JP2006329284A - Vibration-absorbing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a vibration-absorbing device with a vibration suppression property whose performance is the same or better than that of the conventional device without applying a load to surroundings. <P>SOLUTION: There is a cylindrical hollow portion 28 at the center of an outside laminated body 16 in the form that each of a plurality of elastically-deformable rubber rings 18 and plurality of metallic rings 20 for keeping rigidity is alternately arranged. Wires 22A, 24A whose cross-sectional shape are each rectangular are formed into elastically-deformable spiral members, while coil springs 22, 24 whose outer diameters are different from each other are arranged so as to be fitted into the hollow portion 28. Further, inside the hollow portion 28, an injectant 26 is arranged which can constrain the movement of each of the coil springs 22, 24 in the form that the springs coincide with deformation of the outside laminated body 16. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a seismic isolation device having vibration control characteristics equal to or higher than those of conventional ones without giving a load to the environment.

  2. Description of the Related Art Conventionally, seismic isolation devices are known that are arranged between a building and the ground that supports the building in order to reduce earthquake shaking. This seismic isolation device is composed not only of a laminated rubber obtained by laminating a rubber plate and a laminated plate, but also a damping alloy for suppressing vibration caused by shaking, and the combined action of these members. It reduced the shaking of the earthquake and made it difficult to transmit the shaking of the earthquake to the building side.

  However, lead materials are generally used as damping alloys for conventional seismic isolation devices from the standpoint of damping characteristics. However, as environmental considerations have become increasingly important in recent years, they should be replaced with other materials. Began to be considered.

For this reason, instead of using a damping material made of lead material, a structure in which a normal coil spring having a circular cross-sectional shape is inserted into a laminated rubber so as to obtain a sufficient damping effect and a damping force is generated. The following seismic isolation device of Patent Document 1 has been considered.
JP-A-11-270621

  From the above, it has become necessary to develop a damping alloy used in a seismic isolation device that has a damping characteristic equal to or higher than that of a conventional damping alloy without imposing a load on the environment. However, in the seismic isolation device of Patent Document 1 that employs a normal coil spring in which the cross-sectional shape of the wire is circular, a sufficient amount of attenuation cannot be obtained.

  Therefore, it is conceivable to increase the wire diameter, which is the diameter of the coil spring wire, in order to increase the amount of attenuation. However, if the wire diameter is simply increased, the rigidity becomes too high, and as a component of laminated rubber There was a possibility of destroying the laminated plate arranged on the outer peripheral side of the coil spring.

On the other hand, when a normal coil spring is adopted, the coil spring is deformed as a horizontal displacement is applied to the seismic isolation device. For example, in the first large displacement, a rotational force is generated in the laminated rubber and the coil spring is deformed. There was a possibility that would collapse. In other words, if the coil spring collapses and falls within the seismic isolation device due to a large displacement, the damping force generated by the seismic isolation device decreases, and as a result, stable damping performance cannot be maintained and sufficient damping effect is achieved. Has a disadvantage that cannot be obtained.
An object of the present invention is to provide a seismic isolation device having a vibration control characteristic equal to or higher than that of the conventional one without giving a load to the environment in consideration of the above facts.

The seismic isolation device according to claim 1 is an outer laminated body in which an outer elastic plate having elasticity and formed in a ring shape and an outer hard plate having rigidity and formed in a ring shape are alternately laminated. Body,
A coil spring that is disposed in the outer laminated body and is made of a plurality of metals each having a rectangular cross-sectional shape and different outside diameters;
An injection material that can be injected into the outer laminate to restrain the movement of each coil spring;
It is characterized by having.

The operation of the seismic isolation device according to claim 1 will be described below.
According to the seismic isolation device of this claim, the outer elastic plate having elasticity and formed in a ring shape and the outer hard plate having rigidity and formed in a ring shape are alternately stacked. Having an outer laminated body. Further, a plurality of coil springs made of metal each having a rectangular cross-sectional shape and having different outer diameters are arranged in the outer laminated body, and an injection material that can restrain the movement of each coil spring is provided on the outer side. The structure is injected into the laminate.

  In other words, in this claim, as the horizontal displacement is input to the seismic isolation device, each of the plurality of coil springs having a rectangular cross-sectional shape of the wire and having different outer diameters is displaced. Although it deforms in accordance with the input, at this time, the adjacent surfaces of the wire having a square cross-sectional shape come into contact with each other, so that the wires are restrained. Furthermore, the injection material injected into the outer laminate adheres to the inner peripheral surface of the outer laminate and the plurality of coil springs, respectively, so that the injection material restrains the movement of each coil spring along the deformation of the outer laminate. It also becomes. For this reason, not only the mutual wire rods of the coil springs are restrained, but also the injection material restrains the movement of each coil spring, so that the coil spring can be prevented from falling down.

  As a result, even if a large horizontal displacement is applied to the seismic isolation device, the coil spring is reliably prevented from being crushed, so that stable damping performance is exhibited even after repeated displacement, and the damping performance is kept stable. be able to. Therefore, according to the seismic isolation device according to the present claim, even when an earthquake occurs, only the combined action between the outer laminated body and the plurality of coil springs arranged in parallel with each other and elastically deformed respectively. In addition, the combined action between these and the injection material reliably reduces earthquake shaking, making it difficult to transmit earthquake shaking to the building.

  As described above, the seismic isolation device according to the present invention arranges a plurality of coil springs having different outer diameters in the outer laminated body, and restrains the movement of each coil spring. By injecting a possible injection material into the outer laminate, it becomes possible to obtain the above vibration suppression characteristics without using lead material, so it is equivalent to or better than conventional seismic isolation devices without causing environmental impact It came to have the damping characteristics.

The operation of the seismic isolation device according to claim 2 will be described below.
The present invention has the same configuration as that of the first embodiment and operates in the same manner, but further has a configuration in which hard urethane is used as the injection material. That is, in this claim, since the injection material is made of hard urethane having a relatively high elastic coefficient among synthetic resin materials but being hard and having a large amount of elongation, the restraining force on the coil spring is increased even when the amount of displacement is large. Thus, the coil spring can be more reliably prevented from being crushed.

The effect | action of the seismic isolation apparatus which concerns on Claim 3 is demonstrated below.
In this claim, it has the same configuration as in claim 1 and operates in the same way, but further, the inner peripheral surface of the outer laminated body is formed to be uneven according to the outer peripheral surface side shape of the plurality of coil springs. It has a configuration. That is, in this claim, the inner peripheral surface of the outer laminated body is formed in an uneven shape in conformity with the outer peripheral surface side shape of the coil spring, so that the outer peripheral side of the coil spring and the inner peripheral surface of the outer laminated body are engaged with each other. Accordingly, the coil spring can be prevented from being crushed by restraining the movement of the coil spring also by the inner peripheral surface of the outer laminated body.

The effect | action of the seismic isolation apparatus which concerns on Claim 4 is demonstrated below.
The present invention has the same configuration as that of the first embodiment and operates in the same manner, but further has a configuration in which a plurality of coil springs are coaxially combined and arranged in the outer laminated body. That is, since a plurality of coil springs are coaxially combined with each other and arranged in the outer laminated body, even in a small space in the outer laminated body, a coil spring having a relatively large spring constant is utilized to the maximum extent. A plurality of coil springs can be arranged, and as a result, more coil springs can be arranged in a space of the same volume.

  Since a plurality of coil springs are coaxially combined and arranged, the spring constant of each coil spring increases as the length of one coil spring decreases. Furthermore, by changing the number of coil springs to be superimposed, the apparent spring constant of the form in which the spring constants of the coil springs are added can be easily adjusted according to the required damping force.

The operation of the seismic isolation device according to claim 5 will be described below.
The present invention has the same configuration as that of the first embodiment and operates in the same manner, but further has a configuration in which the cross-sectional shape of the wire constituting the coil spring is a rectangle having a long side in the radial direction of the coil spring. is doing.

  In other words, by making the cross-sectional shape of the wire rod a rectangle whose long side is the radial direction of the coil spring, in particular, the adjacent surfaces of the wire rod having a cross-sectional shape of a rectangular shape are more reliably in contact with each other. The mutual wire rods of the coil springs are restrained and can prevent the coil springs from falling down more reliably.

The operation of the seismic isolation device according to claim 6 will be described below.
The present invention has the same configuration as that of the first embodiment and operates in the same manner, but further has a configuration in which the wire constituting the coil spring is formed of a twinned metal material. In other words, in this claim, as the wire constituting the helical coil spring that can be elastically deformed is formed of a twin metal material, pre-strain is applied to the twin metal material constituting the coil spring. Therefore, when a tensile force or shear force is applied, the spring constant becomes lower and the damping coefficient becomes higher than that of a simple twin alloy. It has characteristics.

The operation of the seismic isolation device according to claim 7 will be described below.
In this claim, it has the same structure as that of claim 6 and acts in the same way, but further, Cu—Al—Mn alloy, Mg—Zr alloy, Mn—Cu alloy, Mn—Cu—Ni—Fe alloy, Cu -Al-Ni alloy, Ti-Ni alloy, Al-Zn alloy, Cu-Zn-Al alloy, Mg alloy, Cu-Al-Co alloy, Cu-Al-Mn-Ni alloy, Cu-Al-Mn-Co alloy , Cu-Si alloy, Fe-Mn-Si alloy, Fe-Ni-Co-Ti alloy, Fe-Ni-C alloy, Fe-Cr-Ni-Mn-Si-Co alloy, Ni-Al alloy, SUS304 Any one of the above is used as a twinned metal material.

  In other words, any one of these metals is used as a twinned metal material for forming the wire constituting the coil spring, so that vibration suppression characteristics equal to or higher than those of conventional ones can be obtained without giving a load to the environment. The coil spring which has can be obtained more reliably.

  As described above, according to the above-described configuration of the present invention, there is an excellent effect that it is possible to provide a seismic isolation device having vibration control characteristics equal to or higher than those of the conventional one without giving a load to the environment.

  Embodiments of the seismic isolation device according to the present invention will be described with reference to FIGS. As shown in FIG. 1, the upper and lower portions of the seismic isolation device 10 according to the first embodiment of the present invention are constituted by connecting plates 12 and 14 each formed in a disc shape. The lower connecting plate 12 is in contact with the ground, and the upper connecting plate 14 is in contact with the lower part of the building.

  Between the pair of connecting plates 12 and 14, an outer laminated body 16 formed in a cylindrical shape with a cylindrical inner peripheral surface 16A having a cylindrical hollow portion 28 at the center is disposed. Has been. This outer laminated body 16 is made of a rubber rubber ring 18 which is an outer elastic plate which is formed in a ring shape and can be elastically deformed, and a metal which is an outer hard plate which is formed in a ring shape and maintains rigidity. The metal ring 20 has a structure in which a plurality of metal rings 20 are alternately arranged.

  On the other hand, the pair of connecting plates 12 and 14 are attached to the upper and lower ends of the outer laminated body 16 by vulcanization bonding, respectively, and the center of the pair of connecting plates 12 and 14 is stepped in the middle. Circular through holes 12A and 14A having a portion are formed. However, the lid member 32 having a size corresponding to the through holes 12A and 14A and having a flange on the outer peripheral side is fixed to the pair of connecting plates 12 and 14 by screwing with bolts 34, respectively. The through holes 12A and 14A are closed.

  In the cylindrical hollow portion 28 existing at the center of the outer laminate 16, a coil spring is formed by forming a wire rod 22A having a rectangular cross section with a twin metal material into a shape of a spiral coil spring that can be elastically deformed. It arrange | positions so that 22 may fit. Similarly, in the hollow portion 28 of the outer laminated body 16, a coil spring 24 in which a wire rod 24 </ b> A having a rectangular cross-sectional shape is formed of a twin metal material in the shape of a helical coil spring that can be elastically deformed is coaxial with the coil spring 22. Are arranged so as to be fitted together. However, the coil spring 22 and the coil spring 24 have different outer diameters, and the outer diameter of the coil spring 22 is larger than the outer diameter of the coil spring 24.

  In other words, in the present embodiment, the cross-sectional shapes of the wire rods 22A and 24A constituting the two coil springs 22 and 24, respectively, are rectangles having a long side in the radial direction R of the coil springs 22 and 24 in the quadrangular shape. . The Young's modulus of the wire rods 22A and 24A is, for example, about 47 GPa, and the pitches of the two coil springs 22 and 24 are considered to be substantially the same, but may be different from each other. .

  Further, in the hollow portion 28 of the outer laminated body 16, not only the two coil springs 22, 24, but also the rigid spring made of rigid urethane that can restrain the movement of the coil springs 22, 24 in a form along the deformation of the outer laminated body 16. An injection material 26 is injected and arranged.

  As described above, in the seismic isolation device 10 according to the present embodiment, the outer laminated body 16 that can be elastically deformed is coil springs 22 and 24 that are spirally formed so as to be elastically deformable by a twinned metal material, The structure is arranged in parallel. And the height in the free state of the coil springs 22 and 24 is made higher than the height of the outer side laminated body 16, and coil springs 22 and 24 are assembled | attached in the outer side laminated body 16 shown in FIG. In this state, the coil springs 22 and 24 are compressed by the lid member 32, and a pre-strain is applied to the coil springs 22 and 24.

  As shown in FIG. 2, the height H of the coil springs 22 and 24 incorporated in the seismic isolation device 10 is, for example, 65 mm, the outer diameter D1 of the coil spring 22 is, for example, 62 mm, and the outer diameter of the coil spring 24. D1 is set to 45 mm, for example, but the outer diameter ratio of these two coil springs 22 and 24 is considered to be appropriate in the range of about 5: 4 to 5: 2.5. The pitch P of the wire rods 22A and 24A constituting the coil springs 22 and 24 is 12 mm, for example, the plate width dimension D of the wire rods 22A and 24A is 12 mm, for example, and the plate thickness dimension T of the wire rods 22A and 24A is respectively For example, it is 4 mm.

  As a result, even when the maximum amount of displacement expected in the horizontal direction A occurs in the coil springs 22, 24, the surface of the wire rod 22A of the coil spring 22 and the surface of the wire spring 24A of the coil spring 24 adjacent to the wire rod 22A In contact with each other, the wire rods 22A and 24A come to be restrained.

Next, manufacture of the seismic isolation apparatus 10 which concerns on this Embodiment is demonstrated below.
When the seismic isolation device 10 is manufactured, first, two coil springs 22 and 24 each having a spiral shape and having different outer diameters are respectively manufactured by wire rods 22A and 24A each having a rectangular cross-sectional shape, and Mn-Cu- In the case of a Ni—Fe alloy, it is held at a temperature of about 850 ° C. for about 1 hour and then slowly cooled by air cooling. In the case of a Cu—Al—Mn—Co alloy, the temperature is about 900 ° C. for about 5 minutes. After being held, rapidly cooled and then reheated, held at 200 ° C. for about 15 minutes, and then cooled by air, whereby twin coil springs 22 and 24 can be obtained.

  Separately, an outer laminated body 16 formed by laminating a rubber ring 18 and a metal ring 20 is produced. At this time, a pair of connecting plates 12 and 14 are vulcanized above and below the outer laminated body 16. We will adhere and attach each. However, at this time, the outer laminated body 16 is produced so that the height of the outer laminated body 16 is lower than the height of the coil springs 22 and 24.

  Thereafter, the wire material 24A of the coil spring 24 having a smaller outer diameter than the coil spring 22 is screwed between the wire materials 22A of the coil spring 22 so that the wire material of the other coil spring is inserted between the wire materials 22A and 24A of the coil springs 22 and 24. The coil springs 22 and 24 in the combined state are inserted into the hollow portion 28 existing at the center of the outer laminated body 16 through the through hole 12A of the connecting plate 12.

  Then, with the lid 32 fixed to the connecting plate 12 by screwing, the fluid-like injection material 26 is injected into the hollow portion 28 as shown in FIG. After the injection material 26 is solidified in the buried state, the lid member 32 is screwed and attached to the connecting plate 14 to complete the seismic isolation device 10.

  At this time, the coil springs 22 and 24 formed higher than the height of the outer laminated body 16 are compressed so as to have the same height as the outer laminated body 16 as the lid 32 is screwed to the connecting plates 12 and 14. As a result, the coil springs 22 and 24 are compressed and pre-strained.

Next, the effect | action of the seismic isolation apparatus 10 which concerns on this Embodiment is demonstrated below.
According to the seismic isolation device 10 of the present embodiment, the metal ring 20 having a ring shape having rigidity and the rubber ring 18 having a ring shape having elasticity are alternately stacked. The outer laminated body 16 is formed.

  In addition, two coil springs 22 and 24 that are formed in a spiral shape that can be elastically deformed from a twinned metal material and have different outer diameters are coaxial with each other in the hollow portion 28 in the central portion of the outer laminate 16. The injection material 26 that is arranged in a shape and can restrain the movement of each of the coil springs 22 and 24 is injected into the outer laminate 16 and solidifies in a state of filling the gap. As shown in FIGS. 1 and 2, the cross-sectional shapes of the wire rods 22A and 24A constituting the coil springs 22 and 24, respectively, are rectangles having a long side in the radial direction R of the coil spring 22 in the quadrangular shape. .

  That is, in the present embodiment, as the displacement in the horizontal direction A is input to the seismic isolation device 10, the metal coil springs 22 and 24 in which the cross-sectional shapes of the wire rods 22A and 24A are rectangular match the input of the displacement. In this case, as shown in FIG. 3, since the adjacent surfaces of the wire 22A and the wire 24A having a rectangular cross section come into contact with each other, the wires 22A and 24A are in a restraining manner. . Further, the injection material 26 injected into the outer laminate 16 is bonded to the inner peripheral surface 16A of the outer laminate 16 and the two coil springs 22 and 24, respectively. It is also constrained to a shape that follows the deformation of the outer laminate 16.

  For this reason, according to the present embodiment, not only the mutual wire rods 22A and 24A of the coil springs 22 and 24 are restrained, but also the injection material 26 restrains the movement of the coil springs 22 and 24, thereby It will be possible to self-prevent 24 falls.

  As a result, even if a large horizontal displacement A is applied to the seismic isolation device 10, the coil springs 22 and 24 are not crushed. Can be kept stable. Therefore, according to the seismic isolation device 10 according to the present embodiment, even when an earthquake occurs, the composite between the outer laminated body 16 and the coil springs 22 and 24 that are arranged in parallel and elastically deformed in parallel with each other. In addition to the effective action, the combined action between these and the injection material 26 can surely reduce the shaking of the earthquake, making it difficult to transmit the shaking of the earthquake to the building side.

  As described above, the cross-sectional shapes of the wire rods 22A and 24A are rectangular, each having a long side in the radial direction of the coil springs 22 and 24, and the metal coil springs 22 and 24 having outer diameters different from each other are laminated outside. The seismic isolation device 10 according to the present embodiment having a structure in which an injection material 26 that can not only be arranged in the body 16 but also restricts the movement of the coil springs 22 and 24 is injected into the outer laminated body 16 is made of a lead material. Since the vibration damping characteristics as described above can be obtained without using them, the vibration damping characteristics are equal to or higher than those of the conventional seismic isolation device 10 without giving a load to the environment.

  Furthermore, in the present embodiment, since the two coil springs 22 and 24 are coaxially combined with each other and arranged in the outer laminated body 16, a small size in the hollow portion 28 in the central portion of the outer laminated body 16 is obtained. Even in a space, the coil springs 22 and 24 having a relatively large spring constant can be arranged using the space to the maximum. And since these two coil springs 22 and 24 are coaxially combined and arrange | positioned, as the wire length per one formed in the spiral shape of the coil springs 22 and 24 becomes short, each coil spring The spring constants 22 and 24 are also increased.

  On the other hand, in the present embodiment, as the wire rods 22A and 24A constituting the helical coil springs 22 and 24 that can be elastically deformed are formed of twin metal materials, the twin crystals constituting the wire rods 22A and 24A are formed. Since a pre-strain is applied to the metal material, the spring constant is lowered and the damping coefficient is increased when a tensile force or a shear force is applied, compared to a simple twin alloy. It has large damping characteristics equivalent to or better than damping alloys.

  In other words, when a stress is applied to the coil springs 22 and 24 from the outside, pre-strain is applied and deformation is already performed up to the point P in the region F1 where twin deformation occurs in the stress-strain curve of FIG. The coil springs 22 and 24 are deformed as indicated by an arrow E in a region F1 in which twin deformation occurs in a form that further increases twin deformation or decreases twin deformation.

  From this, by giving pre-strain to the twin coil springs 22 and 24, the spring constant is reduced, and the range surrounded by the hysteresis line F including the region F1 in the stress-strain curve of FIG. Can be made larger. As a result, effective and good vibration damping characteristics can be obtained.

  On the other hand, in the present embodiment, the injecting material 26 is made of hard urethane having a relatively high elastic coefficient among the synthetic resin materials but is hard and has a large amount of elongation, so that the binding force on the coil springs 22 and 24 is increased. Even when the amount of displacement is large, the coil springs 22 and 24 can be more reliably prevented from being crushed.

Next, a second embodiment of the seismic isolation device according to the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the member same as the member demonstrated in 1st Embodiment, and the overlapping description is abbreviate | omitted.
According to the seismic isolation device 10 of the present embodiment, as in the first embodiment, each is formed by wire rods 22A and 24A made of twinned metal material and having a rectangular cross-sectional shape, and the outer diameters are different from each other. The two coil springs 22, 24 are arranged coaxially with each other in the hollow portion 28 in the central portion of the outer laminate 16, and the injection material 26 is not only injected into the outer laminate 16. As shown in FIG. 6, the inner peripheral surface 16 </ b> A of the outer laminated body 16 is also formed in a concavo-convex shape in accordance with the outer peripheral surface side shape of the plurality of two coil springs 22, 24.

  That is, in the first embodiment, the two coil springs 22 and 24 and the injection material 26 are arranged in the hollow portion 28 of the outer laminated body 16, but in this embodiment, the coil spring is further provided. The portion corresponding to the coil spring 24 having a small outer diameter is spirally formed, for example, 7 mm higher than the portion of the inner peripheral surface 16A corresponding to the coil spring 22 having a large outer diameter so as to match the outer peripheral surface side shape of Now, the convex portion 16B protrudes toward the inner peripheral side.

  As described above, the inner peripheral surface 16A of the outer laminated body 16 is formed in a concavo-convex shape, so that in the present embodiment, it protrudes from the portion near the outer peripheral side of the coil spring 22 and the inner peripheral surface 16A of the outer laminated body 16. The convex portion 16B thus engaged is also engaged. As a result, the inner peripheral surface 16 </ b> A of the outer laminated body 16 can also restrain the coil springs 22, 24 from being crushed by restraining the movement of the coil springs 22, 24.

  Therefore, since the deformation of the coil springs 22 and 24 when the displacement in the horizontal direction A is input to the seismic isolation device 10 is also suppressed by the unevenness of the inner peripheral surface 16A of the outer laminate 16, the large displacement in the horizontal direction A The coil springs 22 and 24 can be more reliably prevented from being crushed even if is applied, and stable damping performance can be exhibited even after repeated displacement, and damping performance can be maintained more stably.

  From the above, according to the seismic isolation device 10 according to the present embodiment, not only can the earthquake vibration be reliably reduced by the combined action between the outer laminated body 16, the coil springs 22, 24, and the injection material 26, By forming the inner peripheral surface 16A of the outer laminated body 16 in a concavo-convex shape according to the outer peripheral surface side shape of the two coil springs 22 and 24, the outer peripheral surface of the coil springs 22 and 24 and the inner peripheral surface 16A of the outer laminated body 16 Meshes, making it difficult to transmit earthquake vibrations to the building. For this reason, as in the first embodiment, since the vibration damping characteristics as described above can be obtained without using a lead material, it is equal to or more than the conventional seismic isolation device 10 without giving a load to the environment. It came to have the damping characteristics.

Next, a third embodiment of the seismic isolation device according to the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the member same as the member demonstrated in 1st Embodiment, and the overlapping description is abbreviate | omitted.
The seismic isolation device 10 according to the present embodiment has the same structure as that of the first embodiment, but in this embodiment, the wire rods 22A, 24A, which are twin metal materials and have a rectangular cross-sectional shape, Three coil springs 22, 24, and 30 that are formed by 30 A and have different outer diameters are combined in a coaxial manner and overlapped in a hollow portion 28 that exists in the center of the outer laminate 16. It is arranged.

  That is, as the coil springs 30 having an outer diameter smaller than the inner diameter of the coil spring 22 and formed at substantially the same pitch as the coil spring 22 are arranged on the inner peripheral surface side of the coil spring 22 having a larger inner and outer diameter, three coil springs are arranged. It is set as the structure arrange | positioned in the hollow part 28 in the state which combined 24, 30 and 30 coaxially. And since the three coil springs 22, 24, 30 that are plural are coaxially combined with each other and arranged in the outer laminate 16, the small space in the outer laminate 16 is utilized to the maximum, The apparent spring constant can be increased.

  On the other hand, in each of the above embodiments, for example, a Cu—Al—Mn alloy, a Mg—Zr alloy, a Mn—Cu alloy, a Mn—Cu—Ni—Fe alloy, a Cu—Al—Ni alloy, a Ti—Ni alloy, Al -Zn alloy, Cu-Zn-Al alloy, Mg alloy, Cu-Al-Co alloy, Cu-Al-Mn-Ni alloy, Cu-Al-Mn-Co alloy, Cu-Si alloy, Fe-Mn-Si alloy , Fe-Ni-Co-Ti alloy, Fe-Ni-C alloy, Fe-Cr-Ni-Mn-Si-Co alloy, Ni-Al alloy, or SUS304 is used as a twinned metal material. It is possible.

  That is, any of these metals is used as a twinned metal material for forming the wire rods 22A, 24A, 30A constituting the coil springs 22, 24, 30 so that no load is imposed on the environment. In addition, a coil spring having a vibration damping characteristic equivalent to or higher than that of the prior art can be obtained more reliably.

  For example, when a manganese-based alloy such as an Mn—Cu alloy or an Mn—Cu—Ni—Fe alloy is used, it is held at a temperature of 800 ° C. to 930 ° C. for about 0.5 to 2 hours for 10 hours. And then slowly cooling for about 20 hours to obtain a twinned metal material.

  Also, Cu-Al-Mn alloy, Cu-Al-Ni alloy, Cu-Zn-Al alloy, Cu-Al-Co alloy, Cu-Al-Mn-Ni alloy, Cu-Al-Mn-Co alloy, Cu- When using a copper-based alloy such as Si alloy, hold at a temperature of about 900 ° C. for about 5 minutes to 1 hour, rapidly cool, then reheat to a temperature of about 200 ° C. for about 15 to 30 minutes By holding, a twinned metal material can be obtained.

Next, the deformation mechanism of the wire rods 22A, 24A, 30A constituting the coil springs 22, 24, 30 by using twin crystals will be described below.
Deformation starts as shown in FIG. 8B by applying stress from the lateral direction to the martensite phase in which the metal atoms shown in FIG. Further, when the stress continues to be applied, the shape is deformed as shown in FIG. In the state shown in FIG. 8C, the deformation amount of the dimension S is generated.

  On the other hand, in the general metal shown in FIG. 9A, the atoms are uniformly aligned, but when stress is applied from the lateral direction, the atoms are not aligned as shown in FIG. 9B. Occurs and a defect occurs. In other words, when a deviation occurs in the arrangement of atoms in a general metal, plastic deformation occurs. Therefore, once the state shown in FIG. 9B is reached, the state shown in FIG. 9A is not restored. .

  As described above, unlike a general metal, a twinned metal material starts deformation with a relatively small stress, but does not plastically deform even when deformed to the state shown in FIG. If the process is reversed, the state shown in FIG. Furthermore, by reducing the cross-sectional area of the twin metal material so that the deformation is generated from the stage where the stress applied to the whole is low, the spring constant of hysteresis in the stress strain curve applied to the entire is not increased.

Next, the results of tests in which the seismic isolation device of the example and the seismic isolation device of the comparative example are displaced in the horizontal direction will be described below while comparing the two.
First, as the seismic isolation device of the embodiment, not only the two coil springs 22 and 24 and the injection material 26 having different outer diameters are arranged in the outer laminated body 16, but the inner peripheral surface 16A of the outer laminated body 16 is also provided. The seismic isolation device 10 according to the second embodiment formed in an uneven shape was used as a sample.

  On the other hand, as a sample of the comparative example, the first comparative example is a seismic isolation device in which two coil springs are arranged in the outer laminated body but the outer diameters of the coil springs are the same as each other and the injection material 26 is not injected. As an example, a seismic isolation device in which not only the injection material 26 is not injected but also only one coil spring is disposed in the outer laminated body is used as a second comparative example.

  Moreover, the test result which measured the change of tan-delta by horizontally displacing the seismic isolation apparatus made into these samples in the range of about 100 to 200% is shown in the graph of FIG. In this case, in this graph, the embodiment is represented by a characteristic curve A, the first comparative example is represented by a characteristic curve B, the second comparative example is represented by a characteristic curve C, and the horizontal amount of the same amount as the height dimension of the coil spring. The characteristics were expressed with the displacement as 100% displacement.

  From the test results of FIG. 10, it can be confirmed that the value of tan δ is higher and the change of the value of tan δ is smaller in the example than in the first comparative example and the second comparative example. That is, since the value of tan δ is high and the change is small as described above, the example can be said to be a highly durable seismic isolation device compared to the first comparative example and the second comparative example.

  In the above embodiments, the number of coil springs is two or three. However, four or more coil springs may be used. Furthermore, in the above embodiment, a twinned metal material is used as the material of the wire constituting the coil spring, but other general metal materials may be used as the spring material.

  Further, in each of the above embodiments, a plurality of coil springs are coaxially combined with each other and arranged in the outer laminated body. Therefore, a plurality of coil springs having a relatively large spring constant can be arranged using the space to the maximum. As a result, more coil springs can be arranged in the same volume space. Furthermore, by changing the number of coil springs to be superimposed, the apparent spring constant of the form in which the spring constants of the coil springs are added can be easily adjusted according to the required damping force.

  On the other hand, in each of the above embodiments, the cross-sectional shape of the wire constituting the coil spring is a rectangle having the long side in the radial direction of the coil spring in the quadrangular shape. However, if the effect of the present invention is satisfied, the radial direction of the coil spring May be a rectangle having a short side, and the cross-sectional shape of the wire may be a square. Furthermore, since the cross-sectional shape of the wire constituting the coil spring is a quadrangle, the cross-sectional area of the innermost diameter portion where the amount of distortion of the coil spring is considered to be the largest is increased from that of the circular cross-section, thereby improving the strength of the coil spring. .

  On the other hand, although hard urethane was used as the injecting material 26 in each of the above embodiments, this hard urethane has characteristics such as a JIS-A hardness of about 95 and an elongation of about 370 (%). The NCO content is 6.0 to 6.4 (%), the viscosity is 300 to 600 (mPa.sec / 75 ° C), and the specific gravity is 1.05 to 1.09 (25/4 ° C). The product name H-295 (manufactured by Diachemical Co., Ltd.) is conceivable.

  Furthermore, the JIS-A hardness is about 99, the degree of elongation is about 310 (%), the NCO content is 7.4 to 7.9 (%), and the viscosity is 320 to 420 (mPa). The product name Coronate 6912 (manufactured by Nippon Polyurethane Industry Co., Ltd.), which is said to be .sec / 75 ° C., is also considered as a candidate for this hard urethane.

  In the seismic isolation device according to each of the above embodiments, the coil spring is pressed from above and below by the lid material. Instead, the upper and lower ends of the coil spring are fixed to the lid material by using a fixing tool such as a screw. As such a structure, you may employ | adopt the structure which makes a coil spring follow the displacement of a seismic isolation apparatus more reliably.

It is sectional drawing of the seismic isolation apparatus which concerns on the 1st Embodiment of this invention. It is a principal part enlarged view which expands and shows the principal part of the coil spring of the seismic isolation apparatus which concerns on the 1st Embodiment of this invention. It is a principal part enlarged view which expands and shows the principal part of a coil spring in the state which the displacement added to the seismic isolation apparatus which concerns on the 1st Embodiment of this invention. It is sectional drawing of the seismic isolation apparatus which shows the state which inject | pours the injection material at the time of assembling the seismic isolation apparatus which concerns on the 1st Embodiment of this invention. It is a figure of the graph showing the stress distortion curve of the coil spring which concerns on the 1st Embodiment of this invention. It is sectional drawing of the seismic isolation apparatus which concerns on the 2nd Embodiment of this invention. It is sectional drawing of the seismic isolation apparatus which concerns on the 3rd Embodiment of this invention. It is explanatory drawing showing the atomic arrangement | sequence of the coil spring which concerns on embodiment of this invention, Comprising: (A) is a figure showing a martensitic phase, (B) is a figure showing the state which the deformation | transformation started in the martensitic phase. (C) is a diagram showing a state in which the deformation of the martensite phase is finished. It is explanatory drawing showing the atomic arrangement | sequence of a general metal, Comprising: (A) is a figure showing the state in which the atom was arranged uniformly, (B) represents the state which the shift | offset | difference produced in a part of arrangement | sequence of an atom. FIG. It is a figure which shows the graph showing the change of tan-delta with respect to the horizontal displacement in each sample.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Seismic isolation device 16 Outer laminated body 16A Inner peripheral surface 16B Convex part 18 Rubber ring (outer elastic board)
20 Metal ring (outer hard plate)
22 Coil spring 22A Wire material 24 Coil spring 24A Wire material 26 Injection material 30 Coil spring 30A Wire material

Claims (7)

An outer laminated body having a shape in which an outer elastic plate having elasticity and formed in a ring shape and an outer hard plate having rigidity and formed in a ring shape are alternately laminated;
A coil spring that is disposed in the outer laminated body and is made of a plurality of metals each having a rectangular cross-sectional shape and different outside diameters;
An injection material that can be injected into the outer laminate to restrain the movement of each coil spring;
A seismic isolation device characterized by having   2. The seismic isolation device according to claim 1, wherein hard urethane is used as the injection material.   2. The seismic isolation device according to claim 1, wherein the inner peripheral surface of the outer laminated body is formed in a concavo-convex shape in accordance with the outer peripheral surface side shape of the plurality of coil springs.   The seismic isolation device according to claim 1, wherein a plurality of coil springs are coaxially combined and arranged in the outer laminated body.   The seismic isolation device according to claim 1, wherein the cross-sectional shape of the wire constituting each coil spring is a rectangle having a long side in the radial direction of the coil spring.   The seismic isolation device according to claim 1, wherein the wire constituting each coil spring is formed of a twinned metal material. Cu-Al-Mn alloy, Mg-Zr alloy, Mn-Cu alloy, Mn-Cu-Ni-Fe alloy, Cu-Al-Ni alloy, Ti-Ni alloy, Al-Zn alloy, Cu-Zn-Al alloy, Mg alloy, Cu-Al-Co alloy, Cu-Al-Mn-Ni alloy, Cu-Al-Mn-Co alloy, Cu-Si alloy, Fe-Mn-Si alloy, Fe-Ni-Co-Ti alloy, Fe 7. An exemption according to claim 6, wherein any one of -Ni-C alloy, Fe-Cr-Ni-Mn-Si-Co alloy, Ni-Al alloy and SUS304 is used as a twinned metal material. Seismic device.

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