JP2005054869A - Base isolating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a strong, low-cost and reliable base isolating device of simple structure smooth to move in the horizontal direction and return to the origin and possible to be formed into a long size. <P>SOLUTION: This base isolating device is formed of supports 4 respectively formed of an upper and a lower plates 1 and 2 formed with recessed surfaces 1a and 2a and a ball 3, an upper and a lower plates 5 and 6, and a guide mechanism 7 for guiding the upper plate in the horizontal direction in relation to the lower plate 7. The guide mechanism is formed of guide rods 8 crossing each other and a guide 10 for holding freely to move in the axial direction, and provided between the upper and the lower plates not to be interfered with any of the upper and the lower plates in a plane view. The guide mechanism is arranged in a cross-shape space 14 formed between the supports, and the guide (guide rod) is fixed to the plate, and fitted through the cross-shape guide rod 8 (guide 11) freely to move in the horizontal direction and move a little in the vertical direction. Or, the guide 10 of the guide rod 9 can be arranged outside the support to surround the support 4, and fixed in a rectangular form. A ball holder 12 which does not interfere with the guide mechanism is provided. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a structure for horizontal sliding of a seismic isolation device in which the concave surfaces of two plates are arranged one above the other through a ball, and the ball moves horizontally and has a function of returning to the origin by the concave plate surface.

  Conventional seismic isolation devices, for example, in Patent Document 1, change the posture of an upper plate in a plan view with respect to a lower plate by a guide that is connected to intersect with each other and a guide rail that slides along the guide. It can be moved horizontally without any trouble. Furthermore, by making the longitudinal direction of the vertical sliding surface of the guided rail concave, the seismic isolation device has a function of returning to the origin, and a sliding contact pad is provided on the horizontal sliding surface of the guide rail so that the guide It also has a damping function by frictional force acting between the rails.

  However, although the structure of Patent Document 1 is simple, when a plurality of guides are arranged in the apparatus, if the directions of the arranged guides do not completely match, the sliding resistance of the guide becomes excessive, and the apparatus There was a problem that the smoothness of the movement of the machine became worse. Furthermore, since the load in the horizontal direction and the vertical load are received at the same time, the strength is required and the bearing performance on the sliding surface is high. Further, there is a possibility that the sliding resistance may be larger than that of the rolling bearing and the smooth movement cannot be performed. In addition, there is a problem that the sliding contact pad mounted on the guide is unevenly worn and the damping performance is lowered. On the other hand, in order to completely match the directions of the guides arranged, it is necessary to increase the processing accuracy of the guides themselves and to increase the mounting accuracy of the guides, which increases the cost. It was.

On the other hand, Patent Document 2 discloses a seismic isolation device in which a plurality of four or more sets of support bodies including an upper plate, a lower plate, and a ball are arranged and provided with a rolling bearing and a guide. This is provided with a plurality of support bodies of four or more sets, and a holder for holding the balls of each support body so as to move together, and an upper plate, a lower plate and a holder of the device in plan view. A guide mechanism that guides so as to be able to move in the horizontal direction without changing the posture is provided integrally, and can be moved in the horizontal direction by the cage and the guide mechanism. The support body itself of this apparatus has an origin return function, and the guide is provided with resistance means for making it difficult to move, so that the apparatus has a damping function.
Japanese Patent Laid-Open No. 11-190390 JP 2000-240721 A

  However, in the thing of patent document 2, since the holder | retainer and the guide mechanism were integrated, the guide mechanism was complicated, and there existed a problem that the cost of component processing and an assembly became high. In addition, since the upper and lower plates of the ball held by the cage are covered with the upper and lower pans, the vertical dimension of the cage is limited in order to prevent interference between the cage and the upper and lower pans. Therefore, the strength of the cage and the guide mechanism is low, and parts of the guide mechanism are easily damaged by a sudden movement of the apparatus, and the reliability of the apparatus is low. Furthermore, there is a problem that the ball center position of the cage and the center position of the support body must be matched, and the positional accuracy of the support body and the guide of the guide mechanism must be ensured. In addition, in order to secure the strength of the cage, if the size is secured by making the plate on one side flat, there is no function of returning the origin on the flat side, and thus there is a problem such as vertical displacement. Moreover, in the case of seismic isolation of a long thing, a cage and a guide mechanism must be lengthened, and it becomes large and the structure is complicated. Furthermore, in the case of a long length, it is necessary to arrange a plurality of four sets of support bodies and guide mechanisms as one set (FIG. 17 of Patent Document 2), which is a large scale.

  In view of the above-mentioned problems, the object of the present invention is to use a support body provided with a ball between concave upper and lower dishes, to smoothly move in the horizontal direction and return to the origin, have a simple structure, and have high strength. The object is to provide a seismic isolation device that can be easily secured, low in cost, and high in reliability. Furthermore, it is providing the seismic isolation apparatus which can be used also for a long length.

  As a result of researches on the necessity of a cage for holding the balls between the support bodies, the inventors of the present invention may cause the ball positions to deviate from each other or come off the pan if only the horizontal movement of the upper and lower plates is restricted. Otherwise, even if there was no retainer, if both the upper and lower surfaces were concave, the automatic origin return function determined that the ball position was almost determined by the relative position of the upper and lower plates and did not change significantly. That is, it is not necessary to use a guide mechanism integrated with the cage as in Patent Document 2. According to this knowledge, in the present invention, an upper plate having a concave surface formed on the lower surface, a lower plate provided with a concave surface provided on the upper surface so as to face the concave surface of the upper plate, and the upper plate and the lower plate. A pair of one or more support bodies, each of which supports the upper plate with respect to the lower plate in a rotatable manner, an upper plate to which the upper plate of the support body is fixed, A seismic isolation device comprising: a lower plate to which the lower plate of the support body is fixed; and a guide mechanism that allows the upper plate to move in a horizontal direction without changing a posture in plan view with respect to the lower plate. The guide mechanism includes a guide rod orthogonal to each other and a guide that holds each of the orthogonal guide rods so as to be movable in the axial direction, and is provided between the upper and lower plates. And the guides are located on the upper and lower plates. It has solved the above problems by providing a seismic isolation device that is so as not to interfere even in a plan view even been.

  That is, the concave surfaces of the two plates are arranged one above the other through the balls, and the original return function is ensured uniquely, while the guide mechanism that allows the horizontal movement is provided by the guide rods orthogonal to each other. For example, guides that hold each of them in an axially movable manner are arranged in the space formed between the support bodies or outside the support bodies so that they do not interfere with both the upper plate and the lower plate even in plan view. Since it is provided between the upper and lower plates, the guide bar and the guide are not subject to the upper and lower plate size restrictions. Further, the support body is the same as the conventional one, and the guide mechanism has a simple structure of a guide bar and a guide.

  More specifically, in the invention according to claim 2, the support bodies are four or more sets, and the guide rod and the guide are disposed in a cross-shaped space formed between the support bodies, The guide comprises an upper guide fixed to the upper plate so that the guide surface is in one direction, and a lower guide fixed to the lower plate so that the guide surface is orthogonal to the guide surface of the upper plate. The guide rod has a cross shape, and orthogonal guide rods are fitted to the guides of the upper and lower plates so as to be movable in the axial direction and slightly movable in the vertical direction, respectively. As a result, the upper plate and the lower plate can move along the guide in a direction perpendicular to each other along the guide rod, so that the upper plate and the lower plate can move relative to each other in the horizontal direction. In addition, since it can be moved slightly in the vertical direction, it can follow the vertical movement of the support body and absorb the mounting error in the vertical direction. The span of the guide can be increased in accordance with the plate, so that it can be strengthened against the moment in the horizontal rotation direction by the guide rod.

  On the other hand, instead of the guide, a guide rod may be attached to the plate side and arranged so as to form a cross between the upper and lower plates. Therefore, in the invention according to claim 3, the support bodies are four or more sets, the guide bars and the guides are arranged in a cross-shaped space formed between the support bodies, and the guide bars are The upper plate and the lower plate are fixed so as to be orthogonal to each other, the guide has upper and lower guides, and the upper and lower guides are integrated so as to be orthogonal to each other. The guide rod is fitted so that it can move in the axial direction and can move slightly in the vertical direction. Thus, as described above, the upper plate and the lower plate can move relative to each other in the horizontal direction, follow up / down movement of the support body, and absorb mounting errors in the up / down direction. If only the shape of the guide mechanism is taken, it is the same shape as that shown in FIG. 1 of Patent Document 1, but it does not require strength because it is not subjected to a vertical load, and weight reduction and cost reduction are achieved. Further, since the guide rod is attached to the plate side, the bending strength of the plate can be increased. The guide can be strengthened against the moment in the horizontal rotation direction by the guide rod by extending in the longitudinal direction.

  When the above-mentioned guide rods are arranged in a cross shape or a relatively cross shape, the four support bodies are spaced apart from each other in a square shape to secure a cross-shaped space in the center, and in this space Place guide bars and guides to avoid interference with the upper and lower dishes. On the contrary, the interference with the upper and lower pans can be eliminated by arranging it outside the support body. Therefore, in the invention described in claim 4, the guide rod and the guide are arranged outside the support body so as to surround one or more of the support bodies, and the guide rod has four bars in a rectangular shape. The guide is fixed so that the guide surfaces are orthogonal to the upper plate and the lower plate according to the guide rods, and the guide rods forming the rectangle are the upper and lower guides. Each of the guides of the plate is fitted so as to be movable in the axial direction and finely movable in the vertical direction. Thus, as described above, the upper plate and the lower plate can move relative to each other in the horizontal direction, follow up / down movement of the support body, and absorb mounting errors in the up / down direction. Moreover, since it arrange | positions on the outer side of a support body, the space between support bodies can be eliminated or reduced, and even if there is one support body, a guide is possible. Furthermore, since the four bars are rectangular and each bar is guided, the guide bar has high rigidity and can be guided reliably.

  If a plurality of seismic isolation devices composed of one or a plurality of support bodies are arranged, even a long span device can be supported. A rectangular plate is used to place exhibits, furniture, and multiple equipment. In such a case, it is better to arrange a seismic isolation device composed of two sets of bearings rather than four single bearings. Therefore, in the invention according to claim 5, in the seismic isolation device according to claim 4, there are two sets of the support bodies, and the guide rod and the guide are arranged so as to surround the two sets of support bodies. It was set up as a set of seismic isolation members. Furthermore, in the invention described in claim 5, a plurality of seismic isolation members described in claim 5 are arranged. It goes without saying that a plurality of cross-shaped guide mechanisms and a large number of support bodies can be arranged depending on what is placed.

  The guide rod and the guide are preferably those that can be easily manufactured and assembled. Therefore, in the invention according to claim 7, the guide rod is fixed by overlapping square bars at right angles to each other, the guide has a substantially U-shaped cross section and the opening side is fixed to the upper or lower plate side, The seismic isolation according to claim 2, 4, 5, or 6, wherein a guide hole formed by the guide and the upper or lower plate is in sliding contact, and a gap is provided in a vertical direction between the guide hole and the square member. The device. Since the rod-shaped member is simply fixed by overlapping two or four rod-shaped members in a cross or a rectangle, it is easy to manufacture and assemble, and the square plate is inserted and slidably contacted with the guide hole. The lower plate and the lower plate are coupled in the vertical direction and do not fall apart during transportation or assembly.

  There may be no ball cage, but the relative position between the balls may be shifted due to water, dust or other factors. Accordingly, in the invention described in claim 8, there is provided a ball holder that has two or more support bodies, holds the ball, and does not interfere with the guide mechanism. It was set as the seismic isolation apparatus as described in any one of thru | or 7. The balls of each support body move together by the ball cage. A ball cage is provided between the supports. When the guide mechanism is arranged outside the support body, the cage is provided between the balls of the support body surrounded by the guide mechanism, so that the cage does not interfere with the guide mechanism. Conversely, in the case of a cross-shaped guide mechanism, the center of the cage is opened so as not to interfere with the guide. Thus, since the ball holder does not interfere with the guide mechanism and is independent of the guide mechanism, it is not necessary to determine the positional relationship between the guide mechanism and the holder with high accuracy. Further, there is no positional restriction as long as the positional relationship between the support body and the guide mechanism does not interfere. The pitch of the ball holding part of the ball cage and the support body should be matched as much as possible.

  As in the prior art, the guide mechanism is given a damping or resistance function by sliding and guiding the guide rod with a spring mounted on the guide and a sliding contact pad. Alternatively, it goes without saying that a ring-shaped stopper may be provided on the upper plate and the lower plate of the support body so as to prevent the balls of the support body from jumping out of the support body.

  In the present invention, the concave surfaces of the two plates are arranged one above the other through the ball, ensuring the origin return function, and holding the guide mechanism orthogonal to each other and each of the guide rods so as to be movable in the axial direction. The guides and guides do not interfere with both the upper and lower pans in plan view, and the guide bar and guide are not subject to the upper and lower pan dimensions, so the movement in the horizontal direction and return to origin is smooth. It became possible to provide a highly reliable seismic isolation device that can easily secure the strength. Further, since the support body is the same as the conventional one and the guide mechanism has a simple structure of a guide rod and a guide, the structure is simple, the cost is low, and the reliability is improved. In addition, there is no significant restriction on the positional relationship between the support body and the guide mechanism, and the position accuracy of the guide mechanism with respect to the support body is not required to be high, so that design, processing, and assembly are easy.

  In the second aspect of the invention, the guide is disposed on the plate side so that the guide and the guide rod are accommodated in the cross-shaped space between the support bodies, and the upper and lower plates are arranged with each other along the guide rod. Move in a perpendicular direction, move in a horizontal direction, allow a slight movement in the vertical direction, follow the vertical movement of the support body, absorb mounting errors in the vertical direction, and strengthen the moment in the horizontal rotation direction. Move more smoothly and increase reliability. In the invention according to claim 3, since the guide rod is attached to the plate side and the bending strength of the plate can be increased, the structure of the plate can be simplified and the attachment is easy.

  In the invention described in claim 4, since the guide rod and the guide are arranged outside the support body so as to surround the support body, and the space between the support bodies is eliminated or reduced, even one support body is horizontal. A moving mechanism can be constructed, and a plurality of seismic isolation members can be easily applied to various seismic isolation objects. In addition, the guide rod is rectangular and has high rigidity and can be guided reliably, so it is strong against external force. Further, since the guide is also arranged on the outside, adjustment and maintenance of the damping mechanism and the like are easy. Furthermore, in the inventions according to claims 5 and 6, since two sets of the support bodies are used as a single seismic isolation member, and a plurality of the seismic isolation members are arranged, it is used for a long seismic isolation object. The seismic isolation device can be supplied with a small number of types of seismic isolation members, making management easier.

  Further, in the invention described in claim 7, the rod-shaped member is simply fixed by overlapping two or four rod-shaped members in a cross or a rectangle, and is easy to manufacture and assemble. Since it is inserted and slidably contacted, the upper and lower plates are joined in the vertical direction, so that they do not fall apart during transportation or assembly, making handling easier.

  Furthermore, in the invention described in claim 8, since the balls of the support bodies are moved together by the ball holder, the reliability can be further improved.

  A first embodiment of the present invention will be described with reference to the drawings. 1 is a plan view excluding an upper plate, an upper plate, and an upper stopper of the seismic isolation device according to the first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. It is a BB line longitudinal cross-sectional view. FIG. 1 shows a state where the ball position is moved and the upper plate and the lower plate are relatively displaced, and FIGS. 2 and 3 are cross sections when the ball is in the original position in FIG. Further, substantially the same members or parts are denoted by the same reference numerals, and a part of the description is omitted. In the first embodiment, a cross-shaped guide mechanism is provided in a cross-shaped space between four support bodies. In each drawing, four support bodies 4 each including a ball 3 for supporting the upper plate 1 with respect to the lower plate 2 are disposed between the upper plate 1 and the lower plate 2 opposite to the upper plate 1 so as to be rotatable. Has been. The upper plate 1 of each support body 4 is fixed to the upper plate 5 and the lower plate 2 is fixed to the lower plate 6. When the upper plate 5 moves relative to the lower plate 6, each support body responds to the movement. The ball 3 also moves. The lower surface 1a of the upper plate 1 and the upper surface 2a of the lower plate 2 are concave surfaces (for example, a spherical surface, a conical surface, a combined surface such as a spherical surface and a conical surface), and the concave surface 1a, The action of returning to the center position of 2a works, and the seismic isolation device has an origin return function. The support bodies 4 are arranged in a square shape, and a substantially cross-shaped space 14 is formed between the support bodies.

  In the cross-shaped space 14 between the upper plate 5 and the lower plate 6, a guide mechanism 7 having a cross-shaped guide rod 8 composed of a vertical guide rod 8y and a lateral guide rod 8x orthogonal to each other is interposed. 1 and 3, two guides 10x are arranged and fixed on the upper plate 5 along the lateral guide rods 8x. In FIGS. 1 and 2, two guides 10y are arranged and fixed on the lower plate along the longitudinal guide rod 8y. In FIG. 2, the vertical guide bar 8 y and the horizontal guide bar 8 x are overlapped so as to be orthogonal at the center, and are joined in a cross shape by bolts 23 via spacers 22 at the intersections. In FIG. 1, when the upper plate 5 moves laterally with respect to the lower plate 6 in a plan view, the vertical guide rods 8 y of the guide rods 8 that are integrated perpendicularly to each other are arranged and fixed to the lower plate 6. The two guides 10x arranged on the upper plate 5 slide on the lateral guide rod 9x along with the movement of the upper plate 5. On the other hand, when the upper plate 5 moves in the vertical direction with respect to the lower plate 6, the vertical guide rods 8 y that are orthogonally integrated with each other are aligned with the guides 10 y that are arranged and fixed on the upper plate 5. The upper plate 5 moves integrally with the upper plate 5. In both the vertical and horizontal movements, the upper plate 5 is blocked by the guide rods 8x and 8y and the guides 10x and 10y fixed to the upper and lower plates 5 and 6 even if the upper plate 5 tries to rotate with respect to the lower plate 6. The upper plate 5 cannot move with respect to the lower plate 6 without changing its posture in plan view. When the upper plate 5 moves in the vertical direction and the horizontal direction simultaneously with respect to the lower plate 6, each member moves in the above-described manner only by the vertical movement component and the horizontal movement component of the movement. As a result, as shown by a two-dot chain line in FIG. 1, the upper plate 5 can move horizontally without changing its posture in plan view with respect to the lower plate 6. Moreover, since it can move in the cross-shaped space 14, it does not interfere with the upper and lower plates 1 and 2 of the support body 4. An upper plate hole 5a is formed in the upper plate as a relief for the bolt 23 and the like. Thereby, the intersection part of a guide bar can be enlarged.

  As shown in FIG. 3, the guide 10 (the lateral guide bar guide 10x) has a substantially U-shaped cross section and is fixed on the opening side 10a on the upper and lower plates 5 and 6 side to form a guide hole 10b. A rod 8 (lateral guide rod 8x) is inserted. A gap 10 c is provided in the vertical direction between the guide hole 10 b and the guide rod 8, and can be slightly moved in the vertical direction so as to follow the vertical movement by the support body 4. Moreover, although the upper and lower plates are accompanied by movement in a minute range in the vertical direction, they do not fall apart. The lateral guide rod 8x is slidably guided by a sliding contact pad 21 mounted on a guide 10x disposed and fixed on the upper plate 5. The sliding contact pad 21 is in sliding contact with the lateral guide rod 8x by a spring 20 at a constant contact pressure at all times. According to such a configuration, the ability of the upper plate 5 to attenuate the longitudinal movement of the lower plate 6 in a plan view is always kept constant. The damping ability for the vertical movement is also kept constant, as is the damping ability for the horizontal movement. Moreover, in each figure, the ring-shaped stopper 24 is provided in the outer edge of each upper and lower dishes 1 and 2. As shown in FIG. The movement of the upper plate 5 with respect to the lower plate 6 by a certain amount or more is blocked by the guide rod and the guide so that the ball does not jump out of the upper and lower dishes 1 and 2. The ball can be prevented from popping out more reliably.

  In each figure, in order to move the balls 3 of each support body as a unit, it is located between the upper plate 1 and the lower plate 2 of each support body and at a position where it does not interfere with the vertical and horizontal guide rods 8 and each guide 10. A cage 12 is installed. The cage 12 is a thin plate, has a planar frame shape with square frame holes 12b, and has holes 12a for holding balls at the four corners. The frame hole 12b of the cage 12 is positioned outside the guide 10, and the vertical direction is set to a position generated between the upper and lower cross-shaped guide rods 8 by the spacer 22, and is held within the ball movement range. The container 12 and the guide 10 and the cage 12 and the cross-shaped guide bar 8 are prevented from interfering with each other. The upper portion of the pocket surface of the ball is a conical surface or a spherical surface so that the cage 12 does not drop by its own mass and interfere with the lower plate 2a or the like. According to such a configuration, each self-supporting movement of the ball of each support body can be suppressed, and a complicated cage guide mechanism as in the prior art is not necessary, so that the cost can be reduced.

  According to such a configuration, unlike the prior art, there is no need for a measure for perfectly aligning the directions of the guide rods, guides, and cages, and the upper plate 5 is in plan view with respect to the lower plate 6. There is no need for a complicated cage guide mechanism for moving without changing the posture, so that significant cost reduction and improved reliability can be realized.

  Next, a second embodiment of the present invention will be described. FIG. 4 is a perspective view of a guide according to the second embodiment of the present invention. Substantially the same members or parts are denoted by the same reference numerals, and a part of the description is omitted. In the first embodiment of the present invention, the guide is fixed so as to be orthogonal to the upper and lower plates, and a cross-shaped guide rod is interposed between the guides, whereas the second embodiment. In contrast, the guide rods are fixed so as to be orthogonal to the upper and lower plates, and a cross-shaped guide is interposed between the guide rods. As shown in FIG. 4, the cross-shaped guide 11 is obtained by fixing two guides 11x and 11y having a U-shaped cross section at right angles and fixing them with bolts, welding, or the like so that the opening sides 10a are in opposite directions. Each guide is provided with a sliding contact pad 21 and a spring 20. For example, when the guide span is short, the size can be reduced. Except for the relationship between the guide and the guide rod, the description is omitted because it is the same as the first embodiment.

  Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a plan view excluding the upper plate, the upper plate, and the upper stopper of the seismic isolation device according to the third embodiment of the present invention, and FIG. 6 is a sectional view taken along the line CC of FIG. 5 shows a state in which the ball position is moved and the upper plate and the lower plate are relatively displaced, and FIG. 6 is a cross section when the ball is in the original position in FIG. Further, substantially the same members or parts as those in the first and second embodiments described above are denoted by the same reference numerals, and a part of the description is omitted. In the first and second embodiments described above, the guide rod and the guide are disposed between the support bodies. However, in the third embodiment, the guide rod and the guide are disposed outside the support body. Furthermore, it is arranged on the outside of the two bearing bodies instead of the four bearing bodies. 5 and 6, the upper and lower plates 5 and 6 are each divided into two pieces, and are composed of a pair of left and right seismic isolation members 16. The seismic isolation member 16 has a pair of upper and lower plates 5 and 6 each having two support bodies 4 having the same structure as that of the first embodiment of the present invention. Between the pair of upper plate 5 and lower plate 6, a guide mechanism having a rectangular guide rod 9 composed of two pairs of vertical guide rods 9 y and lateral guide rods 9 x formed in a rectangular shape orthogonal to each other. 7 is interposed and is movable in the horizontal direction. On the upper plate 5, one horizontal guide guide 10 x is arranged and fixed on each side of the support body 4 along the vertical guide rod 9 y. 5 and 6, a horizontal guide guide 10x is arranged and fixed on the lower plate 6 along the horizontal guide bar 9x, one on each of the upper and lower sides of the support body 4 in the figure.

  In FIG. 5, two vertical guide bars 9y and horizontal guide bars 9x each have an end portion 9a overlapped so as to be orthogonal to each other, and at the intersection (end portion), as shown in FIG. In the same manner as described above, the bolts 23 are tightened through the spacers 22 and are combined in a rectangular shape. Each guide bar is guided by one guide 10y, 10x. The guide 10 and the rectangular guide rod 9 constitute a guide mechanism 7 and are arranged outside the support body so as to surround the two support bodies 4 each in a set. Each guide bar is slidably guided by a spring 20 and a slidable contact pad 21 mounted on the guide. Note that the number of guides 10 may be further increased.

  In this configuration, the movement of each member when the upper plate 5 moves in the horizontal direction with respect to the lower plate 6 is the same as in the first embodiment of the present invention. The plate 6 can be moved horizontally without changing its posture in plan view, and one independent seismic isolation member 16 is formed. Moreover, since the guide mechanism 7 is arranged outside so as to surround the support body 4, it does not interfere with the upper and lower plates 1 and 2 of the support body. Although the guide mechanism is arranged outside the support body, it is needless to say that if the travel distance of the guide mechanism is small, it may be outside the support body within the travel distance. Further, since each guide rod 9 is slidably guided at a constant contact pressure as in the first embodiment of the present invention, the damping performance of the seismic isolation device unit is always kept constant. It becomes. Further, ring-shaped stoppers 24 are provided on the outer edges of the upper and lower dishes 1 and 2 of each support body 4, so that the balls can be reliably prevented from jumping out from the dishes as in the first embodiment of the present invention.

  As shown in FIG. 5, a plurality of seismic isolation members 16 comprising the pair of upper and lower plates and members attached thereto are connected by a connecting rod 25 to form a seismic isolation device. For example, as shown by a two-dot chain line, Directional movement is possible. Furthermore, since the distance 18 of the seismic isolation member 16 in FIG. 5 can be freely set by the connecting rod 25 or the like, even a large installation space can be loaded. Even if multiple seismic isolation members are connected, each seismic isolation member moves as a single unit as a seismic isolation device, so that the overall motion of the seismic isolation device is smooth and the damping performance is always constant. Needless to say, it is kept constant. The same applies to the case where a plurality of support bodies are provided in a set of seismic isolation members.

  Next, a fourth embodiment of the present invention will be described. FIG. 7 is a plan view excluding the upper plate, upper plate, and upper stopper of the seismic isolation member according to the fourth embodiment of the present invention. FIG. 8 is a plan view of the seismic isolation device having a plurality of seismic isolation members of FIG. FIG. Further, substantially the same members or parts as those of the first to third embodiments described above are denoted by the same reference numerals, and a part of the description is omitted. As shown in FIG. 7, in the third embodiment described above, a guide mechanism is provided outside the two support bodies to provide a seismic isolation member, whereas in the fourth embodiment, one piece is provided. A guide mechanism 7 is provided on the outer side so as to surround the support body 4 to form a seismic isolation member 17. In this case, since one seismic isolation member is not stable, the seismic isolation device requires four sets of seismic isolation members 17 and may be fixed to a single upper and lower plate as shown in FIG. . Others are the same as those of the third embodiment, and the description thereof is omitted. Instead of the seismic isolation member, a plurality of seismic isolation devices may be arranged as in the past to form a single seismic isolation device. Furthermore, it is good also as one seismic isolation apparatus combining suitably a seismic isolation member and a seismic isolation apparatus.

It is a top view except the upper plate of the seismic isolation apparatus which is 1st embodiment of this invention, an upper plate, and an upper stopper. It is the sectional view on the AA line of FIG. FIG. 2 is a longitudinal sectional view taken along line BB in FIG. 1. It is a perspective view of the cross-shaped guide of the seismic isolation apparatus which is 2nd embodiment of this invention. It is the top view except the seismic isolation member and seismic isolation apparatus which are 3rd embodiment of this invention except the upper plate, the upper plate, and the upper stopper. It is CC sectional view taken on the line of FIG. It is the top view except the upper plate of the seismic isolation member which is the 4th embodiment of this invention, an upper plate, and an upper stopper. FIG. 8 is a plan view excluding an upper plate, an upper plate, and an upper stopper of a seismic isolation device in which a plurality of seismic isolation members of FIG. 7 are arranged.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper plate 1a Concave surface 2 Lower plate 2a Concave surface 3 Ball 4 Support body 5 Upper plate 6 Lower plate 7 Guide mechanism 8 (Cross shape) Guide rod 8x Lateral guide rod (Cross shape)
8y Longitudinal guide rod (cross shape)
9 (rectangular) guide bar 9x lateral guide bar (rectangular)
9y Longitudinal guide bar (rectangular)
10 guide 10a opening side 10b guide hole 10c gap 10x guide for horizontal guide bar 10y guide for vertical guide bar 11 (cross-shaped) guide 11x cross-shaped guide vertical guide 11y cross-shaped guide lateral guide 12 cage 12a ball holding Hole 12b Hole in frame 14 Cross-shaped space 16, 17 Seismic isolation member 20 Spring 21 Sliding pad 22 Spacer 23 Bolt 24 Stopper

Claims (8)

  An upper plate having a concave surface formed on the lower surface, a lower plate provided with a concave surface provided on the upper surface so as to face the concave surface of the upper plate, and the upper plate rotatably between the upper plate and the lower plate. One or more support bodies that form a set of balls that support the lower plate, an upper plate on which the upper plate of the support body is fixed, and the lower plate of the support body are fixed A seismic isolation device comprising: a lower plate; and a guide mechanism that allows the upper plate to move in a horizontal direction without changing a posture of the lower plate in a plan view. And a guide for holding each of the orthogonal guide rods so as to be movable in the axial direction. The guide rod and the guide are provided between the upper plate and the lower plate. Does not interfere with any of these even when viewed in plan Seismic isolation device characterized by being urchin.   There are four or more sets of the support bodies, the guide rods and the guides are arranged in a cross-shaped space formed between the support bodies, and the guides have a guide surface in one direction on the upper plate. A fixed upper guide; and a lower guide fixed to the lower plate so that a guide surface is orthogonal to the guide surface of the upper plate. The seismic isolation device according to claim 1, wherein the seismic isolation device is fitted to the guides of the upper and lower plates so as to be movable in the axial direction and finely movable in the vertical direction.   There are four or more sets of support bodies, the guide rods and guides are disposed in a cross-shaped space formed between the support bodies, and the guide bars are orthogonal to the upper plate and the lower plate, respectively. The upper and lower guides are integrated so that the upper and lower guides are orthogonal to each other, and the upper and lower guide rods are axially movable and vertically movable. The seismic isolation device according to claim 1, wherein the seismic isolation device is fitted so as to be slightly movable.   The guide bar and the guide are disposed outside the support body so as to surround one or more of the support bodies, and the guide bar is formed by fixing four bars so as to have a rectangular shape. According to each guide rod, the guide surface is fixed to the upper plate and the lower plate so as to be orthogonal to each other, and each guide rod forming the rectangle is axially movable to the guides of the upper and lower plates and vertically The seismic isolation device according to claim 1, wherein the seismic isolation device is fitted to the frame so as to be slightly movable.   5. The seismic isolation device according to claim 4, wherein the support bodies include two sets, and the guide rod and the guide are disposed so as to surround the two sets of support bodies to form a set of seismic isolation members. A seismic isolation device characterized by that.   A seismic isolation device comprising a plurality of seismic isolation members according to claim 4.   The guide rod is fixed by overlapping square bars at right angles, the guide has a substantially U-shaped cross section, the opening side is fixed to the upper or lower plate side, and the square bar is formed by the guide and the upper or lower plate. The seismic isolation device according to claim 2, 4, or 5, wherein a gap is provided in a vertical direction between the guide hole and the square member. 8. The ball bearing device according to claim 1, further comprising: a ball holder configured to hold the ball and not interfere with the guide mechanism. Seismic isolation device.

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