Vibration control devices, vertical and horizontal arrays

Abstract

An object of the present invention is to make it possible to install a vibration control device on a column while minimizing cross-sectional loss of the column. [Solution] A vibration control device (10) for controlling vibrations in a building (1) having a pair of columns (2) erected side by side on the left and right comprises a pair of holders (20) that respectively hold the pair of columns (2), a pair of brackets (40) that extend from each of the pair of holders (20) toward the center between the pair of columns (2), a pendulum (60) that is supported by the pair of brackets (40) and swings up and down around the center between the pair of columns (2) as the pair of columns (2) and the pair of brackets (40) vibrate during an earthquake, and a pair of dampers (80) that are connected to the left and right ends of the pendulum (60) and fixed to the pair of brackets (40), respectively.

Description

[Technical Field]

[0001] The present invention relates to a vibration damping device, a vertical array, and a horizontal array. [Background technology]

[0002] Patent Document 1 discloses a vibration control device for earthquake prevention in wooden buildings constructed using traditional construction methods. This vibration control device is installed between columns lined up on the left and right and is also located in the underfloor space. The vibration control device includes a pair of rectangular plates on the left and right, a pair of crescent-shaped connecting plates on the left and right, connecting members extending left and right, a pair of connecting member-side mounting members attached to the left and right ends of the connecting members, and a pair of viscoelastic bodies on the left and right. The rectangular plates are fixed to the sides of the columns with screws. The crescent-shaped connecting plates are welded to the rectangular plates and protrude from the rectangular plates toward the center between the columns. The viscoelastic body is sandwiched between the crescent-shaped connecting plates and the rectangular plates and bonded to them. During an earthquake, the columns sway left and right. The tilt of the columns causes torsion in the viscoelastic body, and the building's vibration energy is converted into thermal energy in the viscoelastic body, which dissipates the energy. In the underfloor space, the left-right displacement of the columns is small and the lateral sway speed of the columns is also low, so the vibration energy of the building is not efficiently absorbed by the viscoelastic material.

[0003] Because the rectangular plate is fixed to the pillar with screws, the pillar can be damaged by the screws, which may result in damage to the pillar when the vibration control device is installed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-64024 Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to make it possible to install a vibration control device on a column while minimizing cross-sectional loss in the column. [Means for solving the problem]

[0006] The following reference numerals in parentheses refer to FIGS. 1 to 12.

[0007] According to claim 1, A vibration control device (10) for controlling vibrations in a building (1) having a pair of columns (2) erected side by side, a pair of holders (20) that respectively hold the pair of columns (2); a pair of brackets (40) extending from each of the pair of holders (20) toward the center between the pair of posts (2); a pendulum (60) supported by the pair of brackets (40) and swinging up and down about the center between the pair of columns (2) as a center in response to vibration of the pair of columns (2) and the pair of brackets (40) during an earthquake; a pair of dampers (80) respectively connected to the left and right ends of the pendulum (60) and fixed to the pair of brackets (40); A vibration damping device (10) is provided, comprising:

[0008] According to claim 1 as described above, since the pair of holders (20) respectively hold the pair of columns (2), the vibration control device (10) can be installed on the columns (2) without dismantling the building (1) and without causing any cross-sectional loss in the columns (2). During an earthquake, the pendulum (60) swings up and down around the center between the pair of pillars (2), so the vertical displacement of the left and right ends of the pendulum (60) is an amplified version of the left and right displacement of the pillars (2) and the bracket (40), and the speed of the vertical vibration of the left and right ends of the pendulum (60) is an amplified version of the speed of the left and right vibration of the pillars (2) and the bracket (40). Therefore, the damper (80) efficiently damps the left and right vibration of the pillars (2).

[0009] According to claim 2, The vibration damping device (10) according to claim 1, Each of the pair of holders (20) has a first divided body (21) having a first groove (22) and a second divided body (24) having a second groove (25), The first groove (22) and the second groove (25) face each other, and the pillar (2) fits into the first groove (22) and the second groove (25), so that the first divided body (21) and the second divided body (24) embrace the pillar (2), and the first divided body (21) and the second divided body (24) are fastened to each other. A vibration damping device (10) is provided, characterized in that:

[0010] According to claim 2 as described above, the first division body (21) and the second division body (24) embrace the column (2), and the first division body (21) and the second division body (24) are fastened to each other, so that the vibration control device (10) can be installed on the column (2) without dismantling the building (1) and without causing any cross-sectional loss in the column (2).

[0011] According to claim 3, The vibration damping device (10) according to claim 2, The surface of the first groove (22) is roughened. A vibration damping device (10) is provided, characterized in that:

[0012] According to claim 3, the surface of the first groove (22) is roughened, resulting in fine irregularities on the surface. The fine irregularities increase the frictional force at the contact surface between the first segment (21) and the column (2), contributing to preventing displacement of the holder (20). Therefore, the vibration energy of the building (1) is efficiently transmitted to the damper (80) and efficiently absorbed by the damper (80).

[0013] According to claim 4, The vibration damping device (10) according to claim 2 or 3, The surface of the second groove (25) is roughened. A vibration damping device (10) is provided, characterized in that:

[0014] According to claim 4, the surface of the second groove (25) is roughened, resulting in fine irregularities. The fine irregularities increase the frictional force at the contact surface between the second divided body (24) and the column (2), contributing to preventing displacement of the holder (20). Therefore, the vibration energy of the building (1) is efficiently transmitted to the damper (80) and efficiently absorbed by the damper (80).

[0015] According to claim 5, A vibration damping device (10) according to any one of claims 1 to 3, The pair of holders (20) respectively hold the pair of columns (2) under the first floor level of the building (1). A vibration damping device (10) is provided, characterized in that:

[0016] According to claim 5 as described above, the weight of the vibration control device (10) is unlikely to be a factor that increases the shaking of the building (1) during an earthquake. Since the horizontal displacement caused by the bending of the pillars (2) during an earthquake becomes smaller from the top to the bottom of the pillars (2), this vibration control device (10) exhibits high damping performance even when installed under the floor. In other words, since the pendulum (60) swings up and down around the center between the pair of pillars (2), the vertical displacement of the left and right ends of the pendulum (60) amplifies the lateral displacement of the pillars (2), and the velocity of the vertical vibration of the left and right ends of the pendulum (60) amplifies the velocity of the lateral vibration of the pillars (2), and such amplification contributes to improving the damping effect of the damper (80).

[0017] According to claim 6, A vibration damping device (10) according to any one of claims 1 to 3, The building (1) is a wooden building constructed using traditional construction methods. A vibration damping device (10) is provided, characterized in that:

[0018] According to claim 6 as described above, vibration control of a wooden building constructed by traditional construction methods can be achieved without dismantling the building.

[0019] According to claim 7, A vibration damping device (10) according to any one of claims 1 to 3, In the plane defined by the central axes of the pair of pillars (2) The device includes a first connecting shaft (51) and a second connecting shaft (52) having central axes parallel to the out-of-plane direction, Each of the pair of brackets (40) It is fixed to the holder (20) and extends from the holder (20) toward the center of the pair of posts (2), The aforementioned A pair of upper arms (41) in the out-of-plane direction; a pair of lower arms (43) fixed to the holder (20), extending from the holder (20) below the pair of upper arms (41) toward the centers of the pair of columns (2) in the out-of-plane direction; before The pair of columns (2) are fixed to the pair of upper arms (41) at the center thereof, before A pair of center plates (45) are fixed to the pair of lower arms (43) at the center of the pair of columns (2), sandwiching the pendulum (60) in the out-of-plane direction, and and the pendulum (60) is connected to the center plate (45) of one of the pair of brackets (40) by the first connecting shaft (51) so as to be rotatable around the first connecting shaft (51) relative to the center plate (45) of one of the pair of brackets (40); The pendulum (60) is connected to the other center plate (45) of the pair of brackets (40) by the second connecting shaft (52) so as to be rotatable around the second connecting shaft (52) relative to the other center plate (45) of the pair of brackets (40). A vibration damping device (10) is provided, characterized in that:

[0020] According to claim 7 as described above, the vibration damping device 10 can be easily assembled. Since the vibration damping device 10 is an assembled product, the disassembled vibration damping device 10 can be easily transported to the site of the building 1.

[0021] According to claim 8, The vibration damping device (10) according to claim 7, The center plate (45) contacts the pendulum (60). A vibration damping device characterized by the above features is provided.

[0022] According to claim 8 as described above, when the pendulum (60) swings during an earthquake, the kinetic energy of the pendulum (60) is converted into thermal energy due to friction, and the vibration of the pillar (2) is damped by the friction.

[0023] According to claim 9, The vibration damping device (10) according to claim 7, The second connecting shaft (52) is provided so as to be movable in the left-right direction relative to the other center plate (45) of the pair of brackets (40) or the pendulum (60). A vibration damping device (10) is provided, characterized in that:

[0024] When the pair of pillars (2) vibrate and tilt in the same direction during an earthquake, the pair of brackets (40) swing in opposite directions, changing the distance between the first connecting shaft (51) and the second connecting shaft (52). According to claim 9, the second connecting shaft (52) is provided so as to be movable left and right relative to the other center plate (45) of the pair of brackets (40) or the pendulum (60). Therefore, even if the distance between the first connecting shaft (51) and the second connecting shaft (52) changes, the pendulum (60) is not constrained by this change and swings smoothly. Therefore, the vibration damping effect of the vibration damping device (10) is reliably achieved.

[0025] According to claim 10, A vertical array having a plurality of vibration damping devices (10) according to any one of claims 1 to 3, The plurality of vibration damping devices (10) are arranged in a vertical direction, The pair of holders (20) of each of the plurality of vibration damping devices (10) respectively embrace the common pair of columns (2). A vertical array is provided, characterized in that:

[0026] According to claim 11, A horizontal array having a plurality of vibration damping devices (10) according to any one of claims 1 to 3, The plurality of vibration damping devices (10) are arranged in a horizontal direction, Adjacent vibration damping devices (10) of the plurality of vibration damping devices (10) share the holder (20) between the adjacent vibration damping devices among the pair of holders (20). A horizontal array is provided, characterized in that: [Effects of the Invention]

[0027] According to the present invention, the vibration control device can be installed on the pillar while minimizing cross-sectional loss of the pillar. Furthermore, the damper efficiently attenuates the lateral vibration of the pillar. [Brief explanation of the drawings]

[0028] [Figure 1] Figure 1 is a cross-section of a building. [Figure 2] FIG. 2 is a front view of the vibration damping device. [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III shown in FIG. [Figure 4] 4 is a cross-sectional view taken along line IV-IV shown in FIG. [Figure 5] FIG. 5 is a perspective view of the holder parts. [Figure 6] FIG. 6 is a perspective view of the parts of the holder. [Figure 7] FIG. 7 is a perspective view of the holder parts. [Figure 8] FIG. 8 is a perspective view of the holder parts. [Figure 9] FIG. 9 is an enlarged view of region IX shown in FIG. [Figure 10] FIG. 10 is a perspective view of the damper. [Figure 11] FIG. 11 is a front view of a vertical array in which vibration damping devices are arranged in the vertical direction. [Figure 12] FIG. 12 is a front view of a horizontal array in which vibration damping devices are arranged in the horizontal direction. DETAILED DESCRIPTION OF THE INVENTION

[0029] Hereinafter, embodiments will be described with reference to the drawings. Features and technical effects of the embodiments will be understood from the following detailed description and drawings. However, the scope of the present invention is not limited to the embodiments disclosed below. Because the drawings are provided for illustrative purposes only, the scope of the present invention is not limited to the examples in the drawings.

[0030] <1. Building> Fig. 1 is a cross-sectional view of a building 1. In Fig. 1, a vibration damping device 10 is illustrated schematically.

[0031] Building 1 is a temple or shrine structure that has been standing for many years. Building 1 is a wooden and stone building constructed using traditional construction methods. Building 1 has multiple pillars 2 and multiple cross members that are framed using timber-frame construction. Cross members include girders, main beams, sub-beams, rainbow beams, sashi-kamoi (sashi-kamoi), head beams, nuki (nageshi) beams, nagashi (nageshi), and ashigatari (foot support). At the joints between pillars 2 and cross members, pillars 2 and cross members are joined with mortise and tenon joints or joint joints, so building 1 can be said to have a flexible structure. Pillar 2 is erected on foundation stone 3. Pillar 2 may be insulated from foundation stone 3 in terms of dynamic load without being tightly fastened to foundation stone 3. The lower end of pillar 2 may be connected to foundation stone 3 with a dowel. That is, a dowel may be installed at the upper end of foundation stone 3, a dowel hole may be formed at the lower end of pillar 2, and the dowel may fit or fit loosely into the dowel hole.

[0032] Since the building 1 is a temple or shrine structure that was erected many years ago, the building 1 has deteriorated over time and has become vulnerable to earthquakes. Therefore, the building 1 is reinforced by vibration control using multiple vibration control devices 10 to protect against earthquakes.

[0033] <2. Vibration control device> 2 is a front view of the vibration damping device 10 installed in the underfloor space between adjacent pillars 2. FIG. 3 is a horizontal cross-sectional view taken along line III-III in FIG. 2. FIG. 4 is a horizontal cross-sectional view taken along line IV-IV in FIG. 2. 2 to 4, the vibration damping device 10 is installed between the columns 2 below the floor 4 at the first floor level of the building 1. The horizontal displacement caused by the bending of the columns 2 during an earthquake decreases from the top to the bottom of the columns 2, so the maximum inclination of the columns 2 relative to the vertical axis is small at the portion where the vibration damping device 10 is connected to the columns 2. Even in such a situation, the vibration damping device 10 amplifies the displacement using the principle of leverage, so the vibration damping device 10 efficiently absorbs the energy of the shaking of the building 1.

[0034] The vibration damping device 10 will be described in detail below. In the following description, the in-plane direction refers to the direction parallel to the plane defined by the central axes of the two pillars 2 to which the vibration damping device 10 is attached. The out-of-plane direction refers to the direction perpendicular to the plane defined by the central axes of the two pillars 2. The axial direction refers to the direction parallel to the central axis of the pillar 2. The radial direction refers to the direction perpendicular to the central axis of the pillar 2. The left-right direction refers to the direction from one pillar 2 toward the adjacent pillar 2 and the opposite direction.

[0035] The vibration damping device 10 includes a pair of left and right holders 20, a pair of left and right brackets 40, a pendulum 60, and a pair of left and right dampers 80.

[0036] The pair of holders 20 respectively hold the left and right columns 2 under the floor 4. The holders 20 are made of metal such as stainless steel or aluminum alloy.

[0037] 5 to 8 are perspective views of the components of each holder 20. As shown in Fig. 5 to 8, each holder 20 has a first divided body 21, a pair of upper and lower ribs 23, a second divided body 24, a flange 26, a pair of upper and lower ribs 27, a pair of upper plates 28 extending out of the plane, and a pair of lower plates 29 extending out of the plane.

[0038] The first and second segments 21 and 24 are grooved. This groove is also called a U-shape. As shown in FIGS. 3 to 8, the groove 22 of the first segment 21 and the groove 25 of the second segment 24 face each other, and the column 2 fits into the grooves 22 and 25 of the first and second segments 21 and 24, thereby supporting the column 2. The first segment 21 is fastened to the second segment 24 with multiple bolt and nut fasteners 90, which generates a force that supports the column 2 between the first and second segments 21 and 24. The surfaces of the grooves 22 and 25 of the segments 21 and 24 are roughened, resulting in fine irregularities. The fine irregularities increase the frictional force at the contact surfaces between the segments 21 and 24 and the column 2, helping to prevent misalignment of the holder 20. The roughening process can be, for example, sandblasting or etching. An adhesive may be filled into the gap between the pillar 2 and the segments 21, 22, and the segments 21, 22 may be adhered to the pillar 2 by the adhesive. The segments 21, 22 may be fastened to the pillar 2 with screws. Adhesion or screw fastening may be used in combination with fastening using bolt and nut fasteners 90.

[0039] The first divided body 21 and the ribs 23 are integrally molded. The ribs 23 protrude radially from the outer surface of the first divided body 21. The ribs 23 have a thickness in the axial direction and are provided parallel to the radial direction. The first divided body 21 is reinforced by the ribs 23.

[0040] The second division body 24, flange 26, rib 27, upper plate 28, and lower plate 29 are integrally molded. The flange 26 is a U-shaped plate having a thickness in the out-of-plane direction. The flange 26 protrudes from the side of the second division body 24 toward the center between the columns 2 and is arranged parallel to the in-plane direction. The flange 26 has multiple bolt holes arranged in series along the upper edge of the flange 26 and multiple bolt holes arranged in series along the lower edge of the flange 26. The rib 27 protrudes from the outer surface of the second division body 24 and from the flange 26. The rib 27 has a thickness in the axial direction and is arranged parallel to the radial direction. The second division body 24 and flange 26 are reinforced by the rib 27. The two upper plates 28 are arranged spaced apart in the out-of-plane direction inside the U-shape of the flange 26 and hang down from the underside of the upper rib 27. The two lower plates 29 are arranged on the inside of the U-shape of the flange 26 and spaced apart from each other in the out-of-plane direction, and rise up from the upper surface of the lower rib 27 .

[0041] As shown in Figures 2 to 4, the pair of left and right brackets 40 are rigidly joined to the flanges 26 of the pair of holders 20 by a plurality of bolt and nut fasteners. The pair of brackets 40 each extend from the flange 26 of the holder 20 towards the center between the pillars 2 and face each other. The pair of brackets 40 are spaced apart from each other in the left-right direction.

[0042] Fig. 9 is an enlarged view of area IX shown in Fig. 3. As shown in Figs. 2 to 4 and 9, each bracket 40 has two upper arms 41, two upper spacers 42, two lower arms 43, two lower spacers 44, two center plates 45, and a pair of upper and lower center spacers 46.

[0043] The two upper arms 41 are made of metal, such as stainless steel or aluminum alloy. The two upper arms 41 sandwich the flange 26 of the holder 20 between them and are fastened to the flange 26 with a plurality of bolt and nut fasteners 91. The upper arms 41 are arranged along the upper edge of the flange 26 and extend from the flange 26 toward the center between the pillars 2. The upper spacer 42 is sandwiched between the centers of the extended portions, and the upper spacer 42 and the center of the extended portions are fastened together with the plurality of bolt and nut fasteners 92.

[0044] In the extending portion of the upper arm 41 near the tip, the upper arm 41, center plate 45, center spacer 46, center plate 45, and upper arm 41 are stacked in the out-of-plane direction in this order. This stack is fastened together with a plurality of bolt and nut fasteners 93.

[0045] The two lower arms 43 are made of metal, such as stainless steel or aluminum alloy. The two lower arms 43 sandwich the flange 26 of the holder 20 between them and are fastened to the flange 26 with a plurality of bolt and nut fasteners 94. The lower arms 43 are arranged along the lower edge of the flange 26 and extend from the flange 26 toward the center between the pillars 2. A lower spacer 44 is sandwiched between the extending portions, and the extending portions and the lower spacer 44 are fastened together with bolt and nut fasteners 95.

[0046] In the extending portion of the lower arm 43 near the tip, the lower arm 43, center plate 45, center spacer 46, center plate 45, and lower arm 43 are stacked in the out-of-plane direction in this order. This stack is fastened together with a plurality of bolt and nut fasteners 96.

[0047] The dimensions of the upper arm 41 and the lower arm 43 in the left-right direction are set to match the distance between the pillars 2. In other words, as the distance between the pillars 2 increases, the dimensions of the upper arm 41 and the lower arm 43 in the left-right direction increase.

[0048] The two center plates 45 are made of metal such as stainless steel or aluminum alloy, and are provided vertically from the upper arm 41 to the lower arm 43.

[0049] The pendulum 60 is elongated in the left-right direction. In other words, the dimension of the pendulum 60 in the left-right direction is longer than the dimension of the pendulum 60 in the up-down direction. The pendulum 60 is supported by the right end of the left bracket 40 and the left end of the right bracket 40 in the center between the pillars 2. When an earthquake causes the pillar 2 to vibrate and tilt left and right, causing the left and right brackets 40 to swing in opposite directions, the pendulum 60 swings up and down around the center between the pillars 2. Specifically, when the pillar 2 tilts to the right during an earthquake, the right bracket 40 swings up and the left bracket 40 swings down, causing these brackets 40 to swing the pendulum 60 up and to the right. When the pillar 2 tilts to the left during an earthquake, the right bracket 40 swings down and the left bracket 40 swings up, causing these brackets 40 to swing the pendulum 60 up and to the left.

[0050] The pendulum 60 is made of metal, such as stainless steel or aluminum alloy. The pendulum 60 is connected to the left bracket 40 at the center between the columns 2. Specifically, the pendulum 60 is sandwiched between the two center plates 45 of the left bracket 40 and connected to the center plates 45 by a first connecting shaft 51, also called a connecting pin. The central axis of the first connecting shaft 51 is parallel to the out-of-plane direction. One or both of the pendulum 60 and the left bracket 40 are rotatable about the central axis of the first connecting shaft 51 relative to the first connecting shaft 51. By connecting the pendulum 60 to the left bracket 40, the pendulum 60 is oscillat- erable about the central axis of the first connecting shaft 51 relative to the left bracket 40. Note that the first connecting shaft 51 may penetrate the pendulum 60 and the center plate 45 of the left bracket 40 in the out-of-plane direction to prevent the pendulum 60 and the first connecting shaft 51 from coming off the center plate 45. The first connecting shaft 51 may be integrally formed with or fixed to either the pendulum 60 or the center plate 45 of the left bracket 40, and the first connecting shaft 51 may pass through the other in the out-of-plane direction.

[0051] The pendulum 60 is connected to the right bracket 40 at the connection between the pendulum 60 and the left bracket 40, i.e., to the right of the first connecting shaft 51. Specifically, the pendulum 60 is sandwiched between the two center plates 45 of the right bracket 40 and connected to those center plates 45 by a second connecting shaft 52, also called a connecting pin. The central axis of the second connecting shaft 52 is parallel to the out-of-plane direction. Either the pendulum 60 or the right bracket 40 is fixed to or integrally formed with the second connecting shaft 52, or is rotatable about the central axis of the second connecting shaft 52 relative to the second connecting shaft 52. The other is rotatable about the central axis of the second connecting shaft 52 relative to the second connecting shaft 52, and is movable in the in-plane direction, particularly the left-right direction, relative to the second connecting shaft 52. By connecting the pendulum 60 to the right bracket 40, the pendulum 60 is provided to be swingable about the central axis of the second connecting shaft 52 relative to the right bracket 40, and the second connecting shaft 52 is provided to be movable in-plane, particularly left-right, relative to the pendulum 60 or the right bracket 40. Note that the second connecting shaft 52 may penetrate the pendulum 60 and the center plate 45 of the right bracket 40 in an out-of-plane direction, so that a through hole 64 formed in the pendulum 60 through which the second connecting shaft 52 passes is formed long in the left-right direction, thereby preventing the second connecting shaft 52 from coming off the pendulum 60 and the center plate 45. The second connecting shaft 52 may penetrate the pendulum 60 and the center plate 45 of the right bracket 40 in an out-of-plane direction, so that a through hole formed in the center plate through which the second connecting shaft 52 passes is formed long in the left-right direction, thereby preventing the second connecting shaft 52 from coming off the pendulum 60 and the center plate 45. The second connecting shaft 52 may be integrally formed with or fixed to the center plate 45 of the left bracket 40, and the second connecting shaft 52 may pass through the pendulum 60 in the out-of-plane direction, so that the through hole 64 formed in the pendulum 60 through which the second connecting shaft 52 passes may be formed long on the left and right.The second connecting shaft 52 may be integrally formed with or fixed to the pendulum 60, and the second connecting shaft 52 may pass through the center plate 45 of the left bracket 40 in the out-of-plane direction, so that the through hole formed in the center plate through which the second connecting shaft 52 passes may be formed long in the left and right directions.

[0052] The left damper 80 is provided between the left holder 20 and the left end of the pendulum 60. In other words, the left damper 80 is connected to the left end of the pendulum 60 and fixed to the left holder 20. The right damper 80 is provided between the right holder 20 and the right end of the pendulum 60. In other words, the right damper 80 is connected to the right end of the pendulum 60 and fixed to the right holder 20.

[0053] Figure 10 is a perspective view of a damper 80. As shown in Figure 10, the damper 80 has two fixed plates 81, two high-damping rubber members 82, and one movable plate 83. The fixed plates 81 and the movable plates 83 are made of metal, such as stainless steel or aluminum alloy. The fixed plate 81, high-damping rubber member 82, movable plate 83, high-damping rubber member 82, and fixed plate 81 are stacked in this order.

[0054] As shown in Figure 2, the upper part of fixed plate 81 overlaps upper plate 28 of holder 20 (see Figure 7), and is fastened to upper plate 28 with bolt and nut fasteners. The lower part of fixed plate 81 overlaps lower plate 29 of holder 20 (see Figure 7), and is fastened to lower plate 29 with bolt and nut fasteners. High-damping rubber 82 is disposed between upper rib 27 and lower rib 27 on the inside of the U-shape of flange 26. Movable plate 83 protrudes from the edge of fixed plate 81 toward the center between pillars 2, and movable plate 83 is connected to the end of pendulum 60. Here, the pendulum 60 has a main body plate 61 that is long in the left-right direction, two connecting plates 62 that sandwich the left end of the main body plate 61 in the out-of-plane direction and are fixed to the main body plate 61 with bolt and nut fasteners, and two connecting plates 62 that sandwich the right end of the main body plate 61 in the out-of-plane direction and are fixed to the main body plate 61 with bolt and nut fasteners. The movable plate 83 of the left damper 80 is sandwiched between the left connecting plates 62 and fixed to the left connecting plate 62 with bolt and nut fasteners. The movable plate 83 of the right damper 80 is sandwiched between the right connecting plates 62 and fixed to the right connecting plate 62 with bolt and nut fasteners.

[0055] The size, thickness and composition of the two high-damping rubber members 82 are set in accordance with the vibration characteristics of the building 1 during an earthquake.

[0056] The dimension of the connecting plate 62 in the left-right direction is set to match the distance between the pillars 2. In other words, as the distance between the pillars 2 increases, the dimension of the connecting plate 62 in the left-right direction increases.

[0057] The damper 80 is a rubber damper. Alternatively, for example, the high-damping rubber 82 may be replaced with another type of vibration damping material (filled gas, filled oil, steel material in a loop or U-shape, friction material, or viscoelastic material), thereby making the damper 80 a gas damper, oil damper, steel damper, friction damper, or viscoelastic damper.

[0058] When an earthquake causes the pillar 2 to vibrate and tilt left and right, causing the left and right brackets 40 to swing up and down in opposite directions, the pendulum 60 swings up and down around the midpoint between the pillars 2. The vertical displacements of the left and right ends of the pendulum 60 are an amplified version of the left and right displacements of the pillar 2 and the brackets 40. Therefore, even if the left and right swing of the pillar 2 is small, the high-damping rubber 82 of the damper 80 deforms significantly, so the high-damping rubber 82 efficiently absorbs vibration energy and efficiently damps the left and right vibration of the pillar 2. Furthermore, the speed of the up and down vibrations of the left and right ends of the pendulum 60 is an amplified version of the speed of the left and right vibrations of the pillar 2 and the brackets 40. Therefore, even if the speed of the left and right vibrations of the pillar 2 is low, the deformation speed of the high-damping rubber 82 of the damper 80 is high, so the high-damping rubber 82 is likely to exhibit viscous damping, and the high-damping rubber 82 efficiently damps the left and right vibrations of the pillar 2.

[0059] The degree to which the vertical displacement of the left and right ends of the pendulum 60 is amplified from the left and right displacement of the pillar 2 (hereinafter referred to as the amplification factor) is determined by the distance to the second connecting shaft 52. As the distance from the first connecting shaft 51 to the second connecting shaft 52 becomes shorter, the amplification factor becomes higher.

[0060] The limit of vertical displacement of the left and right ends of the pendulum 60 is determined by the limit of deformation of the high-damping rubber 82. When the deformation of the high-damping rubber 82 reaches its limit, the displacement of the left and right ends of the pendulum 60 also reaches its limit displacement, and the left and right ends of the pendulum 60 will not be displaced any further.

[0061] Because the pendulum 60 is in surface contact with the center plates 45 of the left and right brackets 40, when the pendulum 60 swings during an earthquake, the kinetic energy of the pendulum 60 is converted into thermal energy due to friction, and the left and right vibration of the pillar 2 is therefore damped by friction.

[0062] The bracket 40 is an assembly of an upper arm 41, an upper spacer 42, a lower arm 43, a lower spacer 44, a center plate 45, and a center spacer 46, and this assembly is attached to the second divided body 24, thereby connecting the assembly to the damper 80 via the second divided body 24. This assembly functions as a safety mechanism. For example, if the stiffness or yield strength of the high-damping rubber 82 becomes extremely large due to the temperature dependency of the high-damping rubber 82, or if the stiffness or yield strength of the high-damping rubber 82 suddenly increases due to the damper 80 being locked by the deformation limit of the vibration damping device 10, the safety mechanism of the assembly allows the vibration damping device 10 to be controlled against the design load.

[0063] <3. Modifications> Modifications will be described below. Two or more of the modifications described below may be applied in combination.

[0064] (1) In the above description, the cross-sectional shape of the pillar 2 is rectangular, and the cross-sectional shape of the hollow of the holder 20 is also rectangular. However, the cross-sectional shape of the pillar 2 and the cross-sectional shape of the hollow of the holder 20 may be a shape other than rectangular, for example, a circle.

[0065] (2) In the above description, the vibration damping device 10 is provided between the pillars 2 under the floor 4. However, the vibration damping device 10 may be provided above the floor 4, for example, between the pillars 2 immediately under or above the ceiling.

[0066] (3) The components of the holder 20 shown in Figures 5 and 6 may be divided symmetrically about a central plane parallel to the in-plane direction of the holder 20, and the divided pieces may be fastened together with bolt and nut fasteners to assemble the components shown in Figures 5 and 6. The same applies to the components of the holder 20 shown in Figures 7 and 8.

[0067] (4) The upper arm 41, the lower arm 43, and the center plate 45 of the bracket 40 may be integrally formed.

[0068] (5) In the above description, one vibration damping device 10 is installed between a pair of columns 2. However, as shown in FIG. 11, two vibration damping devices 10 may be installed between a pair of columns 2, and the two vibration damping devices 10 may be lined up vertically. Three or more vibration damping devices 10 may be installed between a pair of columns 2, and the two vibration damping devices 10 may be lined up vertically. A plurality of vibration damping devices 10 lined up vertically as described above is called a vertical array of vibration damping devices.

[0069] (6) As shown in FIG. 12, two vibration damping devices 10 may be arranged side by side. In this case, the holder 20 between both vibration damping devices 10 is shared by both vibration damping devices 10. That is, the left holder 20 of the right vibration damping device 10 in FIG. 12 is shared with the right holder 20 of the left vibration damping device 10 in FIG. 2, and this shared holder 20 embraces the central column 2 of three columns 2 arranged side by side. This shared holder 20 is formed by joining two second divided bodies 24, as shown in FIG. 7, with the grooves 25 facing each other, and the columns 2 fit into these grooves 25. Of course, three or more vibration damping devices 10 may be arranged side by side. Even when three or more vibration damping devices 10 are arranged side by side, adjacent vibration damping devices 10 share the holder 20 between them. Such a horizontal arrangement of two or more vibration damping devices 10 is called a horizontal array of vibration damping devices.

[0070] <4. Summary> (1) Since the pair of holders 20 of the vibration control device 10 respectively hold the pair of columns 2, the vibration control device 10 can be installed on the columns 2 without dismantling the building 1 and without causing any cross-sectional loss in the columns 2.

[0071] (2) During an earthquake, the pendulum 60 swings up and down around the center between the pair of pillars 2, and therefore the vertical displacement of the left and right ends of the pendulum 60 is an amplified version of the horizontal displacement of the pillars 2 and the vertical displacement of the bracket 40, and the speed of the vertical vibration of the left and right ends of the pendulum 60 is an amplified version of the horizontal vibration speed of the pillars 2 and the vertical vibration speed of the bracket 40. Therefore, the damper 80 efficiently absorbs the vibration energy of the building 1 and efficiently damps the horizontal vibration of the pillars 2.

[0072] (3) Each of the pair of holders 20 has a first segment 21 having a first groove 22 and a second segment 24 having a second groove 25. The first groove 22 and the second groove 25 face each other, and the column 2 fits into the first groove 22 and the second groove 25, so that the first segment 21 and the second segment 24 embrace the column 2. The first segment 21 and the second segment 24 are fastened to each other with a plurality of bolt and nut fasteners 90. Attaching the holder 20 in this manner contributes to installing the vibration control device 10 on the column 2 without dismantling the building 1 and without causing cross-sectional loss in the column 2. Attaching the holder 20 in this manner contributes to installing the vibration control device 10 on the column 2 even if the building 1 deforms due to aging or other reasons, causing the column 2 to tilt.

[0073] (4) The surfaces of the grooves 22, 25 of the segments 21, 24 are roughened. The unevenness of these surfaces increases the frictional force at the contact surfaces between the segments 21, 24 and the column 2, helping to prevent displacement of the holder 20. Therefore, the vibration energy of the building 1 is efficiently transmitted to the damper 80 and absorbed by the damper 80.

[0074] (5) Because the vibration damping device 10 is an assembled product, the disassembled vibration damping device 10 can be easily transported to the site of the building 1. In addition, the vibration damping device 10 can be easily installed under the floor 4 of the building 1.

[0075] (6) When the pair of pillars 2 vibrate and tilt in the same direction during an earthquake, the pair of brackets 40 swing in opposite directions, changing the distance between the first connecting shaft 51 and the second connecting shaft 52. Because the second connecting shaft 52 is movable left and right relative to the center plate 45 of the right bracket 40 or the pendulum 60, even if the distance between the first connecting shaft 51 and the second connecting shaft 52 changes, the pendulum 60 does not become restricted by this and swings smoothly. Therefore, the vibration damping effect of the vibration damping device 10 is reliably achieved.

[0076] (7) Since the vibration control device 10 is installed under the floor of the building 1, the weight of the vibration control device 10 does not easily contribute to the vibration of the building 1 during an earthquake.

[0077] (8) The horizontal displacement caused by the bending of the column 2 during an earthquake becomes smaller from the top to the bottom of the column 2, and therefore the vibration control device 10 exhibits high damping performance even when installed in the underfloor space. This is because the displacement and velocity amplification effect of the pendulum 60 is effective in damping the vibration of the column 2.

[0078] (9) During an earthquake, the vibration of the column 2 is damped by the friction of the pendulum 60 against the center plate 45.

[0079] (10) Building 1 is earthquake-proofed by vibration control device 10. Building 1 is a valuable cultural asset that was born and nurtured throughout Japan's long history and has been protected and passed down to the present day. Via the protection of such cultural assets, vibration control device 10 contributes to the achievement of the Sustainable Development Goals (SDGs). [Explanation of symbols]

[0080] 1. Building 2 pillars 3. Cornerstone 10 Vibration control device 20 Holder 21 1st division body 22 First groove 24 Second division body 25 Second groove 40 Bracket 41 Upper arm 43 Lower arm 45 Center Plate 51 First connecting shaft 52 Second connecting shaft 60 Pendulum 80 Damper

Claims

1. A vibration control device for controlling vibrations in a building having a pair of columns erected side by side, a pair of holders each holding the pair of columns; a pair of brackets extending from each of the pair of holders toward the center between the pair of posts; a pendulum supported by the pair of brackets and swinging up and down about the center between the pair of pillars as a center in response to vibration of the pair of pillars and the pair of brackets during an earthquake; a pair of dampers respectively connected to the left and right ends of the pendulum and fixed to the pair of brackets; A vibration damping device comprising:

2. The vibration damping device according to claim 1, each of the pair of holders has a first divided body having a first groove and a second divided body having a second groove; The first groove and the second groove face each other, and the pillar is fitted into the first groove and the second groove, so that the first divided body and the second divided body embrace the pillar, and the first divided body and the second divided body are fastened to each other. A vibration damping device characterized by:

3. The vibration damping device according to claim 2, The surface of the first groove is roughened. A vibration damping device characterized by:

4. The vibration damping device according to claim 2 or 3, The surface of the second groove is roughened. A vibration damping device characterized by:

5. The vibration damping device according to any one of claims 1 to 3, The pair of holders respectively hold the pair of columns below the first floor level of the building. A vibration damping device characterized by:

6. The vibration damping device according to any one of claims 1 to 3, The building is a wooden structure constructed using traditional construction methods. A vibration damping device characterized by:

7. The vibration damping device according to any one of claims 1 to 3, a first connecting shaft and a second connecting shaft having central axes parallel to an out-of-plane direction in a plane defined by the central axes of the pair of pillars; Each of the pair of brackets a pair of upper arms fixed to the holder, extending from the holder toward the center of the pair of columns in the out-of-plane direction; a pair of lower arms fixed to the holder, extending from the holder below the pair of upper arms toward the centers of the pair of columns in the out-of-plane direction; a pair of center plates fixed to the pair of upper arms at centers of the pair of pillars and fixed to the pair of lower arms at centers of the pair of pillars, sandwiching the pendulum in the out-of-plane direction; and The pendulum is rotatable about the first connecting shaft relative to the center plate of one of the pair of brackets by the first connecting shaft. One of the brackets is connected to the center plate, The pendulum is connected to the center plate of the other of the pair of brackets by the second connecting shaft so as to be rotatable about the second connecting shaft relative to the center plate of the other of the pair of brackets. A vibration damping device characterized by:

8. The vibration damping device according to claim 7, The center plate contacts the pendulum A vibration damping device characterized by:

9. The vibration damping device according to claim 7, The second connecting shaft is provided so as to be movable in the left-right direction relative to the center plate or the pendulum of the other of the pair of brackets. A vibration damping device characterized by:

10. A vertical array including a plurality of vibration damping devices according to any one of claims 1 to 3, The plurality of vibration damping devices are arranged in a vertical direction, The pair of holders of each of the plurality of vibration damping devices respectively embrace the common pair of columns. A vertical array characterized by:

11. A horizontal array including a plurality of vibration damping devices according to any one of claims 1 to 3, The plurality of vibration damping devices are arranged in a horizontal direction, Adjacent vibration damping devices of the plurality of vibration damping devices share a holder between the adjacent vibration damping devices among the pair of holders. A horizontal array characterized by:

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