pillar main body portion fixed to each of the upper and lower cross members, and a widened portion formed integrally with the pillar main body portion and widening from the pillar main body portion toward the other pillar. A space is provided between the widened portion and each of the upper and lower cross members, and the vibration damping device is characterized by being joined to the widened portion of each of the first and second pillars.

[0007] Further, the vibration damping device is joined to the widened portion of the first pillar via a first joining member made of metal, and joined to the widened portion of the second pillar via a second joining member made of metal. Each of the first and second joining members directly or indirectly abuts against the widened portion of each of the first and second pillars on both sides in the first direction, and is fixed to the widened portion of each of the first and second pillars so as to be pressed in a direction approaching each other with respect to the widened portion of each of the first and second pillars in the second direction.

[0008] Further, each of the first and second joining members is fixed to the widened portion of each of the first and second pillars by fixing bolts extending in the second direction, and it is preferable that a gap adjusting material is provided between the peripheral wall of the insertion hole of the widened portion of each of the first and second pillars into which the fixing bolts are inserted and the fixing bolts.

[0009] Further, each of the first and second joining members includes a main body portion fixed to a side surface of the widened portion of each of the first and second columns, a fixing portion extending from the main body portion toward the vibration damping device and fixed to the vibration damping device, and a pressing portion extending from the main body portion toward the widened portion of each of the first and second columns and embedded in the widened portion of each of the first and second columns. The main body portion of each of the first and second joining members is pressed in a direction approaching each other with respect to the widened portion of each of the first and second columns in the second direction and fixed to the side surface of the widened portion of each of the first and second columns. The pressing portion of each of the first and second joining members is preferably embedded in the widened portion of each of the first and second columns so as to directly or indirectly contact the widened portion of each of the first and second columns on both sides in the first direction.

[0010] Further, the column main body portions of each of the first and second columns are pressed in a direction approaching each other with respect to each of the upper and lower horizontal members in the first direction and fixed to each of the upper and lower horizontal members, and are preferably fitted to each of the upper and lower horizontal members so as to contact each of the upper and lower horizontal members on both sides in the second direction.

[0011] Further, the vibration damping device includes a first fixing plate directly or indirectly fixed to the widened portion of the first column, a second fixing plate directly or indirectly fixed to the widened portion of the second column, and a damper plate extending between the first fixing plate and the second fixing plate and formed of a low yield point steel material. The damper plate is preferably formed to be thinner toward the center portion of the damper plate in a plane including the first and second directions.

[0012] Further, the vibration damping structure includes an out-of-plane restraint member that suppresses deformation of the vibration damping device outward in a direction substantially perpendicular to the plane including the first and second directions, and the out-of-plane restraint member is connected to each of the widened portions of the first and second columns so as to abut on each of the widened portions of the first and second columns in a direction substantially perpendicular to the plane including the first and second directions, and it is preferable that the out-of-plane restraint member is rotatably connected to each of the widened portions of the first and second columns about an axis extending in a direction substantially perpendicular to the plane including the first and second directions.

Advantages of the Invention

[0013] According to the present invention, a vibration damping structure having more excellent vibration damping performance can be provided.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0015] Hereinafter, a vibration damping structure according to an embodiment of the present invention will be described with reference to the accompanying drawings. However, the embodiments shown below are merely examples, and the vibration damping structure of the present invention is not limited to the following examples.

[0016] The vibration control structure 1 of the present embodiment is incorporated into the structure of a wooden building and used mainly for the purpose of improving the seismic resistance and vibration control performance of the wooden building, as shown in FIG. 1. The structure into which the vibration control structure 1 is incorporated includes a wooden first column 2 and a second column 3 that each extend in a first direction X1 (the vertical direction in the illustrated example), and a wooden upper horizontal member UB and a lower horizontal member LB that extend in a second direction X2 (the horizontal direction in the illustrated example) substantially perpendicular to the first direction X1 and are fixed to the first and second columns 2 and 3.

[0017] The first and second columns 2 and 3 are provided so as to extend in the first direction X1 (the vertical direction in the illustrated example) and are members that support the load on the upper part of the wooden building. Further, the upper and lower horizontal members UB and LB are spanned in the lateral direction (the horizontal direction in the illustrated example) with respect to the first and second columns 2 and 3, support the load on the upper part of the wooden building, and are members that transmit the load on the upper part of the wooden building to the first and second columns 2 and 3. In the present embodiment, the upper horizontal member UB is a beam provided so as to extend horizontally on the upper side in the vertical direction with respect to the first and second columns 2 and 3, and the lower horizontal member LB is a beam or a base provided so as to extend horizontally on the lower side in the vertical direction with respect to the first and second columns 2 and 3.

[0018] As shown in FIG. 1, the vibration control structure 1 is disposed between the first column 2 and the second column 3 and includes a vibration control device 4 joined to the first and second columns 2 and 3, and attenuates the vibration energy generated in the structure of the wooden building by receiving disturbances such as seismic vibrations and wind. In the vibration control structure 1, the vibration energy generated in the structure is transmitted to the vibration control device 4 via the first and second columns 2 and 3, and the transmitted vibration energy is attenuated by the vibration control device 4.

[0019] As shown in FIG. 1, each of the first and second columns 2 and 3 includes a column main body portion 21 and 31 fixed to each of the upper and lower horizontal members UB and LB, and widened portions 22 and 32 formed integrally with the column main body portions 21 and 31 and widening from the column main body portions 21 and 31 toward the other column 2 and 3.

[0020] The column main body parts 21 and 31 of the first and second columns 2 and 3 are respectively fixed to the upper and lower horizontal girders UB and LB, and are parts that support the load on the upper part of the wooden building. Each of the column main body parts 21 and 31 is formed to extend along the first direction X1, one end (upper end) side in the first direction X1 is fixed to the upper horizontal girder UB, and the other end (lower end) side in the first direction X1 is fixed to the lower horizontal girder LB. Each of the column main body parts 21 and 31 is fixed to the upper and lower horizontal girders UB and LB so that when the upper and lower horizontal girders UB and LB are displaced in the second direction X2, the displacement of the upper and lower horizontal girders UB and LB is transmitted to each of the column main body parts 21 and 31. Note that the column main body parts 21 and 31 are not limited to the illustrated example, and may be formed to extend through the upper and lower horizontal girders UB and LB. In that case, the ends of the upper and lower horizontal girders UB and LB in the second direction X2 may be fixed to the column main body parts 21 and 31, or the upper and lower horizontal girders UB and LB may be fixed to the column main body parts 21 and 31 so as to penetrate the column main body parts 21 and 31.

[0021] In this embodiment, as shown in FIG. 1, the column main bodies 21 and 31 of the first and second columns 2 and 3 are pressed in a direction approaching each other with respect to the upper and lower horizontal members UB and LB in the first direction X1, and are fixed to the upper and lower horizontal members UB and LB respectively. That is, the column main bodies 21 and 31 and the upper and lower horizontal members UB and LB are fixed to each other so as to be pressed against each other in the first direction X1. As a result, even if a tensile force that tries to pull the column main bodies 21 and 31 away from each other in the first direction X1 is generated between the column main bodies 21 and 31 and the upper and lower horizontal members UB and LB, the relative movement of the column main bodies 21 and 31 in the first direction X1 with respect to the upper and lower horizontal members UB and LB is suppressed by resisting the tensile force. Thereby, even if the upper and lower horizontal members UB and LB are displaced in the second direction X2, the relative movement of the column main bodies 21 and 31 in the first direction X1 with respect to the upper and lower horizontal members UB and LB is suppressed. When the displacements of the upper and lower horizontal members UB and LB are transmitted to the column main bodies 21 and 31, the transmission loss is suppressed and the displacement is transmitted more accurately.

[0022] It suffices that each of the column main body portions 21 and 31 and each of the upper and lower horizontal members UB and LB can be fixed to be pressed against each other in the first direction X1, and the fixing method is not particularly limited. In the present embodiment, as shown in FIG. 1, each of the column main body portions 21 and 31 and each of the upper and lower horizontal members UB and LB are fixed by a fixture B1. In the present embodiment, the fixture B1 is a combination of a fixing bolt and a nut that extends through at least a part of each of the column main body portions 21 and 31 and each of the upper and lower horizontal members UB and LB along the first direction X1. The fixture B1 is provided to extend along the first direction X1 from the end faces on the opposite sides of each of the upper and lower horizontal members UB and LB with respect to each of the column main body portions 21 and 31, through the upper and lower end faces of each of the column main body portions 21 and 31, to the cavities 21a and 31a formed inside each of the column main body portions 21 and 31 in the first direction X1. The fixture B1 fixes by pulling each of the column main body portions 21 and 31 and each of the upper and lower horizontal members UB and LB closer to each other in the first direction X1 by tightening the fixing bolt and the nut against each other. However, it suffices that the fixture B1 can pull each of the column main body portions 21 and 31 and each of the upper and lower horizontal members UB and LB closer to each other in the direction of approaching each other and fix them, and other than the combination of the fixing bolt and the nut, for example, a screw extending along the first direction X1 may be used.

[0023] The column main body parts 21 and 31 of the first and second columns 2 and 3 are further fitted to the upper and lower horizontal members UB and LB, respectively, so as to abut on the upper and lower horizontal members UB and LB on both sides in the second direction X2 as shown in FIG. 1. That is, there is no clearance provided between each of the column main body parts 21 and 31 and each of the upper and lower horizontal members UB and LB in the second direction X2, and each of the column main body parts 21 and 31 and each of the upper and lower horizontal members UB and LB are fitted to each other. Thereby, when each of the upper and lower horizontal members UB and LB is displaced in the second direction X2, the relative movement between each of the column main body parts 21 and 31 and each of the upper and lower horizontal members UB and LB in the second direction X2 is suppressed. Therefore, when the displacement of each of the upper and lower horizontal members UB and LB in the second direction X2 is transmitted to each of the column main body parts 21 and 31, the loss of transmission is suppressed and the displacement is transmitted more accurately. In the present embodiment, as shown in FIG. 1, the convex portions 21b and 31b provided on each of the column main body parts 21 and 31 are fitted into the concave portions UB1 and LB1 provided on each of the upper and lower horizontal members UB and LB, whereby each of the column main body parts 21 and 31 and each of the upper and lower horizontal members UB and LB are fitted to each other. However, a concave portion may be provided on each of the column main body parts 21 and 31, a convex portion may be provided on each of the upper and lower horizontal members UB and LB, and each of the column main body parts 21 and 31 and each of the upper and lower horizontal members UB and LB may be fitted to each other by fitting the convex portions of each of the upper and lower horizontal members UB and LB into the concave portions of each of the column main body parts 21 and 31.

[0024] The widened portions 22, 32 of the first and second columns 2, 3 extend in the second direction X2 toward the other column 2, 3 on the other side of the first and second columns 2, 3, and are formed integrally and continuously with the column main body portions 21, 31 of the first and second columns 2, 3, respectively. The widened portions 22, 32 are joined to the vibration damping device 4 and support the vibration damping device 4 with respect to the column main body portions 21, 31. The widened portions 22, 32 transmit the vibration energy transmitted through the column main body portions 21, 31 to the vibration damping device 4. By joining the vibration damping device 4 to the widened portions 22, 32 formed integrally and continuously with the column main body portions 21, 31, compared with the case where the column and the vibration damping device are joined through a separate member such as a transmission plate as in the prior art, the loss of transmission of vibration energy is suppressed, and the vibration energy can be transmitted more accurately.

[0025] The shapes of the widened portions 22 and 32 are not particularly limited as long as they can support the vibration damping device 4 with respect to the column main body portions 21 and 31 and transmit the vibration energy transmitted through the column main body portions 21 and 31 to the vibration damping device 4. In the present embodiment, each of the widened portions 22 and 32 extends along the first direction X1 together with each of the column main body portions 21 and 31, and a space S is provided between each of the widened portions 22 and 32 and each of the upper and lower horizontal members UB and LB in the first direction X1. By providing the space S between the widened portions 22 and 32 and the upper and lower horizontal members UB and LB in this way, when the upper and lower horizontal members UB and LB are relatively displaced with respect to each other in the second direction X2 and the first and second columns 2 and 3 tilt in the plane including the first and second directions X1 and X2 along with the relative displacement, it is suppressed that the widened portions 22 and 32 contact or intrude into the upper and lower horizontal members UB and LB in the first direction X1. Thereby, it is possible to suppress the deformation of the upper and lower horizontal members UB and LB due to the contact or intrusion of the widened portions 22 and 32, so that the strength of the upper and lower horizontal members UB and LB can be maintained. Further, since the contact between the widened portions 22 and 32 and the upper and lower horizontal members UB and LB in the first direction X1 is suppressed, the resistance of the widened portions 22 and 32 against the shearing force in the first direction X1 is suppressed, so that it is suppressed that the displacement of the first and second columns 2 and 3 is hindered in conjunction with the relative displacement of the upper and lower horizontal members UB and LB. Thereby, the relative displacement of the upper and lower horizontal members UB and LB in the second direction X2 can be transmitted to the first and second columns 2 and 3 more accurately.

[0026] Each widened portion 22, 32 can be appropriately sized within a range where they do not interfere with each other in the structure according to the distance in the first direction X1 between the upper horizontal member UB and the lower horizontal member LB in the structure, the distance in the second direction X2 between the first column 2 and the second column 3 in the structure, and the lengths of the vibration damping devices 4 in the first and second directions X1, X2 designed according to the required vibration damping performance. Among them, it is preferable that the sizes of the widened portions 22, 32 are set so that damage and the like are suppressed when transmitting the vibration energy transmitted from the respective column main bodies 21, 31 to the vibration damping devices 4. For example, from the perspective of countering the moment received by the widened portions 22, 32 when the upper and lower horizontal members UB, LB move relative to each other in the second direction X2, the length in the second direction X2 is the longest at the joint portion with the vibration damping device 4 in the first direction X1, and the length in the second direction X2 continuously shortens as it approaches each of the upper and lower horizontal members UB, LB (substantially trapezoidal shape in front view), and it is preferably designed to be larger. For example, in the present embodiment, the length of each widened portion 22, 32 in the second direction X2 has a substantially constant length over the entire length in the first direction X1. Also, from the perspective of ensuring the strength of the joint portion with the vibration damping device 4, the length of each widened portion 22, 32 in the first direction X1 is preferably at least longer than the length of the vibration damping device 4 in the first direction X1. Further, from the perspective of countering the moment received by the widened portions 22, 32 when the upper and lower horizontal members UB, LB are displaced relative to each other in the second direction X2, while ensuring the minimum necessary space S between the upper and lower horizontal members UB, LB, it preferably has a length over substantially the entire length of the interval in the first direction X1 between the upper horizontal member UB and the lower horizontal member LB. Note that the length of the space S in the first direction X1 can be appropriately set within a range where the respective widened portions 22, 32 do not contact the upper and lower horizontal members UB, LB when the upper and lower horizontal members UB, LB are displaced relative to each other in the second direction X2.

[0027] As shown in Fig. 1, the vibration damping device 4 is joined to the widened portions 22, 32 of the first and second columns 2, 3 respectively, and attenuates the vibration energy transmitted from the upper and lower horizontal members UB, LB through the widened portions 22, 32 of the first and second columns 2, 3 respectively. By being joined to the widened portions 22, 32 which are part of the first and second columns 2, 3, the vibration damping device 4 suppresses the loss of vibration energy transmission when vibration energy is transmitted from the first and second columns 2, 3, compared with the case where the vibration damping device and the column are joined via a separate member such as a transmission plate as in the prior art, and the vibration energy is transmitted more accurately. Thereby, the vibration damping structure 1 of the present embodiment can exhibit excellent vibration damping performance.

[0028] The configuration of the vibration damping device 4 is not particularly limited as long as it can attenuate the transmitted vibration energy. As the vibration damping device 4, for example, a known steel damper, lead damper, viscoelastic damper, oil damper, etc. can be adopted. In the present embodiment, as shown in Figs. 2 to 4, the vibration damping device 4 includes a first fixing plate 41 that is directly or indirectly fixed to the widened portion 22 of the first column 2 via a first joining member 5 described later, a second fixing plate 42 that is directly or indirectly fixed to the widened portion 32 of the second column 3 via a second joining member 6 described later, and a damper plate 43 that extends between the first fixing plate 41 and the second fixing plate 42 and is formed of a low yield point steel material. In the vibration damping device 4 of the present embodiment, when vibration energy is transmitted, the damper plate 43 plastically deforms, thereby attenuating the vibration energy. In a wooden building, larger deformations occur than in a steel-framed building, but by providing the damper plate 43 formed of a low yield point steel material as in the present embodiment, it is possible to follow such large deformations and attenuate the vibration energy.

[0029] The first and second fixing plates 41 and 42 are respectively fixed directly or indirectly to the widened portions 22 and 32 of the first and second columns 2 and 3, and transmit the vibration energy transmitted through the widened portions 22 and 32 to the damper plate 43. In this embodiment, the first and second fixing plates 41 and 42 are each formed in a plate shape extending along the first and second directions X1 and X2 as shown in FIGS. 2 to 4. The first and second fixing plates 41 and 42 only need to have a strength such that they do not plastically deform before the damper plate 43 plastically deforms when vibration energy is transmitted through the widened portions 22 and 32 of the first and second columns 2 and 3, and are not particularly limited, but can be formed of, for example, ordinary steel having a yield point higher than that of the damper plate 43.

[0030] When vibration energy is transmitted through the first and second fixed plates 41 and 42, the damper plate 43 plastically deforms preferentially over the first and second fixed plates 41 and 42 to attenuate the vibration energy. For example, in FIG. 1, when the upper and lower horizontal members UB and LB are displaced relative to each other in the second direction X2, both the first and second columns 2 and 3 rotate (tilt) relative to the upper and lower horizontal members UB and LB in a plane including the first and second directions X1 and X2, and accordingly, the damper plate 43 is subjected to a shearing force along the extending directions of the first and second columns 2 and 3. The damper plate 43 plastically deforms when subjected to a shearing force equal to or greater than a predetermined value to attenuate the vibration energy. In the present embodiment, as shown in FIGS. 2 and 3, the damper plate 43 is formed in a plate shape extending along the first and second directions X1 and X2, and is formed to be thinner toward the central portion of the damper plate 43 in the plane including the first and second directions X1 and X2 (see the thin portion 43a). Thereby, when vibration energy is transmitted to the damper plate 43, stress can be dispersed throughout the damper plate 43, and concentration of stress in the vicinity of the connection portions of the damper plate 43 with the first and second fixed plates 41 and 42 can be suppressed. Therefore, local breakage in the vicinity of the connection portions of the damper plate 43 with the first and second fixed plates 41 and 42 is suppressed.

[0031] In the present embodiment, as shown in FIG. 2, the damper plate 43 has a shape in which the length in the first direction X1 and the length in the second direction X2 are substantially equal in a front view (substantially square shape in the illustrated example). In this way, since the damper plate 43 has substantially the same length in the first direction X1 in which the first and second columns 2 and 3 extend and the second direction X2 in which the upper and lower horizontal members UB and LB extend, when the relative displacement in the second direction X2 of the upper and lower horizontal members UB and LB is converted into and transmitted as the relative displacement in the first direction X1 of the first and second columns 2 and 3 as in the vibration damping structure 1 of the present embodiment, it is possible to more advantageously follow the displacement and attenuate the vibration energy. From such a viewpoint, the ratio of the length in the first direction X1 to the length in the second direction X2 of the damper plate 43 is preferably in the range of 0.5:1 to 1.5:1, and more preferably in the range of 0.8:1 to 1.2:1. In the present embodiment, with the damper plate 43 being formed in a shape in which the length in the first direction X1 and the length in the second direction X2 are substantially equal, the thin portion 43a of the damper plate 43 is also formed in a shape in which the length in the first direction X1 and the length in the second direction X2 are substantially equal (substantially circular shape in the illustrated example). The substantially circular thin portion 43a is formed to be thinner toward the center of the substantially circle.

[0032] In the present embodiment, as shown in FIGS. 1 and 2, the vibration damping device 4 is joined to the widened portion 22 of the first column 2 via a metal first joining member 5 and joined to the widened portion 32 of the second column 3 via a metal second joining member 6. Therefore, the vibration energy is transmitted to the vibration damping device 4 via the first and second joining members 5 and 6, and the transmitted vibration energy is attenuated.

[0033] The first and second joining members 5 and 6 respectively join the widened portions 22 and 32 of the first and second columns 2 and 3 to the vibration damping device 4, and transmit the vibration energy transmitted from the upper and lower horizontal members UB and LB to the widened portions 22 and 32 of the first and second columns 2 and 3 to the vibration damping device 4. As shown in FIGS. 1 and 2, each of the first and second joining members 5 and 6 is fixed to the widened portions 22 and 32 of the first and second columns 2 and 3 so as to be pressed in a direction approaching each other with respect to the widened portions 22 and 32 of the first and second columns 2 and 3 in the second direction X2. Thereby, even if a tensile force that tries to pull the first and second joining members 5 and 6 away from each other in the second direction X2 is generated between the first and second joining members 5 and 6 and the widened portions 22 and 23 of the first and second columns 2 and 3, the relative movement of the first and second joining members 5 and 6 in the second direction X2 with respect to the first and second columns 2 and 3 is suppressed by resisting the tensile force. For example, when the upper horizontal member UB and the lower horizontal member LB are relatively displaced in the second direction X2, the first and second columns 2 and 3 relatively rotate (tilt in the second direction X2) with respect to the upper and lower horizontal members UB and LB within the plane (the plane of FIGS. 1 and 2) including the first and second directions X1 and X2. Along with such displacement of the first and second columns 2 and 3, a force is applied to the first and second joining members 5 and 6 within the plane (the plane of FIGS. 1 and 2) including the first and second directions X1 and X2 in a direction in which the first and second joining members 5 and 6 relatively rotate with respect to the widened portions 22 and 32 of the first and second columns 2 and 3. If the first and second joining members 5 and 6 relatively rotate with respect to the widened portions 22 and 32 of the first and second columns 2 and 3, the displacement of the upper and lower horizontal members UB and LB cannot be accurately transmitted to the first and second joining members 5 and 6 through the widened portions 22 and 32 of the first and second columns 2 and 3.In contrast, in the present embodiment, since the relative movement of the first and second joint members 5 and 6 in the second direction X2 with respect to the widened portions 22 and 32 of the first and second columns 2 and 3 is suppressed, the relative rotation of the first and second joint members 5 and 6 with respect to the widened portions 22 and 32 of the first and second columns 2 and 3 is suppressed. When transmitting the displacement of the upper and lower horizontal members UB and LB from the widened portions 22 and 32 of the first and second columns 2 and 3 to the first and second joint members 5 and 6, the loss of transmission can be suppressed, and the displacement can be transmitted more accurately.

[0034] Furthermore, each of the first and second joint members 5 and 6 is fixed to the widened portions 22 and 32 of the first and second columns 2 and 3 so as to directly or indirectly contact the widened portions 22 and 32 of the first and second columns 2 and 3 on both sides in the first direction X1. That is, the first and second joint members 5 and 6 are fixed to the widened portions 22 and 32 of the first and second columns 2 and 3 without providing a clearance between the first and second joint members 5 and 6 and the widened portions 22 and 32 of the first and second columns 2 and 3 in the first direction X1. Thereby, when the first and second columns 2 and 3 relatively rotate (tilt) in the plane including the first and second directions X1 and X2 along with the relative displacement of the upper and lower horizontal members UB and LB in the second direction X2, the relative movement between the first and second joint members 5 and 6 and the widened portions 22 and 32 of the first and second columns 2 and 3 in the extending direction of the first and second columns 2 and 3 is suppressed. Therefore, the loss when transmitting the relative displacement of the upper and lower horizontal members UB and LB in the second direction X2 to the first and second joint members 5 and 6 can be suppressed, and the displacement can be transmitted more accurately.

[0035] As described above, each of the first and second joining members 5 and 6 abuts directly or indirectly against the widened portions 22 and 32 of the first and second columns 2 and 3, respectively, on both sides in the first direction X1, and is pressed in a direction approaching each other with respect to the widened portions 22 and 32 of the first and second columns 2 and 3 in the second direction X2. It may be fixed to the widened portions 22 and 32 of the first and second columns 2 and 3, respectively, and its configuration and fixing method are not particularly limited. In the present embodiment, as shown in FIGS. 2 to 4, each of the first and second joining members 5 and 6 includes a main body portion 51 and 61 fixed to the side surfaces of the widened portions 22 and 32 of the first and second columns 2 and 3, respectively, and fixing portions 52 and 62 fixed to the vibration damping device 4. Each of the first and second joining members 5 and 6 may include pressing portions 53 and 63 in addition to the main body portions 51 and 61 and the fixing portions 52 and 62 as in another embodiment shown in FIGS. 5 to 7. Each of the first and second joining members 5 and 6 has the main body portions 51 and 61 and the fixing portions 52 and 62 (and optionally the pressing portions 53 and 63) integrally formed. Further, each of the first and second joining members 5 and 6 may include ribs 54 and 64 extending along the second and third directions X2 and X3 and connected between the main body portions 51 and 61 and the fixing portions 52 and 62. By providing the ribs 54 and 64, the first and second joining members 5 and 6 suppress deformation of the main body portions 51 and 61 in the second direction X2 and the like, and deformation of the fixing portions 52 and 62 in the third direction X3 and the like. The first and second joining members 5 and 6 only need to be formed of a metal having a strength that does not deform until the vibration damping device 4 deforms at least when transmitting vibration energy, and are not particularly limited, but can be formed of a hard metal material such as a steel material, for example.

[0036] As shown in FIGS. 2 to 4 and FIGS. 5 to 7, the main body portions 51 and 61 of the first and second joining members 5 and 6 are the portions fixed to the side surfaces of the widened portions 22 and 32 of the first and second columns 2 and 3, respectively. The main body portions 51 and 61 of the first and second joining members 5 and 6 are pressed in a direction approaching each other with respect to the widened portions 22 and 32 of the first and second columns 2 and 3 in the second direction X2, and are fixed to the side surfaces of the widened portions 22 and 32 of the first and second columns 2 and 3, respectively. Thereby, even if a tensile force that tries to pull the first and second joining members 5 and 6 including the main body portions 51 and 61 away from each other in the second direction X2 is generated between the widened portions 22 and 23 of the first and second columns 2 and 3, the relative movement of the first and second joining members 5 and 6 in the second direction X2 with respect to the first and second columns 2 and 3 is suppressed by resisting the tensile force. Therefore, as described above, it is possible to suppress the loss when transmitting the relative displacement of the upper and lower horizontal members UB and LB in the second direction X2 to the first and second joining members 5 and 6, and to transmit the displacement more accurately.

[0037] The main bodies 51 and 61 of the first and second joint members 5 and 6 may be fixed to the widened portions 22 and 23 of the first and second columns 2 and 3, respectively, so as to be pressed in the second direction X2 against at least the widened portions 22 and 23 of the first and second columns 2 and 3. The shape and the fixing method thereof are not particularly limited. In this embodiment, as shown in FIGS. 2 to 4 and FIGS. 5 to 7, the main bodies 51 and 61 are formed in a plate shape extending along the first and third directions X1 and X3, and are arranged so as to abut against the side surfaces of the widened portions 22 and 32 of the first and second columns 2 and 3 in the second direction X2. The main bodies 51 and 61 are fixed to the side surfaces of the widened portions 22 and 32 of the first and second columns 2 and 3 by the fixing tools B2. In this embodiment, the fixing tool B2 is a combination of a fixing bolt and a nut that extends through the main bodies 51 and 61 and the first and second columns 2 and 3 along the second direction X2. The fixing tool B2 fixes the respective main bodies 51 and 61 and the respective widened portions 22 and 23 by tightening the fixing bolt and the nut together to draw them closer to each other in the second direction. Note that the fixing tool B2 only needs to be able to draw the respective main bodies 51 and 61 and the respective widened portions 22 and 23 closer to each other in the second direction and fix them. In addition to the combination of the fixing bolt and the nut, for example, a screw extending along the second direction X2 may be used.

[0038] As described above, each of the first and second joint members 5 and 6 is fixed to the widened portions 22 and 32 of the first and second columns 2 and 3, respectively, by fixing bolts (fasteners B2) extending in the second direction X2. For example, as shown in FIGS. 2 and 3, a gap adjusting material G1 may be provided between the peripheral walls of the insertion holes H and H of the widened portions 22 and 32 of the first and second columns 2 and 3 into which the fixing bolts B2 are inserted and the fixing bolts B2. Thereby, the fixing bolts B2 are fixed to the widened portions 22 and 32 of the first and second columns 2 and 3, respectively, so as to indirectly contact the widened portions 22 and 32 of the first and second columns 2 and 3 via the gap adjusting material G1 at least on both sides in the first direction X1. Here, when the fixing bolt B2 made of metal comes into contact with and is fixed to each of the first and second joint members 5 and 6 made of metal, a strong frictional joint occurs between them. Due to this frictional joint, the first and second joint members 5 and 6 are substantially integrated with the fixing bolt B2 so that relative movement with respect to the fixing bolt B2 is suppressed in the direction in which the frictional force due to the frictional joint resists. And the fixing bolt B2 substantially integrated with the first and second joint members 5 and 6 indirectly contacts the widened portions 22 and 32 of the first and second columns 2 and 3 via the gap adjusting material G1. That is, it can be said that the first and second joint members 5 and 6 substantially integrated with the fixing bolt B2 are fixed to the widened portions 22 and 32 of the first and second columns 2 and 3, respectively, so as to indirectly contact the widened portions 22 and 32 of the first and second columns 2 and 3 via the fixing bolt B2 and the gap adjusting material G1 at least on both sides in the first direction X1. Therefore, as described above, when the first and second columns 2 and 3 relatively rotate (tilt) in the plane including the first and second directions X1 and X2 along with the relative displacement of the upper and lower horizontal members UB and LB in the second direction X2, the relative movement between the first and second joint members 5 and 6 and the widened portions 22 and 32 of the first and second columns 2 and 3 in the extending direction of the first and second columns 2 and 3 is suppressed. Thus, the loss when transmitting the relative displacement in the second direction X2 of the upper and lower horizontal members UB and LB to the first and second joint members 5 and 6 can be suppressed, and the displacement can be transmitted more accurately.

[0039] The gap adjusting member G1 only needs to be able to fill the gaps generated between the fixing bolts B2 on both sides in the first direction X1 and the respective widened portions 22, 32 of the first and second columns 2, 3, and its constituent material is not particularly limited. The gap adjusting member G1 can be constituted by a known resin such as an epoxy resin, for example. After the fixing bolts B2 are inserted into the insertion holes H of the respective widened portions 22, 32 of the first and second columns 2, 3, the gap adjusting member G1 can be inserted into the gaps generated between the fixing bolts B2 on both sides in the first direction X1 and the respective widened portions 22, 32 of the first and second columns 2, 3.

[0040] As shown in FIGS. 2 to 4 and FIGS. 5 to 7, the respective fixing portions 52, 62 of the first and second joining members 5, 6 extend from the main body portions 51, 61 toward the vibration damping device 4 and are the portions fixed to the vibration damping device 4. The fixing portions 52, 62 are fixed to the vibration damping device 4 so as to suppress relative movement with respect to the vibration damping device 4. Thereby, when the first and second joining members 5, 6 including the fixing portions 52, 62 transmit the displacement transmitted to the first and second joining members 5, 6 to the vibration damping device 4, the loss of transmission can be suppressed and the displacement can be transmitted more accurately.

[0041] The fixing parts 52 and 62 only need to be fixed to the vibration damping device 4 so that relative movement with respect to the vibration damping device 4 is suppressed, and their shapes and fixing methods are not particularly limited. In the present embodiment, as shown in FIGS. 2 to 4 and FIGS. 5 to 7, the fixing parts 52 and 62 are formed in a plate shape extending along the first and second directions X1 and X2, and are erected along the second direction X2 from the approximate center in the third direction X3 of the main body parts 51 and 61. Each of the fixing parts 52 and 62 is fixed to each of the first and second fixing plates 41 and 42 of the vibration damping device 4 by a fixture B3 such as a combination of a bolt and a nut that penetrates the fixing parts 52 and 62 and the first and second fixing plates 41 and 42 along the third direction X3. Here, the fixing parts 52 and 62 and the first and second fixing plates 41 and 42 are both made of metal, and are butted against each other and firmly fixed with a high-tensile bolt or the like, so that they are frictionally joined to each other and relative movement with respect to each other is suppressed.

[0042] As described above, each of the first and second joint members 5 and 6 may be provided with pressing portions 53 and 63 as shown in FIGS. 5 and 6. The pressing portions 53 and 63 of the first and second joint members 5 and 6 extend from the main body portions 51 and 61 toward the widened portions 22 and 32 of the first and second columns 2 and 3, respectively, and are portions to be embedded in the widened portions 22 and 23 of the first and second columns 2 and 3, respectively. The pressing portions 53 and 63 of the first and second joint members 5 and 6 are embedded in the widened portions 22 and 32 of the first and second columns 2 and 3, respectively, so as to directly or indirectly contact the widened portions 22 and 32 of the first and second columns 2 and 3 on both sides in the first direction X1. That is, the pressing portions 53 and 63 are embedded in the widened portions 22 and 32 of the first and second columns 2 and 3 without providing a clearance between the pressing portions 53 and 63 and the widened portions 22 and 32 of the first and second columns 2 and 3 in the first direction X1. Thereby, when the first and second columns 2 and 3 relatively rotate (tilt) in the plane including the first and second directions X1 and X2 along with the relative displacement of the upper and lower horizontal members UB and LB in the second direction X2, the relative movement between the first and second joint members 5 and 6 and the widened portions 22 and 32 of the first and second columns 2 and 3 in the extending direction of the first and second columns 2 and 3 is suppressed. Therefore, it is possible to suppress the loss when transmitting the relative displacement in the second direction X2 of the upper and lower horizontal members UB and LB to the first and second joint members 5 and 6, and the displacement can be transmitted more accurately.

[0043] The bearing pressure portions 53 and 63 may be configured to be embedded in the widened portions 22 and 32 of the first and second columns 2 and 3, respectively, so as to directly or indirectly contact the widened portions 22 and 32 of the first and second columns 2 and 3 at least on both sides in the first direction X1. The shape and the embedding method thereof are not particularly limited. In the present embodiment, as shown in FIGS. 5 and 6, the bearing pressure portions 53 and 63 are formed to extend in a direction substantially perpendicular (third direction X3) to the plane including the first and second directions X1 and X2. That is, the bearing pressure portions 53 and 63 are formed to expand within the plane including the second and third directions X2 and X3. By forming the bearing pressure portions 53 and 63 to expand within the plane including the second and third directions X2 and X3 that are substantially perpendicular to the first direction X1, the bearing pressure portions 53 and 63 can strongly resist the shearing force along the first direction X1 received from the widened portions 22 and 32 of the first and second columns 2 and 3, be displaced together with the widened portions 22 and 32 while suppressing deformation, and more accurately transmit the displacement in the second direction X2 of the upper and lower horizontal members UB and LB transmitted through the widened portions 22 and 32 of the first and second columns 2 and 3. Further, by forming the bearing pressure portions 53 and 63 to extend along the third direction X3, the resistance to the shearing force in the first direction X1 can be increased, so that the length in the second direction X2 can be shortened. Thereby, the embedding recesses provided in the widened portions 22 and 32 of the first and second columns 2 and 3 can be made shallower, and the strength of the widened portions 22 and 32 of the first and second columns 2 and 3 can be kept high.

[0044] In this embodiment, as shown in FIG. 5, the bearing portions 53 and 63 of the first and second joining members 5 and 6 are embedded in the widened portions 22 and 32 of the first and second columns 2 and 3, respectively, so as to indirectly contact the widened portions 22 and 32 of the first and second columns 2 and 3 via the gap adjusting material G2 on both sides in the first direction X1. By using the gap adjusting material G2 to bring the bearing portions 53 and 63 into contact with the widened portions 22 and 32 of the first and second columns 2 and 3 on both sides in the first direction X1, precise design accuracy is not required for the bearing portions 53 and 63 and the embedding recesses of the widened portions 22 and 32 of the first and second columns 2 and 3 in which the bearing portions 53 and 63 are embedded. Therefore, the bearing portions 53 and 63 and the widened portions 22 and 32 of the first and second columns 2 and 3 can be manufactured inexpensively and easily. However, the bearing portions 53 and 63 may be embedded in the widened portions 22 and 32 of the first and second columns 2 and 3 so as to directly contact the widened portions 22 and 32 of the first and second columns 2 and 3 on both sides in the first direction X1 without passing through the gap adjusting material G2.

[0045] The gap adjusting material G2 only needs to be able to fill the gap generated between the bearing portions 53 and 63 on both sides in the first direction X1 and the widened portions 22 and 32 of the first and second columns 2 and 3, and its constituent material is not particularly limited. The gap adjusting material G2 can be constituted by a known resin such as an epoxy resin, for example. The gap adjusting material G2 can be inserted into the gap generated between the bearing portions 53 and 63 on both sides in the first direction X1 and the widened portions 22 and 32 of the first and second columns 2 and 3, for example, after the bearing portions 53 and 63 are inserted into the embedding recesses of the widened portions 22 and 32 of the first and second columns 2 and 3.

[0046] As shown in FIGS. 1 and 8, the vibration damping structure 1 may include an out-of-plane restraint member 7 that suppresses deformation of the vibration damping device 4 outward in a direction substantially perpendicular (the third direction X3) to the plane including the first and second directions X1 and X2. In the illustrated example, the out-of-plane restraint member 7 is connected to the widened portions 22 and 32 of the first and second columns 2 and 3, respectively, so as to contact the widened portions 22 and 32 of the first and second columns 2 and 3 in a direction substantially perpendicular (the third direction X3) to the plane including the first and second directions X1 and X2. Thereby, when the first and second columns 2 and 3 tend to move relative to each other in the third direction X3, the out-of-plane restraint member 7 becomes an obstacle to the relative movement, so that the out-of-plane restraint member 7 can suppress the deformation of the vibration damping device 4 in the third direction X3 accompanying the relative movement of the widened portions 22 and 32 of the first and second columns 2 and 3 in the third direction X3. By suppressing the deformation of the vibration damping device 4 in the third direction X3 in this way, the vibration damping performance of the vibration damping device 4 can be maintained.

[0047] The out-of-plane restraint member 7 only needs to be able to suppress the relative movement of the widened portions 22 and 32 of the first and second columns 2 and 3 in the third direction X3 and suppress the deformation of the vibration damping device 4 in the third direction X3, and its shape is not particularly limited. In this embodiment, as shown in FIGS. 1 and 8, the out-of-plane restraint member 7 is formed to be in surface contact with the surfaces of the widened portions 22 and 32 of the first and second columns 2 and 3 in the third direction X3 in a plane substantially perpendicular to the third direction X3. By being in surface contact with the widened portions 22 and 32 of the first and second columns 2 and 3 in a plane substantially perpendicular to the third direction X3, the out-of-plane restraint member 7 increases the resistance to the relative movement of the widened portions 22 and 32 of the first and second columns 2 and 3 in the third direction X3, and can more reliably suppress the relative movement of the widened portions 22 and 32 of the first and second columns 2 and 3 in the third direction X3. The out-of-plane restraint member 7 preferably has a strength to resist the pressing force received from the widened portions 22 and 32 of the first and second columns 2 and 3 in the third direction X3 when the widened portions 22 and 32 of the first and second columns 2 and 3 tend to move relative to each other in the third direction X3, and is preferably formed of a hard material such as a steel material.

[0048] The out-of-plane restraint member 7 is further rotatably connected to the widened portions 22 and 32 of the first and second columns 2 and 3, respectively, about axes Y1 and Y2 extending in a direction substantially perpendicular (third direction X3) to the plane including the first and second directions X1 and X2. Thereby, when the upper and lower horizontal members UB and LB relatively move with respect to each other in the second direction X2, and accordingly, the widened portions 22 and 32 of the first and second columns 2 and 3 tend to relatively rotate (tilt) within the plane including the first and second directions X1 and X2, the out-of-plane restraint member 7 relatively rotates about the axes Y1 and Y2 extending in the third direction X3 with respect to the widened portions 22 and 32 of the first and second columns 2 and 3, thereby suppressing the regulation of the relative rotation of the widened portions 22 and 32 of the first and second columns 2 and 3. Therefore, the relative displacement in the second direction X2 of the upper and lower horizontal members UB and LB transmitted to the widened portions 22 and 32 of the first and second columns 2 and 3 can be transmitted more accurately to the first and second joining members 5 and 6 and the vibration damping device 4.

[0049] In this embodiment, as shown in FIG. 8, the out-of-plane restraint member 7 is provided on both surface sides in the third direction X3 of the widened portions 22 and 32 of the first and second columns 2 and 3. The out-of-plane restraint members 7 on both sides are pivotally supported by each other about a common axis Y1 at the widened portion 22 of the first column 2, and are pivotally supported by each other about a common axis Y2 at the widened portion 32 of the second column 3. By providing the out-of-plane restraint member 7 on both sides in the third direction X3 of the widened portions 22 and 32 of the first and second columns 2 and 3, the relative movement in the third direction X3 of the widened portions 22 and 32 of the first and second columns 2 and 3 can be more reliably suppressed.

Explanation of Reference Numerals

[0050] 1 Vibration damping structure 2 First column 21 Column main body portion 21a Cavity 21b Protrusion 22 Widened portion 3 Second column 31 Column main body portion 31a Cavity 31b Protrusion 32 Widened portion 4 Vibration damping device 41 First fixing plate 42 Second fixing plate 43 Damper plate 43a Thin part 5 First joining member 51 Body part 52 Fixing part 53 Pressing part 54 Rib 6 Second joining member 61 Body part 62 Fixing part 63 Pressing part 64 Rib 7 Out-of-plane restraint member B1, B2, B3 Fixtures G1, G2 Clearance adjusters H Insertion hole LB Lower horizontal member LB1 Recess S Space UB Upper horizontal member UB1 Recess X1 First direction X2 Second direction X3 Third direction Y1, Y2 Axes

Claims

1. In a structure including a first wooden column and a second wooden column each extending in a first direction, and an upper horizontal member and a lower horizontal member made of wood that extend in a second direction substantially perpendicular to the first direction and are fixed to the first and second columns, a vibration damping structure in which a vibration damping device is disposed between the first column and the second column, wherein each of the first and second columns, has a column main body portion fixed to each of the upper and lower horizontal members, and an expanding portion formed integrally with the column main body portion and expanding from the column main body portion toward the other column, and includes, a space is provided between the expanding portion and each of the upper and lower horizontal members, the vibration damping device is joined to the expanding portion of each of the first and second columns, the vibration damping device is joined to the expanding portion of the first column via a first joining member made of metal, and is joined to the expanding portion of the second column via a second joining member made of metal, each of the first and second joining members abuts directly or indirectly against the expanding portion of each of the first and second columns on both sides in the first direction, and is fixed to the expanding portion of each of the first and second columns so as to be pressed in a direction approaching each other with respect to the expanding portion of each of the first and second columns in the second direction, a vibration damping structure.

2. each of the first and second joining members is fixed to the expanding portion of each of the first and second columns by fixing bolts extending in the second direction, a gap adjusting member is provided between the peripheral wall of the insertion hole of the expanding portion of each of the first and second columns into which the fixing bolts are inserted and the fixing bolts, The vibration damping structure according to Claim 1.

3. each of the first and second joining members, has a main body portion fixed to the side surface of the expanding portion of each of the first and second columns, a fixing portion extending from the main body portion toward the vibration damping device and fixed to the vibration damping device, and a pressing portion extending from the main body portion toward the expanding portion of each of the first and second columns and embedded in the expanding portion of each of the first and second columns, and includes, the main body portion of each of the first and second joining members is pressed in a direction approaching each other with respect to the expanding portion of each of the first and second columns in the second direction and is fixed to the side surface of the expanding portion of each of the first and second columns, The pressing portions of the first and second joining members are embedded in the widened portions of the first and second columns respectively, such that the pressing portions directly or indirectly contact the widened portions of the first and second columns on both sides in the first direction. The vibration damping structure according to claim 1.

4. The column main body portions of the first and second columns are pressed in a direction approaching each other with respect to the upper and lower horizontal members in the first direction, and fixed to the upper and lower horizontal members respectively, fitted to the upper and lower horizontal members respectively, such that the column main body portions contact the upper and lower horizontal members on both sides in the second direction. The vibration damping structure according to any one of claims 1 to 3.

5. The vibration damping device includes a first fixing plate directly or indirectly fixed to the widened portion of the first column, a second fixing plate directly or indirectly fixed to the widened portion of the second column, and a damper plate extending between the first fixing plate and the second fixing plate and formed of a low yield point steel material. The damper plate is formed to be thinner toward the center portion of the damper plate in a plane including the first and second directions. The vibration damping structure according to any one of claims 1 to 4.

6. The vibration damping structure includes an out-of-plane restraint member that suppresses deformation of the vibration damping device toward the outside in a direction substantially perpendicular to the plane including the first and second directions. The out-of-plane restraint member is connected to the widened portions of the first and second columns respectively, such that the out-of-plane restraint member contacts the widened portions of the first and second columns in a direction substantially perpendicular to the plane including the first and second directions. The out-of-plane restraint member is rotatably connected to the widened portions of the first and second columns respectively about an axis extending in a direction substantially perpendicular to the plane including the first and second directions. The vibration damping structure according to any one of claims 1 to 5.

7. In a structure including a first wooden column and a second wooden column each extending in a first direction, and an upper wooden horizontal member and a lower wooden horizontal member extending in a second direction substantially perpendicular to the first direction and fixed to the first and second columns, a vibration damping structure in which a vibration damping device is disposed between the first column and the second column, each of the first and second columns a column main body portion fixed to each of the upper and lower horizontal members; an expanding portion formed integrally with the column main body portion and expanding from the column main body portion toward the other column; and comprising; a space is provided between the expanding portion and each of the upper and lower horizontal members; the vibration damping device is joined to the expanding portion of each of the first and second columns; the vibration damping structure includes a lateral restraint member that suppresses deformation of the vibration damping device toward the outside in a direction substantially perpendicular to the plane including the first and second directions; the lateral restraint member is connected to the expanding portion of each of the first and second columns so as to abut against the expanding portion of each of the first and second columns in a direction substantially perpendicular to the plane including the first and second directions; the lateral restraint member is rotatably connected to the expanding portion of each of the first and second columns about an axis extending in a direction substantially perpendicular to the plane including the first and second directions; a vibration damping structure.

Images