JP2011247027A - Vibration control device and separating wall using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control device having excellent vibration control performance and a separating wall.SOLUTION: The vibration control device 1 is provided between an upper horizontal member 2 which is horizontally extended in the upper side of a building and a lower horizontal member 3 which is horizontally extended in the lower side than the upper horizontal member 2, and absorbs a horizontal force between the upper horizontal member 2 and the lower horizontal member 3. The vibration control device 1 includes: an upper frame body 5 which is fixed to the upper horizontal member 2 and has truss structure; a lower frame body 6 which is fixed to the lower horizontal member 3 and has truss structure; and a vibration absorbing part 7 which is provided between the upper frame body 5 and the lower frame body 6 in a state of being vertically stretched. The vibration absorbing part 7 has a viscoelastic body 8 which is shear-deformed by a relative horizontal displacement between the upper frame body 5 and the lower frame body 6.

Description

  The present invention relates to a vibration damping device having excellent vibration damping performance and a partition wall using the vibration damping device.

  In recent years, various devices for attenuating vibration generated in a building have been proposed. For example, in the following Patent Document 1, it is proposed that shear deformation generated between upper and lower beams of a building is transmitted to a viscoelastic body to absorb vibration energy. Patent Document 2 below proposes that a mass unit having a predetermined natural frequency is disposed on the ceiling of a building to absorb vibration energy.

JP 2006-169952 A JP 2005-188272 A

  However, in the configuration of Patent Document 1, slight vibration such as traffic vibration having a small amplitude is absorbed by play of a fastening portion of each member, and the shear deformation is not sufficiently generated in the viscoelastic body. In some cases, the vibration effect could not be obtained.

  In addition, it is necessary for the structure as in Patent Document 2 to match the natural frequency of the building and the mass unit. However, if the vibration characteristics of the building change due to deterioration over time or changes in lifestyle, the original effect is exhibited. It becomes impossible and maintenance is necessary. Further, since it is necessary to install a plurality of mass units of several hundred kilometers per vehicle depending on the building size, there is a problem of cost including reinforcement of the roof surface to be installed.

  The present invention was devised in view of the above circumstances, and not only attenuates large vibrations such as earthquakes at an early stage, but also attenuates fine vibrations caused by traffic vibrations and strong winds with good responsiveness. The main purpose is to provide a vibration damping device and a partition wall using the vibration damping device.

  The invention according to claim 1 of the present invention is attached between an upper horizontal member extending horizontally on the upper side of a building and a lower horizontal member extending horizontally below the upper horizontal member, and the upper horizontal member A vibration damping device that absorbs a horizontal force between a member and a lower horizontal member, and is fixed to the upper horizontal member and an upper frame made of a frame having a truss structure, and fixed to the lower horizontal member A lower frame made of a frame having a truss structure, and a vibration absorber attached in a state of being pulled up and down between the upper frame and the lower frame, and the vibration absorber Has a viscoelastic body that is shear-deformed by a relative horizontal displacement between the upper frame and the lower frame.

  In the invention according to claim 2, the upper frame body and the lower frame body include a pair of ribs facing each other in parallel, an upper rail that connects the upper side of the bar material, and a lower frame that connects the lower side of the bar material. 2. The vibration damping device according to claim 1, further comprising a pair of diagonal members including a cross and having a rectangular frame and extending obliquely in the rectangular frame.

  The invention according to claim 3 is the vibration damping device according to claim 2, wherein each frame member is attached to a stud extending up and down in the partition wall of the building.

  According to a fourth aspect of the present invention, there is provided a connecting saddle member for connecting a saddle member of the upper frame member and a saddle member of the lower frame member between the upper frame member and the lower frame member, The connection saddle member is attached to each of the upper frame body and the lower frame body via a connection material that connects the upper frame body and the lower frame body so as to enable horizontal relative displacement. This is a vibration damping device.

  According to a fifth aspect of the present invention, the vibration absorber includes an upper bracket attached to the upper frame side, a lower bracket attached to the lower frame, the upper bracket and the lower side. A plate spring piece for connecting the bracket to the horizontal displacement, and the upper bracket includes a first support piece extending downward, while the lower bracket extends upward and the first support piece. And a second support piece opposing the first support piece and the second support piece, and the viscoelastic body is fixed between the first support piece and the second support piece. Device.

  According to a sixth aspect of the present invention, the upper bracket is fixed to the upper frame with a bolt, and the lower bracket is fixed to the lower frame via a brace whose length is adjustable. A vibration damping device according to claim 5.

  According to a seventh aspect of the present invention, the upper bracket is fixed to the upper frame via a brace whose length is adjustable, and the lower bracket is fixed to the lower frame with a bolt. A vibration damping device according to claim 5.

  The invention according to claim 8 is the vibration damping device according to claim 5, wherein the upper bracket and the lower bracket are respectively fixed to the upper frame and the lower frame with bolts.

  The invention according to claim 9 is the vibration damping according to claim 5, wherein the upper bracket and the lower bracket are fixed to the upper frame body and the lower frame body through braces whose lengths can be adjusted, respectively. Device.

  According to a tenth aspect of the present invention, the vibration absorbing portion includes an upper bracket attached to the upper frame side, a lower bracket attached to the lower frame body, and a vertical extension therebetween. A first support provided on any one of a displacement unit that forms a four-bar rotation chain in which a pair of end-side links that are joined to each other is rotatably connected, the upper-side bracket, the lower-side bracket, or the pair of end-side links. A second support piece that is provided on any one of the upper bracket, the lower bracket, and the pair of end side links and faces the first support piece; and the first support piece of the support portion; 5. The vibration damping device according to claim 1, comprising the viscoelastic body sandwiched and fixed between the second support piece. 6.

  The invention according to claim 11 is a partition wall characterized in that both side surfaces of the vibration damping device according to any one of claims 1 to 10 are covered with a face material.

  The invention according to claim 12 is characterized in that the face material includes an upper face material fixed only to the upper support side, and a lower face material fixed only to the lower support side. The partition wall according to claim 11, wherein a small gap is provided between the face material and the lower face material.

  The vibration damping device of the present invention includes an upper frame made of a frame fixed to the upper horizontal member and having a truss structure, a lower frame made of a frame fixed to the lower horizontal member and having a truss structure, and an upper part Between the frame and the lower frame, there is a vibration absorbing portion attached in a state of being pulled up and down. The vibration absorber has a viscoelastic body that is shear-deformed by a relative horizontal displacement between the upper frame and the lower frame.

  In such a vibration damping device, since the upper frame body and the lower frame body have a truss structure and high rigidity, even with a small horizontal force generated between the upper horizontal member and the lower horizontal member, Absorption due to deformation of the upper frame and the lower frame is suppressed. As a result, the upper frame and the lower frame can reliably transmit relative horizontal displacement due to the horizontal force to the vibration absorbing portion, and the viscoelastic body is sheared to absorb vibration energy associated with the horizontal force. can do. Therefore, the vibration damping device of the present invention can absorb vibration energy with good responsiveness to not only large vibration but also fine vibration, and can attenuate the vibration at an early stage.

It is a front view of the partition wall using the damping structure which shows embodiment of this invention. It is a perspective view which expands and shows an upper frame. It is a perspective view which expands and shows a lower frame. It is a fragmentary sectional view which expands and shows the brazing material of the upper frame, the connecting brazing material, and the connecting material. It is a fragmentary sectional view which expands and shows the eaves of a lower frame, a connection eaves, and a connection material. It is a figure explaining the state which carried out horizontal relative displacement between a brazing material and a connection brazing material. It is a perspective view which expands and shows a vibration absorption part. It is A1-A1 sectional drawing of FIG. It is a front view which shows the state which the vibrational absorption part deform | transformed. It is A2-A2 sectional drawing of FIG. It is a perspective view which expands and shows the vibrational absorption part of other embodiment. It is A3-A3 sectional drawing of FIG. It is a front view which shows the state which the vibrational absorption part of FIG. 11 deform | transformed. (A) is “load—relative displacement between upper frame and lower frame” with an amplitude of 0.05 mm, and (b) is “load—relative displacement between upper frame and lower frame” with an amplitude of 0.3 mm. It is a graph to show. (A) “0.05 Viscoelastic body deformation—relative displacement between upper and lower frames” and (b) 0.3 mm amplitude “Viscoelastic body deformation—upper frame and lower frame” It is a graph which shows "relative displacement with a frame."

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the vibration damping device 1 of the present embodiment includes, for example, an upper horizontal member 2 that extends horizontally on the upper side of a building such as a house, and a lower portion horizontally than the upper horizontal member 2. It is attached between the extended lower horizontal member 3 and absorbs the horizontal force between the upper horizontal member 2 and the lower horizontal member 3 to attenuate the vibration. In this embodiment, the upper horizontal member 2 is the first floor portion ceiling plate 2a, and the lower horizontal member 3 is the first floor portion floor plate 3a.

  In the present embodiment, the vibration damping device 1 is provided inside the partition wall W of the industrialized house.

  As shown in FIG. 1, the partition wall W includes an upper runner 30A attached to the upper horizontal member 2 and extending horizontally, a lower runner 30B attached to the lower horizontal member 3 and extending horizontally, an upper side, Wall base material such as light iron including vertical studs 31 and 31 having a square cross section extending between the lower horizontal members 2 and 3, and a surface made of, for example, gypsum board covering both side surfaces of the wall base material It is comprised from the material 33, and the hollow part i is formed in an inside. And the damping device 1 of this embodiment is stored in this hollow part i.

  As shown in FIG. 2, the upper and lower runners 30A and 30B have a substantially groove-shaped cross section having a web 30a and a pair of flanges 30b extending from both ends thereof. Further, the upper runner 30A is fixed to the upper horizontal member 2 with screws, nails or the like with the groove portion directed downward. On the other hand, as shown in FIG. 1, the lower runner 30 </ b> B is fixed with the groove portion facing upward and the web (not shown) in contact with the lower horizontal member 3.

  As shown in FIGS. 1 to 3, the vertical stud 31 is formed in a pipe having a square cross section. Further, the vertical stud 31 is divided into three parts at substantially equal intervals in the vertical direction, the upper vertical stud 31A disposed on the upper side, the lower vertical stud 31B disposed on the lower side, and the upper and lower vertical studs 31A. , 31B including an inner vertical stud 31C. Each vertical stud 31A, 31B, 31C is arranged in a non-connected state where they are not connected to each other.

  In the present embodiment, a lateral stud 32 is provided. The horizontal stud 32 is formed in the shape of a square pipe like the vertical stud 31, and the upper horizontal stud 32A extending horizontally between the lower ends of the upper vertical studs 31A and 31A and the upper ends of the lower vertical studs 31B and 31B. And a lower horizontal stud 32B extending horizontally.

  As shown in FIG. 1, the vibration damping device 1 includes an upper frame 5 fixed to the upper horizontal member 2, a lower frame 6 fixed to the lower horizontal member 3, and the upper frame 5 A vibration absorbing portion 7 attached between the lower frame body 6 is included.

  The upper frame 5 includes a pair of saddle members 11, 11 facing in parallel, an upper rail 12 that connects the upper side of the saddle members 11, 11, and a lower rail 13 that connects the lower side of the saddle members 11, 11. Has a rectangular frame. Further, the upper frame body 5 includes a pair of diagonal members 14 that are connected to the lower rail 13 by pinning downward in the rectangular frame from, for example, the upper side of the saddle member 11. The saddle member 11, the upper rail 12, the lower rail 13, and the diagonal member 14 of the present embodiment are made of, for example, a light iron material having a substantially groove-shaped cross section. Since such an upper frame 5 includes a truss structure, bending deformation of each member is suppressed and high rigidity can be exhibited.

  The saddle member 11 has, for example, a substantially groove-shaped cross section composed of a web 11a and flanges 11b and 11b, and is formed to have substantially the same length as the upper vertical stud 31A. Moreover, while the groove | channel part is orient | assigned inside, the web 11a is contact | abutted and fixed to the upper vertical stud 31A. Furthermore, the upper end of the saddle member 11 is fitted into the groove portion of the upper runner 30A and fixed with screws. Thereby, the upper frame body 5 is integrally fixed to the upper horizontal member 2.

  Further, as shown in an enlarged view in FIG. 4, an end plate 15 having a surface perpendicular to the longitudinal direction of the brazing material 11 and closing the groove is provided at the lower end of the brazing material 11. The end plate 15 is provided with a hole 15h penetrating in the thickness direction.

  As shown in FIG. 2, the upper rail 12 has a substantially groove-shaped cross section having a web 12 a and flanges 12 b and 12 b as well as the brazing material 11. The upper rail 12 has its groove portion directed downward, and both ends thereof are fitted into the groove portion of the saddle member 11 at a position below the upper runner 30A and are integrally joined by welding.

  The lower rail 13 also has a substantially groove-shaped cross section having a web 13a and flanges 13b and 13b. Further, the lower rail 13 has its groove portion directed upward, and both ends thereof are fitted into the groove portion on the lower end side of the saddle member 11 and are integrally joined. In addition, the lower rail 13 is provided with a fixing plate 16 that hangs from the lower end on the center side thereof, and the upper lateral studs 32 </ b> A and 32 </ b> A are fixed to both sides of the fixing plate 16. The fixing plate 16 of the present embodiment is formed with a concave portion 16c whose lower end is cut into a concave shape.

  The diagonal member 14 has a substantially groove shape in cross section, and the groove portion is fixed so as to face downward. Further, the upper end of the diagonal member 14 is below the upper rail 12 and is fitted into the groove portion of the collar member 11 and is pin-joined using screws. Further, the lower end of the diagonal member 14 is fitted into the groove portion of the lower rail 13 and pin-joined at the center portion side in the width direction of the lower rail 13. Thereby, a truss structure is provided in the upper frame 5. In the present embodiment, the lower ends of the diagonal members 14, 14 are joined apart from each other, but the mounting shape may be changed as appropriate.

  Next, as shown in FIG. 3, the lower frame 6 is configured to include a saddle member 21, an upper bar 22, a lower bar 23, and a diagonal member 24. Further, the lower frame body 6 includes a pair of projecting pieces 25 projecting obliquely upward from the upper end side of the saddle member 21.

  Like the collar 11 of the upper frame 5, the collar 21 has a substantially groove-shaped cross section including a web 21a and flanges 21b and 21b, and is set to have the same length as the lower vertical stud 31B. . The saddle member 21 is fixed by bringing the web 21a into contact with the lower vertical stud 31B.

  Further, an end plate 27 that closes the groove portion is provided at the upper end of the saddle member 21. The end plate 27 is formed with a hole portion 27h penetrating in the thickness direction. Further, a leg plate 26 is provided at the lower end of the saddle member 21 and extends horizontally in a flange shape. The leg plate 26 is fixed to the floor plate 3a (shown in FIG. 1) by screws or nails, for example, so that the lower frame body 6 and the lower horizontal member 3 are integrally fixed.

  The upper bar 22 also has a substantially groove-shaped cross section including a web 22a and flanges 22b and 22b. Further, the upper rail 22 has its groove portion directed downward, and both ends thereof are fitted into and joined to the groove portion of the collar member 21. Further, the lower horizontal stud 32B is attached to the web 22a of the upper bar 22.

  The lower rail 23 also has a substantially groove shape in cross section, the groove portion is directed upward, and both ends thereof are fitted and joined to the lower groove portion of the saddle member 21 at a position above the lower runner 30B. The

  The diagonal member 24 has, for example, a substantially groove-shaped cross section composed of a web 24a and flanges 24b and 24b. The diagonal member 24 has a groove portion directed downward, and the upper end of the diagonal member 24 is below the upper rail 22 and is fitted into the groove portion of the collar member 21 to be pin-joined. Further, the lower end of the diagonal member 24 is fitted into the groove portion of the lower rail 23 and pin-joined at the center portion side in the width direction of the lower rail 23.

  The protruding piece 25 also has a substantially groove-shaped cross section having a web 25a and a flange 25b. The projecting piece 25 has its groove portion directed upward, and is fitted into the groove portion of the collar member 21 at a position above the upper bar 22 and joined by welding or the like.

In the present embodiment, as shown in FIG. 1, a connecting rod that connects the brazing material 11 of the upper frame 5 and the brazing material 21 of the lower frame 6 between the upper frame 5 and the lower frame 6. A material 28 is provided. As shown in FIGS. 4 and 5, the connecting rod material 28 abuts against the rod materials 11 and 21 via a connecting material 29 that connects the upper frame body 5 and the lower frame body 6 so as to allow relative displacement. To be fixed.

  The connecting saddle member 28 has, for example, a substantially groove-shaped cross section composed of a web 28a and a pair of flanges 28b and 28b extending from both sides thereof, and is made of a light iron material like the saddle members 11 and 21. The connecting rod 28 is arranged with the groove portion facing inward. Further, the connecting rod 28 is formed to have substantially the same length as the vertical stud 31C in the above, and the web 28a of the connecting rod 28 is fixed to the vertical stud 31C (shown in FIG. 1).

  Further, end plates 34 and 35 for closing the groove portions are provided at both ends of the connecting rod 28. The end plates 34 and 35 are formed with holes 34h and 35h penetrating in the thickness direction, respectively.

  The connecting member 29 includes an upper connecting member 29A for connecting the connecting member 28 and the member 11 of the upper frame 5, and a lower connecting member 29B for connecting the connecting member 28 and the member 21 of the lower frame 6. Including.

  29 A of said upper connection materials are the washer-like spacer 41 distribute | arranged between the connection collar 28 and the collar 11 of the upper frame 5, and the hole of the edge part plate 34 of the connection collar 28 via this spacer 41. The bolt 42 is inserted from the portion 34 h into the hole 15 h of the end plate 15 of the saddle member 11, and the nut 43 is screwed into the bolt 42.

  The bolt 42 includes a screw shaft portion 42a inserted through each of the holes 15h and 34h and a head portion 42h formed at one end of the screw shaft portion 42a. The crest diameter (outer diameter) L1 of the screw shaft portion 42a is set smaller than the diameter L2 of the holes 15h and 34h. Thereby, as shown in FIG. 6, the saddle member 11 and the connecting saddle member 28 are connected as pin joints that can be displaced relative to each other at a minute angle.

  As shown in FIG. 5, the lower connecting member 29B has the same configuration as the upper connecting member 29A, and includes a spacer 41 disposed between the connecting member 28 and the member 21 of the lower frame 6, A bolt 42 inserted from the hole 35h of the lower end plate 35 of the connecting collar 28 through the spacer 41 into the hole 27h of the end plate 27 of the collar 21, and a nut screwed into the bolt 42 43 is comprised.

  Such a connecting member 28 is connected to the members 11 and 21 so as to be relatively displaceable at a minute angle, and the studs 31A, 31B and 31C (see FIG. 1) fixed to the members 11, 21 and 28. Are shown in an unconnected state. Thereby, the upper frame body 5 and the lower frame body 6 are connected so that relative displacement is possible respectively.

  Next, as shown in FIG. 7, the vibration absorbing portion 7 of the present embodiment includes an upper bracket 51 attached to the upper frame 5 side, a lower bracket 52 attached to the lower frame 6, In the present embodiment, the upper side bracket 51 and the lower side bracket 52 include a pair of leaf spring pieces 53 and 53 that are connected on both sides.

  The upper bracket 51 is fixed to the fixing plate 16 provided on the lower rail 13 of the upper frame 5 with bolts B1 and nuts N1, for example. The upper side bracket 51 is supported by being sandwiched between an upper front plate portion 56 fixed to the front side of the fixed plate 16, an upper rear plate portion 57 fixed to the rear side of the fixed plate 16, and these. A first support piece 58 extending downward is included.

  The upper front plate portion 56 has a U-shape including a main portion 56A extending in a vertical plane and coming into contact with the fixing plate 16, and a pair of flanges 56B and 56B protruding from both ends of the main portion 56A to one side. Eggplant. Similarly to the upper front plate portion 56, the upper rear plate portion 57 also includes a main portion 57A and flanges 57B and 57B.

  The upper front plate portion 56 and the upper rear plate portion 57 are fixed to the fixed plate 16 with bolts B1 and nuts N1 with the main portions 56A and 57A facing each other. Thereby, as shown in FIG. 8, a space S <b> 1 surrounded by the main portions 56 </ b> A and 56 </ b> B and the concave portion 16 c of the fixing plate 16 is formed in the upper bracket 51.

  As shown in FIGS. 7 and 8, the first support piece 58 is formed in a substantially rectangular plate shape when viewed from the front, and its upper end is inserted into the space S1. The first support piece 58 is fixed between the main portion 56A of the upper front plate portion 56 and the main portion 57A of the upper rear plate portion 57 with bolts B2 and nuts N2.

  The lower-side bracket 52 of the present embodiment includes a lower front plate portion 61 disposed below the upper front plate portion 56, a lower rear plate portion 62 disposed on the rear side of the lower front plate portion 61, and the lower front plate. It includes a middle plate portion 63 sandwiched between the plate portion 61 and the lower rear plate portion 62, and a pair of second support pieces 64, 64 extending upward and facing the first support piece 58 with a gap therebetween. The lower bracket 52 is fixed to the lower frame 6 via a pair of braces 67, 67 as shown in FIGS.

  The lower front plate portion 61 and the lower rear plate portion 62 are, as shown in FIGS. 7 and 8, the main portions 61A and 62A, flanges 61B, 61B, 62B, and 62B, as with the upper bracket 51. It is comprised in the U-shape including each. The middle plate portion 63 has substantially the same size as the main portions 61A and 62A and is formed in a substantially rectangular thin plate shape.

  The second support piece 64 is formed in a substantially rectangular plate shape when viewed from the front. The pair of second support pieces 64 sandwich the main portions 61A and 61B and the middle plate portion 63, and are fixed to these with bolts B3 and nuts N3. Accordingly, the lower front plate portion 61, the lower rear plate portion 62, the middle plate portion 63, and the second support piece 64 are fixed together.

  The second support piece 64 extends upward from the lower front plate portion 61 and the lower rear plate portion 62 and faces the first support piece 58 with gaps G1 and G1 therebetween. A viscoelastic body 8 is disposed and fixed in the gaps G1 and G1.

  Various viscoelastic bodies 8 can be employed, and rubber is employed in the present embodiment. When shear deformation is applied to the viscoelastic body 8, stress and strain draw a hysteresis loop, and energy corresponding to the area surrounded by the loop can be converted into heat and absorbed.

  As the viscoelastic body 8, a viscoelastic rubber (damping rubber) having a large loss tangent tan δ and a high damping property is preferably used. Examples of such viscoelastic rubber (damping rubber) include natural rubber, styrene butadiene rubber (SBR), nitrile butadiene rubber (NBR), butadiene rubber (BR), isoprene rubber (IR), butyl rubber (IIR), and halogenated. Various additives for exhibiting high damping properties can be blended with one or more rubber polymers of butyl rubber (X-IIR) and chloroprene rubber (CR). Various additives such as carbon black are known as additives that exhibit high attenuation.

  The viscoelastic body 8 of the present embodiment uses a rubber sheet having a substantially rectangular shape and a constant thickness. Such a sheet-like viscoelastic body 8 is obtained, for example, by kneading a rubber polymer and an additive using, for example, a closed kneader to obtain a rubber composition, which is formed into a sheet by using a roller head extruder or the like. It can be obtained by forming and vulcanizing and forming one or a plurality of sheets punched into a predetermined shape therefrom.

  Then, such a sheet-like viscoelastic body 8 is sandwiched between the first support piece 58 and the second support piece 64 (which is provided at two places on both sides of the first support piece 58). The surface is fixed. The viscoelastic body 8 and the first and second support pieces 58 and 64 can be fixed by, for example, a method using the self-adhesive force of the viscoelastic body 8, a method using a normal adhesive, or a vulcanization adhesion. Can be adopted. As a result, between the first support piece 58 attached to the upper bracket 51 of the vibration absorbing portion 7 and the second support piece 64 attached to the lower bracket 52, the seat in the vertical plane is the plane direction. The viscoelastic body 8 is fixed in a sandwiched state. In addition, although the thickness etc. of the viscoelastic body 8 should just be determined suitably according to the scale etc. of the building which uses the damping device 1, it is formed with about 3 mm in this embodiment.

  The pair of braces 67 have, for example, turnbuckles 68 (shown in FIG. 1) that can be adjusted in length, and extend obliquely downward in a direction away from each other from the upper end toward the lower end. The upper end of the brace 67 is fixed to the lower bracket 52 with bolts B4 and nuts N4, respectively. The lower end of the brace 67 is fixed to the projecting piece 25 (shown in FIG. 1). Such a brace 67 can pull the lower bracket 52 downward.

  The leaf spring piece 53 is formed in a substantially rectangular thin plate shape, and from the flanges 56B and 57B of the upper front plate portion 56 and the upper rear plate portion 57, to the flanges 61B and 62B of the lower front plate portion 61 and the lower rear plate portion 62. These are fixed by bolts B5 and nuts N5 extending vertically. As a result, the upper bracket 51 and the lower bracket 52 are connected by the leaf spring piece 53. Further, since the leaf spring piece 53 is formed to have a thickness of about 1.0 to 3.0 mm, for example, the bending rigidity is weakened and the plate spring piece 53 has flexibility. Accordingly, the leaf spring piece 53 can be flexibly deformed with respect to a small horizontal displacement between the upper bracket 51 and the lower bracket 52.

  On the other hand, since the leaf spring piece 53 has tensile rigidity, the tensile force of the brace 67 can be applied to the upper bracket 51 via the leaf spring piece 53. As a result, the upper bracket 51 and the lower bracket 52 absorb backlash such as bolt holes and are pulled up and down. Therefore, the vibration absorbing unit 7 of the present embodiment can reliably transmit the vibration even for a small shake such as a traffic vibration or a slight vibration caused by a strong wind. Note that the vertical tension applied to the vibration absorber 7 can be adjusted as appropriate by adjusting the length of the brace 67 using the turnbuckle 68.

The operation of the vibration damping device 1 of the present embodiment configured as described above will be described.
When a horizontal force acts between the upper horizontal member 2 and the lower horizontal member 3, the horizontal force is applied to the upper frame 5 via the upper and lower runners 30A and 30B and the upper and lower vertical studs 31A and 31B. And transmitted to the lower frame 6.

  Since the upper frame body 5 and the lower frame body 6 include the truss structure as described above, the upper frame body 5 and the lower frame body 6 have high rigidity, and the upper frame body 5 and the lower frame body 6 are generated by a small horizontal force generated between the upper horizontal member 2 and the lower horizontal member 3. The body 5 and the lower frame 6 itself are not bent and deformed.

  Further, the upper frame body 5 and the lower frame body 6 are coupled to each other via a coupling rod 28 so as to be capable of relative displacement. Accordingly, as shown in FIG. 9, the horizontal displacement is transmitted from the upper frame 5 to the upper bracket 51 of the vibration absorbing portion 7 via the fixing plate 16, and from the lower frame 6 to the brace. It is transmitted to the lower bracket 52 via 67. Since the upper bracket 51 and the lower bracket 52 are connected by a flexible leaf spring piece 53 so as to be horizontally displaceable, the first support piece 58 and the second support piece 64 can be horizontally displaced.

  As shown in FIG. 10, the viscoelastic body 8 sandwiched between the first support piece 58 and the second support piece 64 undergoes shear deformation due to relative horizontal displacement, and vibration energy is caused by the hysteresis loss. Can be absorbed. Thereby, the vibration is attenuated early.

  Thus, in the vibration damping device 1 of the present embodiment, the upper frame body 5 and the lower frame body 6 have high rigidity, so that the horizontal force generated between the upper horizontal member 2 and the lower horizontal member 3 is used. The deformation of the upper frame body 5 and the lower frame body 6 itself is suppressed. Further, since the vibration absorbing portion 7 is pulled up and down, the upper frame body 5 and the lower frame body 6 can reliably transmit relative horizontal displacement due to a small horizontal force to the vibration absorbing portion 7. The viscoelastic body 8 can be subjected to shear deformation to absorb vibration energy associated with the horizontal force. Therefore, the vibration damping device 1 of the present invention can absorb vibration energy with good responsiveness to not only large vibrations but also fine vibrations, and can quickly attenuate the vibrations.

  In addition, since the vibration absorber 1 is provided with the vibration absorbing portion 7 via the upper frame body 5 and the lower frame body 6 having a length in the vertical direction, the vibration damping device 1 is a brace that is relatively susceptible to vibration and deformation due to horizontal force. The length of 67 can be shortened compared to the conventional vibration damping device. Thereby, the vibration damping device 1 can suppress the horizontal force from being absorbed by the vibration and deformation of the brace 67, and the small horizontal force can be reliably transmitted to the vibration absorbing unit 7.

  Moreover, the brace 67 can increase the angle θ (shown in FIG. 1) between the brace material 21 and the brace 67 by shortening the length thereof. For this reason, the vibration damping device 1 of the present embodiment can increase the rigidity against the horizontal force, and can effectively attenuate large vibrations. Furthermore, in this embodiment, since it is comprised only with a pair of brace 67, horizontal force absorption can be suppressed to the minimum.

  Furthermore, since the upper bracket 51 and the lower bracket 52 are connected by a flexible leaf spring piece 53, the leaf spring piece 53 flexes flexibly even with a small horizontal displacement, and the viscoelastic body 8 is subjected to shear deformation. There is no hindrance. In addition, since the leaf spring piece 53 has a high tensile rigidity, if the relative horizontal displacement between the upper frame body 5 and the lower frame body 6 becomes excessively large, the tensile force is applied to the excessive amount of the viscoelastic body 8. It functions as a displacement restricting means for restricting shear deformation to a certain size, and can prevent damage to the viscoelastic body 8 and the like.

  Further, in the vibration damping device 1 of the present embodiment, the vibration absorbing portion 7 is not directly attached to a structural housing such as a beam of a building, but is fixed to the upper frame body 5 and the lower frame body 6. Thereby, since the tension of the vibration absorbing portion 7 does not directly act on the structural frame such as a beam, it is useful for suppressing bending deformation of the beam or the like. In addition, such a construction method allows the vibration control device 1 to be installed in a place where there is no frame such as a beam, so that the degree of freedom in planning is increased and the existing partition wall studs are used for easy control. The vibration device 1 can be retrofitted.

  In addition, since the brace 67 inhibits the vibration and deformation of the brace 67 itself from absorbing vibration energy, it is preferable to increase the rigidity of the brace 67 by increasing the shaft diameter. Thereby, even if the brace 67 is a small sway, it can be reliably transmitted to the vibration absorber 7.

  In the present embodiment, the upper bracket 51 is fixed to the upper frame 5 with the bolt B1 and the lower bracket 52 is fixed to the lower frame 6 via the brace 67. It is not limited to an aspect. For example, the upper bracket 51 may be fixed to the upper frame 5 via the brace 67, and the lower bracket 52 may be fixed to the lower frame 6 with bolts B1. Furthermore, each of the upper side bracket 51 and the lower side bracket 52 may be fixed to the upper frame body 5 and the lower frame body 6 via the bolt B <b> 1, or may be fixed via the brace 67. . In the former case, the vertical lengths of the upper frame body 5 and the lower frame body 6 may be made larger than those in the above embodiment.

  In the partition wall W incorporating the vibration damping device 1 of the present embodiment, as shown in FIG. 1, the face members 33 respectively arranged on both side surfaces are divided into two, for example, with a small gap of about 2 mm. The upper and lower face members 33A and 33B are arranged independently of each other. The face members 33A and 33B are fixed to the upper and lower runners 30A and 30B, the upper and lower vertical studs 31A and 31B, and the horizontal stud 32, for example. Thereby, at the time of vibration, relative displacement can be created between the upper and lower face members 33A, 33B, and the in-plane shear rigidity of the damping wall panel can be prevented from excessively rising. This helps to reliably transmit vibration energy to the viscoelastic body 8. In addition, a face material can also be divided into 2 right and left.

11 to 13 show a vibration absorber 7 according to another embodiment of the present invention.
As shown in FIGS. 11 and 12, the vibration absorbing portion 7 of this embodiment includes an upper bracket 76, a lower bracket 77 disposed below the upper bracket 76, and a space between the upper bracket 76 and the lower bracket 77. A pair of left and right end-side links 78 and 79 that extend vertically, a first support piece 81 provided on any of the links, a second support piece 82 facing the first support piece 81, and a first support The displacement unit 70 includes a viscoelastic body 8 bonded between the piece 81 and the second support piece 82.

  In the present embodiment, the upper bracket 76 and the lower bracket 77 have the same length, and the end side links 78 and 79 on both sides have the same length.

  The upper side bracket 76 of the present embodiment includes, for example, a front plate portion 76A extending in a vertical plane and a rear plate portion 76B fixed to the front plate portion 76A via the fixing plate 16. The front plate portion 76A and the rear plate portion 76B are provided with convex portions 76c and 76c that protrude downward from both sides thereof, and have substantially the same shape.

  The lower bracket 77 also includes, for example, a front plate portion 77A extending in a vertical plane and a rear plate portion 77B fixed to the front plate portion 77A via a spacer 77S. The front plate portion 77A and the rear plate portion 77B are provided with convex portions 77c and 77c protruding upward from both sides thereof, and have substantially the same formation.

  The end side links 78 and 79 are formed in a substantially rectangular plate shape extending vertically in the vertical plane. Further, the end side links 78 and 79 are disposed between the convex portions 76c and 76c of the upper side bracket 76 and the convex portions 77c and 77c of the lower side bracket 77, and can be freely rotated by bolts B6, nuts N6, and the like. Connected.

  As a result, the displacement unit 70 has a parallel link mechanism as a four-joint rotation chain by the upper bracket 76, the lower bracket 77, and the end links 78 and 79 being pivotally connected to each other by a rotatable pair 83. Is configured. In addition, although the displacement unit 70 consists of metal materials, it cannot be overemphasized that the specific shape, length, etc. can be deform | transformed into various aspects, without being limited to the illustrated aspect.

  In the present embodiment, the first support piece 81 is, for example, the front side of the left side (one) end side link 78 in the drawing (the front side of the paper surface in FIG. 11 is the front side and the back side of the paper surface is the rear side). It is fixed by bolts B7 and nuts N7. The right (other) end of the first support piece 81 protrudes into a substantially rectangular space surrounded by the upper bracket 76, the lower bracket 77, and the end links 78 and 79. However, the first support piece 81 protrudes with a length that does not interfere with the right (the other) end-side link 79.

  On the other hand, the second support piece 82 is fixed to the rear side of the right (the other) end side link 79 in the drawing by a bolt B8 and a nut N8. The left (one) end of the second support piece 82 protrudes into a substantially rectangular space surrounded by the upper bracket 76, the lower bracket 77, and the end links 78 and 79, and the first support piece. 81 is arranged to face each other in parallel. The second support piece 82 also protrudes with a length that does not interfere with the left (one) end side link 78. In this way, the first support pieces 81 and the second support pieces 82 are arranged to face each other alternately and with a gap therebetween without interfering with each other. And viscoelastic body 8 is fixed between them.

The operation of the vibration absorber 7 (displacement unit 70) of the present embodiment configured as described above will be described.
The horizontal displacement of the upper frame body 5 and the lower frame body 6 is transmitted from the lower frame 13 of the upper frame body 5 to the upper bracket 51 of the displacement unit 70, and from the lower frame body 6 through the brace 67 to the lower side. It is transmitted to the bracket 52.

  Since the displacement unit 70 forms a rotatable four-bar rotation chain, it can be easily deformed even with a small external force. Therefore, the displacement unit 70 is surely rhombus even with a slight horizontal force (relative horizontal displacement) between the upper horizontal member 2 and the lower horizontal member 3 transmitted through the upper frame body 5 and the lower frame body 6. Transforms into

  Thus, the deformation of the displacement unit 70 causes shear deformation in the viscoelastic body 8 sandwiched between the first support piece 81 and the second support piece 82, and vibration energy is generated by the hysteresis loss. Can absorb. Thereby, the vibration is attenuated early.

  In the present embodiment, in the displacement unit 70, the link length a of the upper bracket 76 (and the lower bracket 77) is formed to be larger than the link length b of the end portion links 78 and 79. In this example, the link length ratio (a / b) is about 4.0.

  In such a displacement unit 70, the shear displacement in the horizontal direction can be amplified about 4 times and given to the viscoelastic body 8. In other words, even a smaller horizontal force (microvibration) is preferable in that the viscoelastic body 8 can be reliably subjected to a large shear deformation to absorb vibration energy.

  The link length ratio (a / b) is not particularly limited, and can be variously determined according to the scale of the building used and the assumed horizontal force. However, if it is too large, a large load is applied to the brace and the like, so that a reinforcing structure is required and there is a problem in accommodation. From such a viewpoint, when installing on the partition wall etc. of an industrialized house, it is preferable to determine the ratio (a / b) of the said link length by about 2-4, for example.

  In this embodiment, as described above, the viscoelastic body 8 can be amplified to transmit the shear displacement. However, if the shear deformation generated in the viscoelastic body 8 is increased, the viscoelastic body 8 may be damaged. Therefore, as shown in FIG. 13, it is desirable to provide a displacement restricting means 84 for restricting the shear displacement of the viscoelastic body 8 to a certain size.

  When the shear displacement of the viscoelastic body 8 reaches a certain amount (in this embodiment, 3 mm or more corresponding to the thickness of the viscoelastic body 8), the displacement restricting means 84 causes the distal end portion of the first support piece 81 to move upward. The lower end surface 76e of the bracket 76 and the tip of the second support piece 82 abut against the upper edge portion 77e of the lower bracket 77, respectively, and deformation of the displacement unit 70 is restrained. Thereby, damage caused by excessive shear deformation in the viscoelastic body 8 can be effectively prevented.

  In the displacement unit 70 of this embodiment, the first support piece 81 and the second support piece 82 are provided on the end side links 78 and 79, but the upper side bracket 76 and the lower side bracket 77 are respectively provided. It may be provided.

  As mentioned above, although especially preferable embodiment of this invention was explained in full detail, this invention is not limited to embodiment of illustration, It can deform | transform and implement in a various aspect.

A partition wall using the vibration damping device shown in FIG. 1 was prototyped, and a minute amplitude loading experiment using a vibration table was performed to confirm the performance of the vibration damping device. In this experiment, the upper horizontal member is fixed to the reaction frame and the lower horizontal member is fixed to the vibration table, and the vibration table is vibrated with a sine wave having a frequency of 0.01 Hz, an amplitude of 0.05 mm, and 0.3 mm. Thus, a forced displacement in the horizontal direction was given to the cut wall. The experimental results are as follows: “Load (N) —relative displacement between upper frame and lower frame (mm)” in FIG. 14 and “Viscoelastic body deformation (mm) —upper frame and lower frame The “relative displacement (mm)” is shown in FIG.

  As a result of the experiment, it was found that the vibration damping device of the example exhibited an energy absorption effect by drawing a loop from an extremely small deformation with an amplitude of 0.05 mm as shown in FIG. Further, as shown in FIG. 15A, it was confirmed that the vibration damping device of the example can absorb the vibration energy by the shear displacement of the viscoelastic body from the amplitude of 0.05 mm.

DESCRIPTION OF SYMBOLS 1 Damping device 2 Upper horizontal member 3 Lower horizontal member 5 Upper frame body 6 Lower frame body 7 Vibration absorption part 8 Viscoelastic body

Claims (12)

A horizontal force between the upper horizontal member and the lower horizontal member, which is attached between the upper horizontal member extending horizontally on the upper side of the building and the lower horizontal member extending horizontally below the upper horizontal member. A vibration damping device that absorbs
An upper frame made of a frame fixed to the upper horizontal member and having a truss structure;
A lower frame composed of a frame fixed to the lower horizontal member and having a truss structure;
A vibration absorbing portion attached in a state of being pulled up and down between the upper frame and the lower frame;
The vibration absorber includes a viscoelastic body that is shear-deformed by a relative horizontal displacement between the upper frame and the lower frame. The upper frame body and the lower frame body have a rectangular frame including a pair of saddle members facing in parallel, an upper rail that connects the upper side of the saddle material, and a lower rail that connects the lower side of the saddle material, The vibration damping device according to claim 1, further comprising a pair of diagonal members extending obliquely in the rectangular frame.   The vibration control device according to claim 2, wherein each of the saddle members is attached to a stud extending up and down in a partition wall of the building. Between the upper frame and the lower frame, there is provided a connecting frame for connecting the frame of the upper frame and the frame of the lower frame,
4. The connection frame according to claim 1, wherein the connection frame is attached to the upper frame and the lower frame via a connection material that connects the upper frame and the lower frame so as to enable horizontal relative displacement. 5. The vibration damping device described. The vibration absorbing portion includes an upper bracket attached to the upper frame, a lower bracket attached to the lower frame, and a plate that connects the upper bracket and the lower bracket so as to be horizontally displaced. The upper bracket includes a first support piece that extends downward, while the lower bracket extends upward and faces the first support piece with a gap therebetween. The vibration damping device according to any one of claims 1 to 4, further comprising a piece, wherein the viscoelastic body is fixed between the first support piece and the second support piece. The upper bracket is fixed to the upper frame with a bolt,
The vibration damping device according to claim 5, wherein the lower bracket is fixed to the lower frame through a brace whose length is adjustable. The upper bracket is fixed to the upper frame body through a brace whose length is adjustable,
The vibration damping device according to claim 5, wherein the lower bracket is fixed to the lower frame with a bolt.   6. The vibration damping device according to claim 5, wherein the upper bracket and the lower bracket are fixed to the upper frame and the lower frame with bolts, respectively.   The vibration damping device according to claim 5, wherein the upper bracket and the lower bracket are fixed to the upper frame body and the lower frame body through braces whose lengths are adjustable. The vibration absorber rotates an upper bracket attached to the upper frame side, a lower bracket attached to the lower frame body, and a pair of end side links extending vertically between them. Displacement unit that forms a four-bar rotation chain that is freely pivoted,
A first support piece provided on any one of the upper bracket, the lower bracket, or the pair of end side links, and any one of the upper side bracket, the lower side bracket, or the pair of end side links. A second support piece provided and facing the first support piece,
5. The vibration damping device according to claim 1, comprising the viscoelastic body that is sandwiched and fixed between a first support piece and a second support piece of the support portion.   A partition wall characterized in that both side surfaces of the vibration damping device according to claim 1 are covered with a face material. The face material has an upper face material fixed only to the upper support side, and a lower face material fixed only to the lower support side,
The partition wall according to claim 11, wherein a small gap is provided between the upper face material and the lower face material.

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