JP2006029348A - Damping material, and base-isolating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide damping material, and a base-isolating device, having similar characteristics to conventional devices or better without adding loads to environments. <P>SOLUTION: A rubber member 16 formed in cylindrical form between a pair of connection plates 12 and 14. At a circular hole part 16A existing at a center of the rubber member 16, damping material 26 formed in a cylindrical form is engaged. The damping material 26 is composed of a plurality of disc-shaped magnets 22 put on each other in such a state that they are magnetized to magnetically attract each other. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vibration damping material having characteristics equal to or higher than those of conventional ones without giving a load to the environment, and a seismic isolation device employing such a vibration damping material.

  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 incorporates not only a rubber body, which is an elastic body, but also a vibration damping material for suppressing vibrations caused by shaking, and horizontal vibrations due to the combined action of these members. By absorbing this, the shaking of the earthquake was reduced, making it difficult to transmit the shaking of the earthquake to the building side.

However, as a damping material for conventional seismic isolation devices, lead plugs using lead materials were generally adopted from the viewpoint of damping characteristics. However, as environmental considerations have become increasingly important in recent years, It has been considered to replace the material.
JP-A-1-250547

In other words, it has been necessary to develop a vibration damping material employed in the seismic isolation device that has a vibration damping characteristic equivalent to or higher than that of a conventional vibration damping material without causing a load on the environment.
In view of the above facts, an object of the present invention is to provide a vibration damping material having characteristics equal to or higher than those of conventional ones without giving a load to the environment, and a seismic isolation device employing such a vibration damping material.

  The damping material according to claim 1 is formed by a plurality of magnetized magnets.

The operation of the vibration damping material according to claim 1 will be described below.
According to this claim, since the damping material is formed by a plurality of magnetized magnets, when stress is applied from the outside, the magnet is displaced between the plurality of magnets against the mutual magnetic force. As a result of the occurrence of displacement, the spring has a relatively low spring constant and is damped. As a result, it has a damping characteristic.

  Along with this, compared to the damping material made of lead material, the area of the stress-strain curve surrounded by the hysteresis in the stress-strain curve due to repeated displacement decreases, so the damping characteristics are stable and It has damping characteristics equal to or better than that of the damping material.

  On the other hand, since the vibration damping material of this claim is formed by a plurality of magnetized magnets, the vibration damping characteristics as described above can be obtained without using a lead material. For this reason, there is no load on the environment.

  The vibration damping material according to claim 2 is characterized by being formed by accumulating magnetized granular magnets.

The operation of the vibration damping material according to claim 2 will be described below.
According to the present invention, since the damping material is formed by accumulating the magnetized granular magnets, the granular magnets resist the mutual magnetic force when stress is applied from the outside. Displacement caused by a gap between them has a relatively low spring constant and causes damping, and as a result, has damping characteristics.

  Accordingly, as in the case of claim 1, compared with the damping material made of lead material, the decrease in the area surrounded by the hysteresis in the stress strain curve due to repeated displacement is reduced, so that the damping characteristic is stabilized. Therefore, it has a vibration damping characteristic equivalent to or better than that of the conventional damping material.

  On the other hand, the damping material according to the present invention is formed by integrating magnetized granular magnets, so that the damping characteristics as described above can be obtained without using a lead material as in the case of Claim 1. It becomes like this. For this reason, there is no load on the environment.

The operation of the damping material according to claim 3 will be described below.
The present invention has the same configuration as that of the second embodiment and operates in the same manner, but further has a configuration in which a rod-shaped ferromagnetic body is disposed in a magnet accumulation portion in which granular magnets are accumulated.

  In other words, compared to granular magnets, a large bar-shaped ferromagnetic material is arranged in the magnet accumulator and the damping material makes this rod-shaped ferromagnetic material disengaged when the granular magnets deviate from each other. It becomes resistance. Therefore, when the spring constant is insufficient and optimal vibration damping characteristics cannot be obtained, the spring constant can be increased to a necessary size by arranging the rod-shaped ferromagnetic material in the magnet integrated portion. .

The seismic isolation device according to claim 4 includes a damping material formed by a plurality of magnetized magnets,
A rubber body which is arranged in parallel with the damping material and can be elastically deformed;
It is characterized by having.

The effect | action of the seismic isolation apparatus which concerns on Claim 4 is demonstrated below.
According to this claim, the vibration damping material is formed by a plurality of magnetized magnets, and the rubber body is arranged in parallel with the vibration damping material.

  Therefore, in the present claim, since the damping material formed by a plurality of magnetized magnets is adopted, when stress is applied from the outside, the magnetic force between them is the same as in the first aspect. In contrast, when the magnets are displaced and are displaced due to displacement, the springs have a relatively low spring constant and are damped. As a result, the vibration damping characteristics are obtained.

  Accordingly, as compared with the damping material made of lead material, since the decrease in the area surrounded by the hysteresis in the stress strain curve due to repeated displacement is reduced as in the case of claim 1, the damping characteristics are stabilized. Therefore, it has a vibration damping characteristic equivalent to or better than that of the conventional damping material.

  As a result of the above, according to the seismic isolation device according to the present claim, even when an earthquake occurs, the composite between the rubber body that is arranged in parallel with the damping material and elastically deforms and the damping material This reduces the shaking of the earthquake and makes it difficult to transmit the shaking to the building.

  On the other hand, since the damping material used in the seismic isolation device according to the present invention is formed by a plurality of magnetized magnets, the above-described good damping characteristics can be obtained without using a lead material. For this reason, according to the seismic isolation apparatus of this claim, it does not give load to an environment.

The seismic isolation device according to claim 5 includes a damping material formed by accumulating magnetized granular magnets,
A rubber body which is arranged in parallel with the damping material and can be elastically deformed;
It is characterized by having.

The operation of the seismic isolation device according to claim 5 will be described below.
According to the present claim, a vibration damping material is formed by accumulating magnetized granular magnets, and further, a seismic isolation device in which a rubber body is arranged in parallel with the vibration damping material.

  Therefore, in this claim, since the damping material formed by accumulating each magnetized granular magnet is adopted, when stress is applied from the outside, it resists the mutual magnetic force. Displacement is caused between the granular magnets, thereby having a relatively low spring constant and damping. As a result, it has a damping characteristic.

  Accordingly, as compared with the damping material made of lead material, since the decrease in the area surrounded by the hysteresis in the stress strain curve due to repeated displacement is reduced as in the case of claim 1, the damping characteristics are stabilized. Therefore, it has a vibration damping characteristic equivalent to or better than that of the conventional damping material.

  As a result of the above, according to the seismic isolation device according to the present claim, even when an earthquake occurs, the composite between the rubber body that is arranged in parallel with the damping material and elastically deforms and the damping material This reduces the shaking of the earthquake and makes it difficult to transmit the shaking to the building.

  On the other hand, the damping material used in the seismic isolation device according to the present invention is formed by integrating magnetized granular magnets. Vibration suppression characteristics can be obtained. For this reason, there is no load on the environment.

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 fifth aspect and operates in the same manner. Further, the vibration damping material has a structure in which a rod-shaped ferromagnetic body is disposed in a magnet accumulation portion in which granular magnets are accumulated. It has the structure of.

  In other words, compared to granular magnets, a large bar-shaped ferromagnetic material is arranged in the magnet accumulator and the damping material makes this rod-shaped ferromagnetic material disengaged when the granular magnets deviate from each other. It becomes resistance. Therefore, when the spring constant is insufficient and optimal vibration damping characteristics cannot be obtained, it is possible to increase the spring constant to a required size by arranging a rod-shaped ferromagnetic body in the magnet integrated portion. This is possible with seismic devices.

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

  1st Embodiment of the damping material and seismic isolation apparatus which concerns on this invention is described based on FIGS. As shown in FIGS. 1 and 2, the upper and lower portions of the seismic isolation device 10 according to the present embodiment 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, a rubber body 16 formed in a cylindrical shape with a circular hole 16A in the center is disposed. The rubber body 16 includes a plurality of rubber rubber rings 18 that are formed in a ring shape and can be elastically deformed, and a plurality of metal metal rings 20 that are formed in a ring shape and maintain rigidity. The structure is arranged.

  On the other hand, the pair of connecting plates 12 and 14 are attached by vulcanization and bonding to the upper and lower ends of the rubber body 16, respectively, and stepped portions are provided in the middle of the pair of connecting plates 12 and 14, respectively. Circular through-holes 12A and 14A having the shape are formed. However, the lid member 30 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 32, respectively. The through holes 12A and 14A are closed.

  A cylindrical damping member 26 is disposed in the circular hole 16A present in the center of the rubber body 16 so that the damping member 26 is circular. A plurality of plate-like magnets 22 are magnetized and stacked so as to be attracted to each other by magnetic force. For this reason, in the present embodiment, the rubber body 16 that can be elastically deformed is arranged in parallel with the damping material 26 that is formed by a plurality of magnetized magnets 22.

  As shown in FIG. 1, the rubber body 16 has a diameter D1 of about 1.5 m, for example, and a height H1 of about 40 cm. The vibration damping material 26 has a diameter D2 of about 30 cm and a height H2 of about 45 cm.

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, a plurality of disk-shaped magnets 22 are manufactured, and each of the plurality of magnets 22 is magnetized, and then the plurality of magnets 22 are stacked to form a cylindrical shape. The damping material 26 is produced. That is, the damping material 26 has a structure in which a plurality of disk-shaped magnets 22 are stacked in a magnetized state.

  Separately, a rubber 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 and bonded to the top and bottom of the rubber body 16. Will be attached to each. Thereafter, the damping material 26 is inserted into the hole 16A of the rubber body 16 through the through holes 12A and 14A of the connecting plates 12 and 14, and the lid member 30 is attached to the connecting plates 12 and 14. The seismic isolation device 10 is completed by attaching and screwing each.

Next, the operation of the vibration damping material 26 and the seismic isolation device 10 according to the present embodiment will be described below.
According to the present embodiment, the damping material 26 is formed by the plurality of magnetized magnets 22, and the seismic isolation device has a structure in which the rubber body 16 is arranged in parallel with the damping material 26. It is 10.

  Therefore, in the present embodiment, the damping material 26 formed by the plurality of magnetized magnets 22 is employed, so that, for example, the stress in the direction of the arrow X in FIG. In this case, a displacement occurs between the plurality of magnets 22 while resisting the magnetic force between each other, thereby having a relatively low spring constant and damping. As a result, the damping characteristics are reduced. To have.

  Along with this, since the decrease in the area surrounded by the hysteresis line F in the stress-strain curve of FIG. It is stable and has a damping characteristic equivalent to or better than that of the prior art damping material.

  That is, when stress is repeatedly applied from the outside to the damping material 26, the damping material 26 is repeatedly displaced so that the hysteresis line F in the stress strain curve of FIG. The area surrounded by the line F does not change.

  On the other hand, when the stress is repeatedly applied from the outside to the lead material that has been used conventionally, the lead material is repeatedly displaced as shown by the hysteresis line F in the stress strain curve of FIG. The area of the range surrounded by the line F gradually decreases. This is considered to be due to the result that the temperature of the lead material having a low melting point rises and softens with displacement. From this, it can be said that the vibration damping material 26 of the present embodiment is a good material having lower temperature dependency than the lead material.

  As a result of the above, according to the seismic isolation device 10 according to the present embodiment, even when an earthquake occurs, the rubber body 16 arranged in parallel with the vibration damping material 26 and elastically deformed, and the vibration damping material 26 The combined action between the two reduces earthquake shaking and makes it difficult to transmit earthquake shaking to the building.

  On the other hand, the vibration damping material 26 used in the seismic isolation device 10 of the present embodiment is formed by a plurality of magnetized magnets 22, and thus has good vibration damping characteristics as described above without using a lead material. Can be obtained. For this reason, according to the seismic isolation apparatus 10 of this Embodiment, it does not give a load to an environment.

Next, a second embodiment of the vibration damping material and 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 duplicate description is abbreviate | omitted.
As shown in FIG. 4, the seismic isolation device 10 according to the present embodiment is different from the first embodiment in that a damping material 46 is formed by accumulating magnetized granular magnets 42. The structure has. However, similarly to the first embodiment, the rubber body 16 is arranged in parallel with the damping material 46.

  On the other hand, in the present embodiment, before the granular magnets 42 are magnetized outside the seismic isolation device 10 before being incorporated into the seismic isolation device 10, these granular magnets 42 are integrated and incorporated, thereby suppressing vibration. It is conceivable to form the material 46. However, after the magnet 42 is incorporated in the seismic isolation device 10 in a non-magnetized state, the entire damping material 46 may be magnetized. At this time, it is not necessary to put a binder in the damping material 46 in order to bond the granular magnets 42 to each other.

  Therefore, since the seismic isolation device 10 according to the present embodiment employs the damping material 46 formed by accumulating the magnetized granular magnets 42, the arrow X in FIG. When direction stress is applied from the outside, a relatively low spring as in the first embodiment is generated by causing displacement between the granular magnets 42 against the magnetic force between them. Along with having a constant, damping occurs, resulting in damping characteristics.

  Accordingly, as compared with the damping material made of lead material, the area reduction due to repeated displacement in the range surrounded by the hysteresis in the stress-strain curve is reduced as in the first embodiment. It is stable and has a damping characteristic equivalent to or better than that of the prior art damping material.

  As a result of the above, according to the seismic isolation device 10 according to the present embodiment, even when an earthquake occurs, the rubber that is arranged in parallel with the damping material 46 and elastically deforms in the same manner as in the first embodiment. The combined action between the body 16 and the damping material 46 reduces the earthquake vibration, making it difficult to transmit the earthquake vibration to the building.

  On the other hand, the damping material 46 used in the seismic isolation device 10 of the present embodiment is formed by accumulating the magnetized granular magnets 42, so that the lead material is made in the same manner as in the first embodiment. The vibration damping characteristics as described above can be obtained without using them. For this reason, there is no load on the environment.

  In addition, it is thought that the range of 1 micrometer-200 micrometers is suitable as a particle size of the magnet 42 here. In other words, if it is less than 1 μm, the magnetic force becomes too weak, and if it exceeds 200 μm, the filling rate becomes low, and the contact area between the magnets is small and effective earthquake vibration attenuation cannot be obtained. Because it becomes like this.

Next, a third embodiment of the vibration damping material and 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, 2nd embodiment, and the overlapping description is abbreviate | omitted.
As shown in FIG. 5, in the seismic isolation device 10 according to the present embodiment, the damping material 46 has a structure in which a rod-like ferromagnetic body 48 is arranged in a magnet accumulation portion 44 in which granular magnets 42 are accumulated. Yes.

  That is, unlike the second embodiment, the rod-shaped ferromagnetic body 48 that is larger than the granular magnet 42 is disposed in the magnet accumulation portion 44, so that the granular magnets 42 are displaced from each other. The rod-shaped ferromagnetic body 48 becomes a resistance. Therefore, when the spring constant is insufficient and optimal vibration damping characteristics cannot be obtained, the spring constant can be increased to a necessary size by arranging the rod-shaped ferromagnetic body 48 in the magnet integrated portion 44. It becomes possible.

  In the first embodiment, the damping material 26 is formed by the plurality of magnets 22 and the seismic isolation device 10 is formed. However, after these magnets 22 are placed in the seismic isolation device 10, the magnets 22 may be finely crushed and used.

  Moreover, in the said 3rd Embodiment, although the ferromagnetic body 48 has a structure arrange | positioned in the magnet integrated part 44 of the damping material 46, as a material of this ferromagnetic body 48, for example, an iron-type is used. Although it is conceivable to use metal, other materials may be used. On the other hand, as the material of the magnet used in the above embodiment, ferrite that does not generate rust, a rare earth magnet having a strong magnetic force, an alloy magnet such as Alnico, and the like are conceivable.

It is a disassembled perspective view of the seismic isolation apparatus which concerns on the 1st Embodiment of this invention. It is sectional drawing of the seismic isolation apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the graph showing the stress strain curve of a damping material, Comprising: (A) is a figure of the graph showing the stress strain curve of the damping material which concerns on 1st Embodiment, (B) is lead material It is a figure of the graph showing the stress-strain curve. 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.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Seismic isolation device 16 Rubber body 22 Magnet 26 Damping material 42 Magnet 44 Magnet accumulation part 46 Damping material 48 Ferromagnetic material

Claims (6)

  A vibration damping material characterized in that it is formed of a plurality of magnetized magnets.   A vibration damping material characterized by being formed by accumulating magnetized granular magnets.   3. The vibration damping material according to claim 2, wherein a rod-shaped ferromagnetic body is disposed in a magnet accumulation portion in which granular magnets are accumulated. A damping material formed by a plurality of magnetized magnets,
A rubber body which is arranged in parallel with the damping material and can be elastically deformed;
A seismic isolation device characterized by having A damping material formed by accumulating magnetized granular magnets,
A rubber body which is arranged in parallel with the damping material and can be elastically deformed;
A seismic isolation device characterized by having 6. The seismic isolation device according to claim 5, wherein the damping material has a structure in which a rod-shaped ferromagnetic body is disposed in a magnet accumulation portion in which granular magnets are accumulated.

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