JP2007177864A - Damping device for base isolation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damping device capable of generating small damping with respect to normal seismic ground motion and of damping and avoiding resonance of a base isolation target M easily generated by in particular, long-period seismic ground motion. <P>SOLUTION: This damping device is provided with a case main body 11 held in a support body 2 side; a moving reception member 12 energized by unidirectional movement of a base isolation table 1 and moved while engaged with the case main body 11; and a seismic ground motion damping mechanism 100 arranged between the moving reception member 12 and the case main body 11 and functioning so as to damp swing of the base isolation table 1 due to seismic ground motion EQ. The seismic ground motion damping mechanism 100 is provided with a pair of V-shaped mechanism parts 13 compressed when the moving reception member 12 is pressed and stretched when the moving reception member 12 is pulled; and with friction generating parts 14 for increasing friction when the respective V-shaped mechanism parts 13 are compressed and stretched. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a damping device for a seismic isolation system, and more particularly to a damping device for a seismic isolation system that can effectively protect a seismic isolation object from not only normal-period ground motion but also long-period ground motion.

Various types of horizontal seismic isolation devices (tables) have been put to practical use in order to protect seismic isolation objects such as precision equipment and arts and crafts from earthquake vibrations and falls. Examples of the horizontal seismic isolation device include a seismic isolation device using a spring element and a damping element such as a coil spring, laminated rubber, and a rolling bearing, and a seismic isolation device using a sliding bearing.
An analysis model of such a seismic isolation device is shown in FIG. In FIG. 11, the natural period of this seismic isolation device is approximately Tn = 2π√ (m / k) [seconds] when the damping ratio ζ (= c / 2√ (mk)) is about 0.2 or less. ]
Given in.

Here, m represents the total weight of the table plate and the device, k represents the spring constant, and c represents the damping constant.
In general, since the period of the dominant part of the earthquake acceleration is often about T = 0.2 to 1.0 [seconds], the natural period of the device-base isolation system is about Tn = 2 to 3 [seconds]. Further, if the damping ratio is set to about ζ = 0.1 to 0.2, the acceleration of the seismic isolation device is reduced to about 1/5 to 1/10 of the earthquake acceleration, and a great seismic isolation effect can be obtained.
However, unlike ordinary seismic waves, they may be subject to long-period seismic waves that sway slowly with a long period of several seconds to tens of seconds. If the period of slow shaking due to this long-period seismic wave is close to the natural period Tn of the device-isolation device system, the seismic isolation device resonates and the device shakes even more than the ground motion. In order to suppress this resonance, it is necessary to increase the damping ratio ζ.
Therefore, a seismic isolation device is required that generates a small attenuation for normal seismic motion and generates a large attenuation when the seismic isolation object is to shake greatly due to a long-period seismic motion.

As a conventional seismic isolation device, one having the following structure is disclosed. In other words, the seismic isolation object is supported so as to be movable in the horizontal direction on the support structure, and when the seismic isolation object moves in the horizontal direction, the restoring force mechanism does not move the seismic isolation object before moving it. Return to position. This restoring force mechanism has a cam member fixed to the seismic isolation object along the horizontal direction, a compression coil spring, and a moving element in contact with the cam member. The moving element is a compression coil spring. It is pressed against the cam member by force. When the seismic isolation object moves horizontally from the initial position, the compression coil spring is compressed, and the seismic isolation object can be returned to the original position by the reaction force (see, for example, Patent Document 1).
JP 2000-329188 A

However, in the above-described conventional example, due to the structure using the cam member and the moving element, the normal earthquake motion described above generates a small attenuation, and the device tends to shake greatly due to the long-period earthquake motion. Sometimes, there is a disadvantage that a large attenuation cannot be generated.
In ordinary seismic isolation devices, the damping ratio is generally relatively small and set to 0.1 to 0.2. On the other hand, a large damping force is required to reduce vibration in a device-isolation system that resonates in response to long-period seismic waves. Since the velocity of long-period seismic waves is very small, it is difficult in practice to obtain the above attenuation characteristics using a viscous attenuation method.
Here, the long-period component of this earthquake has become a problem recently, and no damping device for a seismic isolation system corresponding to this long-period component has been found at this time.

  Therefore, the present invention has been made to solve the above-mentioned problems, and generates a small attenuation for a normal period ground motion, and the seismic isolation object tends to shake greatly due to a long period ground motion. It is possible to generate a large attenuation when responding to the long-period component of the seismic wave, thereby providing a high seismic isolation effect during a normal earthquake and effectively suppressing the resonance of the seismic isolation object during a long-period earthquake. The object is to provide a damping device for a system.

  In order to achieve the above object, a damping device for a seismic isolation system according to the present invention has a function of being arranged between a seismic isolation object and a fixed object together with a spring mechanism to seismic seismic motion on the seismic isolation object. A case main body held on the fixed object side described above, and a movement receiving member that is equipped with the case main body and is urged by movement in one direction of the seismic isolation object to move. And a seismic motion attenuating mechanism that is disposed between the movement receiving member and the case main body and operates when the seismic isolation object sways due to seismic motion and functions to attenuate the sway. In addition, this seismic motion attenuation mechanism sets a small attenuation for the ground motion corresponding to a normal ground motion, and gradually increases the damping for the ground motion with a long period and a large amplitude. A damping function is provided as its basic configuration (claims 1 to 9).

  Therefore, according to this, for earthquake motions with a period of about 0.2 to 1 [seconds], it functions in the same way as other damping devices to attenuate them and shakes the seismic isolation object. Even if long-period ground motion arrives, the gradually hardening type variable damping function can effectively respond and effectively suppress the generation of the resonance state. Even if there is a change in the period and amplitude of the seismic motion, the abnormal vibration of the seismic isolation object can be suppressed by effectively responding to the seismic motion.

  Here, a pair of the above-mentioned seismic vibration attenuating mechanism branches the direction of movement of the movement receiving member described above at least one of the two directions in the direction intersecting the movement direction of the movement receiving member together with the movement pressing force. You may comprise by a V-shaped mechanism part and the sliding friction generation | occurrence | production part each equipped between the link connection part of this pair of each V-shaped mechanism part, and the case main body mentioned above. Here, the V-shaped mechanism portion may be only in one or the other direction (Claims 2 to 3).

  In this way, the vibration direction and the vibration force of the seismic motion applied to the seismic isolation object can be dispersed in one and the other two directions via the pair of V-shaped mechanism parts, and the vibration can be absorbed simultaneously. The sliding friction generating portion disposed between the link connecting portion of each pair of V-shaped mechanism portions and the case body can convert vibration energy of seismic motion into sliding friction and effectively absorb this, As a result, even if a long-period earthquake motion arrives, the occurrence of the resonance state can be effectively suppressed in response to this, and the link connecting portions of the V-shaped mechanism portions on one side and the other side can be reversed. At the same time, it is pushed and transferred toward the case body, so the sliding frictional forces of approximately the same magnitude are simultaneously applied to each of the two sliding friction generating portions that operate by receiving the pressing force of each link connecting portion at the same time. appear. For this reason, a stable sliding friction state in which the left and right are balanced can be realized, and a sliding friction force can be efficiently generated.

The pair of V-shaped mechanism portions described above are compressed (narrowed) when the above-described movement receiving member is pressed against the case main body, and the above-mentioned movement receiving member is against the case main body. It may be configured and arranged so as to be expanded by being pulled.
If it does in this way, it will become possible to move so that the link connection part of each V-shaped mechanism part mentioned above may be pushed out toward the case body side, and it can transmit to a sliding friction generating part as a vibration pressing force, In the sliding friction generating portion, the moving pressing force of the link connecting portion is generated as a sliding friction force in the sliding friction generating portion between the case main body. As a result, the vibration energy of the seismic motion applied to the seismic isolation object can be converted into a sliding friction force and effectively absorbed by the sliding friction generating portion.

  Further, each of the pair of V-shaped mechanism portions described above is disposed in a V-shape between the aforementioned movement receiving member and the case main body (with the opening portions facing each other) and connected to each other so as to be rotatable. Each of the links, a moving pressing body rotatably mounted on the link connecting portion of each link, and each sliding pressing body in a direction intersecting the moving direction of the moving receiving member. It is good also as a structure provided with the guide member which guides simultaneously and separately moving to a dynamic friction generation | occurrence | production part respectively in the reverse direction (Claim 5).

In this way, the pressing force of the link connecting portion against the case main body is directed to the case main body via the moving pressing body, so that the sliding friction generating portion that receives this moves and presses the vibration pressing force of the earthquake motion described above. It can be efficiently received from the body, and each one and the other moving pressing body is simultaneously pressed and transferred toward the case main body in the opposite direction along the guide member. In the state where each movable pressing body is held by the guide member, the sliding frictional force having substantially the same magnitude is simultaneously generated at the two left and right positions.
For this reason, a stable sliding friction state in which the left and right are balanced can be realized, and a sliding friction force can be generated efficiently and stably.

Further, the sliding friction generating portion described above is provided at least in the protruding direction of the link connecting portion corresponding to the link connecting portion, and according to the degree to which the openings of the pair of V-shaped mechanism portions are compressed. The frictional force may be increased or decreased (claim 6).
In this way, the pressing force in the protruding direction of the link connecting portion that moves in the perpendicular direction increases as the opening portion of each V-shaped mechanism portion changes greatly from large to small (as the opening portion decreases), This increases the frictional force. Also at this point, the vibration pressing force (vibration energy of earthquake motion) is smoothly absorbed.

  Here, the above-described sliding friction generating portion is individually provided between one and the other link connecting portions of each V-shaped mechanism portion described above and the above-described case main body in the projecting direction of each link connecting portion. It is good also as a structure provided with each provided sliding friction generating part (outside sliding friction generating part) of the other.

  Further, the partition member for partitioning the space between the pair of V-shaped mechanism portions described above is disposed as a part of the case body corresponding to the opening portion of each V-shaped mechanism portion. The sliding friction generating portion described above is provided with one and the other provided between one of the V-shaped mechanism portions, the other link connecting portion, and the case body side ahead of the projecting direction of the link connecting portion. One provided between the first sliding friction generating part (outer sliding friction generating part) and each of the link connecting parts described above and the partition member on the opposite side of the projecting direction of each link connecting part. And the other second sliding friction generating part (inner sliding friction generating part) may be provided.

  Further, the V-shaped mechanism portions described above are arranged on the same plane, and the link connecting portions described above are moved between the link connecting portions and parallel to the arrangement surface of the V-shaped mechanism portions. There may be provided a (left and right) synchronous movement guide mechanism that guides the movement of the receiving member in directions opposite to each other in the direction intersecting the movement direction (left and right).

  Moreover, the damping device for a seismic isolation system according to the present invention is disposed between the seismic isolation object and the fixed object and has a function of attenuating seismic motion with respect to the seismic isolation object. A held case main body, a movement receiving member that engages with the case main body and moves by being biased by movement in one direction of the seismic isolation object, the movement receiving member, and the case main body; The first seismic motion attenuating mechanism and the second seismic motion attenuating mechanism are provided that function when the seismic isolation target is swayed by seismic motion and operates to attenuate the seismic motion.

  Further, each of the first and second seismic motion attenuation mechanisms described above is set to a small attenuation for the seismic motion corresponding to a normal seismic motion of about 0.2 to 1 [second], and has a long period and a large amplitude. For the seismic motion, a structure having a gradually-hardening type variable damping function for setting a large damping for the seismic motion is provided, and each seismic motion damping mechanism is sequentially arranged along the moving direction of the moving receiving member. When the movement receiving member moves in one direction due to the earthquake motion, the first ground motion attenuation mechanism described above exhibits a large attenuation function. When the movement receiving member moves in the other direction due to the earthquake motion, The seismic motion attenuating mechanisms are connected via a part of the movement receiving member so that the second seismic motion attenuating mechanism can exert a large damping function (claims 10 to 16).

  For this reason, according to the present invention, when earthquake motion arrives along the reciprocating direction of the movement receiving member described above, a large damping function is effective against long-period vibration in any of the reciprocating directions. Therefore, it is possible to effectively and reliably avoid the resonance destruction of the seismic isolation object that has conventionally occurred due to the long-period ground motion.

  Furthermore, each of the first to second seismic vibration damping mechanisms described above has at least one and the other two in the direction intersecting the moving direction of the moving receiving member together with the moving pressing force with respect to the moving displacement direction of the moving receiving member. A structure having a pair of V-shaped mechanism parts branched in the direction, and a sliding friction generating part individually provided between the link connecting part and the case body provided in each of the pair of V-shaped mechanism parts. And And a pair of each V-shaped mechanism part of each said earthquake-motion attenuation mechanism mentioned above is an edge part which adjoins the opening part side of each said V-shaped mechanism part arrange | positioned along the direction of the movement displacement of the said movement receiving member. May be connected to each other via a part of the movement receiving member so as to be rotatable with respect to each other (claim 11).

If it does in this way, the opening part of one (pair) V-shaped mechanism part will be expanded according to the direction of movement displacement, and the opening part of the other (pair) V-shaped mechanism part will be narrowed.
For this reason, the other V-shaped mechanism part whose opening is narrowed has its link connecting part projecting toward the corresponding sliding friction generating part while moving in the moving direction of the movement receiving member, and has a predetermined pressing force. Is transmitted to the sliding friction generating portion, and a large sliding friction force is generated in the sliding friction generating portion.

On the other hand, the frictional force of the V-shaped mechanism part with the widened opening gradually moves because the link connecting part moves away from the corresponding sliding friction generating part as the movement receiving member moves. To decrease.
Such a sliding frictional force is generated symmetrically along the moving direction of the movement receiving member. In addition, since the sliding frictional force is generated by the reciprocating movement of the movement receiving member, the pair of V-shaped mechanism portions of one and the other function alternately (see FIG. 10). Even in the case of a large earthquake motion, it is possible to reliably avoid the seismic isolation object from being in a resonance state by effectively responding under the same conditions in any of the reciprocating directions.

  Here, the pair of V-shaped mechanism portions constituting the first earthquake motion attenuation mechanism and the pair of V-shaped mechanism portions constituting the second earthquake motion attenuation mechanism are arranged on the same plane. The open end portions of the links located outside the V-shaped mechanism portions (upstream and downstream in the moving direction of the movement receiving member) are rotatably connected to the case main body portions located close to each other. (Claim 12).

  In this way, as the movement receiving member moves, the V-shaped mechanism portions arranged on the left and right have a fixed spatial distance in the case body along the moving direction of the movement receiving member. The opening of the pair of V-shaped mechanism portions is reliably expanded or narrowed with the movement of the movement receiving member. For this reason, the characteristic curve shown in FIG. 10 described above can be realized with certainty, and thus it is possible to reliably avoid the seismic isolation object from being in a resonance state.

Further, the link connecting portions of the pair of V-shaped mechanism portions arranged on the one side and the other side described above move in a direction crossing the moving direction of the moving receiving member described above and in opposite directions to each other. You may equip the synchronous movement guide mechanism which guides to do in parallel with the arrangement | positioning surface of each V-shaped mechanism part mentioned above (Claim 13).
In this way, since the reciprocating movement of each link connecting portion is smoothly guided by the synchronous movement guide mechanism, the meandering of each link connecting portion that is likely to occur due to the fluctuation of the sliding frictional force is effectively avoided, thereby There is an advantage that the sliding friction generating portion can be operated smoothly.

In addition, the V-shaped mechanism portions forming the pair are partitioned from each other, and a partition member forming a part of the case main body is arranged along the opening portion of each V-shaped mechanism portion at a predetermined interval. Two pieces are provided in parallel and spaced apart, and the main shaft portion of the movement receiving member is disposed between the two partition members. And the sliding friction generating part with which each said 1st thru | or 2nd seismic-motion attenuation | damping mechanism mentioned above is equipped, one each other link connection part which each said V-shaped mechanism part has, and the protrusion direction of each said link connection part You may make it comprise by one and the other each sliding friction generation | occurrence | production part each provided correspondingly between the case main bodies located previously (Claim 14).
In this way, the reciprocating movement of the movement receiving member can be set smoothly by the two partition members. For this reason, each V-shaped mechanism can be driven in a stable state. The protruding pressing force of each link connecting portion can be transmitted in a stable state, and in this respect, there is an advantage that the stable operation of one of the sliding friction generating portions on the other side can be ensured.

  Furthermore, a partition member that forms a part of the case main body and partitions the pair of V-shaped mechanism portions is provided along the opening portion of the V-shaped mechanism portions and at a predetermined interval from each other. The sliding friction generator is provided with the first and second seismic vibration attenuating mechanisms described above, in which the main shaft portion of the moving receiving member described above is disposed between the two partition members. , Each V-shaped mechanism part has one and the other link connecting part, and each of the first and the other first provided respectively between the case main body in the protruding direction of each link connecting part. Sliding friction generating portions, and one and the other second sliding friction generating portions provided between the link connecting portions and the partition member on the side opposite to the protruding direction of the link connecting portions. (Claim 15).

  In this way, the reciprocating movement of the movement receiving member can be smoothly guided by the two partition members, and the slide provided between the outer surface of the two partition members and each of the link connecting portions described above. The dynamic friction generating portion can be firmly held on the two partition members, and the sliding friction generating portion set inside the case main body in this respect can be a robust and durable sliding friction generating portion.

  Further, each sliding friction generating portion described above is fixedly attached to the case main body side corresponding to the link connecting portion of each pair of V-shaped mechanism portions described above, and each fixed friction plate is attached to each fixed friction plate. A sliding friction member arranged correspondingly and held on the link connecting portion side of each V-shaped mechanism portion via a guide member and movably toward each fixed friction plate, and a push of the link connecting portion. A pressing force urging member that is actuated by pressure and applies a moving pressing force from the moving receiving member to each of the corresponding sliding friction members may be configured.

  In this way, the pressing force urging member such as the coil spring functions effectively, and the fluctuation element is effectively absorbed with respect to the pressing force of the seismic motion transmitted through the link connecting portion described above. A stable seismic force with little fluctuation can be applied to each sliding friction generating portion described above, and the operation of the entire apparatus can be stabilized and the durability can be improved.

  Since the present invention is configured and functions as described above, according to this, since the seismic motion damping mechanism using friction and the gradually hardening type variable damping function is equipped, a small damping is obtained for normal seismic motion. When a seismic isolation object is about to shake greatly in response to long-period ground motion, it is possible to cope with long-period components of seismic waves by generating large attenuation, which is high for normal earthquakes. It is possible to provide an unprecedented excellent damping device for a seismic isolation system that exhibits a damping effect and can effectively avoid the occurrence of a resonance state even when a long-period ground motion comes.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a damping device for a seismic isolation system according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows an example of a damping device for a seismic isolation system according to the present invention equipped with a pair of V-shaped mechanism portions. FIG. 2 shows an example of a case where a seismic isolation device equipped with this damping device is installed on a seismic isolation object.

(Overall configuration)
A large damping force (frictional force) needs to be generated in order to reduce vibration in a seismic isolation system for a device that resonates in response to a long-period seismic wave. The velocity of long-period seismic waves is so small that it is difficult to use viscous damping. For this reason, in the present invention, the damping device 10 that enables damping of long-period ground motion using the friction damping method is realized as a main component of the seismic isolation system.

  The seismic isolation system damping device 10 positively utilizes frictional forces generated by a plurality of V-shaped link mechanisms and sliding friction generating parts, which will be described later, to provide a small damping force when vibration is small, and The characteristic of the gradually hardening non-linear friction damper (friction damping device) that gives a large damping force when the vibration is large is used. For this reason, this damping device 10 for a seismic isolation system can also be called a gradually hardening type friction damper or a gradually hardening type nonlinear friction damper.

  In FIG. 2 described above, for example, a precision device (hereinafter referred to as “device”) M which is a seismic isolation object is mounted on the seismic isolation table 1. The seismic isolation table 1 is held by a support body 2, and the support body 2 is fixed to a fixing portion 4 so as to receive horizontal seismic motion EQ. The fixed portion 4 is, for example, a floor of a building, and the support 2 is fixedly mounted on the fixed portion 4. The seismic isolation table 1 is slidably disposed on the support 2. The seismic isolation table 1 is connected to the support 2 on the right side and the left side in the drawing by one or a plurality of seismic isolation system damping devices 10. The seismic isolation system attenuating device 10 can effectively attenuate the horizontal ground motion EQ of the seismic isolation table 1 on which the device M is placed.

  1 and 3 show a specific example of the above-described damping device for seismic isolation system (hereinafter referred to as damping device) 10. 1 to 3, the damping device 10 is provided between the base isolation table 1 on which the base isolation object M is placed and the support 2 that is a fixed object (see FIG. 2).

  As shown in FIGS. 1 and 3, the damping device 10 is provided with a frame-shaped case main body 11 held on the support body 2 side, and is fitted through and engaged with a side central portion of the case main body 11. A movement receiving member 12 that is moved by being urged by movement in one direction of the seismic isolation table 1 and the seismic isolation table 1 disposed between the movement receiving member 12 and the above-described case body 11 is subjected to seismic motion EQ. And a seismic motion attenuating mechanism 100 which operates when the swinging occurs and functions to attenuate the swinging.

The seismic motion attenuating mechanism 100 sets a small attenuation for the seismic motion EQ corresponding to the seismic motion EQ having a normal period of about 0.2 to 1 [second], and a seismic motion EQ having a long period and a large amplitude arrives. Thus, when the seismic isolation object M is about to resonate, it is configured to have a gradually hardening type variable damping function for setting a large damping. The gradual hardening type variable damping function will be specifically described later (see FIGS. 5 and 10).
For this reason, according to this, the seismic motion EQ having a period of about 0.2 to 1 [second] that occurs on a daily basis functions in the same way as other damping devices to attenuate the seismic motion EQ to the seismic isolation object M. The vibration can be effectively suppressed, and even if the seismic motion EQ with a long period and large amplitude arrives at the same time or in succession, the gradual hardening type variable damping function effectively responds to the generation of the resonance state. Therefore, even if there is a change in the amplitude of the incoming seismic motion EQ, the abnormal vibration of the seismic isolation object M can be suppressed effectively corresponding to the seismic motion EQ.

  Here, the above-described seismic motion attenuating mechanism 100 receives a pair of movement receiving members 12 that are arranged on the same plane (divided into left and right) in response to the reciprocating movement along the central axis. Sliding friction generating portions 15 and 16 respectively provided between the V-shaped mechanism portions 13 and 14 and the link connecting portions 13a and 14a of the pair of V-shaped mechanism portions 13 and 14 and the case body 11 described above. , 17 and 18. As described above, the pair of V-shaped mechanism portions 13 and 14 indicate the direction of movement displacement of the movement receiving member 12 that first receives the movement of the seismic isolation table 1 by the seismic motion EQ, together with the movement pressing force, the movement receiving member. It has a function of branching in at least one and the other two directions in a direction crossing the 12 moving directions.

  In the present embodiment, the above-described sliding friction generating portions 15 and 16 are provided between the projecting direction ends of the link connecting portions 13a and 14a of the V-shaped mechanism portions 13 and 14 and the case main body 11 in the region corresponding thereto. In this respect, it is positioned as an outer sliding friction generating portion. On the other hand, as will be described later, the sliding friction generating portions 17 and 18 correspond to the opposite side of the projecting direction of the link connecting portions 13a and 14a of the V-shaped mechanism portions 13 and 14 in this embodiment. It is equipped between the case main body 11 of the area | region which carries out, and is positioned as an internal sliding friction generation | occurrence | production part in this point.

  As a result, the vibration direction and the vibration force of the seismic motion EQ applied to the seismic isolation object can be dispersed in one and the other two directions via the pair of V-shaped mechanism portions 13 and 14 to absorb the vibration. At the same time, the vibration energy of the seismic motion EQ is generated by the sliding friction generating portions 15, 16, 17, 18 disposed between the link connecting portions 13 a, 14 a of the pair of V-shaped mechanism portions 13, 14 and the case body 11. It can be effectively absorbed by converting to sliding friction. Furthermore, even if a seismic motion EQ having a long period and a large amplitude arrives, the occurrence of the resonance state can be effectively suppressed in response to this.

Further, since the link connecting portions 13a, 14a of the one and the other V-shaped mechanism portions 13, 14 are simultaneously pressed and transferred in the opposite direction toward the case body 11, the link connecting portions 13a, 14a In at least two sliding friction generating portions 15 and 16 that operate by receiving a pressing force at the same time, substantially the same sliding friction force is generated at the same time. For this reason, a stable sliding friction state in which the left and right are balanced is realized, and it is possible to efficiently generate the sliding friction force and suppress the occurrence of resonance due to the seismic motion EQ.
The pair of V-shaped mechanism portions 13 and 14 have their openings compressed when the movement receiving member 12 is pushed against the case main body 11 described above, and the above-mentioned movement receiving member serves as the case main body described above. It is comprised and arrange | positioned so that it may be expanded by being pulled with respect to 11. FIG.

  If it does in this way, the link connection parts 13a and 14a of each V-shaped mechanism part 13 and 14 mentioned above will be moved so that it may push out toward the case main body 11, and it will transmit to the sliding friction generating parts 15 and 16 as a vibration pressing force. In response to this, the sliding friction generating portions 15 and 16 generate the moving pressing force of the link connecting portions 13a and 14a as the sliding friction force at the sliding friction generating portions 15 and 16 between the case body 11. . As a result, the vibration energy of the seismic motion EQ applied to the seismic isolation object is converted into a sliding frictional force and is effectively absorbed by the sliding friction generating portions 15 and 16.

  Each of the pair of V-shaped mechanism portions 13 and 14 described above is disposed in a V shape between the movement receiving member 12 and the case body 11 (with the opening portions facing each other) and is mutually linked to the link connecting portion 13a. , 14a and two links 13A, 13B, 14A, 14B that are pivotably connected to each other, and the link pressing portions 13a, 14A, 14B of the links 13A, 13B, 14A, 14B, respectively, that are rotatably mounted. The body 21 and 22 and the moving pressing bodies 21 and 22 and the moving pressing body in a direction crossing the moving direction of the moving receiving member 12 and toward the sliding friction generating portions 15 and 16, respectively. Guide members 23 and 24 for guiding the individual movement in the reverse direction are provided.

  Here, the guide members 23 and 24 are constituted by cylindrical members, and are held by the above-described case main body 11 side so as to be able to reciprocate in accordance with the reciprocating movement direction of the movement receiving member 12 described above. Reference numerals 15C, 16C, 17C, and 18C denote support members as support mechanisms that support the guide members 23 and 24 so that they can reciprocate in the reciprocating direction of the movement receiving member 12 via sliding friction members 15B and 16B, which will be described later. Show.

In this way, the pressing force of the link connecting portions 13a, 14a against the above-described case main body 11 side is directed to the case main body 11 side via the movable pressing bodies 21, 22, so that the sliding friction generating portions 15, 16 receiving this are received. Then, the vibration pressing force of the above-described seismic motion EQ can be efficiently received from the moving pressing bodies 21 and 22, and the one and the other moving pressing body moving pressing bodies 21 and 22 are respectively guided along the guide members 23 and 24. Since they are simultaneously pressed and transferred in the opposite direction toward the case body 11, in the sliding friction generators 15 and 16 provided at the contact points with the case body 11, the movable pressing bodies 21 and 22 are guided members. The sliding frictional force of almost the same magnitude is generated simultaneously at the two left and right positions while being held at 23 and 24.
For this reason, it is possible to realize a stable sliding frictional force generation state balanced between the left and right, and to generate a sliding frictional force efficiently and stably, thereby effectively absorbing the vibration energy of the seismic vibration EQ. It has come to be able to do.

The sliding friction generating portions 15 and 16 described above are provided corresponding to the link connecting portions 13a and 14a at the projecting direction ahead of the link connecting portions 13a and 14a, and the pair of V-shaped mechanism portions 13 and 14 described above. The friction force is increased or decreased according to the degree to which the opening is compressed.
As a result, the component force of the pressing force in the protruding direction of the link connecting portion that moves in the perpendicular direction increases as the opening of each V-shaped mechanism portion 13, 14 greatly changes from large to small. The pressing force of the link connecting portions 13a and 14a is increased (as the opening is reduced), thereby increasing the frictional force. Also at this point, the vibration pressing force (vibration energy of earthquake motion) is converted into frictional force and absorbed smoothly.

  On the extension line in the reciprocating direction of the movement receiving member 12 described above, a central partition plate 11W that partitions the space between the pair of V-shaped mechanism portions 13 and 14 described above is provided. The central partition plate 11W protrudes as a part of the case body 11 from the rear frame plate 11B facing the front frame plate 11A of the case body 11 holding the movement receiving member 12 to the movement receiving member 12. Yes.

  And the above-mentioned sliding friction generation | occurrence | production part is the case main body 11 located in the protrusion direction direction of each link connecting part 13a, 14a of each V-shaped mechanism part 13 and 14, and each other link connecting part 13a, 14a. One and the other first sliding friction generating portions (outer sliding friction generating portions) 15 and 16 provided between the side surface frame plates 11C and 11D, the link connecting portions 13a and 14a and the links. One and the other 2nd sliding friction generating part (inner sliding friction generating part) 17 and 18 provided between the said center partition plate 11W on the opposite side to the protrusion direction tip of the connection parts 13a and 14a were provided. It has a configuration.

  Thereby, in this embodiment, when the movement receiving member 12 described above moves in the direction in which each link connecting portion 13a, 14a protrudes, the first sliding friction generating portion (outer sliding friction generating portion) 15 is obtained. , 16 function to absorb the energy of the earthquake motion due to the large sliding friction.

As described above, the pair of V-shaped mechanism portions 13 and 14 are respectively disposed at the left and right target positions with respect to the movement direction of the movement receiving member 12. The V-shaped mechanism portions 13 and 14 are arranged on the same plane in this embodiment. And between the movement press bodies 21 and 22 with which each link connection part 13a, 14a of each V-shaped mechanism part 13 and 14 was equipped, the said movement press body 21 and 22 are link connection parts 13a and 14a. And a synchronous movement guide mechanism 25 for guiding the movement in the opposite directions.
Therefore, even during the operation of each of the sliding friction generating units 15 to 18, the above-described moving pressing bodies 21 and 22 are held by the synchronous movement guide mechanism 25. In this case, the pressure is applied in a stable state. For this reason, each sliding friction generating part 15 thru | or 18 can continue operation | movement in the stable state.

  The outer sliding friction generating portions 15 to 16 described above are respectively provided on the side surface frame plates 11C and 11D of the case body 11 corresponding to the link connecting portions 13a and 14a of the pair of V-shaped mechanism portions 13 and 14, respectively. The fixed friction plates 15A and 16A that are fixedly mounted and the fixed friction plates 15A and 16A are arranged so as to face the fixed friction plates 15A and 16A, and are held by the guide members 23 and 24 so as to be movable toward the fixed friction plates 15A and 16A. The sliding friction members 15B and 16B and the link connecting portions 13a and 14a are actuated by the pressing force to apply and apply the moving pressing force from the movement receiving member 12 to the corresponding sliding friction members 15B and 16B. And pressing force urging members 23A and 24A composed of coil springs or the like.

  Similarly, the inner sliding friction generating portions 17 to 18 described above correspond to the link connecting portions 13a and 14a of the pair of V-shaped mechanism portions 13 and 14, respectively, of the central partition plate 11W of the case body 11. Fixed friction plates 17A, 18A fixed on both sides, and the guide members 23, 24 arranged to face the fixed friction plates 17A, 18A and move toward the fixed friction plates 17A, 18A. The sliding friction members 17B and 18B held by the link connecting portions 13a and 14a are actuated by the pressing force of the link connecting portions 13a and 14a, and the corresponding sliding friction members 17B and 18B move from the movement receiving member 12. It is constituted by pressing force urging members 23B and 24B composed of coil springs or the like for applying a pressing force.

  Therefore, the pressing force urging members 23A, 23B, 24A, 24B such as coil springs function effectively, and the vibration pressing force of the seismic motion EQ transmitted through the link connecting portions 13a, 14a described above is effective. Fluctuating elements are effectively absorbed, so that pressing force is applied to each sliding friction generating part in a stable form with little fluctuation, especially for seismic motion EQ that fluctuates greatly over a long period. The resonance of the object M can be suppressed, and the operation of the entire apparatus can be stabilized and the durability can be improved.

  This will be described more specifically below.

As described above, the damping device 10 is driven by the frame-shaped case main body 11 that is the main body, the movement receiving member 12 that inputs the seismic motion EQ from the seismic isolation object M side, and the movement receiving member 12. A pair of V-shaped mechanism portions 13 and 14 and sliding friction generating portions 15 to 18 that absorb seismic motion EQ sent through the V-shaped mechanism portions 13 and 14.
The case body 11 is for mechanically holding the movement receiving member 12, the pair of V-shaped mechanism portions 13 and 14, and the sliding friction generating portions 15 to 18, and for example, in the present embodiment, a rectangular frame ( A front frame plate 11A, a rear frame plate 11B, and side frame plates 11C and 11D.

  The case body 11 is fixed to the support 2 side in FIG. 1 by, for example, a rod end (not shown). Inside the case main body 11, a part of the movement receiving member 12, a pair of V-shaped mechanism parts 13 and 14, and sliding friction generating parts 15 to 18 are installed.

  The movement receiving member 12 is made of, for example, a rod-shaped member, has a rod end 12B at one end, and has one end of each of a pair of V-shaped mechanism portions 13 and 14 via a V-shaped mechanism connecting member 12F at the other end. The part side is connected. Reference numeral 12D denotes a column portion that forms the skeleton of the movement receiving member 12 and holds the V-shaped mechanism connecting member 12F. The V-shaped mechanism connecting member 12F is fixedly equipped with a column portion 12D at the center thereof, and a pair of V-shaped mechanism portions 13 and 14 for branching and transmitting the pressing force of the movement receiving member 12 to both left and right ends thereof. Each one end portion (the upper end portion in FIG. 3 on the opening side) is connected by a pin. On the other hand, the other end portions of the V-shaped mechanism portions 13 and 14 are rotatably connected and supported by pins to support members 41 and 42 provided on the rear frame plate 11B side. The rod end 12B is connected to the above-described seismic isolation table 1 in FIG. 1 by pin coupling. Thereby, when the movement receiving member 12 reciprocates on the central axis, the openings of the V-shaped mechanism portions 13 and 14 are simultaneously expanded or narrowed.

  The movement receiving member 12 is provided with a bearing portion 12C provided through the center portion of the front frame plate 11A in order to receive the compression and tension inputs from the device M and the seismic isolation table 1, and the bearing portion 12C is provided with the bearing portion 12C. The front frame plate 11A is held so as to be reciprocally movable along the input direction T. That is, the movement receiving member 12 can reciprocate along the input direction T with respect to the case body 11.

  Each of the pair of V-shaped mechanism portions 13 and 14 is disposed and held between an end portion of the movement receiving member 12 in the case main body 11 and the rear frame plate 11B of the case main body 11 with an opening facing each other. ing. The pair of V-shaped mechanism portions 13 and 14 are compressed by the above-described movement receiving member 12 being pushed into the case main body 11, and are stretched by the movement receiving member 12 being pulled out from the case main body 11.

  The first sliding friction generating portions (outer sliding friction generating portions) 15 and 16 described above are disposed on the side surface portions of the side frame plates 11C and 11D of the case main body 11, and a pair of V-shaped mechanism portions. Friction (damping force) is generated by the pressing force generated when 13 is compressed. The second sliding friction generating portions (outer sliding friction generating portions) 17 and 18 are provided on both side surfaces of the central partition plate 11W protruding from the central portion of the rear frame plate 11B of the case body 11 toward the inside. They are respectively arranged, and are configured to generate friction (damping force) by the pressing force generated when the pair of V-shaped mechanism portions 13 and 14 are extended.

Here, the pair of V-shaped mechanism portions 13 and 14 correspond to the first links 13A and 14A connected to the above-described movement receiving member 12 on the rear frame plate 11B side of the case main body 11, and correspond to the first links 13A and 14A. 11 and the second link 13B, 14B disposed on the rear frame plate 11B side, and the movable pressing bodies 21, 22 are connected to the connection points 13a, 14a of each link, respectively. Specifically, the first links 13A and 14A and the second links 13B and 14B are each composed of two link members in order to ensure compressive strength and tensile strength, and each of these first links 13A and 14A. The corresponding second links 13B and 14B are rotatably connected by pins via the movable pressing bodies 21 and 22 at connection points 13a and 14a of the links, respectively.
The movable pressing bodies 21 and 22 are sliders that can be individually moved on the above-described guide members 23 and 24 along the direction G intersecting (orthogonal to) the input direction T that is the moving direction of the movement receiving member 12. is there.

  Further, the second links 13B and 14B of the V-shaped mechanism portions 13 and 14 have fixed support pieces provided on the rear frame plate 11B, as described above, at the lower end of FIG. 41 and 42 are rotatably connected and held by pins, respectively. Here, the link connecting portions 13a and 14a of the V-shaped mechanism portions 13 and 14 respectively project toward the one and the other side frame plates 11C and 11D, and thereby the first links 13A and 14A Each of the second links 13B and 14B corresponding thereto constitutes a substantially V-shaped link mechanism.

  Next, the sliding friction generating portions 15 to 18 will be described.

FIG. 4 shows a cross-sectional structure including the sliding friction generating portions 14 to 18 as viewed from the FR-FR line in FIG.
As described above, the sliding friction generating portions 15 to 18 are arranged on the inner surfaces of one and the other side surface frame plates 11C and 11D of the case main body 11 and on both side surface portions of the central partition plate 11W of the case main body 11, respectively. Both have the same configuration.

  Of the sliding friction generating portions 15 to 18, the sliding friction generating portions 15 to 16 provided on the inner surface portions of one and the other side frame plates 11C and 11D of the case body 11 are a pair of V-shaped mechanism portions 13 and 14, respectively. Has a function of increasing friction when is compressed. That is, in this embodiment, the component force of the pressing force that compresses the openings of the V-shaped mechanism parts 13 and 14 functions more strongly in the protruding direction of the link connecting parts 13a and 14a as the opening becomes narrower. The coil springs 23A and 24A are strongly compressed, and a relatively large pressing force is applied toward the sliding friction generating portions 15 to 16.

  Further, the sliding friction generating portions 17 to 18 provided on both side portions of the central partition plate 11W have a function of increasing friction when the pair of V-shaped mechanism portions 13 and 14 are extended. . In this case, the component force of the tensile force that extends the openings of the V-shaped mechanism portions 13 and 14 functions on the side opposite to the protruding direction of the link connecting portions 13a and 14a, so that the coil springs 23B and 24B are appropriately controlled. Since the compression is performed, the pressing force generated thereby is applied to the sliding friction generating portions 17 to 18, and the sliding friction generating portions 17 to 18 generate a frictional force corresponding to the component force of the tensile force.

  As described above, the sliding friction generating portions 15 to 18 hold the fixed friction plates 15A, 16A, 17A, and 18A, the sliding friction members 15B, 16B, 17B, and 18B, and the sliding friction members 15B and 17B, respectively. One guide member 23, the other guide member 24 holding the sliding friction members 16B, 18B, and the pressing force of the link connecting portions 13a, 14a provided on the guide members 23, 24 described above are moved to the pressing body 21. , 22 and pressing force urging members 23A, 24A, 23B, 24B comprising coil springs individually applied to the sliding friction members 15B, 16B, 17B, 18B.

The fixed friction plates 15A, 16A, 17A, and 18A are plate-like members extending in the input direction T, and are fixed to the inside of the side frame plates 11C and 11D and to both surfaces of the central partition plate 11W, respectively. The sliding friction members 15B, 16B, 17B, and 18B are configured to move while in contact with the corresponding fixed friction plates 15A, 16A, 17A, and 18A during operation.
Here, the pressing force urging members 23A and 23B formed of one set of coil springs are provided on the guide member 23 corresponding to the sliding friction members 15B and 17B, respectively. Further, the pressing force urging members 24A and 24B composed of the other set of coil springs are mounted on the guide member 24 corresponding to the sliding friction members 16B and 18B, respectively.

  The pressing force urging members 23A and 24A increase the friction by pressing the sliding friction members 15B and 16B against the corresponding fixed friction plates 15A and 16A, respectively, when the pair of V-shaped mechanism portions 13 and 14 are compressed. The pressing force urging members 23B and 24B increase the friction by pressing the sliding friction members 17B and 18B against the corresponding fixed friction plates 17A and 18A, respectively, when the pair of V-shaped mechanism portions 13 and 14 are extended.

  The sliding friction members 15B, 16B, 17B, and 18B described above are brake shoes, and the corresponding fixed friction plates 15A, 16A, 17A, and 18A provided on the case body 11 side of the sliding friction members 15 They are arranged relatively long in the direction parallel to the input direction T, and each length is the same. Here, at the lower ends of the fixed friction plates 15A, 16A, 17A, 18A in FIG. 4, the sliding friction members 15B, 16B, 17B described above along the fixed friction plates 15A, 16A, 17A, 18A, respectively. Holding members 15C, 16C, 17C and 18C for holding 18B are fixedly equipped. Thereby, the stability of the operation | movement during sliding operation | movement of each sliding friction member 15B, 16B, 17B, 18B is ensured.

  Here, the surfaces of the fixed friction plates 15A to 18A described above are arranged in parallel along the moving direction of the moving receiving member 12 described above. Of these, the fixed friction plate 15A and the fixed friction plate 17A are provided so as to face each other, and the fixed friction plate 16A and the fixed friction plate 18A are provided so as to face each other.

Further, as shown in FIGS. 1 and 3 to 4, the guide members 23 and 24 described above are individually provided in the through holes provided in the movable pressing bodies 21 and 22, respectively. 21 and 22 are integrated with the above-described link connecting portions 13a and 14a on the guide members 23 and 24 so as to freely reciprocate.
Of the guide members 23 and 24, both ends of one guide member 23 are equipped with the above-described sliding friction members 15B and 17B, and both ends of the other guide member 24 are provided with the above-described sliding friction members. 16B and 18B are equipped. In this case, in the present embodiment, each sliding friction member 15B, 17B, 16B, 18B is fixed to both ends of the corresponding guide members 23, 24, but without being fixed so as not to be detached during operation. It may be simply engaged.

  As described above, there is a synchronization between the above-described moving pressing bodies 21 and 22 that guides the movement pressing bodies 21 and 22 to be biased by the link connecting portions 13a and 14a and move in opposite directions. A movement guide mechanism 25 is provided. This synchronous movement guide mechanism 25 regulates the movement range of the rod-shaped guide member 25A for guiding the movement pressing bodies 21 and 22 to move in the opposite direction and the movement pressing bodies 21 and 22 provided at both ends thereof. And stoppers 25B and 25C. Thereby, the movement pressing bodies 21 and 22 can prevent a change (rattle) in the direction along the input direction T, which is likely to occur when the moving pressing bodies 21 and 22 linearly move in directions opposite to each other, and realize a smooth linear movement. Is possible.

(Description of operation)
Next, the operation of the attenuation device 10 will be described.
2 is moved horizontally by the seismic motion EQ, and the movement receiving member 12 shown in FIGS. 1 and 3 is displaced by the load F by v and pushed in the compression direction T1 of the input direction T. The pair of V-shaped mechanism portions 13 and 14 are further compressed, for example, from their V-shaped intermediate positions. When the V-shaped mechanism parts 13 and 14 are compressed from the intermediate position in this way, the movable pressing bodies 21 and 22 are urged by the link connecting parts 13a and 14a and are guided to each other along the cross direction G by the guide members 23 and 24. Move up in the opposite direction.

  As a result, the pressing force urging members 23A and 24A press and transfer the corresponding sliding friction members 15B and 16B toward the corresponding fixed friction plates 15A and 16A to further press them. Such an operation occurs simultaneously while the sliding friction members 15B and 16B are moving in the same direction as the movement receiving member 12, and thereby the sliding friction members 15B and 16B corresponding to the fixed friction plates 15A and 16A. In the meantime, a sliding friction force corresponding to the magnitude of the pressing force is generated, and the energy of the seismic motion EQ input from the movement receiving member 12 is effectively absorbed. In this case, in the present embodiment, a relatively large sliding frictional force is generated as described above.

On the other hand, when the movement receiving member 12 is displaced by the load F, for example, by v and pulled in the direction T2 that is pulled with respect to the input direction T, first, the V-shaped mechanism parts 13 and 14 are pulled from the intermediate position. When the V-shaped mechanism portions 13 and 14 are pulled from the intermediate position, the movable pressing bodies 21 and 22 move in the direction of approaching each other along the intersecting direction G. As a result, the pressing force urging members 23B and 24B abut against the corresponding friction plates 17A and 18A corresponding to the corresponding sliding friction members 17B and 18B and further press.
Such an operation occurs simultaneously while the sliding friction members 17B and 18B are moving in the same direction as the movement receiving member 12 is moved, whereby the fixed friction plates 17A and 18A and the corresponding sliding friction members 17B and 18B are moved. In the meantime, a frictional force corresponding to the magnitude of the pressing force is generated, and the energy of the earthquake motion input from the movement receiving member 12 is effectively absorbed.

FIG. 5 shows an example of load-displacement characteristics of the damping device 10 when the initial angle θ ₀ between the link shown in FIG.
In FIG. 5, μ represents a friction coefficient between the sliding friction members 15B to 18B and the corresponding fixed friction plates 15B to 18B, and ks represents a spring constant of the pressing force urging members 23A, 24A, 23B, and 24B. F represents the force in the movement direction applied to the movement receiving member 12, and v represents the relative displacement in the movement direction of the movement receiving member 12 at that time. Furthermore, L represents the length of each link 13A, 14A, 13B, 14B.

FIG. 5 shows a non-dimensional relationship between F and v when the initial angle θ ₀ is 45 ° (see FIG. 9). When θ ₀ = 45 °, it is shown that the tension side can be extended to v / L = 0.59, and the compression side can be reduced to v / L = −1.41.

  As is clear from FIG. 5, in the damping device 10, the friction force decreases in the range where the amplitude is small (the displacement is small) (the equivalent damping ratio is small), and the friction increases as the amplitude increases (the displacement increases). It can be seen that it has characteristics of a gradually hardening type non-linear friction damper in which the force is large (the equivalent damping ratio is large). In the example of FIG. 5, a frictional force is set according to a pressing component force (component force toward the sliding friction generating portion) having a magnitude of vibration transmitted to the movement receiving member 12 (length L).

In addition, when the movement pressing force of the movement receiving member 12 applied to the open ends of the V-shaped mechanism portions 13 and 14 is constant, generally, when the V-shaped opening is large, the link connecting portions 13a and 14a are moved to the left and right. The moving pressing component force is small, and when the opening is small, the moving pressing component force to the left and right of the link connecting portions 13a and 14a is large.
On the other hand, the magnitude of the moving pressing force of the movement receiving member 12 varies depending on the magnitude of the vibration energy of the incoming earthquake motion EQ. For this reason, when the vibration energy of the seismic motion EQ is large, the moving force component to the left and right of the link connecting portions 13a and 14a increases correspondingly even when the V-shaped opening is large. It is clear that a large sliding frictional force is also generated in the sliding friction generating portions 17 to 18.

6 and 7 show modified examples of the above-described sliding friction generators 15 to 18.
The sliding friction generating portions 15 to 18 shown in FIG. 6 are provided with concave portions 15Aa to 18Aa along the moving direction of the sliding friction members 15B to 18B on the sliding surfaces of the above-described fixed friction plates 15A to 18A. The sliding friction members 15B to 18B described above are characterized in that they are configured to slide within 18Aa. Other configurations are the same as those in FIGS. 1 and 3 described above.
In this way, the holding members 15C to 18C in FIGS. 1 and 3 described above are not required, and sliding friction generating portions 15 to 18 that function in the same manner as when the holding members 15C to 18C are provided are obtained. In addition to increasing the contact area for causing friction, the sliding friction members 15B to 18B are also prevented from being displaced in the vertical direction in FIG. 6, so that the sliding operation is more stable and efficient. A dynamic friction generating part can be obtained.

Further, the sliding friction generating portions 15 to 18 shown in FIG. 7 are provided with protruding strip portions 15Ba to 18Ba along the moving direction on the sliding friction surfaces of the sliding friction members 15B to 18B, and the fixing portions described above corresponding thereto. The sliding surfaces of the friction plates 15A to 18A are provided with recesses 15Ab to 18Ab along the moving direction of the sliding friction members 15B to 18B, and the protrusions of the sliding friction members 15B to 18B described above are provided in the recesses 15Ab to 18Ab. 15Ba-18Ba is engaged, and this is characterized in that the sliding friction members 15B-18B are individually slid at the same timing. Other configurations are the same as those in FIGS. 1 and 3 described above.
Even in this case, it is possible to obtain an efficient sliding friction generating portion having stable operation and functioning equivalent to that of FIG.

[Other embodiments <equipped with two pairs of V-shaped mechanism parts>]

Next, another embodiment of the present invention will be described with reference to FIGS.
The other embodiments shown in FIGS. 8 to 10 function in the same manner as the above-described embodiment shown in FIGS. 1 and 3 is provided with a pair of V-shaped mechanism portions 13 and 14. It is characterized in that the two pairs of V-shaped mechanism portions 13, 14, 63, 64 are sequentially connected in series with the movement receiving member 12 being aligned along the moving direction thereof and the openings thereof being aligned inward.

This will be described below.
First, the overall contents will be described, and then the detailed configuration will be described. Here, the same reference numerals are used for the same constituent members as those in the embodiment shown in FIGS.
8 to 10, the damping device 60 is arranged between the seismic isolation object M and the fixed portion 4 and attenuates the seismic motion EQ transmitted to the above-described seismic isolation object M as in the case of FIG. 2. It has a function to let you.

The damping device 60 is engaged with a frame-like case main body 61 that is a main body held by the support body 2 on the fixed portion 4 side, and a side central portion of the case main body 61 (a central portion of the front frame plate 61A). And a movement receiving member 12 that is pierced and moved by being biased by a moving force in one direction of the seismic isolation table 1, and between the case main body 61 and the movement receiving member 12 in the case main body 61. The first seismic motion attenuating mechanism 101 and the second seismic motion attenuating mechanism 102 that operate when the seismic isolation table 1 described above is swayed by the seismic motion EQ and function to attenuate the sway as shown in FIG. And is configured.
Here, the first seismic vibration attenuating mechanism 101 has the same configuration as that of the seismic vibration attenuating mechanism 100 in FIG. 1 described above. Further, as described above, the second seismic vibration attenuating mechanism 102 has the same configuration and functions as the first seismic attenuating mechanism 101.

  Each of the first to second seismic motion attenuating mechanisms 101 and 102 sets a small attenuation for the seismic motion EQ corresponding to the seismic motion EQ having a normal period of about 0.2 to 1 [second], and has a long period amplitude. When the seismic isolation object M tries to resonate when large seismic motion arrives, it is provided with a gradually hardening type variable damping function that sets damping large. Each of the seismic motion attenuation mechanisms 101 and 102 having such a gradually hardening type variable attenuation function is sequentially arranged along the moving direction of the movement receiving member 12 described above. When the movement receiving member 12 moves in one direction due to the seismic motion EQ, the first seismic vibration attenuation mechanism 101 described above exhibits a large attenuation function, and the movement receiving member 12 moves in the other direction due to the seismic motion EQ. In this case, each of the seismic vibration attenuating mechanisms 101 and 102 is connected via a part of the movement receiving member 12 so that the second seismic vibration attenuating mechanism 102 can exert a large attenuation function.

  For this reason, according to this, the seismic motion EQ with a period of about 0.2 to 1 [seconds] functions in the same way as other damping devices regardless of the reciprocal direction. Can be effectively suppressed from being shaken to the seismic isolation object M. In addition, for seismic motion EQ with a long period and large amplitude, each seismic motion attenuating mechanism 101, 102 functions in the opposite direction in any of the reciprocal directions and can effectively exhibit a large damping function. For this reason, it is possible to effectively and reliably avoid the resonance destruction of the seismic isolation object that has conventionally occurred due to the long-period seismic vibration having a large amplitude.

  The second seismic vibration attenuating mechanism 102 is similar to the first seismic vibration attenuating mechanism 101 described above, and the direction of movement displacement of the movement receiving member 12 intersects the movement direction of the movement receiving member 12 together with the movement pressing force. A pair of V-shaped mechanism parts 63 and 64 branched in at least one of the two directions, the link connecting parts 63a and 64a provided in the pair of V-shaped mechanism parts 63 and 64, and the case body described above. 61, sliding friction generating portions 65 to 68, which are individually provided, respectively.

  The pair of V-shaped mechanism portions 13, 14, 63, 64 of the first to second seismic vibration damping mechanisms 101, 102 are arranged along the direction of movement displacement of the movement receiving member 12 described above. The adjacent end portions on the opening side of the V-shaped mechanism portions 13, 14, 63, 64 are connected to each other through a part of the movement receiving member 12 described above.

Therefore, when the mobile receiving member 12 moves in the T ₁ direction of movement displacement, each of the second ground motion damping mechanism 102 opening is widened in the V-shaped mechanism portions 13 and 14 of the first ground motion damping mechanism 101 The openings of the V-shaped mechanism parts 63 and 64 are narrowed (see FIG. 9). And each V-shaped mechanism part 63,64 in the 2nd seismic-motion-damping mechanism 102 with which the opening part was narrowed corresponds to the sliding part corresponding to moving the link connection part 63a, 64a in the moving direction of the said movement receiving member 12. A predetermined pressing force is transmitted to the sliding friction generators 65 to 66 by projecting toward the dynamic friction generators 65 to 66. For this reason, since a relatively large pressing force is transmitted, a large sliding friction force is generated in the sliding friction generating portions 65 to 66.

  On the other hand, the V-shaped mechanism portions 13 and 14 in the first seismic vibration attenuating mechanism 101 in which the opening portion is widened, the link connecting portions 13a and 14a are moving in the moving direction of the movement receiving member 12. The sliding friction generating portions 15 and 16 move away from the corresponding sliding friction generating portions 15 and 16 and abut against the corresponding sliding friction generating portions 17 and 18 on the opposite side, and the sliding friction generating portions 17 and 18 are generated by the pressing force generated in this direction. Functions to generate a predetermined sliding frictional force.

  In this case, in the second seismic vibration attenuating mechanism 102, the V-shaped mechanism portions 63 and 64 function effectively and simultaneously occur symmetrically along the moving direction of the movement receiving member 12 described above. In addition, such a sliding frictional force is generated when the first and second pair of V-shaped mechanism parts 13, 14, 63, 64 are alternately operated in the opposite directions by the reciprocating movement of the movement receiving member 12. Thus (see FIG. 10), it is possible to effectively cope with a reciprocating vibration having a large amplitude. Then, a large sliding frictional force is generated as shown in FIG. For this reason, it can avoid reliably that the seismic isolation object M will be in a resonance state.

The pair of V-shaped mechanism portions 13 and 14 constituting the first earthquake motion attenuation mechanism 101 and the pair of V-shaped mechanism portions 63 and 64 constituting the second earthquake motion attenuation mechanism 102 are In the embodiment, they are arranged on the same plane. In this case, the open ends of the links located outside the respective V-shaped mechanism portions 13, 14, 63, 64 (upstream side and downstream side in the movement direction of the movement receiving member 12) are close to each other in this embodiment. The case main body 61 is connected to the case main body 61 so as to be rotatable by pin coupling.
Here, the distance S between the portions of the openings of the V-shaped mechanism portions 13, 14, 63, 64 connected to the case main body 61 is determined by the front frame plate 61 </ b> A of the case main body 61 and the rear frame. It is regulated by the plate 61B and set to a certain distance.

  For this reason, along with the movement of the movement receiving member 12, the V-shaped mechanism parts 13, 14, 63, 64 arranged on the left and right are set to one of the V-shaped mechanism parts 13, 14 along the moving direction. Alternatively, since the openings 63 and 64 are reliably widened or narrowed, the above-described characteristic curve shown in FIG. 10 can be reliably realized, thereby effectively avoiding the seismic isolation object from being in a resonance state. can do.

  Further, the link connecting portions 13a and 14a of the pair of V-shaped mechanism portions 13 and 14 arranged on one side and the other side of the first seismic vibration attenuating mechanism 101 described above have the above-described FIG. A synchronous movement guide mechanism formed equivalent to the synchronous movement guide mechanism 25 in the embodiment is provided. Similarly, the link connecting portions 63a and 64a of the pair of V-shaped mechanism portions 63 and 64 disposed on one side and the other side of the second seismic vibration damping mechanism 102 are also shown in FIG. The synchronous movement guide mechanism 75 formed in the same manner as the synchronous movement guide mechanism 25 in FIG.

  For this reason, the link connecting portions 13a, 14a and 63a, 64a are guided by the synchronous movement guide mechanisms 25, 75 and reciprocate, so that the link connecting portions 13a, 14a that are likely to be generated due to fluctuations in sliding frictional force. 63a and 64a can be effectively avoided, which makes it possible to smoothly operate the above-described sliding friction generating portions 15 to 18 and 65 to 68 in a stable state.

  In the present embodiment (FIGS. 8 to 9), as described above, the V-shaped mechanism portions 13 and 14 or 63 and 64 arranged on the left and right sides form a pair. Two partition members 61E and 61F for partitioning the character-shaped mechanism portions 13, 14, 63 and 64 are provided. The two partition members 61E and 61F form a part of the case body 11 described above, and along the opening portions of the V-shaped mechanism portions 13, 14, 63, and 64, with a predetermined distance from each other. Equipped in parallel. The main shaft portion of the movement receiving member 12 described above is disposed between the two partition members 61E and 61F.

  Here, reference numerals 61G and 61H denote holding plates fixedly provided at both ends of the two partition members 61E and 61F described above. The holding plates 61G and 61H are disposed at the upper and lower end portions of the two partition members 61E and 61F in FIG. 8, and the upper and lower end portions of the V-shaped mechanism portions 13, 14, 63 and 64 described above in FIG. The end portions of the first links 13A and 14A of the V-shaped mechanism portions 13 and 14 and the second links 63B and 64B of the V-shaped mechanism portions 63 and 64 are individually rotatable via pins. Hold on. As shown in FIG. 8, the holding plate 61G is fixed and integrated with the front plate 61A of the case body 61, and the holding plate 61H is fixed and integrated with the rear plate 61B of the case body 61.

At the same time, the V-shaped mechanism sections 13, 14, 63, 64 have the sliding friction generating sections 15-16, 65-66 provided in the first to second seismic vibration damping mechanisms 101, 102 described above. Correspondingly between the one and the other link connecting portions 13a, 14a, 63a, 64a and the case body 11 side located in the protruding direction of each link connecting portion 13a, 14a, 63a, 64a, respectively. ing.
The V-shaped mechanism parts 13, 14, 63, 64 have the sliding friction generating parts 17-18, 67-68 provided in the first to second seismic vibration damping mechanisms 101, 102 described above. The outer side surfaces of the two partition members 61E and 61F located on the opposite side of the one and the other link connecting portions 13a, 14a, 63a and 64a and the projecting direction ends of the link connecting portions 13a, 14a, 63a and 64a. It is equipped correspondingly between each.

  Thereby, the reciprocating movement of the movement receiving member 12 can be smoothly guided by the two partition members 61E and 61F. For this reason, since each said V-shaped mechanism part 13,14,63,64 can be driven in the stable state, the sliding friction generating device can be driven in a state in which the protruding pressing force of each one and the other link connecting part is stable. Can be transmitted. Further, the sliding friction generating portions 17 to 18, 67 to 68 provided between the outer surfaces of the two partition members 61E and 61F and the link connecting portions described above are robust on the two partition members 61E and 61F side. Therefore, there is an advantage that it is possible to ensure the stability of the operation of the entire one and the other sliding friction generating portions described above.

  The sliding friction generating portions 15 to 18, 65 to 68 described above correspond to the link connecting portions 13a, 14a, 63a, and 64a of the V-shaped mechanism portions 13, 14, 63, and 64 described above. Fixed friction plates 15A to 18A and 65A to 68 fixedly mounted on the main body 11 side or on the two partition members 61E and 61F, respectively, are arranged corresponding to the fixed friction plates 15A to 18A and 65A to 68A. The V-shaped mechanism portions 13, 14, 63, 64 are connected to the link connecting portion side through the guide members 23, 24, 73, 74 and toward the fixed friction plates 15A-18A, 65A-68. The sliding friction members 15B to 18B, 65B to 68B held so as to be movable, and the respective sliding frictions that are actuated by the pressing forces of the link connecting portions 13a, 14a, 63a, and 64a. The pressing force urging members 23A, 24A, 23B, 24B, 73A, 74A, 73B, and 74B for applying the moving pressing force from the moving receiving member 12 to the members 15B to 18B and 65B to 68B are configured. .

  For this reason, the pressing force urging members 23A, 24A, 23B, 24B, 73A, 74A, 73B, and 74B such as coil springs function effectively and are transmitted via the link connecting portions 13a, 14a, 63a, and 64a. The fluctuation factor is effectively absorbed with respect to the pressing force of the incoming seismic motion EQ, and thereby the stable pressing force of the seismic motion EQ with less fluctuation is applied to each of the sliding friction generating portions 15 to 18, 65 to 68 described above. Therefore, the operation of the entire apparatus can be stabilized and the durability can be improved.

This will be described more specifically.
As described above, the damping device 60 in the other embodiment shown in FIGS. 8 and 9 includes the case main body 61, the movement receiving member 12, the pair of first V-shaped mechanism portions 13 and 14, and the other pair. It has 2nd V-shaped mechanism parts 63 and 64, the 1st sliding friction generating part 15 thru | or 18, and the 2nd sliding friction generating part 65 thru | or 68.
Here, the pair of first V-shaped mechanism portions 13 and 14 and the first sliding friction generating portions 15 to 18 constitute the first seismic vibration damping mechanism 101, and the second V-shaped mechanism portions 63 and 64. A second seismic attenuation mechanism 102 is configured by the second friction generating portions 65 to 68.

  The case body 61 described above is a rectangular frame, and includes a front frame plate 61A, a rear frame plate 61B, and side frame plates 61C and 61D. A rod end 12H is fixed to the rear frame plate 61B. Inside the case body 61, a part of the movement receiving member 12, a pair of first V-shaped mechanism parts 13 and 14, another pair of second V-shaped mechanism parts 63 and 64, and a first sliding member Dynamic friction generating portions 15 to 18 and second sliding friction generating portions 65 to 68 are provided.

  One end of the movement receiving member 12 is provided with a rod end 12B, and the other end of the movement receiving member 12 is equipped with a driving plate 12G as a driving member. The movement receiving member 12 is held by the bearing portion 12 </ b> C of the case main body 61 so as to be capable of reciprocating along the input direction T. The drive plate 12G is configured to be capable of reciprocating along the input direction T. The drive plate 12G is provided with projecting portions 12Ga and 12Gb for connecting the opening end portions located at the central portions of the V-shaped mechanism portions 13, 14, 63 and 64 described above in the left-right direction in FIG. .

In addition, the movement receiving member 12 receives the movement of the seismic isolation table 1 on which the device M as the seismic isolation object with respect to the case body 61 and the device M are moved in the same manner as in FIG. It is pushed along T1 or pulled along the pulling direction T2.
As described above, the first ground motion attenuation mechanism 101 is formed exactly the same as the ground motion attenuation mechanism 100 in the embodiment of FIG. The pair of V-shaped mechanism portions 13 and 14 constituting the main part are arranged between the movement receiving member 12 and the case main body 61 in the case main body 61, and the movement receiving member 12 is compressed with respect to the case main body 61. The movement receiving member 12 is compressed by being pushed along the direction T <b> 1 and is stretched by being pulled along the pulling direction T <b> 2 with respect to the case body 61.

  Furthermore, as described above, the second ground motion attenuation mechanism 102 is configured in the same manner as the first ground motion attenuation mechanism 101. The pair of V-shaped mechanism portions 63 and 64 constituting the main part are disposed between the movement receiving member 12 and the case main body 61 in the case main body 61 so that the movement receiving member 12 is compressed against the case main body 61. The movement receiving member 12 is stretched by being pushed along the direction T <b> 1 and is compressed by being pulled along the pulling direction T <b> 2 with respect to the case main body 11.

  Here, the pair of V-shaped mechanism parts 63 and 64 constituting the main part of the second seismic vibration attenuating mechanism 102 is a first link connected to the aforementioned movement receiving member 12 on the rear frame plate 11B side of the case body 61. 63A, 64A and second links 63B, 64B corresponding to this and disposed on the rear frame plate 11B side of the case main body 61. The connecting points 63a, 64a of the links are respectively connected to the moving pressing bodies 71, 72 are connected.

Specifically, each of the first links 63A and 64A and the second links 63B and 64B is configured by two link members (not shown) as in the case of FIG. 1 in order to secure compressive strength and tensile strength. The first links 63A and 64A and the corresponding second links 63B and 64B are rotatable at the connecting points 63a and 64a of the links by pins via the movable pressing bodies 71 and 72, respectively. It is connected.
The movable pressing bodies 71 and 72 are sliders that can be individually moved on the above-described guide members 73 and 74 along the direction G intersecting (orthogonal to) the input direction T that is the moving direction of the movement receiving member 12. It has the function of.

  The second links 63B and 64B of the V-shaped mechanism portions 63 and 64 are fixed to the rear frame plate 61B with the end on the rear frame plate 61B side of the two ends on the opening side. Each of the support pieces 90 is rotatably connected and held by a pin. Here, the link connecting portions 63a and 64a of the V-shaped mechanism portions 63 and 64 are respectively provided so as to project toward the one and the other side frame plates 61C and 61D, thereby the first link 63A (64A). The second link 63B (64B) constitutes a substantially V-shaped link mechanism.

  As described above, the first seismic motion attenuating mechanism 101 has the same configuration as the seismic motion attenuating mechanism 100 in the embodiment of FIG. 1, and the first to second sliding friction generators 15 to 15 formed in the same manner. 18 is provided. Further, as described above, the second seismic motion attenuating mechanism 102 has the same configuration as the first seismic motion attenuating mechanism 101, and the first to second sliding friction generating portions 66 to 68 formed the same. It has.

Here, among the sliding friction generating portions 15 to 18 in the first ground motion damping mechanism 101 described above, in the first sliding friction generating portions 15 and 16, the pair of V-shaped mechanism portions 13 and 14 are compressed and the opening portions are compressed. When becomes small, the pressing force increases and the frictional force increases. At the same time, in the second sliding friction generating portions 17 and 18, when the pair of V-shaped mechanism portions 13 and 14 are stretched and the opening is enlarged, the pressing force is small and the frictional force is small.
Similarly, the sliding friction generating portions 65 to 68 in the second seismic vibration attenuating mechanism 102 described above also have openings in the first sliding friction generating portions 65 and 66 that are compressed by the pair of first V-shaped mechanism portions 63 and 64. When it becomes smaller, the pressing force increases and the frictional force increases. At the same time, when the second sliding friction generating portions 67 and 68 are stretched and the opening is enlarged, the pressing component force is small and the frictional force is small.
In the present embodiment, the first to second seismic vibration attenuation mechanisms 101 and 102 correspond to the reciprocating motion of the movement receiving member 12 as described above, and the first seismic vibration attenuation mechanism 101 and the second seismic vibration attenuation mechanism. Since the mechanisms 102 are configured to operate alternately in opposite directions, they are superposed at the same timing, so that the above-described characteristic function of FIG. 10 can be exhibited.

[Operation of Other Embodiments]
Next, the operation of the above-described attenuation device 60 will be described.
2 is moved horizontally by the seismic motion EQ, and the movement receiving member 12 shown in FIGS. 8 and 9 is displaced by the load F by v and pushed in the compression direction T1 of the input direction T. 9, the second pair of V-shaped mechanism parts 63 and 64 (second seismic vibration damping mechanism 102) is compressed from the intermediate position, as shown by the change from the phantom line state to the solid line state in the analysis model of FIG. On the contrary, the first pair of V-shaped mechanism portions 13 and 14 (first seismic vibration attenuating mechanism 101) is pulled from the intermediate position.

  That is, the link connecting points 63a and 64a of the second pair of V-shaped mechanism parts 63 and 64 bulge outward by the displacement u and compress the outer pressing force urging members 73A and 74A. In this case, as the size of the opening portion decreases, the pressing force applied to the link connecting points 63a and 64a increases, and as a result, the frictional force increases in the sliding friction generating portions 65 and 66 located outside. .

  On the other hand, in the first pair of V-shaped mechanism portions 13 and 14 that operate simultaneously, the link connecting points 13a and 14a move inward to compress the inner pressing force biasing members 73B and 74B. In this case, the first pair of V-shaped mechanism portions 13 and 14 are in an open state, and the pressing force transmitted to the link connection points 13a and 14a is relatively small. For this reason, a frictional force corresponding to this is generated in the inner sliding friction generating portions 17 and 18 (see the characteristic curve in FIG. 5).

Further, when the movement receiving member 12 shown in FIGS. 8 and 9 is displaced by the load F by v and pulled in the pulling direction T2 in the input direction T, contrary to the case shown in the analysis model of FIG. Although the V-shaped mechanism parts 63 and 64 are pulled from the intermediate position, the first V-shaped mechanism parts 13 and 14 are pushed from the intermediate position and compressed.
That is, the link connection points 13a and 14a of the first V-shaped mechanism portions 13 and 14 bulge outward and move by the displacement u. In this case, when the size of the openings of the V-shaped mechanism portions 13 and 14 is reduced, a large pressing component force is converted and output to compress the outer pressing force urging members 13A and 14A. As a result, the sliding frictional force of the outer sliding friction generating portions 15 and 16 inevitably increases.

  On the other hand, in the 2nd V-shaped mechanism parts 63 and 64 which operate | move simultaneously, the link connection points 63a and 64a will move inside, and will be in the state which opened the opening part (not shown). When the opening is open, the corresponding inner sliding friction generating portions 67 and 68 generate frictional force in a relatively weak state (a state where the pressing component force is small) as described above.

  In general, as described above, the first seismic motion attenuating mechanism 101 and the second seismic motion attenuating mechanism 102 are alternately turned in opposite directions in response to the reciprocating motion of the movement receiving member 12 as described above. Since they are configured to operate, they are polymerized at the same timing, so that the characteristic function of FIG. 10 described above can be exhibited.

  FIG. 10 shows an example of load-displacement characteristics of the damping device 60 when the initial angle θ between the first link 13A (or 63A) shown in FIG. 9 and the reciprocating direction of the movement receiving member 12 is 60 °. Show. 10, μ indicates a friction coefficient between the sliding friction members 15B to 18B, 65B to 68B and the corresponding fixed friction plates 15A to 18A, 65A to 68, and ks represents a pressing force biasing member 23A, The spring constants of 24A, 23B, 24B, 73A, 74A, 73B, and 74B are shown.

  As is clear from FIG. 10, in the damping device 60, the frictional force is small (the equivalent damping ratio is small) in the range where the amplitude is small, and the frictional force is increased (the equivalent damping ratio is large) as the amplitude is increased. It can be seen that it has such a characteristic of gradually hardening type nonlinear friction damper. In addition, in the example of FIG. 10, there is an advantage that the change characteristic of the resistance force due to the increase of the friction force is the same on the compression side and the tension side.

As described above, in each of the above-described embodiments, the structure is not simply a structure using a spring and a damper, but the friction and the force of the coil spring are used, and there is an advantage that no resonance occurs even when a long-period earthquake arrives. is there.
In this embodiment, a V-shaped link mechanism is used like a pantograph of a train, and the pressing movable body is branched and moved in the left-right direction according to the moving direction and moving amount of the movement receiving member 12 that is the input shaft. Thus, the present invention is characterized in that gradually changing frictional force is obtained by changing the change of the moving distance of the moving body into the change of frictional force.

Here, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the claims. For example, the damping device according to the present invention can also be used for a seismic isolation table using, for example, an XY table or a seismic isolation table using a semicircular spring.
Furthermore, in each of the above-described embodiments, a part thereof can be omitted or arbitrarily combined so as to be different from the above. In the illustrated example, the damping device 10 is used as a damper for the seismic isolation table 1 of the seismic isolation object M such as equipment as shown in FIG. The number and arrangement pattern of the attenuation devices 10 to be used can be arbitrarily selected according to the size of the building or the structure.

  Moreover, in each said embodiment, although the case where a pair of V-shaped mechanism part 13,14 or 63,64 was equipped on the same surface was illustrated, for example on the surface orthogonal to the equipment of FIG. 1 and FIG. Each of the other pair of V-shaped mechanism portions formed identically may be configured to be additionally equipped with 13, 14 or 63, 64.

Here, in each said embodiment, although the case where a pair of V-shaped mechanism part 13,14 or 63,64 was equipped on the same surface was illustrated, about V-shaped mechanism part, for example in embodiment of FIG. The seismic motion attenuating mechanism 10 may be configured by only one V-shaped mechanism portion 13.
In each of the above embodiments, the guide members 23, 24, and 73, 74 are separately provided on the left and right, but one guide member 23 (73) and the other guide member 24 (74) are provided. May be configured to pass through the central partition plate 11W (partition members 61E and 61F) and be connected to the left and right. In this way, balance adjustment during operation is facilitated, and the operation of the entire apparatus can be further stabilized.

〔Example of use〕
This is shown in FIG.
In the embodiment shown in FIG. 1 described above, when the movement receiving member 12 moves in the pulling direction, the pressing force is small, so the sliding frictional force is small. Therefore, in the embodiment of FIG. 1, for example, as shown in FIG. 11, when a plurality of damping devices 10 are arranged in the reverse direction and the above-described movement receiving member 12 is connected to the seismic isolation table 1 </ b> E, Thus, the attenuation device 10E that functions in the same manner as the attenuation device 60 of FIG. 8 can be obtained. In FIG. 11, reference numeral 1w indicates a holding means for holding the seismic isolation table 1E in a movable manner.

[Modification]
This is shown in FIG.
The modification of the attenuation device 70 shown in FIG. 12 is obtained by reversing the direction of the opposing positions of the first V-shaped mechanisms 13 and 14 in FIGS. Thus, the directions of the opposing positions of the second V-shaped mechanisms 63 and 64 are reversed. In accordance with the V-shaped mechanisms 13, 14, 63, and 64 in the opposite directions, the sliding members that function in the same manner as the aforementioned movement receiving member 12 and the sliding friction generating portions 15 to 18 and 65 to 68 in FIG. 8. It is characterized in that the dynamic friction generating portions 15 to 18 and 65 to 68 are equipped.

Here, reference numeral 71 indicates a case main body, reference numeral 71W indicates a central partition member, and reference numerals 71C and 71D indicate side surface frame plates. Reference numeral 25W denotes a moving receiver connected to the seismic isolation table, and reference numeral 71E denotes a fixed portion connecting arm for connecting to the fixed portion. Here, reference numerals 65C and 66C 67C 68C denote the sliding friction members 15B to 18B while allowing the sliding friction members 15B to 18B and 65B to 68B to reciprocate in the sliding friction generating portions 15 to 18, 65 to 68, respectively. The holding member holding 65B-68B is shown. Other configurations are the same as those of the other embodiments shown in FIGS.
Even in this case, it is possible to obtain the attenuation device 70 that functions substantially the same as the attenuation device 60 shown in FIGS. 8 to 9 described above.

[Application example]
For the seismic isolation system damping device 10, 10E, 60, 70 in each of the above-described embodiments, for example, the spring mechanism 80 is illustrated so as to maintain the above-described seismic isolation table 1 at a predetermined position in a normal state. When equipped as shown in Fig. 1, each of the damping devices 10, 10E, 60, 70 can be handled as a damping device having a seismic isolation function, that is, a seismic isolation device. In this case, the spring mechanism 80 may be provided outside the damping device or inside as shown in FIG. 2 and 11 show examples when the spring mechanism 80 is provided outside.

It is a perspective view which shows one Embodiment of this invention. It is explanatory drawing which shows the use condition of the attenuation apparatus concerning embodiment of FIG. It is a top view of the attenuation device shown in FIG. It is a fragmentary sectional view which shows the sliding friction generation | occurrence | production part seen from the FR-FR line | wire of the damping device shown in FIG. It is a diagram which shows the example of the load-displacement characteristic in embodiment of FIG. It is explanatory drawing which shows the other example of the sliding friction generation | occurrence | production part in embodiment of FIG. It is explanatory drawing which shows the further another example of the sliding friction generation | occurrence | production part in embodiment of FIG. It is a top view which shows other embodiment of this invention. It is explanatory drawing which shows the operation | movement change in embodiment of FIG. It is a diagram which shows the example of the load-displacement characteristic in other embodiment of FIG. It is explanatory drawing which shows the other usage example of the attenuation | damping apparatus in embodiment of FIG. It is explanatory drawing which shows the modification of the attenuation device in other embodiment of FIG. It is explanatory drawing which shows a prior art example.

Explanation of symbols

10, 10E, 60, 70 ... damping device 11, 61 ... case body 12 ... movement receiving member 13, 14, 63, 64 ... V-shaped mechanism 13A, 14A, 63A, 64A ... first link 13B , 14B, 63B, 64B... Second links 13a, 14a, 15a, 16a... Link connecting portions 15 to 18, 65 to 68... Sliding friction generating portions 15A to 18A, 65A to 68A. 18B, 65B to 68B ... sliding friction members 21, 22, 71, 72 ... pressing moving bodies 23, 24, 73, 74 ... guide members 23A, 23B, 24A, 24B, 73A, 73B, 74A, 74B ... Pressing force urging members 61E, 61F... Partition member (forms a part of the case body)
80... Spring mechanism 100... Seismic vibration damping mechanism 101... First seismic vibration damping mechanism 102.

Claims (16)

A damping device for a seismic isolation system, disposed between a seismic isolation object and a fixed object, for attenuating seismic motion on the seismic isolation object,
A case main body held on the fixed object side; a movement receiving member that is engaged with the case main body and moves by being urged by movement in one direction of the seismic isolation object; and the movement receiving member And a seismic motion attenuating mechanism that operates when the seismic isolation object is swayed by seismic motion and functions to attenuate the swaying, disposed between the case body and the case body,
This seismic motion attenuation mechanism has a gradually variable variable attenuation function that sets a small attenuation for the ground motion corresponding to a ground motion with a small amplitude, and a large attenuation for a ground motion with a long period and a large amplitude. A damping device for a seismic isolation system characterized by comprising. The damping device for a seismic isolation system according to claim 1,
A V-shaped mechanism portion that converts the direction of displacement of the movement receiving member into a direction that intersects the moving direction of the movement receiving member together with the movement pressing force, and a link of the V-shaped mechanism portion. A damping device for a seismic isolation system, characterized by comprising a sliding friction generating part provided between a connecting part and the case body. The damping device for a seismic isolation system according to claim 1 or 2,
A pair of V-shaped mechanism parts for branching the seismic motion attenuating mechanism in at least one and the other two directions in the direction intersecting the moving direction of the moving receiving member together with the moving pressing force of the moving receiving member. And a damping device for a seismic isolation system, characterized in that each of the pair of V-shaped mechanism portions includes a link connecting portion and a sliding friction generating portion provided between the case body. In the damping device for a seismic isolation system according to claim 2 or 3,
Each of the pair of V-shaped mechanism portions is expanded when the movement receiving member is pressed against the case main body, the opening thereof is compressed, and the movement receiving member is pulled against the case main body. A damping device for a seismic isolation system, characterized by being configured as described above. In the damping device for a seismic isolation system according to claim 2, 3 or 4,
Each of the pair of V-shaped mechanism portions is disposed in a V shape between the movement receiving member and the case main body with the opening portions facing each other, and is rotatably connected to each other by a link connecting portion. Two links, a movable pressing body rotatably mounted on the link connecting portion of each link, and the movable pressing body that holds each movable pressing body and intersects the moving direction of the movement receiving member. A damping device for a seismic isolation system, characterized by comprising a guide member that guides the individual movement in the opposite direction toward each sliding friction generating portion. In the damping device for a seismic isolation system according to claim 2, 3, 4, or 5,
The sliding friction generating portion is provided at least ahead of the link connecting portion in the protruding direction so as to correspond to the link connecting portion, and the friction force according to the degree to which the openings of the pair of V-shaped mechanism portions are compressed. Damping device for seismic isolation system, characterized by functioning to increase or decrease. In the damping device for a seismic isolation system according to claim 2, 3, 4, or 5,
The sliding friction generating portion is connected to one of the V-shaped mechanism portions, one of the other link connecting portions, and one of the other sliding portions provided between the case main body in the protruding direction of the link connecting portions. A damping device for a seismic isolation system, characterized by comprising a dynamic friction generating part. In the damping device for a seismic isolation system according to claim 2, 3, 4, or 5,
A partition member for partitioning a space between the pair of V-shaped mechanism portions is disposed as a part of the case body corresponding to an opening portion of each V-shaped mechanism portion;
The sliding friction generating portion corresponds to each link connecting portion between one and other link connecting portions of each V-shaped mechanism portion and the case main body in the protruding direction of each link connecting portion. Corresponding to each link connecting part between one and the other first sliding friction generating part equipped individually, each link connecting part and the partition member on the opposite side of the projecting direction of each link connecting part A damping device for a seismic isolation system, characterized in that the damping device is constituted by one and the other second sliding friction generating portion that are individually equipped. The damping device for a seismic isolation system according to any one of claims 2 to 8,
The V-shaped mechanism portions are arranged on the same plane, and the link connecting portions are arranged between the link connecting portions and parallel to the arrangement surface of the V-shaped mechanism portions. A damping device for a seismic isolation system, comprising a synchronous movement guide mechanism that guides movement in opposite directions in a direction crossing a movement direction. A damping device for a seismic isolation system, disposed between a seismic isolation object and a fixed object, for attenuating seismic motion on the seismic isolation object,
A case main body held on the fixed object side; a movement receiving member that is engaged with the case main body and moves by being urged by movement in one direction of the seismic isolation object; and the movement receiving member A first ground motion attenuation mechanism and a second ground motion attenuation mechanism which are disposed between the case body and the case body and function when the seismic isolation object swings due to ground motion and act to attenuate the vibration. ,
Each of the first and second ground motion attenuation mechanisms sets a small attenuation for the ground motion corresponding to a normal period ground motion, and sets a large attenuation for the ground motion for a long cycle and a large amplitude. In addition to the configuration having a gradually hardening type variable damping function, each seismic motion damping mechanism is sequentially arranged along the moving direction of the movement receiving member,
When the movement receiving member moves in one direction due to seismic motion, the first seismic motion attenuation mechanism exhibits a large damping function, and when the movement receiving member moves in the other direction due to seismic motion, the second A seismic isolation system damping device, wherein each of the seismic motion damping mechanisms is connected via a part of the movable receiving member so that the seismic motion damping mechanism can exhibit a large damping function. The damping device for a seismic isolation system according to claim 10,
Each of the first to second seismic vibration attenuating mechanisms branches the direction of movement of the movement receiving member in at least one of the two directions in the direction intersecting the movement direction of the movement receiving member together with the movement pressing force. A configuration including a pair of V-shaped mechanism portions, and a sliding friction generating portion individually provided between the link connecting portion and the case body included in each of the pair of V-shaped mechanism portions;
A pair of each V-shaped mechanism part of each said seismic-motion attenuation mechanism has the said adjacent edge part by the side of the opening part of each V-shaped mechanism part arrange | positioned along the direction of the movement displacement of the said movement receiving member. A damping device for a seismic isolation system, wherein the damping device is connected to each other through a part of the members so as to be freely rotatable. The damping device for a seismic isolation system according to claim 11,
The pair of V-shaped mechanism portions constituting the first seismic vibration damping mechanism and the pair of V-shaped mechanism portions constituting the second seismic vibration damping mechanism are arranged on the same plane, and A damping device for a seismic isolation system, wherein the open ends of links located outside the V-shaped mechanism portion are rotatably connected to the case bodies located in proximity to each other. The damping device for a seismic isolation system according to claim 11 or 12,
Guiding the link connecting portions of the pair of V-shaped mechanism portions arranged on the one side and the other side to move in the direction crossing the moving direction of the movement receiving member and in the opposite directions. A damping device for a seismic isolation system, wherein the synchronous movement guide mechanism is arranged in parallel to the arrangement surface of each V-shaped mechanism portion. The damping device for a seismic isolation system according to any one of claims 11 to 13,
The partition members forming a pair of the V-shaped mechanism portions and the partition members forming a part of the case main body are parallel to each other along the opening portions of the V-shaped mechanism portions at a predetermined interval. Equipped with two,
While disposing the main shaft portion of the movement receiving member between the two partition members,
The sliding friction generating part provided in each of the first to second seismic vibration attenuating mechanisms includes one and the other link connecting parts of each V-shaped mechanism part and the projecting direction ahead of each link connecting part. A damping device for a seismic isolation system, characterized in that it is equipped as a sliding friction generating part on one side and the other side in correspondence with each case body. The damping device for a seismic isolation system according to any one of claims 11 to 13,
A partition member that forms a part of the case body and partitions the pair of V-shaped mechanism portions from each other along the opening portion of the V-shaped mechanism portions and in parallel with a predetermined interval therebetween. While equipped with two,
The main shaft portion of the movement receiving member is disposed between the two partition members,
The sliding friction generating portion provided in each of the first to second seismic vibration attenuating mechanisms includes one and the other link connecting portions of the V-shaped mechanism portions, and the projecting direction ahead of each link connecting portion. One and the other first sliding friction generating portions respectively provided between the case main body, the link connecting portions, and the partition members on the side opposite to the projecting direction of the link connecting portions; A damping device for a seismic isolation system, characterized in that it is constituted by one and the other second sliding friction generating portions provided between the two. In the damping device for a seismic isolation system according to any one of claims 2 to 15,
Each sliding friction generating portion is disposed to be fixed to the case main body corresponding to the link connecting portion of the V-shaped mechanism portion, and is disposed opposite to the fixed friction plate. A sliding friction member held movably toward the fixed friction plate via a guide member on the link connecting portion side of the V-shaped mechanism portion, and acted upon by being urged by the pressing force of the link connecting portion A damping device for a seismic isolation system, comprising: a pressing force urging member that applies a moving pressing force from the moving receiving member to the sliding friction member.

Images