Vibration control unit and vibration control device

Abstract

To provide a vibration control unit having a novel structure which can efficiently exert a vibration control effect with respect to vibration in a vertical direction which causes a problem in a construction structure, and a vibration control device which is suitably used in the vibration control unit.SOLUTION: A vibration control unit 10 attached to a construction structure A, and reducing the vibration of the construction structure A in a vertical direction has a support base 12 fixedly attached to a structure material a of the construction structure A as a main vibration system. A plurality of sub-vibration systems 14 are constituted by the elastic connection of a plurality of mass members 20 to the support base 12 by connecting members 22 having spring elements and attenuation elements, and a TMD having a plurality of natural frequencies in the vertical direction is constituted of the plurality of sub-vibration systems 14.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a vibration damping device unit that reduces vertical vibrations in an architectural structure, and a vibration damping device that is suitably used in the vibration damping device unit. [Background technology]

[0002] Conventionally, as a vibration control device for reducing the up-down (vertical) vibration generated in an architectural structure, for example, as described in JP 2017-198228 A (Patent Document 1), a secondary vibration system is configured for the architectural structure, which is the primary vibration system, by supporting a mass body for the architectural structure with a connecting member. Such a vibration control device configures a Tuned Mass Damper (TMD) by tuning the natural frequency of the secondary vibration system to the frequency range of the up-down vibration that is problematic in the architectural structure. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-198228 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, the exciting forces of vertical vibrations that are problematic in architectural structures include walking vibrations and mechanical vibrations that are applied from inside the architectural structure, as well as earthquake vibrations and traffic vibrations that are applied from outside the architectural structure, and there are many different vibration transmission paths to the problematic vibration parts. In addition, the vibration modes of each structural member that constitutes the vibration transmission path are also diverse, and each structural member has a different natural frequency, so that vertical vibrations are caused by complexly coupled vibration modes. Therefore, as described in Patent Document 1, it is difficult to obtain a sufficient vibration control effect against vertical vibrations by simply attaching one auxiliary vibration system directly to a specific part of the architectural structure.

[0005] The present invention has been made against the background of the circumstances described above, and the problem to be solved by this invention is to provide a vibration control device unit of a novel structure that can efficiently exert a vibration control effect against vertical vibrations that are problematic in architectural structures, and to provide a vibration control device that is suitably used in such a vibration control device unit. [Means for solving the problem]

[0006] The following describes preferred embodiments for understanding the present invention, but the embodiments described below are merely illustrative and may be combined with one another as appropriate, and the multiple components described in each embodiment may be recognized and used independently as far as possible, and may also be combined with any of the components described in another embodiment as appropriate. As a result, the present invention is not limited to the embodiments described below, and various other embodiments may be realized.

[0007] The first aspect is a vibration control device unit that is attached to an architectural structure to reduce vertical vibration in the architectural structure, and has a support base that is fixedly attached to a structural material of the architectural structure as a primary vibration system. A plurality of mass members are elastically connected to the support base by connecting members each having a spring element and a damping element, thereby forming a plurality of secondary vibration systems. The plurality of secondary vibration systems form a TMD that has a plurality of natural frequencies in the vertical direction. On the other hand, the mass member is supported by a plurality of the connecting members, each of the plurality of connecting members being a composite structure in which a plurality of elastic materials of different materials are fixed to each other, each of the plurality of elastic materials constituting the connecting members has a length dimension in the vertical direction sufficient to connect the mass member to the support base, the mass member is directly and elastically supported on the support base by the plurality of elastic materials constituting the connecting members, the plurality of elastic materials constituting the connecting members are a metal coil spring and an elastomer, the elastomer is fixed to the spring wire of the metal coil spring so as to cover the entire surface of the spring wire, the pitch of the spring wire adjacent in the vertical direction in the metal coil spring is connected by the elastomer, and the metal coil spring has a structure in which the winding diameter at both ends in the coil axial direction is larger than the winding diameter at a central portion. It is something.

[0008] The vibration damping device unit constructed according to this embodiment has a plurality of sub-vibration systems with different natural frequencies, and therefore exerts an effective vibration damping effect on vertical vibrations over a wide frequency range as a whole. Therefore, it becomes possible to stably exert an effective vibration damping effect on vertical vibrations having complexly coupled vibration modes, for example.

[0009] Furthermore, since these multiple sub-vibration systems are integrated into a unit structure by the support base, it is possible to directly apply the vibration damping effect of the sub-vibration systems to a structural material with high resonant energy on the vibration transmission path, for example.

[0010] In addition, because the shape and size of the support base can be set with a large degree of freedom, it is also possible to set the installation space for the mass member, etc., in a location away from the structural material on which it is desired to exert the vibration damping effect of the secondary vibration system, thereby improving the degree of freedom in design. Furthermore, because the support base can support a plurality of secondary vibration systems while ensuring the stability of the support surface, it is possible to stably mount the vibration damping device unit on the target structural material in a horizontal state, regardless of the shape or structure of the mounting portion of the structural material. Furthermore, with the vibration damping device unit constructed according to this aspect, each mass member can be supported at a plurality of locations by the connecting members, thereby achieving stable support of the mass members by the connecting members. Furthermore, since the mass member is directly supported by a plurality of elastic materials of different materials, such as metal springs and rubber springs, the spring characteristics, damping characteristics, etc., of the secondary vibration system can be set with a large degree of freedom. In addition, with the vibration damping unit constructed according to this embodiment, the metal coil spring provides soft spring characteristics with excellent durability, while the elastomer provides vibration damping. Also, since the surface of the metal coil spring is covered with the elastomer, chatter vibrations that occur when the metal coil spring elastically deforms in a resonant state are suppressed by the damping action of the elastomer. In addition, a large bonding area is secured between the surface of the spring wire of the metal coil spring and the elastomer, improving the bonding strength between the spring wire and the elastomer. This prevents the elastomer from peeling off the metal coil spring, effectively causes the elastomer to deform in accordance with the metal coil spring, and effectively obtains the damping effect of the elastomer. By covering the surface of the metal coil spring with the elastomer, it is also expected that the durability of the metal coil spring will be improved by preventing rust. By disposing the elastomer so as to elastically connect adjacent spring wires in the spring axial direction of the metal coil spring, local buckling deformation of the elastomer is prevented when the metal coil spring is compressed and deformed, and since the elastomer has a high ability to follow deformation of the metal coil spring, the damping action of the elastomer can be efficiently exerted. In addition, since the mass member is directly supported by both the metal coil spring and the elastomer, the shared support load of the mass member acting on the elastomer is reduced, and changes in characteristics over time due to creep of the elastomer are mitigated. Moreover, with the vibration damping unit constructed according to this aspect, both ends in the coil axial direction, where the winding diameter is large, are overlapped with the mass member and the support base, so that when a compressive force acts on the metal coil spring, the metal coil spring is unlikely to tilt due to its high upright stability, and the mass member is stably supported by the metal coil spring, making it possible to suppress the occurrence of unnecessary vibrations of the mass member (such as horizontal vibrations and rotations). Also, because the elastomer secured to the metal coil spring has a small diameter compared to when the winding diameter is large over the entire metal coil spring, the spring constant of the connecting member can be set small to achieve soft spring characteristics.

[0020] No. two The embodiment is one In the vibration damping device unit described in the above aspect, mounting flange members having bolt fixing portions to either the mass member or the support base are provided at both vertical end portions of the connecting member, and the elastomer constituting the connecting member is fixed to the mounting flange members.

[0021] In the vibration damping device unit constructed according to this aspect, the mounting flange members provided at both vertical ends of the connecting member are bolted to either the mass member or the support base, so that both vertical ends of the connecting member can be stably attached to the mass member and the support base. Also, because an elastomer is fixed to the mounting flange members, the mounting flange members can be held in an appropriate position relative to the connecting member.

[0022] No. three The embodiment is two A vibration control device unit according to the above aspect, wherein in the mounting flange member provided on at least one end of the connecting member, the bolt fixing portion for the mass member or the support base is capable of adjusting its fixed position around an elastic central axis extending vertically in the connecting member.

[0023] According to the vibration damping device unit constructed according to this aspect, since the fixing positions of the bolt fixing parts relative to the mass member or the support base can be adjusted, the positional deviation of the bolt fixing parts relative to the mass member or the support base is permitted around the vertical elastic central axis of the connecting member, and the connecting member is prevented from being improperly attached to the mass member or the support base. Also, for example, in the case where the mounting flange members provided at both ends of the connecting member are misaligned relative to the mass member or the support base in the circumferential direction around the elastic central axis of the connecting member, if the mounting flange members are fixed to the mass member and the support base with torsional stress acting on the connecting member, this may affect the durability and spring characteristics of the connecting member, but since the fixing positions of the bolt fixing parts can be adjusted in the circumferential direction, it is possible to prevent unintended torsional stress from acting on the connecting member. The fourth aspect is a vibration control device unit that is attached to an architectural structure to reduce vertical vibrations in the architectural structure, and has a support base that is fixedly attached to a structural material of the architectural structure as a main vibration system, and a plurality of sub-vibration systems are formed by elastically connecting a plurality of mass members to the support base by connecting members each having a spring element and a damping element, and the plurality of sub-vibration systems form a TMD having a plurality of natural frequencies in the vertical direction, while the plurality of mass members have the same mass, and the spring characteristics of the connecting members that elastically support the mass members on the support base are different among the plurality of mass members, thereby forming the plurality of sub-vibration systems having mutually different natural frequencies in the vertical direction. The vibration damping device unit constructed according to this embodiment has a plurality of sub-vibration systems with different natural frequencies, and therefore exerts an effective vibration damping effect on vertical vibrations over a wide frequency range as a whole. Therefore, it becomes possible to stably exert an effective vibration damping effect on vertical vibrations having complexly coupled vibration modes, for example. Furthermore, since these multiple sub-vibration systems are integrated into a unit structure by the support base, it is possible to directly apply the vibration damping effect of the sub-vibration systems to a structural material with high resonant energy on the vibration transmission path, for example. In addition, because the shape and size of the support base can be set with a large degree of freedom, it is also possible to set the installation space for the mass member, etc., in a location away from the structural material on which it is desired to exert the vibration damping effect of the secondary vibration system, thereby improving the degree of freedom in design. Furthermore, because the support base can support a plurality of secondary vibration systems while ensuring the stability of the support surface, it is possible to stably mount the vibration damping device unit on the target structural material in a horizontal state, regardless of the shape or structure of the mounting portion of the structural material. Furthermore, according to the vibration control device unit constructed in accordance with this embodiment, for example, while adopting a common mass member, it is possible to configure a plurality of secondary vibration systems having mutually different natural frequencies in the vertical direction by using connecting members having different spring characteristics.

[0024] No. Five The embodiment is four In the vibration damping device unit according to the aspect of the present invention, each of the mass members is elastically connected to the support base by a plurality of the connecting members attached in parallel.

[0025] With a vibration damping device unit constructed according to this aspect, the support mode of the mass member is stabilized compared to when the mass member is elastically connected to the support base by only one connecting member, and unintended vibration of the mass member is prevented, for example, when vibration is input. Also, because the mass member is shared and supported by multiple connecting members, the support load input to each connecting member is reduced, and creep of the elastic material is reduced.

[0028] No. Six The embodiment is Fourth or fifth In the vibration control device unit described in the above aspect, the connecting members can be selected from a number of types prepared with different spring characteristics, and a number of connecting members with the same spring characteristics are attached to each of the mass members, so that each of the mass members is elastically supported by the support base with its mass evenly supported by the multiple connecting members.

[0029] According to the vibration damping device unit constructed in accordance with this embodiment, a vibration damping device can be selectively constructed according to the required characteristics by selecting a connecting member according to the required characteristics from among multiple types of connecting members prepared with different spring characteristics. Furthermore, since one mass member is supported by multiple connecting members, stable support of the mass member by the connecting members is realized. Furthermore, since the multiple connecting members supporting one mass member have the same spring characteristics, the support load of the mass member is distributed without being concentrated on a specific connecting member, thereby improving the durability of the connecting members and stabilizing the support of the mass member.

[0030] No. seven The first to fourth aspects are Six In the vibration control device unit described in any one of the above aspects, the vibration control device is provided with a lateral vibration limiting mechanism that allows vertical relative displacement of the mass member with respect to the support base and limits the amount of horizontal relative displacement of the mass member with respect to the support base.

[0031] With a vibration control device unit constructed in accordance with this embodiment, it is possible to effectively obtain the desired vibration control performance in the vertical direction, while unintended horizontal displacement of the mass member is suppressed by the lateral vibration limiting mechanism, thereby saving installation space by avoiding interference with the surrounding area of ​​the mass member, and improving the durability of the connecting members.

[0032] No. eight The embodiment of the present invention is as follows: In the vibration damping device unit according to any one of the first to seventh aspects, The connecting member is composed of a composite structure in which an elastomer is fixed to the spring wire of the metal coil spring so as to cover the entire surface of the spring wire, and the elastomer has a hollow structure with a central hole extending in the direction of the spring central axis of the metal coil spring.

[0033] A vibration damping device constructed according to the present invention. unit According to the present invention, a large bonding area between the surface of the spring wire of the metal coil spring and the elastomer is ensured, improving the bonding strength between the spring wire and the elastomer. This prevents the elastomer from peeling off the metal coil spring, effectively causes the elastomer to deform in accordance with the metal coil spring, and effectively obtains the damping effect of the elastomer.

[0034] By disposing the elastomer so as to elastically connect adjacent spring wires in the spring axial direction of the metal coil spring, local buckling deformation of the elastomer is prevented when the metal coil spring is compressed and deformed, and since the elastomer has a high ability to follow deformation of the metal coil spring, the damping action of the elastomer can be efficiently exerted. In addition, since the mass member is directly supported by both the metal coil spring and the elastomer, the shared support load of the mass member acting on the elastomer is reduced, and changes in characteristics over time due to creep of the elastomer are mitigated.

[0035] No. nine The embodiment is eight The vibration damping device according to the embodiment unitIn the metal coil spring, at least one of an inner circumferential surface and an outer circumferential surface of the elastomer is provided with a spiral unevenness extending in a winding direction of the spring wire of the metal coil spring.

[0036] A vibration damping device constructed according to the present invention. unit According to the invention, the unevenness increases the free surface area of ​​the elastomer and makes it possible to adjust the characteristics of the spring and damping. Moreover, since the unevenness is formed in a spiral shape extending in the winding direction of the spring wire of the metal coil spring, the unevenness is unlikely to affect the expansion and contraction deformation of the metal coil spring.

[0037] No. ten The embodiment is eight Or nine The vibration damping device according to the embodiment unit In the metal coil spring, the elastomer is provided with groove-shaped lightening portions that open onto an inner or outer circumferential surface between adjacent spring wires in the vertical direction of the metal coil spring.

[0038] A vibration damping device constructed according to the present invention. unit According to the document, by providing the elastomer between the pitches of the spring wires with the hollowed-out portions, the portions of the elastomer that are compressed between the spring wires when vibration is input in the vertical direction are reduced. Therefore, it is possible to prevent the spring constant of the connecting member from becoming large due to the compression spring of the elastomer, and it is possible to soften the spring characteristics of the connecting member. Effect of the Invention

[0040] According to the present invention, it is possible to provide a vibration damping device unit that can efficiently exert a vibration damping effect against vertical vibrations that are problematic in architectural structures, and a vibration damping device that is suitably used in such a vibration damping device unit. [Brief description of the drawings]

[0041] [Figure 1] FIG. 1 is a plan view showing a vibration damping device unit according to a first embodiment of the present invention; [Diagram 2]A front view of the vibration damping device unit shown in FIG. [Diagram 3] FIG. 5 is an enlarged longitudinal sectional view of a connecting member constituting the vibration damping device unit of FIG. 1, which corresponds to the III-III section of FIG. 4. [Figure 4] FIG. 4 is a plan view of the connecting member shown in FIG. [Diagram 5] FIG. 4 is a front view of a metal coil spring constituting the connecting member shown in FIG. [Figure 6] 1 is a front view and a longitudinal sectional view of a connecting member constituting a vibration damping device unit according to a second embodiment of the present invention; [Figure 7] FIG. 11 is a plan view of a connecting member that constitutes a vibration damping device unit according to a third embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0042] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0043] 1 and 2 show a vibration damping device unit 10 according to a first embodiment of the present invention. The vibration damping device unit 10 has a structure in which a plurality of vibration damping devices 14 are attached to a support base 12. In the following description, in principle, the up-down direction refers to the up-down direction in Fig. 2 which is the vertical up-down direction of the architectural structure A, the front-rear direction refers to the up-down direction in Fig. 1, and the left-right direction refers to the left-right direction in Fig. 1.

[0044] As shown in FIG. 1, the support base 12 has a structure in which four first beams 16, 16, 16, 16 extending in the front-rear direction are arranged between two second beams 18, 18 extending in the left-right direction. Both the first beams 16 and the second beams 18 extend linearly and are made of high-rigidity steel, and in this embodiment, they are H-shaped steel. The four first beams 16, 16, 16, 16 are arranged in parallel and spaced apart from each other in the left-right direction. The two second beams 18, 18 are arranged in parallel and spaced apart from each other in the front-rear direction. The support base 12 is formed by fixing both ends of each first beam 16 to one of the second beams 18, 18 by means of welding, bolt fixing, or the like.

[0045] The vibration damping device 14 damps the vibration of the architectural structure A in the vertical direction, and has a structure in which one mass member 20 is supported by a plurality of connecting members 22, as shown in Figs. 1 and 2. The mass member 20 is in the shape of a substantially rectangular block, and is preferably made of a material with a high specific gravity, such as iron. The length dimension of the mass member 20 in the left-right direction is greater than the distance between the adjacent first beam members 16, 16. The length dimension of the mass member 20 in the front-rear direction is smaller than half the distance between the two second beam members 18, 18. A screw hole (not shown) that opens on the bottom surface is formed in the square part of the mass member 20. Four screw holes are provided in each corner of the mass member 20, and are arranged at positions corresponding to each bolt hole 36 of the mounting flange member 34 described later. The mass of the mass member 20 is set in consideration of the mass of the architectural structure A to be damped, the frequency of the vibration to be damped, the spring constant in the vertical direction of the connecting member 22, and the like. In this embodiment, the entire mass member 20 is in the shape of a single block. However, for example, it is also possible to form the mass member 20 by stacking and fixing multiple metal plates to each other, and the mass of the mass member 20 can be adjusted by changing the number of metal plates that are stacked.

[0046] 3 and 4, the connecting member 22 is a composite structure having a structure in which an elastomer 26 as another elastic material is fixed to a metal coil spring 24 as an elastic material. The connecting member 22 has a spring element and a damping element, and the spring element is composed of the metal coil spring 24 and the elastomer 26, and the damping element is composed of the elastomer 26.

[0047] As shown in FIG. 5, the metal coil spring 24 has a structure in which a spring wire 28 made of spring steel extends in a spiral shape. In the metal coil spring 24, both axial end portions of the spring wire 28 are formed as large diameter portions 30 having a larger winding diameter than the axial center portion of the spring wire 28. In this embodiment, the large diameter portion 30 of the spring wire 28 is provided over approximately one circumference at the axial end portions of the metal coil spring 24. In the metal coil spring 24 of this embodiment, the cross-sectional shape of the spring wire 28 is approximately circular and is approximately constant in the length direction of the spring wire 28. However, the cross-sectional shape and cross-sectional area of ​​the spring wire 28 of the metal coil spring 24 may change in the length direction, and the cross-sectional shape is not limited to a circle. In addition, both end portions of the metal coil spring 24 may be ground, and the surface that overlaps with the mounting flange member 34 described later is made flat, thereby suppressing the inclination of the metal coil spring 24.

[0048] The elastomer 26 is fixed to the surface of the metal coil spring 24, and has a cylindrical hollow structure corresponding to the metal coil spring 24 as a whole, and has a central hole 31 penetrating in the vertical direction. The elastomer 26 is fixed so as to cover the entire surface of the spring wire 28 of the metal coil spring 24, and the metal coil spring 24 is disposed in an embedded state inside the elastomer 26. The elastomer 26 has a thicker portion covering the outer periphery side of the metal coil spring 24 than the portion covering the inner periphery side. The elastomer 26 is formed of, for example, rubber or resin elastomer, and has rubber-like elasticity. The elastomer 26 is desirably formed of a material that can obtain a large energy damping effect based on internal friction or the like by elastic deformation, and is formed of rubber in this embodiment. The elastomer 26 may be formed of, for example, a material having a large number of bubbles inside, such as foamed rubber.

[0049] Since the vertical intermediate portion of the metal coil spring 24 outside the large diameter portions 30, 30 has a smaller diameter than the large diameter portions 30, 30, the vertical intermediate portion of the elastomer 26 fixed to the metal coil spring 24 has a small diameter. As a result, the vertical spring constant of the elastomer 26 is smaller than when the entire vertical portion has a large diameter corresponding to the portion fixed to the large diameter portion 30, and it is possible to set the connecting member 22 to have low vertical spring characteristics.

[0050] The elastomer 26 has groove-shaped hollow portions 32 that open to the inner peripheral surface between the pitches of the spring wire 28 of the metal coil spring 24. The hollow portions 32 extend in a spiral shape along the winding direction of the spring wire 28 of the metal coil spring 24. The hollow portions 32 form the elastomer 26 such that the elastomer 26 is thin in the radial direction between the pitches of the spring wire 28, and the compression spring constant in the vertical direction, which is the axial direction, is reduced. The deepest portion of the hollow portions 32 is located on the outer periphery of the metal coil spring 24 relative to the axial central portion excluding the large diameter portion 30. In other words, the spaces between the spring wires 28 adjacent to each other in the coil axial direction of the metal coil spring 24 are not filled continuously with the elastomer 26 in the axial direction.

[0051] In this embodiment, the inner peripheral surface of the elastomer 26 is formed with a spirally extending unevenness by the hollowed-out portion 32, but instead of or in addition to such an unevenness on the inner peripheral surface, an unevenness extending in a spiral shape may be formed on the outer peripheral surface of the elastomer 26. In this embodiment, the outer peripheral surface of the elastomer 26 has slight unevenness and is convex toward the outer periphery between the pitches of the spring wires 28, but is generally cylindrical in shape as a whole. That is, in this embodiment, on both the inner peripheral surface and the outer peripheral surface of the elastomer 26, curved unevenness that is convex toward the outside is provided between the spring wires 28 adjacent to each other in the spring axial direction.

[0052] In this embodiment, the depth of the lightening portion 32 (the coil radial position of the deepest part) is approximately the same as the outer diameter of the winding of the metal coil spring 24. However, the depth of the lightening portion 32 is not limited and may be smaller than the inner diameter of the winding of the metal coil spring 24 or larger than the outer diameter of the winding, for example, but preferably the depth of the lightening portion 32 is larger than the inner diameter of the winding so as to carve out a space between adjacent windings in the coil axial direction. Note that, as will be described later, in the case where a lightening portion that opens on the outer peripheral surface of the elastomer 26 is employed, the depth of the lightening portion is similarly not limited, but is preferably smaller than the outer diameter of the winding so as to carve out a space between adjacent windings in the coil axial direction.

[0053] In the metal coil spring 24, the pitches of the spring wires 28 adjacent to each other in the vertical direction are connected by the elastomer 26. In this embodiment, the hollowed-out portions 32 are formed, so that the pitches of the spring wires 28 are connected by the elastomer 26 on the outer circumferential side of the spring wires 28.

[0054] Mounting flange members 34a, 34b are fixed to both axial ends of the elastomer 26. The mounting flange member 34 is in the form of a generally rectangular plate with rounded corners, and is generally square in shape with each side longer than the winding diameter of the large diameter portion 30 of the metal coil spring 24 when viewed in the vertical direction.

[0055] The mounting flange member 34 has a square portion formed with bolt holes 36 that penetrate in the vertical direction and serve as bolt fixing portions. In this embodiment, the bolt holes 36 are circular holes. The four bolt holes 36, 36, 36, 36 are located on an imaginary circle that is concentric with the metal coil spring 24 and are spaced the same distance from the central axis of the metal coil spring 24. The four bolt holes 36, 36, 36, 36 are located on diagonals of the mounting flange member 34, and the intersection of the diagonals of the mounting flange member 34 is located on the central axis of the metal coil spring 24.

[0056] A circular through hole 38 that penetrates in the vertical direction is formed in the center of the mounting flange member 34. The through hole 38a of one mounting flange member 34a has a larger diameter than the through hole 38b of the other mounting flange member 34b, and a ring-shaped metal fitting 40 that is separate from the mounting flange member 34a is press-fitted and fixed into the through hole 38a.

[0057] The elastomer 26, in which the metal coil spring 24 is disposed, has both axial ends fixed to the mounting flange members 34a, 34b. The elastomer 26 is vulcanization bonded to the mounting flange members 34a, 34b at the outer periphery of the through holes 38a, 38b. The axial ends of the elastomer 26, which is fixed to the large diameter portion 30 of the metal coil spring 24 and has a large diameter, are fixed to the mounting flange members 34, thereby improving the fixing strength. The bolt holes 36 provided in each square portion of the mounting flange members 34a, 34b are all located on the outer periphery of the elastomer 26 and are exposed without being covered by the elastomer 26.

[0058] The metal coil spring 24 and the mounting flange members 34a, 34b may be overlapped in a state of direct contact, but overlapping them via the elastomer 26 makes it easier to prevent rattling and the like. In particular, since the large diameter portion 30 of the metal coil spring 24 is overlapped on the mounting flange member 34 via the elastomer 26, unintended tilting of the metal coil spring 24 is unlikely to occur. The elastomer 26 interposed between the overlapping surfaces of the metal coil spring 24 and the mounting flange member 34 is sufficiently thin, and the vertical length of the metal coil spring 24 is approximately the same as the vertical length of the elastomer 26. The vertical length of the metal coil spring 24 and the elastomer 26 are both large enough to connect the mounting flange members 34a, 34b to each other in the vertical direction. Furthermore, because the elastomer 26 interposed between the overlapping surfaces of the metal coil spring 24 and the mounting flange member 34 is made sufficiently thin, there is almost no effect on the spring and damping characteristics of the elastomer 26 between the overlapping surfaces, and the characteristics are approximately the same as if the metal coil spring 24 and the mounting flange member 34 were directly overlapped, so the metal coil spring 24 and the mounting flange member 34 can be considered to be directly connected.

[0059] An inner mold (not shown) for molding the inner peripheral surface of the elastomer 26 is removed through the through hole 38a of the mounting flange member 34a after vulcanization molding of the elastomer 26. Then, after the inner mold is removed, a ring-shaped metal fitting 40 is fixed in the through hole 38a. Therefore, the inner peripheral edge of the mounting flange member 34a (the opening peripheral edge of the through hole 38a) is located on the outer periphery of the deepest part (the outermost end) of the hollowed-out portion 32 in the elastomer 26.

[0060] The connecting member 22 is attached to the mass member 20 as shown in Figures 1 and 2. That is, the upper end of the connecting member 22 is fixed to the mass member 20 by inserting a bolt 42 through a bolt hole 36 of the mounting flange member 34b and screwing it into a screw hole (not shown) that opens in the underside of the mass member 20. Four connecting members 22, 22, 22, 22 are attached in parallel to a square portion of one mass member 20. In this way, a vibration damping device 14 is formed in which the square portion of the mass member 20 is elastically supported by the four connecting members 22, 22, 22, 22.

[0061] Preferably, the four connecting members 22, 22, 22, 22 constituting one vibration damping device 14 have the same spring characteristics. Moreover, it is desirable that the four connecting members 22, 22, 22, 22 are common members having the same shape, size, structure, material, etc. As a result, the mass of the mass member 20 is evenly supported by the four connecting members 22, 22, 22, 22. Therefore, it is possible to prevent problems such as the support load of the mass member 20 being concentrated on a specific connecting member 22, or the mass member 20 swinging in an unintended manner when vibration is input. For example, a connecting member 22 with a required spring characteristic may be selected from a plurality of types of connecting members 22 with different spring characteristics prepared in advance, and the selected four connecting members 22, 22, 22, 22 with the same spring characteristic may be attached to one mass member 20.

[0062] The vibration damping device 14 constitutes a secondary vibration system by being attached to the support base 12. That is, the bolts 44 inserted into the bolt holes 36 of the mounting flange member 34a are inserted into bolt holes (not shown) of the support base 12 and screwed into nuts (not shown), so that the lower ends of the connecting members 22 constituting the vibration damping device 14 are fixed to the support base 12. Of the four connecting members 22, 22, 22, 22 attached to the mass member 20, two are attached to each of the first beam members 16, 16, and the other two are attached to the second beam member 18. The mass member 20 is directly and elastically supported by both the metal coil springs 24 and the elastomer 26 constituting the connecting member 22 with respect to the support base 12. In short, the metal coil springs 24 and the elastomer 26 in the connecting member 22 are arranged in parallel in the vertical direction, which is the support direction of the mass member 20, and each connects the mass member 20 to the support base 12.

[0063] In this embodiment, four vibration damping devices 14, 14, 14, 14 are attached to the support base 12 at a distance from each other in the front-rear and left-right directions. This forms a vibration damping device unit 10 as a Tuned Mass Damper (TMD) equipped with four sub-vibration systems. By attaching the four vibration damping devices 14, 14, 14, 14 to the support base 12, it is possible to reduce the mass of the mass member 20 of each vibration damping device 14 while ensuring a sufficient mass for the entire vibration damping device unit 10. This makes it easy to attach the vibration damping devices 14 to the support base 12, and also makes it easy to manufacture, store, and transport the vibration damping devices 14.

[0064] The vibration damping device unit 10 constructed as described above is attached to the architectural structure A by fixedly attaching the support base 12 to a structural material a, such as a floor structural material, that constitutes the architectural structure A, which is the main vibration system, as shown in Fig. 2. The method of attaching the support base 12 to the structural material a is not particularly limited, but for example, the support base 12 is attached to the structural material a by bolting or welding.

[0065] Since multiple vibration-damping devices 14 are integrated into a unit structure by the support base 12, by connecting the support base 12 to structural material a whose vibrations increase due to resonance, for example, it is possible to directly apply the vibration-damping effect of the vibration-damping device 14 to the structural material a.

[0066] Also, by appropriately setting the shape and size of the support base 12, it is possible to set the installation space for the mass member 20 etc. at a position away from the structural material a that is the target of vibration damping, thereby improving the degree of freedom in design. Furthermore, since the support base 12 stably supports multiple vibration damping devices 14, the vibration damping devices 14 can be stably attached to the structural material a in a horizontal state, regardless of the shape and structure of the attachment portion of the vibration damping device unit 10 on the structural material a.

[0067] When vertical vibrations are applied to the structural material a to which the vibration damping device unit 10 is attached, the vertical vibrations input from the structural material a to the support base 12 are transmitted to the mass member 20 via the connecting member 22, causing the mass member 20 to be displaced in the vertical direction. The kinetic energy of the mass member 20 converted from the vibration energy of the vibration to be damped is absorbed by the energy damping action of the elastomer 26 that constitutes the connecting member 22. In this way, the dynamic vibration absorbing action of the secondary vibration system (vibration damping device 14) that constitutes the vibration damping device unit 10 reduces the vertical (up-down) vibrations of the structural material a, which is the target of vibration damping, and ultimately of the architectural structure A.

[0068] Each vibration damping device 14 exerts an excellent vibration damping effect by the dynamic vibration absorption action described above, since the mass member 20 is actively displaced in a resonant state when vibration of a tuning frequency preset by the mass of the mass member 20 and the spring constant of the connecting member 22 is input. On the other hand, for input vibration of a frequency outside the tuning frequency, the displacement of the mass member 20 becomes small, and an effective vibration damping effect may not be exerted. Therefore, the four vibration damping devices 14, 14, 14, 14 constituting the vibration damping device unit 10 have different natural frequencies (resonance frequencies of the mass-spring system) in the vertical direction. As a result, the four vibration damping devices 14, 14, 14, 14 exert a vibration damping effect against a plurality of types of vibration with different frequencies, and the vibration damping device unit 10 as a TMD having vibration damping performance against input vibration in a wider frequency range is realized.

[0069] As a means for making the natural frequencies of the four vibration damping devices 14, 14, 14, 14 different from one another, the masses of the mass members 20 of each vibration damping device 14 may be made different from one another, but it is preferable to make the spring characteristics of the connecting members 22 of each vibration damping device 14 different from one another. This makes it possible to obtain a plurality of types of vibration damping devices 14 having different natural frequencies from one another while using a common large-sized and high-mass mass member 20. In this embodiment, the masses of the four mass members 20, 20, 20, 20 are made the same, and the spring characteristics in the vertical direction of the connecting members 22 of each vibration damping device 14 are different from one another, so that the four vibration damping devices 14, 14, 14, 14 are set to have different natural frequencies in the vertical direction. The natural frequency of each vibration damping device 14 is set appropriately depending on the vibration state of the architectural structure A to be damped (e.g., the frequency of the vibration to be damped), but is set, for example, so as to provide an effective vibration damping effect against vibrations of 3 to 30 Hz, which are likely to cause problems in the architectural structure A.

[0070] In addition, when the natural frequencies of the four vibration damping devices 14, 14, 14, 14 are made different, it is not necessary that all of the natural frequencies of the four vibration damping devices 14, 14, 14, 14 are different. For example, two of the four vibration damping devices 14, 14, 14, 14 may be tuned to the same natural frequency, and the natural frequencies of two of the vibration damping devices 14, 14 may be different from each other.

[0071] The connecting member 22 of the vibration damping device 14 has a structure in which an elastomer 26 is fixed to the entire surface of a metal coil spring 24, and is a novel structure that integrally comprises a spring element and a damping element, which was not found in conventional vibration damping devices for architectural structures. Such a connecting member 22 simplifies the structure and allows installation in a smaller installation space compared to conventional vibration damping devices in which a spring element and a damping element (damper) are provided separately. In addition, by adjusting the resonance frequency of the mass-spring system (secondary vibration system) in which the connecting member 22 acts as a spring according to the natural frequency of the architectural structure A, which is the primary vibration system, the secondary vibration system can efficiently reduce vibration in the resonance frequency range of the primary vibration system. Since the connecting member 22 is a composite structure having the metal coil spring 24 and the elastomer 26 in parallel (rather than in series) between the main vibration system and the secondary vibration system, the resonant frequency of the secondary vibration system can be adjusted not only by the spring characteristics of the metal coil spring 24 but also by the spring characteristics of the elastomer 26, making it possible to obtain a large degree of freedom in tuning the resonant frequency.

[0072] The elastomer 26 fixed to the entire surface of the metal coil spring 24 deforms in response to the upward and downward expansion and contraction deformation of the metal coil spring 24 and is less likely to undergo buckling-like deformation, so that the desired damping, springiness, and other characteristics can be obtained efficiently and stably.

[0073] In addition, since the load input from the mass member 20 to the connecting member 22 is shared and supported by the metal coil spring 24 and the elastomer 26, the load input to the elastomer 26 is reduced, thereby preventing changes in the characteristics of the elastomer 26 due to creep and preventing damage due to excessive deformation of the elastomer 26.

[0074] In addition, since the elastomer 26 is adhered to the entire surface of the metal coil spring 24, the adhesion area of ​​the elastomer 26 to the metal coil spring 24 is increased, improving the adhesion strength and preventing the elastomer 26 from peeling off from the metal coil spring 24.

[0075] Furthermore, since the elastomer 26 is fixed to the entire surface of the metal coil spring 24, it is expected that low spring characteristics will be achieved and creep will be further reduced. That is, since the metal coil spring 24 is torsionally deformed around the central axis of the spring wire 28 when it is elastically deformed in the spring axial direction, the elastomer 26 fixed to the surface of the metal coil spring 24 is also elastically deformed to twist along the surface of the spring wire 28. Since this elastic deformation is accompanied by shear deformation, it is expected that the damping component will be increased while avoiding a significant increase in spring hardness, as compared to an elastomer that is simply compressed and deformed in the opposing direction between the support base 12 of the vibration damping device unit 10 and the structural material a of the architectural structure A, for example. In particular, because the elastomer 26 is fixed so as to cover the entire surface of the metal coil spring 24, the torsional deformation of the spring wire 28 is more likely to be efficiently applied to the elastomer 26 as elastic deformation including a shear component, compared to, for example, a case in which the elastomer is fixed only to a portion of the surface of the metal coil spring 24. Furthermore, by providing the elastomer 26 with the lightening portions 32 and by providing a curved uneven shape on the outer periphery between the pitches of the metal coil spring 24 as in this embodiment, it is possible to stabilize the curved shape during compressive deformation in the spring axial direction, as well as to efficiently express a deformation mode including a shear component, and thus to further improve the compatibility of low springiness and high damping in the elastomer 26.

[0076] FIG. 6 shows a connecting member 50 of a vibration damping device constituting a vibration damping device unit according to a second embodiment of the present invention. The connecting member 50 has a structure in which an elastomer 54 as another elastic material is fixed to a metal coil spring 52 as an elastic material. In the following description, the same members and parts as those of the first embodiment are given the same reference numerals in the drawings and will not be described. The connecting member 50 shown in FIG. 6 is shown in a front view on the right side and a vertical cross-sectional view on the left side with respect to the center of the left and right indicated by a dashed line in the drawing. The connecting member 50 of this embodiment, like the connecting member 22 of the first embodiment, elastically connects a mass member (not shown) to a support base to constitute a vibration damping device.

[0077] The metal coil spring 52 has a smaller difference between the vertical length and the outer diameter than the metal coil spring 24 of the first embodiment. Also, the metal coil spring 52 has a smaller number of turns of the spring wire 28 than the metal coil spring 24 of the first embodiment.

[0078] The elastomer 54 has a generally cylindrical hollow structure and is fixed to the entire surface of the spring wire 28 constituting the metal coil spring 52. The inner peripheral surface of the elastomer 54 has corrugated irregularities. The outer peripheral surface of the upper and lower middle parts of the elastomer 54 has irregularities corresponding to the inner peripheral surface. As a result, the cross-sectional center line L extending in the vertical direction of the elastomer 54 is corrugated in such a way that it is convex toward the outer periphery between the pitches of the spring wires 28 adjacent in the vertical direction and is convex toward the inner periphery at the fixed part of the spring wires 28. The intermediate part of the spring wire 28 of the metal coil spring 52, excluding the large diameter part 30 where the winding diameter is large, is fixed inside the elastomer 54 between the convex part of the inner peripheral surface and the concave part of the outer peripheral surface of the elastomer 54 in the radial direction. In other words, the convex portion of the inner peripheral surface of the elastomer 54 is located on the inner circumference of the spring wire 28 of the metal coil spring 52, and the concave portion of the outer peripheral surface of the elastomer 54 is located on the outer circumference of the spring wire 28. The concaves and convexes on the inner and outer peripheral surfaces of the elastomer 54 extend in a spiral shape along the spring wire 28 of the metal coil spring 52. The elastomer 54 is disposed at a position that overlaps with the spring wire 28 (excluding the large diameter portion 30) when projected in the vertical direction, and when the metal coil spring 52 is compressed, a portion of the elastomer 54 is directly compressed in the axial direction between the spring wires 28 adjacent in the vertical direction.

[0079] In the connecting member 50 of this embodiment, the inner and outer circumferential surfaces of the elastomer 54 are provided with projections and recesses, and the spring wires 28 of the metal coil spring 52 are fixed radially between the projections on the inner circumferential surface and the recesses on the outer circumferential surface of the elastomer 54. Therefore, in the elastomer 54, the portions located between the pitches of the spring wires 28 adjacent to each other in the coil axis direction are curved so that the cross-sectional center line L is convex toward the outer periphery. Therefore, for example, when the metal coil spring 52 contracts in the vertical direction and the pitches of the adjacent spring wires 28 become smaller, the elastomer 54 located between the pitches of the adjacent spring wires 28 is easily deformed so as to bulge toward the outer periphery, thereby reducing the compression spring component in the vertical direction. The elastomer 54 has a roughly cylindrical shape overall, but in the portion fixed to the spring wire 28 of the metal coil spring 52, the metal coil spring 52 suppresses radial expansion deformation even when the connecting member 50 is compressed and deformed, and the portion located between adjacent spring wires 28 in the axial direction (between the pitch) elastically deforms so as to bulge outward, thereby reducing compressive deformation and increasing shear deformation, and also making it possible to avoid local buckling-like deformation.

[0080] 7 shows a connecting member 60 of a vibration damping device constituting a vibration damping device unit according to a third embodiment of the present invention. The connecting member 60 has a structure in which mounting flange members 62 are fixed to both upper and lower ends of the elastomer 26, respectively.

[0081] The mounting flange member 62 is in the form of a substantially rectangular plate, and each of the four corners is formed with a bolt hole 64 as a bolt fixing portion. In this embodiment, the bolt hole 64 penetrates the mounting flange member 62 in the vertical direction and is an elongated hole extending in the circumferential direction of the elastomer 26. As a result, when the mounting flange member 62 is bolted to a mass member or support base (not shown), the relative position of the bolt hole 64 with respect to the mass member or support base, i.e., the orientation of the vibration damping device, can be adjusted in the circumferential direction around the elastic central axis of the elastomer 26 extending in the vertical direction.

[0082] In this way, the mounting orientation of the mounting flange member 62 relative to the support base can be adjusted in the circumferential direction, thereby preventing torsional stress from acting on the elastomer 26 due to an error in the circumferential orientation of the upper and lower mounting flange members 62, 62. As a result, for example, when molding the elastomer 26 with the metal coil spring 24 and the mounting flange members 62, 62 set in the molding cavity of the elastomer 26, even if the upper and lower mounting flange members 62, 62 are relatively misaligned around the central axis due to molding shrinkage of the elastomer 26, it becomes possible to fix the upper and lower mounting flange members 62, 62 with bolts to either the mass member of the vibration damping unit or the support base, respectively, while avoiding the occurrence of initial stress in the metal coil spring 24 and the elastomer 26.

[0083] When a circular bolt hole 36 is used as the bolt fixing portion, as in the mounting flange member 34 of the vibration damping device 14 of the first embodiment, the bolt hole formed in the mass member 20 or the support base 12 can be made into an elongated hole, for example, to make it possible to adjust the orientation and mounting position of the vibration damping device 14.

[0084] Although the embodiment of the present invention has been described above in detail, the present invention is not limited by the specific description. For example, in the above embodiment, the mass members 20 are common to each other, but the mass, shape, size, specific gravity (material), etc. of the mass members can be made different from each other. When the masses of the mass members are made different from each other, even if the spring constants of the connecting members supporting the mass members are the same, it is possible to configure a vibration damping device with different natural frequencies. Note that the mass members are preferably made of metal with a high specific gravity in order to ensure the necessary mass while preventing excessive size, but are not limited to metal.

[0085] The multiple elastic materials constituting the connecting member 22 are not necessarily limited to the metal coil spring 24 and the elastomer 26. The connecting member may also be constituted by a combination of three or more different elastic materials. For example, in one embodiment, a metal coil spring not including an elastomer may be added to the above embodiment at a different position independent of the connecting member 22, or may be added and disposed in a housed state inside the hollow of the connecting member 22.

[0086] In the first embodiment, the recessed portions 32 opening to the inner circumferential surface are formed in the elastomer 26 between the pitches of the spring wire 28 of the metal coil spring 24. However, for example, the recessed portions may be formed to open to the outer circumferential surface of the elastomer 26 between the pitches of the spring wire 28. By adopting the recessed portions opening to the outer circumferential surface of the elastomer, the inner circumferential surface of the elastomer is made to be a substantially straight cylindrical surface extending with a substantially constant inner diameter dimension, which makes it possible to facilitate demolding during molding. In addition, the recessed portions opening to the inner circumferential surface of the elastomer 26 and the recessed portions opening to the outer circumferential surface of the elastomer 26 may be provided between the pitches of the spring wire 28. In this case, the recessed portions opening to the inner circumferential surface of the elastomer 26 and the recessed portions opening to the outer circumferential surface of the elastomer 26 may be provided at the same pitch or different pitches in the vertical direction. The recessed portions are not essential and may be omitted. In addition, the hollowed-out portion does not necessarily have to extend spirally between the pitches of the spring wire 28, and may be provided, for example, intermittently in the winding direction of the spring wire 28, or may be provided in a spot manner at multiple locations.

[0087] In the second embodiment, an example in which the elastomer 26 has both the inner and outer peripheral surfaces with irregularities is shown, but the irregularities may be provided only on either the inner or outer peripheral surface of the elastomer 26. In addition, it is not necessary to provide both the irregularities and the protrusions, and only one of the irregularities and the protrusions may be provided. For example, the irregularities or protrusions may be provided on both the inner and outer peripheral surfaces. By providing the irregularities in the axial direction on the inner and / or outer peripheral surfaces of the elastomer 26, it is possible to regulate the deformation state of the elastomer 26 during compression deformation and to actively cause the elastomer 26 to be curved, and it is expected that the buckling deformation due to compression deformation can be suppressed. For this purpose, it is preferable that one irregularity is formed on the inner or outer peripheral surface so as to straddle the spring wires 28 of the metal coil springs 52 adjacent in the axial direction. However, for example, a plurality of irregularities may be formed in a continuous manner on the inner or outer peripheral surface between the spring wires 28 of the metal coil springs 52 adjacent in the axial direction.

[0088] The number of vibration dampers 14 constituting the vibration damper unit 10 is not particularly limited as long as it is more than one, and may be two, three, or five or more. In addition, the number of connecting members 22 supporting one mass member 20 in the vibration damper 14 is merely an example, and may be three or less, or may be five or more. However, in order to stabilize the support of the mass member 20, it is desirable that one mass member 20 is supported by three or more connecting members 22. The mass of one mass member should be set in consideration of the number of masses, the architectural structure, the target vibration, the connecting members, etc., and is not to be interpreted restrictively. For example, in the case of four mass members as in the embodiment, it can be set to about 100 kg or more (or less).

[0089] The specific structure of the support base 12 is not limited to the above embodiment. In particular, the arrangement of the first beam and the second beam may be appropriately changed depending on the number and arrangement of the connecting members 22 in the vibration damping device 14. In addition, the support base 12 in the above embodiment is made lighter by being composed of the first beam and the second beam, but the support base is not limited to a structure combining a plurality of beams, and may be, for example, plate-shaped, etc., as long as it can support a plurality of vibration damping devices 14 and can be attached to the architectural structure A. Note that the beams 16, 18 constituting the support base 12 in the above embodiment are not limited to H-shaped steel, and steel materials of other shapes, such as box steel, may also be used.

[0090] For example, a lateral vibration limiting mechanism may be provided that allows vertical displacement of the mass member 20 relative to the support base 12 and limits the amount of horizontal displacement of the mass member 20 relative to the support base 12. The specific structure of the lateral vibration limiting mechanism is not limited as long as it allows vertical movement of the mass member 20 while limiting horizontal movement. For example, a rod-shaped member protruding from the mass member 20 toward the support base 12 is provided and inserted into a through-hole that penetrates the support base 12, and the amount of horizontal displacement of the mass member 20 is limited by engagement between the rod-shaped member and the inner circumferential surface of the through-hole.

[0091] Furthermore, by disposing an elastic body between the opposing rod-shaped member and the inner circumferential surface of the insertion hole to form a bush, it is possible to obtain spring or damping properties by the elastic body against, for example, minute horizontal input. Also, by disposing a bearing or sliding material that allows relative displacement between the rod-shaped member and the support base 12 in the up-down direction but does not allow relative displacement in the horizontal direction between the opposing rod-shaped member and the inner circumferential surface of the insertion hole, it is possible to prevent horizontal displacement of the mass member 20. It is also possible to provide a vertical stopper mechanism that limits excessive vertical displacement of the mass member 20.

[0092] In order to achieve low spring characteristics and stability during input, the metal coil spring 24 desirably has large diameter portions 30 with a large winding diameter at both ends in the coil axis direction, but may have a substantially constant winding diameter over the entire length. Desirably, both ends of the metal coil spring 24 are overlapped on the mounting flange member 34 via the elastomer 26, but may be directly overlapped on the mounting flange member 34 and fixed by welding or other means. The specific structure of the metal coil spring 24 is not limited, and for example, an unequal pitch coil spring or the like can be used, and various end shapes such as closed ends, open ends, and tangent tail ends can be selectively used, and hooks or bends can be provided on the ends to be used for fixing to the mounting flange member.

[0093] The bolt fixing portions of the mounting flange member 34 are not limited to bolt holes, but may be formed by bolts implanted in the mounting flange member 34, for example. Furthermore, the present invention essentially includes each of the inventions described in (i) to (xiii) below, and the configurations and effects thereof will be described below. The present invention relates to (i) A vibration damping device unit that is attached to an architectural structure to reduce vertical vibrations in the architectural structure, the vibration damping device unit having a support base that is fixedly attached to a structural material of the architectural structure as a primary vibration system, and a plurality of secondary vibration systems that are formed by elastically connecting a plurality of mass members to the support base by connecting members each having a spring element and a damping element, the plurality of secondary vibration systems forming a TMD that has a plurality of natural frequencies in the vertical direction; (ii) A vibration damping device unit according to (i), in which the mass member is supported by a plurality of the connecting members, each of the connecting members being a composite structure in which a plurality of elastic members made of different materials are fixed to each other, each of the plurality of elastic members constituting the connecting members having a length dimension in the vertical direction sufficient to connect the mass member to the support base, and the mass member being directly and elastically supported on the support base by the plurality of elastic members constituting the connecting members. (iii) A vibration damping device unit according to (ii), in which the multiple elastic members constituting the connecting member are a metal coil spring and an elastomer, the elastomer is fixed to the spring wire of the metal coil spring so as to cover the entire surface of the spring wire, and the pitches of the spring wires adjacent to each other in the vertical direction in the metal coil spring are connected by the elastomer. (iv) The vibration damping device unit according to (iii), wherein the metal coil spring has a larger winding diameter at both ends in the coil axial direction than at a central portion. (v) A vibration damping device unit according to (iii) or (iv), in which mounting flange members having bolt fixing portions for either the mass member or the support base are provided at both vertical end portions of the connecting member, and the elastomer constituting the connecting member is fixed to the mounting flange members. (vi) The vibration damping device unit according to (v), wherein the bolt fixing portion for fixing to the mass member or the support base in the mounting flange member provided on at least one end of the connecting member is adjustable in a fixed position around an elastic central axis extending vertically in the connecting member. (vii) The vibration damping device unit according to any one of (i) to (vi), wherein each of the mass members is elastically connected to the support base by a plurality of the connecting members attached in parallel. (viii) The vibration damping device unit according to any one of (i) to (vii), wherein the plurality of mass members are of the same mass, and the spring characteristics of the connecting members that elastically support the mass members on the support base are made different between the plurality of mass members, thereby forming the plurality of sub-vibration systems having mutually different natural frequencies in the vertical direction. (ix) The vibration damping device unit according to (viii), wherein the connecting members can be selected from a plurality of types prepared with different spring characteristics, and a plurality of the connecting members having the same spring characteristics are attached to each of the mass members, so that each of the mass members is elastically supported by the support base with its mass evenly supported by the plurality of the connecting members. (x) a vibration damping device unit according to any one of (i) to (ix), comprising a lateral vibration limiting mechanism that allows a relative displacement of the mass member with respect to the support base in a vertical direction and limits a relative displacement amount of the mass member with respect to the support base in a horizontal direction; (xi) A vibration control device for vertical vibration in an architectural structure, in which a connecting member for elastically supporting a mass member is formed of a composite structure in which an elastomer is fixed to a spring wire of a metal coil spring so as to cover the entire surface of the spring wire, and the elastomer has a hollow structure having a central hole extending in the direction of the central axis of the metal coil spring. (xii) The vibration damping device according to (xi), wherein the elastomer has a spiral unevenness on at least one of an inner circumferential surface and an outer circumferential surface, the spiral unevenness extending in a winding direction of the spring wire of the metal coil spring. (xiii) A vibration damping device according to (xi) or (xii), wherein the elastomer is provided with groove-shaped lightening portions that open onto an inner circumferential surface or an outer circumferential surface between adjacent spring wires in the vertical direction of the metal coil spring. This includes inventions relating to. In the invention described in (i) above, since a plurality of auxiliary vibration systems with different natural frequencies are provided, an effective vibration damping action is exerted against vertical vibrations over a wide frequency range as a whole, and therefore, it becomes possible to stably exert an effective vibration damping action against, for example, vertical vibrations having complexly coupled vibration modes. Furthermore, since these multiple sub-vibration systems are integrated into a unit structure by the support base, it is possible to directly apply the vibration damping effect of the sub-vibration systems to a structural material with high resonant energy on the vibration transmission path, for example. In addition, because the shape and size of the support base can be set with a large degree of freedom, it is also possible to set the installation space for the mass member, etc., in a location away from the structural material on which it is desired to exert the vibration damping effect of the secondary vibration system, thereby improving the degree of freedom in design. Furthermore, because the support base can support a plurality of secondary vibration systems while ensuring the stability of the support surface, it is possible to stably mount the vibration damping device unit on the target structural material in a horizontal state, regardless of the shape or structure of the mounting portion of the structural material. In the invention described in (ii) above, each mass member can be supported at a plurality of locations by the connecting members, and stable support of the mass members by the connecting members can be achieved. Furthermore, since the mass member is directly supported by a plurality of elastic materials of different materials, such as metal springs and rubber springs, the spring characteristics, damping characteristics, etc., of the secondary vibration system can be set with a large degree of freedom. In the invention described in (iii) above, the metal coil spring can provide soft spring characteristics with excellent durability, while the elastomer can provide a vibration damping effect. Furthermore, by covering the surface of the metal coil spring with the elastomer, chatter vibrations that occur when the metal coil spring elastically deforms in a resonant state can be suppressed by the damping effect of the elastomer. In addition, a large bonding area is secured between the surface of the spring wire of the metal coil spring and the elastomer, improving the bonding strength between the spring wire and the elastomer. This prevents the elastomer from peeling off the metal coil spring, effectively causes the elastomer to deform in accordance with the metal coil spring, and effectively obtains the damping effect of the elastomer. By covering the surface of the metal coil spring with the elastomer, it is also expected that the durability of the metal coil spring will be improved by preventing rust. By disposing the elastomer so as to elastically connect adjacent spring wires in the spring axial direction of the metal coil spring, local buckling deformation of the elastomer is prevented when the metal coil spring is compressed and deformed, and since the elastomer has a high ability to follow deformation of the metal coil spring, the damping action of the elastomer can be efficiently exerted. In addition, since the mass member is directly supported by both the metal coil spring and the elastomer, the shared support load of the mass member acting on the elastomer is reduced, and changes in characteristics over time due to creep of the elastomer are mitigated. In the invention described in (iv) above, by overlapping both ends in the coil axial direction, where the winding diameter is large, on the mass member and the support base, when a compressive force acts on the metal coil spring, the metal coil spring is unlikely to tilt due to its high upright stability, and the mass member is stably supported by the metal coil spring, so that it is possible to suppress the occurrence of unnecessary vibrations of the mass member (such as horizontal vibrations and rotations). Also, because the elastomer secured to the metal coil spring has a small diameter compared to when the winding diameter is large over the entire metal coil spring, the spring constant of the connecting member can be set small to achieve soft spring characteristics. In the invention described in (v) above, the mounting flange members provided at both vertical ends of the connecting member are bolted to either the mass member or the support base, so that both vertical ends of the connecting member can be stably attached to the mass member and the support base. Also, because an elastomer is fixed to the mounting flange members, the mounting flange members can be held in an appropriate position relative to the connecting member. In the invention described in (vi) above, since the fixing position of the bolt fixing part relative to the mass member or the support base can be adjusted, misalignment of the bolt fixing part relative to the mass member or the support base is permitted around the vertical elastic central axis of the connecting member, preventing improper attachment of the connecting member to the mass member or the support base. Also, for example, if the mounting flange members provided at both ends of the connecting member are misaligned relative to the mass member or the support base in the circumferential direction around the elastic central axis of the connecting member, and the mounting flange members are fixed to the mass member and the support base with torsional stress acting on the connecting member, this may affect the durability and spring characteristics of the connecting member. However, since the fixing position of the bolt fixing part can be adjusted in the circumferential direction, it is possible to prevent unintended torsional stress from acting on the connecting member. In the invention described in (vii) above, the support state of the mass member is stabilized compared to when the mass member is elastically connected to the support base by only one connecting member, and unintended vibration of the mass member is prevented, for example, when vibration is input. Also, since the mass member is supported by multiple connecting members, the support load input to each connecting member is reduced, and creep of the elastic material is reduced. In the invention described in (viii) above, for example, while a common mass member is employed, a plurality of sub-vibration systems having mutually different natural frequencies in the vertical direction can be formed by using connecting members having different spring characteristics. In the invention described in (ix) above, a vibration damping device according to the required characteristics can be selectively configured by selecting a connecting member according to the required characteristics from among multiple types of connecting members prepared with different spring characteristics. In addition, since one mass member is supported by multiple connecting members, stable support of the mass member by the connecting members is realized. In addition, since the multiple connecting members supporting one mass member have the same spring characteristics, the support load of the mass member is distributed without being concentrated on a specific connecting member, thereby improving the durability of the connecting members and stabilizing support of the mass member. In the invention described in (x) above, while effectively obtaining the desired vibration control performance in the vertical direction, unintended horizontal displacement of the mass member is suppressed by the lateral vibration limiting mechanism, thereby saving installation space by avoiding interference with the surrounding area of ​​the mass member and improving the durability of the connecting member. In the invention described in (xi) above, a large bonding area is secured between the surface of the spring wire of the metal coil spring and the elastomer, improving the bonding strength between the spring wire and the elastomer. This prevents the elastomer from peeling off the metal coil spring, effectively causes the elastomer to deform in accordance with the metal coil spring, and effectively obtains the damping effect of the elastomer. By disposing the elastomer so as to elastically connect adjacent spring wires in the spring axial direction of the metal coil spring, local buckling deformation of the elastomer is prevented when the metal coil spring is compressed and deformed, and since the elastomer has a high ability to follow deformation of the metal coil spring, the damping action of the elastomer can be efficiently exerted. In addition, since the mass member is directly supported by both the metal coil spring and the elastomer, the shared support load of the mass member acting on the elastomer is reduced, and changes in characteristics over time due to creep of the elastomer are mitigated. In the invention described in (xii) above, the unevenness increases the free surface area of ​​the elastomer and also makes it possible to adjust the properties of the spring, damping, etc. Furthermore, because the unevenness is formed in a spiral shape extending in the winding direction of the spring wire of the metal coil spring, the unevenness is less likely to affect the expansion and contraction deformation of the metal coil spring. In the invention described in (xiii) above, by providing the elastomer between the pitches of the spring wires with lightening portions, the portions of the elastomer that are compressed between the spring wires when vibration is input in the vertical direction are reduced. This makes it possible to prevent the spring constant of the connecting member from becoming large due to the compression spring of the elastomer, and makes it possible to soften the spring characteristics of the connecting member. In addition, the vibration damping device described in each of the aspects (xi) to (xiii) can also arbitrarily and preferably apply the corresponding configuration of the connecting member described in any one of the aspects (iv) to (vi). [Explanation of symbols]

[0094] 10 Vibration damping device unit (first embodiment) 12 Support base 14 Vibration control device (secondary vibration system) 16 First beam material 18 Second beam material 20 Mass material 22 Connecting members 24 Metal coil spring (elastic material) 26 Elastomer (elastic material) 28 Spring wire 30 Large diameter section 31 Center hole 32 Hollow section 34 Mounting flange member 36 Bolt hole (bolt fixing part) 38 Through hole 40 Ring-shaped metal fittings 42 Volts 44 Volts 50 Connecting member (second embodiment) 52 Metal coil spring (elastic material) 54 Elastomer (elastic material) 60 Connecting member (third embodiment) 62 Mounting flange member 64 Bolt hole (bolt fixing part) A Architectural structure a Structural material

Claims

1. A vibration damping device unit that is attached to an architectural structure to reduce vertical vibrations in the architectural structure, The vibration system has a support base that is fixedly attached to a structural member of the architectural structure as a main vibration system, A plurality of mass members are elastically connected to the support base by connecting members each having a spring element and a damping element, thereby forming a plurality of secondary vibration systems; The multiple sub-vibration systems form a TMD having multiple natural frequencies in the vertical direction. the mass member is supported by a plurality of the connecting members, Each of the plurality of connecting members is a composite structure in which a plurality of elastic materials made of different materials are fixed to each other, each of the plurality of elastic members constituting the connecting member has a length dimension in the vertical direction sufficient to connect the mass member to the support base; the mass member is directly and elastically supported on the support base by the plurality of elastic members constituting the connecting member, The elastic members constituting the connecting member are metal coil springs and elastomers, the elastomer is fixed to the spring wire of the metal coil spring so as to cover the entire surface of the spring wire, The metal coil spring has a structure in which the pitches of the spring wires adjacent to each other in the vertical direction are connected by the elastomer, The metal coil spring is a vibration damping device unit in which the winding diameter at both ends in the coil axial direction is larger than the winding diameter at a central portion.

2. mounting flange members each having a bolt fixing portion for fixing to either one of the mass member and the support base are provided at both vertical end portions of the connecting member; 2. The vibration damping unit according to claim 1, wherein said elastomer constituting said connecting member is fixedly attached to said mounting flange member.

3. A vibration damping device unit as described in claim 2, wherein in the mounting flange member provided on at least one end of the connecting member, the bolt fixing portion for the mass member or the support base is capable of adjusting its fixed position around an elastic central axis extending vertically in the connecting member.

4. A vibration control device unit that is attached to an architectural structure and reduces vertical vibrations in the architectural structure, The vibration system has a support base that is fixedly attached to a structural member of the architectural structure as a main vibration system, A plurality of mass members are elastically connected to the support base by connecting members each having a spring element and a damping element, thereby forming a plurality of secondary vibration systems; The multiple sub-vibration systems form a TMD having multiple natural frequencies in the vertical direction. The plurality of mass members have the same mass, A vibration damping device unit in which the spring characteristics of the connecting member, which elastically supports the mass member on the support base, are made different among the multiple mass members, thereby forming a multiple sub-vibration system in which the natural frequencies in the vertical direction are made different from one another.

5. 5. The vibration damping device unit according to claim 4, wherein each of said mass members is elastically connected to said support base by a plurality of said connecting members attached in parallel.

6. The connecting member can be selected from a plurality of types prepared with different spring characteristics, A vibration damping device unit as described in claim 4 or 5, wherein a plurality of connecting members having the same spring characteristics are attached to each of the mass members, so that each of the mass members is elastically supported by the support base with its mass evenly supported by the plurality of connecting members.

7. A vibration damping device unit as described in any one of claims 1 to 6, further comprising a lateral vibration limiting mechanism that allows vertical relative displacement of the mass member with respect to the support base and limits the amount of horizontal relative displacement of the mass member with respect to the support base.

8. The connecting member is formed of a composite structure in which an elastomer is fixed to a spring wire of a metal coil spring so as to cover the entire surface of the spring wire, 8. The vibration damping device unit according to claim 1, wherein the elastomer has a hollow structure having a central hole extending in the direction of a central axis of the metal coil spring.

9. 9. The vibration damping device unit according to claim 8, wherein at least one of an inner peripheral surface and an outer peripheral surface of the elastomer is provided with a spiral unevenness extending in a winding direction of the spring wire of the metal coil spring.

10. 10. The vibration damping device unit according to claim 8, wherein the elastomer has groove-shaped lightening portions that open onto an inner or outer peripheral surface between adjacent spring wires in the vertical direction of the metal coil spring.

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