JP5238129B2 - Seismic isolation device, seismic isolation structure, and seismic isolation method - Google Patents

Description

  The present invention relates to a seismic isolation device, a seismic isolation structure using the seismic isolation device, and a seismic isolation method.

  Conventionally, an iron ball as a rotating body used in a seismic isolation device is mainly used as a bearing material and a bearing material that supports an upper structure so as to be slippery. A mechanism for damping vibration is provided by a separately provided damper. It depends.

  For this reason, for example, when constructing a seismic isolation floor, a certain level of floor height is required in order to place a damper, and it is impossible to use an existing building whose floor height has already been determined as a base isolation floor. was there.

  On the other hand, when the entire building has a seismic isolation structure, iron balls are usually placed on the foundation concrete and the support slab on which the building is constructed is slidably placed on the iron balls. .

  However, if the foundation concrete surface and the supporting slab surface are uneven, a gap is generated between the steel ball and the building is not supported stably. Moreover, since it is necessary to attach a damper separately, an apparatus becomes large and a fixed space is required in the height direction.

In view of this, a damping device has been proposed in which a rotating body having a damping function is sandwiched between a pair of moving members while being compressed and deformed, and the rolling of the compressed and deformed rotating body is used. (For example, refer to Patent Document 1).
JP-A-10-184094

  Now, for example, if the rotating body is crushed and deformed due to changes over time, the seismic isolation performance deteriorates. Then, since the rotating body needs to be replaced or maintained when it is crushed to a predetermined compression rate or more and compressed and deformed, it is necessary to periodically observe the state of compressive deformation of the rotating body. When performing such observation, the configuration of Japanese Patent Laid-Open No. 10-184094 is configured to look into the gap between the moving members from the side, and whether or not the rotating body is crushed to a predetermined compression ratio or more to be compressed and deformed. Must be observed. Therefore, it is very difficult to observe, and it is also very difficult to determine whether or not the compression deformation exceeds a predetermined compression rate.

  The present invention has been made to solve the above problems, and an object thereof is to enable easy observation of a rotating body in a compressed and deformed state.

The seismic isolation device according to claim 1 includes an elastically deforming rotating body having a damping function, a pair of moving members that are movable relative to each other and grip the rotating body in a compressed and deformed state, and the upper movement. A part of or all of the member is formed, the contact surface of the rotating body that is compressed and deformed contacts, the transparent surface that can be observed from above, and the transparent body is provided with the rotating body The mark which shows the magnitude | size of the said contact surface at the time of compressively deforming with the compression rate of this is characterized by the above-mentioned.

  The seismic isolation device according to claim 1 is in contact with the surface of the moving member and receives a compressive load on the surface by compressively deforming the rotating body (which may be spherical or elliptical). When the moving member relatively moves parallel to the surface due to vibration or the like, the rotating body is elastically deformed by the surface frictional force of the moving member.

  If the relative movement amount of the pair of moving members is within the elastic deformation range of the rotating body, the rotating body is vibration-proof so that the shaking and vibration of the moving member are not transmitted to the other.

  When the relative movement amount of the pair of moving members exceeds the elastic deformation range of the rotating body, the rotating body rolls between the pair of moving members with the relative movement of the moving member, and exhibits a seismic isolation action. At this time, the rotating body that has been crushed by compression deformation exhibits a damping force because the inside undergoes shear deformation during rotation, and the frictional resistance with the moving member when the rotating body rolls also acts as a damping force at the same time. Therefore, a high damping effect is exhibited by these combinations.

  Now, in order to obtain the effects described above, the rotating body needs to be crushed and compressed and deformed at a predetermined compression rate. The compression rate of the rotating body is determined by the size of the contact surface of the upper moving member. That is, the contact surface is small when the compression rate is small, and the contact surface is large when the compression rate is large.

  Since the upper moving member is provided with a transparent portion where the contact surface of the rotating body that has undergone compression deformation can be observed, the rotating body is crushed at a predetermined compression rate by observing the size of the contact surface. It can be easily determined whether or not.

Further, by comparing the mark of the transparent portion of the upper moving member with the contact surface, it can be easily determined whether or not the rotating body is compressed and deformed at a predetermined compression rate.

According to a second aspect of the present invention, there is provided the seismic isolation device according to the first aspect, wherein the transparent portion is provided with a mark line capable of determining whether or not the rotating body is at a predetermined position.

In the seismic isolation device according to claim 2 , since the transparent portion is provided with a mark line capable of determining whether or not the rotating body is in a predetermined position, the contact surface of the rotating body is compared with the mark. Thus, it can be easily determined whether or not the rotating body is at a predetermined position.

The seismic isolation device according to claim 3 is the structure according to claim 1 or 2 , wherein the rotating body is provided on one or both of the upper moving member and the lower moving member. It is characterized in that there is provided a restricting means for restricting the movement in the horizontal direction.

In the seismic isolation device according to the third aspect , since the restricting means for restricting the horizontal movement of the rotating body is provided by the restricting means, misalignment due to the rotating body rolling more than necessary is prevented.

According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, an intermediate body that is movable in the horizontal direction is provided between the moving members. The arrangement relationship of the rotating bodies is maintained, which is characterized by that.

The surface vibration device according to the fourth aspect is an intermediate body that is provided between the moving members and is movable in the horizontal direction, and maintains the positional relationship between the rotating bodies. Further, even if the rotating body rolls due to vibration or the like, the positional relationship of the arrangement does not collapse.

The seismic isolation device according to claim 5 is the structure according to any one of claims 1 to 3 , wherein the upper member and the lower member are restricted from rotating relative to each other. It is characterized by having a regulating means.

In the seismic isolation device according to the fifth aspect , the movement of the upper moving member and the lower moving member relatively rotating (twisting) is restricted by the rotating means. Therefore, no twisting force is applied to the rotating body.

The seismic isolation device according to claim 6 is the configuration according to claim 5 , wherein the upper movable member and the upper surface of the intermediate member are connected to each other, and are deformed in the vertical direction and the X direction on the horizontal plane perpendicular to the vertical direction. A first joining member that can be deformed in the Y direction perpendicular to the X direction on the horizontal plane perpendicular to the vertical direction by connecting the lower movable member and the lower surface of the intermediate member. And a joining member.

In the seismic isolation device according to the sixth aspect , the first connecting member connects the upper moving member and the upper surface of the intermediate member, and the second connecting member connects the lower moving member and the lower surface of the intermediate member. The first joining member and the second joining member can be deformed in the vertical direction, the first joining member can be deformed in the X direction, and the second joining member can be deformed in the Y direction orthogonal to the X direction. ing.

  With such a configuration, the upper moving member can move in the X direction with respect to the intermediate member. Further, the lower moving member is movable in the Y direction with respect to the intermediate member. Therefore, the upper moving member and the lower moving member can move relatively in the X direction and the Y direction, but the relatively rotating (twisting) movement is restricted. Therefore, no twisting force is applied to the rotating body.

  Since the first joining member and the second joining member can be deformed in the vertical direction, the attenuation function of the rotating body is not affected.

A seismic isolation device according to a seventh aspect is characterized in that, in the configuration according to any one of the first to sixth aspects, the rotating body is made of silicone rubber.

In the seismic isolation device according to claim 7 , the rotating body is made of silicone rubber. Silicone rubber maintains its rolling performance even if it continues to be compressed and deformed over a long period of time. Therefore, seismic isolation performance is maintained for a long time.

The seismic isolation device according to claim 8 is characterized in that, in the structure according to any one of claims 1 to 7 , the rotating body is a sphere.

In the seismic isolation device according to the eighth aspect , since the rotating body is a sphere, the seismic isolation performance can be exhibited uniformly in all horizontal directions.

A seismic isolation structure according to a ninth aspect includes the seismic isolation device according to any one of the first to eighth aspects.

The seismic isolation structure according to claim 9 is strong against vibration because it includes the seismic isolation device according to any one of claims 1 to 8 . Moreover, since it can be easily determined whether or not the rotating body is crushed at a predetermined compression rate, for example, it is easy to check the seismic isolation device.

The seismic isolation structure according to claim 10 is characterized in that, in the configuration according to claim 9 , the seismic isolation device is disposed between the foundation provided on the ground and the building body.

In the seismic isolation structure of claim 10, since the seismic isolation device is disposed between the foundation provided on the ground and the building body, for example, even if the ground shakes due to an earthquake, the building body shakes. It can be suppressed.

The seismic isolation structure according to claim 11 is characterized in that, in the structure according to claim 10 , an inspection port through which the abutment surface can be observed is provided in the floor portion of the building body. Since the 12 seismic isolation structures can observe the contact surface of the rotating body that has been compressed and deformed from the inspection opening on the floor of the building body, for example, the seismic isolation device can be easily inspected.

The seismic isolation method according to claim 12 is a seismic isolation method for constructing the seismic isolation structure according to any one of claims 9 to 11 , wherein the rotating body is compressed and deformed in advance. A pair of moving members are temporarily fixed, and after the construction of the seismic isolation structure, the temporary fixing is released.

In the seismic isolation method of claim 12 , the pair of moving members are temporarily fixed in a state where the rotating body is compressed and deformed in advance, and the seismic isolation structure is constructed in a stable state. Therefore, for example, the rotating body does not roll and shift during construction of the seismic isolation structure.

  As described above, according to the present invention, it is possible to easily observe the contact surface of the rotating body that is compressed and deformed by the transparent portion of the upper moving member.

  As shown in FIGS. 1 and 2, the house 10 having the seismic isolation device 100 according to the first embodiment of the present invention has a concrete placed on the ground and is flattened on a flat foundation 12. A seismic isolation device 100 is provided, and a building body 14 is constructed thereon.

  A steel base beam 16 of the building body 14 is placed on the seismic isolation device 100, and a flooring 18 is placed on the steel base beam 16. In FIG. 2, only the seismic isolation devices 100 arranged at the four corners are illustrated and others are omitted for easy understanding.

  As shown in FIG. 5, the seismic isolation device 100 is held between the lower plate 104 and the upper plate 102 in a state in which a sphere 110 as a rotating body having a damping function is compressed and deformed. In the present embodiment, nine spheres 110 are arranged in a lattice between the lower plate 104 and the upper plate 102 when viewed from above.

  The spherical body 110 has a substantially spherical shape with a diameter of 30 mm to 100 mm. The rubber hardness is 30 ° to 80 ° and is made of silicone rubber.

  As shown in FIGS. 1 to 3, the lower plate 104 of the seismic isolation device 100 is fixed to the foundation 12, and the upper plate 102 is fixed to the steel foundation beam 16. Accordingly, the sphere 110 functions as a rolling seismic isolation bearing that supports the building body 14 and also functions as a damper that attenuates vertical and horizontal vibrations by elastic deformation and shear deformation due to rolling.

  For this reason, the conventional seismic isolation device requires both the rolling seismic isolation bearing and the damper, but the seismic isolation device 100 bears both, and is space-saving. In addition, even if there are some irregularities on the surfaces of the lower plate 104 and the upper plate 102, the spherical body 110 is compressed and deformed and comes into contact with it, so that there is no gap and a stable structure is obtained.

  As shown in FIG. 5B, the upper plate 102 is made of a transparent member in which the contact surface 110A of the sphere 110 that has been compressed and deformed is visible (observable) from above. In addition, the material of the upper plate 102 is, for example, glass, plastic, acrylic material, vinyl chloride, or the like having a strength capable of supporting the building body 14 and the abutment surface 110A having a visible transparency. There is no particular limitation.

  Further, since the material of the lower plate 104 does not need to be transparent, it has a strength capable of supporting the building body 14 such as glass, plastic, acrylic material, vinyl chloride, laminated wood (wood), iron plate, concrete, and the like. If it is, it will not be specifically limited. In the case of an iron plate, in order to increase the frictional force with the sphere 110, the contact surface may be subjected to sand blasting or shot blasting.

  As shown in FIG. 3, the flooring 18 is provided with an inspection window 20 at a position above the seismic isolation device 100. The inspection window 20 is normally closed, and the upper surface of the flooring 18 is substantially flat. However, as shown in FIG. 4, when the inspection window 20 is opened, the entire upper plate 102 of the seismic isolation device 100 can be seen.

  As described above, the upper plate 102 is made of a transparent member, and the contact surface 110A of the spherically deformed sphere 110 is visible (observable) from above, and thus the inspection window 20 is opened in this way. Thus, the contact surface 110A can be observed.

  Although a part of the upper plate 102 is hidden by the steel base beam 16, it is sufficient that at least one contact surface 110A of the sphere 110 can be observed. In this embodiment, three of the nine are hidden by the steel foundation beam 16, but the remaining six are observable.

  Further, without providing the inspection window 20, a camera capable of photographing the contact surface 110A may be provided on the back surface of the flooring 18 for observation. Or you may make a part of flooring 18 transparent. Furthermore, if it is dark and difficult to see, the light may be illuminated from above.

  Even if the entire upper plate 102 is not made of a transparent member, only a part of the upper plate 102 may be transparent as long as the contact surface 110A of the sphere 110 can be observed (viewed).

  Next, an example of a construction method for the house 10 including the seismic isolation device 100 will be described.

  Concrete is placed on the ground, and a flat foundation 12 is constructed. The seismic isolation device 100 temporarily fixes the lower plate 104 and the upper plate 102 so that the sphere 110 is crushed at a predetermined compression rate and is in a compressed and deformed state. The seismic isolation device 100 in the temporarily fixed state is fixed to the foundation 12, and the steel base beam 16 is fixed thereon. Then, the building body 14 is constructed on the steel foundation beam 16. When the building body 14 is constructed, the temporary fixing is removed.

  Next, an example of the above-described temporary fixing method will be described.

  As shown in FIG. 6A, the spheres 110 are arranged on the lower plate 104, and the upper plate 102 is placed thereon.

  As shown in FIG. 6B, a support member 152 is fitted into the side surfaces of the lower plate 104 and the upper plate 102, and nuts 154 and bolts 155 are screwed into the support member 152.

  As shown in FIG. 6C, the nut 154 and the bolt 155 are turned to reduce the distance between the lower plate 104 and the upper plate 102, and the sphere 110 is crushed and compressed and deformed. In addition, the space | interval (compression rate of the spherical body 110) between the lower board 104 and the upper board 102 shall be substantially equivalent to the load at the time of the building main body 14 being constructed | assembled.

  As described above, after the building body 14 is constructed on the steel foundation beam 16, the support member 152, the nut 154, and the bolt 155 are removed.

  Thus, the seismic isolation device 100 is in a stable state because the lower plate 104 and the upper plate 102 are temporarily fixed in a state in which the sphere 110 is crushed and compressed and deformed at a predetermined compression rate. Therefore, the sphere 110 does not roll and shift during construction of the building body 14.

  Next, the operation of the seismic isolation device 100 will be described.

  In the state shown in FIG. 1, the foundation 12 moves in the horizontal direction due to shaking or vibration due to an earthquake or the like, and the lower plate 104 and the upper plate 102 move relatively.

  As shown in FIG. 7A, when the relative movement amount between the lower plate 104 and the upper plate 102 is within the elastic deformation range of the sphere 110, the surface frictional force between the lower plate 104 and the upper plate 102 is obtained. Due to the damping function caused by the elastic deformation of the sphere 110, no vibration or vibration is transmitted to the building body 14.

  As shown in FIG. 7B, when the shaking and vibration are large and the relative movement amount between the lower plate 104 and the upper plate 102 exceeds the elastic deformation range of the sphere 110, the relative movement between the lower plate 104 and the upper plate 102 is achieved. Accordingly, the sphere 110 rolls between the lower plate 104 and the upper plate 102 in the horizontal direction. Therefore, the sphere 110 exhibits a seismic isolation function that absorbs shaking as a rolling seismic isolation bearing.

  Furthermore, since the inside of the sphere 110 undergoes shear deformation during rotation, the sphere 110 exhibits a damping force. Further, the frictional resistance of the lower plate 104 and the upper plate 102 when the sphere 110 rolls also acts as a damping force at the same time. Therefore, a high damping effect is exhibited by these combinations.

  In addition, since the spherical body 110 as a rotating body has a substantially perfect circle shape, it can exhibit a seismic isolation function uniformly in all horizontal directions. Further, with respect to the vibration in the vertical direction, the sphere 110 is subjected to shear deformation, so that the vibration is attenuated.

  Now, in order to sufficiently obtain the above-described operational effects, the sphere 110 needs to be crushed and compressed and deformed at a predetermined compression rate. In the present embodiment, an appropriate compression ratio is a range in which the diameter of the sphere 110 is 20% to 50%.

  The compression rate refers to the distance H1 between the upper plate 102 and the lower plate 104 in a state where the sphere 110 is not crushed as shown in FIG. 6A, and the state in which the sphere 110 is crushed as shown in FIG. The distance H2 between the upper plate 102 and the lower plate 104 is “H2 / H1”.

  The compression rate of the sphere 110 can be determined by the size of the contact surface 110A (see FIG. 5) that can be observed on the upper plate. That is, the contact surface 110A is small when the compression rate is small, and the contact surface 110A is large when the compression rate is large. Further, the contact surface 10A can be observed by opening the inspection window 20 of the flooring 18 as described above. (See FIGS. 3 and 4).

  Further, as shown in FIGS. 5B and 8A, the upper plate 102 is formed with two large and small marking circles 132 and 134. The seal circle 132 and the seal circle 134 are concentric circles. In addition, mark lines 122 and 124 are formed in a lattice shape vertically and horizontally. The center of the mark circles 132 and 132 and the intersection of the mark lines 122 and 124 coincide with each other.

  In FIG. 8, only one sphere 110 is shown for easy understanding. In other drawings, the marking lines 122 and 124 and the marking circles 132 and 134 are not shown.

  The small inscribed circle 132 on the inside indicates the outer shape of the contact surface 110A when the compression rate of the sphere 110 is the lowest value (in this embodiment, the diameter is 20%). Also, the large outer circle 134 indicates the outer shape of the contact surface 110A when the compression rate of the sphere 110 is the highest value (in this embodiment, the diameter is 50%). Further, the intersection of the mark lines 122 and 124 indicates the center position where the sphere 110 should be arranged.

  Therefore, immediately after construction of the house 10, the inspection window 20 of the flooring 18 is opened (see FIGS. 3 and 4), and as shown in FIG. 8A, the intersection of the mark lines 122 and 124 and the contact surface 110A If there is a center position, it can be easily determined that it is arranged at the correct position. Further, by confirming that the outer shape (size) of the contact surface 110A is between the stamp circle 132 and the stamp circle 134, it is determined whether or not the sphere 110 is crushed and compressed and deformed at an appropriate compression rate. Easy to judge.

  Now, as shown in FIG. 8B, when the sphere 110 gradually collapses due to changes over time and the compression rate exceeds the maximum value, maintenance or replacement of the seismic isolation device 110 is required. Therefore, by periodically opening the inspection window 20 of the flooring 18 and checking whether the outer shape (size) of the contact surface 110A is larger than the outer stamp circle 134, replacement or maintenance is necessary. It can be easily determined whether or not there is.

  Further, as shown in FIG. 8C, even after the earthquake or the like, even if the sphere 110 rolls and the position shifts, the positional deviation can be easily observed. It should be noted that the marking lines 122 and 124 may be scaled so that the amount of deviation can be easily measured.

  Conventionally, an operator must enter between the foundation and the steel foundation beam, look into the seismic isolation device from the side, and inspect whether the sphere is crushed above the specified compression ratio. There wasn't. For this reason, it is very difficult to check, and it is also very difficult to determine (measure) whether or not it has been compressed and deformed beyond a predetermined compression rate.

  Furthermore, the space between the foundation and the steel foundation beam had to be wide enough for the operator to enter for inspection. However, since the seismic isolation device 100 of this embodiment can be inspected by observing the contact surface 110A from above as described above, it is necessary to widen the space between the foundation 12 and the steel base beam 16 more than necessary. Absent.

  In addition, the silicone rubber used for the sphere 110 has, as basic features, high heat resistance, stable physical properties over a wide temperature range, and high water repellency. Therefore, even in a harsh use environment such as the house 10 where the temperature change is large and is sometimes exposed to wind and rain, it is preferable because it exhibits a stable seismic isolation effect.

  Furthermore, it has been found by experiments of the present inventors that the sphere 110 made of silicone rubber maintains the rolling performance even if it continues to be compressed and deformed for a long period of time.

  Specifically, both the sphere made of silicone rubber and the natural rubber used for comparison roll smoothly in the horizontal direction as the lower plate 104 and the upper plate 102 move relative to each other in the initial stage. However, when thermal degradation is accelerated under a predetermined temperature environment (test that accelerates the change over time due to long-term compression deformation), the spherical surface of natural rubber is hardened by the effects of permanent deformation and oxidation. As a result, the compressed shape is maintained and the rotation is not smooth. On the other hand, a sphere made of silicone rubber has little permanent deformation and is less affected by oxidation or the like, so that the surface of the sphere is hardly cured. Therefore, since the shape in the compressed state is not maintained, there is not much difference in rolling performance between the initial stage and after the thermal deterioration.

  Therefore, as in this embodiment, by using the sphere 110 made of silicone rubber, stable seismic isolation performance can be exhibited over a long period of time.

  Next, other embodiments of the seismic isolation device 100 of the above embodiment will be described. In the following embodiments, the same members as those in the first embodiment are denoted by the same reference numerals, and redundant descriptions are omitted.

  As shown in FIG. 5, the seismic isolation device 100 of the first embodiment has nine spheres 110 arranged in a lattice pattern.

  On the other hand, as shown in FIG. 9A, the seismic isolation device 220 of the second embodiment has four spheres 110 arranged in a line.

  Moreover, as shown in FIG. 9B, the seismic isolation device 230 according to the third embodiment arranges the spheres 110 in a staggered pattern instead of a lattice pattern.

  The arrangement may be other than the above, and the number of spheres 110 is arbitrary.

  In the first embodiment, the surfaces where the lower plate 104 and the upper plate 102 are in contact with the sphere 110 are flat. Therefore, an embodiment in which a restricting means for restricting rolling of the sphere 110 is provided will be described below.

  As shown in FIG. 10, the seismic isolation device 240 according to the fourth embodiment is formed with a circular rib 244 that hangs downward on the lower surface of the upper plate 242, and the sphere 110 is disposed inside the rib 244. Yes.

  In the seismic isolation device 250 of the fifth embodiment, as shown in FIG. 11, a circular recess 254 is formed on the lower surface of the upper plate 252, and the sphere 110 is disposed in the recess 254.

  In the seismic isolation device 260 of the sixth embodiment, as shown in FIG. 12, a square rib 264 hanging downward is formed on the lower surface of the upper plate 262, and the sphere 110 is arranged inside the rib 254. Yes.

  In the seismic isolation device 270 of the seventh embodiment, as shown in FIG. 13, a square recess 274 is formed on the lower surface of the upper plate 272, and the sphere 110 is disposed in the recess 274.

  In the seismic isolation device 280 of the eighth embodiment, as shown in FIG. 14, rhombus-shaped ribs 284 that are suspended downward are formed on the lower surface of the upper plate 282, and are lined up in a staggered manner inside the ribs 284. A sphere 110 is arranged.

  In the seismic isolation device 290 of the ninth embodiment, as shown in FIG. 15, a rhombus-shaped recess 294 is formed on the lower surface of the upper plate 292, and the spheres 110 arranged in a staggered manner are arranged in the recess 294. Has been.

  As shown in FIG. 16, the seismic isolation device 300 according to the tenth embodiment is formed with a rectangular rib 284 that hangs downward on the lower surface of the upper plate 302, and a sphere lined up in a staggered manner inside the rib 284. 110 is arranged.

  In the seismic isolation device 310 of the eleventh embodiment, as shown in FIG. 17, a rectangular recess 314 is formed on the lower surface of the upper plate 312, and the spheres 110 arranged in a staggered manner are arranged in the recess 314. Has been.

  Next, the operation of the fourth to eleventh embodiments will be described.

  The seismic isolation devices 240, 250, 260, 270, 280, 290, 300, 310 of the fourth to eleventh embodiments are provided by ribs 244, 264, 284, 304 or recesses 254, 274, 294, 314, respectively. The rolling of the sphere 110 is restricted. Therefore, the sphere 110 does not roll more than necessary.

  The seismic isolation devices 240, 250, 260, 270, 280, 290, 300, 310 of the fourth to eleventh embodiments are arranged on the upper plates 242, 252, 262, 272, 282, 292, 302, 312. The ribs 244, 264, 284, 304 or the recesses 254, 274, 294, 314 are provided, but the lower plate 104 may be provided with similar ribs and recesses. Or you may provide both upper and lower sides.

  Next, the seismic isolation device 320 of the twelfth embodiment will be described.

  As shown in FIG. 18, a plate-like intermediate body 322 is placed on the upper surface of the lower plate 104. The intermediate body 322 is made of polyvinyl chloride or the like, and can slide on the upper surface of the lower plate 104 very smoothly.

  A round hole 322A slightly larger than the diameter of the sphere 110 is formed in the intermediate body 322, and the sphere 110 is contained in the circle 322A.

  The lower plate 104 and the upper plate 102 hold the sphere 110 in a compressed state.

  Note that the thickness of the intermediate body 322 is smaller than the gap between the upper plate 102 and the lower plate 104 even when the sphere 110 is deformed and crushed by vibration or the like in a state where the sphere 110 is compressed. (The upper plate 102 and the lower plate 104 do not grip the intermediate body 322).

  Further, as described above, the intermediate body 322 slides on the upper surface of the lower plate 104 very smoothly. Therefore, as the sphere 110 rolls in the horizontal direction, the intermediate body 322 also moves in the horizontal direction. That is, the intermediate body 322 does not hinder elastic deformation of the sphere 110 and rolling in the horizontal direction. In other words, the intermediate 322 does not disturb the seismic isolation effect.

  Next, the effect | action of the seismic isolation apparatus 320 of 12th embodiment is demonstrated.

  The placement position of the sphere 110 is determined by inserting it into the round hole 32A of the intermediate body 322. Therefore, the sphere 110 can be easily arranged at a predetermined position.

  Further, as the sphere 110 rolls in the horizontal direction, the intermediate body 322 also moves in the horizontal direction. Accordingly, the entire spheres 110 arranged in a lattice shape are moved together with the arrangement positions thereof being maintained. For this reason, the positional relationship of the arrangement of the spheres 110 does not collapse.

  Next, the seismic isolation device 330 according to the thirteenth embodiment will be described.

  19 and 20 show a seismic isolation device 330 according to the thirteenth embodiment. The vertical direction is the Z direction. The horizontal plane is the XY plane. The X direction and the Y direction are orthogonal to each other.

  As shown in FIGS. 19 and 20, in the seismic isolation device 330, dampers 332 </ b> A, 332 </ b> B, and 334 </ b> A, 334 </ b> B are joined to two opposite sides of the upper surface of the lower plate 104. The dampers 332A, B and 334A, B are also joined to the lower surface of the plate-like intermediate member 340.

  The dampers 332A, B and 334A, B have a shape in which a belt-shaped steel plate is bent and the U-shape is set sideways, and the U-shaped openings are arranged so as to face each other (to face the inside). Further, the joint portion is a region near the tip portions of the dampers 332A, B and 334A, B.

  Therefore, the dampers 332A, B and 334A, B are elastically deformed in the vertical direction Z and the Y direction, which is the winding direction. In other words, it hardly deforms in the X direction.

  On the other hand, the damper 336A, the damper 336B, the damper 338A, and the damper 338B are joined to the two opposite side portions of the lower surface of the upper plate 102 in the same manner. The dampers 336A, B and 338A, B are also joined to the upper surface of the intermediate member 340.

  The two sides where the dampers 336A, B and 338A, B are joined are two sides different from the two sides where the dampers 332A, B, and 334A, B are joined to the upper surface of the lower plate 104. .

  The dampers 336A, B and 338A, B are also formed by bending a belt-shaped steel plate and having a U-shaped sideways, and the U-shaped openings are arranged so as to face each other (toward the inside). Further, the joint portion is a region in the vicinity of the tip ends of the dampers 336A, B and 338A, B.

  Therefore, the dampers 336A, B and 338A, B are elastically deformed in the vertical direction Z and the X direction, which is the winding direction. In other words, it hardly deforms in the Y direction.

  A square hole 340A is formed in the central portion of the intermediate member 340, and the sphere 110 is disposed in the hole 340A. Note that the hole 340A is sufficiently large so as not to hinder the rotational movement of the sphere 110. In addition, the end where the dampers 332A, B and 334A, B are joined is bent and is located higher than the surface where the hole 340A is formed. The end where the dampers 336A, B and 338A, B are joined is the surface on which the hole 340A is formed.

  Next, the effect | action of the seismic isolation apparatus 330 of 13th embodiment is demonstrated.

  Since the seismic isolation device 330 has such a configuration, the upper plate 102 can move only in the X direction relative to the intermediate member 340. Further, the lower plate 104 can move relative to the intermediate member 340 only in the Y direction. Therefore, the upper plate 102 and the lower plate 104 are relatively movable in the X direction and the Y direction, but the relatively rotating (twisting) movement with the Z axis as the rotation axis is constrained.

  Therefore, the dampers 332A, B, 334A, B, 336A, B, 338A, B cause the foundation 12 (see FIG. 1) and the building body 14 (see FIG. 1) to rotate (twist) due to an earthquake or the like. ) Even if force is applied, rotation (twisting) is prevented. Therefore, no twisting force is applied to the sphere 110. For this reason, the fracture | rupture etc. by the spherical body 110 being twisted are prevented.

  Further, the dampers 332A, B, 334A, B, 336A, B, 338A, B also have a restoring force characteristic that the building body 14 returns to the original position after the vibration due to the earthquake or the like is finished.

  The dampers 332A, B, 334A, B, 326A, B, 338A, B are also elastically deformed, but their elastic force is smaller than the elastic force of the sphere 110. That is, the dampers 332A, B, 334A, B, 336A, B, 338A, B do not interfere with the seismic isolation effect by the sphere 110.

It is a figure which shows the house provided with the seismic isolation apparatus of 1st embodiment of this invention. It is a disassembled perspective view of a house provided with the seismic isolation apparatus of 1st embodiment of this invention. It is a disassembled perspective view which shows the principal part of a house provided with the seismic isolation apparatus of 1st embodiment of this invention. It is the figure which observed the seismic isolation apparatus of 1st embodiment of this invention from the inspection window of the flooring. The seismic isolation apparatus of 1st embodiment of this invention is shown, (A) is a perspective view, (B) is a top view. It is the side view which showed a mode that the seismic isolation apparatus of 1st embodiment of this invention temporarily fixes in order from (A) to (C). (A) shows the behavior of the sphere when the relative movement amount between the lower plate and the upper plate is within the elastic deformation range of the sphere, and (B) shows the elastic displacement of the sphere when the relative movement amount between the lower plate and the upper plate is shown. It is a side view which shows the behavior of the sphere when it exceeds the range. (A) is a side view showing a state in which the sphere is normally arranged and compressed and deformed, (B) is a side view showing a state in which the sphere is excessively crushed, and (C) is a normal state in which the sphere is rolled. It is a side view which shows the state shifted from arrangement | positioning. (A) is a top view of the seismic isolation device of 2nd embodiment of this invention, (B) is a top view of the seismic isolation device of 3rd embodiment of this invention. The seismic isolation apparatus of 4th embodiment of this invention is shown, (A) is a top view, (B) is sectional drawing. The seismic isolation apparatus of 5th embodiment of this invention is shown, (A) is a top view, (B) is sectional drawing. The seismic isolation apparatus of 6th embodiment of this invention is shown, (A) is a top view, (B) is sectional drawing. The seismic isolation apparatus of 7th embodiment of this invention is shown, (A) is a top view, (B) is sectional drawing. The seismic isolation apparatus of 8th embodiment of this invention is shown, (A) is a top view, (B) is sectional drawing. The seismic isolation apparatus of 9th embodiment of this invention is shown, (A) is a top view, (B) is sectional drawing. The seismic isolation apparatus of 10th embodiment of this invention is shown, (A) is a top view, (B) is sectional drawing. The seismic isolation apparatus of the 11th embodiment of the present invention is shown, (A) is a top view and (B) is a sectional view. The seismic isolation apparatus of the 12th embodiment of this invention is shown, (A) is a top view in the state except an upper board, (B) is sectional drawing. The seismic isolation apparatus of 13th embodiment of this invention is shown, (A) is a top view in the state except an upper board, (B) is sectional drawing. It is a disassembled perspective view which shows the seismic isolation apparatus of 13th embodiment of this invention.

Explanation of symbols

10 Housing (Seismic isolation structure)
12 Foundation 14 Building body 18 Flooring (floor)
20 Inspection window (Inspection port)
102 Upper plate (moving member)
100 Seismic isolation device 104 Lower plate (moving member)
110 Sphere (Rotating body)
110A Contact surface 122 mark line 124 mark line 132 mark circle (mark)
134 stamp circle (mark)
220 Seismic isolation device 230 Seismic isolation device 240 Seismic isolation device 244 Rib (regulation means)
250 Seismic isolation device 254 Concavity (regulation means)
260 Seismic isolation device 264 Rib (regulation means)
270 Seismic isolation device 274 Concavity (regulation means)
280 Seismic isolation device 284 Rib (regulatory means)
290 Seismic isolation device 294 Concavity (regulation means)
300 Seismic isolation device 304 Rib (regulation means)
310 Seismic isolation device 314 Concavity (regulation means)
320 Seismic isolation device 322 Intermediate 330 Seismic isolation device 332A Damper (second joint member)
332B damper (second bonding member)
334A damper (second joint member)
334B damper (second joint member)
336A damper (first joint member)
336B Damper (first joining member)
336A damper (first joint member)
338B damper (first joint member)
340 Intermediate member

Claims (12)

An elastically deformable rotating body having a damping function;
A pair of moving members that are movable relative to each other and grip the rotating body in a compressed and deformed state;
A transparent part that constitutes part or all of the upper moving member, abutting the abutting surface of the rotating body compressed and deformed, and observing the abutting surface from above;
A mark indicating the size of the contact surface when the rotating body is compressed and deformed at a predetermined compression rate provided in the transparent portion;
A seismic isolation device comprising: The seismic isolation device according to claim 1, wherein the transparent portion is provided with a mark line capable of determining whether or not the rotating body is at a predetermined position . 3. A restricting means for restricting horizontal movement of the rotating body is provided on one or both of the upper moving member and the lower moving member. The seismic isolation device according to any one of the above . An intermediate that is movable in the horizontal direction is provided between the moving members,
The said intermediate body maintains the arrangement | positioning relationship of the said rotary body, The seismic isolation apparatus of any one of Claims 1-3 characterized by the above-mentioned . The seismic isolation device according to any one of claims 1 to 3, further comprising a rotation restricting unit that restricts relative rotation between the upper moving member and the lower moving member. . The rotation restricting means is
An intermediate member provided between the upper moving member and the lower moving member;
A first joining member that connects the upper moving member and the upper surface of the intermediate member, and is deformable in a vertical direction and an X direction on a horizontal plane perpendicular to the vertical direction;
A second joining member that connects the lower moving member and the lower surface of the intermediate member, and is deformable in a vertical direction and a Y direction perpendicular to the X direction on a horizontal plane perpendicular to the vertical direction;
The seismic isolation device according to claim 5, comprising: The seismic isolation device according to claim 1, wherein the rotating body is made of silicone rubber . The seismic isolation device according to claim 1, wherein the rotating body is a sphere .   A seismic isolation structure comprising the seismic isolation device according to any one of claims 1 to 8. The seismic isolation structure according to claim 9, wherein the seismic isolation device is disposed between a foundation provided on the ground and a building main body . The seismic isolation structure according to claim 10, wherein an inspection port through which the contact surface can be observed is provided in a floor portion of the building main body .   A seismic isolation method for constructing the seismic isolation structure according to any one of claims 9 to 11,
  Temporarily fixing the pair of moving members in a state where the rotating body is compressed and deformed in advance,
  The seismic isolation method, wherein the temporary fixing is released after the seismic isolation structure is constructed.

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