JP2011202691A - Base isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation device suppressing a temperature rise of laminated rubber.SOLUTION: An outer diameter of a metallic plate 20 is larger than that of a laminated rubber body 12, and projected radially outside of a side wall of the laminated rubber body 12. A portion of each metallic plate 20 radially outside of rubber 16 is defined hereinafter as 'a heat radiation portion 22'. The metallic plate 20 may be constituted of a steel plate or the like. The heat radiation portion 22 is exposed to the outside, and is extended radially outside of mounting plates 14A, 14B.

Description

  The present invention relates to a seismic isolation device provided with laminated rubber in which rubber sheets and steel plates are alternately laminated.

  Conventionally, seismic isolation devices have been used to protect buildings and structures from vibrations such as earthquakes. As a seismic isolation device, a device using laminated rubber in which rubber sheets and steel plates are alternately laminated is known (see Patent Document 1).

  By the way, the laminated rubber attenuates vibration by converting vibration energy into heat energy according to material characteristics. Therefore, when this seismic isolation device is shear-deformed, the laminated rubber self-heats. In particular, when long-time shaking continues for a long period, such as long-period ground motion, the temperature of the laminated rubber rises due to self-heating of the laminated rubber, resulting in a high temperature, such as reduced rigidity and reduced energy absorption. It is considered that a performance change occurs.

JP2005-299762

  The object of the present invention has been made in view of the above facts, and is to provide a seismic isolation device capable of suppressing temperature rise of laminated rubber.

  In order to achieve the above object, a seismic isolation device according to a first aspect of the present invention includes a laminated rubber body in which rubber and a plurality of metal plates are alternately laminated, and both end faces of the laminated rubber body in the laminating direction. A mounting plate that protrudes outward in the surface direction from the laminated rubber body and is attached to a structure, and a heat radiating portion that is formed on the outer surface of the side wall of the laminated rubber body and radiates heat in the laminated rubber body. I have.

  According to the seismic isolation device of the present invention, since the heat in the laminated rubber body is radiated to the outside by the heat radiating portion, the temperature rise of the laminated rubber body can be suppressed.

The heat radiating part of the seismic isolation device according to the second aspect of the present invention is characterized in that the metal plate protrudes outward from the mounting plate.

Thus, by projecting the metal plate, the external projecting surface area of the metal plate is increased, and the heat in the laminated rubber body can be effectively radiated to the outside.

In the seismic isolation device according to the third aspect of the present invention, the heat radiating portion is formed by forming irregularities on an externally exposed portion of the metal plate.

  Thus, by forming irregularities on the externally exposed portion of the metal plate, the external protruding surface area of the metal plate is increased, and the heat in the laminated rubber body can be effectively radiated to the outside.

The seismic isolation device according to the fourth aspect of the present invention is characterized in that a rust prevention treatment is applied to an externally exposed portion of the metal plate.

Thus, the rust of a metal plate can be prevented by performing an antirust process to the externally exposed part of a metal plate.

The seismic isolation device according to the fifth aspect of the present invention is characterized in that the heat dissipating part is configured such that rubber constituting the laminated rubber body protrudes from the outer surface of the side wall.

As described above, by projecting the rubber, the external projecting surface area of the rubber portion is increased, and the heat in the laminated rubber body can be effectively radiated to the outside.

The seismic isolation device according to the sixth aspect of the present invention is characterized in that the heat dissipating part is configured by forming irregularities on an externally exposed portion of the rubber constituting the laminated rubber body.

As described above, by forming irregularities on the externally exposed portion of the rubber, the external protruding surface area of the rubber is increased, and the heat in the laminated rubber body can be effectively radiated to the outside.

  As described above, according to the present invention, the temperature rise of the laminated rubber can be suppressed.

It is a perspective view of the seismic isolation apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing of the seismic isolation apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing of the state in which the seismic isolation apparatus which concerns on 1st Embodiment of this invention carried out the shear deformation. It is sectional drawing of the modification of the seismic isolation apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing of the modification of the seismic isolation apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing of the modification of the seismic isolation apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing of the modification of the seismic isolation apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing of the modification of the seismic isolation apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing of the modification of the seismic isolation apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing of the modification of the seismic isolation apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing of the modification of the seismic isolation apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing of the modification of the seismic isolation apparatus which concerns on 2nd Embodiment of this invention. It is sectional drawing of the modification of the seismic isolation apparatus which concerns on 2nd Embodiment of this invention.

[First Embodiment]
Hereinafter, the seismic isolation apparatus 10 which concerns on 1st Embodiment of this invention is demonstrated with reference to drawings.

  1 to 3 show a seismic isolation device 10 according to a first embodiment of the present invention. The seismic isolation device 10 includes a laminated rubber body 12 and mounting plates 14A and 14B. The laminated rubber body 12 is a laminated body in which a plurality of disk-shaped metal plates 20 and a plurality of disk-shaped rubbers 16 are alternately stacked in the thickness direction (arrow B direction).

  The metal plate 20 and the rubber 16 are firmly integrated by vulcanization adhesion. As described above, not only the rubber 16 but also the metal plates 20 are alternately stacked, so that the load has a predetermined rigidity with respect to the load in the vertical direction (arrow B direction), and the horizontal direction (arrow For a load in the direction (E), a spring function is exhibited and a predetermined deformation amount can be secured.

  The outer diameter of the metal plate 20 is larger than the outer diameter of the laminated rubber body 12 and protrudes radially outward from the side wall of the laminated rubber body 12. The radially outer portion of the metal plate 20 than the rubber 16 is hereinafter referred to as a “heat dissipating part 22”. The metal plate 20 can be composed of a steel plate or the like.

  The heat radiating portion 22 is exposed to the outside and extends to the outside in the radial direction from the mounting plates 14A and 14B. The heat dissipating part 22 is subjected to rust prevention treatment. As the antirust treatment, normal temperature galvanizing, hot dip galvanizing, etc. are effective.

  Attachment plates 14A and 14B are fixed to both ends of the laminated rubber body 12 in the thickness direction (arrow B direction). The mounting plates 14A and 14B are made of thick annular steel plates. The mounting plates 14A and 14B protrude outward in the radial direction of the side surface of the rubber 16 (side surface of the laminated rubber body 12).

  The mounting plates 14A and 14B are fixed to a foundation (not shown) installed on the ground and a structure (not shown) installed on the seismic isolation device 10, respectively. In this state, when the ground (and the foundation) and the structure move relative to each other in the horizontal direction, the vibration energy of the relative movement is partially absorbed by the shear deformation of the laminated rubber body 12.

Next, the operation of the seismic isolation device 10 will be described.
The seismic isolation device 10 is disposed between the structure and the foundation, and normally receives a vertical load from the structure. When the foundation and the structure move relative to each other with a horizontal component due to an earthquake or the like, as shown in FIG. 3, the laminated rubber body 12 undergoes shear deformation and the vibration is absorbed. At this time, vibration energy is converted into heat energy, and the rubber 16 generates heat. This heat is transmitted to the metal plate 20 that is in close contact with the rubber 16, and is radiated to the outside from the heat radiating portion 22, thereby suppressing the temperature rise of the rubber 16.

  Thus, in this embodiment, since the heat | fever of the rubber | gum 16 can be thermally radiated outside via the thermal radiation part 22 of the metal plate 20, the temperature rise of the laminated rubber body 12 can be suppressed. In particular, when the earthquake vibration continues for a long time, it is considered that the amount of heat generated by the rubber 16 increases. However, by effectively releasing the internal heat through the heat radiating portion 22, the laminated rubber body It is possible to suppress a decrease in rigidity and a decrease in energy absorption amount (attenuation amount) due to the temperature of 12 becoming high.

  In the present embodiment, all the metal plates 20 are protruded radially outward from the rubber 16 to form the heat radiating portion 22, but it is not always necessary to protrude all the metal plates 20 from the rubber 16, The heat radiating portion 22 may be provided only on the metal plate 20. Thus, when providing the heat radiation part 22 only in a part of the metal plates 20, as shown in FIG. 4, the metal plate 20 at the center in the stacking direction B of the metal plates 20 is made large in diameter and the heat radiation part 22 is formed. It is preferable to provide it. This is because the heat at the end in the stacking direction B is radiated to the outside through the mounting plates 14A and 14B, and therefore, the heat radiation by the heat radiating part 22 is particularly high in the central part.

  Further, as shown in FIG. 5 and FIG. 6, the heat radiating part 22 has a rough surface to increase the surface area by scraping the surface to make the heat radiating part 22A or by projecting the surface to make the heat radiating part 22B. Thus, the efficiency of heat dissipation may be increased.

  Further, as shown in FIG. 7, a plurality of heat radiating holes 22 </ b> H may be drilled in the heat radiating portion 22 in the thickness direction to increase the surface area and increase the heat radiating efficiency.

  Further, as shown in FIG. 8, the heat radiating portion 22 may be provided with a plurality of heat radiating holes 22I in the radial direction to increase the surface area and increase the efficiency of heat radiating.

  Further, as shown in FIG. 9, the heat radiating portion 22 may be provided with a cut portion 22 </ b> K in the peripheral portion in the thickness direction to increase the surface area and increase the heat radiating efficiency.

  Moreover, the thermal radiation part 22 may be coat | covered with the rubber | gum 18, as shown in FIG. In this case, the heat radiation amount is reduced as compared with the case where the metal plate 20 is exposed to the outside, but the temperature rise in the laminated rubber body 12 is suppressed as compared with the case where the heat radiation portion is not provided. It is also possible to prevent the heat radiating portion 22 from being deteriorated.

  In the present embodiment, the metal plate 20 is protruded from the side surface of the rubber 16 (laminated rubber body 12) to form the heat radiating portion 22, but the metal plate 20 is formed from the side surface of the rubber 16 as shown in FIG. The heat radiating portion 23 can also be formed by forming a recess in the end face of the metal plate 20 without projecting. Thus, also in the configured heat radiating part 23, the surface area of the end surface of the metal plate 20 is increased by the recess, and compared with the case where the heat radiating part 23 is not configured, the heat radiation from the inside of the laminated rubber body 12 is reduced. Efficiency can be increased.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the present embodiment, the metal plate 20 of the first embodiment does not have the heat radiating portion 22, and the rubber heat radiating portion 32 configured integrally with the rubber 16 functions as a heat radiating portion.

  As shown in FIG. 12, the seismic isolation device 30 according to the second embodiment of the present invention includes a laminated rubber body 12 and mounting plates 14A and 14B. The laminated rubber body 12 is a laminated body in which a plurality of disk-shaped metal plates 20 and a plurality of disk-shaped rubbers 16 are alternately stacked in the thickness direction (arrow B direction).

  The outer diameter of the metal plate 20 is made smaller than the outer diameter of the laminated rubber body 12, and the covering rubber 32 is arranged in a cylindrical shape on the outer edge of the metal plate 20. The metal plate 20 is covered with the covering rubber 32, so that the metal plate 20 is not exposed to the outside and deterioration is prevented. Further, the side wall of the laminated rubber body 12 is constituted by a covering rubber 32.

  The covering rubber 32 has a heat radiating protrusion 34 protruding outward in the radial direction. Due to the heat radiating protrusion 34, the surface area of the covering rubber 32 is larger than in the case of a flush shape where the heat radiating protrusion 34 is not formed.

Next, the operation of the seismic isolation device 30 will be described.
When the laminated rubber body 12 of the seismic isolation device 30 undergoes shear deformation due to an earthquake or the like and the vibration is absorbed, the vibration energy is converted into heat energy, and the rubber 16 generates heat. This heat is transmitted to the metal plate 20 that is in close contact with the rubber 16 and the covering rubber 32 formed integrally with the rubber 16, and is radiated to the outside from the heat radiating protrusion 34 of the covering rubber 32, and the temperature of the rubber 16 Is suppressed.

  As described above, in this embodiment, the heat of the rubber 16 can be radiated to the outside through the heat radiating protrusion 34 of the covering rubber 32 outside the laminated rubber body 12, so that the temperature rise of the laminated rubber body 12 is increased. Can be suppressed. In particular, when the earthquake vibration continues for a long time, the amount of heat generated by the rubber 16 may increase. However, by effectively releasing the internal heat through the heat radiating protrusion 34, the laminated rubber It is possible to suppress a decrease in rigidity and a decrease in energy absorption amount (attenuation amount) due to the body 12 becoming high temperature.

  In addition, as shown in FIG. 13, the thermal radiation protrusion 34 of this embodiment can also be comprised as the thermal radiation protrusion 36 protruded to the radial direction outer side rather than attachment plate 14A, 14.

DESCRIPTION OF SYMBOLS 10 Seismic isolation device 12 Laminated rubber body 14A Mounting flange 14A Mounting plate 16 Rubber 18 Rubber 20 Metal plate 22 Heat radiation part 30 Seismic isolation device 32 Rubber heat radiation part 32 Cover rubber 34 Heat radiation protrusion 36 Heat radiation protrusion

Claims (6)

A laminated rubber body in which rubber and a plurality of metal plates are alternately laminated;
Mounting plates that are installed on both end surfaces in the laminating direction of the laminated rubber body so as to protrude outward in the surface direction from the laminated rubber body, and are attached to a structure;
Formed on the outer surface of the side wall of the laminated rubber body, and radiating part for radiating heat in the laminated rubber body;
Seismic isolation device with   The seismic isolation device according to claim 1, wherein the heat radiating portion is configured such that the metal plate protrudes outward from the mounting plate.   The seismic isolation device according to claim 1, wherein the heat radiating portion is configured by forming irregularities on an externally exposed portion of the metal plate.   The seismic isolation device according to claim 2, wherein a rust prevention treatment is applied to an externally exposed portion of the metal plate.   The seismic isolation device according to any one of claims 1 to 4, wherein the heat radiating part is configured such that rubber constituting the laminated rubber body protrudes from the outer surface of the side wall.   The radiating portion according to any one of claims 1 to 4, wherein the heat radiating portion is formed by forming irregularities on an externally exposed portion of the rubber constituting the laminated rubber body. Seismic device.

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