Vibration damping device

Abstract

To effectively utilize a space in a plane of structure where a vibration control device 10 is installed, by effectively exhibiting a vibration control function, even when an upper beam is horizontally displaced in the Lh direction to a stud, in a state of maintaining an initial attitude by the upper beam 221 and the stud 21.SOLUTION: The vibration damping device 10 includes a vertical member side leaf spring 30 having a vertical member mounting portion 31 at a base end portion and a laminated portion 37 curved in a longitudinal direction so as to protrude toward one surface side at a portion close to a tip end, a horizontal member side leaf spring 50 having a horizontal member mounting portion 51 at a base end portion and a laminated portion 57 curved in a longitudinal direction so as to protrude toward one surface side and overlapping with the laminated portion 37 at a portion close to a tip end, a friction plate 70 sandwiched and held by both laminated portions, and a restraining means 80 that allows relative movement of both laminated portions in each longitudinal direction and elastically biases each laminated portion to the friction plate 70. The tip end portions 30a and 50a of both the plate springs are configured to be able to advance and retreat in the longitudinal direction with respect to the attachment portions 5131 and.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a vibration damping device that suppresses vibration of a structure. [Background technology]

[0002] 2. Description of the Related Art A vibration damping device in which a plurality of arc-shaped curved leaf springs are stacked is known as a device for suppressing vibration of a structure. Patent Document 1 describes a vibration control device that is suitable for attachment to the joints of buildings, and includes a curved base leaf spring whose both ends are fixed to a pillar and a beam, respectively, and a sliding leaf spring whose one end is fixedly disposed relative to one end of the base leaf spring and whose inner surface, excluding the one end, is laminated so that at least a part of the inner surface can slide against one surface of the base leaf spring. This vibration control device absorbs vibration energy by utilizing the frictional force generated by the misalignment of the leaf springs when the curvature of the leaf springs changes due to deformation of the joint. In order for this vibration control device to absorb vibration energy, it is necessary for the angle between the column and the beam to change. Even if this vibration control device were installed at the joint of a steel-framed structure where the column and beam are rigidly connected, it would not function because the angle of the joint would not change.

[0003] A stud-type friction damper device is described in Patent Document 2. This friction damper device is suitable for use in buildings in which relative displacement occurs between upper and lower beams in the horizontal direction. The friction damper device comprises a friction sliding plate and two metal plates sandwiching the friction sliding plate. The friction sliding plate is fixed to the upper beam via a base plate. The metal plate is fixed to the lower beam via a rigid frame and the base plate. A friction material is detachably attached to the metal plate. When the upper beam and lower beam are displaced relative to each other in the horizontal direction, a dynamic friction force is generated between the friction sliding plate and the friction material, absorbing vibration energy. In the friction damper device, the friction sliding plate is arranged parallel to the vertical structural plane formed by two columns and two beams. Therefore, depending on the size of the friction sliding plate, it may be difficult to effectively utilize the space within the vertical structural plane. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2009-174198 A [Patent Document 2] Japanese Patent Application Publication No. 8-193635 Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a vibration control device that effectively exerts its vibration control function even when the first member and second member to which the device is attached are displaced in position without any angular displacement relative to each other, and that allows for effective utilization of space even after the device is installed. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the present invention provides a first-member side leaf spring having, at a longitudinal position thereof, a first-member supported portion supported by a first member whose longitudinal direction extends in a first direction, and a laminated portion that is curved in the longitudinal direction so as to be convex on one side at a position closer to the longitudinal tip than the first-member supported portion and that overlaps with another member in the thickness direction; and a second-member side leaf spring having, at a longitudinal position thereof, a second-member supported portion supported by a second member whose longitudinal direction extends in a second direction intersecting the first direction, and a laminated portion that is curved in the longitudinal direction so as to be convex on one side at a position closer to the longitudinal tip than the second-member supported portion and that overlaps with another member in the thickness direction. a second-member side leaf spring having a laminated portion overlapping the second-member side leaf spring in the thickness direction, the laminated portion being overlapped in the thickness direction with the laminated portion of the first-member side leaf spring; and restraining means that allows relative movement of the laminated portion of the first-member side leaf spring and the laminated portion of the second-member side leaf spring in the longitudinal direction and presses the laminated portion of the first-member side leaf spring toward the laminated portion of the second-member side leaf spring, wherein the tip of the first-member side leaf spring is configured to be able to advance and retreat in the longitudinal direction relative to the supported portion of the second member, and the tip of the second-member side leaf spring is configured to be able to advance and retreat in the longitudinal direction relative to the supported portion of the first member. [Effects of the Invention]

[0007] According to the present invention, the vibration damping function can be effectively exerted even when the first member and the second member to which the vibration damping device is attached are displaced in a manner that does not involve angular displacement relative to each other, and effective utilization of space can be achieved even after the device is installed. [Brief explanation of the drawings]

[0008] [Figure 1] 1A and 1B are front views schematically showing the vertical structural plane of a building to which a vibration control unit according to one embodiment of the present invention is attached. [Figure 2] 1 is a front view showing a vibration damping device according to a first embodiment of the present invention. [Figure 3] 1 is a perspective view showing a vibration damping device according to a first embodiment of the present invention. [Figure 4] FIG. 2 is an exploded view showing the plate-like members that make up the vibration damping device arranged in a plane. [Figure 5] FIG. 10 is a front view illustrating an example of attaching two vibration control devices to a stud. [Figure 6] 5(a) and 5(b) are schematic diagrams illustrating the operation of the vibration damping device. [Figure 7] 5(c) and 5(d) are schematic diagrams illustrating the operation of the vibration damping device. [Figure 8] FIG. 1 is a schematic diagram showing a test apparatus to which a vibration damping device is attached. [Figure 9] FIG. 10 is a front view showing the configuration of a vibration damping device according to a comparative example. [Figure 10] FIG. 1 is a graph showing a hysteresis loop of a test specimen. [Figure 11] 10(a) to 10(e) are schematic front views showing modified examples of the vibration damping device. [Figure 12] 10(a) and 10(b) are schematic front views showing modified examples of the vibration damping unit. DETAILED DESCRIPTION OF THE INVENTION

[0009] The present invention will be described in detail below using the embodiments shown in the drawings. However, unless otherwise specified, the components, types, combinations, shapes, relative positions, etc. described in these embodiments are merely illustrative examples and do not intend to limit the scope of the present invention. Furthermore, the configurations shown in the respective embodiments can be combined as appropriate as long as they are not mutually inconsistent.

[0010] [Outline of the building and vibration control unit] 1(a) and 1(b) are front views schematically showing the vertical structural plane of a building to which a vibration control unit according to one embodiment of the present invention is attached, where 1(a) shows the initial state before deformation, and 1(b) shows the state after deformation.

[0011] The building 200 to which the vibration control unit 20 including the vibration control device 10 (10A, 10B) is to be attached comprises, as an example, two parallel columns 210 (first column 211 and second column 212) and two parallel beams 220 (upper beam 221 and lower beam 222) that are spanned between the first column 211 and the second column 212, with each column 211, 212 and each beam 221, 222 rigidly connected. The vibration control unit 20 is installed within a vertical structural face 201 formed by a first column 211, a second column 212, an upper beam 221, and a lower beam 222. Hereinafter, the side from which the structural face 201 can be observed in a roughly rectangular shape will be referred to as the front.

[0012] The vibration control unit 20 shown in this example is configured to include a stud 21 erected from a lower beam 222, and vibration control devices 10 (10A, 10B) joined to the upper end 21a of the stud 21 and to appropriate locations in the middle of the upper beam 221 in the longitudinal direction (Lh direction in the figure), connecting the two. The vibration control device 10 has a roughly arc shape when viewed from the front, and one end 10a in the longitudinal direction is fixed to the stud 21, and the other end 10b in the longitudinal direction is fixed to the upper beam 221. The vibration control device 10 is curved so as to extend along the stud 21 and the upper beam 221, ensuring space that can be effectively used within the structural face 201 even after the vibration control device 10 is installed.

[0013] The vibration control unit 20 according to one embodiment of the present invention is particularly suitable for installation in buildings in which columns 211, 212 undergo shear deformation due to vibrations such as earthquakes, as shown in Fig. 1(b). The vibration control unit 20 is suitable for installation in, for example, a steel-framed building in which the columns 211, 212 and the beams 221, 222 are rigidly connected to each other. As an example, the columns 211, 212 and the beams 221, 222 are made of square steel, H-shaped steel, angle steel, or the like. The vibration damping device will be described below.

[0014] First Embodiment <Vibration control device> Fig. 2 is a front view showing a vibration damping device according to a first embodiment of the present invention. Fig. 3 is a perspective view showing a vibration damping device according to a first embodiment of the present invention. Fig. 4 is an exploded view showing the plate-like members that make up the vibration damping device arranged in a plane. Note that bolts and nuts are not shown in Fig. 3. Fig. 4 also shows the positional relationship of the members in the initial state before deformation.

[0015] The vibration damping device 10 (11) has a generally arc-shaped configuration when viewed from the front. The vibration damping device 10 is configured by stacking at least two generally arc-shaped leaf springs (vertical member-side leaf spring 30 and horizontal member-side leaf spring 50) radially. One longitudinal end 10a of the vibration damping device 10 is attached to a stud (vertical member) 21, and the other longitudinal end 10b is attached to a beam (horizontal member) 220 (221). The vibration damping device 10 is configured to deform when the beam 220 moves in its longitudinal direction (horizontal direction), thereby absorbing vibration energy such as seismic motion.

[0016] The vibration damping device 11 includes vertical member side leaf springs 30 (30A, 30B), horizontal member side leaf springs 50, friction plates 70 (70A, 70B: friction means, friction members), and restraint means 80.

[0017] The vertical member side leaf spring (first member side leaf spring) 30 has a vertical member mounting portion (first member mounting portion) 31 at its longitudinal base end (one portion) that is mounted to the vertical member (stud 21: first member), and a laminated portion 37 (see Figure 4) that is curved longitudinally so as to be convex on one side and overlaps with another member in the thickness direction at a portion closer to the longitudinal tip than the vertical member mounting portion 31. The vertical member mounting portion 31 is the supported portion of the vertical member (supported portion of the first member) that is supported by the stud 21.

[0018] The horizontal member side leaf spring (second member side leaf spring) 50 has a horizontal member mounting portion (second member mounting portion) 51 at its longitudinal base end (one portion) that is mounted to the horizontal member (beam 220: second member), and a laminated portion 57 (see Figure 4) at a portion closer to the longitudinal tip than the horizontal member mounting portion 51 that is curved longitudinally so as to be convex on one side and overlaps with another member in the thickness direction. At least a portion of the laminated portion 57 overlaps at least a portion of the laminated portion 37 of the vertical member side leaf spring 30 in the thickness direction. The horizontal member mounting portion 51 is the horizontal member supported portion (second member supported portion) that is supported by the beam 220.

[0019] The friction plate 70 is provided between the laminated portion 37 of the vertical member side leaf spring 30 and the laminated portion 57 of the horizontal member side leaf spring 50. The friction plate 70 is held in place by being sandwiched between the horizontal member side leaf spring 50 and the vertical member side leaf spring 30. The restraining means 80 allows relative movement of the laminated portion 57 of the horizontal member side leaf spring 50 and the laminated portion 37 of the vertical member side leaf spring 30 in the longitudinal direction, and presses (presses) the laminated portion 57 of the horizontal member side leaf spring 50 against the laminated portion 37 of the vertical member side leaf spring 30.

[0020] In the vibration damping device 11, the tip 30a of the vertical member side leaf spring 30 is located closer to the tip 50b in the longitudinal direction of the horizontal member side leaf spring 50 than the horizontal member mounting part 51, and is spaced apart from the horizontal member mounting part 51. The tip 30a is configured to be able to move forward and backward (approach or move away) from the horizontal member mounting part 51 in the longitudinal direction of the leaf spring. In the vibration damping device 11, the tip 50a of the horizontal member side leaf spring 50 is located closer to the tip 30b of the vertical member side leaf spring 30 in the longitudinal direction than the vertical member mounting part 31, and is spaced apart from the vertical member mounting part 31. The tip 50a is configured to be able to move forward and backward (approach or move away) relative to the vertical member mounting part 31 in the longitudinal direction of the leaf spring.

[0021] <<Vertical side leaf spring>> The vertical member side leaf spring 30 has a vertical member mounting portion 31 at its base end in the longitudinal direction, and the remaining portion has an arc-shaped curved portion 35. The curved portion 35 is curved so as to be convex toward an imaginary intersection O where an imaginary line Lv along the longitudinal direction of the stud 21 and an imaginary line Lh along the longitudinal direction of the beam 220 intersect.

[0022] The vertical member mounting portion 31 has a shape suitable for mounting to the stud 21. The vertical member mounting portion 31 is provided, for example, on the longitudinal extension of the curved portion 35 and is configured in the shape of a rectangular flat plate. Mounting holes 33 are formed through the vertical member mounting portion 31 at appropriate positions within its surface to fasten the vertical member side leaf spring 30 to the stud 21 using bolts B1. The mounting holes 33 are circular holes. The shank of the bolt B1 is inserted into the mounting holes 33.

[0023] The vertical member mounting portion 31 is attached directly or indirectly using a mounting bracket 100 or the like to one side surface (here, the first side surface 21c) of the stud 21 that faces one side surface (here, the bottom surface 220c) of the beam 220. The vertical member mounting portion 31 is configured to be attached to the stud 21 in an orientation in which the plate surface of the curved portion 35 (or the short-side direction of the curved portion 35) extends in a direction intersecting (or perpendicular to) an imaginary plane defined by imaginary lines Lh and Lv (an imaginary plane parallel to the structural plane 201 shown in FIG. 1).

[0024] A laminated portion 37 is provided in the curved portion 35. The longitudinal length of the laminated portion 37 is equal to or shorter than the longitudinal length of the curved portion 35. The laminated portion 37 is a portion that overlaps (or has the potential to overlap) either or both of the vertical member side leaf spring 30 and the friction plate 70 in the thickness direction. The vertical member side leaf spring 30 and the friction plate 70 are in surface contact at appropriate locations of the laminated portion 37. Slots 39 are formed through the laminated portions 37 at appropriate locations within the plane. The slots 39 are used when integrating the vertical member-side leaf springs 30 with the horizontal member-side leaf springs 50 using bolts B3 and nuts N3 that constitute the restraining means 80. The shaft of the bolt B3 is inserted into the slots 39 while communicating with a round hole 59, which will be described later.

[0025] <<Horizontal side leaf spring>> The horizontal member side leaf spring 50 has a horizontal member mounting portion 51 at its base end in the longitudinal direction, and a curved portion 55 curved in an arc shape at the remaining portion. The curved portion 55 is curved so as to be convex toward an imaginary intersection O where an imaginary line Lh along the longitudinal direction of the beam 220 and an imaginary line Lv along the longitudinal direction of the partition stud 21 intersect.

[0026] The horizontal member mounting portion 51 has a shape suitable for mounting to the beam 220. The horizontal member mounting portion 51 is provided, for example, on the longitudinal extension of the curved portion 55 and is configured in the shape of a rectangular flat plate. Mounting holes 53 are formed through the horizontal member mounting portion 51 at appropriate positions within its surface to fasten the horizontal member side leaf spring 50 to the beam 220 using bolts B1. The mounting holes 53 are circular holes. The shank of the bolt B1 is inserted into the mounting holes 53.

[0027] The horizontal member mounting portion 51 is attached directly or indirectly using a mounting bracket 100 or the like to one side surface (here, the lower surface 220c) of the beam 220 that faces one side surface (here, the first side surface 21c) of the partition 21. The horizontal member mounting portion 51 is configured to be attached to the beam 220 in an orientation in which the plate surface of the curved portion 55 (or the short-side direction of the curved portion 55) extends in a direction intersecting (or perpendicular to) an imaginary plane defined by imaginary lines Lh and Lv (an imaginary plane parallel to the structural plane 201 shown in FIG. 1).

[0028] A laminated portion 57 is provided in the curved portion 55. The longitudinal length of the laminated portion 57 is equal to or shorter than the longitudinal length of the curved portion 55. The laminated portion 57 is a portion that overlaps (or has the potential to overlap) either or both of the vertical member side leaf spring 30 and the friction plate 70 in the thickness direction. The vertical member side leaf spring 30 and the friction plate 70 are in surface contact at appropriate locations of the laminated portion 57. Circular holes 59 are formed through the laminated portion 57 at appropriate positions within the plane. The circular holes 59 are used when integrating the horizontal member side leaf spring 50 with the vertical member side leaf spring 30 using the bolt B3 and nut N3 that constitute the restraining means 80. The shank of the bolt B3 is inserted into the circular hole 59 while communicating with the elongated hole 39.

[0029] <<Materials of leaf springs>> The leaf springs 30, 50 are made of a spring material that has been pre-curved to a predetermined curvature so that it can elastically deform in response to deformations that change the curvature. The leaf springs 30, 50 are made of metal, fiber-reinforced plastic (FRP), etc. Examples of metal materials that can be used include carbon steel, stainless steel, nickel alloys, and titanium alloys. Examples of fiber-reinforced plastics (FRP) that can be used include glass fiber-reinforced plastics (GFRP), carbon fiber-reinforced plastics (CFRP), etc. If the leaf springs 30, 50 are made of metal, the vibration damping device 11 can be manufactured at low cost. If the leaf springs 30, 50 are made of fiber-reinforced plastic, the vibration damping device 11 can be made lighter.

[0030] The horizontal member side leaf springs 50 and the vertical member side leaf springs 30 may be made of the same material or different materials. The vertical member side leaf springs 30A, 30B may be made of the same material or different materials. When the vibration damping device 11 includes multiple horizontal member side leaf springs 50, these may be made of the same material or different materials.

[0031] The leaf springs 30, 50 are manufactured so that they can elastically deform in response to deformations that change their curvature, can maintain the required spring constant, and can withstand, without yielding, external forces that deform the leaf springs 30, 50. As long as the leaf springs 30, 50 can exhibit the required performance, they may be made of materials other than those mentioned above.

[0032] <<Relationship between the two leaf springs>> When the vibration damping device 11 assumes its initial posture before deformation, the curvature of the curved portions 35, 55 of the leaf springs 30, 50 is set to a curvature that allows surface contact with other components (friction plates 70 in Figure 2) stacked adjacent to the leaf springs 30, 50 in the thickness direction.

[0033] When the vibration damping device 11 assumes the initial posture shown in Figure 2, as shown in Figure 4, the tip edges 30b of the vertical member side leaf springs 30A and 30B are spaced apart from the horizontal member mounting portion 51 by a predetermined distance DA1 or DA2 in the longitudinal direction, and the tip edge 50b of the horizontal member side leaf spring 50 is spaced apart from the vertical member mounting portion 31 by a predetermined distance DB in the longitudinal direction.

[0034] The distances DA1, DA2, and DB, i.e., the longitudinal positions of the leaf springs 30, 50 in the initial position, are set so that when the leaf springs 30, 50 move relative to one another in the longitudinal direction, the vertical member-side leaf spring 30 does not overlap the horizontal member mounting part 51, and the horizontal member-side leaf spring 50 does not overlap the vertical member mounting part 31. In other words, the leading edge 30b of the vertical member-side leaf spring 30 is prevented from colliding with the components fixedly attached to the beam 220 (such as the bolt B1 fastened to the horizontal member mounting part 51 and the mounting bracket 100), and the leading edge 50b of the horizontal member-side leaf spring 50 is prevented from colliding with the components fixedly attached to the stud 21 (such as the thickness adjustment member 90).

[0035] Specifically, the elastic coefficient and spring constant of each leaf spring, the friction coefficient of the friction plate, the friction force between each leaf spring and the friction plate, and the distance between the tip edge of each leaf spring and its mounting portion are appropriately set so that when the maximum design external force is applied to the horizontal member side leaf spring 50, the tip edges 30b, 50b of each leaf spring 30, 50 do not overlap with the mounting portions 31, 51. The maximum design external force is set based on, for example, the force of an earthquake with a seismic intensity of 4 or a wind speed of 15 m / sec.

[0036] Furthermore, the opening positions of the round holes 59 and the elongated hole 39 and the length of the elongated hole 39 are set so that when the round holes 59 are closest to the base edge 39a of the elongated hole 39, the leading edge 50b does not reach the vertical member mounting portion 31, and so that the leading edge 30b does not reach the horizontal member mounting portion 51. The elongated hole 39 and the round holes 59 function as a means for limiting the relative movement distance of the two leaf springs 30 and 50 in the longitudinal direction.

[0037] <<Friction plate>> The friction plate 70 is sandwiched and held between the vertical member-side leaf spring 30 and the horizontal member-side leaf spring 50. The friction plate 70 generates frictional heat when the leaf springs 30, 50 move relative to the friction plate 70, absorbing vibration energy. The friction plate 70 is roughly rectangular and curved in the longitudinal direction, and each surface of the friction plate 70 is in close contact (surface contact) with the laminated portions 37, 57. The friction plate 70 is pre-curved with a curvature such that each surface can be in surface contact with each leaf spring 30, 50 when the friction plate 70 is initially stacked with both leaf springs 30, 50 in the thickness direction.

[0038] Slots 71 and 72 are formed through the friction plate 70 at appropriate positions within its surface, extending longitudinally. The slots 71 and 72 communicate with the slots 39 in the vertical-member-side leaf springs 30 and the round holes 59 in the horizontal-member-side leaf springs 50. The slots 71 and 72 are used when integrating the friction plate 70 with the vertical-member-side leaf springs 30 and the horizontal-member-side leaf springs 50 using the bolts B3 and nuts N3 that constitute the restraining means 80. The shank of the bolt B3 is inserted through the slots 71 and 72, communicating with the slots 39 and the round holes 59.

[0039] The elongated holes 71 and 72 allow the friction plate 70 to move longitudinally relative to both the horizontal member side leaf springs 50 and the vertical member side leaf springs 30. By providing the elongated holes 71 and 72 in the friction plate 70, both sides of the friction plate 70 can be used as friction surfaces, increasing the frictional force. In other words, the efficiency of absorbing vibration energy is improved. The holes formed in the friction plate 70 may be round. In this case, the friction plate 70 is immovable relative to the horizontal member side leaf springs 50 but is movable relative to the vertical member side leaf springs 30.

[0040] The friction plate 70 is formed with elongated holes 71, 72 corresponding to the round holes 59, 59 of the horizontal member side leaf spring 50. The elongated holes 71, 72 are spaced apart, and the space between the elongated holes 71, 72 is non-porous, which prevents a decrease in the strength of the friction plate 70 due to the holes being formed through the surface of the friction plate 70.

[0041] The distance over which the horizontal member side leaf spring 50 can move relative to the friction plate 70 is set to be shorter than the distance over which the horizontal member side leaf spring 50 can move relative to the vertical member side leaf spring 30. In other words, the distance over which each round hole 59 can move relative to each long hole 71, 72 is set to be shorter than the distance over which the round holes 59 can move relative to the long hole 39 of the vertical member side leaf spring 30.

[0042] By setting the relationships between the elongated hole 39, the round holes 59, 59, and the elongated holes 71, 72 in this way, it is possible to prevent the friction plate 70 from moving relative to only one leaf spring and not the other. In other words, the friction plate 70 is able to move relative to both the horizontal member-side leaf spring 50 and the vertical member-side leaf spring 30 that it comes into contact with in the longitudinal direction of each leaf spring, thereby preventing uneven wear on each surface of the friction plate 70 and improving the efficiency of absorbing vibration energy.

[0043] A friction material (brake lining) used in a braking device of a vehicle or the like can be used for the friction plate 70. The friction material used for the friction plate 70 may be metallic, inorganic, organic, or the like.

[0044] As long as vibration energy can be absorbed by the generation of frictional heat, the vibration damping device 11 may be provided with friction means other than the friction plate 70. For example, the vibration damping device 11 may be provided with at least one of the following friction means: a high-friction surface integrally formed on the surface of the laminated portion 37 of the vertical member side leaf spring 30 facing the laminated portion 57 of the horizontal member side leaf spring 50, or a high-friction surface integrally formed on the surface of the laminated portion 57 of the horizontal member side leaf spring 50 facing the laminated portion 37 of the vertical member side leaf spring 30. The high-friction surface can be formed by a coating of paint containing a friction material, or by an uneven or rough surface formed on the surface of the leaf springs 30, 50. When the leaf springs 30, 50 have a high-friction surface, the friction plate 70 may be omitted.

[0045] <<Restraint means>> The restraining means 80 includes a bolt B3, a nut N3, and a disc spring (elastic biasing member) S3. The restraining means 80 clamps and presses the stacked members together in the thickness direction. The restraining means 80 integrates the horizontal member side leaf springs 50, the vertical member side leaf springs 30, and the friction plate 70. The restraining means 80 presses the horizontal member side leaf springs 50 and the vertical member side leaf springs 30 against the friction plate 70 while allowing the horizontal member side leaf springs 50 and the vertical member side leaf springs 30 to move relative to each other in the longitudinal direction.

[0046] The disc spring S3 has a truncated cone shape with a hole in the center, and is inserted between the nut N3 and one of the leaf springs (in this example, the vertical member side leaf spring 30B). Multiple disc springs S3 may be stacked. This figure shows three disc springs stacked on top of each other. The disc springs S3 are elastically biasing means (pressure applying means) that elastically bias (pressure) the horizontal member side leaf springs 50 and the vertical member side leaf springs 30 toward each other. The disc springs S3 press the horizontal member side leaf springs 50 and the vertical member side leaf springs 30 against the friction plate 70.

[0047] The disc spring S3 is a friction force adjusting means. The disc spring S3 constantly presses the leaf springs 30, 50 against the friction plate 70 with a force sufficient to generate friction, regardless of deformation or changes in the longitudinal position of the leaf springs 30, 50. As a result, even if the leaf springs 30, 50 are deformed, the leaf springs 30, 50 and the friction plate 70 maintain surface contact, allowing vibration energy to be absorbed. As long as both the plate springs 30 and 50 can be pressed against the friction plate 70, other elastic biasing means such as a coil spring may be provided instead of the disc spring S3.

[0048] <<Thickness adjustment material>> The illustrated vibration damping device 11 includes a thickness adjusting member 90 disposed between the vertical member mounting portions 31 of two vertical member side leaf springs 30A and 30B. The thickness adjusting member 90 has a thickness equivalent to the combined thickness of the horizontal member side leaf spring 50 and the friction plates 70 sandwiched between the adjacent vertical member side leaf springs 30A and 30B. The thickness adjusting member 90 ensures that the spacing between the vertical member side leaf springs 30A and 30B is constant throughout the entire longitudinal length of both leaf springs 30A and 30B in the initial position. The thickness adjusting member 90 may be composed of a single plate-shaped member or may be configured with multiple plate-shaped members stacked on top of each other.

[0049] Insertion holes 91 that communicate with the mounting holes 33 are formed through the thickness adjusting member 90 at appropriate positions within the surface. The shank of a bolt B1 that fixes the vibration damping device 11 to the stud 21 is inserted through the insertion hole 91. Similarly, when the vibration damping device 11 includes a plurality of horizontal member side leaf springs 50, a thickness adjusting member is inserted between the horizontal member mounting portions of adjacent horizontal member side leaf springs.

[0050] <Mounting bracket 1> The vibration damping device 11 may be attached directly to an object such as a beam 220 or a stud 21 . However, as shown in FIGS. 2 and 3, the vibration damping device 11 may be indirectly attached to an object such as a beam 220 or a stud 21 using a mounting bracket 100. 2 and 3, a mounting bracket 100 that supports a vibration damping device 11 on only one surface of an object will be described below using an example of a mounting bracket 100 attached to a beam 220.

[0051] The mounting bracket 100 comprises a support bracket 110 that is arranged on the lower surface 220c side (one side) of the beam 220 and supports the vibration damping device 11, and a reinforcing plate 120 that is arranged on the opposite side (upper surface 220d side, other side) of the support bracket 110 with the beam 220 sandwiched therebetween.

[0052] <<Support bracket>> The support bracket 110 comprises a flat connecting material 111 having a screw hole 112 on one side that communicates with the mounting hole 53 of the horizontal member mounting portion 51, and a reinforcing material 113 that supports the connecting material 111 on one side and has the other side fixed in close contact with the underside 220c of the beam 220. The connecting material 111 has an area that allows the entire plate surface of the horizontal member mounting portion 51 to come into close contact with it. The connecting material 111 in this example is a rectangular flat plate with an area equivalent to that of the horizontal member mounting portion 51. A bolt B1 is threaded into the screw hole 112. The horizontal member mounting portion 51 is fastened to the connecting material 111 using the bolt B1.

[0053] The reinforcing material 113 is a plate-like member having a larger area than the connecting material 111. The reinforcing material 113 in this example is a rectangular flat plate, and has protruding portions 114, 114 at both ends in the longitudinal direction of the beam 220 that protrude outward beyond the connecting material 111. Screw holes 115... into which the shanks of bolts B4 are screwed are formed at appropriate positions within the surface of the protruding portions 114, 114. The screw holes 115... are formed, for example, at the four corners of the reinforcing material 113. The reinforcing material 113 plays a role in alleviating stress applied locally to the beam 220 by the vibration damping device 11.

[0054] The support bracket 110 is capable of fixing the vibration damping device 11 to the beam 220, transmitting the displacement of the beam 220 due to vibration to the vibration damping device 11, and is made of a material strong enough to withstand the reaction force from the vibration damping device 11. For example, the support bracket 110 can be made of steel, and the connecting member 111 and the reinforcing member 113 can be integrated by welding.

[0055] <<Reinforcing plate>> The reinforcing plate 120 is a plate-like member with one surface in close contact with the upper surface 220d of the beam 220. The reinforcing member 113 according to this example is a rectangular flat plate, and has the same area as the reinforcing member 113. Through holes 121 that communicate with the screw holes 115 are formed in appropriate positions within the surface of the reinforcing plate 120. The through holes 121 are formed, for example, in the four corners of the reinforcing member 113. The reinforcing plate 120 serves to relieve stress locally applied to the beam 220 by the vibration damping device 11 .

[0056] <<Installation method>> As shown in FIG. 2, the beam 220 is formed with a hole 225 through which the shank of the bolt B4 is inserted. Reinforcing member 113 of support bracket 110 is attached to lower surface 220c of beam 220, and reinforcing plate 120 is attached to upper surface 220d of beam 220. With screw hole 115 of support bracket 110 and through hole 121 of reinforcing plate 120 communicating with hole 225 of beam 220, the shank of bolt B4 is inserted through through hole 121 and hole 225 and screwed into screw hole 115, thereby fastening support bracket 110 and reinforcing plate 120 to beam 220.

[0057] With the mounting hole 53 of the horizontal member side leaf spring 50 and the screw hole 112 of the support bracket 110 connected to each other, the shaft of the bolt B1 can be screwed into the screw hole 112 via the mounting hole 53, thereby fixing the vibration control device 11 to the beam 220 via the horizontal member side leaf spring 50.

[0058] By adjusting the length of the shaft of bolt B4 according to the size of beam 220, it is possible to prevent the tip of bolt B4 from protruding as little as possible from reinforcing member 113. In this way, it is possible to prevent tip 30a of the leaf spring located at the outermost periphery of vibration damping device 11 (here, vertical member side leaf spring 30A) from interfering with bolt B4.

[0059] As shown in FIG. 2, the mounting bracket 100 can also be attached to a stud 21 in the same manner to support the vibration damping device 11 (vertical member mounting portion 31).

[0060] <Mounting bracket 2> FIG. 5 is a front view illustrating an example in which two vibration damping devices are attached to a stud. Next, the mounting bracket 100B that supports the vibration damping devices 11 (10), 11 (10) on both sides of the object will be described using an example of a mounting bracket attached to a stud 21.

[0061] The mounting bracket 100B comprises a support bracket 110 that is arranged on the first side 21c (one side) of the partition 21 and supports the vibration damping device 11, and a support bracket 110B that is arranged on the opposite side (second side 21d, other side) of the support bracket 110 with the partition 21 in between. The support fitting 110B has through holes 115B... formed through the reinforcing material 113B instead of the screw holes 115... formed through the reinforcing material 113 of the support fitting 110. The shank of a bolt B4 is inserted through the through hole 115B.

[0062] As shown in the figure, a hole 23 is formed through the stud 21, through which the shank of the bolt B4 is inserted. Support bracket 110 is attached to first side surface 21c of stud 21, and support bracket 110B is attached to second side surface 21d of stud 21. With through hole 115B and screw hole 115 communicating with hole 23 of stud 21, the shank of bolt B4 is inserted through through hole 115B and hole 23 and the shank is screwed into screw hole 115, thereby fastening support bracket 110B to stud 21. With the mounting hole 33 of the vertical member side leaf spring 30 and the screw hole 112 of the support bracket 110 connected to each other, the shaft of the bolt B1 can be screwed into the screw hole 112 via the mounting hole 33, thereby fixing the vibration control device 11 to the stud 21 via the vertical member side leaf spring 30.

[0063] By attaching the mounting bracket 100B to the beam 220, the vibration damping devices 11, 11 can be fixed to the lower surface 220c side and the upper surface 220d side, respectively, at the same position in the longitudinal direction of the beam 220.

[0064] <Vibration control unit> As shown in Figures 1(a) and (b), the vibration control unit 20 comprises a stud 21 erected from a lower beam 222, and a vibration control device 10 (10A, 10B) joined to the upper end 21a of the stud 21 and to an appropriate position in the middle of the upper beam 221 in the longitudinal direction (left-right direction in the figure), connecting the two. The vibration damping unit 20 includes at least one vibration damping device 10 (either one of the vibration damping devices 10A and 10B). Stud 21 is erected at a position corresponding to the middle part of upper beam 221 in the longitudinal direction so that upper end portion (one end portion in the longitudinal direction) 21a is spaced apart from upper beam 221.

[0065] The vibration control device 10A has an approximately arc shape when viewed from the front, and one longitudinal end 10a is fixed to the upper end 21a of the partition wall 21, which is the first side surface 21c facing the first longitudinal end 220a of the upper beam 221, and the other longitudinal end 10b is fixed at an appropriate position near the first longitudinal end 220a of the upper beam 221.

[0066] The vibration control device 10B has an approximately arc-shaped configuration when viewed from the front, and one longitudinal end 10a is fixed to the upper end 21a of the partition wall 21, which is the second side surface 21d facing the second longitudinal end 220b of the upper beam 221, and the other longitudinal end 10b is fixed at an appropriate position near the second longitudinal end 220b of the upper beam 221.

[0067] Here, "the upper end 21a of the stud 21 is spaced apart from the upper beam 221" means that the upper beam 221 is configured to be able to move relative to the stud 21 along its own longitudinal direction (Lh direction). The stud 21 is connected to the upper beam 221 via the vibration control device 10, and the stud 21 itself is not rigidly or pin-jointed to the upper beam 221. Therefore, the longitudinal position of the upper beam 221 is allowed to shift relative to the tip of the stud 21. Lower end portion 21b (the other end portion in the longitudinal direction) of stud 21 is rigidly joined to lower beam 222. That is, stud 21 has a rigid joint portion at lower end portion 21b that is rigidly joined to lower beam 222.

[0068] <Operational aspects of vibration damping device> 6(a), (b) and 7(c), (d) are schematic diagrams illustrating the operation of the vibration damping device. Figure 6(a) shows the state (initial state) of the vibration damping device 10 before deformation. The upper beam 221 is in its initial position. Figures 6(b), 7(c), and 7(d) show the states (deformed states) of the vibration damping device 10 when external forces F1, F1', and F2 are applied to the horizontal member mounting portion 51 via the upper beam 221.

[0069] As shown in FIG. 6(b), when an external force F1 acting to the left in the figure is applied to the upper beam 221, the upper beam 221 is displaced by a distance X1 to the left in the figure from the initial position. When the external force F1 is smaller than the frictional forces of the friction plates 70, 70, each plate spring 30, 50 of the vibration damping devices 10A, 10B elastically deforms without sliding in the longitudinal direction and follows the displacement of the upper beam 221.

[0070] As shown in FIG. 7(c), when an external force F1′ greater than the frictional forces of the friction plates 70, 70 acting to the left in the figure is applied to the upper beam 221, the upper beam 221 is displaced by a distance X2 to the left in the figure from the initial position (X1 < X2). At the same time, each plate spring 30, 50 of the vibration damping devices 10A, 10B slides a distance Y1 in the longitudinal direction from the initial position, and the vibration energy is converted into heat energy and consumed.

[0071] As shown in FIG. 7(d), when an external force F2 acting to the right in the figure is applied to the upper beam 221, the upper beam 221 is displaced to the right in the figure. This figure shows a state in which, for the upper beam 221, a displacement of a distance X3 (< X2) to the left in the figure remains from the initial position. Each plate spring 30, 50 of the vibration damping devices 10A, 10B elastically deforms without sliding in the longitudinal direction and follows the displacement of the upper beam 221.

[0072] Furthermore, when an external force greater than the external force F2 and greater than the frictional forces of the friction plates 70, 70 acting to the right in the figure is applied to the upper beam 221, the upper beam 221 is further displaced to the right in the figure, and each plate spring 30, 50 of the vibration damping devices 10A, 10B slides in the longitudinal direction, and the vibration energy is converted into heat energy and consumed. Thereafter, when the upper beam 221 returns to the initial position shown in FIG. 6(a), the vibration damping devices 10A, 10B also return to the initial state.

[0073] In this way, when external forces F1, F1', F2 are applied to the horizontal member mounting part 51, moving the horizontal member side leaf spring 50 in a direction corresponding to the longitudinal direction of the upper beam 221, while the angle between the upper beam 221 and the stud 21 (or the angle between the horizontal member mounting part 51 and the vertical member mounting part 31) is maintained, the vertical member side leaf spring 30 and the horizontal member side leaf spring 50 move relatively forward and backward in the longitudinal direction. At this time, the tip edge 30b of the vertical member side leaf spring 30 moves toward or away from the horizontal member mounting part 51, without overlapping with the horizontal member mounting part 51 in the thickness direction. The tip edge 50b of the horizontal member side leaf spring 50 moves toward or away from the vertical member mounting part 31, without overlapping with the vertical member mounting part 31 in the thickness direction.

[0074] In the vibration damping devices 10A and 10B, vertical member side leaf springs 30, 30 that are fixed to the studs 21 but not to the upper beam 221 and horizontal member side leaf springs 50 that are fixed to the beam 221 but not to the studs 21 are stacked in the thickness direction. As a result, the horizontal member side leaf springs 50 follow the horizontal displacement of the upper beam 221, displacing in their longitudinal direction while rubbing against the friction plates 70, 70. This allows vibration energy to be converted into heat energy through friction and consumed, allowing for efficient absorption of vibration energy.

[0075] <Operation of the vibration control unit> The deformation of the vertical structural plane and the vibration control unit will be explained based on Figures 1(a) and 1(b). Figure 1(a) shows the initial state corresponding to Figure 6(a), and Figure 1(b) shows the deformed state corresponding to Figure 7(c). As shown in FIG. 1(a), in the initial state, the columns 211 and 212 are not subjected to shear deformation. As shown in Figure 1(b), assume that the upper beam 221 is displaced a distance X2 from its initial position to the left in the figure. Because the columns 211, 212 and the beams 221, 222 are rigidly connected, each joint maintains a right angle, and the columns 211, 212 undergo shear deformation. Because the lower end 21b of the stud 21 is rigidly connected to the lower beam 222, the lower end 21b of the stud 21 and the lower beam 222 maintain a right angle, and the vibration damping devices 10A, 10B deform as shown in Figure 7(c).

[0076] [Vibration control device testing] <Test equipment> FIG. 8 is a schematic diagram showing a test apparatus to which a vibration damping device is attached. The test device 300 for testing the vibration damping device 10 includes a reaction column 301 erected so as to maintain a vertical posture against a horizontal pressing force, a first support base 303 fixed to one side surface 301a of the reaction column 301 and to which the vertical member mounting portion 31 of the test body 320 (vibration damping device) is fixed, and a second support base 305 fixed to one side surface 307a opposite the reaction column 301 and to which the horizontal member mounting portion 51 of the test body 320 is fixed, so that the test device 300 can move forward and backward relative to the reaction column 301. a linear guide 309 arranged below the force application block 307 and supporting the force application block 307 so that the block 307 can move back and forth horizontally relative to the reaction column 301; a hydraulic jack 311 having an output end 311a fixed to an opposite surface 307b of one side surface 307a of the force application block 307 and installed in a recumbent position so as to be expandable and contractable horizontally; and a reaction frame 313 supporting a base end 311b of the hydraulic jack 311.

[0077] The reaction column 301 corresponds to the vertical member, and the force application block 307 reproduces the horizontal displacement of the horizontal member. When the hydraulic jack 311 extends or retracts, the horizontal member mounting portion 51 moves back and forth horizontally (approaching or moving away from the reaction column 301) via the force application block 307, deforming the test specimen 320.

[0078] <Test specimen> As the test specimen 320, the vibration damping device 11 according to the embodiment shown in FIG. 2 etc. and the vibration damping device 330 according to the comparative example shown in FIG. 9 were prepared.

[0079] FIG. 9 is a front view showing the configuration of a vibration damping device according to a comparative example. The vibration damping device 330 according to the comparative example differs in configuration from the vibration damping device 11 according to the embodiment in that it includes a vertical member mounting portion 341 that is attached to a vertical member at the tip of a horizontal member side leaf spring 340. The vertical member mounting portion 341 has mounting holes 343... that communicate with the mounting holes 33... and overlaps the vertical member mounting portions 31, 31 in the thickness direction. The other configurations of the vibration damping device 330 are the same as those of the vibration damping device 11. The vertical member mounting portion 31 of the vertical member side leaf spring 30 and the vertical member mounting portion 341 of the horizontal member side leaf spring 340 are fixed to the reaction column 301 of the testing device 300 via a first support base 303.

[0080] The common specifications of the vibration damping devices 11 and 330 according to the example and the comparative example are as follows.

[0081] [Table 1]

[0082] In this test, a 2000 kN hydraulic jack was used as the hydraulic jack 311. The load applied to the vibration damping device 11, 330 was measured by a load cell (not shown) attached to the tip of the hydraulic jack 311. The displacement of the vibration damping device 11, 330 was measured by installing a wire displacement meter (not shown) on the force application block 307 and attaching the tip of the wire to an appropriate position on the reaction column 301.

[0083] <Test Results> FIG. 10 is a graph showing the hysteresis loop of the test specimen. The results of the static cyclic loading test are as follows (Table):

[0084] [Table 2]

[0085] In the example and the comparative example, vibration energy was absorbed by friction, but the amount of energy absorbed by the vibration damping device 11 according to the example was approximately 3.4 times that of the vibration damping device 330 according to the comparative example. In the comparative example, since the horizontal member side leaf spring 340 is fixed to the reaction column 301, the longitudinal deviation between the vertical member side leaf spring 30 and the horizontal member side leaf spring 340 is small, and deformation within the elastic range becomes dominant, resulting in a relatively small amount of energy absorption.

[0086] On the other hand, in the Example, the horizontal member side leaf springs 50 were not fixed to the reaction column 301, and the vertical member side leaf springs 30 were not fixed to the force application block 307. For this reason, the Example yielded when force was applied, and a large misalignment occurred between the horizontal member side leaf springs 50 and the vertical member side leaf springs 30 (see Figure 7). In the Example, it was proven that frictional force effectively acts between the horizontal member side leaf springs 50 and the vertical member side leaf springs 30, resulting in high damping performance. The Example was proven to be effective as a vibration control device.

[0087] [Modification] <Modifications of the vibration damping device> 11(a) to 11(e) are schematic front views showing modified examples of the vibration damping device, in which bolts and nuts are omitted from the illustration.

[0088] As shown in Figure 11(a), the vibration damping device 12 (10) only needs to include at least one vertical member side leaf spring 30 and at least one horizontal member side leaf spring 50. Between the adjacent vertical member side leaf spring 30 and horizontal member side leaf spring 50, a friction means such as a friction plate 70 is provided. As shown in Figure 11(b), the vibration damping device 13 (10) may be configured to include two or more vertical member side leaf springs 30, 30 and two or more horizontal member side leaf springs 50, 50, and friction means such as friction plates 70... may be provided between adjacent vertical member side leaf springs 30 and horizontal member side leaf springs 50. The number of vertical member side leaf springs 30 and horizontal member side leaf springs 50 provided in the vibration damping device 13 is set based on the magnitude of the external force and the allowable strength of the structure to which the vibration damping device 13 is attached. As shown in FIG. 11(c), the leaf springs located on the outermost periphery of the vibration damping device 14 (10) may be horizontal member leaf springs 50.

[0089] As shown in Figure 11(d), the vertical member mounting portion 31A and the horizontal member mounting portion 51A of the vibration damping device 15 (10) may be plate-shaped portions that protrude so as to intersect (or be perpendicular to) the curved portions 35, 55 (see Figure 2) of each leaf spring 30, 50. 11(e), in the vibration damping device 16(10), the horizontal member side leaf spring 50C may have a horizontal member mounting portion 51 at its longitudinal middle portion (one portion), one longitudinal end portion overlapping the vertical member side leaf springs 30A, 30B and friction plates 70A, 70B in the thickness direction, and the other longitudinal end portion overlapping the vertical member side leaf springs 30C, 30D and friction plates 70C, 70D in the thickness direction. The vibration damping device 16 has a vertical member mounting portion 31A at one longitudinal end portion and a vertical member mounting portion 31B at the other longitudinal end portion. The vibration control unit 20 including the vibration control device 16 is configured to include studs 21A and 21B to which the vertical member mounting portions 31A and 31B are fixed, respectively.

[0090] <Possibility of attaching the vibration control device to other objects> The vibration damping device 10 can absorb vibration energy even when it is attached across vertical and horizontal members (structural members) that are joined so that the angle of the joint becomes acute or obtuse, as in a wooden building. In this case, the curvature of the leaf springs on the vertical and horizontal members changes as the angle of the joint changes, causing friction between the two leaf springs, and this friction allows the vibration damping device 10 to absorb vibration energy.

[0091] In the above embodiment, an example has been shown in which the vibration damping device 10 is attached across a vertical member (partition stud 21) and a horizontal member (beam 220) that extend in mutually perpendicular directions. However, the vibration damping device 10 may also be attached across two perpendicular members other than a vertical member and a horizontal member.

[0092] The vibration damping device may also be configured to be mounted across two members whose longitudinal directions are not perpendicular to each other. That is, the vibration damping device may be mounted across a first member whose longitudinal direction extends in a first direction instead of a vertical member, and a second member whose longitudinal direction extends in a second direction intersecting the first direction instead of a horizontal member. In this case, the curvature of each leaf spring of the vibration damping device and the angle between the mounting portions of each leaf spring (or the angle between the extension lines of the longitudinal ends of each leaf spring) are appropriately set depending on the angle between the first and second members to which the vibration damping device is mounted. By arranging the convex sides of both leaf springs along the first and second members, a large remaining space free from interference by the vibration damping device can be secured within the plane (space) defined by the first and second directions.

[0093] <Modification of vibration control unit> 12(a) and 12(b) are schematic front views showing modified examples of the vibration damping unit. 12(a), the vibration control unit 20 may include vibration control devices 10A and 10B at the lower end 21b of the stud 21. In this example, the lower end 21b of the stud 21 is connected to a lower beam 222 via the vibration control devices 10A and 10B, and the upper end 21a of the stud 21 is rigidly joined to an upper beam 221. 12(b), the vibration control unit 20 may include a vibration control device 10 at each of the upper end 21a and lower end 21b of the stud 21. That is, the upper end 21a of the stud 21 may be connected to an upper beam 221 via vibration control devices 10A and 10B, and the lower end 21b of the stud 21 may be connected to a lower beam 222 via vibration control devices 10C and 10D.

[0094] [Summary of Examples of Embodiments, Actions, and Effects of the Present Invention] <First embodiment> The vibration damping device 10 according to this embodiment has a vertical member supported portion (vertical member mounting portion 31) supported by a vertical member (stud 21) at one longitudinal position (base end portion), and a vertical member side leaf spring 30 having a laminated portion 37 that is curved longitudinally so as to be convex on one side and overlaps with another member in the thickness direction at a position closer to the longitudinal tip than the vertical member supported portion; and a horizontal member supported portion (horizontal member mounting portion 51) supported by a horizontal member (beam 220) at one longitudinal position (base end portion). The horizontal member side leaf spring 50 has a laminated portion 57 that is curved longitudinally so as to be convex on one side at a position closer to the longitudinal tip than the supported portion of the horizontal member and that overlaps with another member in the thickness direction, and the laminated portion is overlapped in the thickness direction with the laminated portion of the vertical member side leaf spring, and a restraining means 80 that allows relative movement of the laminated portion of the vertical member side leaf spring and the laminated portion of the horizontal member side leaf spring in the longitudinal direction and presses the laminated portion of the vertical member side leaf spring against the laminated portion of the horizontal member side leaf spring.

[0095] In the vibration control device, the tip portion 30a of the vertical member side leaf spring is configured to be able to move back and forth in the longitudinal direction relative to the supported portion of the horizontal member, and the tip portion 50a of the horizontal member side leaf spring is configured to be able to move back and forth in the longitudinal direction relative to the supported portion of the vertical member.

[0096] According to this aspect, the vibration damping function can be effectively exerted even when the vertical member and horizontal member to which the vibration damping device is attached are displaced in a manner that does not involve angular displacement relative to each other. In other words, even if the horizontal member is displaced along its longitudinal direction without changing its angle relative to the vertical member, the tip ends of both leaf springs will approach or move away from each other's supported portion in the longitudinal direction, so the vibration energy between the two leaf springs can be converted into thermal energy through friction and consumed.

[0097] According to this aspect, even after the vibration control device is installed, the space can be effectively utilized. That is, the vibration control device is configured by stacking multiple leaf springs that are curved so that they are convex on one side. By installing the convex sides of both leaf springs along the vertical and horizontal members, the remaining space within the structural surface composed of the vertical and horizontal members can be made larger.

[0098] <Second embodiment> The vibration control device 10 of this embodiment is characterized in that, when external forces F1, F1', F2 that move the horizontal member side leaf spring 50 back and forth in a direction corresponding to the longitudinal direction of the horizontal member (beam 220) are applied to the horizontal member supported portion (horizontal member mounting portion 51), the tip edge 50b of the horizontal member side leaf spring moves toward or away from the vertical member supported portion (vertical member mounting portion 31) within a range that does not overlap with the vertical member supported portion, and the tip edge 30b of the vertical member side leaf spring 30 moves toward or away from the horizontal member supported portion within a range that does not overlap with the horizontal member supported portion.

[0099] For example, the elastic coefficient of each leaf spring, the spring constant, the friction coefficient of the friction plate, the friction force between each leaf spring and the friction plate, and the distance between the tip edge of each leaf spring and the mounting portion of each leaf spring are appropriately set so that the tip edge of each leaf spring does not overlap the supported portion of the other leaf spring even when the maximum external force designed for that spring is applied to both leaf springs. Furthermore, the distance of movement of each leaf spring in the longitudinal direction can be limited so that the leading edge of each leaf spring does not overlap the supported portion of the other leaf spring.

[0100] <Third embodiment> The vibration damping device according to this embodiment is characterized by having a friction means (friction plate 70, high friction surface) provided between the laminated portion 37 of the vertical member side leaf spring 30 and the laminated portion 57 of the horizontal member side leaf spring 50. According to this aspect, a friction means is disposed between both leaf springs to generate a large friction force, thereby achieving high damping performance.

[0101] <Fourth embodiment> In the vibration damping device 10 according to this embodiment, the friction means is a friction member (friction plate 70) that is clamped and held between the vertical member side leaf spring 30 and the horizontal member side leaf spring 50. The friction member can be a friction material (brake lining) used in the braking device of a vehicle, etc. The material of the friction member may be metallic, inorganic, organic, or the like.

[0102] <Fifth embodiment> In the vibration damping device 10 according to this embodiment, the friction member (friction plate 70) is characterized in that it is configured to be movable relative to both the vertical member side leaf spring 30 and the horizontal member side leaf spring 50 that come into contact with the friction member in the longitudinal direction of each leaf spring. Since the friction member moves relative to both leaf springs, both sides of the friction plate can effectively function as friction surfaces, thereby improving the efficiency of absorbing vibration energy.

[0103] <Sixth embodiment> In the vibration damping device 10 according to this embodiment, the friction means is characterized by including at least one of a high-friction surface integrally formed on the stacked portion 37 of the vertical member side leaf spring 30 and a high-friction surface integrally formed on the stacked portion 57 of the horizontal member side leaf spring 50. According to this aspect, the friction means is integrated with the leaf spring, so the vibration damping device can be made compact.

[0104] <Seventh embodiment> In the vibration damping device 10 according to this embodiment, the restraining means 80 is characterized by including elastic biasing means (disc springs S3) that elastically bias the vertical member side leaf springs 30 toward the horizontal member side leaf springs 50 side. In this embodiment, both leaf springs can be constantly pressed against the friction means with a force that can generate a sufficient friction force between both leaf springs. According to this aspect, even if both leaf springs are deformed, the contact state between both leaf springs and the friction means can be maintained, and vibration energy can be effectively absorbed.

[0105] <Eighth embodiment> In the vibration control device 10 of this embodiment, the vertical member supported portion (vertical member mounting portion 31) and the horizontal member supported portion (horizontal member mounting portion 51) are configured so that the plate surfaces of both laminated portions 37, 57 extend in a direction intersecting a virtual plane (a virtual plane parallel to the structural face 201) defined by the vertical member (partition stud 21) and the horizontal member (beam 220). According to this aspect, the plate surfaces of the laminated portions of both leaf springs are not parallel to the structural face, so that the space within the structural face can be effectively utilized even when a vibration damping device is installed.

[0106] <Ninth embodiment> The vibration damping device 10 according to this embodiment has, at one longitudinal position (base end), a first member supported portion (vertical member mounting portion 31) that is supported by a first member (stud 21) whose longitudinal direction extends in a first direction (direction of imaginary line Lv), and a first member side leaf spring (vertical member side leaf spring 30) that has, at a position closer to the longitudinal tip than the first member supported portion, a laminated portion 37 that is curved in the longitudinal direction so as to be convex on one side and that overlaps with another member in the thickness direction; and a second member (beam 220) that is, at one longitudinal position (base end), a second member (beam 220) whose longitudinal direction extends in a second direction (direction of imaginary line Lh) that intersects the first direction. and a second member side leaf spring (horizontal member side leaf spring 50) having a second member supported portion (horizontal member mounting portion 51) that is supported by the second member, and a portion closer to the longitudinal tip than the second member supported portion has a laminated portion 57 that is curved longitudinally so as to be convex on one side and that overlaps with another member in the thickness direction, and the laminated portion is overlapped in the thickness direction with the laminated portion of the first member side leaf spring; and a restraining means 80 that allows relative movement of the laminated portion of the first member side leaf spring and the laminated portion of the second member side leaf spring in the longitudinal direction and applies pressure to the laminated portion of the first member side leaf spring toward the laminated portion of the second member side leaf spring.

[0107] In the vibration damping device, the tip portion 30a of the first member side leaf spring is configured to be able to move back and forth in the longitudinal direction relative to the supported portion of the second member, and the tip portion 50a of the second member side leaf spring is configured to be able to move back and forth in the longitudinal direction relative to the supported portion of the first member.

[0108] The vibration damping device may be attached across a combination of a first member and a second member to which the device is attached, even if the first member and the second member are not perpendicular to each other. According to this aspect, the vibration damping function can be effectively exerted even when the first member and the second member to which the vibration damping device is attached are displaced in a manner that does not involve angular displacement relative to each other. In other words, even if the second member is displaced along its longitudinal direction without changing its angle relative to the first member, the tip ends of both leaf springs move closer to or farther away from each other's supported portion in the longitudinal direction, so that vibration energy between the two leaf springs can be converted into thermal energy due to friction and consumed.

[0109] According to this aspect, even after the vibration damping device is installed, the space can be effectively utilized. That is, the vibration damping device has a configuration in which multiple leaf springs, each curved so that it is convex on one side, are stacked. By placing the convex sides of both leaf springs along the first and second members, it is possible to secure a large remaining space within the space defined by the longitudinal directions of the first and second members that is not affected by the vibration damping device. [Explanation of symbols]

[0110] Lv...virtual line (along the longitudinal direction of the vertical member), Lh...virtual line (along the longitudinal direction of the horizontal member), O...virtual intersection (where virtual lines Lv and Lh intersect), B1 to B4...bolt, N3...nut, S3...disc spring (elastic biasing means, pressure means), DA1, DA2, DB...distance, F1, F1', F2...external force, X1, X2, X3...distance (horizontal displacement of the beam), Y1...distance (displacement of the leaf spring on the horizontal member), 10, 10A to 10D, 11 to 16...vibration damping device, 10a...one end, 10b...other end, 20...vibration damping unit, 21, 21A, 21B...stud (vertical member, first member), 21a...top End, 21b...lower end, 21c...first side surface, 21d...second side surface, 23...hole, 30, 30A to 30D...vertical member side leaf spring (first member side leaf spring), 30a...tip portion, 30b...tip edge, 31, 31A, 31B...vertical member mounting portion (vertical member supported portion, first member mounting portion, first member supported portion), 33...mounting hole, 35...curved portion, 37...laminated portion, 39...long hole, 39a...edge, 50, 50C...horizontal member side leaf spring (second member side leaf spring), 50a...tip portion, 50b...tip edge, 51, 51A...horizontal member mounting portion (horizontal member supported portion, second member mounting portion, second member supported portion), 53...mounting hole , 55... curved portion, 57... laminated portion, 59... round hole, 70, 70A to 70D... friction plate (friction means, friction member), 71, 72... long hole, 80... restraint means, 90... thickness adjustment member, 91... insertion hole, 100, 100B... mounting bracket, 110, 110B... support bracket, 111... connecting material, 112... screw hole, 113, 113B... reinforcement material, 114... protrusion, 115... screw hole, 115B... through hole, 120... reinforcement plate, 121... through hole, 200... building, 201... structural surface, 210... column, 211... first column, 212... second column, 220... beam (horizontal member, second member), 220a... first end, 2 20b...second end, 220c...lower surface, 220d...upper surface, 221...upper beam (horizontal member, second member), 222...lower beam (horizontal member, second member), 225...hole, 300...test equipment, 301...reaction column, 301a...one side, 303...first support base, 305...second support base, 307...force application block, 307a...one side, 307b...opposite side, 309...linear guide, 311...hydraulic jack, 311a...output end, 311b...base end, 313...reaction frame, 320...test specimen, 330...vibration control device, 340...horizontal member side leaf spring, 341...vertical member mounting portion, 343...mounting hole.

Claims

1. a vertical member side leaf spring having a vertical member supported portion supported by a vertical member at one position in the longitudinal direction, and a laminated portion curved in the longitudinal direction so as to be convex on one side at a position closer to the tip of the vertical member supported portion in the longitudinal direction and overlapping with another member in the thickness direction; a horizontal member side leaf spring having a horizontal member supported portion at one longitudinal position that is supported by a horizontal member, and a laminated portion that is curved longitudinally so as to be convex on one side at a position closer to the longitudinal tip than the horizontal member supported portion and that overlaps with another member in the thickness direction, and the laminated portion is overlapped in the thickness direction with the laminated portion of the vertical member side leaf spring; and a restraining means for allowing relative movement of the stacked portions of the vertical member side leaf springs and the stacked portions of the horizontal member side leaf springs in the longitudinal direction and for pressing the stacked portions of the vertical member side leaf springs against the stacked portions of the horizontal member side leaf springs, A vibration damping device characterized in that the tip of the vertical member side leaf spring is configured to be able to move back and forth in the longitudinal direction relative to the horizontal member supported portion, and the tip of the horizontal member side leaf spring is configured to be able to move back and forth in the longitudinal direction relative to the vertical member supported portion.

2. When an external force that moves the horizontal member side leaf spring back and forth in a direction corresponding to the longitudinal direction of the horizontal member is applied to the horizontal member supported portion, The tip edge of the horizontal member side leaf spring approaches or moves away from the vertical member supported portion within a range that does not overlap with the vertical member supported portion, 2. The vibration damping device according to claim 1, wherein the tip edge of the vertical member side leaf spring is configured to move toward or away from the horizontal member supported portion within a range that does not overlap with the horizontal member supported portion.

3. 3. The vibration damping device according to claim 1, further comprising a friction means provided between the laminated portion of the horizontal member side leaf spring and the laminated portion of the vertical member side leaf spring.

4. 4. The vibration damping device according to claim 3, wherein the friction means is a friction member that is clamped and held between the horizontal member side leaf spring and the vertical member side leaf spring.

5. 5. The vibration damping device according to claim 4, wherein the friction member is configured to be movable relative to both the horizontal member side leaf spring and the vertical member side leaf spring that contact the friction member in the longitudinal direction of each leaf spring.

6. 4. The vibration damping device according to claim 3, wherein the friction means includes at least one of a high-friction surface integrally formed on the stacked portion of the vertical member side leaf spring and a high-friction surface integrally formed on the stacked portion of the horizontal member side leaf spring.

7. 4. The vibration damping device according to claim 3, wherein the restraining means includes elastic biasing means for elastically biasing the vertical member side leaf springs toward the horizontal member side leaf springs.

8. A vibration damping device as described in claim 1 or 2, characterized in that the vertical member supported portion and the horizontal member supported portion are configured so that the plate surfaces of both laminated portions extend in a direction intersecting an imaginary plane defined by the vertical member and the horizontal member.

9. a first-member side leaf spring having, at a longitudinal position thereof, a first-member supported portion supported by a first member whose longitudinal direction extends in a first direction, and having, at a position closer to the longitudinal tip than the first-member supported portion, a laminated portion that is curved in the longitudinal direction so as to be convex on one side and that overlaps with another member in the thickness direction; a second-member side leaf spring having, at a longitudinal position thereof, a second-member supported portion supported by a second member extending in a second direction intersecting the first direction, and a laminated portion curved in the longitudinal direction so as to be convex on one side and overlapping with another member in the thickness direction at a position closer to the longitudinal tip than the second-member supported portion, the laminated portion overlapping with the laminated portion of the first-member side leaf spring in the thickness direction; a restraining means for allowing relative movement of the laminated portions of the first and second member side leaf springs in the longitudinal direction and for pressing the laminated portions of the first member side leaf springs against the laminated portions of the second member side leaf springs, A vibration damping device characterized in that a tip portion of the first member side leaf spring is configured to be able to move back and forth in the longitudinal direction relative to the supported portion of the second member, and a tip portion of the second member side leaf spring is configured to be able to move back and forth in the longitudinal direction relative to the supported portion of the first member.

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