JP2008002606A - Three-dimensional base isolation device, base isolation method, rolling seal member, and seal method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a three-dimensional base isolation device with an upper face base isolator reduced in size as a whole. <P>SOLUTION: The three-dimensional base isolation device 1 comprises a vertical base isolator 2 and a horizontal base isolator 20 mounted between a base 25 and a base isolated object 35. The vertical base isolator 2 is composed of an inner cylinder 4 and an outer cylinder 6 relatively displaced following vertical relative displacement between the base 25 and the base isolated object 35, and a rolling seal member 15 which is mounted between the inner cylinder 4 and the outer cylinder 6 in a U-bent state for sealing both cylinders 4, 6, also deformed following relative displacement between both the cylinders 4, 6, and which has a seal portion 16 formed of a raw material having air-tightness and a reinforcing portion 17 formed of a raw material supporting predetermined pressure and laid thereon in a non-adhesive state. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a three-dimensional seismic isolation device, a seismic isolation method, a rolling seal member, and a sealing method, and in particular, a three-dimensional seismic isolation device formed by connecting a horizontal seismic isolation device and a vertical seismic isolation device in series, and the three-dimensional The present invention relates to a seismic isolation method using a seismic isolation device, a rolling seal member used for the vertical seismic isolation device, and a sealing method using the rolling seal member.

  As an example of a three-dimensional seismic isolation device, in Patent Documents 1 and 2, as shown in FIG. 6, an air spring type vertical seismic isolation device 42 provided on the foundation 55 side and a vertical seismic isolation device 42 are connected in series. In addition, a three-dimensional seismic isolation device 41 including a laminated rubber horizontal seismic isolation device 50 provided on the seismic isolation object 60 side is disclosed.

  In the three-dimensional seismic isolation device 41 having such a configuration, the vertical seismic isolation device 42 includes an outer container 43 fixed in a hole 56 provided in the foundation 55, and a vertical relative to the inner side of the outer container 43. An inner container 44 that is movably provided, and provided between the inner container 44 and the outer container 43 to seal between the containers 44 and 43, and to follow the relative movement of the containers 44 and 43 in the vertical direction. A rolling seal member 45 that is deformed in a vertical direction and a fluid chamber 46 formed in the inner portion of the inner container 44 and the outer container 43, and the fluid chamber 46 is filled with a predetermined amount of air 10. .

  In this case, the rolling seal member 45 is formed in an integral structure formed by laminating a plurality of rubber layers and reinforcing fiber layers, and is folded in two from the middle portion so that the folded portion protrudes upward. In this state, the inner and outer peripheral edge portions are airtightly connected to the inner container 44 side and the outer container 43 side.

  The horizontal seismic isolation device 50 includes a laminated rubber 51 formed by alternately laminating a plurality of steel plates and rubber plates, and the laminated rubber 51 is divided into an upper part of the inner container 44 of the vertical seismic isolation device 42 and a seismic isolation object. It is connected in series with the vertical seismic isolation device 42 by being interposed between the lower part of 60.

Further, Patent Document 3 discloses a hydraulic support device applicable to a three-dimensional seismic isolation device. The hydraulic support device is fitted into a cylinder and movably up and down in the cylinder, and is supported by hydraulic pressure. And a support rod that fits into the upper part of the cylinder, has an upper end fixed to the supported structure, and a lower end that is in contact with the upper surface of the piston through a spherical surface. Between them, a spherical plain bearing is provided.
JP 2004-68453 A JP 2005-16633 A Japanese Patent Laid-Open No. 11-230258

  By the way, among the various three-dimensional seismic isolation devices configured as described above, in the three-dimensional seismic isolation device 41 disclosed in Patent Documents 1 and 2, the rolling seal member 45 has a predetermined pressure resistance. In order to ensure, it is formed in an integral structure formed by laminating a plurality of rubber layers and reinforcing fiber layers. For this reason, the thickness increases, the radius of curvature of the bent portion when bent into a U-shape increases, and a gap between the inner container 44 and the outer container 43 in which the rolling seal member 45 is interposed must be increased. In other words, the vertical seismic isolation device 42 is increased in size.

  In addition, since one horizontal seismic isolation device 50 is connected in series to one vertical seismic isolation device 42, if the vertical seismic isolation device 42 becomes unsupportable for some reason, it is subject to seismic isolation. It becomes difficult to continue supporting the load from the object 60.

  Further, among vibrations caused by earthquakes or the like input to the foundation 55, horizontal vibrations are input from the outer container 43 of the vertical seismic isolation device 42 to the horizontal seismic isolation device 50 through the rolling seal member 45 and the inner container 44. For this reason, the vertical seismic isolation device 42 having the vertical seismic isolation function is also burdened with a horizontal force, so that the vertical seismic isolation device 42 is forced to be overdesigned.

  Furthermore, in the hydraulic support device disclosed in Patent Document 3, the piston portion used at high pressure and the swivel portion that absorbs rotational deformation from the seismic isolation object require precise machining. Therefore, the cost is very high.

  The present invention has been made in view of the conventional problems as described above, and can be reduced in size as a whole. Furthermore, even if a part of the vertical seismic isolation device becomes unsupportable, the seismic isolation To provide a three-dimensional seismic isolation device, a seismic isolation method, a rolling seal member, and a sealing method that can continue to support a load from an object and can reliably absorb vibration input from a foundation. Objective.

In order to solve the above problems, the present invention employs the following means.
That is, the invention according to claim 1 is a three-dimensional seismic isolation device in which a vertical seismic isolation device and a horizontal seismic isolation device are interposed between a foundation and a seismic isolation object, the vertical seismic isolation device. The device was bent in a U-shape between the inner cylinder and the outer cylinder, and the inner cylinder and the outer cylinder, which are relatively displaced following the relative displacement in the vertical direction between the foundation and the seismic isolation object. A seal portion made of an airtight material and a reinforcing portion made of a material that supports a predetermined pressure, which is inserted in a state and seals between both cylinders and deforms following the relative displacement of both cylinders. It is characterized by comprising a rolling seal member stacked in an adhesive state.

  According to the three-dimensional seismic isolation device according to the present invention, the rolling seal member of the vertical seismic isolation device is overlapped in a non-adhering state with a seal portion made of an airtight material and a reinforcement portion made of a material supporting a predetermined pressure. Therefore, the pressure acting on the rolling seal member can be received by the reinforcing portion. Therefore, since the seal portion only needs to be airtight, the seal portion can be thinned, the radius of curvature of the bent portion of the rolling seal member can be reduced, and the inner portion of the rolling seal member can be interposed. Since the gap between the cylinder and the outer cylinder can be set small and the tension of the seal portion of the rolling seal member can be kept low, high pressure can be achieved. In addition, the vertical seismic isolation device can be reduced in size in a planar manner.

  The invention according to claim 2 is the three-dimensional seismic isolation device according to claim 1, wherein a plurality of the vertical seismic isolation devices are arranged in parallel.

  According to the three-dimensional seismic isolation device according to the present invention, since the load from the seismic isolation object can be supported by the plurality of vertical seismic isolation devices arranged in parallel, any one of the vertical seismic isolation devices is supported for some reason. Even if it becomes impossible, the load from the seismic isolation object can continue to be supported by other vertical seismic isolation devices, and safety can be ensured.

  The invention according to claim 3 is the three-dimensional seismic isolation device according to claim 2, wherein the plurality of vertical seismic isolation devices are housed in a common casing.

  The invention according to claim 4 is the three-dimensional seismic isolation device according to claim 2 or 3, wherein the vertical seismic isolation device and the horizontal seismic isolation device are provided between the foundation and the seismic isolation object. It is characterized by interposing in series.

  According to the three-dimensional seismic isolation device of the present invention, among the vibrations caused by earthquakes and the like input to the foundation, horizontal vibration is input to the horizontal seismic isolation device via the casing, so that the load transmission mechanism becomes clear. In addition, the design of the vertical seismic isolation device can be simplified (reduction of the member thickness, etc.).

  The invention according to claim 5 is the three-dimensional seismic isolation device according to any one of claims 1 to 4, wherein an outer side of an internal fluid chamber comprising an inner cylinder, an outer cylinder and a rolling seal member of the vertical seismic isolation device. And at least one external fluid chamber, and the external fluid chamber is connected to the internal fluid chamber via a pipe.

  According to the three-dimensional seismic isolation device of the present invention, the vertical seismic isolation device supports the load from the seismic isolation object by the combined volume of the internal fluid chamber and the at least one external fluid chamber. The volume of the internal fluid chamber can be set smaller than the vertical seismic isolation device that supports the load only by the volume of one fluid chamber, and the vertical seismic isolation device can be downsized in the height direction.

  The invention according to claim 6 is the three-dimensional seismic isolation device according to any one of claims 1 to 5, wherein the rolling seal member is bent in a U-shape and a bent portion is downward. It is provided between the inner cylinder and the outer cylinder so as to protrude.

  According to the three-dimensional seismic isolation device according to the present invention, foreign matter such as dust does not accumulate in the inner portion of the rolling seal member, and therefore the operation of the rolling seal member is hindered by foreign matter such as dust. Absent.

  The invention according to claim 7 is the three-dimensional seismic isolation device according to any one of claims 1 to 6, wherein a compressive fluid is accommodated in the entire outer fluid chamber and the inner fluid chamber. Features.

  The invention according to claim 8 is the three-dimensional seismic isolation device according to any one of claims 1 to 6, wherein the external fluid chamber is constituted by an accumulator having an incompressible fluid chamber and a compressible fluid chamber. The incompressible fluid chamber of the accumulator and the internal fluid chamber are connected via a pipe, and the incompressible fluid chamber and the internal fluid chamber of the accumulator are filled with the incompressible fluid, respectively. It is characterized by that.

According to the three-dimensional seismic isolation device of the present invention, the pressure due to the load from the seismic isolation object is compressed by the accumulator through the incompressible fluid in the internal fluid chamber and the incompressible fluid in the incompressible fluid chamber of the accumulator. It is transmitted to the compressive fluid in the compressive fluid chamber. In this case, since the incompressible fluid in the internal fluid chamber and in the incompressible fluid chamber of the accumulator is in contact with the rolling seal member, the fluid from the rolling seal member is compared with the case where the compressive fluid is used. Leakage can be greatly reduced.
The compressible fluid is a gas such as air or nitrogen gas, and the incompressible fluid is a liquid such as water or oil.

  The invention according to claim 9 is a seismic isolation method for isolating the seismic isolation object supported by the foundation by absorbing vibration caused by an earthquake or the like input to the foundation. A three-dimensional seismic isolation device is interposed between the foundation and the seismic isolation object, the vertical vibration from the foundation is absorbed by the vertical seismic isolation device, and the horizontal vibration from the foundation is absorbed by the horizontal seismic isolation device. It is characterized by absorbing by.

  According to the seismic isolation method of the present invention, among vibrations caused by earthquakes or the like input to the foundation, vertical vibrations are absorbed by the vertical seismic isolation device, and horizontal vibrations are absorbed by the horizontal seismic isolation device. .

  The invention according to claim 10 is an internal fluid which is interposed in a U-shaped state between one member and the other member which are provided so as to be capable of relative displacement, and is sealed in an inner portion of both members. A rolling seal member that forms a chamber and deforms following the relative displacement of both members, and is formed of an airtight material provided facing the internal fluid chamber, and the seal portion And a reinforcing portion formed from a material that supports a predetermined pressure and is provided in a non-adhered state.

  According to the rolling seal member of the present invention, the seal portion made of a material having airtightness and the reinforcement portion made of a material that supports a predetermined pressure are overlapped in a non-adhered state, so that it acts on the rolling seal member. The pressure to be received can be received by the reinforcing portion. Accordingly, since the seal portion only needs to be airtight, the seal portion can be thinned, the radius of curvature of the bent portion of the rolling seal member can be reduced, and the rolling seal member can be interposed. The gap between this member and the other member can be set small.

  The invention according to claim 11 is a sealing method for sealing between two members so as to form a sealed internal fluid chamber in an inner portion of two members provided so as to be capable of relative displacement. A seal portion formed from a material having airtightness facing the internal fluid chamber is provided, and a reinforcement portion formed from a material that supports a predetermined pressure in a non-adhered state is provided outside the seal portion. It is characterized by.

  As described above, according to the three-dimensional seismic isolation device and the seismic isolation method of the present invention, the rolling seal member of the vertical seismic isolation device is made of a seal portion made of an airtight material and a material that supports a predetermined pressure. Since the reinforcing part made of is stacked in a non-bonded state, the pressure acting on the rolling seal member can be received by the reinforcing part. Therefore, since the seal portion only needs to be airtight, the seal portion can be thinned, the radius of curvature of the bent portion of the rolling seal member can be reduced, and the inner portion of the rolling seal member can be interposed. Since the gap between the cylinder and the outer cylinder can be set small and the tension of the seal portion of the rolling seal member can be kept low, high pressure can be achieved. In addition, the vertical seismic isolation device can be reduced in size in a planar manner.

  In addition, since the load from the seismic isolation object can be supported by a plurality of vertical seismic isolation devices arranged in parallel, even if any vertical seismic isolation device becomes unsupportable due to some reason, Since the vertical seismic isolation device can continue to support the load from the seismic isolation object, safety can be ensured.

  Furthermore, among the vibrations caused by earthquakes, etc. that are input to the foundation, horizontal vibrations are input to the horizontal seismic isolation device via the casing, making the load transmission mechanism clear and simplifying the design of the vertical seismic isolation device (Reducing member thickness, etc.).

  Furthermore, since the vertical seismic isolation device supports the load from the seismic isolation object by the combined volume of the internal fluid chamber and at least one external fluid chamber, the load is supported only by the volume of one fluid chamber. The volume of the internal fluid chamber can be set smaller than the vertical seismic isolation device, and the vertical seismic isolation device can be downsized in the height direction.

  Furthermore, since foreign matters such as dust do not accumulate inside the rolling seal member, the operation of the rolling seal member is not hindered by foreign matters such as dust.

  Further, since the incompressible fluid in the internal fluid chamber and the incompressible fluid chamber of the accumulator comes into contact with the rolling seal member, the fluid from the rolling seal member is more in comparison with the case where the compressive fluid is used. Leakage can be greatly reduced.

  Furthermore, according to the rolling seal member and the sealing method of the present invention, since the seal portion made of a material having airtightness and the reinforcement portion made of a material supporting a predetermined pressure are overlapped in a non-adhered state, The pressure acting on the rolling seal member can be received by the reinforcing portion. Therefore, since the seal portion only needs to be airtight, the seal portion can be thinned, the radius of curvature of the bent portion of the rolling seal member can be reduced, and the inner portion of the rolling seal member can be interposed. Since the gap between the cylinder and the outer cylinder can be set small and the tension of the seal portion of the rolling seal member can be kept low, high pressure can be achieved. In addition, the vertical seismic isolation device can be reduced in size in a planar manner.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a first embodiment of a three-dimensional seismic isolation device according to the present invention. FIG. 1 is a schematic longitudinal sectional view showing the entire three-dimensional seismic isolation device, and FIG. FIG. 3 is a partially enlarged view of FIG.

  That is, the three-dimensional seismic isolation device 1 shown in the present embodiment is interposed between the seismic isolation object 35 such as a building and the foundation 25 that supports the seismic isolation object 35, and is seismically isolated from the foundation 25. This is for absorbing vibration caused by an earthquake or the like to be transmitted to the object 35, and is connected in series to a plurality of vertical spring isolation devices 2 of an air spring system arranged in parallel and a plurality of vertical isolation devices 2. One horizontal seismic isolation device 20 of a laminated rubber system connected to the

  A casing 30 is integrally provided on the upper portion of the foundation 25, and a plurality of vertical seismic isolation devices 2 are arranged in parallel inside the casing 30, and the seismic isolation located above the casing 30 and above the foundation 25. One horizontal seismic isolation device 20 is interposed in series with the plurality of vertical seismic isolation devices 2 between the lower part of the object 35.

The casing 30 includes a bottom plate 31 fixed to the upper portion of the base 25, a cylindrical side wall 32 erected perpendicularly to the upper portion of the bottom plate 31, and a bottom wall 31. And a movable plate 34 provided inside the side wall 32 so as to be movable in the vertical direction. A plurality of (this embodiment) is provided between the upper portion of the bottom plate 31 and the lower portion of the movable plate 34. In the embodiment, three vertical seismic isolation devices 2 are arranged in parallel, and one horizontal seismic isolation device 20 is arranged in series on the upper part of the moving plate 34 with respect to the three vertical seismic isolation devices 2.
In the present embodiment, three vertical seismic isolation devices 2 are arranged in parallel, but although not shown, two or four or more vertical seismic isolation devices 2 may be arranged in parallel. .

  Between the peripheral surface of the moving plate 34 of the casing 30 and the inner surface of the side wall 32, you may provide the guide means (not shown) for guiding the moving plate 34 so that it can move smoothly up and down. As the guide means, for example, a plurality of rollers can be cited, and the plurality of rollers are provided on the peripheral surface of the moving plate 34 and brought into contact with the inner surface of the side wall 32 so that the moving plate 34 can move smoothly in the vertical direction. Guided to be movable. Note that the guiding means is not limited to the above, and any means that can guide the movable plate 34 so as to be smoothly movable in the vertical direction may be used.

  Each of the vertical seismic isolation devices 2 includes a cylindrical inner cylinder 4 that is vertically fixed to the upper part of the bottom plate 31 of the casing 30 via a disk-shaped lower plate 3, and a predetermined gap outside the inner cylinder 4. Provided between the inner cylinder 4 and the outer cylinder 6, and the cylindrical outer cylinder 6 that is vertically fixed to the lower part of the moving plate 34 of the casing 30 via the disk-shaped upper plate 5. A rolling seal member 15 that seals between them, an internal fluid chamber 7 that is provided in an airtight state inside the inner cylinder 4 and the outer cylinder 6, and an external fluid chamber that includes a gas cylinder or the like disposed outside the casing 30. 8 and a pipe 9 for connecting the internal fluid chamber 7 and the external fluid chamber 8 to each other.

 The internal fluid chamber 7 and the external fluid chamber 8 of each vertical seismic isolation device 2 are filled with a predetermined amount of gas 10 such as air, and the internal fluid chamber 7 and the external fluid chamber 8 function as air springs. Thus, the load from the seismic isolation object 35 is elastically supported. By elastically supporting the load from the seismic isolation object 35 by each vertical seismic isolation device 2, the gas 10 such as air in the internal fluid chamber 7 and the external fluid chamber 8 is compressed, and this pressure is applied to the rolling seal member 15. Works.

  In the present embodiment, since the three vertical isolator 2 are arranged in parallel and the total load from the seismic isolation object 35 is supported by the three vertical isolator 2, each vertical isolator The load from the seismic isolation object 35 acts on 2 by 1/3. Therefore, it is only necessary to set a volume in which the internal fluid chamber 7 and the external fluid chamber 8 of each vertical seismic isolation device 2 are combined with a volume capable of supporting this 1/3 load.

  Each vertical seismic isolation device 2 has an inner cylinder 4 fixed to the bottom plate 31 of the casing 30 and an outer cylinder 6 fixed to the moving plate 34 of the casing 30 so that the base 25 and the seismic isolation object 35 are vertically moved. The inner cylinder 4 and the outer cylinder 6 are displaced relative to each other in the vertical direction following the relative displacement in the direction, and the inner fluid chamber 7 and the external fluid are displaced by the relative displacement between the inner cylinder 4 and the outer cylinder 6 in the vertical direction. The gas 10 such as air in the chamber 8 is expanded and contracted, and the vertical vibration input to each vertical seismic isolation device 2 from the base 25 through the casing 30 is absorbed by the expansion and contraction of the gas 10 such as air.

  As shown in FIG. 3, the rolling seal member 15 is formed in a U shape by bending a belt-shaped member from an intermediate portion in the width direction, and the bent portion 18 projects downward from the U-shaped member. As described above, the inner cylinder 4 and the outer cylinder 6 are interposed in the gap, and in this state, both ends are hermetically connected to the upper ends of the inner cylinder 4 and the outer cylinder 6, respectively. It is configured to seal between the inner cylinder 4 and the outer cylinder 5 by airtightly connecting the parts, and follows the relative displacement in the vertical direction between the inner cylinder 4 and the outer cylinder 6. Are configured to be deformed in the vertical direction.

  The rolling seal member 15 includes a strip-shaped seal portion 16 formed of a material having airtightness, and a strip-shaped reinforcement portion 17 formed of a material capable of supporting a predetermined pressure by having a predetermined tensile strength on the outside thereof. Are overlapped in a non-adhered state, and are bent into a U-shape from the intermediate portion in the width direction so that the seal portion 16 is located inside, and in this state, the inner cylinder 4 and the outer cylinder 6 It is inserted in the gap between.

  Examples of the material of the seal portion 16 of the rolling seal member 15 include highly airtight and flexible materials such as natural rubber, synthetic rubber, and synthetic resin. Examples of the material of the reinforcing portion 17 include materials that have high tensile strength and can be flexibly deformed in the out-of-plane direction, such as aramid fibers and tetrafluoroethylene resin sheets. However, the present invention is not limited to these, and any device having the same function may be used.

  By interposing the rolling seal member 15 in the gap between the inner cylinder 4 and the outer cylinder 6, the space between the cylinders 4 and 6 is sealed by the seal portion 16 of the rolling seal member 15, and the internal fluid chamber 7 and the outside The airtightness of the gas 10 such as air filled in the fluid chamber 8 can be enhanced.

  In this case, the gas 10 such as the air in the internal fluid chamber 7 and the external fluid chamber 8 of the vertical seismic isolation device 2 is compressed by the load from the seismic isolation object 35, and the pressure of this gas acts on the seal portion 16. However, since the reinforcing portion 17 that supports a predetermined pressure is provided outside the seal portion 16 in a non-bonded state, the pressure is received by the reinforcing portion 17.

  Therefore, it is not necessary to set the seal portion 16 to have a strength that can withstand the pressure from the internal fluid chamber 7 and the external fluid chamber 8, and the seal portion 16 can only have airtightness that can prevent leakage of the gas 10 such as air. Therefore, the seal portion 16 can be thinned, the radius of curvature of the bent portion 18 of the rolling seal member 15 can be reduced, and the inner cylinder 4 and the outer cylinder 6 that interpose the rolling seal member 15 can be reduced. The gap between them can be set small.

  The vertical seismic isolation device 2 receives a load from the vibration isolation object 35, and the gas 10 such as the air in the internal fluid chamber 7 and the external fluid chamber 8 is compressed. It is preferable that the dimension of the reinforcing part 17 when it is extended is obtained in advance, and the dimension of the seal part 16 is set in accordance with the dimension of the reinforcing part 17. In this way, by setting the dimensions of the reinforcing portion 17 and the seal portion 16 in advance, the pressure strength of the seal portion 16 need not be considered.

  In the present embodiment, the gap between the inner cylinder 4 and the outer cylinder 6 is about 10 mm even in consideration of the thickness of the seal portion 16 and the thickness of the reinforcing portion 17 of the rolling seal member 15. Compared with the gap (50 mm) of the described three-dimensional seismic isolation device, the gap was significantly reduced.

  The horizontal seismic isolation device 20 is a laminated rubber 21 configured by alternately laminating steel plates and rubber plates, and is interposed between the upper part of the moving plate 34 of the casing 30 and the lower part of the seismic isolation object 35. In this state, the lower flange 22 of the lower end of the laminated rubber 21 is fixed to the upper part of the moving plate 34 of the casing 30, and the upper flange 23 of the upper end is fixed to the lower part of the seismic isolation object 35, thereby arranging three in parallel. The vertical seismic isolation device 2 is connected in series.

  Horizontal vibration due to an earthquake or the like input to the foundation 25 is input to the horizontal seismic isolation device 20 via the bottom plate 31, the side wall 32, and the moving plate 34 of the casing 30, and the horizontal seismic isolation device is generated by the horizontal vibration. 20 is displaced in the horizontal direction and the vibration in the horizontal direction is absorbed. In this case, since the horizontal vibration from the foundation 25 is directly input to the horizontal seismic isolation device 20 through the casing 30, the horizontal vibration is input to the vertical seismic isolation device 2 to The seismic isolation function of the seismic device 2 is not affected, and the design of the inner cylinder 4 and the outer cylinder 6 of the vertical seismic isolation device 2 need only confirm the pressure.

  In the three-dimensional vibration isolator 1 according to the present embodiment configured as described above, the rolling seal member 15 includes a sealing portion 16 made of an airtight material and a reinforcing portion made of a material that supports a predetermined pressure. 17 is superposed in a non-adhered state and is configured so that the pressure from the internal fluid chamber 7 and the external fluid chamber 8 is received by the reinforcing portion 17, so that the seal portion 16 only needs to be airtight. . Therefore, since the seal part 16 can be thinned, the radius of curvature of the bent part 18 of the rolling seal member 15 can be set small, and the inner cylinder 4 and the outer cylinder 6 between which the rolling seal member 15 is interposed can be set. Since the gap between them can be reduced and the tension of the seal portion 16 of the rolling seal member 15 can be kept low, it is possible to increase the pressure. Moreover, the vertical seismic isolation device 2 can be reduced in size in a plane.

  In addition, since the external fluid chamber 8 is disposed outside the casing 30 and the external fluid chamber 8 is connected to the internal fluid chamber 7 via the pipe 9, the vertical seismic isolation composed of only one fluid chamber is provided. Compared with the device, the volume of the internal fluid chamber 7 can be significantly reduced, and thus the vertical seismic isolation device 2 can be downsized in the height direction.

  Further, since a plurality of vertical seismic isolation devices 2 are arranged in parallel, even if any of the vertical seismic isolation devices 2 becomes unsupportable for some reason, Since the load from the seismic isolation object 35 can be continuously supported, safety can be ensured.

  Furthermore, the rolling seal member 15 is interposed between the inner cylinder 4 and the outer cylinder 6 so that the bent portion 18 protrudes downward in a state where the rolling seal member 15 is bent in a U shape. Foreign matter can be prevented from accumulating inside the rolling seal member 15, and there is no problem in operation of the rolling seal member 15 due to foreign matter such as dust.

  4 and 5 show a second embodiment of the three-dimensional seismic isolation device according to the present invention. This three-dimensional seismic isolation device 1 uses a commercially available accumulator as the external fluid chamber 8, and this The external fluid chamber 8 is disposed outside the casing 30, the incompressible fluid chamber 13 of the external fluid chamber 8 and the internal fluid chamber 7 are connected by a pipe 9, and the internal fluid chamber 7 and the external fluid chamber 8 are connected. The incompressible fluid chamber 13 is filled with an incompressible fluid 11 such as oil, and the compressible fluid chamber 14 of the external fluid chamber 8 is configured to function as an air spring. This is the same as that shown in the first embodiment.

  Even in the three-dimensional seismic isolation device 1 according to the present embodiment, the rolling seal member 15 is connected to the seal portion 16 made of a material having airtightness and a predetermined value in the same manner as the one shown in the first embodiment. The reinforcing portion 17 made of a material that supports the pressure of the material is superposed in a non-bonded state so that the pressure from the internal fluid chamber 7 and the external fluid chamber 8 is received by the reinforcing portion 17. It only needs to be airtight. Accordingly, since the seal portion 16 can be thinned, the radius of curvature of the bent portion 18 of the rolling seal member 15 can be set small, and the inner cylinder 4 and the outer cylinder 5 that interpose the rolling seal member 15 can be set. Since the gap between them can be reduced and the tension of the seal portion 16 of the rolling seal member 15 can be kept low, it is possible to increase the pressure. Moreover, the vertical seismic isolation device 2 can be reduced in size in a plane.

  In addition, the external fluid chamber 8 is disposed outside the casing 30, the incompressible fluid chamber 13 of the external fluid chamber 8 is connected to the internal fluid chamber 7 via the pipe 9, and the compressive fluid chamber of the external fluid chamber 8 is connected. 14 functions as an air spring, so that the volume of the internal fluid chamber 7 can be significantly reduced as compared with the vertical seismic isolation device configured by only one fluid chamber. The size can be reduced in the height direction.

  Further, since a plurality of vertical seismic isolation devices 2 are arranged in parallel, even if any of the vertical seismic isolation devices 2 becomes unsupportable for some reason, Since the load from the seismic isolation object 35 can be continuously supported, safety can be ensured.

  Further, since the rolling seal member 15 is bent in a U-shape and the bent portion 18 protrudes downward, the rolling seal member 15 is interposed in the gap between the inner cylinder 4 and the outer cylinder 6, so that dust Such foreign matter does not accumulate inside the rolling seal member 15, and malfunctions of the rolling seal member 15 can be prevented.

  Furthermore, in this embodiment, since an incompressible fluid such as oil is applied to the seal portion 16 of the rolling seal member 15, the seal portion of the rolling seal member 15 is compared with the case where a gas such as air is used. It is possible to greatly reduce the fluid leakage from 16.

In each of the above embodiments, the horizontal seismic isolation device 20 is provided at the upper part of the vertical seismic isolation device 2, but the horizontal seismic isolation device 20 may be provided at the lower part of the vertical seismic isolation device 3. Good.
Moreover, you may make the structure of the vertical seismic isolation apparatus 2 upside down from what is shown in FIG. 1, FIG.

It is a schematic longitudinal cross-sectional view which shows the whole 1st Embodiment of the three-dimensional seismic isolation apparatus by this invention. It is a cross-sectional view of FIG. It is the elements on larger scale of FIG. It is a schematic longitudinal cross-sectional view which shows the whole 2nd Embodiment of the three-dimensional seismic isolation apparatus by this invention. It is a cross-sectional view of FIG. It is the schematic longitudinal cross-sectional view which showed an example of the conventional three-dimensional seismic isolation apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 3D seismic isolation device 2 Vertical seismic isolation device 3 Lower board 4 Inner cylinder 5 Upper board 6 Outer cylinder 7 Internal fluid chamber 8 External fluid chamber 9 Piping 10 Gas, such as air 11 Incompressible fluid, such as oil 13 Incompressibility Fluid chamber 14 Compressible fluid chamber 15 Rolling seal member 16 Seal portion 17 Reinforcement portion 18 Bending portion 20 Horizontal seismic isolation device 21 Laminated rubber 22 Lower flange 23 Upper flange 25 Base 30 Casing 31 Bottom plate 32 Side wall 33 Flange 34 Moving plate 35 Seismic isolation Object

Claims (11)

A three-dimensional seismic isolation device comprising a vertical seismic isolation device and a horizontal seismic isolation device between the foundation and the seismic isolation object,
The vertical seismic isolation device is U-shaped between the inner cylinder and the outer cylinder, and an inner cylinder and an outer cylinder that are relatively displaced following the relative displacement in the vertical direction between the foundation and the seismic isolation object. Reinforced with a seal part made of an airtight material that deforms following the relative displacement of both cylinders and a material that supports a predetermined pressure. A three-dimensional seismic isolation device characterized by comprising a rolling seal member that overlaps the portion in a non-adhered state.   The three-dimensional seismic isolation device according to claim 1, wherein a plurality of the vertical seismic isolation devices are arranged in parallel.   The three-dimensional seismic isolation device according to claim 2, wherein the plurality of vertical seismic isolation devices are housed in a common casing.   The three-dimensional seismic isolation device according to claim 2 or 3, wherein the vertical seismic isolation device and the horizontal seismic isolation device are interposed in series between the foundation and the seismic isolation object.   Providing at least one external fluid chamber outside the internal fluid chamber composed of the inner cylinder, the outer cylinder and the rolling seal member of the vertical seismic isolation device, and connecting the external fluid chamber to the internal fluid chamber via a pipe; The three-dimensional seismic isolation device according to any one of claims 1 to 4, wherein   The said rolling seal member is provided between the said inner cylinder and the said outer cylinder so that a bending part may protrude below in the state bent in the U shape. The three-dimensional seismic isolation device according to any one of 1 to 5.   The three-dimensional seismic isolation device according to any one of claims 1 to 6, wherein a compressive fluid is accommodated in the entire outer fluid chamber and the inner fluid chamber.   The external fluid chamber is constituted by an accumulator having an incompressible fluid chamber and a compressible fluid chamber, the incompressible fluid chamber of the accumulator and the internal fluid chamber are connected via a pipe, and The three-dimensional seismic isolation device according to any one of claims 1 to 6, wherein the incompressible fluid chamber and the internal fluid chamber of the accumulator are filled with an incompressible fluid, respectively. It is a seismic isolation method that segregates seismic isolation objects supported by the foundation by absorbing vibrations caused by earthquakes etc. input to the foundation,
The three-dimensional seismic isolation device according to claim 1 is interposed between the foundation and the seismic isolation object, and the vertical vibration from the foundation is absorbed by the vertical seismic isolation device, and the horizontal from the foundation A seismic isolation method characterized by absorbing directional vibrations by a horizontal seismic isolation device. Between the one member and the other member that are provided so as to be capable of relative displacement, they are interposed in a U-shaped bent state to form a sealed internal fluid chamber in the inner part of both members, and both members A rolling seal member that deforms following the relative displacement of
A seal portion formed from an airtight material provided facing the internal fluid chamber, and a reinforcement portion formed from a material supporting a predetermined pressure, provided in a non-adhesive state outside the seal portion. A rolling seal member comprising: A sealing method for sealing between two members so as to form a sealed internal fluid chamber in an inner portion of two members provided to be relatively displaceable,
Between the two members, a seal portion formed from a material having airtightness facing the internal fluid chamber is provided, and formed from a material that supports a predetermined pressure in an unbonded state outside the seal portion. The sealing method characterized by providing the reinforcement part.

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