JP2016023782A - Base isolation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce residual displacement as much as possible without greatly impairing base isolation performance to attain effective base isolation, and to integrate a constitution of a whole system in a compact manner.SOLUTION: A base isolation system for absorbing earthquake vibration of a base isolation object includes: a movable plate 21 supporting the base isolation object; a guide mechanism 32 for guiding the drawing direction of a wire 31 whose one end is connected to the movable plate 21 to another direction; an elastically deformable coil spring 33 connected to the wire 31 guided to the other direction by the guide mechanism 32; and a compression material 35 fixed to the ground, and connecting the fixation end of the coil spring 33 and the guide mechanism 32.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a seismic isolation system that absorbs seismic motion of a seismic isolation object.

  For example, as shown in Patent Document 1, a plurality of ball bearings are fixed to a frame so that the frame can be freely moved on the floor slab. A seismic isolation floor is proposed. In the disclosed technique of this patent document 1, the ball bearing is arranged especially in the lower part of the metal pipe, so that even if an earthquake load is applied, the rolling friction resistance of the ball bearing is small, so that the seismic isolation floor has almost no vibration. Is not transmitted.

  In addition, as shown in Patent Document 2, an upper plate and a lower plate provided with a plurality of grooves are installed between a floor material and precision equipment, and the upper plate is rotated by rotating the balls in the grooves. A seismic isolation floor that can move freely on the lower plate has been proposed. In the disclosed technique of Patent Document 2, even if an earthquake load is applied, the rolling frictional resistance of the ball in the groove is small, so that vibration is hardly transmitted to the precision instrument on the upper plate.

  Particularly in recent years, as shown in Patent Document 3, a flat planing plate having a lower surface formed substantially flat on a flat base formed by aligning a plurality of upward convex curved surface portions on the upper surface. A seismic isolation floor with a space has been proposed. According to such a base-isolated floor, when a large earthquake occurs, the sliding board can smoothly move on the base to exhibit the base-isolating performance.

  Further, Patent Document 4 discloses a sliding seismic isolation mechanism that slidably supports a seismic isolation object on a support part via a sliding surface, and further a restoring spring between the seismic isolation object and the support part. And a preload is applied thereto. As a result, the seismic isolation object can be rotated in the horizontal plane following the horizontal displacement, and not only the residual displacement but also the residual rotation angle can be reduced as compared with the state without the restoring spring. It becomes possible.

JP 10-317658 A JP 2010-127455 A JP 2013-91997 A JP2013-64418A

  However, in the technique disclosed in Patent Document 4 described above, a case with a built-in restoring spring is arranged around the seismic isolation object. At this time, as shown in FIG. 1 of the Patent Document 4, it is necessary to provide a considerable space for installing the case around the seismic isolation object. As a result, the system configuration of the seismic isolation mechanism as a whole becomes large, and there is a problem that it becomes a great obstacle in taking seismic isolation measures especially in a narrow space.

  Therefore, the present invention has been devised in view of the above-described problems, and an object thereof is to provide an elastic member (restoring spring) in a seismic isolation system that absorbs seismic motion of a seismic isolation object. This makes it possible to achieve effective seismic isolation by reducing the residual displacement as much as possible without significantly impairing the seismic isolation performance, and by consolidating the overall system configuration in a compact space. Is to provide a seismic isolation system that can take seismic isolation measures.

  The seismic isolation system according to claim 1 is a seismic isolation system that absorbs seismic motion of the seismic isolation object, wherein the movable part that supports the seismic isolation object and the extending direction of the wire connected at one end to the movable part It is fixed to a guide mechanism for guiding in another direction, an elastic member that is elastically deformable by being connected to a wire guided in the other direction by the guide mechanism, and a ground or a structure that behaves integrally therewith. And a compression member to which the fixed end of the elastic member and the guide mechanism are connected.

  The seismic isolation system according to claim 2 is the seismic isolation system according to claim 1, wherein the compression member has a compression force based on a reaction force of elastic deformation by the elastic member between the fixed end of the elastic member and the guide mechanism. It is characterized by being loaded.

  The seismic isolation system according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the wire is wound around the guide mechanism over one turn or more.

  The seismic isolation system according to claim 4 is the invention according to any one of claims 1 to 3, wherein the elastic member is preloaded with a preload.

  The seismic isolation system according to claim 5 is the invention according to any one of claims 1 to 4, wherein the elastic member is a constant load spring.

  A seismic isolation system according to a sixth aspect is the invention according to any one of the first to fifth aspects, wherein the compression material is mounted on a wall surface of a structure located around the movable portion or the movable portion. The elastic member is laid and fixed on a floor or a base to be placed so as to be elastically deformable in a substantially horizontal direction.

  The seismic isolation system according to claim 7 is the seismic isolation system according to claim 6, wherein the compression material is fixed on the floor and mounted on a base on which the movable part is placed. It is characterized by.

  The seismic isolation system according to claim 8 provides the seismic isolation system according to any one of claims 1 to 6, wherein a plurality of the compression members are provided in an opening formed substantially at the center of the movable portion, and each guide is provided. The plurality of wires that have been stretched toward the mechanism are guided to the compression material in a substantially single direction.

  The seismic isolation system according to claim 9 is the seismic isolation system according to any one of claims 1 to 6, wherein the movable portion includes a plurality of wires extending from different directions at substantially the center. It is characterized by being fixed.

  The seismic isolation system according to claim 10 is characterized in that, in the invention according to claim 9, the plurality of wires guided upward are connected to one elastic member.

  The seismic isolation system according to claim 11 is the invention according to any one of claims 1 to 6, wherein the movable portion is provided with openings at a plurality of locations, and one compression material is provided at each opening. The two wire rods that have been stretched toward each of the guide mechanisms are guided to the compression material in a substantially one direction, and further stretched toward the guide mechanism between the openings at the plurality of locations. It is characterized in that the extending directions of the wires are made different from each other.

  According to the present invention having the above-described configuration, effective seismic isolation can be realized by reducing residual displacement and the like as much as possible without greatly impairing the seismic isolation performance. It is possible to take seismic isolation measures even in a small space by gathering them compactly.

(A) is a sectional side view of the seismic isolation system to which this invention is applied, (b) is the top view. It is a figure for demonstrating the other example of a guide mechanism. It is a figure for demonstrating the example which guides a wire with respect to the pulley as a guide mechanism. It is a figure which shows the example which comprised with the rotary wheel which cannot be swung about a guide mechanism, and used the constant load spring as an elastic member. It is a figure for demonstrating the jig | tool for latching the upper end of a coil spring. It is a top view of the whole seismic isolation system to which this invention is applied. It is a figure which shows the relationship of the elongation with respect to the tensile load of a coil spring. It is a figure which shows the relationship of the elongation with respect to the tensile load of a constant load spring. (A) is a side view in the case of using a metal plate as a compression material, (b) is the top view. It is a figure for demonstrating the example which provides a through-hole in the approximate center of the continuous body of a movable plate, and provides a several seismic isolation system collectively. It is an expanded sectional side view of the structure of FIG. It is a figure for demonstrating the example which accommodates one coil spring in a compression material inside, and provides several guide mechanisms in the lower end of a compression material. It is another figure for demonstrating the example which accommodates one coiled spring inside a compression material, and provides several guide mechanisms in the lower end of a compression material. It is a figure for demonstrating the structure which is made to extend | stretch in a desired location, extending | stretching a wire from the each side of the continuous body of a movable plate, and guiding these through a pulley. It is a figure for demonstrating the example fixed to a floor rather than fixing a compression material to a wall. It is another figure for demonstrating the example fixed to a floor rather than fixing a compression material to a wall. It is a figure for demonstrating the example which fixes a compression material to a movable plate. It is another figure for demonstrating the example which fixes a compression material to a movable plate. It is a figure which shows the structure which seismically isolates by applying this invention about an actual seismic isolation object.

  Hereinafter, embodiments for implementing a seismic isolation system to which the present invention is applied will be described in detail with reference to the drawings.

  As shown in FIG. 1, the seismic isolation system 10 to which the present invention is applied is isolated when a large earthquake occurs on the seismic isolation object provided on the seismic isolation floor 7 installed on the upper surface 1 a of the floor 1. The performance is exhibited effectively. The seismic isolation system 10 includes a wire 31 connected to the seismic isolation floor 7, a guide mechanism 32 for guiding the extending direction of the wire 31 in another direction, and a wire guided in the other direction by the guide mechanism 32. A coil spring 33 connected to the coil spring, a rod-like body 34 for locking the coil spring 33, and a compression member 35 fixed to the wall body 36.

  The seismic isolation floor 7 includes a base 11 installed on a substantially flat surface, and a movable plate 21 installed on the base 11.

  In the base 11, a plurality of convex curved surface portions 12 are regularly arranged toward the movable plate 21 side. The base 11 is made of metal and is preferably made of stainless steel in particular, but is not limited thereto, and may be made of any material such as glass or resin. Incidentally, the base 11 may be coated with a film having predetermined physical properties in order to control the friction coefficient or to prevent corrosion. Further, the adjustment of the coefficient of friction of the surface of the base 11 may be performed by covering a hard material such as metal or ceramic on the surface layer of at least the convex curved surface portion 12, or by surface hardening such as carburizing treatment or boriding treatment. Of course, it may be realized by controlling the surface roughness by performing additional processing.

  The convex curved surface portion 12 is desirably configured to be substantially circular, but is not limited thereto. The convex curved surface portions 12 may be regularly aligned vertically and horizontally in a plan view, but is not limited thereto, and may be formed in a staggered manner. Moreover, the convex curved surface part 12 can also be formed irregularly, and the convex curved surface part 12 from which a magnitude | size differs can also be formed regularly. In addition, according to this invention, it is not essential that the convex curve part 12 is formed in the base 11, and you may make it abbreviate | omit these structures. Further, according to the present invention, the base 11 is not an essential component and may be omitted.

  On the movable plate 21, a seismic isolation object is placed. The movable plate 21 may be configured in any form as long as it supports the seismic isolation object. The movable plate 21 can freely move with respect to the base 11 placed when a large earthquake occurs. The movable plate 21 may be made of metal, glass, resin, or the like, or stainless steel may be used only for the surface layer. Incidentally, when the configuration of the base 11 is omitted, the movable plate 21 is directly placed on the floor 1. A wire 31 is provided on the movable plate 21. A connection member 41 for connecting one end of the wire 31 is provided on the surface of the movable plate 21. The connecting member 41 is formed with a through hole (not shown) through which the wire 31 can be inserted, and the other end of the wire 31 passing through the through hole (not shown) has a fixing member 42 having a diameter larger than that of the through hole. Is attached. For this reason, even when a tensile stress is applied to the wire 31, the movable plate 21 is moved in the tensile direction following the tensile stress via the fixing member 42 and the connecting member 41 in contact with the fixing member 42. Can be moved. In addition, the connection method of the wire 31 and the movable plate 21 is not limited to the method described above, and may be connected by any other method.

  The wire rod 31 is composed of any linear body such as a wire, a rope, and a string, and one end thereof is connected to the movable plate 21 as described above. The wire 31 is guided in its extending direction via a guide mechanism 32, and the other end is connected to a coil spring 33.

  The guide mechanism 32 is composed of a moving pulley or the like, for example, and is provided at the lower end of the compression material 35. The guide mechanism 32 plays a role of guiding the extending direction of the wire 31 in another direction. In the example of FIG. 1, the guide mechanism 32 guides the wire that has been stretched from the substantially horizontal direction along the wall body 36 in the substantially vertical direction, but is not limited to this. You may make it guide toward the direction (For example, the paper surface depth direction in FIG. 1).

  FIG. 2 shows another example of the guide mechanism 32. The guide mechanism 32 is a swing pulley that can swing and rotate in a plan view, and includes a pulley 321 and a rotating portion 322 to which the pulley 321 is attached. Incidentally, the pulley 321 is provided with a groove along the circumferential direction thereof, so that the wire 31 can be prevented from deviating from the pulley 321.

  By the guide mechanism 32 composed of such a swing pulley, even when the pulling direction from the wire rod 31 is fluctuated due to an earthquake due to various horizontal movements of the movable plate 21, the rotating unit 322 rotates following this. It becomes possible to do.

  Further, as shown in FIG. 3A, the guide mechanism 32 may guide the pulley 321 by simply abutting it against the pulley 321 without winding it, or FIG. ), The wire 31 may be wound around the pulley 321 one or more times. When the wire 31 is wound around the pulley 321 one or more times, the wire 31 can be more securely prevented from detaching from the pulley 321 and the tensile direction from the wire 31 varies due to an earthquake. In this case, it becomes possible to follow this firmly.

  In the example of FIG. 4, the guide mechanism 32 is configured by a rotating wheel 325 that cannot swing in a plan view. The central axis 326 of the rotating wheel 325 protrudes outward in the axial direction. The rotating wheel 325 is sandwiched between edge portions 327 provided upright at both ends in the axial direction. Further, the edge portion 327 is provided with a hole (not shown) through which the central shaft 326 is inserted. That is, the center shaft 326 is provided on the edge portion 327 through a hole portion (not shown). For this reason, the rotary wheel 325 is configured to be rotatable about the central axis provided at the edge 327 as a rotation axis. By guiding the wire 31 to the rotating wheel 325 as described above, when the tensile stress is applied to the wire 31, the rotating wheel 325 can be freely rotated. At this time, the wire rod 31 is movable on the rotating wheel 325 as indicated by a dotted line in FIG. Even when the wire 31 is pulled in various directions during an earthquake, it is possible to follow this by moving on the rotating wheel 325.

  In addition to these pulleys, a low friction round bar may be used as the guide mechanism. In such a case, tetrafluoroethylene, polyacetal, polyethylene, or the like is formed on the surface of the low friction round bar. You may do it.

  The coil spring 33 is an elastic member that can be elastically deformed when a tensile stress is applied. As an alternative to the coil spring 33, any other elastic material or member such as rubber may be used. As an alternative to the coil spring 33, a constant load spring described later may be used.

  The coil spring 33 is engaged with the rod-like body 34 and is suspended in the vertical direction, and a wire rod 31 extending vertically upward is connected to the lower end of the coil spring 33. When a vertically downward tensile stress is applied via the wire 31, the coil spring 33 is elastically deformed in the vertical direction. In addition, the coil spring 33 may be in a state in which a preload is applied in advance in a so-called stationary state where a large earthquake has not occurred.

According to the example of FIG. 1, the compression member 35 is fixed to the wall body 36, but is not limited thereto, and may be fixed to the ground or a structure that behaves integrally therewith. Good. The structure that behaves integrally with the ground is, for example, a building structure built on the ground, its floor, ceiling, wall, or the like. Since these are finally connected to the ground and behave integrally with the ground, the compression material 35 may be fixed to them.
The seismic isolation object may be a building structure itself. In such a case, the compression material 35 is often directly fixed to the ground.

  As a method of fixing the compression material 35 to the wall body 36, the plate 43 bonded to the compression material 35 may be bonded to the wall surface of the wall body 36. As a method for joining the plate 43 to the wall body 36, for example, the plate 43 may be fixed by bolts. Incidentally, the plate 43 may reach the upper surface 1a of the floor 1 and further be formed with a bent portion 43a bent in an L shape so as to be parallel to the upper surface 1a. In such a case, the L-shaped bent portion 43a is fixed to the floor 1 with a bolt or the like.

  The compression material 35 is made of, for example, a metal tube having a rectangular cross section or a circular cross section. A coil spring 33 is accommodated in the metal tube. A guide mechanism 32 is attached to the lower end of the compression material 35. A bar-like body 34 corresponding to the fixed end of the coil spring 33 is provided above the compression material 35 or above the upper end of the compression material 35. For example, the rod-shaped body 34 may be fixed by providing a through hole (not shown) in a metal tube constituting the compression member 35 and inserting the through-hole into the through-hole.

  When the upper end of the coil spring 33 is locked to the rod-shaped body 34 provided on the compression material 35, for example, a jig 51 as shown in FIG. 5 may be used. This jig 51 utilizes the principle of the lever, and a hook 52 that is pivotably suspended at an action point located at the tip of a gripping rod 54 extended in the longitudinal direction, and the action point of the action point. And a convex portion 53 provided in the vicinity. With the convex portion 53 of the jig 51 placed on the upper end of the metal tube constituting the compression material 35 and the upper end of the coil spring 33 being engaged with the hook 52, what is the action point of the gripping rod 54? Push the opposite force point downward. Thereby, the coil spring 33 is pulled up by the lever principle through the convex part 53 which comprises a fulcrum. After the coil spring 33 is pulled up in this way, the rod-shaped body 34 is passed through a through hole (not shown) of the compression material 35 and the coil spring 33 is locked thereto.

  FIG. 6 shows a plan view of the entire seismic isolation system 10 to which the present invention is applied. The movable plate 21 is regularly continuous to form one floor as a whole. The above-described seismic isolation system 10 is disposed around the continuous body of the movable plate 21. According to the example of FIG. 5, the continuous body of the movable plate 21 has a rectangular shape, and the wire 31 is extended in a direction orthogonal to these sides. That is, the continuous body of the movable plate 21 is configured such that the seismic isolation system 10 is provided on both sides when viewed in the extending direction of each wire 31. In other words, if the continuous body of the movable plate 21 is stationary with a preload applied to the coil spring 33 in advance, the continuous body of the movable plate 21 is pulled from both sides via the wire 31. In a suspended state.

  Next, operation | movement of the seismic isolation system 10 to which this invention is applied is demonstrated. During an earthquake, the movable plate 21 that supports the seismic isolation object slides on the base 11 in each horizontal direction. In particular, when a large earthquake occurs, an excessive displacement may be applied to the movable plate 21, but the movable plate 21 is connected to the coil spring 33 through the wire 31. As a result of tensile stress being applied to the coil spring 33 in response to the excessive displacement, the coil spring 33 extends inside the compression material 35. In accordance with the extension of the coil spring 33, compressive stress acts between the rod-shaped body 34 and the guide mechanism 32 as shown in FIG. This compressive stress makes it possible to counter the extension of the coil spring 33. As a result, it is possible to prevent the coil spring 33 from being fully extended, so that excessive displacement of the movable plate 21 connected from the coil spring 33 via the wire 31 is restrained and restored to the original position. It becomes possible to act on.

  Moreover, the earthquake is not a displacement in only one direction but a vibration directed in both directions. However, since the seismic isolation system 10 is provided on both sides of the movable plate 21, the movable plate 21 is displaced in one direction. The restoring force from the coil spring 33 on the opposite side can be applied, and when the movable plate 21 is displaced to the other side, the restoring force from the coil spring 33 on the opposite side can be applied. It becomes. By repeatedly executing these operations, the displacement due to the vibration of the movable plate 21 is gradually absorbed.

  In particular, according to the present invention, as shown in FIG. 6, by providing the seismic isolation system 10 around the continuous body of the movable plate 21, any vibration direction caused by the earthquake can be arranged in the vibration direction. When the seismic isolation system 10 is activated, these vibrations can be absorbed.

  At this time, when the coil spring 33 is in a state in which a preload is applied in a stationary state in which no earthquake has occurred, the restoring force of the coil spring 33 can be effectively exhibited. Become. That is, when the preload is not applied to the coil spring 33, when the movable plate 21 is displaced to one side, the restoring force from the coil spring 33 on the opposite side is not so great. On the other hand, when the movable plate 21 is further displaced to one side in a state where the coil spring 33 is pulled in advance, the restoring force of the coil spring 33 can be further increased. It is possible to act so as to restore the original position by restraining the excessive displacement. In addition, according to the present invention, by bending the extending direction via the guide mechanism 32, a particularly large area is not necessary for providing the present system. That is, according to the present invention, it is possible to take measures against seismic isolation even in a narrow space by compiling the overall system configuration more compactly.

  According to the present invention, the constant load spring 331 may be used as an alternative to the coil spring 33 that undergoes linear elastic deformation. The constant load spring 331 may be housed in a box 332 as shown in FIG. When a downward load is applied to the constant load spring 331 via the wire 31, the constant load spring 331 is pulled out from the box 332 and extended. If the load from the wire 31 is in an unloaded state, the constant load spring 331 works in the direction in which it is housed in the box 332. In this process, the load applied to the wire 31 from the constant load spring 331 is constant.

  FIG. 7 shows the relationship of elongation with respect to the tensile load of the coil spring 33. It is shown that the elongation increases linearly with the tensile load. On the other hand, FIG. 8 shows the relationship of elongation to the tensile load of the constant load spring 331. In normal times, the elongation increases rapidly with respect to the tensile load, and during an earthquake, the load is always constant with respect to the elongation.

  By using such a constant load spring 331, a restoring force based on a constant load acts on the movable plate 21, which is preferable from the viewpoint of vibration removal.

  The seismic isolation system 10 to which the present invention is applied may be further embodied in a form as shown in FIG. In the form of FIG. 1, a metal tube is used as the compression material 35 and the coil spring 33 is accommodated therein. In the form of FIG. 9, a metal is used as the compression material 35 ′. A board is used. Fig.9 (a) is a side view in the case of using a metal plate as this compression material 35 ', FIG.9 (b) has shown the top view. The compression member 35 ′ is disposed by opposing two metal plates to each other. A coil spring 33 is wound around the compressed material 35 '. In other words, the compression material 35 ′ made of two metal plates is accommodated in the coil spring 33. A small hole for inserting the rod-like body 34 is formed in one or a plurality of stages in the compression material 35 '. Further, when the coil spring 33 is fixed to the compression member 35 ′, the hook at the upper end of the coil spring 33 is engaged with the rod-like body 34 inserted into any one of the small holes. A guide mechanism 32 is disposed between the two metal plates constituting the compression material 35 '. For example, when the guide mechanism 32 is constituted by a pulley, the rotation shaft of the pulley is inserted through two metal plates constituting the compression member 35 ′ so that the guide mechanism 32 can be rotatably arranged. . The extending direction of the wire 31 is guided to such a guide mechanism 32 as a pulley, and the other end is connected to the coil spring 33.

  Even in the case of using such a compression material 35 ′, it becomes possible to apply a compressive stress between the rod-shaped body 34 and the guide mechanism 32 as shown in FIG. It becomes possible to counter the extension of the coil spring 33 by the compression stress.

  FIG. 10 shows another configuration example of the seismic isolation system 10 to which the present invention is applied. In this example, a through hole 61 is provided in the approximate center of the continuous body of the movable plate 21. A base plate 62 is fixed on the floor 1 exposed through the through hole 61. A plurality of seismic isolation systems 10 are integrated on the base plate 62. In other words, the plurality of compression members 35 are fixed to the base plate 62 in a state of being close to each other or in contact with each other. For this reason, it can be said that the compressed material 35 is fixed to the ground. In addition, in this example, what is necessary is just the one in which the multiple wire 31 is extended | stretched.

  As shown in the cross-sectional view shown in FIG. 11, each compression member 35 accommodates a coil spring 33 therein, and its upper end is locked via a rod-like body 34. Similarly, a guide mechanism 32 is provided at the lower end of the compression member 35. The wire rods 31 connected to the coil springs 33 in the respective compression members 35 have different extending directions. In the example shown in FIG. 10, the extending direction of the wire 31 is adjusted so as to be 90 ° apart from each other. The other end of the wire 31 is fixed to the movable plate 21 via the fixing member 42 and the connection member 41. That is, one end of the wire 31 is connected to the compression member 35 connected to the ground, and the other end is connected to the movable plate 21.

  Even in such a configuration, when an earthquake occurs, an excessive displacement of the movable plate 21 can be restrained by the same mechanism so as to restore the original position. In particular, in the example shown in FIG. 10, the four compression members 35 are arranged in a substantially central manner, and the wires 31 are extended outward from the compression members 35 at intervals of 90 °. For this reason, even if the vibration at the time of an earthquake is a thing of all directions, it becomes possible to absorb a vibration via the coil spring 33 connected to the wire 31 of the extending | stretching direction according to this. The wire 31 only needs to be stretched in at least two different directions.

  The example shown in FIG. 12 is a modification of FIG. 10, but the movable plate 21 is provided with openings 61 at a plurality of locations, and one compression member 35 is provided in each opening 61, and directed to each guide mechanism 32. The two wire materials 31 that have been stretched in this way are guided to the compression material 35 with the direction of stretching of the two wire materials 31 directed substantially in one direction. The extending directions of the wire 31 extended toward the guide mechanism 32 between the openings 61 at a plurality of locations are made different from each other. In the example of FIG. 12, the angle formed by the two wire rods 31 continuing to one compression member 35 is 180 °. The angles formed between the two wire rods 31 in one opening 61 and the two wire rods 31 in the other opening 61 are different from each other. A base plate 62 is fixed on the floor 1 exposed through the through hole 61. One compression member 35 is fixed to the base plate 62 as shown in the sectional view of FIG. The compression material 35 accommodates one coil spring 33 therein, and its upper end is locked via a rod-shaped body 34. A plurality of guide mechanisms 32 are provided at the lower end of the compression member 35. A plurality of wire rods 31 are attached to the hook at the lower end of the coil spring 33, and each wire rod 31 is guided by different guide mechanisms 32. As a result, the wire 31 can be guided through the guide mechanism 32 so as to have different stretching directions. Similarly, the other end of each wire 31 is connected to the movable plate 21. Although it is ideal that the angle formed by the drawing direction of the wire 31 is an orthogonal direction, the angles may not be the same.

  According to such a configuration, when a tensile stress is applied from one wire 31 when an earthquake occurs, the other wire 31 always bends. For this reason, even if the coil spring 33 is shared among the plurality of wire rods 31, no particular problem occurs. Further, if the four wire rods 31 are extended in different directions with respect to one compression member 35, the origin is restored after the earthquake. However, the present invention is not limited to this, and one coil spring is not limited thereto. The two wire rods 31 may be connected to 33 or the constant load spring 331. In such a case, the minimum condition for the movable plate 21 to return to the origin is that it is connected to one coil spring 33 or a constant load spring 331 via the wire 31 from at least two planarly dispersed locations. . At this time, the angles formed by the two wire rods 31 from the two locations may be different from each other, but may be 180 ° or desirably 90 °.

  Further, in the example of FIG. 14, the wire 31 is extended outward from each side of the continuous body of the movable plate 21, and these are guided through the pulley 71 and are collected at a desired location. Actually, the wire 31 is guided toward a desired location while traveling around the continuous body of the movable plate 21. The wire rods 31 gathered in one place are attached to the compression member 35 by either method of FIG. 11 or FIG. Thereby, it becomes possible to exhibit the same effect as the above-mentioned. In the example of FIG. 14, the minimum condition for the movable plate 21 to return to the origin is at least three on the outer periphery via the guide mechanism 32 (four in the example of FIG. 14) and one coil spring 33. Alternatively, it is assumed that three wire rods 31 (four in the example of FIG. 14) are connected to the constant load spring 331. It is desirable that the wire rods 31 fixed to both sides facing each other with the movable plate 21 extend in directions different from each other by 180 °. A preload may be applied to the coil spring 33 or the like, or it may not be applied. Moreover, it is desirable that the wire rods 31 fixed to the sides orthogonal to each other in the movable plate 21 extend in directions different from each other by 90 °.

  In the example shown in FIGS. 15 and 16, the compression material 35 is not fixed to the wall body 36 but is fixed to the floor 1. In the form of FIG. 15, the same components and members as those in FIG. 1 described above are denoted by the same reference numerals, and the following description is omitted.

  The compression material 35 is fixed to the floor 1 in a state where it is laid horizontally. At this time, the compression material 35 can be fixed by joining the mounting plate 43b provided at the end of the compression material 35 to the floor 1 with, for example, a bolt or the like. The wire 31 that has been stretched in a direction substantially perpendicular to the side of the movable plate 21 is guided by the guide mechanism 32 so that the stretch direction is bent and is parallel to the side of the movable plate 21. The coil spring 33 incorporated in the compression member 35 is also arranged so as to be extendable and contractible in the direction parallel to the side of the movable plate 21, and the wire 31 guided through the guide mechanism 32 is connected thereto. Thereby, it becomes possible to exhibit the same effect as the above-mentioned. In this example as well, it is needless to say that a configuration in which the compression material 35 is built in the coil spring 33 as shown in FIG. 9 may be adopted.

  The compressed material 35 is not limited to being fixed to the floor 1. For example, when the movable plate 21 is placed on the base 11, the compression material 35 may also be fixed on the base 11. Since the base 11 is fixed to the floor 1 and the ground, it can be considered that the compression material 35 is also fixed to the ground.

  In the examples of FIGS. 17 and 18, an example in which the compression material 35 is fixed to the movable plate 21 is shown. A plurality of compression members 35 are fixed on the substantially central surface of the movable plate 21, and the wire 31 is extended from a coil spring 33 attached to each compression member 35. The wire rods 31 are stretched in different directions, and may be, for example, directions orthogonal to each other at 90 ° intervals.

  In the example of FIG. 17, the guide mechanism 32 may be provided on the compression material 35, but the guide mechanism 32 may be provided at the peripheral end of the continuous body of the movable plate 21 in addition to this. The guide mechanism 32 may use a swing pulley with a swing function so as to cope with a twist caused by the displacement mode of the movable plate 21 during an earthquake. A peripheral end of the wire 31 guided by the guide mechanism 32 is attached to the wall body 36 or the floor 1.

  Also in this form, according to the extension of the coil spring 33, it becomes possible to apply a compressive stress between the compression member 35 and the guide mechanism 32 as shown in FIG. It becomes possible to counter the stretching. Moreover, even if the compression material 35 is fixed to the movable plate 21, it is possible to absorb vibration caused by an earthquake in the same manner.

  Moreover, FIG. 19 has shown the structure which seismically isolates by applying this invention about the seismic isolation object 90 actually. The seismic isolation object 90 is placed on a vehicle 98 having a movable caster 96 disposed below. The vehicle 98 is provided with a constant load spring 92 housed in the box 91. A wire 31 is attached to the lower end of the constant load spring 92. A plurality of the wires 31 may be attached. In such a case, as shown in FIG. 19, the wires 31 are guided through the guide mechanism 32 while being crossed, and the terminal ends thereof are fixed to the floor 1. Good.

  Due to the earthquake, the vehicle 98 on which the seismic isolation object 90 is placed is displaced left and right in the figure, but the wire 31 is pulled according to the left and right displacement, and the constant load spring 92 is pulled out. Even in such a case, it is possible to exhibit the same function and effect based on the same mechanism as in FIG. In particular, according to the configuration of FIG. 19, since the two wire rods 31 are stretched in opposite directions, the restoring force can be further strengthened. Furthermore, according to the present invention, the compression material 35 may be incorporated in the wall body 36 or the floor 1. The compression member 35 is provided with a guide mechanism 32 as described above. Since the structures of the compression member 35 and the guide mechanism 32 are both built in the wall body 36 or the floor 1, the wire 31 connected to the guide mechanism 32 is arranged outside the wall body 36 or outside the floor 1. The wall body 36 or the floor 1 may be provided with a long hole for extending in the vertical direction. By making the hole for taking out the wire 31 to be a long hole, the wire 31 can move in the long hole even when twisted or fluctuated due to an earthquake is applied. It becomes possible to do.

DESCRIPTION OF SYMBOLS 1 Floor 7 Base-isolated floor 10 Base-isolated system 11 Base 12 Convex-curved surface part 21 Movable plate 31 Wire material 32 Guide mechanism 33 Coil spring 34 Rod-shaped body 35 Compression material 36 Wall body 41 Connection member 42 Fixing member 43 Plate 51 Jig 52 Hook 53 Convex 54 Grasping rod 61 Through hole 62 Base plate 71 Pulley 90 Seismic isolation object 91 Box 92, 331 Constant load spring 96 Caster 98 Car 321 Pulley 322 Rotating part 325 Rotating wheel 326 Central shaft 327 Edge 332 Box

Claims (11)

In seismic isolation systems that absorb seismic motion of seismic isolation objects,
A movable part that supports the seismic isolation object;
A guide mechanism for guiding the extending direction of the wire whose one end is connected to the movable part to another direction;
An elastic member that is elastically deformable and connected to the wire guided in the other direction by the guide mechanism;
A seismic isolation system, characterized by comprising a compression material fixed to the ground or a structure that behaves integrally therewith and to which the fixed end of the elastic member and the guide mechanism are connected. The seismic isolation system according to claim 1, wherein the compression material is loaded with a compression force based on a reaction force of elastic deformation by the elastic member between a fixed end of the elastic member and the guide mechanism. The seismic isolation system according to claim 1 or 2, wherein the wire is wound around the guide mechanism over one turn or more. The seismic isolation system according to any one of claims 1 to 3, wherein the elastic member is preloaded with a preload. The seismic isolation system according to claim 1, wherein the elastic member is a constant load spring. The compression member is laid on the wall surface of the structure located around the movable part, or on the floor or base on which the movable part is placed so that the elastic member can be elastically deformed in a substantially horizontal direction. The seismic isolation system according to claim 1, wherein the seismic isolation system is fixed. The seismic isolation system according to claim 6, wherein the compression material is fixed on the floor and attached to a base on which the movable part is placed. A plurality of the compression members are provided in an opening formed substantially at the center of the movable portion, and the extension direction of the plurality of wires extended toward the respective guide mechanisms is directed to the compression member in a substantially one direction. The seismic isolation system according to any one of claims 1 to 6, characterized by being guided. The seismic isolation system according to any one of claims 1 to 6, wherein the movable part is formed by fixing a plurality of wires extending from different directions at substantially the center thereof. The seismic isolation system according to claim 9, wherein the plurality of wires guided upward are connected to one elastic member. The movable part is provided with openings at a plurality of locations, and one compression material is provided in each opening, and the extending direction of the two wire members that have been extended toward the respective guide mechanisms is directed substantially in one direction. Guided to the compressed material,
The seismic isolation system according to any one of claims 1 to 6, characterized in that the extending direction of the wire extending toward the guide mechanism is different between the openings at the plurality of locations.

Images