JP2017166651A - Seismic isolator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized seismic isolator that can be manufactured in simple and less-expensive manner not requiring any special attention when an object to be protected against vibration such as earthquake or the like is installed on the seismic isolator and further seismic isolation performance is scarcely influenced by a position of the object mounted.SOLUTION: A seismic isolator 1 comprises: a mounting table 3 on which an object to be protected against damage caused by vibration is installed; a base table 2; and a lateral oscillation seismic isolation mechanism 4 arranged between the base table 2 and the mounting table 3. The lateral oscillation seismic isolation mechanism 4 comprises: a horizontal transferring part capable of moving the mounting table 3 placed at an intermediate position horizontally with respect to the base table 2 and reaching up to a horizontal limit position; and a rotating and transferring part capable of rotating the mounting table 3 transferred to the horizontal limit position in a direction moving apart from the intermediate position around a point placed at a higher position than a composition position of a center of gravity of the mounting table 3 and a center of gravity of the object on the mounting table 3.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a seismic isolation device for protecting an object from damage caused by vibration such as an earthquake.

  Conventionally, various seismic isolation devices have been proposed in order to protect objects such as works of art, precision instruments, and buildings from damage caused by vibrations such as earthquakes. Among these devices, a rolling seismic isolation device is known that uses a combination of a horizontally extending rail and a traveling body such as a roller that can travel on the rail.

  For example, Patent Document 1 (Japanese Patent Laid-Open No. 10-61719) discloses a seismic isolation device suitable for protecting exhibition items stored in an exhibition case such as an art work, an antique, or a precision instrument in an art museum or a museum. The base, a movable base that is placed on the top surface of the base in a superposed state, and a vibration base such as an earthquake that guides the horizontal movement of the movable base to absorb the vibration energy And a seismic isolation device having an energy shut-off means. The energy cutoff means in the seismic isolation device of the specific example includes an outer member fixed to one of a base and a movable base formed in a substantially square shape, and an inner member that travels in the outer member fixed to the other. It is composed of slide rails, and when the earthquake occurs, the vibration energy is absorbed by the extension of the slide rails. The size of the base and the movable base in the seismic isolation device of this specific example is set to a maximum of about 400 mm in length and breadth, and the displacement of the movable base relative to the base is set to a single amplitude of 230 mm (both amplitudes of 460 mm). ing.

  Although such a roll-isolation device using horizontal reciprocating motion with respect to the base of the movable platform has high seismic isolation performance, it absorbs energy by shaking exceeding the moving limit of the movable platform and long-period motion of high-rise buildings, etc. Therefore, a mechanism for giving resistance in the moving direction is required when the moving limit is approached. As a method of giving resistance, in addition to the method of using the friction and spring shown in Patent Document 1, the method of using a hydraulic damper, etc., the rail end is inclined in the vertical direction, and the lateral movement energy is positioned. Methods for converting to energy are known.

  For example, FIG. 1 of Patent Document 2 (Japanese Patent Publication No. 6-74609) shows a supported as a seismic isolation device used for isolating and supporting a supported body such as a building, a computer, or other mechanical equipment. A rolling element supported on one side of the body and the support so as to be able to roll around a predetermined axis, and a curved surface projecting downward for running the rolling element attached to the other side FIG. 17 and FIG. 18 of this document show a seismic isolation device that includes a guide member that includes a guide member and that causes the rolling element to roll and gradually raise the supported body when the supported body moves relative to the support. Shows a seismic isolation structure in which the four seismic isolation devices displaceable in the same direction are arranged at the four corners of a rectangular mounting plate (movable base) attached to the lower surface of the supported body. According to this structure, when the supported body moves relative to the support body, the supported body gradually rises while maintaining the level.

  Further, for example, in FIG. 1 of Patent Document 3 (Japanese Patent Laid-Open No. 11-82618), a pair of front and rear guide portions erected in parallel with opposing edge portions of a substantially square plate-like bottom plate, Each of the front and rear guide grooves has a pair of lower concave guide grooves (front and rear guide grooves) that are provided at opposite positions of the front and rear guide parts and extend in the front and rear direction, and the central part forms the lowermost part, and a rectangular plate shape. The left and right guide portions having two fitted wheels on both short side surfaces and the left and right guide portions are provided on both long side surfaces and extend in the left and right direction, and the central portion is A pair of lower concave guide grooves (left and right guide grooves) forming the lowermost part, a substantially square plate-like support base on which the supported body is to be placed, and two wheels fitted in each of the left and right guide grooves; There has been proposed a seismic isolation device including a support member (movable base) having According to this seismic isolation device, when the left and right guide portions move with respect to the bottom plate, the left and right guide portions gradually tilt and swing, and when the support base moves with respect to the left and right guide portions, the support base gradually moves. (See FIG. 6 of this document). It is described that the downward concave shape of the left and right guide grooves or the front and rear guide grooves is, for example, a shape in which the vertical cut surface has a constant or variable curvature, alone or in combination, such as an arc, a parabola, a hyperbola, a straight line, etc. (See paragraph 0005 of this document) However, the shape of the guide groove in the device specifically shown in this document is that the vertical cut surface is arc-shaped or V-shaped, or the wheel at the time of non-vibration is used. It consists of a horizontal portion to be supported and a linear inclined portion inclined upward from the horizontal portion toward the end of the guide groove.

JP 10-61719 A Japanese Examined Patent Publication No. 6-74609 Japanese Patent Laid-Open No. 11-82618

  As understood from Patent Literature 1, in order to install a roll seismic isolation device using horizontal reciprocating motion on a floor surface or the like, the space occupied by the device itself (in the example of Patent Literature 1, vertical and horizontal are about 400 mm at the maximum). In addition, a space for allowing the displacement of the movable table relative to the base (in the example of Patent Document 1, the displacement amount is 230 mm in one amplitude) is required. Due to this large space requirement, the conventional seismic isolation device using horizontal reciprocating motion is generally used only for objects that are large and have economic value. In order to support a large object, a strong structure is required for the seismic isolation device, and in order to achieve a robust structure, an expensive device is required. This is one of the factors that do not spread to ordinary households, stores and offices. Therefore, it is small, simple and inexpensive that can be widely used to protect relatively small and unrealistic objects such as ceramics, glass tableware, liquor bottles, bookshelves, etc. There is a strong demand for seismic isolation devices that can be manufactured easily.

  Although the devices of Patent Literature 2 and Patent Literature 3 can reduce the space for displacement of the movable table as compared with the device of Patent Literature 1, the device of Patent Literature 2 is a seismic isolation device. Since a force in the opposite direction to the applied horizontal force is applied to the object, the position of the object on the movable table may shift or fall or fall when experiencing a large amplitude roll. Sufficient seismic isolation performance cannot be obtained. Further, among the devices shown in Patent Document 3, in the case where there is no horizontal portion in the guide groove, depending on the position of the center of gravity of the object on the movable table, the movable table is greatly inclined, so that the mounting work is meticulous. There is a risk of the object falling if care is not taken. A device having a guide groove with an arc-shaped vertical cut surface converts horizontal acceleration applied to an object by seismic waves into pendulum motion, but the characteristic vibration of the pendulum depends on the distance between the fulcrum and the center of gravity. Since the number is determined, when a vibration with a frequency close to this is applied, a resonance phenomenon occurs, and the seismic wave is rather amplified. Furthermore, in an apparatus having a guide groove composed of a horizontal portion at the center of the guide groove and an inclined portion at the end of the guide groove, an accurate pendulum movement of the object cannot be realized at the end of the guide groove, and thus a large amplitude roll is experienced. In such a case, there is a risk that the position of the object on the movable table may be shifted or the object may fall or fall.

  Accordingly, an object of the present invention is a seismic isolation device that can be manufactured in a small, simple and inexpensive manner so that it can be widely used for the protection of small objects and inexpensive objects. It is to provide a seismic isolation device that does not require special care when placing an object to be protected from vibrations of the device on the device, and the seismic isolation performance is not greatly affected by the position of the placed object. .

The above issues are
A mounting table on which objects to be protected from vibration damage are placed;
A base disposed below the mounting table;
A roll seismic isolation mechanism that is arranged between the base and the table described above and reciprocates the table in a predetermined direction with respect to the base when a vibration occurs.
A seismic isolation device comprising:
The rolling seismic isolation mechanism
A horizontal transfer unit capable of horizontally moving the mounting table in a neutral position with respect to the base to reach a horizontal limit position;
The above-described mounting table transferred to the horizontal limit position by the horizontal transfer unit from the neutral position centered on a point that is higher than the combined position of the center of gravity of the mounting table and the center of gravity of the object on the mounting table A rotary transfer section capable of rotating in a direction away from the
This is solved by the seismic isolation device of the present invention.

  In the present invention, the “neutral position” means that only a slight vibration is generated when no vibration is generated, or even if the vibration is generated, the mounting table on which the object is placed does not move. Sometimes it means the position occupied by each component. This seismic isolation device has a roll seismic isolation mechanism capable of moving a mounting table on which an object is mounted in one direction within a horizontal plane with respect to a base.

  This seismic isolation device has a relatively simple configuration, and can be manufactured in a small size and at a low cost. In addition, in the neutral position of the seismic isolation device, the mounting surface on which the object is placed is placed horizontally so that the object does not fall. Since it is moved horizontally by the transfer unit, the mounting surface of the mounting table is kept horizontal even during horizontal movement. Therefore, the mounting table does not tilt when placing the object on the mounting table, and no special attention is required for the mounting operation. Further, in this seismic isolation device, when the mounting table reaches a limit position (horizontal limit position) where horizontal movement is possible, a position higher than the combined position of the center of gravity of the mounting table and the center of gravity of the object on the mounting table. The tangent of the circle centered on the point P is located on the horizontal mounting surface of the mounting table, and if further strong vibration is applied, the above mounting surface is described above by the rotary transfer unit. Rotation is performed in the direction away from the neutral position around the point P. Accordingly, accurate pendulum movement of the mounting table is realized by the rotary transfer unit. The object on the mounting surface of the mounting table receives a force in a direction perpendicular to the mounting surface during the pendulum movement, and the seismic isolation performance is not greatly affected by the position of the target on the mounting table.

The above issues are also
A mounting table on which objects to be protected from vibration damage are placed;
A base disposed below the mounting table;
An intermediate base disposed between the base and the table described above;
An intermediate platform roll-isolating mechanism that is disposed between the base and the intermediate base and reciprocates the intermediate base in a predetermined direction with respect to the base when a vibration occurs;
It is arranged between the intermediate table and the above-mentioned table, and when the vibration occurs, the above-mentioned table is reciprocated with respect to the intermediate table in a direction perpendicular to the reciprocating direction of the intermediate table in the intermediate-base roll isolation mechanism. Mounting base roll isolation mechanism,
A seismic isolation device comprising:
The table rolls seismic isolation mechanism described above is
A mounting table horizontal transfer unit capable of horizontally moving the mounting table in the neutral position with respect to the intermediate table to reach the mounting table horizontal limit position;
The above-mentioned mounting table transferred to the above-mentioned mounting table horizontal limit position by the mounting table horizontal transfer unit, centering on a point that is higher than the combined position of the center of gravity of the above-mentioned mounting table and the center of gravity of the object on the above-mentioned mounting table A mounting table rotation transfer unit capable of rotating in a direction away from the neutral position of the mounting table;
Have
The above-mentioned intermediate base roll isolation mechanism
An intermediate platform horizontal transfer unit capable of horizontally moving the intermediate platform in a neutral position with respect to the base to reach an intermediate platform horizontal limit position;
The intermediate platform transferred to the intermediate platform horizontal limit position by the intermediate body horizontal transfer unit is another point at a position higher than the combined position of the center of gravity of the mounting table and the center of gravity of the object on the mounting table. An intermediate stage rotation transfer unit capable of rotating in a direction away from the neutral position of the intermediate stage as a center;
This is solved by the seismic isolation device of the present invention.

  Also in this invention, the “neutral position” means that only a slight vibration is generated when no vibration is generated, or even if the vibration is generated, the mounting table on which the object is placed does not move. When not, it means the position occupied by each component. This seismic isolation device is a roll-free device that can move a mounting table on which an object is mounted in one direction (X direction) in a horizontal plane and a direction perpendicular to it (Y direction) with respect to the base. Has a seismic mechanism.

  This seismic isolation device has a relatively simple configuration, and can be manufactured in a small size and at a low cost. Further, in the neutral position of the seismic isolation device, the mounting surface on which the object of the mounting table is placed is naturally arranged so that the object does not fall, and the intermediate table is also mounted on the mounting surface of the mounting table. However, since the above table and the intermediate table are first moved horizontally by the above table horizontal transfer unit and the intermediate table horizontal transfer unit, the above table and the intermediate table are also moved during the horizontal movement. The mounting surface is kept horizontal. Therefore, the mounting table does not tilt when placing the object on the mounting table, and no special attention is required for the mounting operation. Further, in this seismic isolation device, when the mounting table reaches the mounting table horizontal limit position, a point P that is higher than the combined position of the center of gravity of the mounting table and the center of gravity of the object on the mounting table is centered. The tangent of the circle is located on the horizontal mounting surface of the mounting table, and if further strong vibration is applied, the above mounting surface is centered on the point P described above by the mounting table rotation transfer unit As a rotational movement away from the neutral position. Therefore, accurate pendulum movement of the mounting table is realized. Further, when the intermediate platform reaches the intermediate platform horizontal limit position, a circle centered on another point P ′ located at a position higher than the combined position of the center of gravity of the mounting table and the center of gravity of the object on the mounting table. Is located in the horizontal plane of the intermediate platform, and if further strong vibration is applied, the intermediate platform is moved away from the neutral position around the point P ′ described above by the intermediate platform rotation transfer unit. It can be rotated. Therefore, accurate pendulum movement of the intermediate stage is realized. The object on the mounting surface of the mounting table receives a force in a direction perpendicular to the mounting surface during the pendulum movement, and the seismic isolation performance is not greatly affected by the position of the target on the mounting table.

  The seismic isolation device of the present invention has a relatively simple configuration, and can be manufactured in a small size at a low cost. Further, according to the seismic isolation device of the present invention, since the mounting table having a horizontal mounting surface in the neutral position for mounting the object is first moved horizontally when the vibration occurs, when the object is mounted on the mounting table The mounting table does not tilt and no special attention is required for the mounting work. Furthermore, in the rotational transfer after the horizontal transfer of the mounting table, an accurate pendulum movement of the mounting table is realized, so that the seismic isolation performance is not greatly affected by the position of the object on the mounting table.

It is the schematic which showed the seismic isolation apparatus of one Embodiment of this invention, (a) has shown the front view, (b) has shown the side view. It is the schematic for demonstrating the movement with respect to the base of the mounting base in the seismic isolation apparatus shown in FIG. 1, (a) is a state in which a mounting base is in a neutral position, (b) is a mounting base in a horizontal limit position. (C) shows the state where the mounting table is rotated. In the seismic isolation apparatus shown in FIG. 1, it is the schematic for demonstrating the state which has a mounting base in a horizontal limit position. In the seismic isolation apparatus shown in FIG. 1, it is the schematic for demonstrating the state by which the mounting base is rotationally moved. It is the schematic for demonstrating a mode that the target object on a mounting base carries out a pendulum motion with the seismic isolation apparatus shown in FIG. It is the schematic which showed the deformation | transformation form of the seismic isolation apparatus shown in FIG. 1, (a) has shown the lower surface side of the mounting base, (b) has each shown the upper surface side of the base. It is the schematic which showed the seismic isolation apparatus of another embodiment of this invention, (a) is the front view, (b) has shown the side view. It is the schematic for demonstrating the movement with respect to the base of the intermediate stand in the seismic isolation apparatus shown in FIG. 7, (a) is a state in which an intermediate stand is in a neutral position, (b) is an intermediate stand in a horizontal limit position. (C) shows the state in which the intermediate stage is rotationally moved. In the seismic isolation apparatus shown in FIG. 7, it is the schematic for demonstrating the state in which an intermediate stand exists in a horizontal limit position. In the seismic isolation apparatus shown in FIG. 7, it is the schematic for demonstrating the state by which the intermediate stand is rotationally moved. FIGS. 8A and 8B are schematic diagrams for explaining movement of the mounting table relative to the intermediate table in the seismic isolation device shown in FIG. 7, in which FIG. 7A shows a state where the mounting table is in a neutral position, and FIG. A state (c) shows a state where the mounting table is rotated. In the seismic isolation apparatus shown in FIG. 7, it is the schematic for demonstrating the state which has a mounting base in a horizontal limit position. FIG. 8 is a schematic diagram for explaining a state where the mounting table is rotationally moved in the seismic isolation device shown in FIG. 7. It is the schematic for demonstrating a mode that the target object on a mounting base rotates (pendulum) by the seismic isolation apparatus shown in FIG. 1, (a) is mounting by rotation (pendulum) movement with respect to the base of an intermediate | middle base. The rotation of the mounting table is shown, and (b) shows the rotation (pendulum) movement of the mounting table with respect to the intermediate table.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments.

(1) One-way seismic isolation devices Some of the objects that are installed inside buildings such as ordinary households, stores, and offices and that should be protected from damage due to earthquakes, such as earthquakes, are urns, bookshelves, cupboards Many of them have a rectangular shape in plan view. These objects are often arranged along the walls of the building, and therefore seismic isolation performance in all directions is rarely required. In addition, such objects are unlikely to fall due to vibrations in the extension direction of the long side, while vibrations in the extension direction of the short side are caused by the fall of these objects or books, tableware, etc. contained in them. It is a dangerous vibration that is directly connected to the fall. The seismic isolation device according to the first embodiment of the present invention described with reference to FIGS. 1 to 5 has a rectangular shape in such a plan view and is arranged so that the long side faces the wall of the building. This is a seismic isolation device that is suitably used to prevent a target object from falling in a direction away from the wall. The seismic isolation device of the first embodiment has a relatively simple configuration, and can be manufactured in a small size at low cost.

  Drawing 1 is a schematic diagram in the neutral position of seismic isolation device 1 of a 1st embodiment, (a) shows a front view and (b) shows a side view. The seismic isolation device 1 has a base 2 made of a rectangular flat plate, and the base 2 is arranged on the floor F of the building so that one of the long sides 2a faces the wall W of the building. Yes. At a position along the short side 2b of the upper surface 2c of the base 2, the pair of roll isolation mechanisms 4 are symmetric with respect to a plane perpendicular to the base 2 and passing through the midpoint of the long side 2a. The mounting table 3 having substantially the same shape as the base 2 is disposed on the roll seismic isolation mechanism 4. The upper surface 3c of the mounting table 3 is a mounting surface for mounting an object.

  Each roll seismic isolation mechanism 4 is disposed on one end side of the short side 3 b of the mounting table 3 and extends downward, and is attached to the tip of the upper holding body 41. An upper roller 42 that is rotatable in the extending direction of the short side 3b, and extends from the other end of the short side 3b of the mounting table 3 to the vicinity of the center of the short side 3b and extends below the mounting table 3. The upper support 47, the upper guide 48 provided at the front edge of the upper support 47, and the lower support 2 disposed on one end side of the short side 2b of the base 2 and extending upward. Side holder 45, lower roller 46 attached to the tip of lower holder 45 and rotatable in the extending direction of short side 2b, and short side 2b from the other end of short side 2b of base 2 A lower support 43 extending near the center of the base 2 and extending above the base 2; And a, a lower guide 44 provided in the tip edge portion of the side support 43. The upper holding body 41 and the lower support body 43 are disposed at positions facing each other, the lower holding body 45 and the upper support body 47 are disposed at positions facing each other, and the upper guide 48 is moved downward when a vibration occurs. The lower guide 44 is for causing the upper roller 42 to travel when vibrations occur. A lower barrier 43e for preventing the upper roller 42 from dropping off from the lower guide 44 is further provided at the front edge of the lower support 43, and further on the front edge of the upper support 47. An upper barrier 47e is provided for preventing the lower roller 46 from falling off the upper guide 48.

  FIG. 2 is a schematic diagram for explaining the transfer of the mounting table 3 to the base 2 by the roll seismic isolation mechanism 4 of the seismic isolation device 1. However, in FIG. 2, the lower barrier 43e and the upper barrier 47e are omitted for easy understanding. Fig.2 (a) is a figure which shows the neutral position of the seismic isolation apparatus 1 corresponding to FIG.1 (b). In the neutral position, the lower guide 44 includes a horizontal portion 44a that extends horizontally, and a curved portion 44b that extends downward while curving from one end of the horizontal portion 44a toward the lower holding body 45. The upper guide 48 includes a horizontal portion 48a that extends horizontally and a curved portion 48b that extends downward from one end of the horizontal portion 48a while curving toward the upper holding body 41. Yes. The length of the horizontal portion 44 a of the lower guide 44 and the horizontal portion 48 a of the upper guide 48 and the length of the curved portion 44 b of the lower guide 44 and the curved portion 48 b of the upper guide 48 are set so that the upper roller 42 Just as the lower roller 46 is in contact with the horizontal portion 48a of the upper guide 48 when in contact with the horizontal portion 44a, the lower roller 46 is in the upper side when the upper roller 42 is in contact with the curved portion 44b of the lower guide 44. Each is set so as to be in contact with the curved portion 48 b of the guide 48. In the seismic isolation device 1 of the present embodiment, the horizontal transfer portion of the roll seismic isolation mechanism 4 includes the horizontal portion 44a of the lower guide 44, the upper roller 42 that travels on the horizontal portion 44a, and the horizontal portion of the upper guide 48. 48a and a lower roller 46 traveling on the horizontal portion 48a. Further, the rotational transfer portion of the roll seismic isolation mechanism 4 travels the curved portion 44b of the lower guide 44, the upper roller 42 that travels through the curved portion 44b, the curved portion 48b of the upper guide 48, and the curved portion 48b. A lower roller 46 is included.

  FIG. 2B shows a state in which the mounting table 3 is moved to the horizontal limit position with respect to the base 2 by the horizontal transfer unit of the roll seismic isolation mechanism 4. The horizontal limit position means a limit position where the mounting table 3 can move horizontally with respect to the base 2. Specifically, the upper roller 42 is connected to the horizontal portion 44 a and the curved portion 44 b of the lower guide 44. The lower roller 46 is in contact with the connecting position of the horizontal portion 48a and the curved portion 48b of the upper guide 48. The connection position between the horizontal portion 44a and the curved portion 44b of the lower guide 44 and the connection position between the horizontal portion 48a and the curved portion 48b of the upper guide 48 reduce the impact when the upper roller 42 and the lower roller 46 pass. In addition, it is preferably chamfered. FIG. 3 is a view corresponding to FIG. 2B, but in the seismic isolation device 1 of the present embodiment, when the mounting table 3 reaches the horizontal limit position with respect to the base 2, the upper guide 48 is curved. The part 48b forms a part of a circle C1 centered on a point P existing on a vertical line L passing through a midpoint of a straight line passing through the base end of the upper support 47 on the lower surface 3d of the mounting table 3, The curved portion 44b of the guide 44 is configured to form a part of a circle C2 centered on the point P. The circle C1 and the circle C2 are concentric circles. Therefore, the tangent line of the concentric circle C3 with the point P as the center passes through the mounting surface 3c of the mounting table 3. In addition, although the height of the point P exists in the position higher than the synthetic | combination position of the gravity center of the mounting base 3 and the gravity center of the target object on the mounting base 3, in the seismic isolation apparatus 1 of this Embodiment, it is assumed. The position of the point P is set in advance in consideration of various objects. When the position of the center of gravity of the object is extremely high, the radii of the circle C1 and the circle C2 become extremely large, so that the arcs of the curved portion 44b of the lower guide 44 and the curved portion 48b of the upper guide 48 are substantially linearly approximated. Will be.

  FIG. 2 (c) shows a state where the mounting table 3 is rotated by the rotation transfer unit of the roll seismic isolation mechanism 4. FIG. 4 is a diagram corresponding to FIG. In the seismic isolation device 1 of the present embodiment, when the mounting table 3 reaches the horizontal limit position with respect to the base 2, the curved portion 48 b of the upper guide 48 forms a part of the circle C <b> 1 centered on the point P. In addition, since the curved portion 44b of the lower guide 44 is configured to form a part of the circle C2 centered on the point P, when the mounting table 3 is rotated, the point P is the center. The tangent line of the concentric circle C3 is rotated so as to pass through the mounting surface 3c of the mounting table 3. Therefore, the reciprocation of the rotational motion of the mounting table 3 by the rotational transfer unit of the roll seismic isolation mechanism 4 is an accurate pendulum motion.

  Next, operation | movement of the seismic isolation apparatus 1 of this Embodiment is demonstrated. As shown in FIG. 2 (a), when there is no vibration at all, or when there is only a weak vibration that does not move the mounting table 3 on which the object is placed even if the vibration is generated. In addition, the mounting table 3 exists at a position overlapping the base 2, and the mounting surface 3c is maintained horizontally. Therefore, when placing the object on the placing table 3, the placing table 3 does not tilt, and no special attention is required for the placing work. When an earthquake occurs and the base 2 moves to the left side of FIG. 2, the horizontal portion 44 a of the lower guide 44 of the roll seismic isolation mechanism 4 is moved to the upper roller 42 by the inertial force applied to the mounting table 3 on which the object is placed. The lower roller 46 travels on the horizontal portion 48 a of the upper guide 48, and the mounting table 3 is moved horizontally with the mounting surface 3 c kept horizontal with respect to the base 2. Although the horizontal movement distance of the mounting table 3 with respect to the base 2 depends on the intensity of the earthquake, the horizontal movement is possible until the horizontal limit position shown in FIG. When the base 2 at the horizontal limit position further moves to the left side of FIG. 2 by the distance x, the upper roller 42 travels on the curved portion 44b of the lower guide 44 of the roll seismic isolation mechanism 4, and the curved portion of the upper guide 48 The lower roller 46 travels through 48b, the mounting table 3 is rotated around the point P (see FIG. 4), and the earthquake acceleration energy corresponding to the distance x is absorbed by the rotating motion. Due to the principle of pendulum movement, when the acceleration is small even if the distance x is the same, the inclination angle of the mounting surface 3c of the mounting table 3 becomes small. Therefore, the mounting table 3 of the seismic isolation device 1 reciprocates with respect to the base 2 between the state shown in FIG. 2C and the state shown in FIG. Further, when the earthquake stops, a position where the upper roller 42 contacts the horizontal portion 44a of the lower guide 44 and the lower roller 46 contacts the horizontal portion 48a of the upper guide 48 due to gravity acting on the object or the like, That is, the mounting table 3 stops at a position where the mounting surface 3c of the mounting table 3 is kept horizontal.

  When an object to be protected from damage due to vibration is placed on the mounting table 3, it is preferable that the object is located on the center of gravity of the mounting table 3. In the seismic isolation device 1, sufficient seismic isolation performance can be obtained even if the center of gravity of the object is shifted from the position on the center of gravity of the mounting table 3. FIG. 5 is a diagram showing a rotation (pendulum) movement from the horizontal limit position of the mounting table 3 when the object O is mounted on the mounting table 3. In this figure, when the object O is arranged so that the combined position of the center of gravity of the object O and the center of gravity of the mounting table 3 is located at a position g1 on the vertical line M passing through the point P (represented by a one-dot chain line). .) And the case where the object O is arranged so as to be located at the position g2 shifted to the left side in FIG. 5 (represented by a two-dot chain line). In FIG. 5, when a vibration in the right direction occurs, the synthetic gravity center g1 moves on a concentric circle C4 centering on the point P and the synthetic gravity center g2 is on a concentric circle C5 centering on the point P in the process of rotation (pendulum) motion. To move. In the process of this rotational (pendulum) movement, the combined center of gravity g1 receives a combined acceleration c obtained by combining the horizontal seismic acceleration h and the gravitational acceleration v, and the combined center of gravity g2 also receives the horizontal seismic acceleration h and the gravitational acceleration. A combined acceleration c is combined with v. The direction of the combined acceleration c received by the combined center of gravity g1 and the combined center of gravity g2 is a direction perpendicular to the mounting surface 3c of the mounting table 3. Therefore, according to the seismic isolation device 1 of the present embodiment, it is not necessary to strictly limit the position of the object O on the mounting table 3 during the mounting work, and experience a large amplitude roll due to the earthquake. Even if the object O on the mounting table 3 is not easily displaced, an excellent seismic isolation effect is exhibited.

  As described above, the seismic isolation suitably used for preventing an object having a rectangular shape in plan view and having a long side facing the wall of the building from falling in a direction away from the wall. Although the apparatus 1 was demonstrated, the deformation | transformation to the seismic isolation apparatus which prevents both the fall to the direction away from the wall of a target object and the direction to approach a wall is easy. FIG. 6 shows this modification. (A) shows the lower surface 3d side of the mounting table 3, and (b) shows the upper surface 2c side of the base 2. In the above-described seismic isolation device 1, the mounting table side component of the roll isolation system 4 by the upper holding body 41, the upper roller 42, the upper support 47 and the upper guide 48 disposed on the lower surface 3 d of the mounting table 3. 4-U is configured, and the roll-type seismic isolation mechanism 4 is arranged by the lower holding body 45, the lower roller 46, the lower support body 43, and the lower guide 44 arranged on the upper surface 2 c of the base 2. The base-side component 4-L is configured, and the roll-based seismic isolation mechanism 4 is configured by vertically arranging the mounting table-side component 4-U and the base-side component 4-L. However, in the modification, the structural portion 4-UR having a structure in which the mounting table side component 4-U is rotated by 180 ° with respect to a line perpendicular to the lower surface 3d of the mounting table 3 is mounted on the lower surface 3d of the mounting table 3. It is arranged at a position adjacent to the base side component 4-U, and the base side component The structural portion 4-LR having a structure in which 4-L is rotated by 180 ° with respect to a line perpendicular to the upper surface 2c of the base 2 is disposed at a position adjacent to the base-side component portion 4-L of the upper surface 2c of the base 2 Has been. By placing the mounting table side component 4-U and the base component component 4-L, and the mounting table component 4-UR and the base component 4-LR in a vertically stacked manner, The seismic isolation device capable of preventing both the fall in the direction away from the wall and the fall in the direction approaching the wall can be formed extremely compactly.

(2) Bidirectional seismic isolation device Next, the mounting table on which the object is mounted can be moved with respect to the base in one direction (X direction) in the horizontal plane and in a direction perpendicular thereto (Y direction). A seismic isolation device according to a second embodiment of the present invention having a simple roll isolation system will be described with reference to FIGS. The seismic isolation device of the second embodiment also has a relatively simple configuration, and can be manufactured in a small size at low cost.

  Drawing 7 is a schematic diagram in the neutral position of seismic isolation device 100 of a 2nd embodiment, (a) shows a front view and (b) shows a side view. The seismic isolation device 100 includes a base 110 made of a substantially square flat plate disposed on the floor F of the building, an intermediate base 120 made of a substantially square frame, and a mounting having substantially the same shape as the base 110. It has a three-layer structure with the mounting table 130.

  On the upper surface 110 c side of the base 110 made of a substantially square flat plate, a pair of first support members 141 arranged in parallel with one side 110 a of the square and extending upward are perpendicular to the base 110. And provided symmetrically with respect to a plane passing through the midpoint of the other opposite side 110b, and at the leading edge of each first support 141, there are first rollers 144a, A first guide 142 for traveling 144b and a first barrier 141e for preventing the first rollers 144a and 144b from falling off from the first guide 142 are provided. On the lower surface 130d side of the mounting table 130 made of a substantially square flat plate, a pair of second supports that are arranged in parallel with the opposite side 130b of the base 110 that is orthogonal to the opposite side 110a and extend downward. 151 are provided symmetrically with respect to a plane perpendicular to the mounting table 130 and passing through the midpoint of the other opposite side 130a. A second guide 152 for running the second rollers 154a and 154b provided on the table 120 and a second barrier 151e for preventing the second rollers 154a and 154b from falling off from the second guide 152 are provided. ing.

  A first holding body 143a, 143b extending downward is provided on each of the opposite sides 120a of the intermediate platform 120 formed of a substantially square frame with respect to a plane perpendicular to the other opposite side 120b and passing through the midpoint thereof. Each of the other opposite sides 120b is provided with second holding bodies 153a and 153b extending upward symmetrically with respect to a plane perpendicular to the other opposite side 120a and passing through its midpoint. Is provided. First rollers 144a and 144b that are rotatable in the extending direction of the side 120a are provided at the tips of the first holding bodies 143a and 143b, and the extending directions of the side 120b are provided at the tips of the second holding bodies 153a and 153b. Second rollers 154a and 154b that are rotatable are provided. The intermediate table 120 is configured so that the first rollers 144 a and 144 b are in contact with the first guide 142, and the second rollers 154 a and 154 b are in contact with the second guide 152. Arranged between. Each of the pair of intermediate base roll isolation mechanisms 140 that reciprocate the intermediate base 120 in a predetermined direction (X direction) with respect to the base 110 when a vibration is generated includes a first support 141, a first guide 142, It is composed of two first rollers 144a and 144b that are in contact with one guide 142 and first holding bodies 143a and 143b that support them, and the mounting table 130 is intermediate to the intermediate table 120 when a vibration occurs. Each of the pair of mounting table roll isolation mechanisms 150 that reciprocate in the direction (Y direction) perpendicular to the reciprocation direction (X direction) of the intermediate platform 120 in the table roll isolation system 140 is a second support 151. And the second guide 152, two second rollers 154a and 154b that are in contact with the second guide 152, and second holding bodies 153a and 153b that support them.

  FIG. 8 is a schematic diagram for explaining the transfer of the intermediate platform 120 to the base 110 by the intermediate platform roll isolation mechanism 140 of the seismic isolation device 100. However, in FIG. 8, the first barrier 1411e is omitted for easy understanding. FIG. 8A is a diagram illustrating a neutral position of the base 110 and the intermediate base 120 in the seismic isolation device 100 corresponding to FIG. In the neutral position, the first guide 142 includes horizontal portions 142a and 142b that extend horizontally, and a curved portion 142c that extends upward while curving from one end of the horizontal portion 142a toward the end portion of the first support 141. A curved portion 142d extending downward from the other end of the horizontal portion 142a toward the center of the first support 141, and a curve from one end of the horizontal portion 142b toward the end of the first support 141. The curved portion 142e extends upward, and the curved portion 142f extends downward while bending toward the center of the first support 141 from the other end of the horizontal portion 142b. The lengths of the horizontal portions 142a and 142b of the first guide 142 are set such that the first roller 144b is in contact with the horizontal portion 142b when the first roller 144a is in contact with the horizontal portion 142a, and the curved portion 142c. And 142f are set such that the first roller 144b is in contact with the curved portion 142f when the first roller 144a is in contact with the curved portion 142c, and the lengths of the curved portions 142d and 142e are It is set so that the first roller 144b is in contact with the bending portion 142e when the one roller 144a is in contact with the bending portion 142d. In the seismic isolation device 100 of the present embodiment, the horizontal transfer portion of the intermediate platform roll isolation mechanism 140 includes the horizontal portions 142a and 142b of the first guide 142 and the first rollers 144a that travel on the horizontal portions 142a and 142b. 144b. In addition, the rotation transfer unit of the intermediate base roll seismic isolation mechanism 140 includes a combination of the curved portions 142c and 142f of the first guide 142 and the first rollers 144a and 144b traveling through the curved portions 142c and 142f, and the first A combination of curved portions 142d and 142e of the guide 142 and first rollers 144a and 144b that travel along the curved portions 142d and 142e.

  FIG. 8B shows a state in which the intermediate platform 120 is moved to the intermediate platform horizontal limit position with respect to the base 110 by the horizontal transfer portion of the intermediate platform roll isolation mechanism 140. The intermediate platform horizontal limit position means a limit position at which the intermediate platform 120 can move horizontally with respect to the base 110. Specifically, as shown in the left diagram of FIG. The roller 144a is in contact with the connection position between the horizontal portion 142a and the bending portion 142d of the first guide 142, and the first roller 144b is in contact with the connection position between the horizontal portion 142b of the first guide 142 and the bending portion 142e. The first roller 144a is in contact with the connecting position of the horizontal portion 142a and the curved portion 142c of the first guide 142, as shown in the right side of FIG. 8B, and The first roller 144b means a position in contact with the connection position of the horizontal portion 142b and the curved portion 142f of the first guide 142. The connection position between the horizontal portion 142a of the first guide 142 and the bending portion 142c or 142d and the connection position between the horizontal portion 142b of the first guide 142 and the bending portion 142e or 142f are determined when the first rollers 144a and 144b pass. Chamfering is preferable so as to reduce the impact. FIG. 9 is a diagram corresponding to FIG. 8B, but in the seismic isolation device 100 of the present embodiment, the intermediate platform 120 is an intermediate corresponding to the left diagram of FIG. When the stage horizontal limit position (in FIG. 9, the intermediate stage at this position is indicated by a solid line), the curved portions 142d and 142e of the first guide 142 are connected at the midpoint of the straight line connecting the centers of the first rollers 144a and 144b. 8 is formed so as to form a part of a circle C1 centered on a point P1 on the vertical line L1 passing through the intermediate base 120, and the intermediate base 120 corresponds to the right side of FIG. When the stage horizontal limit position (in FIG. 9, the intermediate stage 120 at this position is indicated by a one-dot chain line), the curved portions 142c and 142f of the first guide 142 are straight lines connecting the centers of the first rollers 144a and 144b. Centered on a point P2 on the vertical line L2 passing through the middle point And it is configured so as to form a part of the circle C2 was. Therefore, the tangent line of the concentric circle C3 centered on the point P1 and the tangent line of the concentric circle C4 centered on the point P2 pass through the surface formed by each side of the intermediate platform 120. Note that the heights of the points P1 and P2 are higher than the combined position of the center of gravity of the mounting table 130 and the center of gravity of the object on the mounting table 130, but in the seismic isolation device 100 of the present embodiment, the height is assumed. The positions of the points P1 and P2 are set in advance in consideration of various objects to be processed. When the position of the center of gravity of the object is extremely high, the radii of the circle C1 and the circle C2 become extremely large, and thus the arcs of the curved portions 142c, 142d, 142e, 142f of the first guide 142 are substantially approximated by straight lines. It will be.

  FIG. 8C shows a state in which the intermediate platform 120 is rotated by the rotation transfer unit of the intermediate platform roll isolation mechanism 140. 8C, the first roller 144a is guided by the curved portion 142d of the first guide 142, and the first roller 144b is guided by the curved portion 142e of the first guide 142 to rotate (pendulum). The right side of FIG. 8C shows the state where the first roller 144a is guided by the curved portion 142c of the first guide 142, and the first roller 144b is the curved portion of the first guide 142. A state in which rotation (pendulum) movement is guided by 142f is shown. FIG. 10 is a diagram corresponding to FIG. In the seismic isolation device 100 according to the present embodiment, when the intermediate platform 120 reaches the intermediate platform horizontal limit position corresponding to the left diagram of FIG. 142d and 142e are configured to form a part of the circle C1 centered on the point P1, so that the intermediate stage 120 is rotated so as to correspond to the left side of FIG. 8C. (In FIG. 10, the intermediate stage 120 at this position is indicated by a solid line.) Is rotated so that the tangent line of the concentric circle C3 centered on the point P1 passes through the plane formed by each side of the intermediate stage 120. Therefore, the reciprocation of the rotational motion of the intermediate platform 120 by the rotational transfer unit of the intermediate platform roll isolation mechanism 140 is an accurate pendulum motion. Further, in the seismic isolation device 100 of the present embodiment, when the intermediate platform 120 reaches the intermediate platform horizontal limit position corresponding to the right diagram of FIG. Since the curved portions 142c and 142f are configured to form a part of the circle C2 with the point P2 as the center, the intermediate stage 120 is rotated so as to correspond to the right side of FIG. 8C. (In FIG. 10, the intermediate platform at this position is indicated by a one-dot chain line.) The rotational movement is such that the tangent of the concentric circle C4 centered on the point P2 passes through the plane formed by each side of the intermediate platform 120. Be made. Therefore, the reciprocation of the rotational motion of the intermediate platform 120 by the rotational transfer unit of the intermediate platform roll isolation mechanism 140 is also an accurate pendulum motion.

  Next, operation | movement of the intermediate | middle stand 120 with respect to the base 110 in the seismic isolation apparatus 100 of this Embodiment is demonstrated. As shown in FIG. 8A, when no vibration is generated, or when only a weak vibration that does not move the mounting table 130 on which the object is placed is generated even when the vibration is generated. In addition, the intermediate stand 120 exists at a position overlapping the base 110. When an earthquake occurs and the base 110 moves to the left in FIG. 8, the first roller 144 a travels on the horizontal portion 142 a of the first guide 142 of the intermediate base roll-isolating mechanism 140 due to the inertial force applied by the intermediate base 120. Then, the first roller 144b travels on the horizontal portion 142b of the first guide 142, and the intermediate platform 120 is moved horizontally while maintaining the level with respect to the base 110. Although the horizontal movement distance of the intermediate platform 120 with respect to the base 110 depends on the intensity of the earthquake, it can move horizontally until reaching the horizontal limit position shown on the left side of FIG. When the base 110 at the horizontal limit position shown on the left side of FIG. 8B further moves to the left side of FIG. 8 by the distance x, the curved portion 142d of the first guide 142 of the intermediate base roll isolation mechanism 140 is moved to the first side. The roller 144a travels, the first roller 144b travels along the curved portion 142e of the first guide 142, and the intermediate platform 120 is rotated about the point P1 (see FIG. 10), and the earthquake acceleration energy corresponding to the distance x. Is absorbed by the rotational motion.

  Further, when the base 110 in the neutral position moves to the right in FIG. 8, the first roller 144 a causes the horizontal portion 142 a of the first guide 142 of the intermediate base roll isolation mechanism 140 to move due to the inertial force applied by the intermediate base 120. The first roller 144b travels on the horizontal portion 142b of the first guide 142, and the intermediate platform 120 is moved horizontally while maintaining the level with respect to the base 110. Although the horizontal movement distance of the intermediate platform 120 with respect to the base 110 depends on the intensity of the earthquake, it can move horizontally until reaching the horizontal limit position shown on the right side of FIG. When the base 110 at the horizontal limit position shown on the right side of FIG. 8B further moves to the right side of FIG. 8 by the distance x, the curved portion 142c of the first guide 142 of the intermediate base roll isolation mechanism 140 is moved to the first position. The roller 144a travels, the first roller 144b travels along the curved portion 142f of the first guide 142, and the intermediate platform 120 is rotated about the point P2 (see FIG. 10), and the earthquake acceleration energy corresponding to the distance x Is absorbed by the rotational motion. Therefore, according to the occurrence state of the earthquake, the intermediate stand 120 of the seismic isolation device 100 is in the state shown in the right side of FIG. 8C and the state shown in the left side of FIG. Reciprocate between. When the earthquake stops, the first roller 144a contacts the horizontal portion 142a of the first guide 142 and the first roller 144b contacts the horizontal portion 142b of the first guide 142 due to gravity acting on the object or the like. The intermediate stage 120 stops at a position, that is, a position where a surface formed by each side of the intermediate stage 120 is kept horizontal.

  FIG. 11 is a schematic diagram for explaining the transfer of the mounting table 130 to the intermediate table 120 by the mounting table roll isolation mechanism 150 of the seismic isolation device 100. However, in FIG. 11, the second barrier 151e is omitted for easy understanding. FIG. 11A is a diagram illustrating neutral positions of the intermediate table 120 and the mounting table 130 in the seismic isolation device 100 corresponding to FIG. In the neutral position, the second guide 152 has horizontal portions 152a and 152b extending horizontally, and a curved portion 152c extending upward while curving from one end of the horizontal portion 152a toward the end portion of the second support 151. A curved portion 152d extending downward from the other end of the horizontal portion 152a toward the center of the second support 151, and a curve from one end of the horizontal portion 152b toward the end of the second support 151. The curved portion 152e extends upward, and the curved portion 152f extends downward while bending toward the center of the second support 151 from the other end of the horizontal portion 152b. The lengths of the horizontal portions 152a and 152b of the second guide 152 are set so that the second roller 154b is in contact with the horizontal portion 152b when the second roller 154a is in contact with the horizontal portion 152a, and the curved portion 152c. And 152f are set such that when the second roller 154a is in contact with the curved portion 152c, the second roller 154b is in contact with the curved portion 152f, and the lengths of the curved portions 152d and 152e are The second roller 154b is set to be in contact with the bending portion 152e when the two rollers 154a are in contact with the bending portion 152d. In the seismic isolation device 100 of the present embodiment, the horizontal transfer unit of the mounting base roll seismic isolation mechanism 150 includes the horizontal parts 152a and 152b of the second guide 152 and the second rollers 154a and 152b running on the horizontal parts 152a and 152b. 154b. In addition, the rotation transfer unit of the mounting table roll seismic isolation mechanism 150 includes a combination of the curved portions 152c and 152f of the second guide 152 and the second rollers 154a and 154b that travel on the curved portions 152c and 152f, and the second A combination of curved portions 152d and 152e of the guide 152 and second rollers 154a and 154b running on the curved portions 152d and 152e.

  FIG. 11B shows a state in which the mounting table 130 has been moved to the mounting table horizontal limit position with respect to the intermediate table 120 by the horizontal transfer unit of the mounting table roll vibration isolation mechanism 150. The mounting table horizontal limit position means a limit position at which the mounting table 130 can move horizontally with respect to the intermediate table 120. Specifically, as shown in the left diagram of FIG. The roller 154a is in contact with the connection position of the horizontal portion 152a and the bending portion 152c of the second guide 152, and the second roller 154b is in contact with the connection position of the horizontal portion 152b of the second guide 152 and the bending portion 152f. And the second roller 154a is in contact with the connecting position of the horizontal portion 152a of the second guide 152 and the curved portion 152d, as shown in the right side of FIG. 11B, and This means a position where the second roller 154b is in contact with the connection position between the horizontal portion 152b of the second guide 152 and the bending portion 152e. The connection position between the horizontal portion 152a of the second guide 152 and the bending portion 152c or 152d, and the connection position between the horizontal portion 152b of the second guide 152 and the bending portion 152e or 152f are determined when the second rollers 154a and 154b pass. Chamfering is preferable so as to reduce the impact. FIG. 12 is a diagram corresponding to FIG. 11B, but in the seismic isolation device 100 of the present embodiment, the intermediate platform 120 is mounted on the base 110 corresponding to the left diagram of FIG. When the stage horizontal limit position is reached (in FIG. 12, the intermediate stage 120 at this position is indicated by a solid line), the curved portions 152c and 152e of the second guide 152 pass vertically through the center of the base end of the second support 151. It is configured to form a part of a circle C5 centered on the point P3 on the line L3, and the curved portions 152d and 152f of the second guide 152 form a part of the circle C6 centered on the point P3. It is configured. The circle C5 and the circle C6 are concentric circles. Therefore, the tangent line of the concentric circle C7 with the point P3 as the center passes through the mounting surface 130c of the mounting table 130. Even when the mounting table 130 reaches the mounting table horizontal limit position corresponding to the right side of FIG. 11B with respect to the intermediate table 120 (in FIG. 12, the intermediate table 120 at this position is indicated by a one-dot chain line) The same is true except that the relative position of the intermediate table 120 with respect to the mounting table 130 changes. In addition, although the height of the point P3 exists in the position higher than the synthetic | combination position of the gravity center of the mounting base 130 and the gravity center of the target object on the mounting base 130, in the seismic isolation apparatus 100 of this Embodiment, it is assumed. The position of the point P3 is set in advance in consideration of various objects. When the position of the center of gravity of the object is extremely high, the radii of the circle C5 and the circle C6 become extremely large, so that the arcs of the curved portions 152c, 152d, 152e, and 152f of the second guide 152 are substantially approximated by straight lines. It will be.

  FIG. 11 (c) shows a state in which the mounting table 130 is rotated by the rotation transfer unit of the mounting table roll isolation mechanism 150. 11C, the second roller 154a is guided by the curved portion 152c of the second guide 152, and the second roller 154b is guided by the curved portion 152f of the second guide 154 to rotate (pendulum). FIG. 11C shows a state in which the second roller 154a is guided by the curved portion 152d of the second guide 152, and the second roller 154b is the curved portion of the second guide 154. It shows a state in which it is guided by 152e to be rotated (pendulum). FIG. 13 is a diagram corresponding to FIG. In the seismic isolation device 100 according to the present embodiment, when the mounting table 130 reaches the mounting table horizontal limit position corresponding to the left diagram of FIG. 152c and 152e are configured to form part of the circle C5 centered on the point P3, and the curved portions 152d and 152f of the second guide 152 form part of the circle C6 centered on the point P3. Therefore, when the mounting table 130 is rotated so as to correspond to the left side of FIG. 11C (in FIG. 13, the intermediate table 120 and the mounting table 130 at this position are indicated by solid lines). Is rotated so that the tangent line of the concentric circle C7 about the point P3 passes through the mounting surface 130c of the mounting table 130. Therefore, the reciprocation of the rotational movement of the mounting table 130 by the rotation transfer unit of the mounting table roll-proofing mechanism 150 is an accurate pendulum movement. Further, in the seismic isolation device 100 according to the present embodiment, when the mounting table 130 reaches the mounting table horizontal limit position corresponding to the right diagram of FIG. The curved portions 152c and 152e are configured to form part of a circle C5 centered on the point P3, and the curved portions 152d and 152f of the second guide 152 are part of the circle C6 centered on the point P3. Therefore, when the mounting table 130 is rotated so as to correspond to the drawing on the right side of FIG. 11C (in FIG. 13, the intermediate table 120 and the mounting table 130 at this position are moved. (Shown by an alternate long and short dash line) is rotated so that the tangent of the concentric circle C7 centered on the point P3 passes through the mounting surface 130c of the mounting table 130. Therefore, the reciprocation of the rotational movement of the mounting table 30 by the rotation transfer unit of the mounting table roll-isolating mechanism 150 is also an accurate pendulum movement.

  Next, operation | movement of the mounting base 130 with respect to the intermediate | middle stand 120 in the seismic isolation apparatus 100 of this Embodiment is demonstrated. As shown in FIG. 11 (a), when there is no vibration at all, or when there is only a weak vibration that does not move the mounting table 130 on which the object is placed even if the vibration is generated. In addition, the mounting table 130 exists at a position overlapping the intermediate table 120, and the mounting surface 3c is maintained horizontally. Therefore, when the object is placed on the mounting table 130, the mounting table 130 does not tilt, and no special attention is required for the mounting operation. When an earthquake occurs and the intermediate platform 120 moves to the left side of FIG. 11, the second roller 154 a travels on the horizontal portion 152 a of the second guide 152 of the mounting table roll-off seismic isolation mechanism 150 due to the inertial force applied by the mounting table 130. Then, the second roller 154 b travels on the horizontal portion 152 b of the second guide 152, and the mounting table 130 is moved horizontally while maintaining the level with respect to the intermediate table 120. Although the horizontal movement distance of the mounting table 130 with respect to the intermediate table 120 depends on the intensity of the earthquake, the horizontal movement is possible until the horizontal limit position shown on the left side of FIG. When the intermediate stage 120 at the horizontal limit position shown on the left side of FIG. 11B further moves to the left side of FIG. 11 by the distance x, the curved portion 152c of the second guide 152 of the mounting table roll-proof mechanism 150 is moved to the second position. The roller 154a travels, the second roller 154b travels through the curved portion 152f of the second guide 152, and the mounting table 130 is rotated about the point P3 (see FIG. 13), and the earthquake acceleration energy corresponding to the distance x Is absorbed by the rotational motion.

  Further, when the intermediate platform 120 in the neutral position moves to the right side of FIG. 11, the second roller 154a causes the horizontal portion 152a of the second guide 152 of the intermediate platform roll isolation mechanism 150 to move due to the inertial force applied by the mounting table 130. The second roller 154b travels on the horizontal portion 152b of the second guide 152, and the mounting table 130 is moved horizontally while maintaining the level with respect to the intermediate table 120. Although the horizontal movement distance of the mounting table 130 with respect to the intermediate table 120 depends on the intensity of the earthquake, the horizontal movement is possible until the horizontal limit position shown on the right side of FIG. When the intermediate platform 120 at the horizontal limit position shown on the right side of FIG. 11B further moves to the right side of FIG. 11 by the distance x, the curved portion 152d of the second guide 152 of the mounting table roll-proof mechanism 150 is moved to the second position. The roller 154a travels, the second roller 154b travels along the curved portion 152e of the second guide 152, and the mounting table 130 is rotated about the point P3 (see FIG. 13), and the earthquake acceleration energy corresponding to the distance x Is absorbed by the rotational motion. Therefore, depending on the state of occurrence of the earthquake, the mounting table 130 of the seismic isolation device 100 reciprocates between the state shown in the right diagram of FIG. 11C and the state shown in the left diagram with respect to the intermediate table 120. . When the earthquake stops, the second roller 154a contacts the horizontal portion 152a of the second guide 152 and the second roller 154b contacts the horizontal portion 152b of the second guide 152 due to gravity acting on the object or the like. The mounting table 130 stops at the position, that is, the position where the mounting surface 130c of the mounting table 130 is kept horizontal.

  FIG. 14 is a diagram showing the rotation (pendulum) movement of the mounting table 130 when the object O is mounted on the mounting table 130. (A) shows the rotation of the mounting table 130 due to the rotation (pendulum) movement of the intermediate table 120 with respect to the base 110, and (b) shows the rotation (pendulum) movement of the mounting table 130 with respect to the intermediate table 120. In FIG. 14, the combined position of the center of gravity of the object O and the center of gravity of the mounting table 3 is indicated by g. Along with the rotation (pendulum) movement of the intermediate stage 120 relative to the base 110, the combined center of gravity g moves on a concentric circle C8 about the point P1, and the rotation is accompanied by a rotation (pendulum) movement of the mounting table 130 relative to the intermediate stage 120. The center of gravity g moves on a concentric circle C9 centered on the point P3. In the process of this rotation (pendulum) movement, the combined center of gravity g receives a combined acceleration c obtained by combining the horizontal earthquake acceleration h and the gravitational acceleration v. The direction of the combined acceleration c is a direction perpendicular to the mounting surface 130c of the mounting table 130. Therefore, according to the seismic isolation device 100 of the present embodiment, it is not necessary to strictly limit the position of the object O on the mounting table 130 during the mounting operation, and experience a large amplitude roll due to the earthquake. Even if the object O on the mounting table 130 is not easily displaced, an excellent seismic isolation effect is exhibited.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment, The change in the range which does not deviate from the meaning of this invention is possible. For example, instead of the configuration of the roll isolation mechanism in the first embodiment, the one-way isolation is adopted even if the configuration of the intermediate base roll isolation mechanism or the configuration of the mounting table roll isolation mechanism in the second embodiment is adopted. The apparatus can be configured, and instead of the configuration of the intermediate base roll isolation mechanism in the second embodiment, the configuration of the roll isolation mechanism of the modified form shown in FIG. Instead of the configuration of the vibration isolation system, a configuration of the lateral vibration isolation mechanism having a modification shown in FIG. 6 may be adopted. In the seismic isolation device of the first embodiment, two roll isolation mechanisms are provided, and in the seismic isolation device of the second embodiment, two mounting base roll isolation mechanisms and two intermediate roll isolation mechanisms are provided. However, the number can be increased or decreased depending on the required strength, and two rolls are used for one roll isolation mechanism, but depending on the required strength. You can increase the number. Further, the shape of the roller and the guide for running the roller is not limited to the shape described in the seismic isolation device of the first embodiment and the seismic isolation device of the second embodiment, and has, for example, a collar portion such as a railway wheel. If a roller with a hook is used, a barrier for preventing the roller from falling off along the guide is unnecessary. In addition, the seismic isolation device may be arranged not only on the floor surface in the building but also on the ground, for example, to construct a building on the mounting table. Furthermore, the shapes of the base, the intermediate platform, and the mounting table are not limited to the shapes described in the seismic isolation device of the first embodiment and the seismic isolation device of the second embodiment, and are appropriately changed according to the object to be protected. be able to. For example, a pair of horizontal columnar support members are arranged for each shelf plate on the inner surface of the side plate of a storage shelf such as a cupboard, and this support member is used as a base in the seismic isolation device of the first embodiment. Thus, it is possible to configure a seismic isolation device for each shelf board. According to this configuration, even when the storage shelf itself is fixed to the building structure, it is possible to prevent articles loaded on the shelf board from falling down due to vibration.

  The seismic isolation device of the present invention can be suitably used not only for expensive objects but also for protecting various objects from damage caused by vibrations such as earthquakes.

1,100 Base isolation device 2,110 Base 120 Intermediate base 3,130 Mounting base 4 Rolling base isolation mechanism 140 Intermediate base rolling base isolation mechanism 150 Mounting base lateral isolation system

Claims (2)

A mounting table on which objects to be protected from vibration damage are placed;
A base disposed below the mounting table;
A roll seismic isolation mechanism that is arranged between the base and the mounting table and reciprocates the mounting table in a predetermined direction with respect to the base when a vibration occurs.
A seismic isolation device comprising:
The rolling seismic isolation mechanism is
A horizontal transfer unit capable of horizontally moving the mounting table in a neutral position with respect to the base to reach a horizontal limit position;
The mounting table transferred to the horizontal limit position by the horizontal transfer unit from the neutral position centered on a point that is higher than the combined position of the center of gravity of the mounting table and the center of gravity of the object on the mounting table. A rotary transfer section capable of rotating in a direction away from the
A seismic isolation device characterized by comprising: A mounting table on which objects to be protected from vibration damage are placed;
A base disposed below the mounting table;
An intermediate base disposed between the base and the mounting base;
An intermediate base roll isolation mechanism that is disposed between the base and the intermediate base and reciprocates the intermediate base in a predetermined direction with respect to the base when a vibration occurs;
The intermediate table is disposed between the intermediate table and the mounting table, and reciprocates in the direction perpendicular to the reciprocating direction of the intermediate table in the intermediate table roll-off seismic isolation mechanism with respect to the intermediate table when a vibration occurs. Mounting base roll isolation mechanism,
A seismic isolation device comprising:
The base roll seismic isolation mechanism described above is
A mounting table horizontal transfer unit capable of horizontally moving the mounting table in the neutral position with respect to the intermediate table to reach the mounting table horizontal limit position;
The mounting table that has been transferred to the mounting table horizontal limit position by the mounting table horizontal transfer unit is centered on a point that is higher than the combined position of the center of gravity of the mounting table and the center of gravity of the object on the mounting table. A mounting table rotation transfer unit capable of rotating in a direction away from the neutral position of the mounting table;
Have
The intermediate platform roll isolation mechanism is
An intermediate platform horizontal transfer unit capable of horizontally moving the intermediate platform in a neutral position with respect to the base to reach an intermediate platform horizontal limit position;
The intermediate platform transferred to the intermediate platform horizontal limit position by the intermediate body horizontal transfer unit is centered on another point that is higher than the combined position of the center of gravity of the mounting table and the center of gravity of the object on the mounting table. An intermediate stage rotation transfer unit capable of rotating in a direction away from the neutral position of the intermediate stage,
A seismic isolation device characterized by comprising:

Images