JP2008280818A - Base isolation structure of building and building adopting the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a base isolation structure of a building suitably adopted in small buildings such as general houses and acting an effective damper effect (attenuation effect) when a horizontal displacement of the skeleton of the building relative to the foundation thereof while sufficiently allowing the horizontal displacement of the skeleton relative to the foundation by a vibration isolating means. <P>SOLUTION: A base 50 is fixed to a foundation 46 while a metal connection member 14 is positioned on the sides of the base 50 and the foundation 46 and extends in the vertical direction. Therefore, the length dimension of the connection member 14 is larger than the distance between the fixed portions of the base 50 and the foundation 46 stacked on each other through the vibration isolating means. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention belongs to a related technology for a base-isolated structure of a building, and particularly relates to a technology for a base-isolated structure having a novel structure that is suitably employed in small buildings such as ordinary houses and warehouses.

  More specifically, a connecting member that connects the foundation and the foundation of the building whose relative displacement in the horizontal direction is allowed by the vibration isolation means and can exhibit a damper effect when the horizontal displacement of the foundation and the foundation is performed. The present invention relates to a seismic isolation structure for a building having a new structure and a building adopting it.

  As is well known, in a small building such as a general house, a base located at the lowermost part of the frame is placed on a foundation laid on the ground and fixed with anchor bolts. Thereby, the load of the upper structure containing a housing is transmitted to a support ground via the foundation as a lower structure, and a building is supported stably.

  By the way, in recent years, in order to protect the superstructure from external loads such as earthquakes, a seismic isolation structure in which a vibration isolation means such as a rubber mount is interposed between the foundation that is the input portion of the external load and the base of the superstructure. Has been proposed. According to this seismic isolation structure, even if the foundation is displaced in the horizontal direction due to an earthquake, the transmission of force from the foundation to the superstructure is reduced or blocked by the vibration insulation means, so that damage to the superstructure is effective. It can be suppressed to.

  However, in the conventional ordinary houses, as described above, the base is firmly fixed to the foundation by the anchor bolts. Therefore, when adopting the seismic isolation structure, it is necessary to eliminate the fixing structure between the foundation and the foundation by the anchor bolt and to allow relative displacement in the horizontal direction with respect to the foundation of the foundation.

  Therefore, in order to cope with this requirement, for example, in Patent Document 1 (Japanese Patent Laid-Open No. 10-220067) and Patent Document 2 (Japanese Patent Laid-Open No. 2000-110403), the periphery of the protruding portion of the anchor bolt on the upper end surface of the foundation It has been proposed to reduce the connecting force between the foundation and the foundation by anchor bolts and to allow relative displacement in the horizontal direction with respect to the foundation of the foundation by removing the wall in a counterbore shape.

  However, in the conventional structures shown in these Patent Documents 1 and 2, there is not only a great problem that the foundation strength is inevitably lowered by the counterbore of the foundation, but even if counterbore is provided, the foundation and the base are opposed to each other. Anchor bolts that extend between the surfaces and extend in the vertical direction have a very small free length, and therefore allow horizontal displacement of several tens of centimeters or more relative to the foundation of the frame required for the seismic isolation structure. It was extremely difficult.

  In addition, even if the foundation bolts are provided to allow bending deformation of the anchor bolts, the relative displacement in the vertical direction with respect to the foundation of the frame, which is the axial direction of the anchor bolts, can cause a large fastening force and tensile strength by the anchor bolts. Is almost unacceptable. Therefore, there was also a problem that the seismic isolation effect could hardly be exhibited for the vertical type earthquake with pitching.

  On the other hand, it is also proposed to employ only a stopper mechanism that limits the amount of horizontal displacement without using anchor bolts in order to allow horizontal displacement relative to the foundation of the housing. However, in such a structure, the damping action that suppresses the vibration displacement of the frame with respect to the foundation when an external force is applied due to an earthquake cannot be exhibited, and the frame repeats a reciprocating displacement in the horizontal direction for a long time. It was.

Japanese Patent Laid-Open No. 10-220067 JP 2000-110403 A

  The present invention has been made in the background as described above, and the problem to be solved is that it is suitably adopted for small buildings such as ordinary houses, and is based on the foundation of a housing by vibration isolation means. An object of the present invention is to provide a novel seismic isolation structure capable of exhibiting a further excellent seismic isolation effect while sufficiently allowing horizontal displacement, and to provide a building having such a seismic isolation structure.

  Hereinafter, the aspect of this invention made | formed in order to solve such a subject is described. In addition, the component employ | adopted in each aspect as described below is employable by arbitrary combinations as much as possible. In addition, aspects or technical features of the present invention are not limited to those described below, but are described in the entire specification and drawings, or can be understood by those skilled in the art from those descriptions. It should be understood that it is recognized on the basis of.

  That is, the feature of the present invention relating to a seismic isolation structure for buildings is that vibration isolation means is disposed between the foundation and the foundation of the building, and the load of the superstructure including the foundation in the building is the vibration. In the seismic isolation structure of a building that is supported and transmitted to the foundation through an insulating means, and that allows relative displacement in the horizontal direction of the upper structure of the building with respect to the foundation by the vibration insulating means. By disposing a metal connecting member located on the side of the foundation and extending in the vertical direction, fixing the upper end of the connecting member to the base, while fixing the lower end of the connecting member to the foundation, The foundation and the foundation are connected by the connecting member having a length dimension larger than the distance between the opposing surfaces in the vertical direction between the foundation and the foundation overlaid via the vibration isolation means. The superstructure is In seismic isolation of a building which is adapted it said coupling member is deformed when that is allowed relative displacement in the horizontal direction relative to the base.

  In such a base-isolated structure according to the present invention, the base and the foundation are connected to each other by a connecting member having a specific structure, and such a connecting member extends vertically on the side of the base and the base. Since the free length is secured largely by being arranged, horizontal relative displacement with respect to the foundation of the foundation can be allowed with a sufficient stroke based on the deformation of the connecting member. In particular, since it is not necessary to provide counterbore on the upper end surface of the foundation as described in Patent Documents 1 and 2, it is possible to set the free length of the connecting member large while ensuring sufficient strength of the foundation.

  Further, the connecting member may be formed of an appropriate metal material such as lead, copper, or steel so that plastic deformation is caused when the base is displaced in the horizontal direction with respect to the foundation. . The damper effect (damping effect) can be exhibited by this plastic deformation history. By this damper effect, the shaking of the superstructure can be quickly suppressed. Further, the connecting member is formed of an appropriate metal material such as steel or spring steel so that the connecting member can be elastically deformed to a region where the relative displacement with respect to the foundation of the base is considerably large. good. If the relative displacement of the foundation with respect to the foundation is small, the connecting member is deformed in the elastic deformation region. Therefore, the relative displacement with respect to the foundation is performed based on the elasticity of the connecting member such as steel or spring steel. The return operation to the initial position with respect to the foundation of the base that has been established can be manifested more quickly and automatically.

  In addition, since the total length (free length) of the connecting member is larger than the linear connection length between the foundation and the foundation (the vertical separation distance between the foundation-side coupling portion and the foundation-side coupling portion), the foundation and the foundation The relative displacement in the vertical direction is also allowed by the deformation of the connecting member. Moreover, even when the base and the foundation are displaced in the vertical direction, as described above, the damper effect based on the plastic deformation of the connecting member and the restoring effect to the initial position based on the elastic deformation are effectively exhibited.

  In addition, since the connecting member is formed of a metal material, the connecting member fixedly connects the foundation and the foundation to each other when an external force is exerted with a vibration acceleration that is small compared to vibration during an earthquake such as a strong wind. In other words, the so-called anchor function is exhibited and the stable support effect by the lower structure of the upper structure is also exhibited.

  In addition, in this aspect, the fixing | fixed site | part and fixing structure to the base and foundation in the upper end part and lower end part of a connection member are not specifically limited. Specifically, it is possible to form an insertion hole penetrating in the horizontal direction with respect to the base and the foundation, and to insert and fix the upper end portion and the lower end portion of the connecting member to the insertion hole. Alternatively, it is possible to provide a mounting member such as a base fixed in advance on the base or the foundation, and fix the upper end and lower end of the connecting member to the mounting member. In particular, since the base is generally made of wood or metal, it is possible to easily fix the upper end portion of the connecting member by drilling a hole in the base or fixing the screw. On the other hand, since the foundation is generally formed of reinforced concrete, it is possible to easily and sufficiently obtain the fixing strength of the connecting member with respect to the foundation by using the foundation reinforcement by locking the reinforcement. It becomes possible. In addition, when the foundation is formed of a cloth foundation, a solid foundation, or the like, the lower end portion of the connecting member can be fixed to the footing portion. In this case, for example, the connecting member is provided so as to extend upward from the upper surface of the footing at a position separated by a predetermined distance to the side of the foundation beam.

  Further, in the present invention, for example, the connecting member has an upper side protrusion projecting outward from the side surface of the base, and a lower side side extending outward from the side surface of the foundation beam in the foundation. A mode in which the projecting portion and the projecting tip portion of the upper end side projecting portion and the projecting tip portion of the lower end side projecting portion are integrally coupled to each other and include a central portion extending in the vertical direction. Can be suitably employed.

  By adopting such a connecting member, it is possible to more efficiently secure the free length of the connecting member while keeping the arrangement space of the connecting member relatively small. In addition, the protrusion direction from the foundation and base of the connecting member may be protruded toward the inside of the building, that is, below the edge, in addition to protruding toward the outside of the building.

  In the present invention, for example, a mode in which the connecting member has a smoothly continuous shape without having a bent portion over the entire length thereof can be suitably employed.

  In such a connecting member, stress concentration during deformation is relaxed and deformation occurs over a wide range in the length direction, so that the load bearing strength is increased and damping using plastic deformation is performed. An effect of restoring the initial position using the effect and elastic deformation can be advantageously achieved.

  In the present invention, for example, a plurality of the connecting members for connecting the base and the foundation are provided, and at least one of the plurality of connecting members has a different elastic limit with respect to the other connecting members. The aspect which is mentioned can be employ | adopted suitably.

  In such an aspect, by employing a plurality of connecting members having different elastic limits, for example, a damper effect due to plastic deformation is positively generated in one connecting member, while another connecting member is caused by elastic deformation. It is also possible to positively produce the restoring effect of the initial position. Therefore, the tuning flexibility of the seismic isolation effect including the damper effect and the restoration effect can be further improved.

  In the present invention, for example, a mounting base is fixed to the foundation, and the base-side fixing portion of the connecting member is fixed to a portion of the mounting base exposed from the side of the base. The embodiment is preferably adopted.

  In such an aspect, the connecting member can be fixed to the foundation after the foundation concrete is placed. Therefore, the foundation concrete formwork can be easily assembled without being obstructed by the connecting member protruding from the foundation, and workability such as foundation work can be advantageously ensured. The mounting base itself can also be used as a separator for fixing the width of the foundation concrete formwork.

  In the present invention, for example, a mode in which the connecting member is attached to the existing base and the foundation so as to be attached later can be suitably employed.

  In such an aspect, it is not necessary to assemble a connecting member for work such as foundation and foundation installation, and the foundation and foundation installation work is facilitated. In addition, when the connecting member is plastically deformed due to an earthquake or the like, the connecting member can be easily replaced. That is, in the present invention, a mode in which the connecting member is detachable from the base and the foundation may be employed. In addition, according to this aspect, a connecting member is attached to an existing ordinary house as it is if it is a base-isolated house, and if it is not a base-isolated house, along with the assembly of vibration isolation means. Can also be realized easily.

  Further, in the present invention, for example, when the base is relatively displaced in the horizontal direction with respect to the foundation, an aspect provided with an initial position restoring means that applies a restoring force in the returning direction to the initial position is preferably employed. Can be done.

  In such an aspect, the return operation to the initial position with respect to the foundation of the foundation, which is relatively displaced with respect to the foundation, is ensured, whereby the seismic isolation effect can be more advantageously exhibited. The initial position restoring means includes, for example, the frictional force acting between the overlapping surfaces of the members overlapped with each other as well as the elasticity of the connecting member having the elastic limit tuned as described above, and the convex portion as a recess. A mechanical structure or the like that is supported on the surface is employed.

  In the present invention, for example, a lower support member fixed to the foundation and an upper support member fixed to the base are arranged so as to overlap each other in the vertical direction, and the lower support member and the upper support member By forming a mortar-shaped recess that opens toward the other of the opposing surfaces, and incorporating a spherical rolling member between the opposing surfaces of both the lower support member and the upper support member, In the normal state in which the vibration isolating means is configured and the lower support member and the upper support member are aligned on the same central axis, the recesses of the lower support member and the recesses of the upper support member are arranged. The rolling member is positioned between the central deepest portions, and when the superstructure of the building is relatively displaced in the horizontal direction with respect to the foundation, the lower support member The recess and the recess of the upper support member Structure where the rolling member in the direction so as be moved to raise Ri is preferably employed.

  By adopting vibration isolation means with such a specific structure, when the base is displaced relative to the foundation in the horizontal direction due to its component force, utilizing the great gravity of the superstructure in the house It is possible to effectively obtain the return force, that is, the acting force in the direction of returning to the initial position. Therefore, it is possible to obtain a greater centripetal force than the centripetal force solely due to the elasticity of the connecting member, and the upper structure is fixed and supported with respect to the foundation when a relatively small external force is applied, thereby stabilizing the upper structure. It can be supported. Also, even when a horizontal force is exerted during an earthquake or the like, if the connecting member does not reach the plastic deformation region, based on the elasticity of the connecting member and the component force action of the upper and lower structure gravity by the vibration insulating means, The attenuating action is exerted, and the horizontal displacement of the superstructure is converged more quickly and is quickly returned to the initial position.

  Further, in the vibration isolating means as described above, when the base is displaced in the horizontal direction with respect to the foundation, the rolling member can be moved in a direction to ride over the recess of the lower support member and the recess of the upper support member. Thus, the vertical support members are separated from each other in the vertical direction, and the base is displaced upwardly with respect to the foundation. Therefore, by adopting a combination of the connecting member having a specific structure according to the present invention and the specific vibration isolating means, the base and the foundation can be relatively displaced not only in the horizontal direction but also in the vertical direction during horizontal vibration. As a result, the connecting member is more efficiently deformed. Thereby, the damper effect based on the plastic deformation of the connecting member can be more effectively exhibited, and a further excellent seismic isolation effect can be realized.

  In addition, the shape of the bottom surface of the recess in the vibration isolating means is not particularly limited, and the required damping effect and expectation including the inclination angle gradually rising toward the outer peripheral side, the opening area, etc. It is designed appropriately in consideration of the magnitude of the vibration external force to be generated and the magnitude of the relative displacement amount with respect to the foundation of the superstructure expected at the time of the earthquake action. Specifically, for example, the bottom surface of the recess may be a conical shape or a curved mortar shape, and a flat surface may be formed at the center portion, or the center may be a sharp shape.

  In the present invention, for example, the mortar-shaped recess is composed of a central portion having a conical surface shape and an outer peripheral edge portion having a curved surface shape, and the central portion of the conical surface shape is the curved portion. The aspect extended in the tangential direction of the outer peripheral edge part of a surface shape may be employ | adopted suitably.

  In such an embodiment, the deepest central part of the recess can be advantageously realized by the central part of the conical surface shape, and the slope of the conical surface becomes a resistance when an external force with a small vibration acceleration, such as wind, acts as a resistance. And the connection of the foundation is kept stable. In addition, since the outer peripheral side of the central portion, that is, the outer peripheral edge of the recess, has a curved surface shape, it is limited that the rolling member is greatly displaced in the direction of protruding from the recess. Is suppressed from excessively displacing, and as a result, large shaking of the superstructure can be suppressed more quickly.

  In the present invention, for example, the lower support member fixed to the foundation and the upper support member fixed to the base are arranged so as to overlap each other in the vertical direction, and the upper surface of the lower support member is While forming a mortar-shaped recess that opens toward the bottom, a contact protrusion that protrudes downward is formed on the lower surface of the upper support member, and the corresponding contact protrusion of the upper support member is The vibration isolation means is configured by projecting into the recess of the side support member, and the lower support member is normally used when the lower support member and the upper support member are aligned on the same central axis. The upper support member is protruded from the central deepest portion of the recess, and the upper structure of the building is displaced relative to the foundation in the horizontal direction. The upper support member Aspects part has to be moved in the direction rides the inner surface of the recess of the lower side support member in a contact state is preferably employed.

  Even when adopting such a vibration isolation means of a specific structure, similarly to the case of adopting the vibration isolation means configured to include the rolling member described above, skillfully utilizing the large gravity of the upper structure in the house, With the component action, it is possible to obtain a centering force when the base is displaced relative to the foundation in the horizontal direction, and when the vibration isolating means configured to include the above-mentioned rolling member is employed. Any of the same effects can be effectively exhibited.

  In addition, in this aspect, since the rolling member is unnecessary, the number of parts can be reduced and the structure can be simplified. In this aspect, the contact protrusion in the upper support member may be formed integrally with the upper support member, or formed by assembling a sphere or the like formed separately from the upper support member. May be.

  Moreover, in this invention, the aspect by which the said mortar-shaped recessed part was made into the cone surface shape as a whole can be employ | adopted suitably, for example.

  In such an embodiment, the top of the conical surface can be advantageously realized with a simple structure at the central deepest part of the recess, and the conical surface slope is resisted when an external force with a small vibration acceleration such as wind is applied. Thus, the connection between the foundation and the foundation is stably maintained.

  Furthermore, in the vibration insulating means having a specific structure that employs a rolling member or a contact protrusion as described above, for example, a mode in which a viscous material is accommodated in a recess of the lower support member is preferably employed. The

  By accommodating the viscous material using the recess in this way, the horizontal relative displacement with respect to the foundation of the foundation based on the rolling and sliding of the rolling member and the abutting member is more stable and allowed with a predetermined resistance. As a result, the reliability of the base isolation structure can be improved.

  In short, in the present invention, when adopting the vibration isolation means having a specific structure employing the above-described contact protrusion, a recess is formed on the lower surface of the upper support member and the upper surface of the lower support member. It is also possible to form an abutting protrusion against the upper support member, while forming a recess with respect to the upper surface of the lower support member as described above, as compared with such a case. In the aspect in which the contact protrusion is formed on the lower surface of the material, a more excellent effect such as improvement in reliability can be realized by accommodating the viscous material in the recess.

  As the viscous material, various liquid or gel friction reducers such as oil and grease can be used. Preferably, the material is hydrophobic (lipophilic) to cope with rainwater intrusion. Desirably, higher fire resistance is more desirable.

  In addition, when adopting the viscous material housing structure in such a vibration insulating member, for example, in the normal state, the lower support member and the upper support member are sealed with each other at the outer peripheral edge of the recess. A mode that is adapted to be brought into contact with is preferably employed.

  According to such an aspect, it is possible to effectively prevent a problem in which rainwater or the like intrudes into the inside during normal times and the durability and operability are lowered, and the reliability can be improved.

  Further, the present invention relating to a building is characterized by a building that employs a seismic isolation structure for a building that has the structure according to the present invention as described above.

  Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described. First, the principal part of the building 12 which employ | adopted the seismic isolation structure 10 as one Embodiment which concerns on the seismic isolation structure of the building of this invention by 1 and 2 is shown. The seismic isolation structure 10 includes a damper anchor 14 as a connecting member and a roller packing 16 as vibration isolation means. In the following description, unless otherwise specified, the vertical direction refers to the vertical direction in FIGS.

  More specifically, as shown in FIGS. 3 to 7, the damper anchor 14 is made of a metal material extending in a substantially constant circular cross section over substantially the whole, and a bolt portion 18 disposed at the upper portion and the center. The curved portion 20 disposed in the portion and the fixed plate portion 22 disposed in the lower portion are formed integrally with each other.

  The bolt portion 18 extends substantially straight in the left-right direction (left and right in FIG. 2), and the outer peripheral surface is entirely subjected to male thread processing. In addition, a fixed plate portion 22 is disposed at a lower portion of the damper anchor 14 that is spaced a predetermined distance in the vertical direction from one end portion (right in FIG. 2) of the bolt portion 18.

  The fixed plate portion 22 has a substantially rectangular flat plate shape, and the plate thickness direction of the fixed plate portion 22 extends substantially parallel to the axial direction of the bolt portion 18. A curved portion 20 is formed between the bolt portion 18 and the fixed plate portion 22.

  The curved portion 20 is curved in a substantially bow shape so as to be convex in one of the left and right directions (right in FIG. 2), and one end (upper in FIG. 2) is one end of the bolt portion 18 (see FIG. 2). 2 and right) and the other end (lower in FIG. 2) of the bending portion 20 is connected to the central portion of one end surface (right in FIG. 2) of the fixed plate portion 22. It is connected. As is clear from this, the damper anchor 14 includes a curved portion in which substantially the entire portion excluding the bolt portion 18 and the fixed plate portion 22 is configured by the curved portion 20.

  In addition, the shape of the bending part 20 which concerns on this embodiment is not limited at all, and as FIG. 1 shows, the shape which curves smoothly smoothly without having the bent part over the full length. Alternatively, as shown in FIG. 2, the central portion of the bending portion 20 may be bent in a direction opposite to the bending direction of the bending portion 20.

  In the present embodiment, a plurality of damper anchors 14 are provided at a predetermined distance in the horizontal direction between the foundation 50 and the cloth foundation 46 described later of the building 12 to connect the foundation 50 and the cloth foundation 46. The material for forming each damper anchor 14 is changed according to the intended damping effect, initial position restoring effect, and other seismic isolation effects. Specifically, for example, one or more of the damper anchors 14 are formed using lead, copper, steel, or the like, so that the plastic deformation is caused when the base 50 and the cloth foundation 46 are displaced in the horizontal direction. A damping effect based on the above may be exhibited. Further, for example, when one or more of the damper anchors 14 are formed of steel, spring steel, or the like, the base 50 and the fabric foundation 46 are subjected to elastic deformation when the base 50 and the cloth foundation 46 are displaced in the horizontal direction. The initial position restoring effect of returning the fabric to the initial position with respect to the fabric foundation 46 may be exhibited. In the present embodiment, in order to obtain both the damping effect and the initial position restoring effect by the damper anchors 14, the damper anchors 14 having the respective effects are employed in combination, so that at least one of the plurality of damper anchors 14 is used. Have different elastic limits with respect to the other damper anchors 14. In the present embodiment, the present invention is not limited to this. For example, all damper anchors 14 may be used by adopting the same material for all the damper anchors 14 according to the target seismic isolation effect as described above. The elastic limit may be made substantially equal to achieve the same effect. Further, by adopting a material having elasticity and plasticity for the damper anchor 14, it is possible to obtain a damping effect and an initial position restoring effect with one damper anchor 14.

  Further, the fixed plate portion 22 of the damper anchor 14 is attached to an anchor plate 24 as an attachment base. The anchor plate 24 has a substantially rectangular flat plate shape that is slightly larger than the fixed plate portion 22 and is thick, and a plurality of hooks 26 are fixedly provided. These hooks 26 are not particularly limited as long as they can be locked to a fabric foundation 46 and a reinforcing bar 52 embedded in the fabric foundation 46, which will be described later. An upper hook 26a that extends obliquely upward on one side in the left-right direction (left in FIG. 2) from the upper end surface and has a distal end portion curved, and an end surface below the base end portion of the upper hook 26a in the anchor plate 24 A pair of lower hooks 26b that extend straight in one direction in the left-right direction and whose tip portions are curved are provided in pairs, and are arranged at a predetermined distance in the longitudinal direction of the anchor plate 24. Further, a separate bolt 28 is screwed and fixed to the central portion of the anchor plate 24 so as to extend between the pair of lower hooks 26b and 26b in parallel with the lower hook 26b. Thereby, the anchor plate 24 can be used also as a separator for fixing the width of the concrete formwork.

  On the other hand, the roller packing 16 includes an upper collar member 30 as an upper support member and a lower collar member 32 as a lower support member as shown in FIGS. In the present embodiment, the shape, size, and structure of the upper collar member 30 and the lower collar member 32 (hereinafter also referred to as the upper and lower collar members 30, 32) are the same.

  As shown in FIGS. 10 and 11, the upper and lower flange members 30 and 32 are formed using an elastic material having a substantially rectangular flat plate shape. As the elastic material, for example, natural rubber, styrene butadiene rubber, acrylonitrile butadiene rubber, silicon rubber, styrene-based or vinyl chloride-based elastomer, etc. are used alone or appropriately mixed with them, desirably pressure resistance performance or Those with excellent corrosion resistance and high damping characteristics are used. The use of the elastic material enables the upper and lower eaves members 30 and 32 to exhibit an action such as a function of absorbing and absorbing response shock energy against the seismic vibration of pitching, while maintaining stability against a long-term vertical load. The supporting action can also be achieved.

  In addition, a mortar-shaped recess 34 that opens in a circular shape from the vicinity of the bottom toward one end (upper in FIG. 11) is formed in the central portion of the upper and lower saddle members 30 and 32. The edge of the mortar-shaped recess 34 is positioned inside the outer peripheral edge of the substantially square shape of the upper and lower bowl members 30, 32, and the depth dimension of the mortar-shaped recess 34 is set to the inner side from the outer peripheral edge. The upper and lower saddle members 30 and 32 are maximized in the central portion. In particular, in the present embodiment, the depth dimension is slightly changed from the central portion to the outer peripheral portion of the mortar-shaped recess 34, while the change is abruptly increased from the outer peripheral portion to the peripheral portion. In the longitudinal section of the member 30, the bottom surface from the central portion to the outer peripheral portion of the mortar-shaped recess 34 is gently curved, and the bottom surface from the outer peripheral portion to the peripheral portion is greatly curved.

  A steel plate 36 made of stainless steel or the like is attached to one end surface (upper in FIG. 11) of the upper and lower bowl members 30 and 32 including the bottom surface of the mortar-shaped recess 34. Since the thickness dimension of the steel plate 36 is substantially constant over the entire surface, the curvature of the surface of the steel plate 36 in the portion deposited on the bottom surface of the mortar-shaped recess 34 is the same as that of the bottom surface of the mortar-shaped recess 34. It is almost the same as the curvature. Moreover, the corner | angular part by the side to which the steel plate 36 was attached in the up-and-down saddle members 30 and 32 has a shape where it notched diagonally.

  Further, the outer peripheral edge of the steel plate 36 extends toward the surface on the opposite side of the upper and lower saddle members 30 and 32 where the steel plate 36 is provided, so as to extend at a predetermined length that does not reach the surface. The members 30 and 32 are formed on the outer peripheral edge portions. The length of the outer peripheral edge of the steel plate 36 is substantially the same as the depth of the center bottom of the mortar-shaped recess 34. That is, in the vertical saddle members 30 and 32 according to the present embodiment, a region extending from the surface on the opposite side to where the steel plate 36 is provided in the thickness direction (up and down in FIGS. 8 and 9) to the steel plate 36 is substantially rectangular. The rubber layer 39 is made of a flat plate elastic material. Moreover, although omitted in FIG. 8 and the like, a plurality of groove portions are formed over substantially the entire surface of the rubber layer 39 provided on the opposite side of the steel plate 36 in the upper and lower saddle members 30 and 32. The anti-slip process is given by. The thickness dimension of the steel plate 36 is sufficient to suppress the compressive deformation of the upper and lower saddle members 30 and 32 due to the vertical load exerted when stationary, while the thickness dimension of the rubber layer 39 is When the eaves members 30 and 32 are superposed on the foundation 50 and the foundation beam 56 described later, the displacement in the width direction is absorbed by shearing deformation, or the housing region 38 of the upper and lower eaves members 30 and 32 described later is steel. When the ball 40 is accommodated and disposed, the thickness is sufficient to absorb a dimensional error of the steel plate 36, the steel ball 40, etc. due to elastic deformation of the rubber layer 39.

  In the present embodiment, the first curved surface 41 is formed by the surface of the steel plate 36 that is attached to the bottom surface that is gently curved from the central portion to the outer peripheral portion of the mortar-shaped recess 34 and is curved with substantially the same curvature as the bottom surface. The second curved surface 43 is formed by the surface of the steel plate 36 that is formed and is attached to the bottom surface that is largely curved from the outer peripheral portion to the peripheral portion of the mortar-shaped recess 34 and is curved with substantially the same curvature as the bottom surface. Is formed. The first curved surface 41 and the second curved surface 43 are smoothly connected. Further, a flat surface 45 is formed by the substantially flat surface of the steel plate 36 applied to the surface extending from the mortar-shaped recess 34 to the outer peripheral side of the upper and lower saddle members 30 and 32. The first and second curved surfaces 41, 43 and the flat surface 45 are roughened by shot blasting throughout.

  The upper eaves member 30 and the lower eaves member 32 are opposed to each other in the vertical direction so that the surfaces on which the steel plates 36 are provided face each other, and the central axes of the upper and lower eaves members 30 and 32 are located on the same line. Under the condition, the flat surfaces 45, 45 of the upper and lower saddle members 30, 32 are superposed on each other, so that the first and second curved surfaces 41, 43 of the steel plate 36 applied to each mortar-shaped recess 34 cooperate. Thus, a housing area 38 having a substantially flat spherical shell shape is formed.

  As is clear from the above description, the depth dimension of the mortar-shaped recess 34 is gradually increased from the outer peripheral edge toward the inside, and is maximized in the central portion of the upper and lower saddle members 30 and 32. In the central portion of the housing region 38 constituted by a pair of the first curved surfaces 41 of the steel plate 36 deposited on the bottom surface of each mortar-shaped recess 34, the height dimension H1 of the central portion is maximized. It is gradually made smaller from the central part toward the outer peripheral part. Further, the outer peripheral portion or the outer peripheral portion of the accommodation region 38 constituted by a pair of second curved surfaces 43 attached to the bottom surface of the mortar-shaped recess 34 where the change in depth dimension suddenly increases from the outer peripheral portion to the peripheral portion. In the outer peripheral edge portion, the height dimension of the portion connected to the central portion of the accommodation region 38 is H2, and H1> H2.

  A steel ball 40 as a rolling member is accommodated in the accommodation area 38. The steel ball 40 is a substantially spherical body whose cross section passing through the center is a circular shape having substantially the same size, and is formed using a highly rigid material such as stainless steel.

  Here, the diameter dimension of the steel ball 40: φA and the maximum height dimension of the accommodation area 38: H1 are substantially equal, so that the steel ball 40 is accommodated in the central portion of the accommodation area 38 in the vertical direction. The center axis of the flange members 30 and 32 and the center of the steel ball 40 are substantially matched, and the roller packing 16 is in an initial state (normal state). Further, by rotation along the first and second curved surfaces 41 and 43 of the steel ball 40, the upper rod member 30 and the lower rod member 32 can be relatively displaced by 360 ° in the horizontal direction. Further, the steel ball 40 moves so as to run from the deepest part of the center toward the shallow part of the periphery along the shapes of the first and second curved surfaces 41 and 43 by the rotation, and the upper and lower members 30 and 30 When the member 32 is relatively displaced in the horizontal direction, due to the difference in height, the component force of the weight of the building 12 is caused to act in a direction to return the upper rod member 30 to the initial position with respect to the lower rod member 32. The roller packing 16 has a beneficial effect on the centripetal action.

  The relationship between the diameter dimension of the steel ball 40: φA and the maximum inner dimension (maximum height dimension) of the accommodation region 38: H1 does not necessarily have to be substantially the same. For example, the diameter dimension of the steel ball 40 : ΦA is made smaller than the maximum height dimension: H1 of the accommodation area 38, so that the steel ball 40 is positioned in the central portion of the accommodation area 38, and the space between the steel ball 40 and the accommodation area 38. There may be gaps. Thereby, avoiding that the load of the wooden house 44 of the building 12 is intensively applied via the steel balls 40 that are in contact with each other between the steel plates 36 in the central portion of the housing region 38 in a substantially point-like manner, It is also possible to suitably ensure the durability of the roller packing 16. In addition, since the upper and lower saddle members 30 and 32 are not overlapped across the steel ball 40 in the initial state in which the steel ball 40 is positioned at the central portion of the accommodation region 38, for example, external pressure such as wind with small vibration acceleration is applied. Even if it is exerted on the building 12, the rotational displacement of the steel ball 40 is restricted, so that the horizontal displacement of the upper and lower saddle members 30, 32 and the base 50 and the fabric foundation 46 is restricted, and a small external pressure is applied. Then, it is possible to prevent the wooden house 44 from moving easily. Further, in the event of an earthquake with a large vibration acceleration, the base 50 and the fabric foundation 46 are relatively displaced in the horizontal direction, and the steel ball 40 rotates by coming into contact with the second curved surface 43 of the outer peripheral portion of the accommodation region 38. Alternatively, the building 12 may be returned to the central portion of the housing area 38 by utilizing the component weight of the building 12.

  Alternatively, the diameter dimension of the steel ball 40: φA is made larger than the maximum height dimension of the accommodation area 38: H1, so that the upper and lower cage members are in a single product state before the roller packing 16 is mounted on the building 12. When the pair of steel plates 36 and 36 in the accommodation areas 38 of 30 and 32 are overlapped with the steel ball 40 interposed therebetween, there is a gap between the flat surfaces 45 and 45 on which the steel plates 36 and 36 are overlapped. good. When the roller packing 16 is mounted between the base 50 and the foundation beam 56, the weight of the wooden house 44 is exerted on the roller packing 16, and the rubber layers 39 of the upper and lower eaves members 30 and 32 are elastically deformed. Accordingly, the gap between the overlapping surfaces of the steel plates 36, 36 may be reduced or eliminated. As a result, the upper and lower eaves members 30 and 32 are firmly overlapped in the vertical direction, and the weight of the wooden house 44 is greatly exerted on the pair of steel plates 36 and 36 via the steel balls 44. It is also possible to suppress the displacement of the wooden house 44 due to the horizontal relative displacement of the base 50 and the cloth foundation 46 by preventing the 40 from rotating easily.

  On the other hand, the relationship between the diameter dimension of the steel ball 40: φA and the inner dimension (height dimension) of the connecting portion between the central portion and the outer peripheral portion in the accommodating region 38: H2 is preferably φA ≧ H2. In particular, in this embodiment, the radius of the steel ball 40 is substantially the same as the radius of curvature of the second curved surface 43 of the steel plate 36 applied from the outer peripheral portion where the curvature of the mortar-shaped recess 34 increases to the peripheral portion. ing. As a result, as shown in FIG. 12, the upper and lower saddle members 30 and 32 are relatively displaced by the rolling action of the steel balls 40, and the outer peripheral surfaces of the steel balls 40 become the second curved surfaces 43 and 43. When contacted, the upper and lower rod members 30 and 32 are engaged with each other via the steel balls 40 so that further displacement of the upper rod member 30 and the lower rod member 32 in the same direction is limited. It has become. That is, after the upper and lower saddle members 30 and 32 are displaced in the horizontal direction by a predetermined amount, the resisting force works and stops.

  In addition, a highly viscous fluid 42 as a viscous material is accommodated in the accommodating region 38 of the roller packing 16. Accordingly, when the vertical saddle members 30 and 32 are displaced in the horizontal direction, the steel balls 40 rotate on the roughened first and second curved surfaces 41 and 43, or the pair of flat surfaces 45 and 45 are relative to each other. Combined with the damping effect due to the displacement, the damping effect is more greatly activated, and the slip prevention of the steel ball 40 and the suppression of the frictional noise during the rotational movement can be achieved. As the high-viscosity fluid 42, a viscous material that can exhibit a predetermined liquid or gel-like resistance, such as oil or grease, can be used. Hydrophobic materials are desirable to cope with rainwater intrusion and the like. The highly viscous fluid 42 is located in the accommodation area 38 in which the steel balls 40 are accommodated. When the highly viscous fluid 42 is positioned inside the mortar-shaped recess 34 of the lower collar member 32 by gravity, the mortar-shaped recess 42 is provided. 34 is accommodated in the accommodating area 38 in an amount not exceeding the half of the capacity of the accommodating area 38 in which the steel balls 40 are accommodated. In the initial state of the roller packing 16, the upper and lower eaves members 30 and 32 are brought into contact with each other in a sealed state at the outer peripheral edge of the mortar-shaped recess 34. The deterioration of the operability of the roller packing 16 due to the intrusion is advantageously prevented.

  In the present embodiment, the relationship between the diameter dimension of the steel ball 40: φA, the maximum inner dimension of the receiving area 38: H1, and the inner dimension of the connecting portion between the central portion and the outer periphery of the receiving area 38: H2 is desirable. H2 ≦ φA ≦ 1.2 · H1, more preferably 1.2 · H2 ≦ φA ≦ H1. When φA <H2, the diameter dimension of the steel ball 40: φA is smaller than the inner dimension of the connecting portion between the central portion and the outer peripheral portion in the accommodating region 38: H2, and the steel ball 40 This is because it is difficult to easily come into contact with the outer peripheral edge portion of the second curved surface 43, and the required relative displacement amount between the base 50 and the foundation beam 56 may be difficult to be secured. If φA> 1.2 · H1, the diameter dimension of the steel ball 40: φA is too large compared to the maximum inner dimension of the accommodation area 38: H1, and the weight of the building (the wooden house 44) is steel. As a result of being concentrated on the sphere 40, the durability of the steel ball 40 or the steel plate 36 in contact with the steel ball 40 becomes difficult to be ensured, and in addition, the rotation of the steel ball 40 is remarkably limited. This is because the relative displacement between the base 50 and the foundation beam 56 may be difficult to ensure.

  Next, the building 12 that adopts the seismic isolation structure 10 including the damper anchor 14, the roller packing 16, the anchor plate 24 and the like as described above will be briefly described. The building 12 is a building (upper structure). It includes a wooden house 44 and a cloth foundation 46 as a foundation (understructure). The wooden house 44 is constructed by a wooden frame construction method (conventional construction method), and a pillar 48, a beam, a base 50, and the like are constructed. On the other hand, the cloth foundation 46 is a reinforced concrete that extends horizontally in an inverted T-shaped cross section by installing a formwork (not shown) on the constructed ground, incorporating a plurality of reinforcing bars 52, and pouring concrete into the formwork. Thus, a structure in which a foundation beam 56 projects from the upper surface of the footing 54 is presented. Note that a level mortar is formed on the upper end surface of the foundation beam 56 so that the upper end surface extends in the horizontal direction with a level or the like.

  Here, concrete is cast in a state where the upper hook 26a and the lower hook 26b of the anchor plate 24 are locked to the reinforcing bar 52 of the cloth foundation 46, so that one of the foundation beams 56 (right in FIG. 2). The anchor plate 24 is embedded and fixed to the foundation beam 56 in a form in which the surface of the anchor plate 24 is exposed from the side portion of the base plate 56. In addition, it is possible to fix the width of the concrete form using the separate bolt 28 provided on the anchor plate 24, and the work process can be simplified.

  A plurality of roller packings 16 are arranged between the base 50 located at the lowermost part of the wooden house 44 and the foundation beam 56 of the fabric foundation 46, directly below the pillar 48 or at a position away from the pillar 48. Yes.

  That is, the rubber layer 39 in which the center part of the upper collar member 30 of the roller packing 16 is positioned at the center part in the width direction (left and right in FIG. 2) of the base 50 and the upper collar member 30 is subjected to anti-slip processing. The upper surface (upper end surface) of the upper base member 50 is superimposed on the lower end surface of the base 50, and a plurality of fixing bolts 58 are screwed and fixed to the base 50 through the corners of the upper collar member 30. Further, a rubber layer in which the center portion of the lower gutter member 32 of the roller packing 16 is positioned in the middle portion of the foundation beam 56 in the width direction (left and right in FIG. 2) and the lower gutter member 32 is subjected to anti-slip processing. The surface (lower end surface) 39 is superposed on the upper end surface of the foundation beam 56 (level mortar), and a plurality of fixing bolts 58 are screwed and fixed to the foundation beam 56 through each corner of the lower collar member 32. ing. Further, the flat surfaces 45 of the steel plates 36 of the upper and lower saddle members 30 and 32 are overlapped with each other in the vertical direction (up and down in FIG. 1), and the central portion of each steel plate 36 (the center of the first curved surface 41). Part) sandwiches and supports the steel balls 40 from both sides in the vertical direction.

  Thereby, the wooden house 44 provided with the base 50 is placed on the cloth foundation 46 via the plurality of roller packings 16 so that the load of the wooden house 44 is shared by the roller packings 16 and transmitted to the cloth foundation 46. It has become. Here, in normal times when a large external pressure such as an earthquake is not exerted on the wooden house 44, the center portion of the upper rod member 30 and the center portion of the lower rod member 32 are overlapped via the steel ball 40 by the centering function. The center portion in the width direction of 50 and the center portion in the width direction of the foundation beam 56 are aligned with each other. In addition, the steel ball 40 is displaced in the direction of climbing the recess 34 from the central portion of the mortar-shaped recess 34 toward the outer peripheral portion under a state in which the load of the wooden house 44 is applied to the cloth foundation 46 via the roller packing 16. Thus, the wooden house 44 provided with the base 50 and the cloth foundation 46 can be displaced by 360 ° in the horizontal direction by deformation based on the horizontal displacement of the upper and lower eaves members 30 and 32 in the roller packing 16. It is said that. On the other hand, the steel ball 40 comes into contact with the surfaces (second curved surfaces 43, 43) of the steel plates 36, 36 attached to the peripheral portions of the mortar-shaped recesses 34, 34 of the upper and lower saddle members 30, 32. The amount of relative displacement in the horizontal direction between the wooden house 44 and the cloth foundation 46 is limited by the locking action to be exerted, so that the wooden house 44 can be prevented from falling off from the cloth foundation 46.

  In particular, in the present embodiment, upper and lower draining plates 60 and 62 are disposed outside the building 12 on the side of one side of the base 50 and the foundation beam 56 (left in FIG. 2). These upper and lower draining plates 60 and 62 have a long plate shape, and the upper draining plate 60 is fixed to the base 50 with bolts or the like so as to project outward from the base 50 and extend in parallel with the base 50. In addition, a sewage draining plate 62 protrudes outward from the foundation beam 56 and extends parallel to the foundation beam 56 so that bolts or the like are attached to the lower collar members 32 of the plurality of roller packings 16 fixed to the foundation beam 56. It is fixed with. Further, the upper and lower draining plates 60 and 62 have a shape that is bent in the vertical direction, and the upper drainage is performed with the center portion in the width direction of the base 50 and the center portion in the width direction of the foundation beam 56 being aligned. The lower end portion of the plate 60 and the upper end portion of the sewage draining plate 62 are slightly more in the vertical direction outside the building 12 than the gap between the base 50 where the plurality of roller packings 16 are disposed and the foundation beam 56. Opposite positions are spaced apart. Thereby, while allowing the relative displacement of the base 50 and the cloth foundation 46 in the horizontal direction, the upper and lower draining plates 60 and 62 can suppress the entry of wind and rain into the gap between the base 50 and the foundation beam 56. ing. In addition, the space between the base 50 and the foundation beam 56 and the underfloor space are communicated with the external space through a plurality of small through holes 64 penetrating the upper and lower draining plates 60 and 62. By this, the ventilation efficiency under the floor is improved.

  Further, the bolt portion 18 of the damper anchor 14 is inserted into a through-hole 66 formed so as to extend in a direction perpendicular to the longitudinal direction of the base 50 and open on both sides of the base 50, and both ends of the bolt portion 18. The base 50 is fixed by being sandwiched from both sides by a pair of presser nuts 68 and 68 that are screwed to each other.

  The bolt portion 18 is fixed to the base 50 and the fixing plate portion 22 of the damper anchor 14 is superposed on the surface of the anchor plate 24 exposed on the side of the foundation beam 56 to form a pair of fixing bolts 70, 70. Is fixed to the anchor plate 24 by screwing through the fixing plate portion 22. As a result, the damper anchor 14 is fixed to the base 50 and the cloth foundation 46 by retrofitting, and the base 50 and the cloth foundation 46 are rigidly connected. The bolt portion 18 and the fixing plate portion 22 can be removed after being fixed to the base 50 and the foundation beam 56, respectively, so that the damper anchor 14 can be attached to and detached from the base 50 and the cloth foundation 46. Has been.

  In the present embodiment, as shown in FIG. 1, the roller packing 16 having a high load resistance is disposed directly under the column 48 where the shared load is large, and the base 50 and the base 50 are located at a position near the column 48. A damper anchor 14 fixed to the foundation beam 56 is disposed. Thereby, the operational stability of the roller packing 16 is ensured while preventing the strength deterioration of the base 50 directly under the pillar 48.

  A plurality of damper anchors 14 fixed in this way are located at a predetermined position between the base 50 and the cloth foundation 46, for example, between the opposing surfaces of the base 50 and the cloth foundation 46 located in the rectangular outer peripheral region of the building 12. One or two or more sides are provided at a predetermined distance in the horizontal direction. While one or more of the damper anchors 14 are formed using lead, copper, steel, or the like, another one or more of the damper anchors 14 are steel, spring steel, or the like. The one formed by is adopted.

  In this case, the curved portion 20 of the damper anchor 14 is curved in a substantially arcuate shape so as to protrude from the bolt portion 18 and the fixing plate portion 22 in one of the left and right directions (right in FIG. 2). Free length of the portion 20: L1 is one end (right in FIG. 2) of the bolt 18 connected to one end (upper in FIGS. 1 and 2) of the bending portion 20, and the bending portion 20. The distance between the other end (lower in FIGS. 1 and 2) and the central portion of the fixed plate portion 22 connected is larger than the linear separation distance L2.

  Accordingly, the damper anchor 14 is configured such that one end portion of the bolt portion 18 is fixed to the base 50 with the presser nut 68 and positioned on the side of the base 50 inside the building 12 (right in FIG. 2). The base-side fixing portion 74 of the damper anchor 14 is a portion where the fixing plate portion 22 is fixed to the anchor plate 24 and positioned on the side of the foundation beam 56 inside the building 12. Then, the damper anchor 14 is mounted on the building 12 in a form in which the curved portion 14 of the damper anchor 14 extends in a curved shape from the base side fixing portion 72 and the foundation side fixing portion 74 toward the inside of the building 12. The base 50 and the base beam 56 are fixed, and the linear separation distance between the base-side fixing portion 72 and the base-side fixing portion 74 in which the free length L1 of the bending portion 20 is opposed to each other in a substantially vertical direction. (L2 It is greater than. It is obvious that the separation distance L2 has a length dimension larger than the distance L0 between the vertically opposed surfaces of the base 50 and the foundation beam 56 that are overlapped via the roller packing 16. In the present embodiment, the curved portion 20 of the damper anchor 14 extends under the floor of the wooden house 44 inside the building 12.

  In the building 12 adopting the seismic isolation structure 10 having the above-described structure, the curved portion 20 constituting a part of the damper anchor 14 extends to the side of the base 50 and the foundation beam 56, and the damper anchor 14. Has a large free length.

  Therefore, when a large external force such as an earthquake is transmitted from the cloth foundation 46 to the wooden house 44, the horizontal displacement of the cloth foundation 46 and the wooden house 44 by the roller packing 16 is also shown in FIGS. However, a sufficient stroke is allowed based on the deformation of the bending portion 20 of the damper anchor 14. And with the relative displacement of the cloth foundation 46 and the wooden house 44 in the horizontal direction, the damper anchor 14 made of lead, copper, steel or the like is plastically deformed, and a damping effect is exhibited by this plastic deformation history. Thereby, the shaking in the wooden house 44 is quickly suppressed, and an excellent vibration isolation effect is exhibited. In addition, even when the vertical shaking such as a direct earthquake occurs, the damper anchor 14 is plastically deformed with the relative displacement of the fabric foundation 46 and the wooden house 44 in the vertical direction, and the same damping effect can be exhibited.

  When the relative displacement between the fabric foundation 46 and the wooden house 44 is small, the damper anchor 14 is deformed in the elastic deformation region. The vibration transmitted to the wooden house 44 is effectively damped. Further, the return operation of the roller packing 16 to the initial position is more rapidly and automatically manifested by the elasticity of the damper anchor 14 made of steel or spring steel.

  In addition, based on the rigidity of the damper anchor 14, the base 50 and the fabric foundation 46 are held firmly fixed when an external force is applied that is smaller than the vibration during an earthquake such as a typhoon. Thus, the base 50 can be stably supported with respect to the fabric foundation 46.

  Therefore, in the building 12 including the seismic isolation structure 10 according to the present embodiment, the cloth foundation 46 and the base 50 are fixed relative to each other in the horizontal direction while the fixed state of the cloth foundation 46 and the base 50 by the damper anchor 14 is maintained. By securing a sufficient amount of displacement, the anchor effect and seismic isolation effect for the fabric foundation 46 of the wooden house 44 can be achieved at a high level.

  In addition, in this embodiment, the steel balls 40 of the roller packing 16 roll on the upper and lower surfaces that are curved with each other in the accommodation region 38, so that the horizontal displacement of the base 50 and the fabric foundation 46 is allowed. Since the separation distance between both surfaces is the largest in the central portion of the accommodating region 38, the steel ball 40 located at a position deviated from the central portion when the base 50 and the fabric base 46 are displaced in the horizontal direction (FIGS. 12 to 14). The weight of the wooden house 44 is exerted on the steel ball 40, and the steel ball 40 can be positively displaced to the central portion. That is, by using the weight of the wooden house 44, the steel ball 40, and the curved surface of the roller packing 16, a centering function (recentive action) of the center portion in the width direction of the base 50 and the center portion in the width direction of the foundation beam 56 is obtained. Is possible. As a result, the restoration effect of returning the swayed wooden house 44 to the original position, and the seismic isolation effect, can be obtained more advantageously. The initial position restoring means according to the present embodiment includes the damper anchor 14, the steel ball 40, and the first one that are made of steel, spring steel, and the like and elastically deform with the horizontal displacement of the base 50 and the cloth foundation 46. And the second curved surfaces 41 and 43, and includes the roller packing 16 that obtains a centering function using the weight of the wooden house 44.

  As mentioned above, although one embodiment of the present invention has been described in detail, this is merely an example, and the present invention is not limited to any specific description by this embodiment, and is based on the knowledge of those skilled in the art. The present invention can be implemented with various changes, modifications, improvements, etc., and all such embodiments are within the scope of the present invention without departing from the spirit of the present invention. Needless to say, there is.

  For example, the shapes of the damper anchor 14 and the roller packing 16 such as shape, size, structure, position, range, number, etc. are not limited to those illustrated. Hereinafter, specific examples different from the above-described embodiment will be described with reference to the drawings, but members and parts having substantially the same structure as the above-described embodiment are denoted by the same reference numerals as in the above-described embodiment. Detailed description thereof will be omitted.

  Specifically, as shown in FIG. 15, the damper anchor 76 is separated from the lateral straight portion 78 and the base side fixing portion 74 as upper end side protruding portions that protrude horizontally from the base side fixing portion 72. A horizontal straight portion 78 as a lower side protrusion projecting in the horizontal direction and a pair of curved portions 80 having a relatively large curvature integrally formed at the protruding tip portion of each straight portion 78 are separated in the vertical direction. You may make it comprise including the vertical straight part 82 as a center part extended in the perpendicular direction between the protrusion front-end | tip parts of the curved part 80 made to oppose. As a result, a curved portion 80 is partially provided at a portion of the damper anchor 76 that extends laterally from the base 50 and the fabric foundation 46, while suppressing an excessive spread to the side and realizing a compact arrangement space. The free length may be effectively secured.

  Further, as vibration isolation means, in addition to the roller packing 16 shown in the above embodiment, a slide packing 84 as shown in FIGS. It is also possible to employ supplementary information. The slide packing 84 includes an upper collar member 86 and a lower collar member 88 that are overlapped with each other in the vertical direction, and the surface facing the upper collar member 86 of the lower collar member 88 is also shown in FIGS. As shown, one end surface (in FIG. 16, 17, upper) of a lower saddle member 88 that forms a circular concave and shallow mortar-shaped recess 90 and includes the bottom surface of the mortar-shaped recess 90. The steel plate 36 is applied over the whole. The bottom surface of the mortar-shaped recess 90 is curved over the whole downward, and the depth dimension is the largest in the central portion. The surface of the steel plate 36 attached to the bottom surface is a concave curved surface 89 that is curved with substantially the same curvature as the bottom surface. Further, on the surface facing the lower collar member 88 of the upper collar member 86, a circular convex contact protrusion 92 corresponding to the mortar-shaped recess 90 of the lower collar member 88 is provided, and the contact protrusion The steel plate 36 is attached over the entire end surface of one of the upper collar members 86 including the protruding front end surface 92 (in FIG. 16, 17, the lower side). The surface of the steel plate 36 to be attached to the protruding tip surface of the abutting protrusion 92 is a convex curved surface 91 that is curved with substantially the same curvature as the bottom surface. Thereby, the concave and convex curved surfaces 89 and 91 of the upper and lower saddle members 86 and 88 are overlapped with each other, and the upper and lower saddle members 86 and 88 are aligned on the same central axis as shown in FIG. In a normal state, the central portion of the convex curved surface 91 is positioned with respect to the deepest central portion of the concave curved surface 89, and as shown in FIG. Is moved in a contact state so as to ride on the outer peripheral portion of the concave curved surface 89, so that the upper and lower saddle members 86 and 88 can be displaced relatively in the horizontal direction while being slid. Further, when the base 50 and the fabric foundation 46 are displaced in the horizontal direction, the central portion of the contact protrusion 92 of the upper heel member 86 located at a position deviated from the central portion of the mortar-shaped recess 90 of the lower heel member 88 (FIG. 20). The weight of the wooden house 44 may be exerted on the upper eaves member 86 to positively slide and displace the central portion of the abutting protrusion 92 to the central portion of the mortar-shaped recess 90, thereby By using the weight of the wooden house 44 and the curved surface of the slide packing 84 to obtain the centering function of the center portion in the width direction of the base 50 and the center portion in the width direction of the foundation beam 56, the seismic isolation effect can be obtained more effectively. May be. In addition, a highly viscous fluid etc. can be apply | coated to the surface of the steel plate 36, a sliding displacement can be adjusted, and a friction sound can also be suppressed. Further, like the roller packing 16 in the above embodiment, the concave and convex curved surfaces 89 and 91 are roughened by performing shot blasting throughout. Thereby, the light motion of the slide packing 84 at the time of the external force effect | action with small vibration accelerations, such as a wind, can be suppressed. Further, in the initial state of the slide packing 84, the outer peripheral edge portions of the upper and lower flange members 86 and 88 are brought into contact with each other in a sealed state. Further, the roller packing 16 and the slide packing 84 can be easily replaced when damaged after the performance is exhibited.

  Note that such a slide packing 84 can be used in the seismic isolation structure in place of the roller packing 16. In this case, it is not necessary to employ the steel balls 40 such as the roller packing 16 according to the above-described embodiment, and the cost can be reduced as the number of parts is reduced.

  Furthermore, it is of course possible to employ a known isolator as the vibration isolating means instead of or in addition to the roller packing 16 and the slide packing 84 described above.

  Further, the base side fixing portion 74 of the damper anchor 14 according to the embodiment is fixed to the anchor plate 24 in which the fixing plate portion 22 formed at one end portion of the damper anchor 14 is embedded in the base beam 56. However, the present invention is not limited to this. For example, the end of the damper anchor may be directly embedded and fixed to the foundation beam such that the damper anchor extends to the side of the foundation beam. It is also possible to embed and adhere to the footing 54 of the fabric foundation 46.

  Moreover, in the said embodiment, although the damper anchor 14 was extended inside the building 12 which is one side of the base 50 and the fabric foundation 56, it was on the outer side (appearance) of the building which is the other side. It may be extended.

  Further, instead of the first curved surface 41 provided in the central portion of the mortar-shaped recess 34 (steel plate 36) of the upper and lower flange members 30, 32 of the roller packing 16 according to the embodiment, for example, FIG. As shown in the figure, by adopting the conical surface 94 having a conical surface shape, the surface of the steel plate 36 applied to the mortar-shaped recess 34 is configured to include the conical surface 94 and the second curved surface 43. May be. The conical surface 94 is positioned at the central portion of the mortar-shaped recess 34, and the outer peripheral portion is smoothly connected to the inner peripheral portion of the second curved surface 43. The central portion provided with extends in the tangential direction of the second curved surface 43. By adopting such a roller packing provided with the upper and lower saddle members, particularly when the steel ball 40 is positioned at the central portion of the accommodation region 38, the steel ball 40 is circumferentially aligned with the surface near the top of the conical surface 94. Therefore, the steel ball 40 can be stably supported by the central portion of the accommodating region 38, and the centering function can be exhibited more advantageously.

  Further, the conical surface 94 can be used in place of the concave curved surface 89 formed over substantially the entire mortar-shaped recess 34 of the lower collar member 88 of the slide packing 84 according to the above-described specific example. is there. Thereby, the contact area of the upper collar member 86 with the convex curved surface 91 may be reduced to adjust the sliding displacement of the upper and lower collar members.

  Moreover, in the building 12 which concerns on the said embodiment, it was in the fixing member of the base 50 and the cloth foundation 46, and the damper anchor 14 made into the structure according to this invention was employ | adopted, for example, in patent documents 1, 2, A conventional anchor that extends vertically between the foundation and the fabric foundation as shown, with one end penetrating and fixed vertically through the foundation, and the other end embedded in the fabric foundation The present invention can also be applied to an existing building including a bolt as a part of a fixing member.

  In addition, in the said embodiment, although the seismic isolation structure 10 of the building which concerns on this invention was shown with respect to the building 12 provided with the wooden house 44 and the cloth foundation 46, the specific example was shown, Of course, it can be advantageously applied to various small buildings such as warehouses.

The perspective view shown in the form which carried out the partial cross section view of the principal part of the building which adopted the seismic isolation structure as one embodiment of the present invention. The figure which is a front view of the damper anchor which comprises some seismic isolation structures, and is equivalent to the longitudinal cross-sectional view of the building. The rear view of the damper anchor. Left side view of the damper anchor. The right side view of the damper anchor. The top view of the damper anchor. The bottom view of the damper anchor. The perspective view which shows the roller packing which comprises a part of the seismic isolation structure in the form which carried out the partial cross section view. The longitudinal cross-sectional view of the roller packing. The top view of the lower collar which comprises a part of the roller packing. XI-XI sectional drawing of FIG. The longitudinal cross-sectional view which shows one action | operation form of the roller packing. The longitudinal cross-sectional view which shows one form of the building. The longitudinal cross-sectional view which shows another one form of the building. The perspective view which shows the principal part of the building which employ | adopted the seismic isolation structure as another specific example of this invention in the form which carried out the partial cross section view. The perspective view which shows the slide packing which comprises a part of seismic isolation structure as another specific example of this invention with the form which carried out the partial cross section view. The longitudinal cross-sectional view of the slide packing. The top view of the lower collar member which comprises a part of the slide packing. XVIIII-XVIIII sectional drawing of FIG. The longitudinal cross-sectional view which shows one action | operation form of the slide packing. The longitudinal cross-sectional view of the lower collar which comprises a part of roller packing used for the seismic isolation structure as another specific example of this invention. The longitudinal cross-sectional view of the lower collar which comprises a part of slide packing used for the seismic isolation structure as another specific example of this invention.

Explanation of symbols

10: seismic isolation structure, 12: building, 14: damper anchor, 16: roller packing, 44: wooden house, 46: fabric foundation, 50: foundation, 72: foundation side fixing part, 74: foundation side fixing part

Claims (15)

A vibration isolation means is disposed between the foundation and the foundation of the building, and the load of the superstructure including the foundation in the building is transmitted and supported to the foundation via the vibration insulation means. In the seismic isolation structure of a building that allows relative displacement in the horizontal direction with respect to the foundation of the superstructure of the building,
A metal connecting member that is located on the side of the base and the base and extends in the vertical direction is disposed, and the upper end of the connecting member is fixed to the base, while the lower end of the connecting member is fixed to the base. By connecting the foundation and the foundation by the connecting member having a length dimension larger than the distance between the opposing surfaces in the vertical direction between the foundation and the foundation overlaid via the vibration isolation means, A seismic isolation structure for a building, wherein the connecting member is deformed when the upper structure of the building is displaced relative to the foundation in a horizontal direction. The connecting member is
An upper end lateral protrusion extending outward from the side surface of the base;
A lower end lateral protrusion that extends outward from the side of the foundation beam in the foundation;
The integrated structure including a projecting tip portion of the upper end side projecting portion and a projecting tip portion of the lower end side projecting portion integrally and a central portion extending in the vertical direction. Seismic isolation structure for buildings.   The seismic isolation structure for buildings according to claim 1 or 2, wherein the connecting member has a smoothly continuous shape without having a bent portion over its entire length.   The said connection member which connects the said foundation | substrate and the said foundation is provided with two or more, At least 1 has a different elastic limit with respect to another connection member among these connection members. A seismic isolation structure for a building according to any one of the above.   The mounting base is fixed to the foundation, and the base-side fixing portion of the connecting member is fixed to a portion of the mounting base exposed from the side of the foundation. A seismic isolation structure for a building according to any one of the above.   The seismic isolation structure for a building according to any one of claims 1 to 5, wherein the connecting member is attached to the base and the foundation so as to be attached later.   The seismic isolation structure for a building according to any one of claims 1 to 6, wherein the connecting member is detachable from the base and the foundation.   The building according to any one of claims 1 to 7, further comprising an initial position restoring unit that applies a restoring force in a returning direction to an initial position when the base is displaced relative to the foundation in a horizontal direction. Seismic isolation structure. A lower support member fixed to the foundation and an upper support member fixed to the base are arranged to overlap each other in the vertical direction, and the opposing surfaces of the lower support member and the upper support member are respectively arranged on the other side. Forming a mortar-shaped recess that opens toward the bottom, and incorporating the spherical rolling member between the opposing surfaces of both the recesses of the lower support member and the upper support member to constitute the vibration isolation means,
In a normal state in which the lower support member and the upper support member are aligned on the same central axis, the rolling is provided between the recesses of the lower support member and the central deepest portions of the recesses of the upper support member. Allow the member to be positioned,
When the upper structure of the building is displaced relative to the foundation in the horizontal direction, the rolling member extends in a direction to ride over the recess of the lower support member and the recess of the upper support member. The seismic isolation structure for a building according to any one of claims 1 to 8, which is adapted to be moved.   The mortar-shaped recess is composed of a central portion having a conical surface shape and an outer peripheral edge portion having a curved surface shape, and the central portion of the conical surface shape is a tangent to the outer peripheral edge portion of the curved surface shape. The seismic isolation structure for a building according to claim 9 extending in a direction. A lower support member fixed to the foundation and an upper support member fixed to the base are arranged to overlap in the vertical direction, and a mortar-like shape that opens upward on the upper surface of the lower support member While forming a recess, a contact protrusion protruding downward is formed on the lower surface of the upper support member, and the corresponding contact protrusion of the upper support member is placed in the recess of the lower support member. By constituting the protruding position, the vibration isolation means is configured,
In a normal state where the lower support member and the upper support member are aligned on the same central axis, the corresponding protrusion of the upper support member protrudes from the deepest central portion of the recess of the lower support member. To be positioned,
When the upper structure of the building is displaced relative to the foundation in the horizontal direction, the corresponding contact protrusion of the upper support member rides on the inner surface of the recess of the lower support member. The seismic isolation structure for a building according to any one of claims 1 to 8, wherein the structure is moved in a contact state.   The seismic isolation structure for a building according to claim 11, wherein the mortar-shaped recess has a conical shape as a whole.   The seismic isolation structure for a building according to any one of claims 9 to 12, wherein a viscous material is accommodated in the recess of the lower support member.   14. The lower support member and the upper support member are brought into contact with each other in a sealed state at an outer peripheral edge portion of the recess in the normal state. Seismic isolation structure for buildings.   A building comprising the seismic isolation structure according to any one of claims 1 to 14.

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