JP2014098440A - Vibration control structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate a suitable friction force according to a load.SOLUTION: In a vibration control structure, a building frame is provided with plural dampers arranged between a pair of members relatively moving in a predetermined direction, and restraining the relative movement by a friction force of pressure-welding plates sliding together with the relative movement, and vibration is controlled in connection with the friction dampers. The friction damper comprises: a first pressure-welding plate provided to one of the pair of members; and a second pressure-welding plate provided to the other of the pair of members. The second pressure-welding plate is provided with a long hole with which the plate can slide by a predetermined traveling amount. The first pressure-welding plate pressure-welded to a first friction damper is coupled with the first pressure-welding plate pressure-welded to a second friction damper, so that they can relatively move by a traveling amount smaller than the predetermined traveling amount.

Description

  The present invention relates to a damping structure for two members that move relative to each other.

  For example, a friction damper is known as a damping structure that attenuates vibration at a joint between two members that can move relative to each other. This friction damper is provided, for example, in a stud provided between floors that move relative to each other in the horizontal direction in a building frame, and the relative movement is suppressed by the frictional force between the pressure plates that slide with the aforementioned relative movement. (For example, refer to Patent Document 1).

JP 2012-67806 A

  FIG. 22 is an explanatory diagram of the load and deformation in Patent Document 1. Referring to FIG. 22, in the method of Patent Document 1, when an intermediate load from point A to A ′ is applied, deformation does not occur, that is, energy is not absorbed. Therefore, it is desired to generate a more appropriate frictional force according to the load.

  This invention is made | formed in view of such a situation, and it aims at producing an appropriate frictional force according to a load.

  In order to achieve such an object, in the vibration damping structure according to the present invention, the friction between the pressure plates arranged between a pair of members that move relative to each other in a predetermined direction in the building frame and slide with the relative movement. A plurality of friction dampers that suppress the relative movement by force, and a vibration damping structure in which the friction dampers interlock to suppress vibrations, and the friction dampers are provided on one of the pair of members. A first pressure contact plate and a second pressure contact plate provided on the other member of the pair of members, wherein the second pressure contact plate is provided with a long hole that allows a predetermined amount of movement to slide; The first pressure contact plate with which the first friction damper is in pressure contact and the first pressure contact plate with which the second friction damper is in pressure contact are coupled so as to be capable of relative movement with a movement amount shorter than the predetermined movement amount. This is a vibration control structure characterized by that.

  According to such a vibration control structure, when a relative movement occurs between one member and the other member, the first pressure contact plate in the first friction damper first moves relative to the second pressure contact plate. A frictional force is generated between the first pressure contact plate and the second pressure contact plate in the first friction damper. When the relative movement of the movement amount shorter than the predetermined movement amount is completed, the first pressure contact plate in the second friction damper also moves relative to the second pressure contact plate. A frictional force is generated between the first pressure contact plate and the second pressure contact plate in the friction damper. That is, it is possible to generate a two-stage friction force, that is, a friction force in the first friction damper and a friction force in the first friction damper and the second friction damper. By adjusting these frictional forces, appropriate frictional forces can be generated according to the load.

In this vibration damping structure, it is preferable that the friction damper has a bolt member that passes through the through hole provided in the first pressure contact plate and the long hole provided in the second pressure contact plate. .
According to such a vibration control structure, the second pressure contact plate can be slid with respect to the first pressure contact plate, and the predetermined movement amount can be defined by the bolt member.

In this vibration damping structure, a connecting long hole is provided in any one of the first pressure plate to which the first friction damper is pressed and the first pressure plate to which the second friction damper is pressed. The first friction plate is provided with a connecting hole on the other side, and the first friction damper is in pressure contact with the first friction damper, and the first pressure contact plate is in pressure contact with the second friction damper. It is desirable to be connected by a pin member that is inserted through the connecting long hole.
According to such a vibration damping structure, the second pressure contact plate with which the first friction damper is in pressure contact and the first pressure contact plate with which the second friction damper is in pressure contact can be moved relative to each other. On the other hand, the first pressure contact plate with which the first friction damper is pressure-contacted stepwise and the second pressure contact plate with which the second friction damper is pressure-contacted can slide to generate a frictional force stepwise. .

In this vibration damping structure, it is preferable that the pin member is movable in the relative moving direction in the connecting long hole.
According to such a vibration control structure, the first pressure contact plate with which the first friction damper is pressed and the first pressure contact plate with which the second friction damper is pressed can be relatively moved.

In this vibration damping structure, a part of each of the first pressure-contact plate to which the first friction damper is pressed and the first pressure-contact plate to which the second friction damper is pressed are relatively moved. Any one of the first pressure contact plate that is in pressure contact with the first friction damper and the first pressure contact plate that is in pressure contact with the second friction damper is the second pressure contact plate via a filler member. It is desirable to press.
According to such a vibration damping structure, even if the height disposed between the first pressure contact plate in the first friction damper and the first pressure contact plate in the second friction damper is different, A pressure contact force can be appropriately applied to the second pressure contact plate using the filler member.

In this vibration damping structure, for connection provided on one of the first pressure contact plate with which the first friction damper is in pressure contact and the first pressure contact plate with which the second friction damper is in pressure contact It is desirable that the length of the long hole is shorter than the length of the long hole provided in the second pressure contact plate.
According to such a vibration damping structure, the first pressure contact plate with which the first friction damper is pressed and the first pressure contact plate with which the second friction damper is pressed are relatively moved with a movement amount shorter than a predetermined movement amount. Can be possible.

In this vibration damping structure, a friction plate sandwiched between the first pressure contact plate and the second pressure contact plate, and a sliding plate fixedly provided on the surface of the second pressure contact plate and in contact with the friction plate It is desirable to provide
According to such a vibration damping structure, a more stable friction force can be obtained.

In this vibration damping structure, it is preferable that the second pressure contact plate is sandwiched between at least two first pressure contact plates.
Even with such a vibration damping structure, a more stable frictional force can be obtained.

In this vibration damping structure, it is preferable that a plurality of at least one of the first friction damper and the second friction damper is provided.
According to such a vibration damping structure, it is possible to adjust the frictional force generated by increasing or decreasing the number of friction dampers.

In this vibration damping structure, it is preferable that the second pressure contact plate is at least one of an H-shaped steel web and a flange.
According to such a vibration damping structure, a plurality of friction dampers can be configured using a part of the H-shaped steel.

It is desirable that the vibration damping structure further includes a constant friction generating member that generates a constant friction force when the relative movement is performed.
According to such a vibration damping structure, since the constant friction generating member is provided in the vibration damping structure in which the frictional force is switched stepwise, a constant frictional force can be applied during the relative movement of the press contact plates. The frictional force generated from the start to the end of the relative movement can be set uniformly high.

In this vibration damping structure, the constant friction generating member includes a third press contact plate provided on the one member, and a fourth press contact plate provided on the other member, and the third press contact plate A through-hole, and the fourth pressure plate includes a through-hole that is long in the predetermined direction, and has a bolt member that is provided through the through-hole of the third pressure-contact plate and the through-hole of the fourth pressure plate. Is desirable.
According to such a vibration damping structure, it is possible to provide a constant friction generating member that generates a constant friction force.

In this vibration damping structure, a friction plate sandwiched between the third pressure contact plate and the fourth pressure contact plate, and a sliding plate fixedly provided on the surface of the fourth pressure contact plate and in contact with the friction plate It is desirable to provide
According to such a vibration damping structure, a stable friction force can be obtained even in the constant friction generating member.

In this vibration damping structure, it is preferable that the friction damper and the constant friction force generating member be a disc spring.
According to such a vibration damping structure, the member that generates the pressure contact force is a disc spring having a non-linear spring region in which the load variation is small with respect to the deformation amount in the pressure direction. Can do. Further, the pressure contact force can be easily adjusted by changing the number of overlapping disc springs.

In this vibration damping structure, in one of the first friction damper and the second friction damper, a through hole of the first pressure contact plate is a long hole that is long in the relative movement direction, and It is desirable that a fifth pressure contact plate sandwiching one pressure contact plate with the second pressure contact plate is provided, and the fifth pressure contact plate has a through hole through which the bolt member is inserted.
According to such a vibration control structure, it is possible to generate a frictional force not only between the first pressure contact plate and the second pressure contact plate but also between the first pressure contact plate and the fifth pressure contact plate. At this time, since the through hole of the first pressure contact plate is a long hole, a frictional force is generated between the first pressure contact plate and the second pressure contact plate, and the bolt member is engaged with the long hole of the first pressure contact plate. A frictional force can be generated between the first pressure contact plate and the fifth pressure contact plate. That is, it is possible to generate two stages of friction force in one friction damper.

In this vibration damping structure, a long hole of the second pressure contact plate in one of the first friction damper and the second friction damper is formed in the other of the first friction damper and the second friction damper. It is desirable that it is longer than the long hole of the second pressure contact plate.
According to such a vibration damping structure, it is possible to generate a constant friction force in the other friction damper while generating a two-stage friction force in one friction damper.

In this vibration damping structure, in one of the first friction damper and the second friction damper, an elongated hole of the first pressure contact plate and the second pressure contact plate are inserted while the bolt member is inserted inside. It is desirable to provide a long hole and a pipe member that is inserted therethrough.
According to such a vibration damping structure, the bolt member can be protected by the pipe member, and its soundness can be maintained high.

In this vibration damping structure, a friction plate sandwiched between the fifth pressure contact plate and the first pressure contact plate, and a sliding plate fixedly provided on the surface of the first pressure contact plate and in contact with the friction plate It is desirable to provide
According to such a vibration damping structure, a more stable friction force can be obtained.

In this vibration damping structure, in the other of the first friction damper and the second friction damper, a through hole of the first pressure contact plate is a long hole that is long in the relative movement direction, and further, It is desirable that a sixth pressure contact plate sandwiching one pressure contact plate with the second pressure contact plate is provided, and the sixth pressure contact plate has a through hole through which the bolt member is inserted.
According to such a vibration damping structure, a two-stage friction force can be generated in one friction damper, and a two-stage friction force can be generated in the other friction damper.

  According to the present invention, an appropriate frictional force can be generated according to the load.

It is a side view of the friction damper unit in a 1st embodiment. It is a top view of the friction damper unit in a 1st embodiment. It is AA sectional drawing in FIG. It is BB sectional drawing in FIG. It is CC sectional drawing. In CC sectional drawing, it is the figure which expanded the 1st friction damper and the 2nd friction damper. It is a graph which shows the vibration energy absorption history characteristic of a friction damper unit. It is a side view of the friction damper unit in 2nd Embodiment. It is sectional drawing of the friction damper unit in 2nd Embodiment. It is a graph which shows the vibration energy absorption history characteristic of the friction damper unit in a 2nd embodiment. It is a side view of the friction damper unit in 3rd Embodiment. It is sectional drawing of the friction damper unit in 3rd Embodiment. It is DD sectional drawing of the friction damper unit in 3rd Embodiment. It is a graph which shows the vibration energy absorption history characteristic of the friction damper unit in 3rd Embodiment. It is a side view of the friction damper unit in a 4th embodiment. It is sectional drawing of the friction damper unit in 4th Embodiment. It is a graph which shows the vibration energy absorption history characteristic of the friction damper unit in 4th Embodiment. It is a side view of the friction damper unit in a 5th embodiment. It is sectional drawing of the friction damper unit in 5th Embodiment. It is EE sectional drawing of the friction damper unit in 5th Embodiment. It is a graph which shows the vibration energy absorption history characteristic of the friction damper unit in a 5th embodiment. It is explanatory drawing of the load and deformation | transformation in patent document 1. FIG.

  FIG. 1 is a side view of a friction damper unit according to the first embodiment. FIG. 2 is a top view of the friction damper unit in the first embodiment. 3 is a cross-sectional view taken along the line AA in FIG. 4 is a cross-sectional view taken along the line BB in FIG. FIG. 5 is a cross-sectional view taken along the line CC. FIG. 6 is an enlarged view of the first friction damper and the second friction damper in the CC sectional view. In these drawings, the H-shaped steel 20 is shown, but the shaft direction of the H-shaped steel 20 corresponds to the relative movement direction.

  The friction damper unit 1 includes the H-shaped steel 20, the first friction damper 10-1 to the fifth friction damper 10-5, the first splice plate 30-1 to the fifth splice plate 30-5, and the first connecting pin 50. -1 to 4th connecting pin 50-4.

  The first friction damper 10-1 to the fifth friction damper 10-5, the first splice plate 30-1 to the fifth splice plate 30-5, and the first connection pin 50-1 to the fourth connection pin 50-4 These are provided at two locations on the upper flange 20b of the H-shaped steel 20, two locations on the lower flange 20b, and one location on the web 20a (FIGS. 2 to 4). This means that, for example, five sets of the first friction damper 10-1 are provided in the friction damper unit 1. In addition, the friction damper to which the same code | symbol was attached | subjected in a figure performs the same operation | movement about the relative movement direction in the operation | movement mentioned later.

  As will be described later, the first friction damper 10-1 to the fifth friction damper 10-5 sequentially generate a frictional force in the relative movement direction when a load is applied to the H-shaped steels 20 and 40, and the friction is accumulated. Provided is a friction damper unit 1 with increased force.

  In these friction dampers, the configurations of the first friction damper 10-1, the third friction damper 10-3, and the fifth friction damper 10-5 are common, and the second friction damper 10-2 and the second friction damper 10-2 are the same. The configuration of the four friction damper 10-4 is common. Therefore, here, as a representative of these, the configuration of the first friction damper 10-1 and the second friction damper 10-2 will be described (FIG. 6). After that, the connection of each splice plate will be described.

  As described above, these friction dampers are provided on the upper and lower flanges 20b and the web 20a. Here, the friction dampers provided on the flange 20b will be described as an example. The sliding plate 34 is fixed to the flange 20b so as not to move on both upper and lower sides.

  As the fixing method, for example, (1) a method using adhesion, and (2) a surface roughness increasing process (shot blasting method) is performed on each surface constituting the fixing surface, thereby causing relative slippage on the fixing surface. There are a method for avoiding this, and (3) a method by fitting.

  The flange 20b and the sliding plate 34 are provided with long holes 21a (long holes of the second pressure contact plate) and 34a that are long in the relative movement direction. Thereby, as will be described later, the first friction damper 10-1 and the first splice plate 30-1 can move relative to the flange 20b.

  In the first friction damper 10-1, the friction plate 12 is fixed to each of the two first splice plates 30-1. As the fixing method, the same method as described above is used. Each friction plate 12 is in contact with the sliding plate 34 and slides with respect to the sliding plate 34 in relative movement described later to generate a frictional force.

  An organic friction material or an inorganic friction material can be used for the friction plate 12. Organic friction materials include thermosetting resins as binders, fiber materials such as aramid fibers, glass fibers, vinylon fibers, and carbon fibers, friction modifiers such as cashew dust and lead, and fillers such as sulfate sulfate. It is formed of a composite friction material consisting of Examples of the thermosetting resin include phenol resin, melamine resin, furan resin, polyimide resin, DFK resin, guanamine resin, epoxy resin, xylene resin, silicone resin, diallyl phthalene resin, and unsaturated polyester resin. On the other hand, the sliding plate 34 is formed of a material having corrosion resistance such as stainless steel or titanium.

  The first splice plate 30-1 and the friction plate 12 are provided with round holes 33a and 12a into which a high-strength bolt 62 described later can be inserted. A washer 64, a disc spring laminated body 61, a washer 64, a bush 65, and a washer 64 are provided on the upper first splice plate 30-1. On the other hand, two washers 64 having different sizes are disposed below the lower first splice plate 30-1. These members are provided with round holes into which the high-strength bolts 62 can be inserted. The two first splice plates 30-1 sandwich the flange 20b, and the high-strength bolt 62 is inserted into the round holes 33a and 21a and the long holes 12a and 34a and screwed into the nut 63.

  In this way, in the first friction damper 10-1, a pressure contact force is applied between the first splice plate 30-1 and the flange 20b by the high strength bolt 62 and the nut 63. Therefore, when a movement in the relative movement direction occurs between the first splice plate 30-1 and the flange 20b, a frictional force Fr11 is generated between the friction plate 12 and the sliding plate 34.

  Next, the configuration of the second friction damper 10-2 will be described. Also in the second friction damper 10-2, the flange 20b and the sliding plate 34 are provided with long holes 21a and 34a that are long in the relative movement direction.

  Each of the two second splice plates 30-2 in the second friction damper 10-2 is provided with a filler 67 and a friction plate 12 on the side facing the flange 20b. The filler 67 is fixed to the second splice plate 30-2, and the friction plate 12 is fixed to the filler 67. As the fixing method, the same method as described above is used. Each friction plate 12 is in contact with the sliding plate 34 and slides with respect to the sliding plate 34 in relative movement described later to generate a frictional force. Further, the filler 67 is provided with a round hole through which the high strength bolt 62 is inserted.

  The second splice plate 30-2 and the friction plate 12 are provided with round holes 33a and 12a into which a high-strength bolt 62 described later can be inserted. A washer 64, a disc spring laminate 61, a washer 64, a bush 65, and a washer 64 are provided on the upper second splice plate 30-2. On the other hand, two washers 64 having different sizes are disposed below the lower second splice plate 30-2. These members are provided with round holes into which the high-strength bolts 62 can be inserted. The two second splice plates 30-2 and the filler 67 sandwich the flange 20b, and the high-strength bolt 62 is inserted into the round holes 33a and 12a and the long holes 21a and 34a and screwed into the nut 63. The

  In this manner, in the second friction damper 10-2, a pressing force is applied between the second splice plate 30-2 and the flange 20b by the high-strength bolt 62 and the nut 63. Therefore, when a movement in the relative movement direction occurs between the second splice plate 30-2 and the flange 20b, a frictional force Fr12 is generated between the friction plate 12 and the sliding plate 34.

  Next, the connection between the splice plates will be described. A round hole used for fixing to the H-shaped steel 40 is provided at the left end of the first splice plate 30-1, while a long hole extending in the relative movement direction through which the first connection pin 50-1 is inserted is provided at the right end. 31b is provided.

  A round hole 32a through which the first connection pin 50-1 is inserted is provided at the left end of the second splice plate 30-2, and a round hole 32b through which the second connection pin 50-2 is inserted at the right end. Provided. In addition, a long hole 31a that is long in the relative movement direction through which the second connection pin 50-2 is inserted is provided at the left end of the third splice plate 30-3, and the third connection pin 50-3 is inserted at the right end. A long hole 31b that is long in the relative movement direction is provided.

  A round hole 32a through which the third connection pin 50-3 is inserted is provided at the left end of the fourth splice plate 30-4, and a round hole 32b through which the fourth connection pin 50-4 is inserted at the right end. Provided. A long hole 31a that is long in the relative movement direction through which the fourth connecting pin 50-4 is inserted is provided at the left end of the fifth splice plate 30-5.

  The round holes 32a and 32b of the second splice plate 30-2 and the fourth splice plate 30-4 are round holes having substantially the same size as the diameters of the first connecting pin 50-1 to the fourth connecting pin 50-4. is there. Therefore, relative movement of the first connecting pin 50-1 to the fourth connecting pin 50-4 does not occur in the round holes 32a and 32b.

  On the other hand, the long holes 31a and 31b of the first splice plate 30-1, the third splice plate 30-3, and the fifth splice plate 30-5 are long holes in the relative movement direction. 50-1 to the 4th connection pin 50-4 can move to a relative moving direction in a corresponding long hole.

  The left end of the first splice plate 30-1 is fixed to the other H-shaped steel 40. At the time of fixing, the filler 54 is sandwiched between the H-shaped steel 40, and the bolt 51 is inserted therethrough and screwed into the nut 53.

  Next, with reference to FIG. 6 in particular, the principle that the frictional force is increased stepwise in the friction damper unit 1 will be described. Suppose that a load P is applied to the H-shaped steels 20 and 40 to separate them. The load P is a load for moving the H-shaped steel 20 to the right relative to the other H-shaped steel 40. When the load P acts, the first splice plate 30-1 in the first friction damper 10-1 moves relative to the left side with respect to the flange 20b. At this time, a frictional force Fr11 is generated between the friction plate 12 and the sliding plate 34 in the first friction damper 10-1. On the other hand, since the second friction damper 10-2 to the fifth friction damper 10-5 move in the right direction relative to the flange 20b, no friction force is generated in these friction dampers.

  In the first embodiment, since the first friction dampers 10-1 are provided at five locations, the first splice plate 30-1 in the first friction damper 10-1 is relative to the left side with respect to the H-shaped steel 20. When moved, the frictional force Fr11 is generated at these five locations.

  When the relative movement further proceeds, the first connecting pin 50-1 engages with the right wall of the right end long hole 31b of the first splice plate 30-1. When the first connecting pin 50-1 is engaged, the second splice plate 30-2 moves relative to the left side with respect to the flange 20b. At this time, not only the frictional force Fr11 is generated between the friction plate 12 and the sliding plate 34 in the first friction damper 10-1, but also between the friction plate 12 and the sliding plate 34 in the second friction damper 10-2. A frictional force Fr12 is generated.

  When the relative movement further proceeds, further adjacent connecting pins engage with the long holes 31a in the splice plate. If it does so, the number of friction dampers which produce a frictional force will increase according to the same principle. Thus, the frictional force can be increased step by step as the relative movement proceeds. And the energy which can be absorbed with a frictional force can be increased in steps.

  FIG. 7 is a graph showing the vibration energy absorption history characteristics of the friction damper unit. Hereinafter, the frictional force that changes with the displacement of the H-shaped steel 20 in the relative movement direction will be described.

  When the load P acts on the H-shaped steels 20 and 40 and the load exceeds the load indicated by Sp1 (FIG. 7), between the friction plate 12 of the first friction damper 10-1 and the sliding plate 34 of the H-shaped steel 20. Sliding occurs and frictional force Fr11 is generated. At this time, the frictional force Fr11 is generated in the first friction dampers 10-1 at all five locations of the web 20a and the flange 20b.

  When the displacement indicated by Sp6 is exceeded, the first connecting pin 50-1 engages with the first splice plate 30-1, and further, the friction plate 12 of the second friction damper 10-2 and the sliding plate 34 of the H-shaped steel 20 And a frictional force Fr12 is generated. At this time, Fr11 and Fr12 are generated as frictional forces.

  Thereafter, when the displacement indicated by Sp8 is further exceeded, the second connecting pin 50-2 is engaged with the third splice plate 30-3, and the friction plate 12 of the third friction damper 10-3 and the H-shaped steel 20 are slid. Sliding occurs between the plates 34 and a frictional force Fr13 is generated. At this time, Fr11, Fr12, and Fr13 are generated as frictional forces.

  When the displacement indicated by Sp10 is exceeded, the third connecting pin 50-3 is engaged with the fourth splice plate 30-4, and further, the friction plate 12 of the fourth friction damper 10-4 and the sliding plate of the H-shaped steel 20 As a result, sliding occurs with the friction force Fr14. At this time, Fr11, Fr12, Fr13, and Fr14 are generated as frictional forces.

  When the displacement indicated by Sp12 is exceeded, the fourth connecting pin 50-4 engages with the left wall of the long hole 31a of the fifth splice plate 30-5, and the friction plate 12 of the fifth friction damper 10-5 and the H-shaped steel. The sliding between the 20 sliding plates 34 and the frictional force Fr15 occur. At this time, Fr11, Fr12, Fr13, Fr14, and Fr15 are generated as frictional forces. Note that the maximum displacement is designed so that it does not occur until the position Sp13.

  Next, when the negative load −P acts on the H-shaped steels 20 and 40, the respective parts are moved in the direction opposite to the moving direction. That is, when the negative load -P exceeds the load indicated by Sp14, sliding occurs between the friction plate 12 of the first friction damper 10-1 and the sliding plate 34 of the H-shaped steel 20, and friction is generated in the negative direction. A force Fr11 is generated.

  When the displacement indicated by Sp15 exceeds the displacement indicated by Sp15 by a further negative load, and the load exceeds the load indicated by Sp16, the first connecting pin 50-1 is engaged with the left wall of the long hole 31b of the first splice plate 30-1. As a result, sliding occurs between the friction plate 12 of the second friction damper 10-2 and the sliding plate 34 of the H-shaped steel 20, and a frictional force Fr12 is generated in the minus direction. At this time, Fr11 and Fr12 are generated as the negative frictional force.

  In this way, when the connecting pin engages with the long hole of the splice plate, the number of friction dampers that generate the friction force sequentially increases, and finally when all the friction dampers generate the friction force, the negative direction The frictional force increases until Fr11, Fr12, Fr13, Fr14, and Fr15 are generated.

  In the friction damper unit 1, when the displacement from the maximum displacement in the plus direction to the maximum displacement in the minus direction is periodically repeated, the energy of the area filled in FIG. 7 can be absorbed in one cycle.

  The above description is a case where the amplitude of vibration applied to the friction damper unit 1 is large. However, when the repeated load applied is small, for example, the following occurs.

  When the load indicated by Sp1 is exceeded in the state indicated by Sp0, as described above, the first friction damper 10-1 can be displaced to the position indicated by Sp2 while the frictional force Fr11 is generated. Here, when the load direction is reversed and the load indicated by Sp3 is exceeded in the minus direction, the first friction damper 10-1 may be displaced to the position indicated by Sp4 in a state where a negative frictional force Fr11 is generated. it can. Furthermore, when the load direction is reversed and exceeds the load indicated by Sp5, the first friction damper 10-1 can be displaced again to the position indicated by Sp2 in a state where the frictional force Fr11 is generated.

  When such a repeated load is applied, the energy of the area surrounded by Sp2, Sp3, Sp4, Sp5 can be absorbed in one cycle.

  For example, in the state indicated by Sp2, if the load indicated by Sp6 is further exceeded, the position can be displaced to the position indicated by Sp7 with the frictional force Fr12 in the second friction damper 10-2 being added as described above.

  Here, it is assumed that the load direction of the repeated load is reversed. When the load indicated by Qp1 is exceeded in the minus direction, the first friction damper 10-1 can be displaced to the position indicated by Qp2 with a negative frictional force Fr11 being generated. Further, when the load indicated by Qp3 is exceeded in the minus direction, the second friction damper 10-2 can be displaced to the position indicated by Qp4 in a state where the minus frictional force Fr12 is generated.

  Further, when the load direction is reversed and exceeds the load indicated by Qp5, the first friction damper 10 can be displaced again to the position indicated by Sp1 in a state where the frictional force Fr11 is generated.

  When such a repeated load is applied, the energy in the area surrounded by Sp1, SP2, Sp6, Sp7, Qp1, Qp2, Qp3, Qp4, and Qp5 can be absorbed.

  If the lengths of the long holes 31a and 31b of the splice plate 30 connected by the connecting pins are equal, the displacement width is uniform in the step shape of the energy absorption history characteristic as shown in FIG. On the other hand, if the length of the long hole is increased, the displacement width can be increased, and if the length of the long hole is decreased, the displacement width can be decreased. For example, when the length of the long hole 31a through which the second connecting pin 50-2 is inserted is increased, the displacement width from Sp6 to Sp7 can be increased.

  Further, the frictional force Fr can be changed by changing the frictional force of the friction damper 10. As a method of changing the frictional force, for example, the material of the friction plate 12 is made different for each friction damper 10, or the number of disc springs in the disc spring laminated body 61 is made different. For example, the load width from Sp2 to Sp3 can be increased by making the frictional force Fr12 generated in the second friction damper 10-2 larger than the frictional force generated in the other friction dampers.

  That is, according to the friction damper unit 1 described above, the friction force of the friction damper and the length of the long hole of the splice plate can be individually made different, so that it is possible to design a friction force that acts extremely freely. it can. An appropriate frictional force can be generated according to the load.

  Here, the friction damper unit 1 including the first friction damper 10-1 to the fifth friction damper 10-5 has been described. However, the number of friction dampers may be smaller or larger. You can also.

  Further, as a method of changing the above-described frictional force, the number of friction dampers can be increased or decreased. In the second embodiment to be described next, the frictional force is increased by increasing the number of friction dampers.

  FIG. 8 is a side view of the friction damper unit in the second embodiment. FIG. 9 is a cross-sectional view of the friction damper unit in the second embodiment. FIG. 9 corresponds to a cross-sectional view at a position corresponding to the CC cross section in the first embodiment. Further, in these drawings, those common to the first embodiment described above are denoted by reference numerals in the 200s to the reference numerals given in the first embodiment, and description thereof is omitted. For example, reference numeral 230-1 is assigned to the first splice plate. Further, the frictional force Fr is displayed by changing the tens place of the number to “2”. For example, the frictional force generated in the first friction damper 210-1 is displayed as Fr21.

  In the second embodiment, in order to simplify the description, two types of splice plates are provided, the first splice plate 230-1 and the second splice plate 230-2, and the connecting pins for connecting them are also the first. Only the connecting pin 250-1 is used.

  In the second embodiment, the configuration of the first friction damper 210-1 is the same as that of the first embodiment. However, in the second embodiment, the number of second friction dampers provided on the second splice plate is twice that of the first embodiment (10 sets in total).

  And two sets of 2nd friction dampers 210-2 comprised by the 2nd splice plate 230-2 by the 2 round holes provided in the 2nd splice plate 230-2 and the filler 267 are H-shaped steel 20 simultaneously. Move relative to. For this reason, when the second friction damper 210-2 moves relative to the H-shaped steel 20, the frictional force Fr12 is simultaneously generated at two locations per one second splice plate 30-2.

  FIG. 10 is a graph showing vibration energy absorption history characteristics of the friction damper unit in the second embodiment. Since the configuration of the first friction damper 210-1 is the same as that of the first embodiment, the frictional force generated from Sp1 to Sp2 in FIG. 10 is due to the five sets of first friction dampers 210-1 (5 × Fr21).

  When the first connecting pin 250-1 is engaged with the long hole 231b of the first splice plate 230-1, thereafter, the 10 sets of second friction dampers 210-2 also generate the frictional force Fr22. Therefore, in the displacement from Sp3 to Sp4, a friction force of 10 × Fr22 is added. The negative displacement and frictional force are as shown in FIG.

  Here, the number of second friction dampers 210-2 has been described as 10 sets, but the number provided is not limited thereto. Further, the number of the first friction dampers 210-1 can be increased or decreased, and the respective friction dampers in the first embodiment described above can be increased or decreased.

  By doing in this way, by increasing the number of friction dampers, it is possible to provide a friction damper unit that can provide a large stable friction force and can cope with a large load.

  FIG. 11 is a side view of the friction damper unit in the third embodiment. FIG. 12 is a cross-sectional view of the friction damper unit in the third embodiment. FIG. 12 corresponds to a cross-sectional view at a position corresponding to the CC cross section of the first embodiment. FIG. 13 is a DD cross-sectional view of the friction damper unit in the third embodiment.

  In these drawings, those common to the first embodiment described above are denoted by reference numerals in the 300s to the reference numerals used in the other embodiments, and description thereof is omitted. For example, the first splice plate is denoted by reference numeral 330-1. Further, the frictional force Fr is displayed by changing the tens place of the number to “3”. For example, the frictional force generated in the first friction damper 310-1 is displayed as Fr31.

  11 and 12, the configuration of the flange 320b is the same as that of the first embodiment. That is, the flange 320b includes the first friction damper 310-1 to the fifth friction damper 310-5, the first splice plate 330-1 to the fifth splice plate 330-5, and the first connection pin 350-1 to the first friction damper 310-1. Four connection pins 350-4 are provided in the same manner as in the first embodiment.

  What is characteristic in the third embodiment is that the web 320a is provided with two sets of constant friction dampers 310-C. Hereinafter, the configuration of the constant friction damper will be described with reference to FIG.

  Also in the third embodiment, the sliding plate 334 is fixed to the web 320a so as not to move on both the upper and lower surfaces. The web 320a and the sliding plate 334 are provided with long holes 321a and 334a which are long in the relative movement direction.

  In the third embodiment, the left end of the constant friction splice plate 330-C is fixed to the web 320a of the other H-shaped steel 340. A friction plate 312 is fixed to each of the two constant friction splice plates 330-C. Each friction plate 312 is in contact with the sliding plate 334 and slides relative to the sliding plate 334 in relative movement to generate a frictional force.

  The constant friction splice plate 330-C and the friction plate 312 are provided with round holes 333a and 312a through which the high-strength bolts 362 can be inserted. On the upper constant friction splice plate 330-C, a washer 364, a disc spring laminated body 361, a washer 364, a bush 365, and a washer 364 are provided. On the other hand, two washers 364 having different sizes are disposed under the lower constant friction splice plate 330-C. These members are provided with round holes into which the high-strength bolts 362 can be inserted. The two constant-friction splice plates 330-C sandwich the web 320a, and the high-strength bolts 362 are inserted through the round holes 333a and 312a and the long holes 321a and 334a and screwed into the nut 363.

  In this way, in the constant friction damper 310-C, a press contact force is applied between the constant friction splice plate 330-C and the web 320a by the high strength bolt 362 and the nut 363. Accordingly, when a movement in the relative movement direction occurs between the constant friction splice plate 330-C and the web 320a, a frictional force Fr3C is generated between the friction plate 312 and the sliding plate 334.

  With such a configuration, the first friction damper 310-1 to the fifth friction damper 310-5 in the flange 320b generate the frictional forces Fr31 to Fr35, respectively, by the same operation as in the first embodiment. At the same time, in the third embodiment, when relative movement occurs between the web 320a and the splice plate 330-C in the web 320a, the friction plate 312 of the constant friction damper 310-C, the sliding plate 334 of the web 320a, And a frictional force Fr3C is generated. At this time, a total of 2 × Fr3C frictional forces are generated in the two constant friction dampers 310-C in the web 20a.

  FIG. 14 is a graph showing vibration energy absorption history characteristics of the friction damper unit according to the third embodiment. In FIG. 14, the number of steps at which the frictional force is switched is the same as in the first embodiment. However, the load from Sp0 in the initial state to Sp1, which is the start of movement of the first friction damper 310-1, is high. This is because the frictional force 2 × Fr3C by the two sets of constant friction dampers 310-C always acts.

  By providing the constant friction damper 310-C in this way, a constant friction force Fr3C can be generated whenever a relative movement occurs between the H-shaped steels 20 and 40. Then, the friction force can be uniformly added to the friction force generated stepwise by the first friction damper 310-1 to the fifth friction damper 310-5.

  FIG. 15 is a side view of the friction damper unit in the fourth embodiment. FIG. 16 is a cross-sectional view of the friction damper unit in the fourth embodiment. FIG. 16 corresponds to a cross-sectional view at a position corresponding to the CC cross section in the first embodiment. In these drawings, those common to the first embodiment are denoted by reference numerals in the 400s to those given in other embodiments, and description thereof is omitted. For example, the reference numeral 430-1 is assigned to the first splice plate. Further, the frictional force Fr is displayed by changing the tens place of the number to “4”. For example, the frictional force generated in the first friction damper 410-1 is displayed as Fr41.

  In 4th Embodiment, the structure of the 1st friction damper 410-1 and the 1st splice plate 430-1 is the same as that of 1st Embodiment. On the other hand, in the fourth embodiment, a four-surface friction damper 410-W capable of generating a two-stage friction force with one friction damper is provided on the second splice plate 430-2. Hereinafter, the configuration of the four-surface friction damper 410-W will be described with reference to FIG. Note that the four-surface friction damper 410-W is provided with both the web 420a and the flange 420b, but here, the description will be made taking the example provided with the flange 420b as an example.

  Also in the fourth embodiment, the sliding plate 434 is fixed to the flange 420b so as not to move on both upper and lower surfaces. The flange 420b and the sliding plate 434 are provided with long holes 421c and 434c that are long in the relative movement direction.

  In addition, a filler 467 is fixed to each of the two second splice plates 430-2 on the flange 420b side. Further, the friction plate 412 is fixed to the filler 467. The second splice plate 430-2, the filler 467, and the friction plate 412 are provided with long holes 431c, 467c, and 412c through which the high-strength bolts 462 are inserted, respectively. Each friction plate is in contact with the sliding plate 434 of the flange 420b and slides relative to the sliding plate 434 in relative movement to generate a frictional force FrW1 (hereinafter also referred to as a first frictional force).

  In addition, the sliding plate 434 is fixed to the side where the filler 467 is not provided in the two second splice plates 430-2. The sliding plate 434 is also provided with a long hole 434c.

  Then, two press contact plates 466 (fifth press contact plates) are provided so as to sandwich these two second splice plates 430-2. Friction plates 412 are also fixed to the pressure contact plate 466. The friction plates 412 are in contact with the sliding plate 434 of the second splice plate 430-2, and slide relative to the sliding plate 434 in relative movement to generate a frictional force FrW2 ( Hereinafter, this may be referred to as a second frictional force).

  A washer 464, a disc spring laminated body 461, a washer 464, a bushing 465, and a washer 464 are provided on the upper pressure contact plate 466. On the other hand, two washers 464 having different sizes are disposed under the lower pressure contact plate 466. These members including the pressure contact plate 466 are provided with round holes through which the high-strength bolts 462 can be inserted. And the round pipe 469 penetrates these round holes and the long holes 421c, 467c, 431c, 412c, 434c. Further, the high-strength bolt 362 is inserted into the round pipe 469 and screwed with the nut 463.

  In this way, when the second splice plate 430-2 and the flange 420b move relative to each other, a first frictional force FrW1 is generated between the friction plate 412 of the filler 467 and the sliding plate 434 of the flange 420b. As the relative movement proceeds, the round pipe 469 engages with the long hole 421c of the flange 420b. Then, a second frictional force FrW2 is further generated between the friction plate 412 of the pressure contact plate 466 and the sliding plate 434 of the second splice plate 430-2. That is, in the initial stage in the relative movement of the flange 420b and the second splice plate 430-2, the frictional force FrW1 is generated, and not only the first frictional force FrW1 but also the second frictional force FrW2 is added in the later stage. It will be.

  FIG. 17 is a graph showing vibration energy absorption history characteristics of the friction damper unit in the fourth embodiment. When a load is applied, a frictional force Fr41 is first generated in the first friction damper 410-1. Therefore, in Sp1 to Sp2, the frictional force of 5 × Fr41 is generated by the five first friction dampers 410-1.

  Thereafter, the first connecting pin 450-1 is engaged with the long hole 431b of the first splice plate 430-1. When the first connecting pin 450-1 is engaged, the second splice plate 430-2 is also moved relative to the H-shaped steel 420 thereafter. As described above, when the second splice plate 430-2 and the H-shaped steel 420 are relatively moved, the frictional force of the first frictional force FrW1 is added. Here, since ten sets of second friction dampers 410-W are provided, a friction force of 10 × FrW1 is added in Sp3 to Sp4.

Further, when the relative movement proceeds and the round pipe 469 engages with the elongated hole 421c of the flange 420b, the second frictional force FrW2 is added in the subsequent relative movement. Here, since ten sets of second friction dampers 410-W are provided, Sp5 to Sp6
In this case, a frictional force of 10 × FrW2 is added.

  By doing in this way, since one four-surface friction damper 410-W can generate two stages of friction force, it is possible to provide a friction damper unit that generates a plurality of stages of friction force in a small space. .

  In the fourth embodiment, ten sets of four-surface friction dampers 410W are provided. However, the number can be increased or decreased.

  Although the description has been given assuming that the type of the four-surface friction damper is one, the length of each of the long holes 431c, 467c, 421c, 412c, 434c in the two four-surface friction dampers arranged in the second splice plate 430-2. Can be different. By making these lengths different, the number of stages of frictional force change can be further increased.

  FIG. 18 is a side view of the friction damper unit in the fifth embodiment. FIG. 19 is a cross-sectional view of the friction damper unit in the fifth embodiment. FIG. 19 corresponds to a cross-sectional view at a position corresponding to the CC cross section in the first embodiment. FIG. 20 is an EE cross-sectional view of the friction damper unit in the fifth embodiment. In these drawings, those common to the first embodiment described above are denoted by reference numerals in the 500s to the reference numerals used in the other embodiments, and description thereof is omitted. For example, the reference numeral 530-1 is assigned to the first splice plate. Further, the frictional force Fr is displayed by changing the tenth digit of the number to “5”. For example, the frictional force generated in the first friction damper 510-1 is displayed as Fr51.

  In the fifth embodiment, a first friction damper 510-1, a second friction damper 510-2, a first splice plate 530-1, a second splice plate 530-2, and a connecting pin 550-1 are provided on the web 520a. This is common to the first embodiment (FIG. 20).

  On the other hand, in the fifth embodiment, a so-called four-surface friction damper is provided on the first splice plate 530-1 and the second splice plate 530-2 in the flange 520b. However, in the four-surface friction damper in the fourth embodiment, the friction force FrW1 is generated between the flange 420b and the filler 467, and the friction force FrW1 is generated between the second splice plate 430-2 and the pressure contact plate 466. However, in the four-surface friction damper in the fifth embodiment, the frictional force FrW1 is generated between the filler 567 and the second splice plate 530-2, and the second splice plate 530-2 and the pressure contact plate 566 (sixth It is different in that the frictional force FrW2 is generated with the pressure contact plate).

  18 and 19, the reference numeral of the four-surface friction damper on the first splice plate 530-1 side is denoted by 510-W ′, and the reference numeral of the four-surface friction damper on the second splice plate 530-2 side is 510-W ′. '

  The four-surface friction damper 510-W ′ provided on the first splice plate 530-1 and the four-surface friction damper 510-W ″ provided on the second splice plate 530-2 have slightly different configurations. This is because the filler 567 is not included in the four-surface friction damper 510-W ′ in order to adjust the height, and is common in that two frictional forces are generated by one friction damper.

  FIG. 21 is a graph showing vibration energy absorption history characteristics of the friction damper unit in the fifth embodiment.

  From Sp1 to Sp2, the first splice plate 530-1 and the H-shaped steel 520 move relative to each other. Then, a frictional force Fr51 is generated in the first friction damper 510-1, and a first frictional force FrW1 is generated in the four-surface friction damper 510-W '.

  Next, the first connecting pin 550-1 'in the web 520a engages with the long hole 531b of the first splice plate 530-1'. When the first connecting pin 550-1 'is engaged, the second splice plate 530-2' is also moved relative to the web 520a in the subsequent relative movement. For this reason, in Sp3 to Sp4, the frictional force Fr52 in the second friction damper 510-2 is added.

  When the relative movement further proceeds, the first connecting pin 550-1 is engaged with the long hole 531b of the first splice plate 530-1 in the flange 520b. When the first connecting pin 550-1 is engaged, the first frictional force FrW1 is generated in the four-surface friction damper 510-W ″ in the subsequent relative movement. That is, in Sp5 to Sp6, a friction force of 4 × FrW1 is further added.

  When the relative movement further proceeds, in the flange 520b, the round pipe 569 of the four-surface friction damper 510-W 'engages with the long hole 521c of the second splice plate 530-2. When the round pipe 569 is engaged, the second frictional force FrW2 is generated in the four-surface friction damper 510-W ′ in the subsequent relative movement. That is, a frictional force of 4 × FrW2 is added from Sp7 to Sp8.

  When the relative movement further proceeds, in the flange 520b, the round pipe 569 of the four-surface friction damper 510-W ″ is engaged with the long hole 521c of the flange 520b. When the round pipe 569 of the four-surface friction damper 510-W ″ is engaged, the second friction force FrW2 is generated in the four-surface friction damper 510-W ″ in the subsequent relative movement. That is, in Sp9 to Sp10, the friction force of 4 × FrW2 is further added.

  Thus, by combining a plurality of types of friction dampers, the frictional force can be multi-staged, and an appropriate frictional force can be generated according to the load.

  The above embodiment is for facilitating the understanding of the present invention, and is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof.

1 Friction damper unit (damping structure),
10-1 First friction damper (first friction damper),
10-2 Second friction damper (second friction damper),
10-3 3rd friction damper, 10-4 4th friction damper,
10-5 Fifth friction damper,
12 friction plates,
20 H-shaped steel, 20a web, 20b flange (second press contact plate),
30-1 first splice plate (first press contact plate),
30-2 second splice plate,
30-3 3rd splice plate, 30-4 4th splice plate,
30-5 5th splice plate,
34 Sliding plate (sliding plate),
50-1 1st connection pin (connection pin), 50-2 2nd connection pin,
50-3 3rd connecting pin, 50-4 4th connecting pin,
61 disc spring laminated body, 62 high strength bolt (bolt member), 63 nut, 64 washer,
65 bush, 66 pressure contact member, 67 filler (filler member),
469 round pipe (pipe member),
330-C splicing plate for constant friction (third pressure plate),
320a Web (fourth press plate) in the third embodiment,
466 pressure plate (fifth pressure plate),
566 Pressure welding plate (6th pressure welding plate)

Claims (19)

A plurality of friction dampers are disposed between a pair of members that move relative to each other in a predetermined direction in a building frame, and the friction dampers suppress the relative movement by the frictional force between the pressure plates that slide with the relative movement. Is a vibration control structure that controls vibration in conjunction with each other,
The friction damper is
A first pressure contact plate provided on one member of the pair of members;
A second pressure contact plate provided on the other member of the pair of members;
With
The second pressure contact plate is provided with a long hole that allows a predetermined amount of movement to slide, and the first pressure contact plate to which the first friction damper is in pressure contact with the first friction damper is in contact with the first pressure contact plate. The vibration control structure is characterized in that the pressure contact plate is connected so as to be capable of relative movement with a movement amount shorter than the predetermined movement amount. The vibration damping structure according to claim 1,
The vibration damper includes a bolt member that passes through a through hole provided in the first pressure contact plate and the long hole provided in the second pressure contact plate. The vibration damping structure according to claim 1 or 2,
A connection long hole is provided in one of the first pressure contact plate in pressure contact with the first friction damper and the first pressure contact plate in pressure contact with the second friction damper, and the connection hole in the other. Is provided,
The first pressure contact plate with which the first friction damper is in pressure contact and the first pressure contact plate with which the second friction damper is in pressure contact are connected by a pin member that passes through the connection hole and the connection long hole. Damping structure characterized by being made. A vibration damping structure according to claim 3,
The vibration damping structure according to claim 1, wherein the pin member is movable in the relative movement direction in the connecting elongated hole. The vibration damping structure according to claim 1, wherein:
The first pressure contact plate with which the first friction damper is in pressure contact with the first pressure contact plate with which the second friction damper is in pressure contact with each other with respect to the direction of relative movement,
Either the first pressure contact plate with which the first friction damper is in pressure contact or the first pressure contact plate with which the second friction damper is in pressure contact is in pressure contact with the second pressure contact plate via a filler member. Damping structure characterized by A vibration damping structure according to any one of claims 1 to 5,
The length of the connecting long hole provided in any one of the first pressure contact plate with which the first friction damper is pressed and the first pressure contact plate with which the second friction damper is pressed A vibration damping structure characterized by being shorter than the length of the elongated hole provided in the second pressure contact plate. A vibration damping structure according to any one of claims 1 to 6,
A friction plate sandwiched between the first pressure contact plate and the second pressure contact plate;
A sliding plate fixedly provided on the surface of the second pressure contact plate and in contact with the friction plate;
A vibration control structure characterized by comprising: A vibration damping structure according to any one of claims 1 to 7,
The vibration-damping structure, wherein the second pressure contact plate is sandwiched between at least two first pressure contact plates. A vibration damping structure according to any one of claims 1 to 8,
A vibration damping structure comprising a plurality of at least one of the first friction damper and the second friction damper. A vibration damping structure according to any one of claims 1 to 9,
The second pressure-contact plate is at least one of an H-shaped steel web and a flange. A vibration damping structure according to any one of claims 1 to 10,
And a constant friction generating member that generates a constant friction force when the relative movement is performed. A vibration damping structure according to claim 11,
The constant friction generating member is
A third pressure plate provided on the one member;
A fourth pressure contact plate provided on the other member;
With
The third pressure contact plate includes a through hole,
The fourth pressure contact plate includes a long through hole in the predetermined direction;
A vibration damping structure comprising a bolt member provided by being inserted through the through hole of the third press contact plate and the through hole of the fourth press contact plate. A vibration damping structure according to claim 11 or claim 12,
A friction plate sandwiched between the third press contact plate and the fourth press contact plate;
A sliding plate fixedly provided on a surface of the fourth pressure contact plate and in contact with the friction plate;
A vibration control structure characterized by comprising: A vibration damping structure according to any one of claims 11 to 13,
In the friction damper and the constant friction force generating member, a member that generates a pressure contact force is a disc spring. A vibration damping structure according to any one of claims 1 to 14,
In one of the first friction damper and the second friction damper,
The through hole of the first pressure contact plate is a long hole that is long in the relative movement direction,
And a fifth pressure plate sandwiching the first pressure plate with the second pressure plate,
The fifth pressure contact plate has a through hole through which the bolt member is inserted.
Damping structure characterized by that. The vibration damping structure according to claim 15,
The long hole of the second pressure contact plate in one of the first friction damper and the second friction damper is the long hole of the second pressure contact plate in the other of the first friction damper and the second friction damper. Damping structure characterized by longer than. A vibration damping structure according to claim 15 or claim 16, wherein
In one of the first friction damper and the second friction damper,
A vibration damping structure comprising: a pipe member that is inserted through a long hole of the first pressure contact plate and a long hole of the second pressure contact plate while the bolt member is inserted inside. A vibration damping structure according to any one of claims 15 to 17,
A friction plate sandwiched between the fifth press contact plate and the first press contact plate;
A sliding plate fixedly provided on a surface of the first pressure contact plate and in contact with the friction plate;
A vibration control structure characterized by comprising: A vibration damping structure according to any one of claims 15 to 18,
In the other of the first friction damper and the second friction damper,
The through hole of the first pressure contact plate is a long hole that is long in the relative movement direction,
And a sixth pressure contact plate sandwiching the first pressure contact plate with the second pressure contact plate,
The sixth pressure contact plate has a through hole through which the bolt member is inserted.
Damping structure characterized by that.