JP2014196816A - Base isolation device, handling method for base isolation member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation device and the like in which a base isolation member such as a laminated rubber and the like can be replaced easily, and which does not require a jack to be arranged in the periphery for replacement and the like.SOLUTION: A connection member 3 of a base isolation device 1 has a cavity part 15 in a planar position corresponding to laminated rubbers 5a and 5b of an upper stage and a lower stage. In the cavity part 15, an expansion/contraction part 19 which expands and contracts vertically is installed. On an upper surface of the connection member 3, a thin plate 13 is provided. When the laminated rubber 5a of the upper stage of the base isolation device 1 is replaced, after the connection of the laminated rubber 5a, the thin plate 13 and the connection member 3, and the fixation of the laminated rubber 5a to a structure body 2 at an upper part are released in advance, the thin plate 13 is removed by expanding the expansion/contraction part 19. Next, the expansion/contraction part 19 is made to contract, the laminated rubber 5a is taken out and removed in a state where a space 44 is generated at an upper part of the laminated rubber 5a, and a new laminated rubber 5a is installed. Subsequently, the expansion/contraction part 19 is made to expand, the thin plate 13 is arranged, and then, the expansion/contraction part 19 is made to contract, and the connection of the laminated rubber 5a, the thin plate 13 and the connection member 3 and the fixation of the laminated rubber 5a to the structure body 2 at the upper part are performed.

Description

  The present invention relates to a seismic isolation device in which seismic isolation members are arranged in multiple stages, and a method of handling the seismic isolation member in the seismic isolation device.

  Conventionally, as a seismic isolation device in a heavy structure such as a nuclear facility, a multistage laminated rubber in which a plurality of laminated rubbers arranged at each stage are connected up and down by a connecting member and stacked in multiple stages has been widely used (for example, patents) Reference 1 and Patent Reference 2). As the connecting member, a single steel plate having a sufficient size capable of arranging a plurality of laminated rubbers is often used.

  In such a seismic isolation device, it is necessary to replace the laminated rubber as appropriate in order to ensure the required seismic isolation performance. Normally, when replacing the laminated rubber, a jack is placed around the seismic isolation device, the vertical load is borne by this jack, and the laminated rubber is taken out and removed in a state where the axial load of the laminated rubber is zero. Exchange.

JP 62-41874 A JP 2011-122602 A

  In general, laminated rubber is arranged at multiple points in the structure, and since the laminated rubber is replaced at some points, the superstructure load itself is basically replaced. Can be supported through no laminated rubber. Nevertheless, the reason why the jack is placed around the seismic isolation device as described above and the vertical load is borne is that if the laminated rubber has a bearing axial force, it becomes an obstacle such as taking out the laminated rubber. is there.

  However, when using a jack when replacing laminated rubber in the seismic isolation device, it is necessary to secure a space for placing the jack around the seismic isolation device. There was a problem that there was.

  The present invention has been made in view of the above-described problems, and an object thereof is to make it possible to easily replace a seismic isolation member such as a laminated rubber and to eliminate the need for a jack around the replacement. To provide seismic devices.

  A first invention for achieving the above-described object is a seismic isolation device in which an upper seismic isolation member and a lower seismic isolation member are coupled using a coupling member, the coupling member having a predetermined seismic isolation A space is provided between the connecting member and the predetermined seismic isolation member. The space holding member has a hollow portion at a planar position corresponding to the member, and an expansion / contraction portion extending in the vertical direction is disposed in the hollow portion. This is a seismic isolation device characterized in that

  According to the first invention, the expansion / contraction part is extended to push up (or push down) the seismic isolation member such as laminated rubber to be replaced, and a gap is provided between the spacing member and the seismic isolation member (or connecting member). After that, by removing the spacing member and then contracting the expansion / contraction part, a gap corresponding to the thickness of the spacing member is formed above the seismic isolation member, and the burden axial force of the seismic isolation member is set to zero. Therefore, seismic isolation members can be easily replaced. Moreover, since the burden axial force of a seismic isolation member is set to 0 like the past, it is not necessary to arrange | position a jack around a seismic isolation device, and it can work in space-saving.

The expansion / contraction part is a box body configured by a main body part and a lid part slidable in the vertical direction with respect to the main body part, and the connection member extends from the outside of the connection member to the inside of the box body. It is desirable to further have a communication pipe that communicates.
Thereby, while being able to simply comprise as a box which has a mechanism which slides an expansion-contraction part to an up-and-down direction, fluid can be supplied to the inside of a box from a communicating pipe, and an expansion-contraction part can be easily extended-contracted using this. . This fluid is, for example, water, gas or the like, and the expansion / contraction part can be easily expanded / contracted by freezing / thawing water inside the box or adjusting the gas supply amount.

  According to a second aspect of the present invention, an upper seismic isolation member and a lower seismic isolation member are coupled using a coupling member, and the coupling member has a hollow portion at a planar position corresponding to a predetermined seismic isolation member, In the method of handling the seismic isolation member in the seismic isolation device, in which the expansion and contraction part that expands and contracts in the vertical direction is disposed in the hollow part, and the removable spacing member is disposed between the connection member and the predetermined seismic isolation member A step (a) of extending the expansion / contraction part and removing the spacing member; and contracting the expansion / contraction part, and in a state where a gap is formed above the predetermined seismic isolation member, And a step (b) for removing the seismic isolation member, and a method for handling the seismic isolation member.

Moreover, the handling method of the seismic isolation member of 2nd invention WHEREIN: The process (c) which arrange | positions a new seismic isolation member in the location which removed the said predetermined seismic isolation member, expands the said expansion-contraction part, the said new It is preferable that the method further includes a step (d) of disposing a spacing member in a gap between the seismic isolation member and the connecting member, and a step (e) of contracting the stretchable portion.
Moreover, the said expansion-contraction part is a box comprised by the main-body part and the cover part which can be slid to an up-down direction with respect to the said main-body part, The said connection member of the said box from the exterior of the said connection member It is desirable to further have a communication pipe communicating with the inside, and to expand and contract the expansion / contraction part using a fluid supplied to the inside of the box through the communication pipe.
Furthermore, it is preferable that the fluid is water and the expansion / contraction part is expanded / contracted by freezing and thawing of water supplied to the inside of the box.

  2nd invention is the handling method at the time of removal or replacement | exchange of the seismic isolation member in the seismic isolation apparatus of 1st invention.

  ADVANTAGE OF THE INVENTION According to this invention, the seismic isolation apparatus etc. which can replace | exchange easily the seismic isolation members, such as laminated rubber, and do not need to arrange | position a jack around for replacement | exchange etc. can be provided.

Vertical section of seismic isolation device 1 Horizontal section of seismic isolation device 1 The figure which shows the replacement | exchange method of the laminated rubber 5a of the seismic isolation apparatus 1 The figure which shows the replacement | exchange method of the laminated rubber 5a of the seismic isolation apparatus 1 Diagram showing seismic isolation device 31 Diagram showing seismic isolation device 50

  Hereinafter, embodiments of the seismic isolation device of the present invention will be described in detail based on the drawings. The seismic isolation device of the present invention is installed in a lower part of a heavy structure such as a nuclear facility and used for seismic isolation, but can also be used for other structures.

[First Embodiment]
First, a first embodiment of the present invention will be described.

  FIG. 1 is a vertical sectional view of the seismic isolation device 1 according to the first embodiment. 2 is a cross-sectional view in the horizontal direction of the seismic isolation device 1. FIG. 2A is a cross-sectional view taken along line AA in FIG. 1, and FIG. 2B is a cross-sectional view taken along line BB in FIG. FIG.

  As shown in FIG. 1, the seismic isolation device 1 includes laminated rubbers 5a and 5b (seismic isolation members), a connecting member 3, a thin plate 13, and the like, and the laminated rubbers 5a and 5b are connected up and down using the connecting member 3 and the like. It is a multi-tiered stack.

  The laminated rubber 5a is arranged on the upper stage, and the laminated rubber 5b is arranged on the lower stage. In the seismic isolation device 1, the upper laminated rubber 5 a and the lower laminated rubber 5 b are provided so that their planar positions correspond to each other. As the laminated rubbers 5a and 5b, conventional rubber having a seismic isolation function can be used as appropriate.

  Each of the laminated rubbers 5a and 5b has an upper flange 11 at the upper end of the main body 7 and a lower flange 9 at the lower end. The upper flange 11 of the upper laminated rubber 5a and the upper flange 11 of the lower laminated rubber 5b are provided with bolt holes (not shown) used for connection with the connecting member 3 and the like at predetermined positions. The upper flange 11 of the upper laminated rubber 5a and the lower flange 9 of the lower laminated rubber 5b are directly joined and fixed to the upper structure 2 and the lower structure 4 with bolts or the like (not shown), respectively. The

  The connecting member 3 is disposed between the upper laminated rubber 5a and the lower laminated rubber 5b. As shown in FIG. 2A, the connecting member 3 is provided with a bolt hole 27. The bolt holes 27 are used for connection to the lower flange 9 of the upper laminated rubber 5a, the upper flange 11 of the lower laminated rubber 5b, and the like. In FIG. 2A, the planar positions of the lower flange 9 of the upper laminated rubber 5a and the upper flange 11 of the lower laminated rubber 5b are indicated by dotted lines.

  The connecting member 3 is provided with a cavity 15 at a planar position corresponding to the upper and lower laminated rubbers 5a and 5b. In the cavity 15, an expansion / contraction part 19 that expands and contracts in the vertical direction is arranged. The connecting member 3 is further provided with a communication pipe 17 that communicates the outside of the connecting member 3 and the inside 21 of the telescopic portion 19.

  As shown in FIG. 1 etc., in the seismic isolation device 1, the thin plate 13 (space | interval holding material) is arrange | positioned between the lower flange 9 of the upper laminated rubber 5a on the upper surface of the connection member 3. As shown in FIG. In the present embodiment, the upper laminated rubber 5a is exchanged, which will be described later.

  As shown in FIG. 2B, the thin plate 13 is, for example, an annular steel plate divided into a plurality in the circumferential direction. Bolt holes 29 are provided in the thin plate 13. The bolt holes 29 are used for connection to the connecting member 3 and the lower flange 9 of the upper laminated rubber 5a.

  In the seismic isolation device 1 shown in FIG. 1, the bolt hole of the lower flange 9 of the upper laminated rubber 5a, the bolt hole 29 of the thin plate 13, and the bolt hole 27 of the connecting member 3 communicate with each other. Each member is connected by screwing a bolt. The bolt holes of the upper flange 11 of the lower laminated rubber 5b described above communicate with the bolt holes 27 of the connecting member 3, and bolts are screwed into these holes from below to connect the members. In addition, illustration of these bolts was abbreviate | omitted in each figure.

  As shown in FIG. 1 and the like, the expansion / contraction part 19 is a box body in which a main body part 23 composed of a bottom surface 24 and side surfaces 22 and an upper lid part 25 composed of an upper surface 26 and side surfaces 28 are combined. The communication pipe 17 passes through the side surface 22 of the main body 23 and reaches the inside 21 of the box.

In the telescopic part 19, the side surface 28 of the upper lid part 25 is arranged so as to fit along the inner side of the side surface 22 of the main body part 23, and the upper lid part 25 slides in the vertical direction along the side surface 22 of the main body part 23. It is possible to move.
The stretchable part 19 is placed on the upper flange 11 of the lower laminated rubber 5b. However, the main body 23 of the expansion / contraction part 19 may be fixed to the connecting member 3, or a bottom plate may be provided in the hollow portion 15 and disposed on the bottom plate.

  In order to expand and contract the expansion / contraction part 19, a fluid is supplied from the outside of the connecting member 3 to the inside 21 of the expansion / contraction part 19 via the communication pipe 17, and the upper lid part 25 is moved vertically with respect to the main body part 23 using this fluid. To slide. Details of this will be described later.

  Next, a method for replacing the laminated rubber in the seismic isolation device 1 will be described with reference to FIGS. In the present embodiment, the upper laminated rubber 5a is replaced.

  When the upper laminated rubber 5a of the seismic isolation device 1 is replaced, the bolts that have previously connected the lower flange 9, the thin plate 13, and the connecting member 3 to the laminated rubber 5a are removed, and the connection of these members is released. Moreover, although the upper flange 11 of the laminated rubber 5a is fixed to the upper structure 2, this fixing is also released. Note that the lower flange 9 and the thin plate 13 of the laminated rubber 5a may remain connected.

  When replacing the laminated rubber 5a, first, as shown in FIG. 3A, water 41 is supplied as a fluid to the inside 21 (see FIG. 1) of the extendable portion 19 via the communication pipe 17. If the inside 21 (and the communication pipe 17) of the expansion / contraction part 19 is filled with water 41, the communication pipe 17 is closed and sealed to the outside.

  Next, the water 41 is frozen. Then, as shown in FIG. 3B, as the volume of the water 41 is increased due to the freezing of the water 41, the upper lid portion 25 slides upward with respect to the main body portion 23, and the stretchable portion 19 extends upward. Along with this, while the main body 7 of the laminated rubber 5 a is slightly contracted, the lower flange 9 is pushed up from the expansion / contraction part 19, and there is a gap between the thin plate 13 disposed on the upper surface of the connecting member 3 and the lower flange 9 above it. 43 is formed (the load axial force of the thin plate 13 becomes zero).

Next, as shown in FIG. 3C, the thin plate 13 is removed from the upper surface of the connecting member 3. Thereby, the gap 43 is expanded by the thickness of the thin plate 13.
When the lower flange 9 of the laminated rubber 5a and the thin plate 13 are connected as described above, the gap 43 is formed below the thin plate 13, but at this stage, the connection is released and the thin plate 13 is removed. Remove it.

  Thereafter, when the water 41 is melted and returned to a liquid state, as shown in FIG. 3D, the volume of the water 41 is reduced and the upper lid portion 25 slides downward and the expansion / contraction portion 19 contracts. . As the stretchable portion 19 contracts, the laminated rubber 5 a descends while the main body 7 slightly extends, and the lower flange 9 contacts the upper surface of the connecting member 3. Thereafter, the laminated rubber 5a is taken out to the side as shown by the arrows in the figure and removed.

  At this time, a gap 44 corresponding to the thickness of the thin plate 13 is formed above the laminated rubber 5a, and the laminated rubber 5a is in a non-contact state with the upper structural body 2. Therefore, the load axial force of the laminated rubber 5a is 0. Therefore, the laminated rubber 5a can be easily taken out.

For example, when the seismic isolation device 1 itself is removed, the laminated rubber 5a is removed by the above procedure, and then the connecting member 3 and the lower laminated rubber 5b are removed sequentially.
On the other hand, when exchanging the laminated rubber 5a, a new laminated rubber 5a is disposed at a location where the laminated rubber 5a is removed by the above procedure, and the above procedure is executed in reverse.

  That is, as shown by the arrow in FIG. 4A, after placing a new laminated rubber 5a from the side and temporarily placing it, the water 41 is frozen as shown in FIG. Thus, the expansion / contraction part 19 is extended. Then, the laminated rubber 5a is pushed up by the stretchable part 19 so that the upper flange 11 comes into contact with the upper structure 2 and the main body 7 is slightly shrunk to form a gap 43 between the lower flange 9 and the connecting member 3. 4C, the thin plate 13 is disposed on the upper surface of the connecting member 3 in the gap 43. As shown in FIG. And the water 41 is melted and the expansion-contraction part 19 is contracted.

  Accordingly, as shown in FIG. 4D, the main body 7 of the laminated rubber 5a slightly extends and the lower flange 9 comes into contact with the thin plate 13, so that finally, the lower flange 9, the thin plate 13, the connection of the laminated rubber 5a. The members 3 are connected and integrated with bolts, and the upper flange 11 of the laminated rubber 5a is joined and fixed to the upper structure 2 to complete the exchange of the laminated rubber 5a.

  In addition, the water 41 is discharged | emitted from the expansion-contraction part 19 to the exterior of the connection member 3 via the communication pipe 17 as needed. The freezing and thawing of the water 41 can be performed, for example, by providing a known heating / cooling mechanism in the cavity 15 or the expansion / contraction part 19 and remotely operating it. Alternatively, the water 41 may be frozen or thawed by heating or cooling from the outside of the connecting member 3.

  Thus, in the seismic isolation device 1 of the first embodiment, the expansion / contraction part 19 is disposed in the cavity 15 of the connection member 3, and the thin plate 13 is disposed on the upper surface of the connection member 3. When the laminated rubber 5a is exchanged by performing the exchange of the upper laminated rubber 5a and the like while performing the expansion / contraction of the elastic part 19 and the removal / attachment of the thin plate 13 which is the spacing member as described above. In addition, a gap 44 is formed between the laminated rubber 5a and the upper structure 2, and the load axial force of the laminated rubber 5a can be reduced to 0, which facilitates replacement. Moreover, since it is not necessary to arrange a jack around the seismic isolation device 1 as in the prior art, it is possible to easily replace the laminated rubber 5a even in a narrow space.

Moreover, in 1st Embodiment, the expansion-contraction part 19 is made into the box comprised by the main-body part 23 and the upper cover part 25, and the volume change by freezing and thaw | melting the water 41 supplied to the inside 21 of this box is carried out. Since the expansion / contraction part 19 is expanded and contracted, the expansion / contraction part 19 has a simple configuration and can be easily expanded and contracted.
However, the structure of the expansion / contraction part 19 is not limited to this as long as the expansion / contraction part 19 can be vertically expanded and contracted, and the expansion / contraction method is not limited to freezing and thawing the water 41. For example, the fluid supplied to the expansion / contraction part 19 may be a liquid or gas other than water, and the expansion / contraction part 19 may be expanded or contracted by changing the supply amount.

  Moreover, in 1st Embodiment, although the thin plate 13 which divided | segmented the cyclic | annular steel plate into the circumferential direction was used as a space | interval holding material between the connection member 3 and the lower flange 9 of the laminated rubber 5a, the material of a space | interval holding material is used. The shape of the laminated rubber 5a is not limited to this, and the gap between the connecting member 3 and the lower flange 9 of the laminated rubber 5a can be maintained at a predetermined value, so that the laminated rubber 5a can be replaced by the above procedure, and can be easily removed and attached. Anything can be used.

  Further, in the first embodiment, an example in which the upper laminated rubber 5a is exchanged has been shown. However, the present invention is not limited to this, and the lower laminated rubber 5b may be exchanged in the same manner. It is also possible to exchange the upper and lower laminated rubbers 5a and 5b at once. These examples will be described below as second and third embodiments. In the second and third embodiments, differences from the first embodiment will be mainly described, and the same points as those in the first embodiment will be denoted by the same reference numerals in the drawings and the description thereof will be omitted. .

[Second Embodiment]
FIG. 5 is a diagram illustrating the seismic isolation device 31 according to the second embodiment of the present invention and the replacement of the lower laminated rubber 5 b in the seismic isolation device 31.

FIG. 5A is a vertical sectional view of the seismic isolation device 31.
As shown in the figure, the seismic isolation device 31 is a seismic isolation device 1 according to the first embodiment in that a thin plate 13 is disposed on the lower surface of the connecting member 3 with the upper flange 11 of the lower laminated rubber 5b. And different. In the present embodiment, the lower laminated rubber 5b is replaced, which will be described later.

An expansion / contraction part 33 is provided in the cavity 15 of the connecting member 3.
The stretchable portion 33 is a box that combines a lower lid portion 35 composed of a bottom surface 34 and a side surface 32, and a main body portion 37 composed of an upper surface 36 and a side surface 38. The lower lid portion 35 is disposed so that the side surface 32 is fitted along the outer side of the side surface 38 of the main body portion 37, and is slidable in the vertical direction along the side surface 38 of the main body portion 37. The communication pipe 17 of the connecting member 3 passes through the side surface 38 of the main body portion 37 and reaches the inside 39 of the extendable portion 33. As in the first embodiment, the main body portion 37 of the extendable portion 33 may be fixed to the connecting member 3.

  In the seismic isolation device 31, when the lower laminated rubber 5b is replaced, first, the upper flange 11, the thin plate 13 and the connecting member 3 are released from the laminated rubber 5b and the lower portion of the lower flange 9 of the laminated rubber 5b. Is fixed to the structure 4, and water 41 is supplied to the inside 39 of the stretchable part 33 through the communication pipe 17. When the inside 39 (and the communication pipe 17) of the expansion / contraction part 33 is filled with water 41, the communication pipe 17 is closed and sealed to the outside.

  Thereafter, when the water 41 is frozen, as shown in FIG. 5 (b), the lower lid 35 slides downward with respect to the main body 37 due to the increase in volume of the water 41, and the expansion / contraction part 33 extends downward. To do. Along with this, while the main body 7 of the laminated rubber 5b is slightly contracted, the upper flange 11 is pushed down from the expansion / contraction part 33, and the thin plate placed on the upper surface of the upper flange 11 (by releasing the connection with the connecting member 3). A gap 45 is formed between 13 and the connecting member 3.

  Subsequently, when the thin plate 13 is removed and the water 41 is melted and returned to a liquid state, as shown in FIG. 5 (c), the lower lid 35 slides upward and contracts as the volume of the water 41 decreases. 33 contracts. Although the main body 7 of the laminated rubber 5b slightly expands as the expansion / contraction part 33 contracts, a gap 46 corresponding to the thickness of the thin plate 13 remains above the laminated rubber 5b, and the load axial force of the laminated rubber 5b becomes zero. Therefore, in this state, the laminated rubber 5b is taken out to the side and removed.

Similarly to the first embodiment, when removing the seismic isolation device 31 itself, after removing each laminated rubber 5b in the above procedure, the removal of the connecting member 3 and the removal of each upper laminated rubber 5a are sequentially performed. Just do it.
On the other hand, when replacing the laminated rubber 5b, a new laminated rubber 5b is disposed at a location where the laminated rubber 5b is removed, the water 41 is frozen, and the expansion / contraction part 33 is extended again.

  Then, while the main body 7 of the laminated rubber 5b is slightly contracted, the upper flange 11 is pushed down from the expansion / contraction part 33, and the gap 46 between the connection member 3 is expanded, so that again as shown in FIG. A thin plate 13 is disposed on the upper surface of the upper flange 11 of the laminated rubber 5b.

  Subsequently, when the water 41 is melted and the expansion / contraction part 33 is contracted, the main body 7 of the laminated rubber 5b slightly extends and the upper flange 11 rises, and the thin plate 13 on the upper surface contacts the lower surface of the connecting member 3. The upper flange 11, thin plate 13 and connecting member 3 of the laminated rubber 5b are connected and integrated with bolts, and the lower flange 9 of the laminated rubber 5b is fixed to the lower structure 4 to complete the replacement of the laminated rubber 5b. To do.

  As described above, also in the seismic isolation device 31 of the second embodiment, the expansion and contraction of the expansion / contraction part 33 and the removal and attachment of the thin plate 13 are performed as described above, while the lower laminated rubber 5b is replaced. The same effect as that of the first embodiment can be obtained, in which the load axial force of the laminated rubber 5b is set to 0 without using a jack around the seismic isolation device 31, and the replacement or the like can be performed easily and in a space-saving manner.

[Third Embodiment]
FIG. 6 is a diagram illustrating the seismic isolation device 50 according to the third embodiment of the present invention and the replacement of the upper and lower laminated rubbers 5 a and 5 b in the seismic isolation device 50.

FIG. 6A is a vertical sectional view of the seismic isolation device 50.
As shown in the figure, the seismic isolation device 50 includes a thin plate 13a disposed on the upper surface of the connecting member 3 between the lower flange 9 of the upper laminated rubber 5a, and a lower plate on the lower surface of the connecting member 3. It differs from 1st Embodiment by the point by which the thin plate 13b is arrange | positioned between the upper flanges 11 of the laminated rubber 5b. In this embodiment, the upper and lower laminated rubbers 5a and 5b are exchanged at once, which will be described later.

An expansion / contraction part 51 is provided in the cavity 15 of the connecting member 3.
The stretchable portion 51 is a box that combines a lower lid portion 52 having a bottom surface 54 and a side surface 53, a main body portion 55 having a cylindrical side surface 56, and an upper lid portion 57 having an upper surface 58 and a side surface 59. is there. The lower lid portion 52 and the upper lid portion 57 are arranged such that the side surfaces 53 and 59 are fitted along the outside of the side surface 56 of the main body portion 55, and are slidable in the vertical direction along the side surface 56 of the main body portion 55. is there. The communication pipe 17 of the connecting member 3 passes through the side surface 56 of the main body portion 55 and reaches the inside 60 of the extendable portion 51. In the present embodiment, the main body portion 55 is fixed to the connecting member 3 by fixing means (not shown).

  When the upper and lower laminated rubbers 5a and 5b are replaced in the seismic isolation device 50, first, the lower flange 9 and the thin plate 13a are connected to the connecting member 3 and the upper laminated rubber 5b is connected to the upper laminated rubber 5a. The connection between the flange 11, the thin plate 13b, and the connecting member 3 is released, and the upper flange 11 of the laminated rubber 5a is fixed to the upper structure 2, and the lower flange 9 of the laminated rubber 5b is fixed to the lower structure 4. Is released, and water 41 is supplied to the interior 60 of the expansion / contraction part 51 through the communication pipe 17. If the inside 60 (and the communication pipe 17) of the expansion / contraction part 51 is filled with water 41, the communication pipe 17 is closed and sealed to the outside.

  Thereafter, when the water 41 is frozen, as shown in FIG. 6B, the volume of the water 41 increases and the upper lid portion 57 slides upward and the lower lid portion 52 slides downward with respect to the main body portion 55. The expansion / contraction part 51 extends up and down. Accordingly, in the upper laminated rubber 5a, a gap 48a is formed between the lower flange 9 and the thin plate 13a on the upper surface of the connecting member 3 as in the first embodiment. In the lower laminated rubber 5b, a gap 48b is formed between the thin plate 13b placed on the upper surface of the upper flange 11 and the connecting member 3, as in the second embodiment.

  Subsequently, when the thin plates 13a and 13b are removed and the water 41 is melted and returned to the liquid state, as shown in FIG. 6C, the upper lid portion 57 is moved downward and the lower lid portion as the volume of the water 41 decreases. 52 slides upward and the expansion / contraction part 51 contracts. Accordingly, in the upper laminated rubber 5a, a gap 49a corresponding to the thickness of the thin plate 13a is generated between the laminated rubber 5a and the upper structure 2 as in the first embodiment. In the lower laminated rubber 5b, a gap 49b corresponding to the thickness of the thin plate 13b is generated between the laminated rubber 5b and the upper connecting member 3 as in the second embodiment. Thereby, since the burden axial force of laminated rubber 5a, 5b is set to 0, laminated rubber 5a, 5b is taken out and removed in this state.

  When the seismic isolation device 50 itself is removed, the laminated rubbers 5a and 5b may be removed by the above procedure. On the other hand, when the laminated rubbers 5a and 5b are replaced, new laminated rubbers 5a and 5b are arranged in place of the removed laminated rubbers 5a and 5b, the water 41 is frozen, and the expansion / contraction part 51 is extended as described above. Then, as shown in FIG. 6B, the thin plate 13a is disposed on the upper surface of the connecting member 3 and the thin plate 13b is disposed on the upper surface of the upper flange 11 of the laminated rubber 5b.

  Subsequently, when the water 41 is melted and the expansion / contraction part 51 is contracted, as for the laminated rubber 5a, the lower flange 9 comes into contact with the thin plate 13a on the upper surface of the connecting member 3 as in the first embodiment. As for the laminated rubber 5b, the thin plate 13b on the upper surface of the upper flange 11 is in contact with the lower surface of the connecting member 3 as in the second embodiment. Finally, the lower flange 9 of the laminated rubber 5a, the thin plate 13a and the connecting member 3 and the upper flange 11, the thin plate 13b and the connecting member 3 of the laminated rubber 5b are connected using bolts, and the laminated rubber 5a. The upper flange 11 is fixed to the upper structure 2 and the lower flange 9 of the laminated rubber 5b is fixed to the lower structure 4, and the exchange of the laminated rubber 5a and 5b is completed.

  Thus, also in the seismic isolation device 50 of the third embodiment, the expansion and contraction of the expansion and contraction part 51 and the removal and attachment of the thin plates 13a and 13b are performed as described above, while the upper and lower laminated rubbers 5a and 5b With the first embodiment, by performing replacement etc., the load axial force of the laminated rubber 5a, 5b can be set to 0 without using a jack around the seismic isolation device 50, and the replacement can be performed easily and in a space-saving manner. Similar effects can be obtained. Furthermore, in the third embodiment, since the upper and lower two laminated rubbers 5a and 5b can be exchanged at once, there is an advantage that the work is made efficient.

In the above embodiment, the upper and lower two-tiered laminated rubbers 5a and 5b are connected via the connecting member 3, but the number of connecting steps of the laminated rubber is not limited to this. The number and arrangement of laminated rubbers in the same stage can be variously determined.
For example, the planar positions of the upper laminated rubber 5a and the lower laminated rubber 5b do not necessarily correspond. Even in the case where the planar position does not correspond, if the cavity is provided in the planar position corresponding to the laminated rubber 5a or laminated rubber 5b to be replaced in the connecting member 3 and the expansion / contraction part is disposed, the same procedure as described above is performed. The laminated rubber 5a and the laminated rubber 5b can be exchanged.

  In addition, in the above-described embodiment, the laminated rubber is used as a seismic isolation member, and the seismic isolation device arranged in multiple stages has been described. However, other seismic isolation members having a seismic isolation function instead of the laminated rubber, for example, rolling It is also possible to use a bearing or the like.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs.

DESCRIPTION OF SYMBOLS 1, 31, 50 ... Seismic isolation device 3 ... Connection member 5a, 5b ... Laminated rubber 13, 13a, 13b ... Thin plate 15 ... Hollow part 17 ... Communication pipe 19, 33, 51 ... Expansion / contraction part 21, 39, 60 ... Inside 23 , 37, 55 ... main body 25, 57 ... upper lid 35, 52 ... lower lid 41 ... water 43, 44, 45, 46, 48a, 48b, 49a, 49b ... gap

Claims (6)

A seismic isolation device that connects an upper seismic isolation member and a lower seismic isolation member using a coupling member,
The connecting member has a hollow portion at a planar position corresponding to a predetermined seismic isolation member,
In the hollow portion, a stretchable portion that stretches in the vertical direction is disposed,
A seismic isolation device, wherein a removable spacing member is disposed between the connecting member and the predetermined seismic isolation member. The expansion / contraction part is a box composed of a main body part and a lid part slidable in the vertical direction with respect to the main body part,
The seismic isolation device according to claim 1, wherein the connecting member further includes a communication pipe that communicates from the outside of the connecting member to the inside of the box. The upper seismic isolation member and the lower seismic isolation member are connected using a connecting member,
The connecting member has a cavity at a planar position corresponding to a predetermined seismic isolation member;
In the hollow portion, a stretchable portion that stretches in the vertical direction is disposed,
A seismic isolation member handling method in a seismic isolation device in which a removable spacing member is disposed between the connecting member and the predetermined seismic isolation member,
Extending the stretchable part and removing the spacing member;
(B) removing the predetermined seismic isolation member in a state where the telescopic part is contracted and a gap is formed above the predetermined seismic isolation member;
A method for handling seismic isolation members, comprising: A step (c) of arranging a new seismic isolation member at a location where the predetermined seismic isolation member is removed;
Elongating the stretchable part, and placing a spacing member in the gap between the new seismic isolation member and the coupling member (d),
A step (e) of contracting the stretchable portion;
The seismic isolation member handling method according to claim 3, further comprising: The expansion / contraction part is a box composed of a main body part and a lid part slidable in the vertical direction with respect to the main body part,
The connection member further includes a communication pipe communicating from the outside of the connection member to the inside of the box.
The seismic isolation member handling method according to claim 3 or 4, wherein the telescopic portion is expanded and contracted using a fluid supplied into the box through the communication pipe. The fluid is water;
The method for handling seismic isolation members according to claim 5, wherein the telescopic portion is expanded and contracted by freezing and thawing of water supplied to the inside of the box.

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